Articles | Volume 17, issue 1
https://doi.org/10.5194/cp-17-269-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-17-269-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Review article
| Highlight paper
| 
28 Jan 2021
Review article | Highlight paper |
| 28 Jan 2021
| 28 Jan 2021
The Eocene–Oligocene transition: a review of marine and terrestrial proxy data, models and model–data comparisons
David K. Hutchinson
CORRESPONDING AUTHOR
Department of Geological Sciences and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
Helen K. Coxall
Department of Geological Sciences and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
Daniel J. Lunt
School of Geographical Sciences, University of Bristol, Bristol, UK
Margret Steinthorsdottir
Department of Geological Sciences and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
Department of Palaeobiology, Swedish Museum of Natural History, Stockholm, Sweden
Agatha M. de Boer
Department of Geological Sciences and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
Michiel Baatsen
Institute for Marine and Atmospheric Research, Department of Physics, Utrecht University, Utrecht, the Netherlands
Anna von der Heydt
Institute for Marine and Atmospheric Research, Department of Physics, Utrecht University, Utrecht, the Netherlands
Centre for Complex Systems Studies, Utrecht University, Utrecht, the Netherlands
Matthew Huber
Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, USA
Alan T. Kennedy-Asser
School of Geographical Sciences, University of Bristol, Bristol, UK
Lutz Kunzmann
Senckenberg Natural History Collections, Dresden, Germany
Jean-Baptiste Ladant
Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, USA
Caroline H. Lear
School of Earth and Ocean Sciences, Cardiff University, Cardiff, UK
Karolin Moraweck
Senckenberg Natural History Collections, Dresden, Germany
Paul N. Pearson
School of Earth and Ocean Sciences, Cardiff University, Cardiff, UK
Emanuela Piga
School of Earth and Ocean Sciences, Cardiff University, Cardiff, UK
Matthew J. Pound
Department of Geography and Environmental Sciences, Northumbria University, Newcastle upon Tyne, UK
Ulrich Salzmann
Department of Geography and Environmental Sciences, Northumbria University, Newcastle upon Tyne, UK
Howie D. Scher
School of the Earth, Ocean and Environment, University of South Carolina, Columbia SC, USA
Willem P. Sijp
Climate Change Research Centre, University of New South Wales, Sydney, Australia
Kasia K. Śliwińska
Department of Stratigraphy, Geological Survey of Denmark and Greenland (GEUS), Copenhagen, Denmark
Paul A. Wilson
University of Southampton, National Oceanography Centre, Southampton, UK
Zhongshi Zhang
Department of Atmospheric Science, China University of Geoscience, Wuhan, China
NORCE Research and Bjerknes Centre for Climate Research, Bergen, Norway
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Kasia K. Śliwińska, Helen K. Coxall, David K. Hutchinson, Diederik Liebrand, Stefan Schouten, and Agatha M. de Boer
Clim. Past, 19, 123–140, https://doi.org/10.5194/cp-19-123-2023, https://doi.org/10.5194/cp-19-123-2023, 2023
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We provide a sea surface temperature record from the Labrador Sea (ODP Site 647) based on organic geochemical proxies across the late Eocene and early Oligocene. Our study reveals heterogenic cooling of the Atlantic. The cooling of the North Atlantic is difficult to reconcile with the active Atlantic Meridional Overturning Circulation (AMOC). We discuss possible explanations like uncertainty in the data, paleogeography and atmospheric CO2 boundary conditions, model weaknesses, and AMOC activity.
This article is included in the Encyclopedia of Geosciences
Daniel J. Lunt, Fran Bragg, Wing-Le Chan, David K. Hutchinson, Jean-Baptiste Ladant, Polina Morozova, Igor Niezgodzki, Sebastian Steinig, Zhongshi Zhang, Jiang Zhu, Ayako Abe-Ouchi, Eleni Anagnostou, Agatha M. de Boer, Helen K. Coxall, Yannick Donnadieu, Gavin Foster, Gordon N. Inglis, Gregor Knorr, Petra M. Langebroek, Caroline H. Lear, Gerrit Lohmann, Christopher J. Poulsen, Pierre Sepulchre, Jessica E. Tierney, Paul J. Valdes, Evgeny M. Volodin, Tom Dunkley Jones, Christopher J. Hollis, Matthew Huber, and Bette L. Otto-Bliesner
Clim. Past, 17, 203–227, https://doi.org/10.5194/cp-17-203-2021, https://doi.org/10.5194/cp-17-203-2021, 2021
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This paper presents the first modelling results from the Deep-Time Model Intercomparison Project (DeepMIP), in which we focus on the early Eocene climatic optimum (EECO, 50 million years ago). We show that, in contrast to previous work, at least three models (CESM, GFDL, and NorESM) produce climate states that are consistent with proxy indicators of global mean temperature and polar amplification, and they achieve this at a CO2 concentration that is consistent with the CO2 proxy record.
This article is included in the Encyclopedia of Geosciences
Gordon N. Inglis, Fran Bragg, Natalie J. Burls, Marlow Julius Cramwinckel, David Evans, Gavin L. Foster, Matthew Huber, Daniel J. Lunt, Nicholas Siler, Sebastian Steinig, Jessica E. Tierney, Richard Wilkinson, Eleni Anagnostou, Agatha M. de Boer, Tom Dunkley Jones, Kirsty M. Edgar, Christopher J. Hollis, David K. Hutchinson, and Richard D. Pancost
Clim. Past, 16, 1953–1968, https://doi.org/10.5194/cp-16-1953-2020, https://doi.org/10.5194/cp-16-1953-2020, 2020
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This paper presents estimates of global mean surface temperatures and climate sensitivity during the early Paleogene (∼57–48 Ma). We employ a multi-method experimental approach and show that i) global mean surface temperatures range between 27 and 32°C and that ii) estimates of
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bulkequilibrium climate sensitivity (∼3 to 4.5°C) fall within the range predicted by the IPCC AR5 Report. This work improves our understanding of two key climate metrics during the early Paleogene.
Eleanor Rainsley, Chris S. M. Turney, Nicholas R. Golledge, Janet M. Wilmshurst, Matt S. McGlone, Alan G. Hogg, Bo Li, Zoë A. Thomas, Richard Roberts, Richard T. Jones, Jonathan G. Palmer, Verity Flett, Gregory de Wet, David K. Hutchinson, Mathew J. Lipson, Pavla Fenwick, Ben R. Hines, Umberto Binetti, and Christopher J. Fogwill
Clim. Past, 15, 423–448, https://doi.org/10.5194/cp-15-423-2019, https://doi.org/10.5194/cp-15-423-2019, 2019
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The New Zealand subantarctic islands, in the Pacific sector of the Southern Ocean, provide valuable records of past environmental change. We find that the Auckland Islands hosted a small ice cap around 384 000 years ago, but that there was little glaciation during the Last Glacial Maximum, around 21 000 years ago, in contrast to mainland New Zealand. This shows that the climate here is susceptible to changes in regional factors such as sea-ice expanse and the position of ocean fronts.
This article is included in the Encyclopedia of Geosciences
David K. Hutchinson, Agatha M. de Boer, Helen K. Coxall, Rodrigo Caballero, Johan Nilsson, and Michiel Baatsen
Clim. Past, 14, 789–810, https://doi.org/10.5194/cp-14-789-2018, https://doi.org/10.5194/cp-14-789-2018, 2018
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The Eocene--Oligocene transition was a major cooling event 34 million years ago. Climate model studies of this transition have used low ocean resolution or topography that roughly approximates the time period. We present a new climate model simulation of the late Eocene, with higher ocean resolution and topography which is accurately designed for this time period. These features improve the ocean circulation and gateways which are thought to be important for this climate transition.
This article is included in the Encyclopedia of Geosciences
Ling Zhang, Lu Li, Zhongshi Zhang, Joël Arnault, Stefan Sobolowski, Anthony Musili Mwanthi, Pratik Kad, Mohammed Abdullahi Hassan, Tanja Portele, and Harald Kunstmann
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2024-278, https://doi.org/10.5194/hess-2024-278, 2024
Preprint under review for HESS
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To address challenges related to unreliable hydrological simulations, we present an enhanced hydrological simulation with a refined climate model and a more comprehensive hydrological model. The model with the two parts outperforms that without, especially in migrating bias in peak flow and dry-season flow. Our findings highlight the enhanced hydrological simulation capability with the refined climate and lake module contributing 24 % and 76 % improvement, respectively.
This article is included in the Encyclopedia of Geosciences
Nick R. Hayes, Daniel J. Lunt, Yves Goddéris, Richard D. Pancost, and Heather L. Buss
EGUsphere, https://doi.org/10.5194/egusphere-2024-2811, https://doi.org/10.5194/egusphere-2024-2811, 2024
This preprint is open for discussion and under review for Climate of the Past (CP).
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The breakdown of volcanic rocks by water helps balance the climate of the earth by sequestering atmospheric CO2 . The rate of CO2 sequestration is referred to as "weatherability". Our modelling study finds that continental position strongly impacts CO2 concentrations, that runoff strongly controls weatherability, that changes in weatherability may explain long term trends in atmospheric CO2 concentrations, and that even relatively localised changes in weatherability may have global impacts.
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Arthur Merlijn Oldeman, Michiel L. J. Baatsen, Anna S. von der Heydt, Frank M. Selten, and Henk A. Dijkstra
Earth Syst. Dynam., 15, 1037–1054, https://doi.org/10.5194/esd-15-1037-2024, https://doi.org/10.5194/esd-15-1037-2024, 2024
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We might be able to constrain uncertainty in future climate projections by investigating variations in the climate of the past. In this study, we investigate the interactions of climate variability between the tropical Pacific (El Niño) and the North Pacific in a warm past climate – the mid-Pliocene, a period roughly 3 million years ago. Using model simulations, we find that, although the variability in El Niño was reduced, the variability in the North Pacific atmosphere was not.
This article is included in the Encyclopedia of Geosciences
Dominique K. L. L. Jenny, Tammo Reichgelt, Charlotte L. O'Brien, Xiaoqing Liu, Peter K. Bijl, Matthew Huber, and Appy Sluijs
Clim. Past, 20, 1627–1657, https://doi.org/10.5194/cp-20-1627-2024, https://doi.org/10.5194/cp-20-1627-2024, 2024
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This study reviews the current state of knowledge regarding the Oligocene
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icehouseclimate. We extend an existing marine climate proxy data compilation and present a new compilation and analysis of terrestrial plant assemblages to assess long-term climate trends and variability. Our data–climate model comparison reinforces the notion that models underestimate polar amplification of Oligocene climates, and we identify potential future research directions.
Sacha Sinet, Peter Ashwin, Anna S. von der Heydt, and Henk A. Dijkstra
Earth Syst. Dynam., 15, 859–873, https://doi.org/10.5194/esd-15-859-2024, https://doi.org/10.5194/esd-15-859-2024, 2024
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Some components of the Earth system may irreversibly collapse under global warming. Among them, the Atlantic Meridional Overturning Circulation (AMOC), the Greenland Ice Sheet, and West Antarctica Ice Sheet are of utmost importance for maintaining the present-day climate. In a simplified model, we show that both the rate of ice melting and the natural variability linked to freshwater fluxes over the Atlantic Ocean drastically affect how an ice sheet collapse impacts the AMOC stability.
This article is included in the Encyclopedia of Geosciences
Flavia Boscolo-Galazzo, David Evans, Elaine Mawbey, William Gray, Paul Pearson, and Bridget Wade
EGUsphere, https://doi.org/10.5194/egusphere-2024-1608, https://doi.org/10.5194/egusphere-2024-1608, 2024
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Here we present a comparison of results from the Mg/Ca and oxygen stable isotopes paleothermometers obtained from 57 modern to fossil species of planktonic foraminifera from the last 15 million of years. We find that the occurrence (or not) of species-species offsets in Mg/Ca is conservative between ancestor-descendent species, and that taking into account species kinship can significantly improve temperature reconstructions by several degrees.
This article is included in the Encyclopedia of Geosciences
Chris D. Fokkema, Tobias Agterhuis, Danielle Gerritsma, Myrthe de Goeij, Xiaoqing Liu, Pauline de Regt, Addison Rice, Laurens Vennema, Claudia Agnini, Peter K. Bijl, Joost Frieling, Matthew Huber, Francien Peterse, and Appy Sluijs
Clim. Past, 20, 1303–1325, https://doi.org/10.5194/cp-20-1303-2024, https://doi.org/10.5194/cp-20-1303-2024, 2024
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Polar amplification (PA) is a key uncertainty in climate projections. The factors that dominantly control PA are difficult to separate. Here we provide an estimate for the non-ice-related PA by reconstructing tropical ocean temperature variability from the ice-free early Eocene, which we compare to deep-ocean-derived high-latitude temperature variability across short-lived warming periods. We find a PA factor of 1.7–2.3 on 20 kyr timescales, which is somewhat larger than model estimates.
This article is included in the Encyclopedia of Geosciences
Dennis H.A. Vermeulen, Michiel L. J. Baatsen, and Anna S. von der Heydt
Clim. Past Discuss., https://doi.org/10.5194/cp-2024-30, https://doi.org/10.5194/cp-2024-30, 2024
Revised manuscript under review for CP
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Late-Eocene summers, 34 million years ago, were hot on Antarctica, with temperatures up to 30 °C. We also know that during that period the first Antarctic Ice Sheet formed. Since climate models don’t show this transition from warm climate to ice sheet formation accurately, we imposed regional ice sheets onto the continent in a realistic climate, and show that these ice sheets don't melt away. This suggests that the initiation of ice sheet growth might indeed have happened during warmer periods.
This article is included in the Encyclopedia of Geosciences
Julia E. Weiffenbach, Henk A. Dijkstra, Anna S. von der Heydt, Ayako Abe-Ouchi, Wing-Le Chan, Deepak Chandan, Ran Feng, Alan M. Haywood, Stephen J. Hunter, Xiangyu Li, Bette L. Otto-Bliesner, W. Richard Peltier, Christian Stepanek, Ning Tan, Julia C. Tindall, and Zhongshi Zhang
Clim. Past, 20, 1067–1086, https://doi.org/10.5194/cp-20-1067-2024, https://doi.org/10.5194/cp-20-1067-2024, 2024
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Elevated atmospheric CO2 concentrations and a smaller Antarctic Ice Sheet during the mid-Pliocene (~ 3 million years ago) cause the Southern Ocean surface to become fresher and warmer, which affects the global ocean circulation. The CO2 concentration and the smaller Antarctic Ice Sheet both have a similar and approximately equal impact on the Southern Ocean. The conditions of the Southern Ocean in the mid-Pliocene could therefore be analogous to those in a future climate with smaller ice sheets.
This article is included in the Encyclopedia of Geosciences
Flor Vermassen, Clare Bird, Tirza M. Weitkamp, Kate F. Darling, Hanna Farnelid, Céline Heuzé, Allison Y. Hsiang, Salar Karam, Christian Stranne, Marcus Sundbom, and Helen K. Coxall
EGUsphere, https://doi.org/10.5194/egusphere-2024-1091, https://doi.org/10.5194/egusphere-2024-1091, 2024
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We provide the first systematic survey of planktonic foraminifera in the high Arctic Ocean. Our results describe the abundance and species composition under summer sea-ice. They indicate that the polar specialist N. pachyderma is the only species present, with subpolar species absent. The dataset will be a valuable reference for continued monitoring of the state of planktonic foraminifera communities as they respond to the ongoing sea-ice decline and the ‘Atlantification’ of the Arctic Ocean.
This article is included in the Encyclopedia of Geosciences
Jonna van Mourik, Hylke de Vries, and Michiel Baatsen
EGUsphere, https://doi.org/10.5194/egusphere-2024-999, https://doi.org/10.5194/egusphere-2024-999, 2024
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Atmospheric blockings are quasi-stationary high-pressure areas with large influences on our weather. We show that using the most common blocking index does not only lead to stationary blocks, but also to east- and westward moving blocks. These respective moving blocks are found to have different characteristics in size and location. Even though they are not stationary, they still impact our surface temperatures. Thus, for impact analyses no restriction in propagation velocity is needed.
This article is included in the Encyclopedia of Geosciences
Yixuan Xie, Daniel J. Lunt, and Paul J. Valdes
Clim. Past Discuss., https://doi.org/10.5194/cp-2024-22, https://doi.org/10.5194/cp-2024-22, 2024
Revised manuscript accepted for CP
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Dust plays a crucial role in the climate system; while it is relatively well studied for the present day, we still lack how it was in the past and the underlying mechanism in the multi-million-year time scale of Earth’s history. Here, for the first time, we simulate dust emissions with the newly developed DUSTY model over the past 540 million years with a temporal resolution of ~5 million years and identify palaeogeography as the primary control of these variations.
This article is included in the Encyclopedia of Geosciences
Arthur Merlijn Oldeman, Michiel L. J. Baatsen, Anna S. von der Heydt, Aarnout J. van Delden, and Henk A. Dijkstra
Weather Clim. Dynam., 5, 395–417, https://doi.org/10.5194/wcd-5-395-2024, https://doi.org/10.5194/wcd-5-395-2024, 2024
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The mid-Pliocene, a geological period around 3 million years ago, is sometimes considered the best analogue for near-future climate. It saw similar CO2 concentrations to the present-day but also a slightly different geography. In this study, we use climate model simulations and find that the Northern Hemisphere winter responds very differently to increased CO2 or to the mid-Pliocene geography. Our results weaken the potential of the mid-Pliocene as a future climate analogue.
Frances A. Procter, Sandra Piazolo, Eleanor H. John, Richard Walshaw, Paul N. Pearson, Caroline H. Lear, and Tracy Aze
Biogeosciences, 21, 1213–1233, https://doi.org/10.5194/bg-21-1213-2024, https://doi.org/10.5194/bg-21-1213-2024, 2024
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This study uses novel techniques to look at the microstructure of planktonic foraminifera (single-celled marine organisms) fossils, to further our understanding of how they form their hard exterior shells and how the microstructure and chemistry of these shells can change as a result of processes that occur after deposition on the seafloor. Understanding these processes is of critical importance for using planktonic foraminifera for robust climate and environmental reconstructions of the past.
This article is included in the Encyclopedia of Geosciences
Nico Wunderling, Anna S. von der Heydt, Yevgeny Aksenov, Stephen Barker, Robbin Bastiaansen, Victor Brovkin, Maura Brunetti, Victor Couplet, Thomas Kleinen, Caroline H. Lear, Johannes Lohmann, Rosa Maria Roman-Cuesta, Sacha Sinet, Didier Swingedouw, Ricarda Winkelmann, Pallavi Anand, Jonathan Barichivich, Sebastian Bathiany, Mara Baudena, John T. Bruun, Cristiano M. Chiessi, Helen K. Coxall, David Docquier, Jonathan F. Donges, Swinda K. J. Falkena, Ann Kristin Klose, David Obura, Juan Rocha, Stefanie Rynders, Norman Julius Steinert, and Matteo Willeit
Earth Syst. Dynam., 15, 41–74, https://doi.org/10.5194/esd-15-41-2024, https://doi.org/10.5194/esd-15-41-2024, 2024
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This paper maps out the state-of-the-art literature on interactions between tipping elements relevant for current global warming pathways. We find indications that many of the interactions between tipping elements are destabilizing. This means that tipping cascades cannot be ruled out on centennial to millennial timescales at global warming levels between 1.5 and 2.0 °C or on shorter timescales if global warming surpasses 2.0 °C.
This article is included in the Encyclopedia of Geosciences
Michiel Baatsen, Peter Bijl, Anna von der Heydt, Appy Sluijs, and Henk Dijkstra
Clim. Past, 20, 77–90, https://doi.org/10.5194/cp-20-77-2024, https://doi.org/10.5194/cp-20-77-2024, 2024
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This work introduces the possibility and consequences of monsoons on Antarctica in the warm Eocene climate. We suggest that such a monsoonal climate can be important to understand conditions in Antarctica prior to large-scale glaciation. We can explain seemingly contradictory indications of ice and vegetation on the continent through regional variability. In addition, we provide a new mechanism through which most of Antarctica remained ice-free through a wide range of global climatic changes.
This article is included in the Encyclopedia of Geosciences
Werner Ehrmann, Paul A. Wilson, Helge W. Arz, Hartmut Schulz, and Gerhard Schmiedl
Clim. Past, 20, 37–52, https://doi.org/10.5194/cp-20-37-2024, https://doi.org/10.5194/cp-20-37-2024, 2024
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Climatic and associated hydrological changes controlled the aeolian versus fluvial transport processes and the composition of the sediments in the central Red Sea through the last ca. 200 kyr. We identify source areas of the mineral dust and pulses of fluvial discharge based on high-resolution grain size, clay mineral, and geochemical data, together with Nd and Sr isotope data. We provide a detailed reconstruction of changes in aridity/humidity.
This article is included in the Encyclopedia of Geosciences
Mallory Pilie, Martha E. Gibson, Ingrid C. Romero, Noelia B. Nuñez Otaño, Matthew J. Pound, Jennifer M. K. O'Keefe, and Sophie Warny
J. Micropalaeontol., 42, 291–307, https://doi.org/10.5194/jm-42-291-2023, https://doi.org/10.5194/jm-42-291-2023, 2023
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The ANDRILL SMS site provides the first Middle Miocene Antarctic fungal record. The CREST plant-based paleoclimate reconstructions confirm an intensification of the hydrological cycle during the MCO, with the Ross Sea region reconstructed 279 % wetter than modern conditions and a maximum mean annual temperature of 10.3 °C for the warmest intervals of the MCO. The plant-based reconstructions indicate a temperate, no dry season with a warm summer (Cfb) Köppen–Geiger climate classification.
This article is included in the Encyclopedia of Geosciences
Elwyn de la Vega, Thomas B. Chalk, Mathis P. Hain, Megan R. Wilding, Daniel Casey, Robin Gledhill, Chongguang Luo, Paul A. Wilson, and Gavin L. Foster
Clim. Past, 19, 2493–2510, https://doi.org/10.5194/cp-19-2493-2023, https://doi.org/10.5194/cp-19-2493-2023, 2023
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We evaluate how faithfully the boron isotope composition of foraminifera records atmospheric CO2 by comparing it to the high-fidelity CO2 record from the Antarctic ice cores. We evaluate potential factors and find that partial dissolution of foraminifera shells, assumptions of seawater chemistry, and the biology of foraminifera all have a negligible effect on reconstructed CO2. This gives confidence in the use of boron isotopes beyond the interval when ice core CO2 is available.
This article is included in the Encyclopedia of Geosciences
Paul N. Pearson, Jeremy Young, David J. King, and Bridget S. Wade
J. Micropalaeontol., 42, 211–255, https://doi.org/10.5194/jm-42-211-2023, https://doi.org/10.5194/jm-42-211-2023, 2023
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Planktonic foraminifera are marine plankton that have a long and continuous fossil record. They are used for correlating and dating ocean sediments and studying evolution and past climates. This paper presents new information about Pulleniatina, one of the most widespread and abundant groups, from an important site in the Pacific Ocean. It also brings together a very large amount of information on the fossil record from other sites globally.
This article is included in the Encyclopedia of Geosciences
Amber Adore Boot, Anna S. von der Heydt, and Henk A. Dijkstra
Earth Syst. Dynam. Discuss., https://doi.org/10.5194/esd-2023-30, https://doi.org/10.5194/esd-2023-30, 2023
Revised manuscript accepted for ESD
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We investigate the multiple equilibria window (MEW) of the Atlantic Meridional Overturning Circulation (AMOC) within a box model. We find that increasing the total carbon content of the system widens the MEW of the AMOC. The important mechanisms at play are the balance between the source and sink of carbon and the sensitivity of the AMOC to freshwater forcing over the Atlantic Ocean. Our results suggest that changes in the marine carbon cycle can influence AMOC stability in future climates.
This article is included in the Encyclopedia of Geosciences
Anna Hauge Braaten, Kim A. Jakob, Sze Ling Ho, Oliver Friedrich, Eirik Vinje Galaasen, Stijn De Schepper, Paul A. Wilson, and Anna Nele Meckler
Clim. Past, 19, 2109–2125, https://doi.org/10.5194/cp-19-2109-2023, https://doi.org/10.5194/cp-19-2109-2023, 2023
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In the context of understanding current global warming, the middle Pliocene (3.3–3.0 million years ago) is an important interval in Earth's history because atmospheric carbon dioxide concentrations were similar to levels today. We have reconstructed deep-sea temperatures at two different locations for this period, and find that a very different mode of ocean circulation or mixing existed, with important implications for how heat was transported in the deep ocean.
This article is included in the Encyclopedia of Geosciences
Xin Ren, Daniel J. Lunt, Erica Hendy, Anna von der Heydt, Ayako Abe-Ouchi, Bette Otto-Bliesner, Charles J. R. Williams, Christian Stepanek, Chuncheng Guo, Deepak Chandan, Gerrit Lohmann, Julia C. Tindall, Linda E. Sohl, Mark A. Chandler, Masa Kageyama, Michiel L. J. Baatsen, Ning Tan, Qiong Zhang, Ran Feng, Stephen Hunter, Wing-Le Chan, W. Richard Peltier, Xiangyu Li, Youichi Kamae, Zhongshi Zhang, and Alan M. Haywood
Clim. Past, 19, 2053–2077, https://doi.org/10.5194/cp-19-2053-2023, https://doi.org/10.5194/cp-19-2053-2023, 2023
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We investigate the Maritime Continent climate in the mid-Piacenzian warm period and find it is warmer and wetter and the sea surface salinity is lower compared with preindustrial period. Besides, the fresh and warm water transfer through the Maritime Continent was stronger. In order to avoid undue influence from closely related models in the multimodel results, we introduce a new metric, the multi-cluster mean, which could reveal spatial signals that are not captured by the multimodel mean.
This article is included in the Encyclopedia of Geosciences
Kim Senger, Denise Kulhanek, Morgan T. Jones, Aleksandra Smyrak-Sikora, Sverre Planke, Valentin Zuchuat, William J. Foster, Sten-Andreas Grundvåg, Henning Lorenz, Micha Ruhl, Kasia K. Sliwinska, Madeleine L. Vickers, and Weimu Xu
Sci. Dril., 32, 113–135, https://doi.org/10.5194/sd-32-113-2023, https://doi.org/10.5194/sd-32-113-2023, 2023
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Geologists can decipher the past climates and thus better understand how future climate change may affect the Earth's complex systems. In this paper, we report on a workshop held in Longyearbyen, Svalbard, to better understand how rocks in Svalbard (an Arctic archipelago) can be used to quantify major climatic shifts recorded in the past.
This article is included in the Encyclopedia of Geosciences
Marcin Latas, Paul N. Pearson, Christopher R. Poole, Alessio Fabbrini, and Bridget S. Wade
J. Micropalaeontol., 42, 57–81, https://doi.org/10.5194/jm-42-57-2023, https://doi.org/10.5194/jm-42-57-2023, 2023
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Planktonic foraminifera are microscopic single-celled organisms populating world oceans. They have one of the most complete fossil records; thanks to their great abundance, they are widely used to study past marine environments. We analysed and measured series of foraminifera shells from Indo-Pacific sites, which led to the description of a new species of fossil planktonic foraminifera. Part of its population exhibits pink pigmentation, which is only the third such case among known species.
This article is included in the Encyclopedia of Geosciences
Jasper de Jong, Michiel L. J. Baatsen, and Aarnout J. van Delden
EGUsphere, https://doi.org/10.5194/egusphere-2023-1259, https://doi.org/10.5194/egusphere-2023-1259, 2023
Preprint archived
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Tropical cyclones often embed a ring-shaped vorticity tower, instead of a centre maximum. Inspired to identify mechanisms in the conservation of such a vorticity structure, we examined the vorticity budget in a simulation of hurricane Irma (2017) near lifetime-peak intensity. Hurricane Irma persisted as a category five hurricane for three consecutive days. We find that vertical exchange of momentum by diabatic heating compensates the advective vorticity loss and eddy activity plays a minor role.
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Bjørg Risebrobakken, Mari F. Jensen, Helene R. Langehaug, Tor Eldevik, Anne Britt Sandø, Camille Li, Andreas Born, Erin Louise McClymont, Ulrich Salzmann, and Stijn De Schepper
Clim. Past, 19, 1101–1123, https://doi.org/10.5194/cp-19-1101-2023, https://doi.org/10.5194/cp-19-1101-2023, 2023
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In the observational period, spatially coherent sea surface temperatures characterize the northern North Atlantic at multidecadal timescales. We show that spatially non-coherent temperature patterns are seen both in further projections and a past warm climate period with a CO2 level comparable to the future low-emission scenario. Buoyancy forcing is shown to be important for northern North Atlantic temperature patterns.
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Louise C. Sime, Rahul Sivankutty, Irene Vallet-Malmierca, Agatha M. de Boer, and Marie Sicard
Clim. Past, 19, 883–900, https://doi.org/10.5194/cp-19-883-2023, https://doi.org/10.5194/cp-19-883-2023, 2023
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It is not known if the Last Interglacial (LIG) experienced Arctic summers that were sea ice free: models show a wide spread in LIG Arctic temperature and sea ice results. Evaluation against sea ice markers is hampered by few observations. Here, an assessment of 11 climate model simulations against summer temperatures shows that the most skilful models have a 74 %–79 % reduction in LIG sea ice. The measurements of LIG areas indicate a likely mix of ice-free and near-ice-free LIG summers.
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Lauren E. Burton, Alan M. Haywood, Julia C. Tindall, Aisling M. Dolan, Daniel J. Hill, Ayako Abe-Ouchi, Wing-Le Chan, Deepak Chandan, Ran Feng, Stephen J. Hunter, Xiangyu Li, W. Richard Peltier, Ning Tan, Christian Stepanek, and Zhongshi Zhang
Clim. Past, 19, 747–764, https://doi.org/10.5194/cp-19-747-2023, https://doi.org/10.5194/cp-19-747-2023, 2023
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Warm climates of the Pliocene (~ 3 million years ago) are similar to projections of the near future. We find elevated concentrations of atmospheric carbon dioxide to be the most important forcing for driving changes in Pliocene surface air temperature, sea surface temperature, and precipitation. However, changes caused by the nature of Pliocene ice sheets and orography are also important, affecting the extent to which we can use the Pliocene as an analogue for our warmer future.
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Jesse R. Farmer, Katherine J. Keller, Robert K. Poirier, Gary S. Dwyer, Morgan F. Schaller, Helen K. Coxall, Matt O'Regan, and Thomas M. Cronin
Clim. Past, 19, 555–578, https://doi.org/10.5194/cp-19-555-2023, https://doi.org/10.5194/cp-19-555-2023, 2023
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Oxygen isotopes are used to date marine sediments via similar large-scale ocean patterns over glacial cycles. However, the Arctic Ocean exhibits a different isotope pattern, creating uncertainty in the timing of past Arctic climate change. We find that the Arctic Ocean experienced large local oxygen isotope changes over glacial cycles. We attribute this to a breakdown of stratification during ice ages that allowed for a unique low isotope value to characterize the ice age Arctic Ocean.
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Kasia K. Śliwińska, Helen K. Coxall, David K. Hutchinson, Diederik Liebrand, Stefan Schouten, and Agatha M. de Boer
Clim. Past, 19, 123–140, https://doi.org/10.5194/cp-19-123-2023, https://doi.org/10.5194/cp-19-123-2023, 2023
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We provide a sea surface temperature record from the Labrador Sea (ODP Site 647) based on organic geochemical proxies across the late Eocene and early Oligocene. Our study reveals heterogenic cooling of the Atlantic. The cooling of the North Atlantic is difficult to reconcile with the active Atlantic Meridional Overturning Circulation (AMOC). We discuss possible explanations like uncertainty in the data, paleogeography and atmospheric CO2 boundary conditions, model weaknesses, and AMOC activity.
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Julia E. Weiffenbach, Michiel L. J. Baatsen, Henk A. Dijkstra, Anna S. von der Heydt, Ayako Abe-Ouchi, Esther C. Brady, Wing-Le Chan, Deepak Chandan, Mark A. Chandler, Camille Contoux, Ran Feng, Chuncheng Guo, Zixuan Han, Alan M. Haywood, Qiang Li, Xiangyu Li, Gerrit Lohmann, Daniel J. Lunt, Kerim H. Nisancioglu, Bette L. Otto-Bliesner, W. Richard Peltier, Gilles Ramstein, Linda E. Sohl, Christian Stepanek, Ning Tan, Julia C. Tindall, Charles J. R. Williams, Qiong Zhang, and Zhongshi Zhang
Clim. Past, 19, 61–85, https://doi.org/10.5194/cp-19-61-2023, https://doi.org/10.5194/cp-19-61-2023, 2023
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We study the behavior of the Atlantic Meridional Overturning Circulation (AMOC) in the mid-Pliocene. The mid-Pliocene was about 3 million years ago and had a similar CO2 concentration to today. We show that the stronger AMOC during this period relates to changes in geography and that this has a significant influence on ocean temperatures and heat transported northwards by the Atlantic Ocean. Understanding the behavior of the mid-Pliocene AMOC can help us to learn more about our future climate.
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Paul N. Pearson, Eleanor John, Bridget S. Wade, Simon D'haenens, and Caroline H. Lear
J. Micropalaeontol., 41, 107–127, https://doi.org/10.5194/jm-41-107-2022, https://doi.org/10.5194/jm-41-107-2022, 2022
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The microscopic shells of planktonic foraminifera accumulate on the sea floor over millions of years, providing a rich archive for understanding the history of the oceans. We examined an extinct group that flourished between about 63 and 32 million years ago using scanning electron microscopy and show that they were covered with needle-like spines in life. This has implications for analytical methods that we use to determine past seawater temperature and acidity.
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Amber Boot, Anna S. von der Heydt, and Henk A. Dijkstra
Earth Syst. Dynam., 13, 1041–1058, https://doi.org/10.5194/esd-13-1041-2022, https://doi.org/10.5194/esd-13-1041-2022, 2022
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Atmospheric pCO2 of the past shows large variability on different timescales. We focus on the effect of the strength of Atlantic Meridional Overturning Circulation (AMOC) on this variability and on the AMOC–pCO2 relationship. We find that climatic boundary conditions and the representation of biology in our model are most important for this relationship. Under certain conditions, we find internal oscillations, which can be relevant for atmospheric pCO2 variability during glacial cycles.
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Julia C. Tindall, Alan M. Haywood, Ulrich Salzmann, Aisling M. Dolan, and Tamara Fletcher
Clim. Past, 18, 1385–1405, https://doi.org/10.5194/cp-18-1385-2022, https://doi.org/10.5194/cp-18-1385-2022, 2022
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The mid-Pliocene (MP; ∼3.0 Ma) had CO2 levels similar to today and average temperatures ∼3°C warmer. At terrestrial high latitudes, MP temperatures from climate models are much lower than those reconstructed from data. This mismatch occurs in the winter but not the summer. The winter model–data mismatch likely has multiple causes. One novel cause is that the MP climate may be outside the modern sample, and errors could occur when using information from the modern era to reconstruct climate.
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Carolien M. H. van der Weijst, Josse Winkelhorst, Wesley de Nooijer, Anna von der Heydt, Gert-Jan Reichart, Francesca Sangiorgi, and Appy Sluijs
Clim. Past, 18, 961–973, https://doi.org/10.5194/cp-18-961-2022, https://doi.org/10.5194/cp-18-961-2022, 2022
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A hypothesized link between Pliocene (5.3–2.5 million years ago) global climate and tropical thermocline depth is currently only backed up by data from the Pacific Ocean. In our paper, we present temperature, salinity, and thermocline records from the tropical Atlantic Ocean. Surprisingly, the Pliocene thermocline evolution was remarkably different in the Atlantic and Pacific. We need to reevaluate the mechanisms that drive thermocline depth, and how these are tied to global climate change.
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Michiel L. J. Baatsen, Anna S. von der Heydt, Michael A. Kliphuis, Arthur M. Oldeman, and Julia E. Weiffenbach
Clim. Past, 18, 657–679, https://doi.org/10.5194/cp-18-657-2022, https://doi.org/10.5194/cp-18-657-2022, 2022
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The Pliocene was a period during which atmospheric CO2 was similar to today (i.e. ~ 400 ppm). We present the results of model simulations carried out within the Pliocene Model Intercomparison Project Phase 2 (PlioMIP2) using the CESM 1.0.5. We find a climate that is much warmer than today, with augmented polar warming, increased precipitation, and strongly reduced sea ice cover. In addition, several leading modes of variability in temperature show an altered behaviour.
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Michael Amoo, Ulrich Salzmann, Matthew J. Pound, Nick Thompson, and Peter K. Bijl
Clim. Past, 18, 525–546, https://doi.org/10.5194/cp-18-525-2022, https://doi.org/10.5194/cp-18-525-2022, 2022
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Late Eocene to earliest Oligocene (37.97–33.06 Ma) climate and vegetation dynamics around the Tasmanian Gateway region reveal that changes in ocean circulation due to accelerated deepening of the Tasmanian Gateway may not have been solely responsible for the changes in terrestrial climate and vegetation; a series of regional and global events, including a change in stratification of water masses and changes in pCO2, may have played significant roles.
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Agathe Toumoulin, Delphine Tardif, Yannick Donnadieu, Alexis Licht, Jean-Baptiste Ladant, Lutz Kunzmann, and Guillaume Dupont-Nivet
Clim. Past, 18, 341–362, https://doi.org/10.5194/cp-18-341-2022, https://doi.org/10.5194/cp-18-341-2022, 2022
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Temperature seasonality is an important climate parameter for biodiversity. Fossil plants describe its middle Eocene to early Oligocene increase in the Northern Hemisphere, but underlying mechanisms have not been studied in detail yet. Using climate simulations, we map global seasonality changes and show that major contemporary forcing – atmospheric CO2 lowering, Antarctic ice-sheet expansion and particularly related sea level drop – participated in this phenomenon and its spatial distribution.
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Peter D. Nooteboom, Peter K. Bijl, Christian Kehl, Erik van Sebille, Martin Ziegler, Anna S. von der Heydt, and Henk A. Dijkstra
Earth Syst. Dynam., 13, 357–371, https://doi.org/10.5194/esd-13-357-2022, https://doi.org/10.5194/esd-13-357-2022, 2022
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Having descended through the water column, microplankton in ocean sediments represents the ocean surface environment and is used as an archive of past and present surface oceanographic conditions. However, this microplankton is advected by turbulent ocean currents during its sinking journey. We use simulations of sinking particles to define ocean bottom provinces and detect these provinces in datasets of sedimentary microplankton, which has implications for palaeoclimate reconstructions.
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Flavia Boscolo-Galazzo, Amy Jones, Tom Dunkley Jones, Katherine A. Crichton, Bridget S. Wade, and Paul N. Pearson
Biogeosciences, 19, 743–762, https://doi.org/10.5194/bg-19-743-2022, https://doi.org/10.5194/bg-19-743-2022, 2022
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Deep-living organisms are a major yet poorly known component of ocean biomass. Here we reconstruct the evolution of deep-living zooplankton and phytoplankton. Deep-dwelling zooplankton and phytoplankton did not occur 15 Myr ago, when the ocean was several degrees warmer than today. Deep-dwelling species first evolve around 7.5 Myr ago, following global climate cooling. Their evolution was driven by colder ocean temperatures allowing more food, oxygen, and light at depth.
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Nick Thompson, Ulrich Salzmann, Adrián López-Quirós, Peter K. Bijl, Frida S. Hoem, Johan Etourneau, Marie-Alexandrine Sicre, Sabine Roignant, Emma Hocking, Michael Amoo, and Carlota Escutia
Clim. Past, 18, 209–232, https://doi.org/10.5194/cp-18-209-2022, https://doi.org/10.5194/cp-18-209-2022, 2022
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New pollen and spore data from the Antarctic Peninsula region reveal temperate rainforests that changed and adapted in response to Eocene climatic cooling, roughly 35.5 Myr ago, and glacially related disturbance in the early Oligocene, approximately 33.5 Myr ago. The timing of these events indicates that the opening of ocean gateways alone did not trigger Antarctic glaciation, although ocean gateways may have played a role in climate cooling.
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Zixuan Han, Qiong Zhang, Qiang Li, Ran Feng, Alan M. Haywood, Julia C. Tindall, Stephen J. Hunter, Bette L. Otto-Bliesner, Esther C. Brady, Nan Rosenbloom, Zhongshi Zhang, Xiangyu Li, Chuncheng Guo, Kerim H. Nisancioglu, Christian Stepanek, Gerrit Lohmann, Linda E. Sohl, Mark A. Chandler, Ning Tan, Gilles Ramstein, Michiel L. J. Baatsen, Anna S. von der Heydt, Deepak Chandan, W. Richard Peltier, Charles J. R. Williams, Daniel J. Lunt, Jianbo Cheng, Qin Wen, and Natalie J. Burls
Clim. Past, 17, 2537–2558, https://doi.org/10.5194/cp-17-2537-2021, https://doi.org/10.5194/cp-17-2537-2021, 2021
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Understanding the potential processes responsible for large-scale hydrological cycle changes in a warmer climate is of great importance. Our study implies that an imbalance in interhemispheric atmospheric energy during the mid-Pliocene could have led to changes in the dynamic effect, offsetting the thermodynamic effect and, hence, altering mid-Pliocene hydroclimate cycling. Moreover, a robust westward shift in the Pacific Walker circulation can moisten the northern Indian Ocean.
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Arthur M. Oldeman, Michiel L. J. Baatsen, Anna S. von der Heydt, Henk A. Dijkstra, Julia C. Tindall, Ayako Abe-Ouchi, Alice R. Booth, Esther C. Brady, Wing-Le Chan, Deepak Chandan, Mark A. Chandler, Camille Contoux, Ran Feng, Chuncheng Guo, Alan M. Haywood, Stephen J. Hunter, Youichi Kamae, Qiang Li, Xiangyu Li, Gerrit Lohmann, Daniel J. Lunt, Kerim H. Nisancioglu, Bette L. Otto-Bliesner, W. Richard Peltier, Gabriel M. Pontes, Gilles Ramstein, Linda E. Sohl, Christian Stepanek, Ning Tan, Qiong Zhang, Zhongshi Zhang, Ilana Wainer, and Charles J. R. Williams
Clim. Past, 17, 2427–2450, https://doi.org/10.5194/cp-17-2427-2021, https://doi.org/10.5194/cp-17-2427-2021, 2021
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In this work, we have studied the behaviour of El Niño events in the mid-Pliocene, a period of around 3 million years ago, using a collection of 17 climate models. It is an interesting period to study, as it saw similar atmospheric carbon dioxide levels to the present day. We find that the El Niño events were less strong in the mid-Pliocene simulations, when compared to pre-industrial climate. Our results could help to interpret El Niño behaviour in future climate projections.
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Katherine A. Crichton, Andy Ridgwell, Daniel J. Lunt, Alex Farnsworth, and Paul N. Pearson
Clim. Past, 17, 2223–2254, https://doi.org/10.5194/cp-17-2223-2021, https://doi.org/10.5194/cp-17-2223-2021, 2021
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The middle Miocene (15 Ma) was a period of global warmth up to 8 °C warmer than present. We investigate changes in ocean circulation and heat distribution since the middle Miocene and the cooling to the present using the cGENIE Earth system model. We create seven time slices at ~2.5 Myr intervals, constrained with paleo-proxy data, showing a progressive reduction in atmospheric CO2 and a strengthening of the Atlantic Meridional Overturning Circulation.
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Charles J. R. Williams, Alistair A. Sellar, Xin Ren, Alan M. Haywood, Peter Hopcroft, Stephen J. Hunter, William H. G. Roberts, Robin S. Smith, Emma J. Stone, Julia C. Tindall, and Daniel J. Lunt
Clim. Past, 17, 2139–2163, https://doi.org/10.5194/cp-17-2139-2021, https://doi.org/10.5194/cp-17-2139-2021, 2021
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Computer simulations of the geological past are an important tool to improve our understanding of climate change. We present results from a simulation of the mid-Pliocene (approximately 3 million years ago) using the latest version of the UK’s climate model. The simulation reproduces temperatures as expected and shows some improvement relative to previous versions of the same model. The simulation is, however, arguably too warm when compared to other models and available observations.
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André Jüling, Anna von der Heydt, and Henk A. Dijkstra
Ocean Sci., 17, 1251–1271, https://doi.org/10.5194/os-17-1251-2021, https://doi.org/10.5194/os-17-1251-2021, 2021
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On top of forced changes such as human-caused global warming, unforced climate variability exists. Most multidecadal variability (MV) involves the oceans, but current climate models use non-turbulent, coarse-resolution oceans. We investigate the effect of resolving important turbulent ocean features on MV. We find that ocean heat content, ocean–atmosphere heat flux, and global mean surface temperature MV is more pronounced in the higher-resolution model relative to higher-frequency variability.
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Ellen Berntell, Qiong Zhang, Qiang Li, Alan M. Haywood, Julia C. Tindall, Stephen J. Hunter, Zhongshi Zhang, Xiangyu Li, Chuncheng Guo, Kerim H. Nisancioglu, Christian Stepanek, Gerrit Lohmann, Linda E. Sohl, Mark A. Chandler, Ning Tan, Camille Contoux, Gilles Ramstein, Michiel L. J. Baatsen, Anna S. von der Heydt, Deepak Chandan, William Richard Peltier, Ayako Abe-Ouchi, Wing-Le Chan, Youichi Kamae, Charles J. R. Williams, Daniel J. Lunt, Ran Feng, Bette L. Otto-Bliesner, and Esther C. Brady
Clim. Past, 17, 1777–1794, https://doi.org/10.5194/cp-17-1777-2021, https://doi.org/10.5194/cp-17-1777-2021, 2021
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The mid-Pliocene Warm Period (~ 3.2 Ma) is often considered an analogue for near-future climate projections, and model results from the PlioMIP2 ensemble show an increase of rainfall over West Africa and the Sahara region compared to pre-industrial conditions. Though previous studies of future projections show a west–east drying–wetting contrast over the Sahel, these results indicate a uniform rainfall increase over the Sahel in warm climates characterized by increased greenhouse gas forcing.
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Paul J. Valdes, Christopher R. Scotese, and Daniel J. Lunt
Clim. Past, 17, 1483–1506, https://doi.org/10.5194/cp-17-1483-2021, https://doi.org/10.5194/cp-17-1483-2021, 2021
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Deep ocean temperatures are widely used as a proxy for global mean surface temperature in the past, but the underlying assumptions have not been tested. We use two unique sets of 109 climate model simulations for the last 545 million years to show that the relationship is valid for approximately the last 100 million years but breaks down for older time periods when the continents (and hence ocean circulation) are in very different positions.
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Daniel J. Lunt, Deepak Chandan, Alan M. Haywood, George M. Lunt, Jonathan C. Rougier, Ulrich Salzmann, Gavin A. Schmidt, and Paul J. Valdes
Geosci. Model Dev., 14, 4307–4317, https://doi.org/10.5194/gmd-14-4307-2021, https://doi.org/10.5194/gmd-14-4307-2021, 2021
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Often in science we carry out experiments with computers in which several factors are explored, for example, in the field of climate science, how the factors of greenhouse gases, ice, and vegetation affect temperature. We can explore the relative importance of these factors by
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swapping in and outdifferent values of these factors, and can also carry out experiments with many different combinations of these factors. This paper discusses how best to analyse the results from such experiments.
André Jüling, Xun Zhang, Daniele Castellana, Anna S. von der Heydt, and Henk A. Dijkstra
Ocean Sci., 17, 729–754, https://doi.org/10.5194/os-17-729-2021, https://doi.org/10.5194/os-17-729-2021, 2021
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We investigate how the freshwater budget of the Atlantic changes under climate change, which has implications for the stability of the Atlantic Meridional Overturning Circulation. We compare the effect of ocean model resolution in a climate model and find many similarities between the simulations, enhancing trust in the current generation of climate models. However, ocean biases are reduced in the strongly eddying simulation, and significant local freshwater budget differences exist.
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Zhongshi Zhang, Xiangyu Li, Chuncheng Guo, Odd Helge Otterå, Kerim H. Nisancioglu, Ning Tan, Camille Contoux, Gilles Ramstein, Ran Feng, Bette L. Otto-Bliesner, Esther Brady, Deepak Chandan, W. Richard Peltier, Michiel L. J. Baatsen, Anna S. von der Heydt, Julia E. Weiffenbach, Christian Stepanek, Gerrit Lohmann, Qiong Zhang, Qiang Li, Mark A. Chandler, Linda E. Sohl, Alan M. Haywood, Stephen J. Hunter, Julia C. Tindall, Charles Williams, Daniel J. Lunt, Wing-Le Chan, and Ayako Abe-Ouchi
Clim. Past, 17, 529–543, https://doi.org/10.5194/cp-17-529-2021, https://doi.org/10.5194/cp-17-529-2021, 2021
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The Atlantic Meridional Overturning Circulation (AMOC) is an important topic in the Pliocene Model Intercomparison Project. Previous studies have suggested a much stronger AMOC during the Pliocene than today. However, our current multi-model intercomparison shows large model spreads and model–data discrepancies, which can not support the previous hypothesis. Our study shows good consistency with future projections of the AMOC.
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Daniel J. Lunt, Fran Bragg, Wing-Le Chan, David K. Hutchinson, Jean-Baptiste Ladant, Polina Morozova, Igor Niezgodzki, Sebastian Steinig, Zhongshi Zhang, Jiang Zhu, Ayako Abe-Ouchi, Eleni Anagnostou, Agatha M. de Boer, Helen K. Coxall, Yannick Donnadieu, Gavin Foster, Gordon N. Inglis, Gregor Knorr, Petra M. Langebroek, Caroline H. Lear, Gerrit Lohmann, Christopher J. Poulsen, Pierre Sepulchre, Jessica E. Tierney, Paul J. Valdes, Evgeny M. Volodin, Tom Dunkley Jones, Christopher J. Hollis, Matthew Huber, and Bette L. Otto-Bliesner
Clim. Past, 17, 203–227, https://doi.org/10.5194/cp-17-203-2021, https://doi.org/10.5194/cp-17-203-2021, 2021
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This paper presents the first modelling results from the Deep-Time Model Intercomparison Project (DeepMIP), in which we focus on the early Eocene climatic optimum (EECO, 50 million years ago). We show that, in contrast to previous work, at least three models (CESM, GFDL, and NorESM) produce climate states that are consistent with proxy indicators of global mean temperature and polar amplification, and they achieve this at a CO2 concentration that is consistent with the CO2 proxy record.
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Katherine A. Crichton, Jamie D. Wilson, Andy Ridgwell, and Paul N. Pearson
Geosci. Model Dev., 14, 125–149, https://doi.org/10.5194/gmd-14-125-2021, https://doi.org/10.5194/gmd-14-125-2021, 2021
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Temperature is a controller of metabolic processes and therefore also a controller of the ocean's biological carbon pump (BCP). We calibrate a temperature-dependent version of the BCP in the cGENIE Earth system model. Since the pre-industrial period, warming has intensified near-surface nutrient recycling, supporting production and largely offsetting stratification-induced surface nutrient limitation. But at the same time less carbon that sinks out of the surface then reaches the deep ocean.
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Masa Kageyama, Louise C. Sime, Marie Sicard, Maria-Vittoria Guarino, Anne de Vernal, Ruediger Stein, David Schroeder, Irene Malmierca-Vallet, Ayako Abe-Ouchi, Cecilia Bitz, Pascale Braconnot, Esther C. Brady, Jian Cao, Matthew A. Chamberlain, Danny Feltham, Chuncheng Guo, Allegra N. LeGrande, Gerrit Lohmann, Katrin J. Meissner, Laurie Menviel, Polina Morozova, Kerim H. Nisancioglu, Bette L. Otto-Bliesner, Ryouta O'ishi, Silvana Ramos Buarque, David Salas y Melia, Sam Sherriff-Tadano, Julienne Stroeve, Xiaoxu Shi, Bo Sun, Robert A. Tomas, Evgeny Volodin, Nicholas K. H. Yeung, Qiong Zhang, Zhongshi Zhang, Weipeng Zheng, and Tilo Ziehn
Clim. Past, 17, 37–62, https://doi.org/10.5194/cp-17-37-2021, https://doi.org/10.5194/cp-17-37-2021, 2021
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The Last interglacial (ca. 127 000 years ago) is a period with increased summer insolation at high northern latitudes, resulting in a strong reduction in Arctic sea ice. The latest PMIP4-CMIP6 models all simulate this decrease, consistent with reconstructions. However, neither the models nor the reconstructions agree on the possibility of a seasonally ice-free Arctic. Work to clarify the reasons for this model divergence and the conflicting interpretations of the records will thus be needed.
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Bette L. Otto-Bliesner, Esther C. Brady, Anni Zhao, Chris M. Brierley, Yarrow Axford, Emilie Capron, Aline Govin, Jeremy S. Hoffman, Elizabeth Isaacs, Masa Kageyama, Paolo Scussolini, Polychronis C. Tzedakis, Charles J. R. Williams, Eric Wolff, Ayako Abe-Ouchi, Pascale Braconnot, Silvana Ramos Buarque, Jian Cao, Anne de Vernal, Maria Vittoria Guarino, Chuncheng Guo, Allegra N. LeGrande, Gerrit Lohmann, Katrin J. Meissner, Laurie Menviel, Polina A. Morozova, Kerim H. Nisancioglu, Ryouta O'ishi, David Salas y Mélia, Xiaoxu Shi, Marie Sicard, Louise Sime, Christian Stepanek, Robert Tomas, Evgeny Volodin, Nicholas K. H. Yeung, Qiong Zhang, Zhongshi Zhang, and Weipeng Zheng
Clim. Past, 17, 63–94, https://doi.org/10.5194/cp-17-63-2021, https://doi.org/10.5194/cp-17-63-2021, 2021
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The CMIP6–PMIP4 Tier 1 lig127k experiment was designed to address the climate responses to strong orbital forcing. We present a multi-model ensemble of 17 climate models, most of which have also completed the CMIP6 DECK experiments and are thus important for assessing future projections. The lig127ksimulations show strong summer warming over the NH continents. More than half of the models simulate a retreat of the Arctic minimum summer ice edge similar to the average for 2000–2018.
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Michiel Baatsen, Anna S. von der Heydt, Matthew Huber, Michael A. Kliphuis, Peter K. Bijl, Appy Sluijs, and Henk A. Dijkstra
Clim. Past, 16, 2573–2597, https://doi.org/10.5194/cp-16-2573-2020, https://doi.org/10.5194/cp-16-2573-2020, 2020
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Warm climates of the deep past have proven to be challenging to reconstruct with the same numerical models used for future predictions. We present results of CESM simulations for the middle to late Eocene (∼ 38 Ma), in which we managed to match the available indications of temperature well. With these results we can now look into regional features and the response to external changes to ultimately better understand the climate when it is in such a warm state.
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Øyvind Seland, Mats Bentsen, Dirk Olivié, Thomas Toniazzo, Ada Gjermundsen, Lise Seland Graff, Jens Boldingh Debernard, Alok Kumar Gupta, Yan-Chun He, Alf Kirkevåg, Jörg Schwinger, Jerry Tjiputra, Kjetil Schanke Aas, Ingo Bethke, Yuanchao Fan, Jan Griesfeller, Alf Grini, Chuncheng Guo, Mehmet Ilicak, Inger Helene Hafsahl Karset, Oskar Landgren, Johan Liakka, Kine Onsum Moseid, Aleksi Nummelin, Clemens Spensberger, Hui Tang, Zhongshi Zhang, Christoph Heinze, Trond Iversen, and Michael Schulz
Geosci. Model Dev., 13, 6165–6200, https://doi.org/10.5194/gmd-13-6165-2020, https://doi.org/10.5194/gmd-13-6165-2020, 2020
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The second version of the coupled Norwegian Earth System Model (NorESM2) is presented and evaluated. The temperature and precipitation patterns has improved compared to NorESM1. The model reaches present-day warming levels to within 0.2 °C of observed temperature but with a delayed warming during the late 20th century. Under the four scenarios (SSP1-2.6, SSP2-4.5, SSP3-7.0, and SSP5-8.5), the warming in the period of 2090–2099 compared to 1850–1879 reaches 1.3, 2.2, 3.1, and 3.9 K.
This article is included in the Encyclopedia of Geosciences
Wesley de Nooijer, Qiong Zhang, Qiang Li, Qiang Zhang, Xiangyu Li, Zhongshi Zhang, Chuncheng Guo, Kerim H. Nisancioglu, Alan M. Haywood, Julia C. Tindall, Stephen J. Hunter, Harry J. Dowsett, Christian Stepanek, Gerrit Lohmann, Bette L. Otto-Bliesner, Ran Feng, Linda E. Sohl, Mark A. Chandler, Ning Tan, Camille Contoux, Gilles Ramstein, Michiel L. J. Baatsen, Anna S. von der Heydt, Deepak Chandan, W. Richard Peltier, Ayako Abe-Ouchi, Wing-Le Chan, Youichi Kamae, and Chris M. Brierley
Clim. Past, 16, 2325–2341, https://doi.org/10.5194/cp-16-2325-2020, https://doi.org/10.5194/cp-16-2325-2020, 2020
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The simulations for the past climate can inform us about the performance of climate models in different climate scenarios. Here, we analyse Arctic warming in an ensemble of 16 simulations of the mid-Pliocene Warm Period (mPWP), when the CO2 level was comparable to today. The results highlight the importance of slow feedbacks in the model simulations and imply that we must be careful when using simulations of the mPWP as an analogue for future climate change.
This article is included in the Encyclopedia of Geosciences
Alan M. Haywood, Julia C. Tindall, Harry J. Dowsett, Aisling M. Dolan, Kevin M. Foley, Stephen J. Hunter, Daniel J. Hill, Wing-Le Chan, Ayako Abe-Ouchi, Christian Stepanek, Gerrit Lohmann, Deepak Chandan, W. Richard Peltier, Ning Tan, Camille Contoux, Gilles Ramstein, Xiangyu Li, Zhongshi Zhang, Chuncheng Guo, Kerim H. Nisancioglu, Qiong Zhang, Qiang Li, Youichi Kamae, Mark A. Chandler, Linda E. Sohl, Bette L. Otto-Bliesner, Ran Feng, Esther C. Brady, Anna S. von der Heydt, Michiel L. J. Baatsen, and Daniel J. Lunt
Clim. Past, 16, 2095–2123, https://doi.org/10.5194/cp-16-2095-2020, https://doi.org/10.5194/cp-16-2095-2020, 2020
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The large-scale features of middle Pliocene climate from the 16 models of PlioMIP Phase 2 are presented. The PlioMIP2 ensemble average was ~ 3.2 °C warmer and experienced ~ 7 % more precipitation than the pre-industrial era, although there are large regional variations. PlioMIP2 broadly agrees with a new proxy dataset of Pliocene sea surface temperatures. Combining PlioMIP2 and proxy data suggests that a doubling of atmospheric CO2 would increase globally averaged temperature by 2.6–4.8 °C.
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Gordon N. Inglis, Fran Bragg, Natalie J. Burls, Marlow Julius Cramwinckel, David Evans, Gavin L. Foster, Matthew Huber, Daniel J. Lunt, Nicholas Siler, Sebastian Steinig, Jessica E. Tierney, Richard Wilkinson, Eleni Anagnostou, Agatha M. de Boer, Tom Dunkley Jones, Kirsty M. Edgar, Christopher J. Hollis, David K. Hutchinson, and Richard D. Pancost
Clim. Past, 16, 1953–1968, https://doi.org/10.5194/cp-16-1953-2020, https://doi.org/10.5194/cp-16-1953-2020, 2020
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This paper presents estimates of global mean surface temperatures and climate sensitivity during the early Paleogene (∼57–48 Ma). We employ a multi-method experimental approach and show that i) global mean surface temperatures range between 27 and 32°C and that ii) estimates of
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bulkequilibrium climate sensitivity (∼3 to 4.5°C) fall within the range predicted by the IPCC AR5 Report. This work improves our understanding of two key climate metrics during the early Paleogene.
Chris M. Brierley, Anni Zhao, Sandy P. Harrison, Pascale Braconnot, Charles J. R. Williams, David J. R. Thornalley, Xiaoxu Shi, Jean-Yves Peterschmitt, Rumi Ohgaito, Darrell S. Kaufman, Masa Kageyama, Julia C. Hargreaves, Michael P. Erb, Julien Emile-Geay, Roberta D'Agostino, Deepak Chandan, Matthieu Carré, Partrick J. Bartlein, Weipeng Zheng, Zhongshi Zhang, Qiong Zhang, Hu Yang, Evgeny M. Volodin, Robert A. Tomas, Cody Routson, W. Richard Peltier, Bette Otto-Bliesner, Polina A. Morozova, Nicholas P. McKay, Gerrit Lohmann, Allegra N. Legrande, Chuncheng Guo, Jian Cao, Esther Brady, James D. Annan, and Ayako Abe-Ouchi
Clim. Past, 16, 1847–1872, https://doi.org/10.5194/cp-16-1847-2020, https://doi.org/10.5194/cp-16-1847-2020, 2020
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This paper provides an initial exploration and comparison to climate reconstructions of the new climate model simulations of the mid-Holocene (6000 years ago). These use state-of-the-art models developed for CMIP6 and apply the same experimental set-up. The models capture several key aspects of the climate, but some persistent issues remain.
This article is included in the Encyclopedia of Geosciences
Josephine R. Brown, Chris M. Brierley, Soon-Il An, Maria-Vittoria Guarino, Samantha Stevenson, Charles J. R. Williams, Qiong Zhang, Anni Zhao, Ayako Abe-Ouchi, Pascale Braconnot, Esther C. Brady, Deepak Chandan, Roberta D'Agostino, Chuncheng Guo, Allegra N. LeGrande, Gerrit Lohmann, Polina A. Morozova, Rumi Ohgaito, Ryouta O'ishi, Bette L. Otto-Bliesner, W. Richard Peltier, Xiaoxu Shi, Louise Sime, Evgeny M. Volodin, Zhongshi Zhang, and Weipeng Zheng
Clim. Past, 16, 1777–1805, https://doi.org/10.5194/cp-16-1777-2020, https://doi.org/10.5194/cp-16-1777-2020, 2020
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El Niño–Southern Oscillation (ENSO) is the largest source of year-to-year variability in the current climate, but the response of ENSO to past or future changes in climate is uncertain. This study compares the strength and spatial pattern of ENSO in a set of climate model simulations in order to explore how ENSO changes in different climates, including past cold glacial climates and past climates with different seasonal cycles, as well as gradual and abrupt future warming cases.
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Kasia K. Śliwińska and Martin J. Head
J. Micropalaeontol., 39, 139–154, https://doi.org/10.5194/jm-39-139-2020, https://doi.org/10.5194/jm-39-139-2020, 2020
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We described two new species of the fossil dinoflagellate cyst genus Svalbardella. S. clausii sp. nov. has a narrow range in the lowermost Chattian and may be related to cooler surface waters. S. kareniae sp. nov. ranges from Lower Oligocene to Lower Miocene and favours more open marine conditions.
Our study illustrates the close phylogenetic relationship between Svalbardella and Palaeocystodinium and shows that surface ornamentation and the tabulation are variable features within both genera.
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Erin L. McClymont, Heather L. Ford, Sze Ling Ho, Julia C. Tindall, Alan M. Haywood, Montserrat Alonso-Garcia, Ian Bailey, Melissa A. Berke, Kate Littler, Molly O. Patterson, Benjamin Petrick, Francien Peterse, A. Christina Ravelo, Bjørg Risebrobakken, Stijn De Schepper, George E. A. Swann, Kaustubh Thirumalai, Jessica E. Tierney, Carolien van der Weijst, Sarah White, Ayako Abe-Ouchi, Michiel L. J. Baatsen, Esther C. Brady, Wing-Le Chan, Deepak Chandan, Ran Feng, Chuncheng Guo, Anna S. von der Heydt, Stephen Hunter, Xiangyi Li, Gerrit Lohmann, Kerim H. Nisancioglu, Bette L. Otto-Bliesner, W. Richard Peltier, Christian Stepanek, and Zhongshi Zhang
Clim. Past, 16, 1599–1615, https://doi.org/10.5194/cp-16-1599-2020, https://doi.org/10.5194/cp-16-1599-2020, 2020
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We examine the sea-surface temperature response to an interval of climate ~ 3.2 million years ago, when CO2 concentrations were similar to today and the near future. Our geological data and climate models show that global mean sea-surface temperatures were 2.3 to 3.2 ºC warmer than pre-industrial climate, that the mid-latitudes and high latitudes warmed more than the tropics, and that the warming was particularly enhanced in the North Atlantic Ocean.
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Carolien Maria Hendrina van der Weijst, Josse Winkelhorst, Anna von der Heydt, Gert-Jan Reichart, Francesca Sangiorgi, and Appy Sluijs
Clim. Past Discuss., https://doi.org/10.5194/cp-2020-105, https://doi.org/10.5194/cp-2020-105, 2020
Manuscript not accepted for further review
Charles J. R. Williams, Maria-Vittoria Guarino, Emilie Capron, Irene Malmierca-Vallet, Joy S. Singarayer, Louise C. Sime, Daniel J. Lunt, and Paul J. Valdes
Clim. Past, 16, 1429–1450, https://doi.org/10.5194/cp-16-1429-2020, https://doi.org/10.5194/cp-16-1429-2020, 2020
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Computer simulations of the geological past are an important tool to improve our understanding of climate change. We present results from two simulations using the latest version of the UK's climate model, the mid-Holocene (6000 years ago) and Last Interglacial (127 000 years ago). The simulations reproduce temperatures consistent with the pattern of incoming radiation. Model–data comparisons indicate that some regions (and some seasons) produce better matches to the data than others.
This article is included in the Encyclopedia of Geosciences
Kirsty M. Edgar, Steven M. Bohaty, Helen K. Coxall, Paul R. Bown, Sietske J. Batenburg, Caroline H. Lear, and Paul N. Pearson
J. Micropalaeontol., 39, 117–138, https://doi.org/10.5194/jm-39-117-2020, https://doi.org/10.5194/jm-39-117-2020, 2020
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We identify the first continuous carbonate-bearing sediment record from the tropical ocean that spans the entirety of the global warming event, the Middle Eocene Climatic Optimum, ca. 40 Ma. We determine significant mismatches between middle Eocene calcareous microfossil datums from the tropical Pacific Ocean and established low-latitude zonation schemes. We highlight the potential of ODP Site 865 for future investigations into environmental and biotic changes throughout the early Paleogene.
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Yurui Zhang, Thierry Huck, Camille Lique, Yannick Donnadieu, Jean-Baptiste Ladant, Marina Rabineau, and Daniel Aslanian
Clim. Past, 16, 1263–1283, https://doi.org/10.5194/cp-16-1263-2020, https://doi.org/10.5194/cp-16-1263-2020, 2020
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The early Eocene (~ 55 Ma) was an extreme warm period accompanied by a high atmospheric CO2 level. We explore the relationships between ocean dynamics and this warm climate with the aid of the IPSL climate model. Our results show that the Eocene was characterized by a strong overturning circulation associated with deepwater formation in the Southern Ocean, which is analogous to the present-day North Atlantic. Consequently, poleward ocean heat transport was strongly enhanced.
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Pierre Sepulchre, Arnaud Caubel, Jean-Baptiste Ladant, Laurent Bopp, Olivier Boucher, Pascale Braconnot, Patrick Brockmann, Anne Cozic, Yannick Donnadieu, Jean-Louis Dufresne, Victor Estella-Perez, Christian Ethé, Frédéric Fluteau, Marie-Alice Foujols, Guillaume Gastineau, Josefine Ghattas, Didier Hauglustaine, Frédéric Hourdin, Masa Kageyama, Myriam Khodri, Olivier Marti, Yann Meurdesoif, Juliette Mignot, Anta-Clarisse Sarr, Jérôme Servonnat, Didier Swingedouw, Sophie Szopa, and Delphine Tardif
Geosci. Model Dev., 13, 3011–3053, https://doi.org/10.5194/gmd-13-3011-2020, https://doi.org/10.5194/gmd-13-3011-2020, 2020
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Our paper describes IPSL-CM5A2, an Earth system model that can be integrated for long (several thousands of years) climate simulations. We describe the technical aspects, assess the model computing performance and evaluate the strengths and weaknesses of the model, by comparing pre-industrial and historical runs to the previous-generation model simulations and to observations. We also present a Cretaceous simulation as a case study to show how the model simulates deep-time paleoclimates.
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Jean-Baptiste Ladant, Christopher J. Poulsen, Frédéric Fluteau, Clay R. Tabor, Kenneth G. MacLeod, Ellen E. Martin, Shannon J. Haynes, and Masoud A. Rostami
Clim. Past, 16, 973–1006, https://doi.org/10.5194/cp-16-973-2020, https://doi.org/10.5194/cp-16-973-2020, 2020
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Understanding of the role of ocean circulation on climate is contingent on the ability to reconstruct its modes and evolution. Here, we show that earth system model simulations of the Late Cretaceous predict major changes in ocean circulation as a result of paleogeographic and gateway evolution. Comparisons of model results with available data compilations demonstrate reasonable agreement but highlight that various plausible theories of ocean circulation change coexist during this period.
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Marie Laugié, Yannick Donnadieu, Jean-Baptiste Ladant, J. A. Mattias Green, Laurent Bopp, and François Raisson
Clim. Past, 16, 953–971, https://doi.org/10.5194/cp-16-953-2020, https://doi.org/10.5194/cp-16-953-2020, 2020
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To quantify the impact of major climate forcings on the Cretaceous climate, we use Earth system modelling to progressively reconstruct the Cretaceous state by changing boundary conditions one by one. Between the preindustrial and the Cretaceous simulations, the model simulates a global warming of more than 11°C. The study confirms the primary control exerted by atmospheric CO2 on atmospheric temperatures. Palaeogeographic changes represent the second major contributor to the warming.
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Delphine Tardif, Frédéric Fluteau, Yannick Donnadieu, Guillaume Le Hir, Jean-Baptiste Ladant, Pierre Sepulchre, Alexis Licht, Fernando Poblete, and Guillaume Dupont-Nivet
Clim. Past, 16, 847–865, https://doi.org/10.5194/cp-16-847-2020, https://doi.org/10.5194/cp-16-847-2020, 2020
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The Asian monsoons onset has been suggested to be as early as 40 Ma, in a palaeogeographic and climatic context very different from modern conditions. We test the likeliness of an early monsoon onset through climatic modelling. Our results reveal a very arid central Asia and several regions in India, Myanmar and eastern China experiencing highly seasonal precipitations. This suggests that monsoon circulation is not paramount in triggering the highly seasonal patterns recorded in the fossils.
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Zhongshi Zhang, Qing Yan, Ran Zhang, Florence Colleoni, Gilles Ramstein, Gaowen Dai, Martin Jakobsson, Matt O'Regan, Stefan Liess, Denis-Didier Rousseau, Naiqing Wu, Elizabeth J. Farmer, Camille Contoux, Chuncheng Guo, Ning Tan, and Zhengtang Guo
Clim. Past Discuss., https://doi.org/10.5194/cp-2020-38, https://doi.org/10.5194/cp-2020-38, 2020
Manuscript not accepted for further review
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Whether an ice sheet once grew over Northeast Siberia-Beringia has been debated for decades. By comparing climate modelling with paleoclimate and glacial records from around the North Pacific, this study shows that the Laurentide-Eurasia-only ice sheet configuration fails in explaining these records, while a scenario involving the ice sheet over Northeast Siberia-Beringia succeeds. It highlights the complexity in glacial climates and urges new investigations across Northeast Siberia-Beringia.
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Alan T. Kennedy-Asser, Daniel J. Lunt, Paul J. Valdes, Jean-Baptiste Ladant, Joost Frieling, and Vittoria Lauretano
Clim. Past, 16, 555–573, https://doi.org/10.5194/cp-16-555-2020, https://doi.org/10.5194/cp-16-555-2020, 2020
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Global cooling and a major expansion of ice over Antarctica occurred ~ 34 million years ago at the Eocene–Oligocene transition (EOT). A large secondary proxy dataset for high-latitude Southern Hemisphere temperature before, after and across the EOT is compiled and compared to simulations from two coupled climate models. Although there are inconsistencies between the models and data, the comparison shows amongst other things that changes in the Drake Passage were unlikely the cause of the EOT.
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Xiangyu Li, Chuncheng Guo, Zhongshi Zhang, Odd Helge Otterå, and Ran Zhang
Clim. Past, 16, 183–197, https://doi.org/10.5194/cp-16-183-2020, https://doi.org/10.5194/cp-16-183-2020, 2020
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Here we report the PlioMIP2 simulations by two versions of the Norwegian Earth System Model (NorESM) with updated boundary conditions derived from Pliocene Research, Interpretation and Synoptic Mapping version 4. The two NorESM versions both produce warmer and wetter Pliocene climate with deeper and stronger Atlantic meridional overturning circulation. Compared to PlioMIP1, PlioMIP2 simulates lower Pliocene warming with NorESM-L, likely due to the closure of seaways at northern high latitudes.
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Gabriel J. Bowen, Brenden Fischer-Femal, Gert-Jan Reichart, Appy Sluijs, and Caroline H. Lear
Clim. Past, 16, 65–78, https://doi.org/10.5194/cp-16-65-2020, https://doi.org/10.5194/cp-16-65-2020, 2020
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Past climate conditions are reconstructed using indirect and incomplete geological, biological, and geochemical proxy data. We propose that such reconstructions are best obtained by statistical inversion of hierarchical models that represent how multi–proxy observations and calibration data are produced by variation of environmental conditions in time and/or space. These methods extract new information from traditional proxies and provide robust, comprehensive estimates of uncertainty.
This article is included in the Encyclopedia of Geosciences
Christian Berndt, Sverre Planke, Damon Teagle, Ritske Huismans, Trond Torsvik, Joost Frieling, Morgan T. Jones, Dougal A. Jerram, Christian Tegner, Jan Inge Faleide, Helen Coxall, and Wei-Li Hong
Sci. Dril., 26, 69–85, https://doi.org/10.5194/sd-26-69-2019, https://doi.org/10.5194/sd-26-69-2019, 2019
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The northeast Atlantic encompasses archetypal examples of volcanic rifted margins. Twenty-five years after the last ODP leg on these volcanic margins, the reasons for excess melting are still disputed with at least three competing hypotheses being discussed. We are proposing a new drilling campaign that will constrain the timing, rates of volcanism, and vertical movements of rifted margins.
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Kasia K. Śliwińska
J. Micropalaeontol., 38, 143–176, https://doi.org/10.5194/jm-38-143-2019, https://doi.org/10.5194/jm-38-143-2019, 2019
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This study provides an age model based on dinocysts for the early Oligocene succession from the North Sea. The changes in the dinocysts assemblage show that the succession was deposited in a proximal and dynamic environment. Furthermore, the results suggests that the early icehouse climate played an important role in the depositional development of the Oligocene succession in the North Sea basin.
This article is included in the Encyclopedia of Geosciences
Christopher J. Hollis, Tom Dunkley Jones, Eleni Anagnostou, Peter K. Bijl, Marlow Julius Cramwinckel, Ying Cui, Gerald R. Dickens, Kirsty M. Edgar, Yvette Eley, David Evans, Gavin L. Foster, Joost Frieling, Gordon N. Inglis, Elizabeth M. Kennedy, Reinhard Kozdon, Vittoria Lauretano, Caroline H. Lear, Kate Littler, Lucas Lourens, A. Nele Meckler, B. David A. Naafs, Heiko Pälike, Richard D. Pancost, Paul N. Pearson, Ursula Röhl, Dana L. Royer, Ulrich Salzmann, Brian A. Schubert, Hannu Seebeck, Appy Sluijs, Robert P. Speijer, Peter Stassen, Jessica Tierney, Aradhna Tripati, Bridget Wade, Thomas Westerhold, Caitlyn Witkowski, James C. Zachos, Yi Ge Zhang, Matthew Huber, and Daniel J. Lunt
Geosci. Model Dev., 12, 3149–3206, https://doi.org/10.5194/gmd-12-3149-2019, https://doi.org/10.5194/gmd-12-3149-2019, 2019
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The Deep-Time Model Intercomparison Project (DeepMIP) is a model–data intercomparison of the early Eocene (around 55 million years ago), the last time that Earth's atmospheric CO2 concentrations exceeded 1000 ppm. Previously, we outlined the experimental design for climate model simulations. Here, we outline the methods used for compilation and analysis of climate proxy data. The resulting climate
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atlaswill provide insights into the mechanisms that control past warm climate states.
Chuncheng Guo, Kerim H. Nisancioglu, Mats Bentsen, Ingo Bethke, and Zhongshi Zhang
Clim. Past, 15, 1133–1151, https://doi.org/10.5194/cp-15-1133-2019, https://doi.org/10.5194/cp-15-1133-2019, 2019
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We present an equilibrium simulation of the climate of Marine Isotope Stage 3, with an IPCC-class model with a relatively high model resolution and a long integration. The simulated climate resembles a warm interstadial state, as indicated by reconstructions of Greenland temperature, sea ice extent, and AMOC. Sensitivity experiments to changes in atmospheric CO2 levels and ice sheet size show that the model is in a relatively stable climate state without multiple equilibria.
This article is included in the Encyclopedia of Geosciences
Eleanor Rainsley, Chris S. M. Turney, Nicholas R. Golledge, Janet M. Wilmshurst, Matt S. McGlone, Alan G. Hogg, Bo Li, Zoë A. Thomas, Richard Roberts, Richard T. Jones, Jonathan G. Palmer, Verity Flett, Gregory de Wet, David K. Hutchinson, Mathew J. Lipson, Pavla Fenwick, Ben R. Hines, Umberto Binetti, and Christopher J. Fogwill
Clim. Past, 15, 423–448, https://doi.org/10.5194/cp-15-423-2019, https://doi.org/10.5194/cp-15-423-2019, 2019
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The New Zealand subantarctic islands, in the Pacific sector of the Southern Ocean, provide valuable records of past environmental change. We find that the Auckland Islands hosted a small ice cap around 384 000 years ago, but that there was little glaciation during the Last Glacial Maximum, around 21 000 years ago, in contrast to mainland New Zealand. This shows that the climate here is susceptible to changes in regional factors such as sea-ice expanse and the position of ocean fronts.
This article is included in the Encyclopedia of Geosciences
Mark M. Dekker, Anna S. von der Heydt, and Henk A. Dijkstra
Earth Syst. Dynam., 9, 1243–1260, https://doi.org/10.5194/esd-9-1243-2018, https://doi.org/10.5194/esd-9-1243-2018, 2018
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We introduce a framework of cascading tipping, i.e. a sequence of abrupt transitions occurring because a transition in one system affects the background conditions of another system. Using bifurcation theory, various types of these events are considered and early warning indicators are suggested. An illustration of such an event is found in a conceptual model, coupling the North Atlantic Ocean with the equatorial Pacific. This demonstrates the possibility of events such as this in nature.
This article is included in the Encyclopedia of Geosciences
Florence Sylvestre, Mathieu Schuster, Hendrik Vogel, Moussa Abdheramane, Daniel Ariztegui, Ulrich Salzmann, Antje Schwalb, Nicolas Waldmann, and the ICDP CHADRILL Consortium
Sci. Dril., 24, 71–78, https://doi.org/10.5194/sd-24-71-2018, https://doi.org/10.5194/sd-24-71-2018, 2018
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CHADRILL aims to recover a sedimentary core spanning the Miocene–Pleistocene sediment succession of Lake Chad through deep drilling. This record will provide significant insights into the modulation of orbitally forced changes in northern African hydroclimate under different climate boundary conditions and the most continuous climatic and environmental record to be compared with hominid migrations across northern Africa and the implications for understanding human evolution.
This article is included in the Encyclopedia of Geosciences
Isabel S. Fenton, Ulrike Baranowski, Flavia Boscolo-Galazzo, Hannah Cheales, Lyndsey Fox, David J. King, Christina Larkin, Marcin Latas, Diederik Liebrand, C. Giles Miller, Katrina Nilsson-Kerr, Emanuela Piga, Hazel Pugh, Serginio Remmelzwaal, Zoe A. Roseby, Yvonne M. Smith, Stephen Stukins, Ben Taylor, Adam Woodhouse, Savannah Worne, Paul N. Pearson, Christopher R. Poole, Bridget S. Wade, and Andy Purvis
J. Micropalaeontol., 37, 431–443, https://doi.org/10.5194/jm-37-431-2018, https://doi.org/10.5194/jm-37-431-2018, 2018
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In this study we investigate consistency in species-level identifications and whether disagreements are predictable. Twenty-three scientists identified a set of 100 planktonic foraminifera, noting their confidence in each identification. The median accuracy of students was 57 %; 79 % for experienced researchers. Where they were confident in the identifications, the values are 75 % and 93 %, respectively. Accuracy was significantly higher if the students had been taught how to identify species.
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Ariadna Salabarnada, Carlota Escutia, Ursula Röhl, C. Hans Nelson, Robert McKay, Francisco J. Jiménez-Espejo, Peter K. Bijl, Julian D. Hartman, Stephanie L. Strother, Ulrich Salzmann, Dimitris Evangelinos, Adrián López-Quirós, José Abel Flores, Francesca Sangiorgi, Minoru Ikehara, and Henk Brinkhuis
Clim. Past, 14, 991–1014, https://doi.org/10.5194/cp-14-991-2018, https://doi.org/10.5194/cp-14-991-2018, 2018
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Here we reconstruct ice sheet and paleoceanographic configurations in the East Antarctic Wilkes Land margin based on a multi-proxy study conducted in late Oligocene (26–25 Ma) sediments from IODP Site U1356. The new obliquity-forced glacial–interglacial sedimentary model shows that, under the high CO2 values of the late Oligocene, ice sheets had mostly retreated to their terrestrial margins and the ocean was very dynamic with shifting positions of the polar fronts and associated water masses.
This article is included in the Encyclopedia of Geosciences
Zhongshi Zhang, Qing Yan, Elizabeth J. Farmer, Camille Li, Gilles Ramstein, Terence Hughes, Martin Jakobsson, Matt O'Regan, Ran Zhang, Ning Tan, Camille Contoux, Christophe Dumas, and Chuncheng Guo
Clim. Past Discuss., https://doi.org/10.5194/cp-2018-79, https://doi.org/10.5194/cp-2018-79, 2018
Revised manuscript not accepted
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Our study challenges the widely accepted idea that the Laurentide-Eurasian ice sheets gradually extended across North America and Northwest Eurasia, and suggests the growth of the NH ice sheets is much more complicated. We find climate feedbacks regulate the distribution of the NH ice sheets, producing swings between two distinct ice sheet configurations: the Laurentide-Eurasian and a circum-Arctic configuration, where large ice sheets existed over Northeast Siberia and the Canadian Rockies.
This article is included in the Encyclopedia of Geosciences
David K. Hutchinson, Agatha M. de Boer, Helen K. Coxall, Rodrigo Caballero, Johan Nilsson, and Michiel Baatsen
Clim. Past, 14, 789–810, https://doi.org/10.5194/cp-14-789-2018, https://doi.org/10.5194/cp-14-789-2018, 2018
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The Eocene--Oligocene transition was a major cooling event 34 million years ago. Climate model studies of this transition have used low ocean resolution or topography that roughly approximates the time period. We present a new climate model simulation of the late Eocene, with higher ocean resolution and topography which is accurately designed for this time period. These features improve the ocean circulation and gateways which are thought to be important for this climate transition.
This article is included in the Encyclopedia of Geosciences
Michiel Baatsen, Anna S. von der Heydt, Matthew Huber, Michael A. Kliphuis, Peter K. Bijl, Appy Sluijs, and Henk A. Dijkstra
Clim. Past Discuss., https://doi.org/10.5194/cp-2018-43, https://doi.org/10.5194/cp-2018-43, 2018
Revised manuscript not accepted
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The Eocene marks a period where the climate was in a hothouse state, without any continental-scale ice sheets. Such climates have proven difficult to reproduce in models, especially their low temperature difference between equator and poles. Here, we present high resolution CESM simulations using a new geographic reconstruction of the middle-to-late Eocene. The results provide new insights into a period for which knowledge is limited, leading up to a transition into the present icehouse state.
This article is included in the Encyclopedia of Geosciences
Masa Kageyama, Pascale Braconnot, Sandy P. Harrison, Alan M. Haywood, Johann H. Jungclaus, Bette L. Otto-Bliesner, Jean-Yves Peterschmitt, Ayako Abe-Ouchi, Samuel Albani, Patrick J. Bartlein, Chris Brierley, Michel Crucifix, Aisling Dolan, Laura Fernandez-Donado, Hubertus Fischer, Peter O. Hopcroft, Ruza F. Ivanovic, Fabrice Lambert, Daniel J. Lunt, Natalie M. Mahowald, W. Richard Peltier, Steven J. Phipps, Didier M. Roche, Gavin A. Schmidt, Lev Tarasov, Paul J. Valdes, Qiong Zhang, and Tianjun Zhou
Geosci. Model Dev., 11, 1033–1057, https://doi.org/10.5194/gmd-11-1033-2018, https://doi.org/10.5194/gmd-11-1033-2018, 2018
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The Paleoclimate Modelling Intercomparison Project (PMIP) takes advantage of the existence of past climate states radically different from the recent past to test climate models used for climate projections and to better understand these climates. This paper describes the PMIP contribution to CMIP6 (Coupled Model Intercomparison Project, 6th phase) and possible analyses based on PMIP results, as well as on other CMIP6 projects.
This article is included in the Encyclopedia of Geosciences
Paul N. Pearson and IODP Expedition 363 Shipboard Scientific
Party
J. Micropalaeontol., 37, 97–104, https://doi.org/10.5194/jm-37-97-2018, https://doi.org/10.5194/jm-37-97-2018, 2018
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We describe an unusual millimetre-long tube that was discovered in sediment from the deep sea floor. The tube was made by a single-celled organism by cementing together sedimentary grains from its environment. The specimen is unusual because it implies that the organism used a very high degree of discrimination in selecting its grains, as they are all of one type and most are oriented the same way. It raises intriguing questions of how the organism accomplished this activity.
This article is included in the Encyclopedia of Geosciences
Natalie S. Lord, Michel Crucifix, Dan J. Lunt, Mike C. Thorne, Nabila Bounceur, Harry Dowsett, Charlotte L. O'Brien, and Andy Ridgwell
Clim. Past, 13, 1539–1571, https://doi.org/10.5194/cp-13-1539-2017, https://doi.org/10.5194/cp-13-1539-2017, 2017
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We present projections of long-term changes in climate, produced using a statistical emulator based on climate data from a state-of-the-art climate model. We use the emulator to model changes in temperature and precipitation over the late Pliocene (3.3–2.8 million years before present) and the next 200 thousand years. The impact of the Earth's orbit and the atmospheric carbon dioxide concentration on climate is assessed, and the data for the late Pliocene are compared to proxy temperature data.
This article is included in the Encyclopedia of Geosciences
Gary Shaffer, Esteban Fernández Villanueva, Roberto Rondanelli, Jens Olaf Pepke Pedersen, Steffen Malskær Olsen, and Matthew Huber
Geosci. Model Dev., 10, 4081–4103, https://doi.org/10.5194/gmd-10-4081-2017, https://doi.org/10.5194/gmd-10-4081-2017, 2017
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We include methane cycling in the simplified but well-tested Danish Center for Earth System Science model. We now can deal with very large methane inputs to the Earth system that can lead to more methane in the atmosphere, extreme warming and ocean dead zones. We can now study ancient global warming events, probably forced by methane inputs. Some such events were accompanied by mass extinctions. We wish to understand such events, both for learning about the past and for looking into the future.
This article is included in the Encyclopedia of Geosciences
Bette L. Otto-Bliesner, Pascale Braconnot, Sandy P. Harrison, Daniel J. Lunt, Ayako Abe-Ouchi, Samuel Albani, Patrick J. Bartlein, Emilie Capron, Anders E. Carlson, Andrea Dutton, Hubertus Fischer, Heiko Goelzer, Aline Govin, Alan Haywood, Fortunat Joos, Allegra N. LeGrande, William H. Lipscomb, Gerrit Lohmann, Natalie Mahowald, Christoph Nehrbass-Ahles, Francesco S. R. Pausata, Jean-Yves Peterschmitt, Steven J. Phipps, Hans Renssen, and Qiong Zhang
Geosci. Model Dev., 10, 3979–4003, https://doi.org/10.5194/gmd-10-3979-2017, https://doi.org/10.5194/gmd-10-3979-2017, 2017
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The PMIP4 and CMIP6 mid-Holocene and Last Interglacial simulations provide an opportunity to examine the impact of two different changes in insolation forcing on climate at times when other forcings were relatively similar to present. This will allow exploration of the role of feedbacks relevant to future projections. Evaluating these simulations using paleoenvironmental data will provide direct out-of-sample tests of the reliability of state-of-the-art models to simulate climate changes.
This article is included in the Encyclopedia of Geosciences
Masa Kageyama, Samuel Albani, Pascale Braconnot, Sandy P. Harrison, Peter O. Hopcroft, Ruza F. Ivanovic, Fabrice Lambert, Olivier Marti, W. Richard Peltier, Jean-Yves Peterschmitt, Didier M. Roche, Lev Tarasov, Xu Zhang, Esther C. Brady, Alan M. Haywood, Allegra N. LeGrande, Daniel J. Lunt, Natalie M. Mahowald, Uwe Mikolajewicz, Kerim H. Nisancioglu, Bette L. Otto-Bliesner, Hans Renssen, Robert A. Tomas, Qiong Zhang, Ayako Abe-Ouchi, Patrick J. Bartlein, Jian Cao, Qiang Li, Gerrit Lohmann, Rumi Ohgaito, Xiaoxu Shi, Evgeny Volodin, Kohei Yoshida, Xiao Zhang, and Weipeng Zheng
Geosci. Model Dev., 10, 4035–4055, https://doi.org/10.5194/gmd-10-4035-2017, https://doi.org/10.5194/gmd-10-4035-2017, 2017
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The Last Glacial Maximum (LGM, 21000 years ago) is an interval when global ice volume was at a maximum, eustatic sea level close to a minimum, greenhouse gas concentrations were lower, atmospheric aerosol loadings were higher than today, and vegetation and land-surface characteristics were different from today. This paper describes the implementation of the LGM numerical experiment for the PMIP4-CMIP6 modelling intercomparison projects and the associated sensitivity experiments.
This article is included in the Encyclopedia of Geosciences
Paul J. Valdes, Edward Armstrong, Marcus P. S. Badger, Catherine D. Bradshaw, Fran Bragg, Michel Crucifix, Taraka Davies-Barnard, Jonathan J. Day, Alex Farnsworth, Chris Gordon, Peter O. Hopcroft, Alan T. Kennedy, Natalie S. Lord, Dan J. Lunt, Alice Marzocchi, Louise M. Parry, Vicky Pope, William H. G. Roberts, Emma J. Stone, Gregory J. L. Tourte, and Jonny H. T. Williams
Geosci. Model Dev., 10, 3715–3743, https://doi.org/10.5194/gmd-10-3715-2017, https://doi.org/10.5194/gmd-10-3715-2017, 2017
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In this paper we describe the family of climate models used by the BRIDGE research group at the University of Bristol as well as by various other institutions. These models are based on the UK Met Office HadCM3 models and here we describe the various modifications which have been made as well as the key features of a number of configurations in use.
This article is included in the Encyclopedia of Geosciences
Martin Jakobsson, Christof Pearce, Thomas M. Cronin, Jan Backman, Leif G. Anderson, Natalia Barrientos, Göran Björk, Helen Coxall, Agatha de Boer, Larry A. Mayer, Carl-Magnus Mörth, Johan Nilsson, Jayne E. Rattray, Christian Stranne, Igor Semiletov, and Matt O'Regan
Clim. Past, 13, 991–1005, https://doi.org/10.5194/cp-13-991-2017, https://doi.org/10.5194/cp-13-991-2017, 2017
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The Arctic and Pacific oceans are connected by the presently ~53 m deep Bering Strait. During the last glacial period when the sea level was lower than today, the Bering Strait was exposed. Humans and animals could then migrate between Asia and North America across the formed land bridge. From analyses of sediment cores and geophysical mapping data from Herald Canyon north of the Bering Strait, we show that the land bridge was flooded about 11 000 years ago.
This article is included in the Encyclopedia of Geosciences
Jack Longman, Daniel Veres, Vasile Ersek, Ulrich Salzmann, Katalin Hubay, Marc Bormann, Volker Wennrich, and Frank Schäbitz
Clim. Past, 13, 897–917, https://doi.org/10.5194/cp-13-897-2017, https://doi.org/10.5194/cp-13-897-2017, 2017
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We present the first record of dust input into an eastern European bog over the past 10 800 years. We find significant changes in past dust deposition, with large inputs related to both natural and human influences. We show evidence that Saharan desertification has had a significant impact on dust deposition in eastern Europe for the past 6100 years.
This article is included in the Encyclopedia of Geosciences
Stephanie L. Strother, Ulrich Salzmann, Francesca Sangiorgi, Peter K. Bijl, Jörg Pross, Carlota Escutia, Ariadna Salabarnada, Matthew J. Pound, Jochen Voss, and John Woodward
Biogeosciences, 14, 2089–2100, https://doi.org/10.5194/bg-14-2089-2017, https://doi.org/10.5194/bg-14-2089-2017, 2017
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One of the main challenges in Antarctic vegetation reconstructions is the uncertainty in unambiguously identifying reworked pollen and spore assemblages in marine sedimentary records influenced by waxing and waning ice sheets. This study uses red fluorescence and digital imaging as a new tool to identify reworking in a marine sediment core from circum-Antarctic waters to reconstruct Cenozoic climate change and vegetation with high confidence.
This article is included in the Encyclopedia of Geosciences
Rosanna Greenop, Mathis P. Hain, Sindia M. Sosdian, Kevin I. C. Oliver, Philip Goodwin, Thomas B. Chalk, Caroline H. Lear, Paul A. Wilson, and Gavin L. Foster
Clim. Past, 13, 149–170, https://doi.org/10.5194/cp-13-149-2017, https://doi.org/10.5194/cp-13-149-2017, 2017
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Understanding the boron isotopic composition of seawater (δ11Bsw) is key to calculating absolute estimates of CO2 using the boron isotope pH proxy. Here we use the boron isotope gradient, along with an estimate of pH gradient, between the surface and deep ocean to show that the δ11Bsw varies by ~ 2 ‰ over the past 23 million years. This new record has implications for both δ11Bsw and CO2 records and understanding changes in the ocean isotope composition of a number of ions through time.
This article is included in the Encyclopedia of Geosciences
Daniel J. Lunt, Matthew Huber, Eleni Anagnostou, Michiel L. J. Baatsen, Rodrigo Caballero, Rob DeConto, Henk A. Dijkstra, Yannick Donnadieu, David Evans, Ran Feng, Gavin L. Foster, Ed Gasson, Anna S. von der Heydt, Chris J. Hollis, Gordon N. Inglis, Stephen M. Jones, Jeff Kiehl, Sandy Kirtland Turner, Robert L. Korty, Reinhardt Kozdon, Srinath Krishnan, Jean-Baptiste Ladant, Petra Langebroek, Caroline H. Lear, Allegra N. LeGrande, Kate Littler, Paul Markwick, Bette Otto-Bliesner, Paul Pearson, Christopher J. Poulsen, Ulrich Salzmann, Christine Shields, Kathryn Snell, Michael Stärz, James Super, Clay Tabor, Jessica E. Tierney, Gregory J. L. Tourte, Aradhna Tripati, Garland R. Upchurch, Bridget S. Wade, Scott L. Wing, Arne M. E. Winguth, Nicky M. Wright, James C. Zachos, and Richard E. Zeebe
Geosci. Model Dev., 10, 889–901, https://doi.org/10.5194/gmd-10-889-2017, https://doi.org/10.5194/gmd-10-889-2017, 2017
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In this paper we describe the experimental design for a set of simulations which will be carried out by a range of climate models, all investigating the climate of the Eocene, about 50 million years ago. The intercomparison of model results is called 'DeepMIP', and we anticipate that we will contribute to the next IPCC report through an analysis of these simulations and the geological data to which we will compare them.
This article is included in the Encyclopedia of Geosciences
Louise C. Sime, Dominic Hodgson, Thomas J. Bracegirdle, Claire Allen, Bianca Perren, Stephen Roberts, and Agatha M. de Boer
Clim. Past, 12, 2241–2253, https://doi.org/10.5194/cp-12-2241-2016, https://doi.org/10.5194/cp-12-2241-2016, 2016
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Latitudinal shifts in the Southern Ocean westerly wind jet could explain large observed changes in the glacial to interglacial ocean CO2 inventory. However there is considerable disagreement in modelled deglacial-warming jet shifts. Here multi-model output is used to show that expansion of sea ice during the glacial period likely caused a slight poleward shift and intensification in the westerly wind jet. Issues with model representation of the winds caused much of the previous disagreement.
This article is included in the Encyclopedia of Geosciences
Bette L. Otto-Bliesner, Pascale Braconnot, Sandy P. Harrison, Daniel J. Lunt, Ayako Abe-Ouchi, Samuel Albani, Patrick J. Bartlein, Emilie Capron, Anders E. Carlson, Andrea Dutton, Hubertus Fischer, Heiko Goelzer, Aline Govin, Alan Haywood, Fortunat Joos, Allegra N. Legrande, William H. Lipscomb, Gerrit Lohmann, Natalie Mahowald, Christoph Nehrbass-Ahles, Jean-Yves Peterschmidt, Francesco S.-R. Pausata, Steven Phipps, and Hans Renssen
Clim. Past Discuss., https://doi.org/10.5194/cp-2016-106, https://doi.org/10.5194/cp-2016-106, 2016
Preprint retracted
Emma J. Stone, Emilie Capron, Daniel J. Lunt, Antony J. Payne, Joy S. Singarayer, Paul J. Valdes, and Eric W. Wolff
Clim. Past, 12, 1919–1932, https://doi.org/10.5194/cp-12-1919-2016, https://doi.org/10.5194/cp-12-1919-2016, 2016
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Climate models forced only with greenhouse gas concentrations and orbital parameters representative of the early Last Interglacial are unable to reproduce the observed colder-than-present temperatures in the North Atlantic and the warmer-than-present temperatures in the Southern Hemisphere. Using a climate model forced also with a freshwater amount derived from data representing melting from the remnant Northern Hemisphere ice sheets accounts for this response via the bipolar seesaw mechanism.
This article is included in the Encyclopedia of Geosciences
Michiel Baatsen, Douwe J. J. van Hinsbergen, Anna S. von der Heydt, Henk A. Dijkstra, Appy Sluijs, Hemmo A. Abels, and Peter K. Bijl
Clim. Past, 12, 1635–1644, https://doi.org/10.5194/cp-12-1635-2016, https://doi.org/10.5194/cp-12-1635-2016, 2016
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One of the major difficulties in modelling palaeoclimate is constricting the boundary conditions, causing significant discrepancies between different studies. Here, a new method is presented to automate much of the process of generating the necessary geographical reconstructions. The latter can be made using various rotational frameworks and topography/bathymetry input, allowing for easy inter-comparisons and the incorporation of the latest insights from geoscientific research.
This article is included in the Encyclopedia of Geosciences
Harry Dowsett, Aisling Dolan, David Rowley, Robert Moucha, Alessandro M. Forte, Jerry X. Mitrovica, Matthew Pound, Ulrich Salzmann, Marci Robinson, Mark Chandler, Kevin Foley, and Alan Haywood
Clim. Past, 12, 1519–1538, https://doi.org/10.5194/cp-12-1519-2016, https://doi.org/10.5194/cp-12-1519-2016, 2016
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Past intervals in Earth history provide unique windows into conditions much different than those observed today. We investigated the paleoenvironments of a past warm interval (~ 3 million years ago). Our reconstruction includes data sets for surface temperature, vegetation, soils, lakes, ice sheets, topography, and bathymetry. These data are being used along with global climate models to expand our understanding of the climate system and to help us prepare for future changes.
This article is included in the Encyclopedia of Geosciences
Daniel J. Lunt, Alex Farnsworth, Claire Loptson, Gavin L. Foster, Paul Markwick, Charlotte L. O'Brien, Richard D. Pancost, Stuart A. Robinson, and Neil Wrobel
Clim. Past, 12, 1181–1198, https://doi.org/10.5194/cp-12-1181-2016, https://doi.org/10.5194/cp-12-1181-2016, 2016
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We explore the influence of changing geography from the period ~ 150 million years ago to ~ 35 million years ago, using a set of 19 climate model simulations. We find that without any CO2 change, the global mean temperature is remarkably constant, but that regionally there are significant changes in temperature which we link back to changes in ocean circulation. Finally, we explore the implications of our findings for the interpretation of geological indicators of past temperatures.
This article is included in the Encyclopedia of Geosciences
Oliver Friedrich, Sietske J. Batenburg, Kazuyoshi Moriya, Silke Voigt, Cécile Cournède, Iris Möbius, Peter Blum, André Bornemann, Jens Fiebig, Takashi Hasegawa, Pincelli M. Hull, Richard D. Norris, Ursula Röhl, Thomas Westerhold, Paul A. Wilson, and IODP Expedition
Clim. Past Discuss., https://doi.org/10.5194/cp-2016-51, https://doi.org/10.5194/cp-2016-51, 2016
Manuscript not accepted for further review
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A lack of knowledge on the timing of Late Cretaceous climatic change inhibits our understanding of underlying causal mechanisms. Therefore, we used an expanded deep ocean record from the North Atlantic that shows distinct sedimentary cyclicity suggesting orbital forcing. A high-resolution carbon-isotope record from bulk carbonates allows to identify global trends in the carbon cycle. Our new carbon isotope record and the established cyclostratigraphy may serve as a future reference site.
This article is included in the Encyclopedia of Geosciences
Sina Panitz, Ulrich Salzmann, Bjørg Risebrobakken, Stijn De Schepper, and Matthew J. Pound
Clim. Past, 12, 1043–1060, https://doi.org/10.5194/cp-12-1043-2016, https://doi.org/10.5194/cp-12-1043-2016, 2016
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This paper presents the first late Pliocene high-resolution pollen record for the Norwegian Arctic, covering the time period 3.60 to 3.14 million years ago (Ma). The climate of the late Pliocene has been widely regarded as relatively stable. Our results suggest a high climate variability with alternating cool temperate forests during warmer-than-presen periods and boreal forests similar to today during cooler intervals. A spread of peatlands at the expense of forest indicates long-term cooling.
This article is included in the Encyclopedia of Geosciences
Willem P. Sijp, Anna S. von der Heydt, and Peter K. Bijl
Clim. Past, 12, 807–817, https://doi.org/10.5194/cp-12-807-2016, https://doi.org/10.5194/cp-12-807-2016, 2016
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The timing and role in ocean circulation and climate of the opening of Southern Ocean gateways is as yet elusive. Here, we present the first model results specific to the early-to-middle Eocene where, in agreement with the field evidence, a southerly shallow opening of the Tasman Gateway does indeed cause a westward flow across the Tasman Gateway, in agreement with recent micropalaeontological studies.
This article is included in the Encyclopedia of Geosciences
Fergus W. Howell, Alan M. Haywood, Bette L. Otto-Bliesner, Fran Bragg, Wing-Le Chan, Mark A. Chandler, Camille Contoux, Youichi Kamae, Ayako Abe-Ouchi, Nan A. Rosenbloom, Christian Stepanek, and Zhongshi Zhang
Clim. Past, 12, 749–767, https://doi.org/10.5194/cp-12-749-2016, https://doi.org/10.5194/cp-12-749-2016, 2016
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Simulations of pre-industrial and mid-Pliocene Arctic sea ice by eight GCMs are analysed. Ensemble variability in sea ice extent is greater in the mid-Pliocene summer, when half of the models simulate sea-ice-free conditions. Weaker correlations are seen between sea ice extent and temperatures in the pre-industrial era compared to the mid-Pliocene. The need for more comprehensive sea ice proxy data is highlighted, in order to better compare model performances.
This article is included in the Encyclopedia of Geosciences
Alan M. Haywood, Harry J. Dowsett, Aisling M. Dolan, David Rowley, Ayako Abe-Ouchi, Bette Otto-Bliesner, Mark A. Chandler, Stephen J. Hunter, Daniel J. Lunt, Matthew Pound, and Ulrich Salzmann
Clim. Past, 12, 663–675, https://doi.org/10.5194/cp-12-663-2016, https://doi.org/10.5194/cp-12-663-2016, 2016
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Our paper presents the experimental design for the second phase of the Pliocene Model Intercomparison Project (PlioMIP). We outline the way in which climate models should be set up in order to study the Pliocene – a period of global warmth in Earth's history which is relevant for our understanding of future climate change. By conducting a model intercomparison we hope to understand the uncertainty associated with model predictions of a warmer climate.
This article is included in the Encyclopedia of Geosciences
Peter Köhler, Lennert B. Stap, Anna S. von der Heydt, Bas de Boer, and Roderik S. W. van de Wal
Clim. Past Discuss., https://doi.org/10.5194/cp-2016-23, https://doi.org/10.5194/cp-2016-23, 2016
Revised manuscript not accepted
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Evidence indicate that specific equilibrium climate sensitivity, the global annual mean surface temperature change as a response to a change in radiative forcing, is state dependent. We here show that the interpretation of data in the state-dependent case is not straightforward. We analyse the differences of a point-wise approach and one based on a piece-wise linear analysis, combine both, compare with potential model results and apply the theoretical concepts to data of the last 800 kyr.
This article is included in the Encyclopedia of Geosciences
Willem P. Sijp and Matthew H. England
Clim. Past, 12, 543–552, https://doi.org/10.5194/cp-12-543-2016, https://doi.org/10.5194/cp-12-543-2016, 2016
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The polar warmth of the greenhouse climates in the Earth's past represents a fundamentally different climate state to that of today, with a strongly reduced temperature difference between the Equator and the poles. It is commonly thought that this would lead to a more quiescent ocean, with much reduced ventilation of the abyss. Surprisingly, using a Cretaceous cimate model, we find that ocean overturning is not weaker under a reduced temperature gradient arising from amplified polar heat.
This article is included in the Encyclopedia of Geosciences
Matthew J. Carmichael, Daniel J. Lunt, Matthew Huber, Malte Heinemann, Jeffrey Kiehl, Allegra LeGrande, Claire A. Loptson, Chris D. Roberts, Navjit Sagoo, Christine Shields, Paul J. Valdes, Arne Winguth, Cornelia Winguth, and Richard D. Pancost
Clim. Past, 12, 455–481, https://doi.org/10.5194/cp-12-455-2016, https://doi.org/10.5194/cp-12-455-2016, 2016
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In this paper, we assess how well model-simulated precipitation rates compare to those indicated by geological data for the early Eocene, a warm interval 56–49 million years ago. Our results show that a number of models struggle to produce sufficient precipitation at high latitudes, which likely relates to cool simulated temperatures in these regions. However, calculating precipitation rates from plant fossils is highly uncertain, and further data are now required.
This article is included in the Encyclopedia of Geosciences
Margret Steinthorsdottir, Amanda S. Porter, Aidan Holohan, Lutz Kunzmann, Margaret Collinson, and Jennifer C. McElwain
Clim. Past, 12, 439–454, https://doi.org/10.5194/cp-12-439-2016, https://doi.org/10.5194/cp-12-439-2016, 2016
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Our manuscript "Fossil plant stomata indicate decreasing atmospheric CO2 prior to the Eocene–Oligocene boundary" reports that ~ 40 % decrease in pCO2 preceded the large shift in marine oxygen isotope records that characterizes the Eocene–Oliogocene climate transition. The results endorse the theory that pCO2 drawdown was the main forcer of the Eocene–Oligocene climate change, and a "tipping point" was reached in the latest Eocene, triggering the plunge of the Earth System into icehouse conditions.
This article is included in the Encyclopedia of Geosciences
P. Köhler, B. de Boer, A. S. von der Heydt, L. B. Stap, and R. S. W. van de Wal
Clim. Past, 11, 1801–1823, https://doi.org/10.5194/cp-11-1801-2015, https://doi.org/10.5194/cp-11-1801-2015, 2015
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We find that the specific equilibrium climate sensitivity due to radiative forcing of CO2 and land ice albedo has been state-dependent for the last 2.1Myr (most of the Pleistocene). Its value is ~45% larger during intermediate glaciated climates and interglacial periods than during Pleistocene full glacial conditions. The state dependency is mainly caused by a latitudinal dependency in ice sheet area changes. Due to uncertainties in CO2, firm conclusions for the Pliocene are not yet possible.
This article is included in the Encyclopedia of Geosciences
A. Marzocchi, D. J. Lunt, R. Flecker, C. D. Bradshaw, A. Farnsworth, and F. J. Hilgen
Clim. Past, 11, 1271–1295, https://doi.org/10.5194/cp-11-1271-2015, https://doi.org/10.5194/cp-11-1271-2015, 2015
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This paper investigates the climatic response to orbital forcing through the analysis of an ensemble of simulations covering a late Miocene precession cycle. Including orbital variability in our model–data comparison reduces the mismatch between the proxy record and model output. Our results indicate that ignoring orbital variability could lead to miscorrelations in proxy reconstructions. The North African summer monsoon's sensitivity is high to orbits, moderate to paleogeography and low to CO2.
This article is included in the Encyclopedia of Geosciences
O. Friedrich, R. D. Norris, P. A. Wilson, and B. N. Opdyke
Sci. Dril., 19, 39–42, https://doi.org/10.5194/sd-19-39-2015, https://doi.org/10.5194/sd-19-39-2015, 2015
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This workshop brought together specialists from various fields to develop a drilling proposal to fill the “Oligo-Miocene Gap” that exists in our understanding of the functions of Earth’s systems. We propose to establish the first continuous high-deposition record of the Oligo-Miocene through International Ocean Discovery Program (IODP) drilling in the North Atlantic. We give a short overview of the major topics discussed during the workshop and the scientific goals of the resulting pre-proposal.
This article is included in the Encyclopedia of Geosciences
S. J. Koenig, A. M. Dolan, B. de Boer, E. J. Stone, D. J. Hill, R. M. DeConto, A. Abe-Ouchi, D. J. Lunt, D. Pollard, A. Quiquet, F. Saito, J. Savage, and R. van de Wal
Clim. Past, 11, 369–381, https://doi.org/10.5194/cp-11-369-2015, https://doi.org/10.5194/cp-11-369-2015, 2015
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The paper assess the Greenland Ice Sheet’s sensitivity to a warm period in the past, a time when atmospheric CO2 concentrations were comparable to current levels. We quantify ice sheet volume and locations in Greenland and find that the ice sheets are less sensitive to differences in ice sheet model configurations than to changes in imposed climate forcing. We conclude that Pliocene ice was most likely to be limited to highest elevations in eastern and southern Greenland.
This article is included in the Encyclopedia of Geosciences
A. M. Dolan, S. J. Hunter, D. J. Hill, A. M. Haywood, S. J. Koenig, B. L. Otto-Bliesner, A. Abe-Ouchi, F. Bragg, W.-L. Chan, M. A. Chandler, C. Contoux, A. Jost, Y. Kamae, G. Lohmann, D. J. Lunt, G. Ramstein, N. A. Rosenbloom, L. Sohl, C. Stepanek, H. Ueda, Q. Yan, and Z. Zhang
Clim. Past, 11, 403–424, https://doi.org/10.5194/cp-11-403-2015, https://doi.org/10.5194/cp-11-403-2015, 2015
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Climate and ice sheet models are often used to predict the nature of ice sheets in Earth history. It is important to understand whether such predictions are consistent among different models, especially in warm periods of relevance to the future. We use input from 15 different climate models to run one ice sheet model and compare the predictions over Greenland. We find that there are large differences between the predicted ice sheets for the warm Pliocene (c. 3 million years ago).
This article is included in the Encyclopedia of Geosciences
J. R. Buzan, K. Oleson, and M. Huber
Geosci. Model Dev., 8, 151–170, https://doi.org/10.5194/gmd-8-151-2015, https://doi.org/10.5194/gmd-8-151-2015, 2015
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We implemented the HumanIndexMod, which calculates 13 diagnostic heat stress metrics, into the Community Land Model (CLM4.5). The goal of this module is to have a common predictive framework for measuring heat stress globally. These metrics are in operational use by weather forecasters, industry, and agriculture. We show metric-dependent results of regional partitioning of extreme moisture and temperature levels in a 1901-2010 simulation.
This article is included in the Encyclopedia of Geosciences
P. N. Pearson and E. Thomas
Clim. Past, 11, 95–104, https://doi.org/10.5194/cp-11-95-2015, https://doi.org/10.5194/cp-11-95-2015, 2015
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The Paleocene-to-Eocene thermal maximum was a period of extreme global warming caused by perturbation to the global carbon cycle 56Mya. Evidence from marine sediment cores has been used to suggest that the onset of the event was very rapid, over just 11 years of annually resolved sedimentation. However, we argue that the supposed annual layers are an artifact caused by drilling disturbance, and that the microfossil content of the cores shows the onset took in the order of thousands of years.
This article is included in the Encyclopedia of Geosciences
Paul N. Pearson, Sam L. Evans, and James Evans
J. Micropalaeontol., 34, 59–64, https://doi.org/10.1144/jmpaleo2013-032, https://doi.org/10.1144/jmpaleo2013-032, 2015
P. N. Pearson and W. Hudson
Sci. Dril., 18, 13–17, https://doi.org/10.5194/sd-18-13-2014, https://doi.org/10.5194/sd-18-13-2014, 2014
J.-B. Ladant, Y. Donnadieu, and C. Dumas
Clim. Past, 10, 1957–1966, https://doi.org/10.5194/cp-10-1957-2014, https://doi.org/10.5194/cp-10-1957-2014, 2014
N. Herold, J. Buzan, M. Seton, A. Goldner, J. A. M. Green, R. D. Müller, P. Markwick, and M. Huber
Geosci. Model Dev., 7, 2077–2090, https://doi.org/10.5194/gmd-7-2077-2014, https://doi.org/10.5194/gmd-7-2077-2014, 2014
T. Westerhold, U. Röhl, H. Pälike, R. Wilkens, P. A. Wilson, and G. Acton
Clim. Past, 10, 955–973, https://doi.org/10.5194/cp-10-955-2014, https://doi.org/10.5194/cp-10-955-2014, 2014
U. Schuster, A. J. Watson, D. C. E. Bakker, A. M. de Boer, E. M. Jones, G. A. Lee, O. Legge, A. Louwerse, J. Riley, and S. Scally
Earth Syst. Sci. Data, 6, 175–183, https://doi.org/10.5194/essd-6-175-2014, https://doi.org/10.5194/essd-6-175-2014, 2014
A. Goldner, N. Herold, and M. Huber
Clim. Past, 10, 523–536, https://doi.org/10.5194/cp-10-523-2014, https://doi.org/10.5194/cp-10-523-2014, 2014
E. Gasson, D. J. Lunt, R. DeConto, A. Goldner, M. Heinemann, M. Huber, A. N. LeGrande, D. Pollard, N. Sagoo, M. Siddall, A. Winguth, and P. J. Valdes
Clim. Past, 10, 451–466, https://doi.org/10.5194/cp-10-451-2014, https://doi.org/10.5194/cp-10-451-2014, 2014
C. A. Loptson, D. J. Lunt, and J. E. Francis
Clim. Past, 10, 419–436, https://doi.org/10.5194/cp-10-419-2014, https://doi.org/10.5194/cp-10-419-2014, 2014
M. J. Pound, J. Tindall, S. J. Pickering, A. M. Haywood, H. J. Dowsett, and U. Salzmann
Clim. Past, 10, 167–180, https://doi.org/10.5194/cp-10-167-2014, https://doi.org/10.5194/cp-10-167-2014, 2014
D. J. Hill, A. M. Haywood, D. J. Lunt, S. J. Hunter, F. J. Bragg, C. Contoux, C. Stepanek, L. Sohl, N. A. Rosenbloom, W.-L. Chan, Y. Kamae, Z. Zhang, A. Abe-Ouchi, M. A. Chandler, A. Jost, G. Lohmann, B. L. Otto-Bliesner, G. Ramstein, and H. Ueda
Clim. Past, 10, 79–90, https://doi.org/10.5194/cp-10-79-2014, https://doi.org/10.5194/cp-10-79-2014, 2014
P. J. Irvine, L. J. Gregoire, D. J. Lunt, and P. J. Valdes
Geosci. Model Dev., 6, 1447–1462, https://doi.org/10.5194/gmd-6-1447-2013, https://doi.org/10.5194/gmd-6-1447-2013, 2013
R. Zhang, Q. Yan, Z. S. Zhang, D. Jiang, B. L. Otto-Bliesner, A. M. Haywood, D. J. Hill, A. M. Dolan, C. Stepanek, G. Lohmann, C. Contoux, F. Bragg, W.-L. Chan, M. A. Chandler, A. Jost, Y. Kamae, A. Abe-Ouchi, G. Ramstein, N. A. Rosenbloom, L. Sohl, and H. Ueda
Clim. Past, 9, 2085–2099, https://doi.org/10.5194/cp-9-2085-2013, https://doi.org/10.5194/cp-9-2085-2013, 2013
W. Zheng, Z. Zhang, L. Chen, and Y. Yu
Geosci. Model Dev., 6, 1127–1135, https://doi.org/10.5194/gmd-6-1127-2013, https://doi.org/10.5194/gmd-6-1127-2013, 2013
Z.-S. Zhang, K. H. Nisancioglu, M. A. Chandler, A. M. Haywood, B. L. Otto-Bliesner, G. Ramstein, C. Stepanek, A. Abe-Ouchi, W.-L. Chan, F. J. Bragg, C. Contoux, A. M. Dolan, D. J. Hill, A. Jost, Y. Kamae, G. Lohmann, D. J. Lunt, N. A. Rosenbloom, L. E. Sohl, and H. Ueda
Clim. Past, 9, 1495–1504, https://doi.org/10.5194/cp-9-1495-2013, https://doi.org/10.5194/cp-9-1495-2013, 2013
D. J. Lunt, A. Abe-Ouchi, P. Bakker, A. Berger, P. Braconnot, S. Charbit, N. Fischer, N. Herold, J. H. Jungclaus, V. C. Khon, U. Krebs-Kanzow, P. M. Langebroek, G. Lohmann, K. H. Nisancioglu, B. L. Otto-Bliesner, W. Park, M. Pfeiffer, S. J. Phipps, M. Prange, R. Rachmayani, H. Renssen, N. Rosenbloom, B. Schneider, E. J. Stone, K. Takahashi, W. Wei, Q. Yin, and Z. S. Zhang
Clim. Past, 9, 699–717, https://doi.org/10.5194/cp-9-699-2013, https://doi.org/10.5194/cp-9-699-2013, 2013
E. J. Stone, D. J. Lunt, J. D. Annan, and J. C. Hargreaves
Clim. Past, 9, 621–639, https://doi.org/10.5194/cp-9-621-2013, https://doi.org/10.5194/cp-9-621-2013, 2013
P. Bakker, E. J. Stone, S. Charbit, M. Gröger, U. Krebs-Kanzow, S. P. Ritz, V. Varma, V. Khon, D. J. Lunt, U. Mikolajewicz, M. Prange, H. Renssen, B. Schneider, and M. Schulz
Clim. Past, 9, 605–619, https://doi.org/10.5194/cp-9-605-2013, https://doi.org/10.5194/cp-9-605-2013, 2013
A. M. Haywood, D. J. Hill, A. M. Dolan, B. L. Otto-Bliesner, F. Bragg, W.-L. Chan, M. A. Chandler, C. Contoux, H. J. Dowsett, A. Jost, Y. Kamae, G. Lohmann, D. J. Lunt, A. Abe-Ouchi, S. J. Pickering, G. Ramstein, N. A. Rosenbloom, U. Salzmann, L. Sohl, C. Stepanek, H. Ueda, Q. Yan, and Z. Zhang
Clim. Past, 9, 191–209, https://doi.org/10.5194/cp-9-191-2013, https://doi.org/10.5194/cp-9-191-2013, 2013
A. Goldner, M. Huber, and R. Caballero
Clim. Past, 9, 173–189, https://doi.org/10.5194/cp-9-173-2013, https://doi.org/10.5194/cp-9-173-2013, 2013
R. L. Sriver, M. Huber, and L. Chafik
Earth Syst. Dynam., 4, 1–10, https://doi.org/10.5194/esd-4-1-2013, https://doi.org/10.5194/esd-4-1-2013, 2013
A. S. von der Heydt, A. Nnafie, and H. A. Dijkstra
Clim. Past, 7, 903–915, https://doi.org/10.5194/cp-7-903-2011, https://doi.org/10.5194/cp-7-903-2011, 2011
M. Tigchelaar, A. S. von der Heydt, and H. A. Dijkstra
Clim. Past, 7, 235–247, https://doi.org/10.5194/cp-7-235-2011, https://doi.org/10.5194/cp-7-235-2011, 2011
Related subject area
Subject: Climate Modelling | Archive: Marine Archives | Timescale: Cenozoic
Climate variability, heat distribution, and polar amplification in the warm unipolar “icehouse” of the Oligocene
The role of atmospheric CO2 in controlling sea surface temperature change during the Pliocene
Bayesian multi-proxy reconstruction of early Eocene latitudinal temperature gradients
Resilient Antarctic monsoonal climate prevented ice growth during the Eocene
Amplified surface warming in the south-west Pacific during the mid-Pliocene (3.3–3.0 Ma) and future implications
Sea surface temperature evolution of the North Atlantic Ocean across the Eocene–Oligocene transition
DeepMIP: model intercomparison of early Eocene climatic optimum (EECO) large-scale climate features and comparison with proxy data
The middle to late Eocene greenhouse climate modelled using the CESM 1.0.5
Sensitivity of Pliocene climate simulations in MRI-CGCM2.3 to respective boundary conditions
Could the Pliocene constrain the equilibrium climate sensitivity?
Palaeogeographic controls on climate and proxy interpretation
On the effect of orbital forcing on mid-Pliocene climate, vegetation and ice sheets
Large-scale features of Pliocene climate: results from the Pliocene Model Intercomparison Project
A model–data comparison for a multi-model ensemble of early Eocene atmosphere–ocean simulations: EoMIP
Dominique K. L. L. Jenny, Tammo Reichgelt, Charlotte L. O'Brien, Xiaoqing Liu, Peter K. Bijl, Matthew Huber, and Appy Sluijs
Clim. Past, 20, 1627–1657, https://doi.org/10.5194/cp-20-1627-2024, https://doi.org/10.5194/cp-20-1627-2024, 2024
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This study reviews the current state of knowledge regarding the Oligocene
This article is included in the Encyclopedia of Geosciences
icehouseclimate. We extend an existing marine climate proxy data compilation and present a new compilation and analysis of terrestrial plant assemblages to assess long-term climate trends and variability. Our data–climate model comparison reinforces the notion that models underestimate polar amplification of Oligocene climates, and we identify potential future research directions.
Lauren E. Burton, Alan M. Haywood, Julia C. Tindall, Aisling M. Dolan, Daniel J. Hill, Erin L. McClymont, Sze Ling Ho, and Heather L. Ford
Clim. Past, 20, 1177–1194, https://doi.org/10.5194/cp-20-1177-2024, https://doi.org/10.5194/cp-20-1177-2024, 2024
Short summary
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The Pliocene (~ 3 million years ago) is of interest because its warm climate is similar to projections of the future. We explore the role of atmospheric carbon dioxide in forcing sea surface temperature during the Pliocene by combining climate model outputs with palaeoclimate proxy data. We investigate whether this role changes seasonally and also use our data to suggest a new estimate of Pliocene climate sensitivity. More data are needed to further explore the results presented.
This article is included in the Encyclopedia of Geosciences
Kilian Eichenseer and Lewis A. Jones
Clim. Past, 20, 349–362, https://doi.org/10.5194/cp-20-349-2024, https://doi.org/10.5194/cp-20-349-2024, 2024
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Large-scale palaeoclimate reconstructions are often based on sparse and unevenly sampled records, inviting potential biases. Here, we present a Bayesian hierarchical model that combines geochemical with ecological proxy data to model the latitudinal sea surface temperature gradient. Applying this model to the early Eocene climatic optimum highlights how our integrated approach can improve palaeoclimate reconstructions from datasets with limited sampling.
This article is included in the Encyclopedia of Geosciences
Michiel Baatsen, Peter Bijl, Anna von der Heydt, Appy Sluijs, and Henk Dijkstra
Clim. Past, 20, 77–90, https://doi.org/10.5194/cp-20-77-2024, https://doi.org/10.5194/cp-20-77-2024, 2024
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This work introduces the possibility and consequences of monsoons on Antarctica in the warm Eocene climate. We suggest that such a monsoonal climate can be important to understand conditions in Antarctica prior to large-scale glaciation. We can explain seemingly contradictory indications of ice and vegetation on the continent through regional variability. In addition, we provide a new mechanism through which most of Antarctica remained ice-free through a wide range of global climatic changes.
This article is included in the Encyclopedia of Geosciences
Georgia R. Grant, Jonny H. T. Williams, Sebastian Naeher, Osamu Seki, Erin L. McClymont, Molly O. Patterson, Alan M. Haywood, Erik Behrens, Masanobu Yamamoto, and Katelyn Johnson
Clim. Past, 19, 1359–1381, https://doi.org/10.5194/cp-19-1359-2023, https://doi.org/10.5194/cp-19-1359-2023, 2023
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Regional warming will differ from global warming, and climate models perform poorly in the Southern Ocean. We reconstruct sea surface temperatures in the south-west Pacific during the mid-Pliocene, a time 3 million years ago that represents the long-term outcomes of 3 °C warming, which is expected for the future. Comparing these results to climate model simulations, we show that the south-west Pacific region will warm by 1 °C above the global average if atmospheric CO2 remains above 350 ppm.
This article is included in the Encyclopedia of Geosciences
Kasia K. Śliwińska, Helen K. Coxall, David K. Hutchinson, Diederik Liebrand, Stefan Schouten, and Agatha M. de Boer
Clim. Past, 19, 123–140, https://doi.org/10.5194/cp-19-123-2023, https://doi.org/10.5194/cp-19-123-2023, 2023
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We provide a sea surface temperature record from the Labrador Sea (ODP Site 647) based on organic geochemical proxies across the late Eocene and early Oligocene. Our study reveals heterogenic cooling of the Atlantic. The cooling of the North Atlantic is difficult to reconcile with the active Atlantic Meridional Overturning Circulation (AMOC). We discuss possible explanations like uncertainty in the data, paleogeography and atmospheric CO2 boundary conditions, model weaknesses, and AMOC activity.
This article is included in the Encyclopedia of Geosciences
Daniel J. Lunt, Fran Bragg, Wing-Le Chan, David K. Hutchinson, Jean-Baptiste Ladant, Polina Morozova, Igor Niezgodzki, Sebastian Steinig, Zhongshi Zhang, Jiang Zhu, Ayako Abe-Ouchi, Eleni Anagnostou, Agatha M. de Boer, Helen K. Coxall, Yannick Donnadieu, Gavin Foster, Gordon N. Inglis, Gregor Knorr, Petra M. Langebroek, Caroline H. Lear, Gerrit Lohmann, Christopher J. Poulsen, Pierre Sepulchre, Jessica E. Tierney, Paul J. Valdes, Evgeny M. Volodin, Tom Dunkley Jones, Christopher J. Hollis, Matthew Huber, and Bette L. Otto-Bliesner
Clim. Past, 17, 203–227, https://doi.org/10.5194/cp-17-203-2021, https://doi.org/10.5194/cp-17-203-2021, 2021
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This paper presents the first modelling results from the Deep-Time Model Intercomparison Project (DeepMIP), in which we focus on the early Eocene climatic optimum (EECO, 50 million years ago). We show that, in contrast to previous work, at least three models (CESM, GFDL, and NorESM) produce climate states that are consistent with proxy indicators of global mean temperature and polar amplification, and they achieve this at a CO2 concentration that is consistent with the CO2 proxy record.
This article is included in the Encyclopedia of Geosciences
Michiel Baatsen, Anna S. von der Heydt, Matthew Huber, Michael A. Kliphuis, Peter K. Bijl, Appy Sluijs, and Henk A. Dijkstra
Clim. Past, 16, 2573–2597, https://doi.org/10.5194/cp-16-2573-2020, https://doi.org/10.5194/cp-16-2573-2020, 2020
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Warm climates of the deep past have proven to be challenging to reconstruct with the same numerical models used for future predictions. We present results of CESM simulations for the middle to late Eocene (∼ 38 Ma), in which we managed to match the available indications of temperature well. With these results we can now look into regional features and the response to external changes to ultimately better understand the climate when it is in such a warm state.
This article is included in the Encyclopedia of Geosciences
Youichi Kamae, Kohei Yoshida, and Hiroaki Ueda
Clim. Past, 12, 1619–1634, https://doi.org/10.5194/cp-12-1619-2016, https://doi.org/10.5194/cp-12-1619-2016, 2016
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Climate model simulations conducted in previous studies tended to underestimate the late-Pliocene higher-latitude warming suggested by proxy evidences. We explore how prescribed trace gases, ice sheets, vegetation, lakes and orography affect the Pliocene climate simulation based on a protocol of the PlioMIP Phase 2. The revised boundary forcing data lead to amplified higher-latitude warming that is qualitatively consistent with the paleoenvironment reconstructions.
This article is included in the Encyclopedia of Geosciences
J. C. Hargreaves and J. D. Annan
Clim. Past, 12, 1591–1599, https://doi.org/10.5194/cp-12-1591-2016, https://doi.org/10.5194/cp-12-1591-2016, 2016
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The mid-Pliocene Warm Period, 3 million years ago, was the most recent interval with high greenhouse gases. By modelling the period with the same models used for future projections, we can link the past and future climates. Here we use data from the mid-Pliocene to produce a tentative result for equilibrium climate sensitivity. We show that there are considerable uncertainties that strongly influence the result, but we are optimistic that these may be reduced in the next few years.
This article is included in the Encyclopedia of Geosciences
Daniel J. Lunt, Alex Farnsworth, Claire Loptson, Gavin L. Foster, Paul Markwick, Charlotte L. O'Brien, Richard D. Pancost, Stuart A. Robinson, and Neil Wrobel
Clim. Past, 12, 1181–1198, https://doi.org/10.5194/cp-12-1181-2016, https://doi.org/10.5194/cp-12-1181-2016, 2016
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We explore the influence of changing geography from the period ~ 150 million years ago to ~ 35 million years ago, using a set of 19 climate model simulations. We find that without any CO2 change, the global mean temperature is remarkably constant, but that regionally there are significant changes in temperature which we link back to changes in ocean circulation. Finally, we explore the implications of our findings for the interpretation of geological indicators of past temperatures.
This article is included in the Encyclopedia of Geosciences
M. Willeit, A. Ganopolski, and G. Feulner
Clim. Past, 9, 1749–1759, https://doi.org/10.5194/cp-9-1749-2013, https://doi.org/10.5194/cp-9-1749-2013, 2013
A. M. Haywood, D. J. Hill, A. M. Dolan, B. L. Otto-Bliesner, F. Bragg, W.-L. Chan, M. A. Chandler, C. Contoux, H. J. Dowsett, A. Jost, Y. Kamae, G. Lohmann, D. J. Lunt, A. Abe-Ouchi, S. J. Pickering, G. Ramstein, N. A. Rosenbloom, U. Salzmann, L. Sohl, C. Stepanek, H. Ueda, Q. Yan, and Z. Zhang
Clim. Past, 9, 191–209, https://doi.org/10.5194/cp-9-191-2013, https://doi.org/10.5194/cp-9-191-2013, 2013
D. J. Lunt, T. Dunkley Jones, M. Heinemann, M. Huber, A. LeGrande, A. Winguth, C. Loptson, J. Marotzke, C. D. Roberts, J. Tindall, P. Valdes, and C. Winguth
Clim. Past, 8, 1717–1736, https://doi.org/10.5194/cp-8-1717-2012, https://doi.org/10.5194/cp-8-1717-2012, 2012
Cited articles
Abels, H. A., Dupont-Nivet, G., Xiao, G., Bosboom, R., and Krijgsman, W.: Step-wise
change of Asian interior climate preceding the Eocene–Oligocene Transition (EOT),
Palaeogeogr. Palaeoclimatol. Palaeoecol., 299, 399–412, https://doi.org/10.1016/j.palaeo.2010.11.028, 2011.
Abelson, M. and Erez, J.: The onset of modern-like Atlantic meridional overturning
circulation at the Eocene-Oligocene transition: Evidence, causes, and possible implications for
global cooling, Geochem. Geophy. Geosy., 18, 2177–2199, https://doi.org/10.1002/2017GC006826, 2017.
Adams, C. G., Butterlin, J., and Samanta, B. K.: Larger Foraminifera and Events at the
Eocene/Oligocene Boundary in the Indo-West Pacific Region, in: terminal eocene events, vol. 9,
edited by: Pomerol, C., Premoli-Silva, S., Elsevier, Amsterdam, the Netherlands, 237–252, 1986.
Agnini, C., Fornaciari, E., Raffi, I., Catanzariti, R., Pälike, H., Backman, J., and
Rio, D.: Biozonation and biochronology of Paleogene calcareous nannofossils from low and middle
latitudes, Newslett. Stratigr., 47, 131–181, https://doi.org/10.1127/0078-0421/2014/0042, 2014.
Agnini, C., Backman, J., Boscolo-Galazzo, F., Condon, D. J., Fornaciari, E., Galeotti,
S., Giusberti, L., Grandesso, P., Lanci, L., Luciani, V., Monechi, S., Muttoni, G., Pälike,
H., Letizia Pampaloni, M., Papazzoni, C. A., Pearson, P. N., Pignatti, J., Premoli Silva, I.,
Raffi, I., Rio, D., Rook, L., Sahy, D., Spofforth, D. J. A., Stefani, C., and Wade, B. S.:
Proposal for the Global Boundary Stratotype Section and Point (GSSP) for the Priabonian Stage
(Eocene) at the Alano section (Italy), Episodes, https://doi.org/10.18814/epiiugs/2020/020074, online first, 2020.
Akhmetiev, M. A. and Beniamovski, V. N.: Paleogene floral assemblages around
epicontinental seas and straits in Northern Central Eurasia: proxies for climatic and
paleogeographic evolution, Geol. Acta, 7, 297–309, https://doi.org/10.1344/105.000000278, 2009.
Anagnostou, E., John, E. H., Edgar, K. M., Foster, G. L., Ridgwell, A., Inglis, G. N.,
Pancost, R. D., Lunt, D. J., and Pearson, P. N.: Changing atmospheric CO2 concentration was the
primary driver of early Cenozoic climate, Nature, 533, 380–384, https://doi.org/10.1038/nature17423, 2016.
Anderson, J. B., Warny, S., Askin, R. A., Wellner, J. S., Bohaty, S. M., Kirshner,
A. E., Livsey, D. N., Simms, A. R., Smith, T. R., Ehrmann, W., Lawver, L. A., Barbeau, D., Wise,
S. W., Kulhanek, D. K., Weaver, F. M., and Majewski, W.: Progressive Cenozoic cooling and the
demise of Antarctica's last refugium, P. Natl. Acad. Sci. USA, 108, 11356–11360,
https://doi.org/10.1073/pnas.1014885108, 2011.
Armstrong McKay, D. I., Tyrrell, T., and Wilson, P. A.: Global carbon cycle perturbation
across the Eocene-Oligocene climate transition, Paleoceanography, 31, 311–329,
https://doi.org/10.1002/2015PA002818, 2016.
Baatsen, M., van Hinsbergen, D. J. J., von der Heydt, A. S., Dijkstra, H. A., Sluijs, A., Abels, H. A., and Bijl, P. K.: Reconstructing geographical boundary conditions for palaeoclimate modelling during the Cenozoic, Clim. Past, 12, 1635–1644, https://doi.org/10.5194/cp-12-1635-2016, 2016.
Baatsen, M., von der Heydt, A. S., Huber, M., Kliphuis, M. A., Bijl, P. K., Sluijs, A., and Dijkstra, H. A.: The middle-to-late Eocene greenhouse climate, modelled using the CESM 1.0.5, Clim. Past Discuss., https://doi.org/10.5194/cp-2020-29, in review, 2020.
Baatsen, M. L. J., von der Heydt, A. S., Kliphuis, M., Viebahn, J., and Dijkstra,
H. A.: Multiple states in the late Eocene ocean circulation, Glob. Planet. Change, 163, 18–28,
https://doi.org/10.1016/j.gloplacha.2018.02.009, 2018.
Bailey, I., Hole, G. M., Foster, G. L., Wilson, P. A., Storey, C. D., Trueman, C. N.,
and Raymo, M. E.: An alternative suggestion for the Pliocene onset of major northern hemisphere
glaciation based on the geochemical provenance of North Atlantic Ocean ice-rafted debris,
Quat. Sci. Rev., 75, 181–194, https://doi.org/10.1016/j.quascirev.2013.06.004, 2013.
Barker, P. F. and Burrell, J.: The opening of Drake Passage, Mar. Geol., 25, 15–34,
https://doi.org/10.1016/0025-3227(77)90045-7, 1977.
Barker, P. F. and Thomas, E.: Origin, signature and palaeoclimatic influence of the
Antarctic Circumpolar Current, Earth-Science Rev., 66, 143–162,
https://doi.org/10.1016/j.earscirev.2003.10.003, 2004.
Barker, P. F., Filippelli, G. M., Florindo, F., Martin, E. E., and Scher, H. D.: Onset
and role of the Antarctic Circumpolar Current, Deep-Sea Res. Pt II, 54, 2388–2398,
https://doi.org/10.1016/j.dsr2.2007.07.028, 2007.
Barreda, V. and Palazzesi, L.: Patagonian Vegetation Turnovers during the
Paleogene-Early Neogene: Origin of Arid-Adapted Floras, Bot. Rev., 73, 31–50,
2007.
Basak, C. and Martin, E. E.: Antarctic weathering and carbonate compensation at the
Eocene–Oligocene transition, Nat. Geosci., 6, 121, https://doi.org/10.1038/ngeo1707, 2013.
Beerling, D. J.: Preface to Vegetation-climate-atmosphere interactions: past, present
and future, the proceedings of a Discussion Meeting held at the Royal Society,
Philos. Trans. R. Soc. B-Biol. Sci., 353, 3–4, https://doi.org/10.1098/rstb.1998.0185, 1998.
Beerling, D. J. and Royer, D. L.: Convergent Cenozoic CO2 history,
Nat. Geosci., 4, 418, https://doi.org/10.1038/ngeo1186, 2011.
Beerling, D. J., Fox, A., Stevenson, D. S., and Valdes, P. J.: Enhanced
chemistry-climate feedbacks in past greenhouse worlds, P. Natl. Acad. Sci. USA, 108, 9770–9775,
https://doi.org/10.1073/pnas.1102409108, 2011.
Berggren, W. A. and Pearson, P. N.: A Revised Tropical to Subtropical Paleogene
Planktonic Foraminiferal Zonation, J. Foraminifer. Res., 35, 279–298, https://doi.org/10.2113/35.4.279,
2005.
Berggren, W. A., Wade, B. S., and Pearson, P. N.: Oligocene chronostratigraphy and
planktonic foraminiferal biostratigraphy: Historical review and current state-of-the-art, in:
Atlas of Oligocene Planktonic Foraminifera, edited by: Wade, B. S., Olsson, R. K., Pearson, P. N.,
Huber, B. T., and Berggren, W. A., Cushman Foundation for Foraminiferal Research, Lawrence, USA,
29–54, 2018.
Bernard, T., Steer, P., Gallagher, K., Szulc, A., Whitham, A., and Johnson, C.:
Evidence for Eocene–Oligocene glaciation in the landscape of the East Greenland margin, Geology,
44, 895–898, https://doi.org/10.1130/G38248.1, 2016.
Berner, R. A. and Kothavala, Z.: GEOCARB III: a revised model of atmospheric CO2 over
Phanerozoic time, Am. J. Sci., 301, 182–204, https://doi.org/10.2475/ajs.301.2.182, 2001.
Bierman, P. R., Shakun, J. D., Corbett, L. B., Zimmerman, S. R., and Rood, D. H.: A
persistent and dynamic East Greenland Ice Sheet over the past 7.5 million years, Nature, 540, 256,
https://doi.org/10.1038/nature20147, 2016.
Bijl, P. K., Schouten, S., Sluijs, A., Reichart, G.-J., Zachos, J. C., and Brinkhuis,
H.: Early Palaeogene temperature evolution of the southwest Pacific Ocean, Nature, 461, 776–779,
https://doi.org/10.1038/nature08399, 2009.
Bijl, P. K., Bendle, J. A. P., Bohaty, S. M., Pross, J., Schouten, S., Tauxe, L.,
Stickley, C. E., McKay, R. M., Röhl, U., Olney, M., Sluijs, A., Escutia, C., Brinkhuis, H.,
and Scientists, E. 318: Eocene cooling linked to early flow across the Tasmanian Gateway,
P. Natl. Acad. Sci. USA, 110, 9645–9650, https://doi.org/10.1073/pnas.1220872110, 2013.
Billups, K. and Schrag, D. P.: Application of benthic foraminiferal Mg ∕ Ca ratios to
questions of Cenozoic climate change, Earth Planet. Sci. Lett., 209, 181–195,
https://doi.org/10.1016/S0012-821X(03)00067-0, 2003.
Blaj, T., Backman, J., and Raffi, I.: Late Eocene to Oligocene preservation history and
biochronology of calcareous nannofossils from paleo-equatorial Pacific Ocean sediments,
Riv. Ital. Paleontol. Stratigr., 115, 67–85,
https://doi.org/10.13130/2039-4942/5920, 2009.
Bo, S., Siegert, M. J., Mudd, S. M., Sugden, D., Fujita, S., Xiangbin, C., Yunyun, J.,
Xueyuan, T., and Yuansheng, L.: The Gamburtsev mountains and the origin and early evolution of the
Antarctic Ice Sheet, Nature, 459, 690, https://doi.org/10.1038/nature08024, 2009.
Boardman, G. S. and Secord, R.: Stable isotope paleoecology of White River ungulates
during the Eocene–Oligocene climate transition in northwestern Nebraska,
Palaeogeogr. Palaeoclimatol. Palaeoecol., 375, 38–49,
https://doi.org/10.1016/j.palaeo.2013.02.010, 2013.
Bohaty, S. M. and Zachos, J. C.: Significant Southern Ocean warming event in the late
middle Eocene, Geology, 31, 1017–1020, https://doi.org/10.1130/G19800.1, 2003.
Bohaty, S. M., Zachos, J. C., and Delaney, M. L.: Foraminiferal Mg ∕ Ca evidence for
Southern Ocean cooling across the Eocene–Oligocene transition, Earth Planet. Sci. Lett.,
317–318, 251–261, https://doi.org/10.1016/j.epsl.2011.11.037, 2012.
Borrelli, C., Cramer, B. S., and Katz, M. E.: Bipolar Atlantic deepwater circulation in
the middle-late Eocene: Effects of Southern Ocean gateway openings, Paleoceanography, 29,
308–327, https://doi.org/10.1002/2012PA002444, 2014.
Botsyun, S., Sepulchre, P., Donnadieu, Y., Risi, C., Licht, A., and Caves Rugenstein,
J. K.: Revised paleoaltimetry data show low Tibetan Plateau elevation during the Eocene, Science,
363, eaaq1436, https://doi.org/10.1126/science.aaq1436, 2019.
Boyden, J. A., Müller, R. D., Gurnis, M., Torsvik, T. H., Clark, J. A., Turner, M.,
Ivey-Law, H., Watson, R. J., and Cannon, J. S.: Next-generation plate-tectonic reconstructions
using GPlates, in Geoinformatics: Cyberinfrastructure for the Solid Earth Sciences, edited by:
Keller, G. R. and Baru, C., Cambridge University Press, Cambridge, UK, 95–114, 2011.
Boyle, P. R., Romans, B. W., Tucholke, B. E., Norris, R. D., Swift, S. A. and Sexton,
P. F.: Cenozoic North Atlantic deep circulation history recorded in contourite drifts, offshore
Newfoundland, Canada, Mar. Geol., 385, 185–203, https://doi.org/10.1016/j.margeo.2016.12.014, 2017.
Bozukov, V., Utescher, T., and Ivanov, D.: Late Eocene to early Miocene climate and
vegetation of Bulgaria, Rev. Palaeobot. Palynol., 153, 360–374,
https://doi.org/10.1016/j.revpalbo.2008.10.005, 2009.
Brassell, S. C.: Climatic influences on the Paleogene evolution of alkenones,
Paleoceanography, 29, 255–272, https://doi.org/10.1002/2013PA002576, 2014.
Brassell, S. C., Eglinton, G., Marlowe, I. T., Pflaumann, U., and Sarnthein, M.:
Molecular stratigraphy: a new tool for climatic assessment, Nature, 320, 129,
https://doi.org/10.1038/320129a0, 1986.
Breedlovestrout, R. L., Evraets, B. J., and Parrish, J. T.: New Paleogene paleoclimate
analysis of western Washington using physiognomic characteristics from fossil leaves,
Palaeogeogr. Palaeoclimatol. Palaeoecol., 392, 22–40, https://doi.org/10.1016/j.palaeo.2013.08.013, 2013.
Brinkhuis, H., Schouten, S., Collinson, M. E., Sluijs, A., Damsté, J. S. S.,
Dickens, G. R., Huber, M., Cronin, T. M., Onodera, J., Takahashi, K., Bujak, J. P., Stein, R., van
der Burgh, J., Eldrett, J. S., Harding, I. C., Lotter, A. F., Sangiorgi, F., Cittert, H. van K.,
de Leeuw, J. W., Matthiessen, J., Backman, J., Moran, K., and the Expedition 302 Scientists:
Episodic fresh surface waters in the Eocene Arctic Ocean, Nature, 441, 606–609,
https://doi.org/10.1038/nature04692, 2006.
Broecker, W. S. and Peng, T.-H.: Tracers in the sea, Eldigio Press, Columbia
University, Palisades, NY, 1982.
Cande, S. C. and Kent, D. V: Revised calibration of the geomagnetic polarity timescale
for the Late Cretaceous and Cenozoic, J. Geophys. Res.-Sol. Ea., 100, 6093–6095,
https://doi.org/10.1029/94JB03098, 1995.
Carter, A., Riley, T. R., Hillenbrand, C.-D., and Rittner, M.: Widespread Antarctic
glaciation during the Late Eocene, Earth Planet. Sci. Lett., 458, 49–57,
https://doi.org/10.1016/j.epsl.2016.10.045, 2017.
Chamberlain, C. P., Mix, H. T., Mulch, A., Hren, M. T., Kent-Corson, M. L., Davis,
S. J., Horton, T. W., and Graham, S. A.: The Cenozoic climatic and topographic evolution of the
western North American Cordillera, Am. J. Sci., 312, 213–262, https://doi.org/10.2475/02.2012.05, 2012.
Coccione, R.: The genera Hantkenina and Cribrohantkenina (foraminifera) in the
Massignano Section (Ancona, Italy), in: International Subcommission on Paleogeography and
Stratigraphy, Eocene/Oligocene Meeting, October 1987, Ancona, Italy, 81–96, 1988.
Collinson, M. E. and Hooker, J. J.: Paleogene vegetation of Eurasia: framework for
mammalian faunas, Deinsea, 10, 41–84, 2003.
Colwyn, D. A. and Hren, M. T.: An abrupt decrease in Southern Hemisphere terrestrial
temperature during the Eocene–Oligocene transition, Earth Planet. Sci. Lett., 512, 227–235,
https://doi.org/10.1016/j.epsl.2019.01.052, 2019.
Costa, E., Garcés, M., Sáez, A., Cabrera, L., and López-Blanco, M.: The age
of the “Grande Coupure” mammal turnover: New constraints from the Eocene–Oligocene record of
the Eastern Ebro Basin (NE Spain), Palaeogeogr. Palaeoclimatol. Palaeoecol., 301, 97–107,
https://doi.org/10.1016/j.palaeo.2011.01.005, 2011.
Cotton, L. J. and Pearson, P. N.: Extinction of larger benthic foraminifera at the
Eocene/Oligocene boundary, Palaeogeogr. Palaeoclimatol. Palaeoecol., 311, 281–296,
https://doi.org/10.1016/j.palaeo.2011.09.008, 2011.
Cotton, L. J., Pearson, P. N., and Renema, W.: Stable isotope stratigraphy and larger
benthic foraminiferal extinctions in the Melinau Limestone, Sarawak, J. Asian Earth Sci., 79,
65–71, https://doi.org/10.1016/j.jseaes.2013.09.025, 2014.
Coxall, H. K. and Pearson, P. N.: The Eocene-Oligocene transition, Deep Time
Perspect. Clim. Chang. Marrying Signal From Comput. Model. Biol. Proxies, The Micropalaeontological Society, Special Publications, The Geological Society, London, UK, 351–387, 2007.
Coxall, H. K. and Wilson, P. A.: Early Oligocene glaciation and productivity in the
eastern equatorial Pacific: Insights into global carbon cycling, Paleoceanography, 26, PA2221,
https://doi.org/10.1029/2010PA002021, 2011.
Coxall, H. K., Wilson, P. A., Palike, H., Lear, C. H., and Backman, J.: Rapid stepwise
onset of Antarctic glaciation and deeper calcite compensation in the Pacific Ocean, Nature, 433,
53–57, https://doi.org/10.1038/nature03135, 2005.
Coxall, H. K., Huck, C. E., Huber, M., Lear, C. H., Legarda-Lisarri, A., O'Regan, M.,
Sliwinska, K. K., van de Flierdt, T., de Boer, A. M., Zachos, J. C., and Backman, J.: Export of
nutrient rich Northern Component Water preceded early Oligocene Antarctic glaciation,
Nat. Geosci., 11, 190–196, https://doi.org/10.1038/s41561-018-0069-9, 2018.
Cramer, B. S., Toggweiler, J. R., Wright, J. D., Katz, M. E., and Miller, K. G.: Ocean
overturning since the Late Cretaceous: Inferences from a new benthic foraminiferal isotope
compilation, Paleoceanography, 24, PA4216, https://doi.org/10.1029/2008PA001683, 2009.
Cramwinckel, M. J., Huber, M., Kocken, I. J., Agnini, C., Bijl, P. K., Bohaty, S. M.,
Frieling, J., Goldner, A., Hilgen, F. J., Kip, E. L., Peterse, F., van der Ploeg, R., Röhl,
U., Schouten, S., and Sluijs, A.: Synchronous tropical and polar temperature evolution in the
Eocene, Nature, 559, 382–386, https://doi.org/10.1038/s41586-018-0272-2, 2018.
Cristini, L., Grosfeld, K., Butzin, M., and Lohmann, G.: Influence of the opening of
the Drake Passage on the Cenozoic Antarctic Ice Sheet: A modeling approach,
Palaeogeogr. Palaeoclimatol. Palaeoecol., 339–341, 66–73, https://doi.org/10.1016/j.palaeo.2012.04.023,
2012.
Crosby, A. G., McKenzie, D., and Sclater, J. G.: The relationship between depth, age
and gravity in the oceans, Geophys. J. Int., 166, 553–573,
https://doi.org/10.1111/j.1365-246X.2006.03015.x, 2006.
Cyr, A. J., Currie, B. S., and Rowley, D. B.: Geochemical Evaluation of Fenghuoshan
Group Lacustrine Carbonates, North-Central Tibet: Implications for the Paleoaltimetry of the
Eocene Tibetan Plateau, J. Geol., 113, 517–533, https://doi.org/10.1086/431907, 2005.
Dalziel, I. W. D., Lawver, L. A., Pearce, J. A., Barker, P. F., Hastie, A. R., Barfod,
D. N., Schenke, H.-W., and Davis, M. B.: A potential barrier to deep Antarctic circumpolar flow
until the late Miocene?, Geology, 41, 947–950, https://doi.org/10.1130/G34352.1, 2013.
Darby, D. A.: Ephemeral formation of perennial sea ice in the Arctic Ocean during the
middle Eocene, Nat. Geosci., 7, 210, https://doi.org/10.1038/ngeo2068, 2014.
DeConto, R. M. and Pollard, D.: Rapid Cenozoic glaciation of Antarctica induced by
declining atmospheric CO2, Nature, 421, 245–249, https://doi.org/10.1038/nature01290, 2003.
DeConto, R. M., Pollard, D., Wilson, P. A., Palike, H., Lear, C. H., and Pagani, M.:
Thresholds for Cenozoic bipolar glaciation, Nature, 455, 652–656, https://doi.org/10.1038/nature07337,
2008.
De Schepper, S., Gibbard, P. L., Salzmann, U., and Ehlers, J.: A global synthesis of
the marine and terrestrial evidence for glaciation during the Pliocene Epoch, Earth-Science Rev.,
135, 83–102, https://doi.org/10.1016/j.earscirev.2014.04.003, 2014.
Dingle, R. V, Marenssi, S. A., and Lavelle, M.: High latitude Eocene climate
deterioration: evidence from the northern Antarctic Peninsula, J. South Am. Earth Sci., 11,
571–579, https://doi.org/10.1016/S0895-9811(98)00035-2, 1998.
Diester-Haass, L. and Zahn, R.: Eocene-Oligocene transition in the Southern Ocean: History of water mass circulation and biological productivity,
Geology, 24, 163–166, https://doi.org/10.1130/0091-7613(1996)024<0163:EOTITS>2.3.CO;2, 1996.
Doria, G., Royer, D. L., Wolfe, A. P., Fox, A., Westgate, J. A., and Beerling, D. J.:
Declining atmospheric CO2 during the late Middle Eocene climate transition, Am. J. Sci., 311,
63–75, https://doi.org/10.2475/01.2011.03, 2011.
Dunkley Jones, T., Bown, P. R., Pearson, P. N., Wade, B. S., Coxall, H. K. and Lear,
C. H.: Major shifts in calcareous phytoplankton assemblages through the Eocene-Oligocene
transition of Tanzania and their implications for low-latitude primary production,
Paleoceanography, 23, PA4204,
https://doi.org/10.1029/2008PA001640, 2008.
Dupont-Nivet, G., Krijgsman, W., Langereis, C. G., Abels, H. A., Dai, S., and Fang, X.:
Tibetan plateau aridification linked to global cooling at the Eocene–Oligocene transition,
Nature, 445, 635, https://doi.org/10.1038/nature05516, 2007.
Dupont-Nivet, G., Hoorn, C., and Konert, M.: Tibetan uplift prior to the
Eocene-Oligocene climate transition: Evidence from pollen analysis of the Xining Basin, Geology,
36, 987–990, https://doi.org/10.1130/G25063A.1, 2008.
Eagles, G., Livermore, R. A., Fairhead, J. D., and Morris, P.: Tectonic evolution of
the west Scotia Sea, J. Geophys. Res.-Sol. Ea., 110, B02401, https://doi.org/10.1029/2004JB003154, 2005.
Ehlers, J. and Gibbard, P. L.: The extent and chronology of Cenozoic Global Glaciation,
Quat. Int., 164–165, 6–20, https://doi.org/10.1016/j.quaint.2006.10.008, 2007.
Ehrmann, W. U. and Mackensen, A.: Sedimentological evidence for the formation of an
East Antarctic ice sheet in Eocene/Oligocene time, Palaeogeogr. Palaeoclimatol. Palaeoecol., 93,
85–112, https://doi.org/10.1016/0031-0182(92)90185-8, 1992.
Elderfield, H., Ferretti, P., Greaves, M., Crowhurst, S., McCave, I. N., Hodell, D.,
and Piotrowski, A. M.: Evolution of Ocean Temperature and Ice Volume Through the Mid-Pleistocene
Climate Transition, Science, 337, 704–709, https://doi.org/10.1126/science.1221294, 2012.
Eldrett, J. S., Harding, I. C., Wilson, P. A., Butler, E., and Roberts, A. P.:
Continental ice in Greenland during the Eocene and Oligocene, Nature, 446, 176,
https://doi.org/10.1038/nature05591, 2007.
Eldrett, J. S., Greenwood, D. R., Harding, I. C., and Huber, M.: Increased seasonality
through the Eocene to Oligocene transition in northern high latitudes, Nature, 459, 969–973,
https://doi.org/10.1038/nature08069, 2009.
Elsworth, G., Galbraith, E., Halverson, G., and Yang, S.: Enhanced weathering and CO2
drawdown caused by latest Eocene strengthening of the Atlantic meridional overturning circulation,
Nat. Geosci., 10, 213–216, https://doi.org/10.1038/ngeo2888, 2017.
England, M. H., Hutchinson, D. K., Santoso, A., and Sijp, W. P.: Ice–Atmosphere
Feedbacks Dominate the Response of the Climate System to Drake Passage Closure, J. Clim., 30,
5775–5790, https://doi.org/10.1175/JCLI-D-15-0554.1, 2017.
Erdei, B., Utescher, T., Hably, L., Tamas, J., Roth-Nebelsick, A., and Grein, M.: Early
Oligocene continental climate of the Palaeogene Basin (Hungary and Slovenia) and the surrounding
area, Turk. J. Earth Sci., 21, 153–186, https://doi.org/10.3906/yer-1005-29, 2012.
Eronen, J. T., Janis, C. M., Chamberlain, C. P., and Mulch, A.: Mountain uplift
explains differences in Palaeogene patterns of mammalian evolution and extinction between North
America and Europe, Proc. R. Soc. B-Biol. Sci., 282, 20150136, https://doi.org/10.1098/rspb.2015.0136,
2015.
Escutia, C., Brinkhuis, H., Klaus, A., and the IODP Expedition 318 Scientists: IODP
Expedition 318: From Greenhouse to Icehouse at the Wilkes Land Antarctic Margin, Sci. Drill., 12,
15–23, https://doi.org/10.2204/iodp.sd.12.02.2011, 2011.
Evans, D., Wade, B. S., Henehan, M., Erez, J., and Müller, W.: Revisiting carbonate chemistry controls on planktic foraminifera Mg / Ca: implications for sea surface temperature and hydrology shifts over the Paleocene–Eocene Thermal Maximum and Eocene–Oligocene transition, Clim. Past, 12, 819–835, https://doi.org/10.5194/cp-12-819-2016, 2016.
Evans, D., Sagoo, N., Renema, W., Cotton, L. J., Müller, W., Todd, J. A.,
Saraswati, P. K., Stassen, P., Ziegler, M., Pearson, P. N., Valdes, P. J., and Affek, H. P.:
Eocene greenhouse climate revealed by coupled clumped isotope-Mg ∕ Ca thermometry,
Proc. Natl. Acad. Sci. USA, 115, 1174–1179, https://doi.org/10.1073/pnas.1714744115, 2018.
Exon, N. F., Kennett, J. P., and Malone, M. J.: Leg 189 Synthesis: Cretaceous –
Holocene history of the Tasmanian gateway, in: Proceedings of the Ocean Drilling Program:
Scientific Results, 189, available at:
http://www-odp.tamu.edu/publications/189_SR/synth/synth.htm (last access: 10 April 2020), 2004.
Falkowski, P. G., Katz, M. E., Knoll, A. H., Quigg, A., Raven, J. A., Schofield, O.,
and Taylor, F. J. R.: The Evolution of Modern Eukaryotic Phytoplankton, Science, 305, 354–360,
https://doi.org/10.1126/science.1095964, 2004.
Fan, M., Ayyash, S. A., Tripati, A., Passey, B. H., and Griffith, E. M.: Terrestrial
cooling and changes in hydroclimate in the continental interior of the United States across the
Eocene-Oligocene boundary, GSA Bull., 130, 1073–1084, https://doi.org/10.1130/B31732.1, 2017.
Fan, M., Feng, R., Geissman, J. W., and Poulsen, C. J.: Late Paleogene emergence of a
North American loess plateau, Geology, 48, 273–277, https://doi.org/10.1130/G47102.1, 2020.
Farnsworth, A., Lunt, D. J., O'Brien, C., Foster, G. L., Inglis, G. N., Markwick, P.,
Pancost, R. D., and Robinson, S. A.: Climate sensitivity on geological timescales controlled by
non-linear feedbacks and ocean circulation, Geophys. Res. Lett., 46, 9880–9889, https://doi.org/10.1029/2019GL083574, 2019.
Ferreira, D., Cessi, P., Coxall, H. K., de Boer, A., Dijkstra, H. A., Drijfhout, S. S.,
Eldevik, T., Harnik, N., McManus, J. F., Marshall, D. P., Nilsson, J., Roquet, F., Schneider, T.,
and Wills, R. C.: Atlantic-Pacific Asymmetry in Deep Water Formation, Annu. Rev. Earth
Planet. Sci., 46, 327–352, https://doi.org/10.1146/annurev-earth-082517-010045, 2018.
Figueirido, B., Janis, C. M., Pérez-Claros, J. A., De Renzi, M., and Palmqvist, P.:
Cenozoic climate change influences mammalian evolutionary dynamics, P. Natl. Acad. Sci. USA, 109,
722–727, https://doi.org/10.1073/pnas.1110246108, 2012.
Foster, G. L. and Rae, J. W. B.: Reconstructing Ocean pH with Boron Isotopes in
Foraminifera, Annu. Rev. Earth Planet. Sci., 44, 207–237,
https://doi.org/10.1146/annurev-earth-060115-012226, 2016.
Foster, G. L., Lear, C. H., and Rae, J. W. B.: The evolution of pCO2, ice volume and
climate during the middle Miocene, Earth Planet. Sci. Lett., 341–344, 243–254,
https://doi.org/10.1016/j.epsl.2012.06.007, 2012.
Foster, G. L., Royer, D. L., and Lunt, D. J.: Future climate forcing potentially
without precedent in the last 420 million years, Nat. Commun., 8, 14845,
https://doi.org/10.1038/ncomms14845, 2017.
Francis, J. E., Marenssi, S., Levy, R., Hambrey, M., Thorn, V. C., Mohr, B., Brinkhuis,
H., Warnaar, J., Zachos, J., Bohaty, S., and DeConto, R.: From Greenhouse to Icehouse – The
Eocene/Oligocene in Antarctica, Chapter 8 in: Antarctic Climate Evolution, vol. 8, edited by:
Florindo, F., Siegert, M., Elsevier, Amsterdam, the Netherlands, 309–368,
2008.
Franks, P. J., Royer, D. L., Beerling, D. J., Van de Water, P. K., Cantrill, D. J.,
Barbour, M. M., and Berry, J. A.: New constraints on atmospheric CO2 concentration for the
Phanerozoic, Geophys. Res. Lett., 41, 4685–4694, https://doi.org/10.1002/2014GL060457, 2014.
Fyke, J. G., D'Orgeville, M., and Weaver, A. J.: Drake Passage and Central American
Seaway controls on the distribution of the oceanic carbon reservoir, Glob. Planet. Change, 128,
72–82, https://doi.org/10.1016/j.gloplacha.2015.02.011, 2015.
Galeotti, S., DeConto, R., Naish, T., Stocchi, P., Florindo, F., Pagani, M., Barrett,
P., Bohaty, S. M., Lanci, L., Pollard, D., Sandroni, S., Talarico, F. M., and Zachos, J. C.:
Antarctic Ice Sheet variability across the Eocene-Oligocene boundary climate transition, Science,
352, 76–80, https://doi.org/10.1126/science.aab0669, 2016.
Gallagher, S. J., Wade, B., Qianyu, L., Holdgate, G. R., Bown, P., Korasidis, V. A.,
Scher, H., Houben, A. J. P., McGowran, B., and Allan, T.: Eocene to Oligocene high paleolatitude
neritic record of Oi-1 glaciation in the Otway Basin southeast Australia, Glob. Planet. Change,
191, 103218, https://doi.org/10.1016/j.gloplacha.2020.103218, 2020.
Gallagher, T. M. and Sheldon, N. D.: A new paleothermometer for forest paleosols and
its implications for Cenozoic climate, Geology, 41, 647–650, https://doi.org/10.1130/G34074.1, 2013.
Gasson, E., Siddall, M., Lunt, D. J., Rackham, O. J. L., Lear, C. H., and Pollard, D.:
Exploring uncertainties in the relationship between temperature, ice volume, and sea level over
the past 50 million years, Rev. Geophys., 50, RG1005, https://doi.org/10.1029/2011RG000358, 2012.
Gasson, E., Lunt, D. J., DeConto, R., Goldner, A., Heinemann, M., Huber, M., LeGrande, A. N., Pollard, D., Sagoo, N., Siddall, M., Winguth, A., and Valdes, P. J.: Uncertainties in the modelled CO2 threshold for Antarctic glaciation, Clim. Past, 10, 451–466, https://doi.org/10.5194/cp-10-451-2014, 2014.
Ghosh, P., Adkins, J., Affek, H., Balta, B., Guo, W., Schauble, E. A., Schrag, D., and
Eiler, J. M.: 13C–18O bonds in carbonate minerals: A new kind of paleothermometer,
Geochim. Cosmochim. Acta, 70, 1439–1456, https://doi.org/10.1016/j.gca.2005.11.014, 2006.
Gion, A. M., Williams, S. E., and Müller, R. D.: A reconstruction of the Eurekan
Orogeny incorporating deformation constraints, Tectonics, 36, 304–320,
https://doi.org/10.1002/2015TC004094, 2017.
Goddéris, Y., Donnadieu, Y., Le Hir, G., Lefebvre, V., and Nardin, E.: The role of
palaeogeography in the Phanerozoic history of atmospheric CO2 and climate, Earth-Sci. Rev., 128,
122–138, https://doi.org/10.1016/j.earscirev.2013.11.004, 2014.
Goldner, A., Herold, N., and Huber, M.: Antarctic glaciation caused ocean circulation
changes at the Eocene-Oligocene transition, Nature, 511, 574–577, https://doi.org/10.1038/nature13597,
2014.
Gradstein, F. M., Ogg, J. G., Schmitz, M., and Ogg, G.: The geologic time scale 2012,
Elsevier, Amsterdam, the Netherlands, 2012.
Greenop, R., Hain, M. P., Sosdian, S. M., Oliver, K. I. C., Goodwin, P., Chalk, T. B., Lear, C. H., Wilson, P. A., and Foster, G. L.: A record of Neogene seawater δ11B reconstructed from paired δ11B analyses on benthic and planktic foraminifera, Clim. Past, 13, 149–170, https://doi.org/10.5194/cp-13-149-2017, 2017.
Greenwood, D. R. and Wing, S. L.: Eocene continental climates and latitudinal
temperature gradients, Geology, 23, 1044–1048,
https://doi.org/10.1130/0091-7613(1995)023<1044:ECCALT>2.3.CO;2, 1995.
Grein, M., Oehm, C., Konrad, W., Utescher, T., Kunzmann, L., and Roth-Nebelsick, A.:
Atmospheric CO2 from the late Oligocene to early Miocene based on photosynthesis data and
fossil leaf characteristics, Palaeogeogr. Palaeoclimatol. Palaeoecol., 374, 41–51,
https://doi.org/10.1016/j.palaeo.2012.12.025, 2013.
Griener, K. W., Nelson, D. M., and Warny, S.: Declining moisture availability on the
Antarctic Peninsula during the Late Eocene, Palaeogeogr. Palaeoclimatol. Palaeoecol., 383–384,
72–78, https://doi.org/10.1016/j.palaeo.2013.05.004, 2013.
Grimes, S. T., Hooker, J. J., Collinson, M. E., and Mattey, D. P.: Summer temperatures
of late Eocene to early Oligocene freshwaters, Geology, 33, 189–192, https://doi.org/10.1130/G21019.1,
2005.
Gurnis, M., Yang, T., Cannon, J., Turner, M., Williams, S., Flament, N., and
Müller, R. D.: Global tectonic reconstructions with continuously deforming and evolving rigid
plates, Comput. Geosci., 116, 32–41, https://doi.org/10.1016/j.cageo.2018.04.007, 2018.
Haiblen, A. M., Opdyke, B. N., Roberts, A. P., Heslop, D., and Wilson, P. A.:
Midlatitude Southern Hemisphere Temperature Change at the End of the Eocene Greenhouse Shortly
Before Dawn of the Oligocene Icehouse, Paleoceanogr. Paleoclimatol., 34, 1995–2004,
https://doi.org/10.1029/2019PA003679, 2019.
Hegewald, A. and Jokat, W.: Relative sea level variations in the Chukchi region –
Arctic Ocean – since the late Eocene, Geophys. Res. Lett., 40, 803–807, https://doi.org/10.1002/grl.50182,
2013.
Helland, P. E. and Holmes, M. A.: Surface textural analysis of quartz sand grains from
ODP Site 918 off the southeast coast of Greenland suggests glaciation of southern Greenland at 11
Ma, Palaeogeogr. Palaeoclimatol. Palaeoecol., 135, 109–121, https://doi.org/10.1016/S0031-0182(97)00025-4,
1997.
Héran, M., Lécuyer, C., and Legendre, S.: Cenozoic long-term terrestrial
climatic evolution in Germany tracked by δ18O of rodent tooth phosphate,
Palaeogeogr. Palaeoclimatol. Palaeoecol., 285, 331–342, https://doi.org/10.1016/j.palaeo.2009.11.030, 2010.
Herman, A. B., Spicer, R. A., Aleksandrova, G. N., Yang, J., Kodrul, T. M., Maslova,
N. P., Spicer, T. E. V, Chen, G., and Jin, J.-H.: Eocene–early Oligocene climate and vegetation
change in southern China: Evidence from the Maoming Basin,
Palaeogeogr. Palaeoclimatol. Palaeoecol., 479, 126–137, https://doi.org/10.1016/j.palaeo.2017.04.023, 2017.
Herold, N., Buzan, J., Seton, M., Goldner, A., Green, J. A. M., Müller, R. D., Markwick, P., and Huber, M.: A suite of early Eocene (∼ 55 Ma) climate model boundary conditions, Geosci. Model Dev., 7, 2077–2090, https://doi.org/10.5194/gmd-7-2077-2014, 2014.
Heureux, A. M. C. and Rickaby, R. E. M.: Refining our estimate of atmospheric CO2
across the Eocene–Oligocene climatic transition, Earth Planet. Sci. Lett., 409, 329–338,
https://doi.org/10.1016/j.epsl.2014.10.036, 2015.
Hill, D. J., Haywood, A. M., Valdes, P. J., Francis, J. E., Lunt, D. J., Wade, B. S.,
and Bowman, V. C.: Paleogeographic controls on the onset of the Antarctic circumpolar current,
Geophys. Res. Lett., 40, 5199–5204, https://doi.org/10.1002/grl.50941, 2013.
Hincke, A. J. C., Broere, T., Kürschner, W. M., Donders, T. H., and Wagner-Cremer,
F.: Multi-year leaf-level response to sub-ambient and elevated experimental CO2 in Betula
nana, PLoS One, 11, e0157400, https://doi.org/10.1371/journal.pone.0157400, 2016.
Hinojosa, L. F. and Villagrán, C.: Did South American Mixed Paleofloras evolve
under thermal equability or in the absence of an effective Andean barrier during the Cenozoic?,
Palaeogeogr. Palaeoclimatol. Palaeoecol., 217, 1–23, https://doi.org/10.1016/j.palaeo.2004.11.013, 2005.
Hohbein, M. W., Sexton, P. F., and Cartwright, J. A.: Onset of North Atlantic Deep
Water production coincident with inception of the Cenozoic global cooling trend, Geology, 40,
255–258, https://doi.org/10.1130/G32461.1, 2012.
Hollis, C. J., Handley, L., Crouch, E. M., Morgans, H. E. G., Baker, J. A., Creech,
J., Collins, K. S., Gibbs, S. J., Huber, M., Schouten, S., Zachos, J. C., and Pancost, R. D.:
Tropical sea temperatures in the high-latitude South Pacific during the Eocene, Geology, 37,
99–102, https://doi.org/10.1130/G25200A.1, 2009.
Hollis, C. J., Taylor, K. W. R., Handley, L., Pancost, R. D., Huber, M., Creech,
J. B., Hines, B. R., Crouch, E. M., Morgans, H. E. G., Crampton, J. S., Gibbs, S., Pearson,
P. N., and Zachos, J. C.: Early Paleogene temperature history of the Southwest Pacific Ocean:
Reconciling proxies and models, Earth Planet. Sci. Lett., 349–350, 53–66,
https://doi.org/10.1016/j.epsl.2012.06.024, 2012.
Hollis, C. J., Dunkley Jones, T., Anagnostou, E., Bijl, P. K., Cramwinckel, M. J., Cui, Y., Dickens, G. R., Edgar, K. M., Eley, Y., Evans, D., Foster, G. L., Frieling, J., Inglis, G. N., Kennedy, E. M., Kozdon, R., Lauretano, V., Lear, C. H., Littler, K., Lourens, L., Meckler, A. N., Naafs, B. D. A., Pälike, H., Pancost, R. D., Pearson, P. N., Röhl, U., Royer, D. L., Salzmann, U., Schubert, B. A., Seebeck, H., Sluijs, A., Speijer, R. P., Stassen, P., Tierney, J., Tripati, A., Wade, B., Westerhold, T., Witkowski, C., Zachos, J. C., Zhang, Y. G., Huber, M., and Lunt, D. J.: The DeepMIP contribution to PMIP4: methodologies for selection, compilation and analysis of latest Paleocene and early Eocene climate proxy data, incorporating version 0.1 of the DeepMIP database, Geosci. Model Dev., 12, 3149–3206, https://doi.org/10.5194/gmd-12-3149-2019, 2019.
Homes, A. M., Cieraad, E., Lee, D. E., Lindqvist, J. K., Raine, J. I., Kennedy, E. M.,
and Conran, J. G.: A diverse fern flora including macrofossils with in situ spores from the late
Eocene of southern New Zealand, Rev. Palaeobot. Palynol., 220, 16–28,
https://doi.org/10.1016/j.revpalbo.2015.04.007, 2015.
Hooker, J. J., Collinson, M. E., and Sille, N. P.: Eocene–Oligocene mammalian faunal
turnover in the Hampshire Basin, UK: calibration to the global time scale and the major cooling
event, J. Geol. Soc. London., 161, 161–172, https://doi.org/10.1144/0016-764903-091, 2004.
Hoorn, C., Straathof, J., Abels, H. A., Xu, Y., Utescher, T., and Dupont-Nivet, G.: A
late Eocene palynological record of climate change and Tibetan Plateau uplift (Xining Basin,
China), Palaeogeogr. Palaeoclimatol. Palaeoecol., 344–345, 16–38,
https://doi.org/10.1016/j.palaeo.2012.05.011, 2012.
Houben, A. J. P., van Mourik, C. A., Montanari, A., Coccioni, R., and Brinkhuis, H.:
The Eocene–Oligocene transition: Changes in sea level, temperature or both?,
Palaeogeogr. Palaeoclimatol. Palaeoecol., 335–336, 75–83, https://doi.org/10.1016/j.palaeo.2011.04.008,
2012.
Hren, M. T., Sheldon, N. D., Grimes, S. T., Collinson, M. E., Hooker, J. J., Bugler,
M., and Lohmann, K. C.: Terrestrial cooling in Northern Europe during the Eocene–Oligocene
transition, P. Natl. Acad. Sci. USA, 110, 7562–7567, https://doi.org/10.1073/pnas.1210930110, 2013.
Huang, X., Gohl, K., and Jokat, W.: Variability in Cenozoic sedimentation and
paleo-water depths of the Weddell Sea basin related to pre-glacial and glacial conditions of
Antarctica, Glob. Planet. Change, 118, 25–41, https://doi.org/10.1016/j.gloplacha.2014.03.010, 2014.
Huber, M.: A Hotter Greenhouse?, Science, 321, 353–354,
https://doi.org/10.1126/science.1161170, 2008.
Huber, M. and Caballero, R.: The early Eocene equable climate problem revisited, Clim. Past, 7, 603–633, https://doi.org/10.5194/cp-7-603-2011, 2011.
Huber, M. and Nof, D.: The ocean circulation in the southern hemisphere and its
climatic impacts in the Eocene, Palaeogeogr. Palaeoclimatol. Palaeoecol., 231, 9–28,
https://doi.org/10.1016/j.palaeo.2005.07.037, 2006.
Huber, M. and Sloan, L. C.: Climatic responses to tropical sea surface temperature
changes on a “greenhouse” Earth, Paleoceanography, 15, 443–450, https://doi.org/10.1029/1999PA000455,
2000.
Huber, M. and Sloan, L. C.: Heat transport, deep waters, and thermal gradients:
Coupled simulation of an Eocene greenhouse climate, Geophys. Res. Lett., 28, 3481–3484,
https://doi.org/10.1029/2001GL012943, 2001.
Huber, M., Sloan, L., and Shellito, C.: Early Paleogene oceans and climate: A fully
coupled modeling approach using the NCAR CCSM, in: Causes and consequences of globally warm
climates in the Early Paleogene, Geol. Soc. Am. Spec. Pap., 369, 25–47, 2003.
Huber, M., Brinkhuis, H., Stickley, C. E., Döös, K., Sluijs, A., Warnaar, J.,
Schellenberg, S. A., and Williams, G. L.: Eocene circulation of the Southern Ocean: Was Antarctica
kept warm by subtropical waters?, Paleoceanography, 19, PA4026, https://doi.org/10.1029/2004PA001014, 2004.
Hurley, S. J., Elling, F. J., Könneke, M., Buchwald, C., Wankel, S. D., Santoro,
A. E., Lipp, J. S., Hinrichs, K.-U., and Pearson, A.: Influence of ammonia oxidation rate on
thaumarchaeal lipid composition and the TEX86 temperature proxy, P. Natl. Acad. Sci. USA,
113, 7762–7767, https://doi.org/10.1073/pnas.1518534113, 2016.
Hutchinson, D. K., de Boer, A. M., Coxall, H. K., Caballero, R., Nilsson, J., and Baatsen, M.: Climate sensitivity and meridional overturning circulation in the late Eocene using GFDL CM2.1, Clim. Past, 14, 789–810, https://doi.org/10.5194/cp-14-789-2018, 2018.
Hutchinson, D. K., Coxall, H. K., O'Regan, M., Nilsson, J., Caballero, R. and de
Boer, A. M.: Arctic closure as a trigger for Atlantic overturning at the Eocene-Oligocene
Transition, Nat. Commun., 10, 3797, https://doi.org/10.1038/s41467-019-11828-z, 2019.
Hyeong, K., Kuroda, J., Seo, I., and Wilson, P. A.: Response of the Pacific
inter-tropical convergence zone to global cooling and initiation of Antarctic glaciation across
the Eocene Oligocene Transition, Sci. Rep., 6, 30647, https://doi.org/10.1038/srep30647, 2016.
Inglis, G. N., Farnsworth, A., Lunt, D., Foster, G. L., Hollis, C. J., Pagani, M.,
Jardine, P. E., Pearson, P. N., Markwick, P., Galsworthy, A. M. J., Raynham, L., Taylor,
K. W. R., and Pancost, R. D.: Descent toward the Icehouse: Eocene sea surface cooling inferred
from GDGT distributions, Paleoceanography, 30, 1000–1020, https://doi.org/10.1002/2014PA002723, 2015.
Inglis, G. N., Bragg, F., Burls, N. J., Cramwinckel, M. J., Evans, D., Foster, G. L., Huber, M., Lunt, D. J., Siler, N., Steinig, S., Tierney, J. E., Wilkinson, R., Anagnostou, E., de Boer, A. M., Dunkley Jones, T., Edgar, K. M., Hollis, C. J., Hutchinson, D. K., and Pancost, R. D.: Global mean surface temperature and climate sensitivity of the early Eocene Climatic Optimum (EECO), Paleocene–Eocene Thermal Maximum (PETM), and latest Paleocene, Clim. Past, 16, 1953–1968, https://doi.org/10.5194/cp-16-1953-2020, 2020.
IPCC: Climate Change 2013: The Physical Science Basis. Contribution of Working Group I
to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, edited by:
Stocker, T. F., Qin, D., Plattner, G.-K., Tignor, M., Allen, S. K., Boschung, J., Nauels, A., Xia,
Y., Bex, V., Midgley, P. M., Cambridge University Press, Cambridge, United Kingdom and New York,
NY, USA, 2013.
Jacobs, B. F., Pan, A. D., and Scotese, C. R.: A review of the Cenozoic vegetation
history of Africa, in: Cenozoic mammals of Africa, edited by: Werdelin, W. J., Sanders, L.,
University of California Press, Berkeley, CA, 57–72, 2010.
Jakobsson, M., Backman, J., Rudels, B., Nycander, J., Frank, M., Mayer, L., Jokat, W.,
Sangiorgi, F., O/'Regan, M., Brinkhuis, H., King, J., and Moran, K.: The early Miocene onset of a
ventilated circulation regime in the Arctic Ocean, Nature, 447, 986–990,
https://doi.org/10.1038/nature05924, 2007.
Japsen, P., Bonow, J. M., Green, P. F., Chalmers, J. A., and Lidmar-Bergström, K.:
Elevated, passive continental margins: Long-term highs or Neogene uplifts? New evidence from West
Greenland, Earth Planet. Sci. Lett., 248, 330–339, https://doi.org/10.1016/j.epsl.2006.05.036, 2006.
Japsen, P., Green, P. F., and Bonow, J. M.: Investigation of the Burial and Exhumation History of East Greenland Based On Apatite-fission Track Analysis, Stratigraphic Landform Analysis and the Geological Record, OTC Arct. Technol. Conf., 23–25 March 2015, Copenhagen, Denmark, 8, https://doi.org/10.4043/25562-MS, 2015.
Jin, J.-H., Herman, A. B., Spicer, R. A., and Kodrul, T. M.: Palaeoclimate background
of the diverse Eocene floras of South China, Sci. Bull., 62, 1501–1503,
https://doi.org/10.1016/j.scib.2017.11.002, 2017.
John, E. H., Pearson, P. N., Coxall, H. K., Birch, H., Wade, B. S., and Foster, G. L.:
Warm ocean processes and carbon cycling in the Eocene, Philos. Trans. R. Soc. A-Math. Phys., 371, 20130099, https://doi.org/10.1098/rsta.2013.0099, 2013.
John, E. H., Wilson, J. D., Pearson, P. N., and Ridgwell, A.: Temperature-dependent
remineralization and carbon cycling in the warm Eocene oceans,
Palaeogeogr. Palaeoclimatol. Palaeoecol., 413, 158–166, https://doi.org/10.1016/j.palaeo.2014.05.019, 2014.
Jones, A. P., Dunkley Jones, T., Coxall, H., Pearson, P. N., Nala, D., and Hoggett,
M.: Low-Latitude Calcareous Nannofossil Response in the Indo-Pacific Warm Pool Across the
Eocene-Oligocene Transition of Java, Indonesia, Paleoceanogr. Paleoclimatol., 34, 1833–1847,
https://doi.org/10.1029/2019PA003597, 2019.
Katz, M. E., Miller, K. G., Wright, J. D., Wade, B. S., Browning, J. V, Cramer, B. S.,
and Rosenthal, Y.: Stepwise transition from the Eocene greenhouse to the Oligocene icehouse,
Nat. Geosci., 1, 329, https://doi.org/10.1038/ngeo179, 2008.
Katz, M. E., Cramer, B. S., Toggweiler, J. R., Esmay, G., Liu, C., Miller, K. G.,
Rosenthal, Y., Wade, B. S., and Wright, J. D.: Impact of Antarctic Circumpolar Current development
on late Paleogene ocean structure, Science, 332, 1076–1079, https://doi.org/10.1126/science.1202122, 2011.
Kennedy-Asser, A. T., Lunt, D. J., Farnsworth, A., and Valdes, P. J.: Assessing
Mechanisms and Uncertainty in Modeled Climatic Change at the Eocene-Oligocene Transition,
Paleoceanogr. Paleoclimatol., 34, 16–34, https://doi.org/10.1029/2018PA003380, 2019.
Kennedy-Asser, A. T., Lunt, D. J., Valdes, P. J., Ladant, J.-B., Frieling, J., and Lauretano, V.: Changes in the high-latitude Southern Hemisphere through the Eocene–Oligocene transition: a model–data comparison, Clim. Past, 16, 555–573, https://doi.org/10.5194/cp-16-555-2020, 2020.
Kennedy, A. T., Farnsworth, A., Lunt, D. J., Lear, C. H., and Markwick, P. J.:
Atmospheric and oceanic impacts of Antarctic glaciation across the Eocene–Oligocene transition,
Philos. Trans. R. Soc. A, 373, 20140419, https://doi.org/10.1098/rsta.2014.0419, 2015.
Kennett, J. P.: Cenozoic Evolution of Antarctic Glaciation, the Circum-Antarctic
Ocean, and Their Impact on Global Paleoceanography, J. Geophys. Res., 82, 3843–3860,
https://doi.org/10.1029/JC082i027p03843, 1977.
Kennett, J. P. and Shackleton, N. J.: Oxygen isotopic evidence for the development of
the psychrosphere 38 Myr ago, Nature, 260, 513, https://doi.org/10.1038/260513a0, 1976.
Kennett, J. P., Houtz, R. E., Andrews, P. B., Edwards, A. R., Gostin, V. A., Hajos,
M., Hampton, M., Jenkins, D. G., Margolis, S. V, Ovenshine, A. T., and Perch-Nielsen, K.: Cenozoic
paleoceanography in the Southwest Pacific Ocean, Antarctic glaciation, and the development of the
Circum-Antarctic Current, Initial Rep. Deep Sea Drill. Proj., 29, 1155, https://doi.org/10.2973/dsdp.proc.29.144.1975, 1975.
Kiehl, J. T. and Shields, C. A.: Sensitivity of the Palaeocene–Eocene Thermal Maximum
climate to cloud properties, Philos. Trans. R. Soc. A-Math. Phys., 371, 20130093,
https://doi.org/10.1098/rsta.2013.0093, 2013.
Kim, J.-H., van der Meer, J., Schouten, S., Helmke, P., Willmott, V., Sangiorgi, F.,
Koç, N., Hopmans, E. C., and Damsté, J. S. S.: New indices and calibrations derived from
the distribution of crenarchaeal isoprenoid tetraether lipids: Implications for past sea surface
temperature reconstructions, Geochim. Cosmochim. Acta, 74, 4639–4654,
https://doi.org/10.1016/j.gca.2010.05.027, 2010.
Kim, S. L., Eberle, J. J., Bell, D. M., Fox, D. A., and Padilla, A.: Evidence from
shark teeth for a brackish Arctic Ocean in the Eocene greenhouse, Geology, 42, 695–698,
https://doi.org/10.1130/G35675.1, 2014.
Kobashi, T., Grossman, E. L., Dockery, D. T., and Ivany, L. C.: Water mass stability
reconstructions from greenhouse (Eocene) to icehouse (Oligocene) for the northern Gulf Coast
continental shelf (USA), Paleoceanography, 19, PA1022, https://doi.org/10.1029/2003PA000934, 2004.
Kocsis, L., Ozsvárt, P., Becker, D., Ziegler, R., Scherler, L., and Codrea, V.:
Orogeny forced terrestrial climate variation during the late Eocene–early Oligocene in Europe,
Geology, 42, 727–730, https://doi.org/10.1130/G35673.1, 2014.
Kohn, M. J., Josef, J. A., Madden, R., Kay, R., Vucetich, G., and Carlini, A. A.:
Climate stability across the Eocene-Oligocene transition, southern Argentina, Geology, 32,
621–624, https://doi.org/10.1130/G20442.1, 2004.
Kohn, M. J., Strömberg, C. A. E., Madden, R. H., Dunn, R. E., Evans, S., Palacios,
A., and Carlini, A. A.: Quasi-static Eocene–Oligocene climate in Patagonia promotes slow faunal
evolution and mid-Cenozoic global cooling, Palaeogeogr. Palaeoclimatol. Palaeoecol., 435, 24–37,
https://doi.org/10.1016/j.palaeo.2015.05.028, 2015.
Konrad, W., Roth-Nebelsick, A., and Grein, M.: Modelling of stomatal density response
to atmospheric CO2, J. Theor. Biol., 253, 638–658, https://doi.org/10.1016/j.jtbi.2008.03.032,
2008.
Korasidis, V. A., Wallace, M. W., Wagstaff, B. E., and Hill, R. S.: Terrestrial
cooling record through the Eocene-Oligocene transition of Australia, Glob. Planet. Change, 173,
61–72, https://doi.org/10.1016/j.gloplacha.2018.12.007, 2019.
Kovar-Eder, J.: Early Oligocene plant diversity along the Upper Rhine Graben: The
fossil flora of Rauenberg, Germany, Acta Palaeobot., 56, 329, https://doi.org/10.1515/acpa-2016-0011, 2016.
Kraatz, B. P. and Geisler, J. H.: Eocene–Oligocene transition in Central Asia and its
effects on mammalian evolution, Geology, 38, 111–114, https://doi.org/10.1130/G30619.1, 2010.
Krylov, A. A., Andreeva, I. A., Vogt, C., Backman, J., Krupskaya, V. V, Grikurov,
G. E., Moran, K., and Shoji, H.: A shift in heavy and clay mineral provenance indicates a middle
Miocene onset of a perennial sea ice cover in the Arctic Ocean, Paleoceanography, 23, PA1S06, https://doi.org/10.1029/2007PA001497, 2008.
Kunzmann, L., Kvaček, Z., Teodoridis, V., Müller, C., and Moraweck, K.:
Vegetation dynamics of riparian forest in central Europe during the late Eocene, Palaeontogr. Abteilung B, 295, 69–89,
https://doi.org/10.1127/palb/295/2016/69, 2016.
Kürschner, W. M., Kvaček, Z., and Dilcher, D. L.: The impact of Miocene
atmospheric carbon dioxide fluctuations on climate and the evolution of terrestrial ecosystems,
P. Natl. Acad. Sci. USA, 105, 449–453, https://doi.org/10.1073/pnas.0708588105, 2008.
Kvaček, Z., Teodoridis, V., Mach, K., Přikryl, T., and Dvořák, Z.:
Tracing the Eocene-Oligocene transition: a case study from North Bohemia, Bull. Geosci., 89,
21–66, https://doi.org/10.3140/bull.geosci.1411, 2014.
Ladant, J.-B., Donnadieu, Y., and Dumas, C.: Links between CO2, glaciation and water flow: reconciling the Cenozoic history of the Antarctic Circumpolar Current, Clim. Past, 10, 1957–1966, https://doi.org/10.5194/cp-10-1957-2014, 2014a.
Ladant, J.-B., Donnadieu, Y., Lefebvre, V., and Dumas, C.: The respective role of
atmospheric carbon dioxide and orbital parameters on ice sheet evolution at the Eocene-Oligocene
transition, Paleoceanography, 29, 810–823, https://doi.org/10.1002/2013PA002593, 2014b.
Langton, S. J., Rabideaux, N. M., Borrelli, C., and Katz, M. E.: Southeastern Atlantic
deep-water evolution during the late-middle Eocene to earliest Oligocene (Ocean Drilling Program
Site 1263 and Deep Sea Drilling Project Site 366), Geosphere, 12, 1032–1047,
https://doi.org/10.1130/GES01268.1, 2016.
Larsen, H. C., Saunders, A. D., Clift, P. D., Beget, J., Wei, W., and Spezzaferri, S.:
Seven Million Years of Glaciation in Greenland, Science, 264, 952–955,
https://doi.org/10.1126/science.264.5161.952, 1994.
Lasabuda, A., Laberg, J. S., Knutsen, S.-M., and Høgseth, G.: Early to middle
Cenozoic paleoenvironment and erosion estimates of the southwestern Barents Sea: Insights from a
regional mass-balance approach, Mar. Pet. Geol.,
96, 501–521, https://doi.org/10.1016/j.marpetgeo.2018.05.039, 2018.
Lear, C. H., Elderfield, H., and Wilson, P. A.: Cenozoic Deep-Sea Temperatures and
Global Ice Volumes from Mg ∕ Ca in Benthic Foraminiferal Calcite, Science, 287, 269–272,
https://doi.org/10.1126/science.287.5451.269, 2000.
Lear, C. H., Rosenthal, Y., Coxall, H. K., and Wilson, P. A.: Late Eocene to early
Miocene ice sheet dynamics and the global carbon cycle, Paleoceanography, 19, PA4015, https://doi.org/10.1029/2004PA001039, 2004.
Lear, C. H., Bailey, T. R., Pearson, P. N., Coxall, H. K., and Rosenthal, Y.: Cooling
and ice growth across the Eocene-Oligocene transition, Geology, 36, 251, https://doi.org/10.1130/G24584A.1,
2008.
Lear, C. H., Mawbey, E. M., and Rosenthal, Y.: Cenozoic benthic foraminiferal Mg ∕ Ca
and Li ∕ Ca records: Toward unlocking temperatures and saturation states, Paleoceanography, 25, PA4215, https://doi.org/10.1029/2009PA001880, 2010.
Lear, C. H., Coxall, H. K., Foster, G. L., Lunt, D. J., Mawbey, E. M., Rosenthal, Y.,
Sosdian, S. M., Thomas, E., and Wilson, P. A.: Neogene ice volume and ocean temperatures: Insights
from infaunal foraminiferal Mg ∕ Ca paleothermometry, Paleoceanography, 30, 1437–1454,
https://doi.org/10.1002/2015PA002833, 2015.
Lefebvre, V., Donnadieu, Y., Sepulchre, P., Swingedouw, D., and Zhang, Z.-S.:
Deciphering the role of southern gateways and carbon dioxide on the onset of the Antarctic
Circumpolar Current, Paleoceanography, 27, PA4201, https://doi.org/10.1029/2012PA002345, 2012.
Lielke, K., Manchester, S., and Meyer, H.: Reconstructing the environment of the
northern Rocky Mountains during the Eocene/Oligocene transition: constraints from the palaeobotany
and geology of south-western Montana, USA, Acta Palaeobot., 52, 317–358, 2012.
Linnemann, U., Su, T., Kunzmann, L., Spicer, R. A., Ding, W.-N., Spicer, T. E. V,
Zieger, J., Hofmann, M., Moraweck, K., Gärtner, A., Gerdes, A., Marko, L., Zhang, S.-T., Li,
S.-F., Tang, H., Huang, J., Mulch, A., Mosbrugger, V., and Zhou, Z.-K.: New U-Pb dates show a
Paleogene origin for the modern Asian biodiversity hot spots, Geology, 46, 3–6,
https://doi.org/10.1130/G39693.1, 2017.
Liu, W., Xie, S.-P., Liu, Z., and Zhu, J.: Overlooked possibility of a collapsed
Atlantic Meridional Overturning Circulation in warming climate, Sci. Adv., 3, e1601666, https://doi.org/10.1126/sciadv.1601666, 2017.
Liu, X. Y., Gao, Q., Han, M., and Jin, J. H.: Estimates of late middle Eocene pCO2 based on stomatal density of modern and fossil Nageia leaves, Clim. Past, 12, 241–253, https://doi.org/10.5194/cp-12-241-2016, 2016.
Liu, Z., Tuo, S., Zhao, Q., Cheng, X., and Huang, W.: Deep-water Earliest Oligocene
Glacial Maximum (EOGM) in South Atlantic, Chinese Sci. Bull., 49, 2190–2197,
https://doi.org/10.1007/BF03185787, 2004.
Liu, Z., Pagani, M., Zinniker, D., DeConto, R., Huber, M., Brinkhuis, H., Shah, S. R.,
Leckie, R. M., and Pearson, A.: Global Cooling During the Eocene-Oligocene Climate Transition,
Science, 323, 1187–1190, https://doi.org/10.1126/science.1166368, 2009.
Liu, Z., He, Y., Jiang, Y., Wang, H., Liu, W., Bohaty, S. M., and Wilson, P. A.:
Transient temperature asymmetry between hemispheres in the Palaeogene Atlantic Ocean,
Nat. Geosci., 11, 656–660, https://doi.org/10.1038/s41561-018-0182-9, 2018.
Livermore, R., Hillenbrand, C.-D., Meredith, M., and Eagles, G.: Drake Passage and
Cenozoic climate: An open and shut case?, Geochem. Geophy. Geosy., 8, Q01005,
https://doi.org/10.1029/2005GC001224, 2007.
Lunt, D. J., Ridgwell, A., Valdes, P. J., and Seale, A.: “Sunshade World”: A fully
coupled GCM evaluation of the climatic impacts of geoengineering, Geophys. Res. Lett., 35, L12710, https://doi.org/10.1029/2008GL033674, 2008.
Lunt, D. J., Dunkley Jones, T., Heinemann, M., Huber, M., LeGrande, A., Winguth, A., Loptson, C., Marotzke, J., Roberts, C. D., Tindall, J., Valdes, P., and Winguth, C.: A model–data comparison for a multi-model ensemble of early Eocene atmosphere–ocean simulations: EoMIP, Clim. Past, 8, 1717–1736, https://doi.org/10.5194/cp-8-1717-2012, 2012.
Lunt, D. J., Farnsworth, A., Loptson, C., Foster, G. L., Markwick, P., O'Brien, C. L., Pancost, R. D., Robinson, S. A., and Wrobel, N.: Palaeogeographic controls on climate and proxy interpretation, Clim. Past, 12, 1181–1198, https://doi.org/10.5194/cp-12-1181-2016, 2016.
Lunt, D. J., Bragg, F., Chan, W.-L., Hutchinson, D. K., Ladant, J.-B., Morozova, P., Niezgodzki, I., Steinig, S., Zhang, Z., Zhu, J., Abe-Ouchi, A., Anagnostou, E., de Boer, A. M., Coxall, H. K., Donnadieu, Y., Foster, G., Inglis, G. N., Knorr, G., Langebroek, P. M., Lear, C. H., Lohmann, G., Poulsen, C. J., Sepulchre, P., Tierney, J. E., Valdes, P. J., Volodin, E. M., Dunkley Jones, T., Hollis, C. J., Huber, M., and Otto-Bliesner, B. L.: DeepMIP: model intercomparison of early Eocene climatic optimum (EECO) large-scale climate features and comparison with proxy data, Clim. Past, 17, 203–227, https://doi.org/10.5194/cp-17-203-2021, 2021.
Lyell, C. and Deshayes, G. P.: Principles of Geology: being an attempt to explain the
former changes of the Earth's surface, by reference to causes now in operation, John Murray,
London, 1830.
Macphail, M.: Australian palaeoclimates: Cretaceous to Tertiary a review of
palaeobotanical and related evidence to the year 2000, CRC LEME Open File Report 151, CRC LEME, Bentley, WA, Australia, 2007.
Maher, K. and Chamberlain, C. P.: Hydrologic Regulation of Chemical Weathering and the
Geologic Carbon Cycle, Science, 343, 1502–1504, https://doi.org/10.1126/science.1250770, 2014.
Mai, D. H.: Tertiäre Vegetationsgeschichte Europas, Feddes
Repert., 106, 331, https://doi.org/10.1002/fedr.19951060333,
1995.
Markwick, P. J.: The palaeogeographic and palaeoclimatic significance of climate
proxies for data-model comparisons, in: Deep-time perspectives on climate change: marrying the
signal from computer models and biological proxies, Micropalaeontol. Soc. Spec. Publ., London,
251–312, 2007.
Markwick, P. J.: Palaeogeography in exploration, Geol. Mag., 156, 366–407,
https://doi.org/10.1017/S0016756818000468, 2019.
Markwick, P. J. and Valdes, P. J.: Palaeo-digital elevation models for use as boundary
conditions in coupled ocean–atmosphere GCM experiments: a Maastrichtian (late Cretaceous)
example, Palaeogeogr. Palaeoclimatol. Palaeoecol., 213, 37–63,
https://doi.org/10.1016/j.palaeo.2004.06.015, 2004.
Martin, H. A.: Cenozoic climatic change and the development of the arid vegetation in
Australia, J. Arid Environ., 66, 533–563, https://doi.org/10.1016/j.jaridenv.2006.01.009, 2006.
Martini, E.: Standard Tertiary and Quaternary calcareous nannoplankton zonation, in:
Proc. II Planktonic Conference, Roma 1970, Tecnoscienza, Roma, edited by: Farinacci, A., 739–785,
1971.
Maslin, M. A., Li, X. S., Loutre, M.-F., and Berger, A.: The contribution of orbital
forcing to the progressive intensification of Northern Hemisphere glaciation, Quat. Sci. Rev., 17,
411–426, https://doi.org/10.1016/S0277-3791(97)00047-4, 1998.
Maxbauer, D. P., Royer, D. L., and LePage, B. A.: High Arctic forests during the
middle Eocene supported by moderate levels of atmospheric CO2, Geology, 42, 1027–1030,
https://doi.org/10.1130/G36014.1, 2014.
McElwain, J. C. and Chaloner, W. G.: Stomatal Density and Index of Fossil Plants Track
Atmospheric Carbon Dioxide in the Palaeozoic, Ann. Bot., 76, 389–395,
https://doi.org/10.1006/anbo.1995.1112, 1995.
McElwain, J. C. and Steinthorsdottir, M.: Paleoecology, Ploidy, Paleoatmospheric
Composition, and Developmental Biology: A Review of the Multiple Uses of Fossil Stomata, Plant
Physiol., 174, 650–664, 2017.
McKay, R. M., Barrett, P. J., Levy, R. S., Naish, T. R., Golledge, N. R., and Pyne,
A.: Antarctic Cenozoic climate history from sedimentary records: ANDRILL and beyond,
Philos. Trans. R. Soc. A-Math. Phys., 374, 20140301, https://doi.org/10.1098/rsta.2014.0301, 2016.
McKinley, C. C., Thomas, D. J., LeVay, L. J., and Rolewicz, Z.: Nd isotopic structure
of the Pacific Ocean 40–10 Ma, and evidence for the reorganization of deep North Pacific Ocean
circulation between 36 and 25 Ma, Earth Planet. Sci. Lett., 521, 139–149,
https://doi.org/10.1016/j.epsl.2019.06.009, 2019.
Meng, J. and McKenna, M. C.: Faunal turnovers of Palaeogene mammals from the Mongolian
Plateau, Nature, 394, 364–367, https://doi.org/10.1038/28603, 1998.
Merico, A., Tyrrell, T., and Wilson, P. A.: Eocene/Oligocene ocean de-acidification
linked to Antarctic glaciation by sea-level fall, Nature, 452, 979–982,
https://doi.org/10.1038/nature06853, 2008.
Meyers, J. A.: Terrestrial Eocene-Oligocene vegetation and climate in the Pacific
Northwest, in: From Greenhouse to Icehouse: The Marine Eocene-Oligocene Transition, edited by:
Prothero, D. R., Ivany, L. C., Nesbitt, E. A.,Columbia University Press, New York, 171–185,
2003.
Mihlbachler, M. C., Rivals, F., Solounias, N., and Semprebon, G. M.: Dietary Change
and Evolution of Horses in North America, Science, 331, 1178–1181, https://doi.org/10.1126/science.1196166,
2011.
Mikolajewicz, U., Maier-Reimer, E., Crowley, T. J., and Kim, K.-Y.: Effect of Drake
and Panamanian Gateways on the circulation of an ocean model, Paleoceanography, 8, 409–426,
https://doi.org/10.1029/93PA00893, 1993.
Miller, K. G., Janecek, T. R., Katz, M. E., and Keil, D. J.: Abyssal circulation and
benthic foraminiferal changes near the Paleocene/Eocene boundary, Paleoceanography, 2, 741–761,
https://doi.org/10.1029/PA002i006p00741, 1987.
Miller, K. G., Wright, J. D., and Fairbanks, R. G.: Unlocking the Ice House:
Oligocene-Miocene oxygen isotopes, eustasy, and margin erosion, J. Geophys. Res.-Sol. Ea., 96,
6829–6848, https://doi.org/10.1029/90JB02015, 1991.
Miller, K. G., Browning, J. V, Aubry, M.-P., Wade, B. S., Katz, M. E., Kulpecz, A. A.,
and Wright, J. D.: Eocene–Oligocene global climate and sea-level changes: St. Stephens Quarry,
Alabama, GSA Bull., 120, 34–53, https://doi.org/10.1130/B26105.1, 2008.
Moraweck, K., Grein, M., Konrad, W., Kvaček, J., Kova-Eder, J., Neinhuis, C.,
Traiser, C., and Kunzmann, L.: Leaf traits of long-ranging Paleogene species and their
relationship with depositional facies, climate and atmospheric CO2 level,
Palaeontogr. Abteilung B, 298, 93–172,
https://doi.org/10.1127/palb/2019/0062, 2019.
Mudelsee, M., Bickert, T., Lear, C. H., and Lohmann, G.: Cenozoic climate changes: A
review based on time series analysis of marine benthic δ18O records,
Rev. Geophys., 52, 333–374, https://doi.org/10.1002/2013RG000440, 2014.
Müller, P. J., Kirst, G., Ruhland, G., von Storch, I., and Rosell-Melé, A.:
Calibration of the alkenone paleotemperature index U37K' based on core-tops from the eastern South
Atlantic and the global ocean (60∘ N–60∘ S), Geochim. Cosmochim. Acta, 62,
1757–1772, https://doi.org/10.1016/S0016-7037(98)00097-0, 1998.
Müller, R. D., Sdrolias, M., Gaina, C., and Roest, W. R.: Age, spreading rates,
and spreading asymmetry of the world's ocean crust, Geochem. Geophy. Geosy., 9, Q04006,
https://doi.org/10.1029/2007GC001743, 2008.
Negri, F. R., Bocquentin-Villanueva, J., Ferigolo, J., and Antoine, P.-O.: A Review of
Tertiary Mammal Faunas and Birds from Western Amazonia, in: Amazonia: Landscape and Species
Evolution, Wiley-Blackwell Publishing Ltd., West Sussex, UK, 243–258, 2009.
Nocchi, M., Parisi, G., Monaco, P., Monechi, S., Madile, M., Napoleone, G., Ripepe,
M., Orlando, M., Premoli Silva, I., and Bice, D. M.: The Eocene-Oligocene Boundary in the Umbrian
Pelagic Sequences, Italy, in: terminal eocene events, vol. 9, edited by: Pomerol, C.,
Premoli-Silva, S., Elsevier, Amsterdam, the Netherlands, 25–40, 1986.
Nof, D., Van Gorder, S., and de Boer, A.: Does the Atlantic meridional overturning
cell really have more than one stable steady state?, Deep-Sea Res. Pt. I, 54, 2005–2021,
https://doi.org/10.1016/j.dsr.2007.08.006, 2007.
Norris, R. D. and Wilson, P. A.: Low-latitude sea-surface temperatures for the
mid-Cretaceous and the evolution of planktic foraminifera, Geology, 26, 823–826,
https://doi.org/10.1130/0091-7613(1998)026<0823:LLSSTF>2.3.CO;2, 1998.
O'Brien, C. L., Huber, M., Thomas, E., Pagani, M., Super, J. R., Elder, L. E., and
Hull, P. M.: The enigma of Oligocene climate and global surface temperature evolution,
P. Natl. Acad. Sci. USA, 117, 25302–25309,
https://doi.org/10.1073/pnas.2003914117, 2020.
O'Regan, M., Williams, C. J., Frey, K. E., and Jakobsson, M.: A Synthesis of the
Long-Term Paleoclimatic Evolution of the Arctic, Oceanography, 24, 66–80, https://doi.org/10.5670/oceanog.2011.57, 2011.
Oboh-Ikuenobe, F. E. and Jaramillo, C. A.: Palynological patterns in the uppermost
Eocene to lower Oligocene sedimentary, in: From Greenhouse to Icehouse: The Marine
Eocene-Oligocene Transition, Columbia University Press, New York, USA, 269, 2003.
Olivarez Lyle, A. and Lyle, M. W.: Missing organic carbon in Eocene marine sediments:
Is metabolism the biological feedback that maintains end-member climates?, Paleoceanography, 21,
PA2007, https://doi.org/10.1029/2005PA001230, 2006.
Olivetti, V., Balestrieri, M. L., Rossetti, F., and Talarico, F. M.: Tectonic and
climatic signals from apatite detrital fission track analysis of the Cape Roberts Project core
records, South Victoria Land, Antarctica, Tectonophysics, 594, 80–90,
https://doi.org/10.1016/j.tecto.2013.03.017, 2013.
Olivetti, V., Balestrieri, M. L., Rossetti, F., Thomson, S. N., Talarico, F. M., and
Zattin, M.: Evidence of a full West Antarctic Ice Sheet back to the early Oligocene: insight from
double dating of detrital apatites in Ross Sea sediments, Terra Nov., 27, 238–246,
https://doi.org/10.1111/ter.12153, 2015.
Opdyke, B. N. and Wilkinson, B. H.: Surface area control of shallow cratonic to deep
marine carbonate accumulation, Paleoceanography, 3, 685–703, https://doi.org/10.1029/PA003i006p00685, 1988.
Pagani, M., Zachos, J. C., Freeman, K. H., Tipple, B., and Bohaty, S.: Marked Decline
in Atmospheric Carbon Dioxide Concentrations During the Paleogene, Science, 309, 600–603,
https://doi.org/10.1126/science.1110063, 2005.
Pagani, M., Huber, M., Liu, Z., Bohaty, S. M., Henderiks, J., Sijp, W., Krishnan, S.,
and DeConto, R. M.: The Role of Carbon Dioxide During the Onset of Antarctic Glaciation, Science,
334, 1261–1264, https://doi.org/10.1126/science.1203909, 2011.
Page, M., Licht, A., Dupont-Nivet, G., Meijer, N., Barbolini, N., Hoorn, C., Schauer,
A., Huntington, K., Bajnai, D., Fiebig, J., Mulch, A., and Guo, Z.: Synchronous cooling and
decline in monsoonal rainfall in northeastern Tibet during the fall into the Oligocene icehouse,
Geology, 47, 203–206, https://doi.org/10.1130/G45480.1, 2019.
Palike, H., Lyle, M. W., Nishi, H., Raffi, I., Ridgwell, A., Gamage, K., Klaus, A.,
Acton, G., Anderson, L., Backman, J., Baldauf, J., Beltran, C., Bohaty, S. M., BownPaul, Busch,
W., Channell, J. E. T., Chun, C. O. J., Delaney, M., Dewangan, P., Dunkley Jones, T., Edgar,
K. M., Evans, H., Fitch, P., Foster, G. L., Gussone, N., Hasegawa, H., Hathorne, E. C., Hayashi,
H., Herrle, J. O., Holbourn, A., Hovan, S., Hyeong, K., Iijima, K., Ito, T., Kamikuri, S., Kimoto,
K., Kuroda, J., Leon-Rodriguez, L., Malinverno, A., Moore Jr, T. C., Murphy, B. H., Murphy, D. P.,
Nakamura, H., Ogane, K., Ohneiser, C., Richter, C., Robinson, R., Rohling, E. J., Romero, O.,
Sawada, K., Scher, H., Schneider, L., Sluijs, A., Takata, H., Tian, J., Tsujimoto, A., Wade,
B. S., Westerhold, T., Wilkens, R., Williams, T., Wilson, P. A., Yamamoto, Y., Yamamoto, S.,
Yamazaki, T., and Zeebe, R. E.: A Cenozoic record of the equatorial Pacific carbonate compensation
depth, Nature, 488, 609–614, https://doi.org/10.1038/nature11360, 2012.
Pan, A. D., Jacobs, B. F., Dransfield, J., and Baker, W. J.: The fossil history of
palms (Arecaceae) in Africa and new records from the Late Oligocene (28–27 Mya) of north-western
Ethiopia, Bot. J. Linn. Soc., 151, 69–81, https://doi.org/10.1111/j.1095-8339.2006.00523.x, 2006.
Passchier, S., Bohaty, S. M., Jiménez-Espejo, F., Pross, J., Röhl, U., van de
Flierdt, T., Escutia, C., and Brinkhuis, H.: Early Eocene to middle Miocene cooling and
aridification of East Antarctica, Geochem. Geophy. Geosy., 14, 1399–1410,
https://doi.org/10.1002/ggge.20106, 2013.
Passchier, S., Ciarletta, D. J., Miriagos, T. E., Bijl, P. K., and Bohaty, S. M.: An
Antarctic stratigraphic record of stepwise ice growth through the Eocene-Oligocene transition, GSA
Bull., 129, 318–330, https://doi.org/10.1130/B31482.1, 2017.
Pearson, A. and Ingalls, A. E.: Assessing the Use of Archaeal Lipids as Marine
Environmental Proxies, Annu. Rev. Earth Planet. Sci., 41, 359–384,
https://doi.org/10.1146/annurev-earth-050212-123947, 2013.
Pearson, P. N. and Palmer, M. R.: Middle Eocene Seawater pH and Atmospheric Carbon
Dioxide Concentrations, Science, 284, 1824–1826, https://doi.org/10.1126/science.284.5421.1824, 1999.
Pearson, P. N. and Palmer, M. R.: Atmospheric carbon dioxide concentrations over the
past 60 million years, Nature, 406, 695, https://doi.org/10.1038/35021000, 2000.
Pearson, P. N., Ditchfield, P. W., Singano, J., Harcourt-Brown, K. G., Nicholas,
C. J., Olsson, R. K., Shackleton, N. J., and Hall, M. A.: Warm tropical sea surface temperatures
in the Late Cretaceous and Eocene epochs, Nature, 413, 481–487, https://doi.org/10.1038/35097000, 2001.
Pearson, P. N., van Dongen, B. E., Nicholas, C. J., Pancost, R. D., Schouten, S.,
Singano, J. M., and Wade, B. S.: Stable warm tropical climate through the Eocene Epoch, Geology,
35, 211–214, https://doi.org/10.1130/G23175A.1, 2007.
Pearson, P. N., McMillan, I. K., Wade, B. S., Jones, T. D., Coxall, H. K., Bown,
P. R., and Lear, C. H.: Extinction and environmental change across the Eocene-Oligocene boundary
in Tanzania, Geology, 36, 179–182, https://doi.org/10.1130/G24308A.1, 2008.
Pearson, P. N., Foster, G. L., and Wade, B. S.: Atmospheric carbon dioxide through the
Eocene–Oligocene climate transition, Nature, 461, 1110–1113, https://doi.org/10.1038/nature08447, 2009.
Peck, V. L., Yu, J., Kender, S., and Riesselman, C. R.: Shifting ocean carbonate
chemistry during the Eocene-Oligocene climate transition: Implications for deep-ocean Mg ∕ Ca
paleothermometry, Paleoceanography, 25, PA4219,
https://doi.org/10.1029/2009PA001906, 2010.
Pérez, L. F., Nielsen, T., Knutz, P. C., Kuijpers, A., and Damm, V.: Large-scale
evolution of the central-east Greenland margin: New insights to the North Atlantic glaciation
history, Glob. Planet. Change, 163, 141–157, https://doi.org/10.1016/j.gloplacha.2017.12.010, 2018.
Petersen, S. V and Schrag, D. P.: Antarctic ice growth before and after the
Eocene-Oligocene transition: New estimates from clumped isotope paleothermometry,
Paleoceanography, 30, 1305–1317, https://doi.org/10.1002/2014PA002769, 2015.
Piepjohn, K., von Gosen, W., and Tessensohn, F.: The Eurekan deformation in the
Arctic: an outline, J. Geol. Soc. London, 173, 1007–1024, https://doi.org/10.1144/jgs2016-081, 2016.
Piga, E.: How Hot is Hot? Tropical Ocean Temperatures and Plankton Communities in the
Eocene Epoch, PhD Thesis, Cardiff University, available at: http://orca.cf.ac.uk/136990/, last access: 20 December 2020.
Pocknall, D. T.: Palynostratigraphy of the Te Kuiti Group (late Eocene-Oligocene),
Waikato Basin, New Zealand, New Zeal. J. Geol. Geophys., 34, 407–417,
https://doi.org/10.1080/00288306.1991.9514479, 1991.
Pollard, D.: A retrospective look at coupled ice sheet–climate modeling,
Clim. Change, 100, 173–194, https://doi.org/10.1007/s10584-010-9830-9, 2010.
Pollard, D. and DeConto, R. M.: Hysteresis in Cenozoic Antarctic ice-sheet variations,
Glob. Planet. Change, 45, 9–21, https://doi.org/10.1016/j.gloplacha.2004.09.011, 2005.
Pomerol, C. and Premoli Silva, I. (eds.): The Eocene-Oligocene Transition: Events and
Boundary, in: termbal eocene events, vol. 9, Elsevier,, Amsterdam, the Netherlands, 1–24, 1986.
Postigo Mijarra, J. M., Barrón, E., Gómez Manzaneque, F., and Morla, C.:
Floristic changes in the Iberian Peninsula and Balearic Islands (south-west Europe) during the
Cenozoic, J. Biogeogr., 36, 2025–2043, https://doi.org/10.1111/j.1365-2699.2009.02142.x, 2009.
Pound, M. J. and Salzmann, U.: Heterogeneity in global vegetation and terrestrial
climate change during the late Eocene to early Oligocene transition, Sci. Rep., 7, 43386,
https://doi.org/10.1038/srep43386, 2017.
Premoli Silva, I. and Jenkins, D. G.: Decision on the Eocene-Oligocene boundary
stratotype, Episodes, 16, 379–382, 1993.
Pross, J., Contreras, L., Bijl, P. K., Greenwood, D. R., Bohaty, S. M., Schouten, S.,
Bendle, J. A., Röhl, U., Tauxe, L., Raine, J. I., Huck, C. E., van de Flierdt, T., Jamieson,
S. S. R., Stickley, C. E., van de Schootbrugge, B., Escutia, C., and Brinkhuis, H.: Persistent
near-tropical warmth on the Antarctic continent during the early Eocene epoch, Nature, 488, 73,
https://doi.org/10.1038/nature11300, 2012.
Prothero, D.: Cenozoic Mammals and Climate Change: The Contrast between Coarse-Scale
versus High-Resolution Studies Explained by Species Sorting, Geosciences, 2, 25–41, https://doi.org/10.3390/geosciences2020025, 2012.
Prothero, D. R.: Did impacts, volcanic eruptions, or climate change affect mammalian
evolution?, Palaeogeogr. Palaeoclimatol. Palaeoecol., 214, 283–294,
https://doi.org/10.1016/j.palaeo.2004.04.010, 2004.
Pusz, A. E., Thunell, R. C., and Miller, K. G.: Deep water temperature, carbonate ion,
and ice volume changes across the Eocene-Oligocene climate transition, Paleoceanography, 26,
PA2205, https://doi.org/10.1029/2010PA001950, 2011.
Qin, W., Carlson, L. T., Armbrust, E. V., Devol, A. H., Moffett, J. W., Stahl, D. A.,
and Ingalls, A. E.: Confounding effects of oxygen and temperature on the TEX86 signature of marine
Thaumarchaeota, P. Natl. Acad. Sci. USA, 112, 10979–10984, https://doi.org/10.1073/pnas.1501568112, 2015.
Quade, J., Breecker, D. O., Daëron, M., and Eiler, J.: The paleoaltimetry of
Tibet: An isotopic perspective, Am. J. Sci., 311, 77–115, https://doi.org/10.2475/02.2011.01, 2011.
Quade, J., Leary, R., Dettinger, M. P., Orme, D., Krupa, A., DeCelles, P. G., Kano,
A., Kato, H., Waldrip, R., Huang, W., and Kapp, P.: Resetting Southern Tibet: The serious
challenge of obtaining primary records of Paleoaltimetry, Glob. Planet. Change, 191, 103194,
https://doi.org/10.1016/j.gloplacha.2020.103194, 2020.
Quattrocchio, M. E., Martínez, M. A., Hinojosa, L. F., and Jaramillo, C.:
Quantitative analysis of Cenozoic palynofloras from Patagonia, southern South America, Palynology,
37, 246–258, https://doi.org/10.1080/01916122.2013.787126, 2013.
Raymo, M. E.: The Initiation of Northern Hemisphere Glaciation, Annu. Rev. Earth
Planet. Sci., 22, 353–383, https://doi.org/10.1146/annurev.ea.22.050194.002033, 1994.
Raymo, M. E. and Ruddiman, W. F.: Tectonic forcing of late Cenozoic climate, Nature,
359, 117–122, https://doi.org/10.1038/359117a0, 1992.
Retallack, G. J.: Late Eocene and Oligocene paleosols from Badlands National Park,
South Dakota, Geological Society of America, Boulder, Colorado, USA,
1983.
Retallack, G. J.: A 300-million-year record of atmospheric carbon dioxide from fossil
plant cuticles, Nature, 411, 287, https://doi.org/10.1038/35077041, 2001.
Retallack, G. J., Wynn, J. G., and Fremd, T. J.: Glacial-interglacial–scale
paleoclimatic change without large ice sheets in the Oligocene of central Oregon, Geology, 32,
297–300, https://doi.org/10.1130/G20247.1, 2004.
Ridgway, K. D. and Sweet, A. R.: Climatically induced floristic changes across the
Eocene–Oligocene transition in the northern high latitudes, Yukon Territory, Canada, GSA Bull.,
107, 676–696, https://doi.org/10.1130/0016-7606(1995)107<0676:CIFCAT>2.3.CO;2, 1995.
Robert, C. and Kennett, J. P.: Antarctic continental weathering changes during
Eocene-Oligocene cryosphere expansion: Clay mineral and oxygen isotope evidence, Geology, 25,
587–590, https://doi.org/10.1130/0091-7613(1997)025<0587:ACWCDE>2.3.CO;2, 1997.
Roberts, C. D., LeGrande, A. N., and Tripati, A. K.: Climate sensitivity to Arctic
seaway restriction during the early Paleogene, Earth Planet. Sci. Lett., 286, 576–585,
https://doi.org/10.1016/j.epsl.2009.07.026, 2009.
Roth-Nebelsick, A., Utescher, T., Mosbrugger, V., Diester-Haass, L., and Walther, H.:
Changes in atmospheric CO2 concentrations and climate from the Late Eocene to Early Miocene:
palaeobotanical reconstruction based on fossil floras from Saxony, Germany,
Palaeogeogr. Palaeoclimatol. Palaeoecol., 205, 43–67, https://doi.org/10.1016/j.palaeo.2003.11.014, 2004.
Roth-Nebelsick, A., Grein, M., Utescher, T., and Konrad, W.: Stomatal pore length
change in leaves of Eotrigonobalanus furcinervis (Fagaceae) from the Late Eocene to the Latest
Oligocene and its impact on gas exchange and CO2 reconstruction, Rev. Palaeobot. Palynol.,
174, 106–112, https://doi.org/10.1016/j.revpalbo.2012.01.001, 2012.
Roth-Nebelsick, A., Oehm, C., Grein, M., Utescher, T., Kunzmann, L., Friedrich, J.-P.,
and Konrad, W.: Stomatal density and index data of Platanus neptuni leaf fossils and their
evaluation as a CO2 proxy for the Oligocene, Rev. Palaeobot. Palynol., 206, 1–9,
https://doi.org/10.1016/j.revpalbo.2014.03.001, 2014.
Roth-Nebelsick, A., Grein, M., Traiser, C., Moraweck, K., Kunzmann, L., Kovar-Eder,
J., Kvaček, J., Stiller, S., and Neinhuis, C.: Functional leaf traits and leaf economics in
the Paleogene – A case study for Central Europe, Palaeogeogr. Palaeoclimatol. Palaeoecol., 472,
1–14, https://doi.org/10.1016/j.palaeo.2017.02.008, 2017.
Rowley, D. B. and Currie, B. S.: Palaeo-altimetry of the late Eocene to Miocene
Lunpola basin, central Tibet, Nature, 439, 677–681, https://doi.org/10.1038/nature04506, 2006.
Royer, D. L., Wing, S. L., Beerling, D. J., Jolley, D. W., Koch, P. L., Hickey, L. J.,
and Berner, R. A.: Paleobotanical Evidence for Near Present-Day Levels of Atmospheric CO2
During Part of the Tertiary, Science, 292, 2310–2313, https://doi.org/10.1126/science.292.5525.2310, 2001.
Royer, D. L., Berner, R. A., Montañez, I. P., Tabor, N. J., and Beerling, D. J.:
CO2 as a primary driver of phanerozoic climate, GSA Today, 14, 4–10,
https://doi.org/10.1130/1052-5173(2004)014<4:CAAPDO>2.0.CO;2, 2004.
Sagoo, N., Valdes, P., Flecker, R., and Gregoire, L. J.: The Early Eocene equable
climate problem: can perturbations of climate model parameters identify possible solutions?,
Philos. Trans. R. Soc. A-Math. Phys., 371, 20130123, https://doi.org/10.1098/rsta.2013.0123, 2013.
Schaefer, J. M., Finkel, R. C., Balco, G., Alley, R. B., Caffee, M. W., Briner, J. P.,
Young, N. E., Gow, A. J., and Schwartz, R.: Greenland was nearly ice-free for extended periods
during the Pleistocene, Nature, 540, 252, https://doi.org/10.1038/nature20146, 2016.
Scher, H. D., Bohaty, S. M., Zachos, J. C., and Delaney, M. L.: Two-stepping into the
icehouse: East Antarctic weathering during progressive ice-sheet expansion at the
Eocene–Oligocene transition, Geology, 39, 383–386, https://doi.org/10.1130/G31726.1, 2011.
Scher, H. D., Bohaty, S. M., Smith, B. W., and Munn, G. H.: Isotopic interrogation of
a suspected late Eocene glaciation, Paleoceanography, 29, 628–644, https://doi.org/10.1002/2014PA002648,
2014.
Scher, H. D., Whittaker, J. M., Williams, S. E., Latimer, J. C., Kordesch, W. E. C.,
and Delaney, M. L.: Onset of Antarctic Circumpolar Current 30 million years ago as Tasmanian
Gateway aligned with westerlies, Nature, 523, 580–583, https://doi.org/10.1038/nature14598, 2015.
Schouten, S., Hopmans, E. C., Schefuß, E., and Sinninghe Damsté, J. S.:
Distributional variations in marine crenarchaeotal membrane lipids: a new tool for reconstructing
ancient sea water temperatures?, Earth Planet. Sci. Lett., 204, 265–274,
https://doi.org/10.1016/S0012-821X(02)00979-2, 2002.
Scotese, C.: Atlas of Earth History, PALEOMAP Project, University of Texas, Arlington, USA, ISBN 0-9700020-0-9, 2001.
Scotese, C. R. and Wright, N. M.: PALEOMAP Paleodigital Elevation Models (PaleoDEMS)
for the Phanerozoic PALEOMAP Project, available at:
https://www.earthbyte.org/paleodem-resource-scotese-and-wright-2018 (access date: 15 August 2019), 2018.
Scotese, C. R., Gahagan, L. M., and Larson, R. L.: Plate tectonic reconstructions of
the Cretaceous and Cenozoic ocean basins, Tectonophysics, 155, 27–48,
https://doi.org/10.1016/0040-1951(88)90259-4, 1988.
Selkin, P. A., Strömberg, C. A. E., Dunn, R., Kohn, M. J., Carlini, A. A.,
Davies-Vollum, K. S., and Madden, R. H.: Climate, dust, and fire across the Eocene-Oligocene
transition, Patagonia, Geology, 43, 567–570, https://doi.org/10.1130/G36664.1, 2015.
Seton, M., Müller, R. D., Zahirovic, S., Gaina, C., Torsvik, T., Shephard, G.,
Talsma, A., Gurnis, M., Turner, M., Maus, S., and Chandler, M.: Global continental and ocean basin
reconstructions since 200Ma, Earth-Sci. Rev., 113, 212–270,
https://doi.org/10.1016/j.earscirev.2012.03.002, 2012.
Sewall, J. O., Sloan, L. C., Huber, M., and Wing, S.: Climate sensitivity to changes
in land surface characteristics, Glob. Planet. Change, 26, 445–465,
https://doi.org/10.1016/S0921-8181(00)00056-4, 2000.
Sexton, P. F., Wilson, P. A., and Pearson, P. N.: Microstructural and geochemical
perspectives on planktic foraminiferal preservation: “Glassy” versus “Frosty,”
Geochem. Geophy. Geosy., 7, Q12P19,
https://doi.org/10.1029/2006GC001291, 2006.
Shackleton, N. J. and Kennett, J. P.: Paleotemperature History of the Cenozoic and the
Initiation of Antarctic Glaciation: Oxygen and Carbon Isotope Analyses in DSDP Sites 277, 279 and
281, Initial Rep. Deep Sea Drill. Proj., 29,
743, https://doi.org/10.2973/dsdp.proc.29.117.1975, 1975.
Shackleton, N. J., Backman, J., Zimmerman, H., Kent, D. V, Hall, M. A., Roberts,
D. G., Schnitker, D., Baldauf, J. G., Desprairies, A., Homrighausen, R., Huddlestun, P., Keene,
J. B., Kaltenback, A. J., Krumsiek, K. A. O., Morton, A. C., Murray, J. W., and Westberg-Smith,
J.: Oxygen isotope calibration of the onset of ice-rafting and history of glaciation in the North
Atlantic region, Nature, 307, 620–623, https://doi.org/10.1038/307620a0, 1984.
Sheldon, N. D. and Tabor, N. J.: Quantitative paleoenvironmental and paleoclimatic
reconstruction using paleosols, Earth-Sci. Rev., 95, 1–52, https://doi.org/10.1016/j.earscirev.2009.03.004,
2009.
Sheldon, N. D., Costa, E., Cabrera, L., and Garcés, M.: Continental Climatic and
Weathering Response to the Eocene-Oligocene Transition, J. Geol., 120, 227–236,
https://doi.org/10.1086/663984, 2012.
Sheldon, N. D., Grimes, S. T., Hooker, J. J., Collinson, M. E., Bugler, M. J., Hren,
M. T., Price, G. D., and Sutton, P. A.: Coupling of marine and continental oxygen isotope records
during the Eocene-Oligocene transition, GSA Bull., 128, 502–510, https://doi.org/10.1130/B31315.1, 2016.
Shellito, C. J., Sloan, L. C., and Huber, M.: Climate model sensitivity to atmospheric
CO2 levels in the Early–Middle Paleogene, Palaeogeogr. Palaeoclimatol. Palaeoecol., 193,
113–123, https://doi.org/10.1016/S0031-0182(02)00718-6, 2003.
Sijp, W. P. and England, M. H.: Effect of the Drake Passage Throughflow on Global
Climate, J. Phys. Oceanogr., 34, 1254–1266,
https://doi.org/10.1175/1520-0485(2004)034<1254:EOTDPT>2.0.CO;2, 2004.
Sijp, W. P., England, M. H., and Toggweiler, J. R.: Effect of Ocean Gateway Changes
under Greenhouse Warmth, J. Clim., 22, 6639–6652, https://doi.org/10.1175/2009JCLI3003.1, 2009.
Sijp, W. P., England, M. H., and Huber, M.: Effect of the deepening of the Tasman
Gateway on the global ocean, Paleoceanography, 26, PA4207, https://doi.org/10.1029/2011PA002143, 2011.
Sijp, W. P., von der Heydt, A. S., Dijkstra, H. A., Flögel, S., Douglas, P. M. J.,
and Bijl, P. K.: The role of ocean gateways on cooling climate on long time scales,
Glob. Planet. Change, 119, 1–22, https://doi.org/10.1016/j.gloplacha.2014.04.004, 2014.
Sijp, W. P., von der Heydt, A. S., and Bijl, P. K.: Model simulations of early westward flow across the Tasman Gateway during the early Eocene, Clim. Past, 12, 807–817, https://doi.org/10.5194/cp-12-807-2016, 2016.
Śliwińska, K. K., Thomsen, E., Schouten, S., Schoon, P. L., and
Heilmann-Clausen, C.: Climate- and gateway-driven cooling of Late Eocene to earliest Oligocene sea
surface temperatures in the North Sea Basin, Sci. Rep., 9, 4458, https://doi.org/10.1038/s41598-019-41013-7,
2019.
Sluijs, A., Schouten, S., Donders, T. H., Schoon, P. L., Röhl, U., Reichart,
G.-J., Sangiorgi, F., Kim, J.-H., Sinninghe Damsté, J. S., and Brinkhuis, H.: Warm and wet
conditions in the Arctic region during Eocene Thermal Maximum 2, Nat. Geosci., 2, 777,
https://doi.org/10.1038/ngeo668, 2009.
Solgaard, A. M., Bonow, J. M., Langen, P. L., Japsen, P., and Hvidberg, C. S.:
Mountain building and the initiation of the Greenland Ice Sheet,
Palaeogeogr. Palaeoclimatol. Palaeoecol., 392, 161–176, https://doi.org/10.1016/j.palaeo.2013.09.019, 2013.
Sorlien, C. C., Luyendyk, B. P., Wilson, D. S., Decesari, R. C., Bartek, L. R., and
Diebold, J. B.: Oligocene development of the West Antarctic Ice Sheet recorded in eastern Ross Sea
strata, Geology, 35, 467–470, https://doi.org/10.1130/G23387A.1, 2007.
Sosdian, S. M., Greenop, R., Hain, M. P., Foster, G. L., Pearson, P. N., and Lear,
C. H.: Constraining the evolution of Neogene ocean carbonate chemistry using the boron isotope pH
proxy, Earth Planet. Sci. Lett., 498, 362–376, https://doi.org/10.1016/j.epsl.2018.06.017, 2018.
Spray, J. F., Bohaty, S. M., Davies, A., Bailey, I., Romans, B. W., Cooper, M. J.,
Milton, J. A., and Wilson, P. A.: North Atlantic Evidence for a Unipolar Icehouse Climate State at
the Eocene-Oligocene Transition, Paleoceanogr. Paleoclimatology, 34, 1124–1138,
https://doi.org/10.1029/2019PA003563, 2019.
Srokosz, M. A. and Bryden, H. L.: Observing the Atlantic Meridional Overturning
Circulation yields a decade of inevitable surprises, Science, 348, 1255575, https://doi.org/10.1126/science.1255575, 2015.
Stärz, M., Jokat, W., Knorr, G., and Lohmann, G.: Threshold in North
Atlantic-Arctic Ocean circulation controlled by the subsidence of the Greenland-Scotland Ridge,
Nat. Commun., 8, 15681, https://doi.org/10.1038/ncomms15681, 2017.
Steinthorsdottir, M. and Vajda, V.: Early Jurassic (late Pliensbachian) CO2
concentrations based on stomatal analysis of fossil conifer leaves from eastern Australia,
Gondwana Res., 27, 932–939, https://doi.org/10.1016/j.gr.2013.08.021, 2015.
Steinthorsdottir, M., Jeram, A. J., and McElwain, J. C.: Extremely elevated CO2
concentrations at the Triassic/Jurassic boundary, Palaeogeogr. Palaeoclimatol. Palaeoecol., 308,
418–432, https://doi.org/10.1016/j.palaeo.2011.05.050, 2011.
Steinthorsdottir, M., Wohlfarth, B., Kylander, M. E., Blaauw, M., and Reimer, P. J.:
Stomatal proxy record of CO2 concentrations from the last termination suggests an
important role for CO2 at climate change transitions, Quat. Sci. Rev., 68, 43–58,
https://doi.org/10.1016/j.quascirev.2013.02.003, 2013.
Steinthorsdottir, M., Porter, A. S., Holohan, A., Kunzmann, L., Collinson, M., and McElwain, J. C.: Fossil plant stomata indicate decreasing atmospheric CO2 prior to the Eocene–Oligocene boundary, Clim. Past, 12, 439–454, https://doi.org/10.5194/cp-12-439-2016, 2016.
Steinthorsdottir, M., Vajda, V., Pole, M., and Holdgate, G.: Moderate levels of Eocene
pCO2 indicated by Southern Hemisphere fossil plant stomata, Geology, 47, 914–918, https://doi.org/10.1130/G46274.1, 2019.
Steinthorsdottir, M., Jardine, P. E., and Rember, W. C.: Near-Future pCO2
during the hot Mid Miocene Climatic Optimum, Paleoceanogr. Paleoclimatol., 36, e2020PA003900, https://doi.org/10.1029/2020PA003900, 2021.
Stickley, C. E., Brinkhuis, H., Schellenberg, S. A., Sluijs, A., Röhl, U., Fuller,
M., Grauert, M., Huber, M., Warnaar, J., and Williams, G. L.: Timing and nature of the deepening
of the Tasmanian Gateway, Paleoceanography, 19, PA4027, https://doi.org/10.1029/2004PA001022, 2004.
Stickley, C. E., St John, K., Koç, N., Jordan, R. W., Passchier, S., Pearce,
R. B., and Kearns, L. E.: Evidence for middle Eocene Arctic sea ice from diatoms and ice-rafted
debris, Nature, 460, 376–379, https://doi.org/10.1038/nature08163, 2009.
St. John, K.: Cenozoic ice-rafting history of the central Arctic Ocean: Terrigenous
sands on the Lomonosov Ridge, Paleoceanography, 23, PA1S05, https://doi.org/10.1029/2007PA001483, 2008.
Stocchi, P., Escutia, C., Houben, A. J. P., Vermeersen, B. L. A., Bijl, P. K.,
Brinkhuis, H., DeConto, R. M., Galeotti, S., Passchier, S., Pollard, D., Brinkhuis, H., Escutia,
C., Klaus, A., Fehr, A., Williams, T., Bendle, J. A. P., Bijl, P. K., Bohaty, S. M., Carr, S. A.,
Dunbar, R. B., Flores, J. A., Gonzàlez, J. J., Hayden, T. G., Iwai, M., Jimenez-Espejo, F. J.,
Katsuki, K., Kong, G. S., McKay, R. M., Nakai, M., Olney, M. P., Passchier, S., Pekar, S. F.,
Pross, J., Riesselman, C., Röhl, U., Sakai, T., Shrivastava, P. K., Stickley, C. E., Sugisaki,
S., Tauxe, L., Tuo, S., van de Flierdt, T., Welsh, K., and Yamane, M.: Relative sea-level rise
around East Antarctica during Oligocene glaciation, Nat. Geosci., 6, 380, https://doi.org/10.1038/ngeo1783,
2013.
Strömberg, C. A. E., Dunn, R. E., Madden, R. H., Kohn, M. J., and Carlini, A. A.:
Decoupling the spread of grasslands from the evolution of grazer-type herbivores in South America,
Nat. Commun., 4, 1478, https://doi.org/10.1038/ncomms2508, 2013.
Strother, S. L., Salzmann, U., Sangiorgi, F., Bijl, P. K., Pross, J., Escutia, C., Salabarnada, A., Pound, M. J., Voss, J., and Woodward, J.: A new quantitative approach to identify reworking in Eocene to Miocene pollen records from offshore Antarctica using red fluorescence and digital imaging, Biogeosciences, 14, 2089–2100, https://doi.org/10.5194/bg-14-2089-2017, 2017.
Su, T., Li, S.-F., Tang, H., Huang, Y.-J., Li, S.-H., Deng, C.-L., and Zhou, Z.-K.:
Hemitrapa Miki (Lythraceae) from the earliest Oligocene of southeastern Qinghai-Tibetan Plateau
and its phytogeographic implications, Rev. Palaeobot. Palynol., 257, 57–63,
https://doi.org/10.1016/j.revpalbo.2018.06.001, 2018.
Sun, J. and Windley, B. F.: Onset of aridification by 34 Ma across the
Eocene-Oligocene transition in Central Asia, Geology, 43, 1015–1018, https://doi.org/10.1130/G37165.1,
2015.
Sun, J., Ni, X., Bi, S., Wu, W., Ye, J., Meng, J., and Windley, B. F.: Synchronous
turnover of flora, fauna, and climate at the Eocene–Oligocene Boundary in Asia, Sci. Rep., 4,
7463, https://doi.org/10.1038/srep07463, 2014.
Swart, P. K.: Global synchronous changes in the carbon isotopic composition of
carbonate sediments unrelated to changes in the global carbon cycle, P. Natl. Acad. Sci. USA, 105,
13741–13745, https://doi.org/10.1073/pnas.0802841105, 2008.
Swart, P. K. and Eberli, G.: The nature of the δ13C of periplatform sediments:
Implications for stratigraphy and the global carbon cycle, Sediment. Geol., 175, 115–129,
https://doi.org/10.1016/j.sedgeo.2004.12.029, 2005.
Teodoridis, V. and Kvaček, Z.: Palaeoenvironmental evaluation of cainozoic plant
assemblages from the Bohemian Massif (Czech Republic) and adjacent Germany, Bull. Geosci., 90,
695–720, https://doi.org/10.3140/bull.geosci.1553, 2015.
Thomas, D. J., Korty, R., Huber, M., Schubert, J. A., and Haines, B.: Nd isotopic
structure of the Pacific Ocean 70-30 Ma and numerical evidence for vigorous ocean circulation and
ocean heat transport in a greenhouse world, Paleoceanography, 29, 454–469,
https://doi.org/10.1002/2013PA002535, 2014.
Thomson, S. N., Reiners, P. W., Hemming, S. R., and Gehrels, G. E.: The contribution
of glacial erosion to shaping the hidden landscape of East Antarctica, Nat. Geosci., 6, 203,
https://doi.org/10.1038/ngeo1722, 2013.
Tierney, J. E. and Tingley, M. P.: A TEX86 surface sediment database and extended
Bayesian calibration, Sci. Data, 2, 150029, https://doi.org/10.1038/sdata.2015.29, 2015.
Tiffney, B. H. and Wing, S. L.: Paleoenvironment of the Oligocene Jebel Qatrani Formation, Fayum depression, northern Egypt, based on floral remains, in: 23rd meeting of the Geological Society of America, 21–24 October 1991, San Diego, CA, USA, 1991.
Tigchelaar, M., von der Heydt, A. S., and Dijkstra, H. A.: A new mechanism for the two-step δ11B signal at the Eocene-Oligocene boundary, Clim. Past, 7, 235–247, https://doi.org/10.5194/cp-7-235-2011, 2011.
Toggweiler, J. R. and Bjornsson, H.: Drake Passage and palaeoclimate, J. Quat. Sci.,
15, 319–328, https://doi.org/10.1002/1099-1417(200005)15:4<319::AID-JQS545>3.0.CO;2-C,
2000.
Torsvik, T. H., Van der Voo, R., Preeden, U., Mac Niocaill, C., Steinberger, B.,
Doubrovine, P. V, van Hinsbergen, D. J. J., Domeier, M., Gaina, C., Tohver, E., Meert, J. G.,
McCausland, P. J. A., and Cocks, L. R. M.: Phanerozoic polar wander, palaeogeography and dynamics,
Earth-Sci. Rev., 114, 325–368, https://doi.org/10.1016/j.earscirev.2012.06.007, 2012.
Tripati, A. and Darby, D.: Evidence for ephemeral middle Eocene to early Oligocene
Greenland glacial ice and pan-Arctic sea ice, Nat. Commun., 9, 1038,
https://doi.org/10.1038/s41467-018-03180-5, 2018.
Tripati, A., Backman, J., Elderfield, H., and Ferretti, P.: Eocene bipolar glaciation
associated with global carbon cycle changes, Nature, 436, 341, https://doi.org/10.1038/nature03874, 2005.
Tripati, A. K., Eagle, R. A., Morton, A., Dowdeswell, J. A., Atkinson, K. L.,
Bahé, Y., Dawber, C. F., Khadun, E., Shaw, R. M. H., Shorttle, O. and Thanabalasundaram, L.:
Evidence for glaciation in the Northern Hemisphere back to 44 Ma from ice-rafted debris in the
Greenland Sea, Earth Planet. Sci. Lett., 265, 112–122,
https://doi.org/10.1016/j.epsl.2007.09.045, 2008.
Vahlenkamp, M., Niezgodzki, I., De Vleeschouwer, D., Bickert, T., Harper, D., Kirtland
Turner, S., Lohmann, G., Sexton, P., Zachos, J., and Pälike, H.: Astronomically paced changes
in deep-water circulation in the western North Atlantic during the middle Eocene, Earth
Planet. Sci. Lett., 484, 329–340, https://doi.org/10.1016/j.epsl.2017.12.016, 2018a.
Vahlenkamp, M., Niezgodzki, I., De Vleeschouwer, D., Lohmann, G., Bickert, T., and
Pälike, H.: Ocean and climate response to North Atlantic seaway changes at the onset of
long-term Eocene cooling, Earth Planet. Sci. Lett., 498, 185–195,
https://doi.org/10.1016/j.epsl.2018.06.031, 2018b.
Via, R. K. and Thomas, D. J.: Evolution of Atlantic thermohaline circulation: Early
Oligocene onset of deep-water production in the North Atlantic, Geology, 34, 441–444,
https://doi.org/10.1130/G22545.1, 2006.
Viebahn, J. P., von der Heydt, A. S., Le Bars, D., and Dijkstra, H. A.: Effects of
Drake Passage on a strongly eddying global ocean, Paleoceanography, 31, 564–581,
https://doi.org/10.1002/2015PA002888, 2016.
van Hinsbergen, D. J. J., de Groot, L. V, van Schaik, S. J., Spakman, W., Bijl, P. K.,
Sluijs, A., Langereis, C. G., and Brinkhuis, H.: A Paleolatitude Calculator for Paleoclimate
Studies., PLoS One, 10, e0126946, https://doi.org/10.1371/journal.pone.0126946, 2015.
Waddell, L. M. and Moore, T. C.: Salinity of the Eocene Arctic Ocean from oxygen
isotope analysis of fish bone carbonate, Paleoceanography, 23, PA1S12, https://doi.org/10.1029/2007PA001451,
2008.
Wade, B. S. and Pearson, P. N.: Planktonic foraminiferal turnover, diversity
fluctuations and geochemical signals across the Eocene/Oligocene boundary in Tanzania,
Mar. Micropaleontol., 68, 244–255, https://doi.org/10.1016/j.marmicro.2008.04.002, 2008.
Wade, B. S., Pearson, P. N., Berggren, W. A., and Pälike, H.: Review and revision
of Cenozoic tropical planktonic foraminiferal biostratigraphy and calibration to the geomagnetic
polarity and astronomical time scale, Earth-Sci. Rev., 104, 111–142,
https://doi.org/10.1016/j.earscirev.2010.09.003, 2011.
Wade, B. S., Houben, A. J. P., Quaijtaal, W., Schouten, S., Rosenthal, Y., Miller,
K. G., Katz, M. E., Wright, J. D., and Brinkhuis, H.: Multiproxy record of abrupt sea-surface
cooling across the Eocene-Oligocene transition in the Gulf of Mexico, Geology, 40, 159–162,
https://doi.org/10.1130/G32577.1, 2012.
Wagner, F., Below, R., Klerk, P. D., Dilcher, D. L., Joosten, H., Kürschner,
W. M., and Visscher, H.: A natural experiment on plant acclimation: lifetime stomatal frequency
response of an individual tree to annual atmospheric CO2 increase,
P. Natl. Acad. Sci. USA, 93, 11705–11708, https://doi.org/10.1073/pnas.93.21.11705, 1996.
Walker, J. C. G., Hays, P. B., and Kasting, J. F.: A negative feedback mechanism for
the long-term stabilization of Earth's surface temperature, J. Geophys. Res.-Ocean, 86,
9776–9782, https://doi.org/10.1029/JC086iC10p09776, 1981.
Wei, W.: Opening of the Australia–Antarctica Gateway as dated by nannofossils,
Mar. Micropaleontol., 52, 133–152, https://doi.org/10.1016/j.marmicro.2004.04.008, 2004.
Wellner, J. S., Anderson, J. B., Ehrmann, W., Weaver, F. M., Kirshner, A., Livsey, D.,
and Simms, A. R.: History of an Evolving Ice Sheet as Recorded in SHALDRIL Cores from the
Northwestern Weddell Sea, Antarctica, in: Tectonic, Climatic, and Cryospheric Evolution of the
Antarctic Peninsula, American Geophysical Union, Washington, DC, USA,
131–151, 2011.
Westerhold, T., Marwan, N., Drury, A. J., Liebrand, D., Agnini, C., Anagnostou, E.,
Barnet, J. S. K., Bohaty, S. M., De Vleeschouwer, D., Florindo, F., Frederichs, T., Hodell, D. A.,
Holbourn, A. E., Kroon, D., Lauretano, V., Littler, K., Lourens, L. J., Lyle, M., Pälike, H.,
Röhl, U., Tian, J., Wilkens, R. H., Wilson, P. A., and Zachos, J. C.: An astronomically dated
record of Earth's climate and its predictability over the last 66 million years, Science, 369,
1383–1387, https://doi.org/10.1126/science.aba6853, 2020.
Williams, S. E., Whittaker, J. M., and Müller, R. D.: Full-fit, palinspastic
reconstruction of the conjugate Australian-Antarctic margins, Tectonics, 30, TC6012,
https://doi.org/10.1029/2011TC002912, 2011.
Wilson, D. S. and Luyendyk, B. P.: West antarctic paleotopography estimated at the
eocene-oligocene climate transition, Geophys. Res. Lett., 36, 10–13, https://doi.org/10.1029/2009GL039297,
2009.
Wilson, D. S., Jamieson, S. S. R., Barrett, P. J., Leitchenkov, G., Gohl, K. and
Larter, R. D.: Antarctic topography at the Eocene–Oligocene boundary,
Palaeogeogr. Palaeoclimatol. Palaeoecol., 335–336, 24–34, https://doi.org/10.1016/j.palaeo.2011.05.028,
2012.
Wilson, D. S., Pollard, D., DeConto, R. M., Jamieson, S. S. R., and Luyendyk, B. P.:
Initiation of the West Antarctic Ice Sheet and estimates of total Antarctic ice volume in the
earliest Oligocene, Geophys. Res. Lett., 40, 4305–4309, https://doi.org/10.1002/grl.50797, 2013.
Wilson, P. A. and Norris, R. D.: Warm tropical ocean surface and global anoxia during
the mid-Cretaceous period, Nature, 412, 425–429, https://doi.org/10.1038/35086553, 2001.
Wilson, P. A., Norris, R. D., and Cooper, M. J.: Testing the Cretaceous greenhouse
hypothesis using glassy foraminiferal calcite from the core of the Turonian tropics on Demerara
Rise, Geology, 30, 607–610,
https://doi.org/10.1130/0091-7613(2002)030<0607:TTCGHU>2.0.CO;2, 2002.
Wing, S. L.: Eocene and Oligocene Floras and Vegetation of the Rocky Mountains,
Ann. Missouri Bot. Gard., 74, 748–784,
https://doi.org/10.2307/2399449, 1987.
Wing, S. L., Hasiotis, S. T., and Bown, T. M.: First ichnofossils of flank-buttressed
trees (late Eocene), Fayum Depression, Egypt, Ichnos, 3, 281–286,
https://doi.org/10.1080/10420949509386398, 1995.
Winguth, A., Shellito, C., Shields, C., and Winguth, C.: Climate Response at the
Paleocene–Eocene Thermal Maximum to Greenhouse Gas Forcing – A Model Study with CCSM3, J. Clim.,
23, 2562–2584, https://doi.org/10.1175/2009JCLI3113.1, 2010.
Wolfe, J. A.: Distribution of Major Vegetational Types During the Tertiary, in: The Carbon Cycle and Atmospheric CO2: Natural Variations Archean to Present, American Geophysical Union, Washington, DC, USA, 357–375, 1985.
Wolfe, J. A.: Tertiary climatic changes at middle latitudes of western North America,
Palaeogeogr. Palaeoclimatol. Palaeoecol., 108, 195–205, https://doi.org/10.1016/0031-0182(94)90233-X, 1994.
Woodburne, M. O., Goin, F. J., Bond, M., Carlini, A. A., Gelfo, J. N., López,
G. M., Iglesias, A., and Zimicz, A. N.: Paleogene land mammal faunas of South America; a response
to global climatic changes and indigenous floral diversity, J. Mamm. Evol., 21, 1–73,
https://doi.org/10.1007/s10914-012-9222-1, 2014.
Woodward, F. I.: Stomatal numbers are sensitive to increases in CO2 from
pre-industrial levels, Nature, 327, 617, https://doi.org/10.1038/327617a0, 1987.
Xiao, G. Q., Abels, H. A., Yao, Z. Q., Dupont-Nivet, G., and Hilgen, F. J.: Asian aridification linked to the first step of the Eocene-Oligocene climate Transition (EOT) in obliquity-dominated terrestrial records (Xining Basin, China), Clim. Past, 6, 501–513, https://doi.org/10.5194/cp-6-501-2010, 2010.
Yancey, T. E., Elsik, W. C., and Sancay, R. H.: The palynological record of late
Eocene climate change, northwest Gulf of Mexico, in: From Greenhouse to Icehouse: The Marine
Eocene-Oligocene Transition, Columbia University Press, New York, 252–268, 2003.
Yang, J., Spicer, R. A., Spicer, T. E. V., and Li, C.-S.: “CLAMP Online”: a new
web-based palaeoclimate tool and its application to the terrestrial Paleogene and Neogene of North
America, Palaeobiodiv. Palaeoenviron., 91, 163, https://doi.org/10.1007/s12549-011-0056-2, 2011.
Yang, S., Galbraith, E. and Palter, J.: Coupled climate impacts of the Drake Passage
and the Panama Seaway, Clim. Dynam., 43, 37–52, https://doi.org/10.1007/s00382-013-1809-6, 2014.
Young, D. A., Wright, A. P., Roberts, J. L., Warner, R. C., Young, N. W., Greenbaum,
J. S., Schroeder, D. M., Holt, J. W., Sugden, D. E., Blankenship, D. D., van Ommen, T. D., and
Siegert, M. J.: A dynamic early East Antarctic Ice Sheet suggested by ice-covered fjord
landscapes, Nature, 474, 72, https://doi.org/10.1038/nature10114, 2011.
Zaarur, S., Affek, H. P., and Brandon, M. T.: A revised calibration of the clumped
isotope thermometer, Earth Planet. Sci. Lett., 382, 47–57, https://doi.org/10.1016/j.epsl.2013.07.026,
2013.
Zachos, J., Pagani, M., Sloan, L., Thomas, E., and Billups, K.: Trends, Rhythms, and
Aberrations in Global Climate 65 Ma to Present, Science, 292, 686–693,
https://doi.org/10.1126/science.1059412, 2001.
Zachos, J. C. and Kump, L. R.: Carbon cycle feedbacks and the initiation of Antarctic
glaciation in the earliest Oligocene, Glob. Planet. Change, 47, 51–66,
https://doi.org/10.1016/j.gloplacha.2005.01.001, 2005.
Zachos, J. C., Breza, J. R., and Wise, S. W.: Early Oligocene ice-sheet expansion on
Antarctica: Stable isotope and sedimentological evidence from Kerguelen Plateau, southern Indian
Ocean, Geology, 20, 569–573, 1992.
Zachos, J. C., Quinn, T. M., and Salamy, K. A.: High-resolution (104 years)
deep-sea foraminiferal stable isotope records of the Eocene-Oligocene climate transition,
Paleoceanography, 11, 251–266, https://doi.org/10.1029/96PA00571, 1996.
Zachos, J. C., Dickens, G. R., and Zeebe, R. E.: An early Cenozoic perspective on
greenhouse warming and carbon-cycle dynamics, Nature, 451, 279–83, https://doi.org/10.1038/nature06588,
2008.
Zanazzi, A., Kohn, M. J., MacFadden, B. J., and Terry, D. O.: Large temperature drop
across the Eocene–Oligocene transition in central North America, Nature, 445, 639,
https://doi.org/10.1038/nature05551, 2007.
Zhang, Y. G., Pagani, M., Liu, Z., Bohaty, S. M., and DeConto, R.: A 40-million-year
history of atmospheric CO2, Philos. Trans. R. Soc. London A-Math. Phys., 371, 20130096, https://doi.org/10.1098/rsta.2013.0096, 2013.
Zhang, Z., Nisancioglu, K. H., Flatøy, F., Bentsen, M., Bethke, I., and Wang, H.: Tropical seaways played a more important role than high latitude seaways in Cenozoic cooling, Clim. Past, 7, 801–813, https://doi.org/10.5194/cp-7-801-2011, 2011.
Zhang, Z., Ramstein, G., Schuster, M., Li, C., Contoux, C., and Yan, Q.: Aridification
of the Sahara desert caused by Tethys Sea shrinkage during the Late Miocene, Nature, 513, 401,
https://doi.org/10.1038/nature13705, 2014.
Zhang, Z. S., Nisancioglu, K., Bentsen, M., Tjiputra, J., Bethke, I., Yan, Q., Risebrobakken, B., Andersson, C., and Jansen, E.: Pre-industrial and mid-Pliocene simulations with NorESM-L, Geosci. Model Dev., 5, 523–533, https://doi.org/10.5194/gmd-5-523-2012, 2012.
Zhu, J., Poulsen, C. J., and Tierney, J. E.: Simulation of Eocene extreme warmth and
high climate sensitivity through cloud feedbacks, Sci. Adv., 5, eaax1874,
https://doi.org/10.1126/sciadv.aax1874, 2019.
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Short summary
The Eocene–Oligocene transition was a major climate cooling event from a largely ice-free world to the first major glaciation of Antarctica, approximately 34 million years ago. This paper reviews observed changes in temperature, CO2 and ice sheets from marine and land-based records at this time. We present a new model–data comparison of this transition and find that CO2-forced cooling provides the best explanation of the observed global temperature changes.
The Eocene–Oligocene transition was a major climate cooling event from a largely ice-free world...
