Articles | Volume 18, issue 2
https://doi.org/10.5194/cp-18-381-2022
© Author(s) 2022. 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-18-381-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
02 Mar 2022
Research article |
| 02 Mar 2022
| 02 Mar 2022
Summer sea-ice variability on the Antarctic margin during the last glacial period reconstructed from snow petrel (Pagodroma nivea) stomach-oil deposits
Erin L. McClymont
CORRESPONDING AUTHOR
Department of Geography, Durham University, Durham, DH1 3LE, United
Kingdom
Michael J. Bentley
Department of Geography, Durham University, Durham, DH1 3LE, United
Kingdom
Dominic A. Hodgson
British Antarctic Survey, Natural Environment Research Council,
Cambridge, CB3 0ET, United Kingdom
Department of Geography, Durham University, Durham, DH1 3LE, United
Kingdom
Charlotte L. Spencer-Jones
Department of Geography, Durham University, Durham, DH1 3LE, United
Kingdom
Thomas Wardley
Department of Geography, Durham University, Durham, DH1 3LE, United
Kingdom
Martin D. West
Department of Geography, Durham University, Durham, DH1 3LE, United
Kingdom
Ian W. Croudace
Ocean and Earth Science, University of Southampton, National
Oceanography Centre, Southampton, SO14 3ZH, United Kingdom
Sonja Berg
Institute of Geology and Mineralogy, University of Cologne, 50674 Cologne, Germany
Darren R. Gröcke
Department of Earth Science, Durham University, Durham, DH1 3LE,
United Kingdom
Gerhard Kuhn
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und
Meeresforschung, 27568 Bremerhaven, Germany
Stewart S. R. Jamieson
Department of Geography, Durham University, Durham, DH1 3LE, United
Kingdom
Louise Sime
British Antarctic Survey, Natural Environment Research Council,
Cambridge, CB3 0ET, United Kingdom
Richard A. Phillips
British Antarctic Survey, Natural Environment Research Council,
Cambridge, CB3 0ET, United Kingdom
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Oliver J. Marsh, Adrian J. Luckman, and Dominic A. Hodgson
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Tobias Roylands, Robert G. Hilton, Erin L. McClymont, Mark H. Garnett, Guillaume Soulet, Sébastien Klotz, Mathis Degler, Felipe Napoleoni, and Caroline Le Bouteiller
Earth Surf. Dynam., 12, 271–299, https://doi.org/10.5194/esurf-12-271-2024, https://doi.org/10.5194/esurf-12-271-2024, 2024
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Hannah J. Picton, Chris R. Stokes, Stewart S. R. Jamieson, Dana Floricioiu, and Lukas Krieger
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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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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
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Irene Malmierca-Vallet, Louise C. Sime, and the D–O community members
Clim. Past, 19, 915–942, https://doi.org/10.5194/cp-19-915-2023, https://doi.org/10.5194/cp-19-915-2023, 2023
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Michael J. Bentley, James A. Smith, Stewart S. R. Jamieson, Margaret R. Lindeman, Brice R. Rea, Angelika Humbert, Timothy P. Lane, Christopher M. Darvill, Jeremy M. Lloyd, Fiamma Straneo, Veit Helm, and David H. Roberts
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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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Maria Vittoria Guarino, Louise C. Sime, Rachel Diamond, Jeff Ridley, and David Schroeder
Clim. Past, 19, 865–881, https://doi.org/10.5194/cp-19-865-2023, https://doi.org/10.5194/cp-19-865-2023, 2023
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We investigate the response of the atmosphere, ocean, and ice domains to the release of a large volume of glacial meltwaters thought to have occurred during the Last Interglacial period. We show that the signal that originated in the North Atlantic travels over great distances across the globe. It modifies the ocean gyre circulation in the Northern Hemisphere as well as the belt of westerly winds in the Southern Hemisphere, with consequences for Antarctic sea ice.
James A. Smith, Louise Callard, Michael J. Bentley, Stewart S. R. Jamieson, Maria Luisa Sánchez-Montes, Timothy P. Lane, Jeremy M. Lloyd, Erin L. McClymont, Christopher M. Darvill, Brice R. Rea, Colm O'Cofaigh, Pauline Gulliver, Werner Ehrmann, Richard S. Jones, and David H. Roberts
The Cryosphere, 17, 1247–1270, https://doi.org/10.5194/tc-17-1247-2023, https://doi.org/10.5194/tc-17-1247-2023, 2023
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The Greenland Ice Sheet is melting at an accelerating rate. To understand the significance of these changes we reconstruct the history of one of its fringing ice shelves, known as 79° N ice shelf. We show that the ice shelf disappeared 8500 years ago, following a period of enhanced warming. An important implication of our study is that 79° N ice shelf is susceptible to collapse when atmospheric and ocean temperatures are ~2°C warmer than present, which could occur by the middle of this century.
Bertie W. J. Miles, Chris R. Stokes, Adrian Jenkins, Jim R. Jordan, Stewart S. R. Jamieson, and G. Hilmar Gudmundsson
The Cryosphere, 17, 445–456, https://doi.org/10.5194/tc-17-445-2023, https://doi.org/10.5194/tc-17-445-2023, 2023
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Satellite observations have shown that the Shirase Glacier catchment in East Antarctica has been gaining mass over the past 2 decades, a trend largely attributed to increased snowfall. Our multi-decadal observations of Shirase Glacier show that ocean forcing has also contributed to some of this recent mass gain. This has been caused by strengthening easterly winds reducing the inflow of warm water underneath the Shirase ice tongue, causing the glacier to slow down and thicken.
Dominic A. Hodgson, Tom A. Jordan, Neil Ross, Teal R. Riley, and Peter T. Fretwell
The Cryosphere, 16, 4797–4809, https://doi.org/10.5194/tc-16-4797-2022, https://doi.org/10.5194/tc-16-4797-2022, 2022
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This paper describes the drainage (and refill) of a subglacial lake on the Antarctic Peninsula resulting in the collapse of the overlying ice into the newly formed subglacial cavity. It provides evidence of an active hydrological network under the region's glaciers and close coupling between surface climate processes and the base of the ice.
Helen Eri Amsler, Lena Mareike Thöle, Ingrid Stimac, Walter Geibert, Minoru Ikehara, Gerhard Kuhn, Oliver Esper, and Samuel Laurent Jaccard
Clim. Past, 18, 1797–1813, https://doi.org/10.5194/cp-18-1797-2022, https://doi.org/10.5194/cp-18-1797-2022, 2022
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We present sedimentary redox-sensitive trace metal records from five sediment cores retrieved from the SW Indian Ocean. These records are indicative of oxygen-depleted conditions during cold periods and enhanced oxygenation during interstadials. Our results thus suggest that deep-ocean oxygenation changes were mainly controlled by ocean ventilation and that a generally more sluggish circulation contributed to sequestering remineralized carbon away from the atmosphere during glacial periods.
Xavier Crosta, Karen E. Kohfeld, Helen C. Bostock, Matthew Chadwick, Alice Du Vivier, Oliver Esper, Johan Etourneau, Jacob Jones, Amy Leventer, Juliane Müller, Rachael H. Rhodes, Claire S. Allen, Pooja Ghadi, Nele Lamping, Carina B. Lange, Kelly-Anne Lawler, David Lund, Alice Marzocchi, Katrin J. Meissner, Laurie Menviel, Abhilash Nair, Molly Patterson, Jennifer Pike, Joseph G. Prebble, Christina Riesselman, Henrik Sadatzki, Louise C. Sime, Sunil K. Shukla, Lena Thöle, Maria-Elena Vorrath, Wenshen Xiao, and Jiao Yang
Clim. Past, 18, 1729–1756, https://doi.org/10.5194/cp-18-1729-2022, https://doi.org/10.5194/cp-18-1729-2022, 2022
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Despite its importance in the global climate, our knowledge of Antarctic sea-ice changes throughout the last glacial–interglacial cycle is extremely limited. As part of the Cycles of Sea Ice Dynamics in the Earth system (C-SIDE) Working Group, we review marine- and ice-core-based sea-ice proxies to provide insights into their applicability and limitations. By compiling published records, we provide information on Antarctic sea-ice dynamics over the past 130 000 years.
Astrid Oetting, Emma C. Smith, Jan Erik Arndt, Boris Dorschel, Reinhard Drews, Todd A. Ehlers, Christoph Gaedicke, Coen Hofstede, Johann P. Klages, Gerhard Kuhn, Astrid Lambrecht, Andreas Läufer, Christoph Mayer, Ralf Tiedemann, Frank Wilhelms, and Olaf Eisen
The Cryosphere, 16, 2051–2066, https://doi.org/10.5194/tc-16-2051-2022, https://doi.org/10.5194/tc-16-2051-2022, 2022
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This study combines a variety of geophysical measurements in front of and beneath the Ekström Ice Shelf in order to identify and interpret geomorphological evidences of past ice sheet flow, extent and retreat.
The maximal extent of grounded ice in this region was 11 km away from the continental shelf break.
The thickness of palaeo-ice on the calving front around the LGM was estimated to be at least 305 to 320 m.
We provide essential boundary conditions for palaeo-ice-sheet models.
María H. Toyos, Gisela Winckler, Helge W. Arz, Lester Lembke-Jene, Carina B. Lange, Gerhard Kuhn, and Frank Lamy
Clim. Past, 18, 147–166, https://doi.org/10.5194/cp-18-147-2022, https://doi.org/10.5194/cp-18-147-2022, 2022
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Past export production in the southeast Pacific and its link to Patagonian ice dynamics is unknown. We reconstruct biological productivity changes at the Pacific entrance to the Drake Passage, covering the past 400 000 years. We show that glacial–interglacial variability in export production responds to glaciogenic Fe supply from Patagonia and silica availability due to shifts in oceanic fronts, whereas dust, as a source of lithogenic material, plays a minor role.
Matthew Chadwick, Claire S. Allen, Louise C. Sime, Xavier Crosta, and Claus-Dieter Hillenbrand
Clim. Past, 18, 129–146, https://doi.org/10.5194/cp-18-129-2022, https://doi.org/10.5194/cp-18-129-2022, 2022
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Algae preserved in marine sediments have allowed us to reconstruct how much winter sea ice was present around Antarctica during a past time period (130 000 years ago) when the climate was warmer than today. The patterns of sea-ice increase and decrease vary between different parts of the Southern Ocean. The Pacific sector has a largely stable sea-ice extent, whereas the amount of sea ice in the Atlantic sector is much more variable with bigger decreases and increases than other regions.
Jamey Stutz, Andrew Mackintosh, Kevin Norton, Ross Whitmore, Carlo Baroni, Stewart S. R. Jamieson, Richard S. Jones, Greg Balco, Maria Cristina Salvatore, Stefano Casale, Jae Il Lee, Yeong Bae Seong, Robert McKay, Lauren J. Vargo, Daniel Lowry, Perry Spector, Marcus Christl, Susan Ivy Ochs, Luigia Di Nicola, Maria Iarossi, Finlay Stuart, and Tom Woodruff
The Cryosphere, 15, 5447–5471, https://doi.org/10.5194/tc-15-5447-2021, https://doi.org/10.5194/tc-15-5447-2021, 2021
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Understanding the long-term behaviour of ice sheets is essential to projecting future changes due to climate change. In this study, we use rocks deposited along the margin of the David Glacier, one of the largest glacier systems in the world, to reveal a rapid thinning event initiated over 7000 years ago and endured for ~ 2000 years. Using physical models, we show that subglacial topography and ocean heat are important drivers for change along this sector of the Antarctic Ice Sheet.
Rachel Diamond, Louise C. Sime, David Schroeder, and Maria-Vittoria Guarino
The Cryosphere, 15, 5099–5114, https://doi.org/10.5194/tc-15-5099-2021, https://doi.org/10.5194/tc-15-5099-2021, 2021
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The Hadley Centre Global Environment Model version 3 (HadGEM3) is the first coupled climate model to simulate an ice-free summer Arctic during the Last Interglacial (LIG), 127 000 years ago, and yields accurate Arctic surface temperatures. We investigate the causes and impacts of this extreme simulated ice loss and, in particular, the role of melt ponds.
Charlotte L. Spencer-Jones, Erin L. McClymont, Nicole J. Bale, Ellen C. Hopmans, Stefan Schouten, Juliane Müller, E. Povl Abrahamsen, Claire Allen, Torsten Bickert, Claus-Dieter Hillenbrand, Elaine Mawbey, Victoria Peck, Aleksandra Svalova, and James A. Smith
Biogeosciences, 18, 3485–3504, https://doi.org/10.5194/bg-18-3485-2021, https://doi.org/10.5194/bg-18-3485-2021, 2021
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Long-term ocean temperature records are needed to fully understand the impact of West Antarctic Ice Sheet collapse. Glycerol dialkyl glycerol tetraethers (GDGTs) are powerful tools for reconstructing ocean temperature but can be difficult to apply to the Southern Ocean. Our results show active GDGT synthesis in relatively warm depths of the ocean. This research improves the application of GDGT palaeoceanographic proxies in the Southern Ocean.
Janica C. Bühler, Carla Roesch, Moritz Kirschner, Louise Sime, Max D. Holloway, and Kira Rehfeld
Clim. Past, 17, 985–1004, https://doi.org/10.5194/cp-17-985-2021, https://doi.org/10.5194/cp-17-985-2021, 2021
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We present three new isotope-enabled simulations for the last millennium (850–1850 CE) and compare them to records from a global speleothem database. Offsets between the simulated and measured oxygen isotope ratios are fairly small. While modeled oxygen isotope ratios are more variable on decadal timescales, proxy records are more variable on (multi-)centennial timescales. This could be due to a lack of long-term variability in complex model simulations, but proxy biases cannot be excluded.
Romana Melis, Lucilla Capotondi, Fiorenza Torricella, Patrizia Ferretti, Andrea Geniram, Jong Kuk Hong, Gerhard Kuhn, Boo-Keun Khim, Sookwan Kim, Elisa Malinverno, Kyu Cheul Yoo, and Ester Colizza
J. Micropalaeontol., 40, 15–35, https://doi.org/10.5194/jm-40-15-2021, https://doi.org/10.5194/jm-40-15-2021, 2021
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Integrated micropaleontological (planktic and benthic foraminifera, diatoms, and silicoflagellates) analysis, together with textural and geochemical results of a deep-sea core from the Hallett Ridge (northwestern Ross Sea), provides new data for late Quaternary (23–2 ka) paleoenvironmental and paleoceanographic reconstructions of this region. Results allow us to identify three time intervals: the glacial–deglacial transition, the deglacial period, and the interglacial period.
Bertie W. J. Miles, Jim R. Jordan, Chris R. Stokes, Stewart S. R. Jamieson, G. Hilmar Gudmundsson, and Adrian Jenkins
The Cryosphere, 15, 663–676, https://doi.org/10.5194/tc-15-663-2021, https://doi.org/10.5194/tc-15-663-2021, 2021
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We provide a historical overview of changes in Denman Glacier's flow speed, structure and calving events since the 1960s. Based on these observations, we perform a series of numerical modelling experiments to determine the likely cause of Denman's acceleration since the 1970s. We show that grounding line retreat, ice shelf thinning and the detachment of Denman's ice tongue from a pinning point are the most likely causes of the observed acceleration.
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.
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.
Irene Malmierca-Vallet, Louise C. Sime, Paul J. Valdes, and Julia C. Tindall
Clim. Past, 16, 2485–2508, https://doi.org/10.5194/cp-16-2485-2020, https://doi.org/10.5194/cp-16-2485-2020, 2020
Maria-Elena Vorrath, Juliane Müller, Lorena Rebolledo, Paola Cárdenas, Xiaoxu Shi, Oliver Esper, Thomas Opel, Walter Geibert, Práxedes Muñoz, Christian Haas, Gerhard Kuhn, Carina B. Lange, Gerrit Lohmann, and Gesine Mollenhauer
Clim. Past, 16, 2459–2483, https://doi.org/10.5194/cp-16-2459-2020, https://doi.org/10.5194/cp-16-2459-2020, 2020
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We tested the applicability of the organic biomarker IPSO25 for sea ice reconstructions in the industrial era at the western Antarctic Peninsula. We successfully evaluated our data with satellite sea ice observations. The comparison with marine and ice core records revealed that sea ice interpretations must consider climatic and sea ice dynamics. Sea ice biomarker production is mainly influenced by the Southern Annular Mode, while the El Niño–Southern Oscillation seems to have a minor impact.
Felipe Napoleoni, Stewart S. R. Jamieson, Neil Ross, Michael J. Bentley, Andrés Rivera, Andrew M. Smith, Martin J. Siegert, Guy J. G. Paxman, Guisella Gacitúa, José A. Uribe, Rodrigo Zamora, Alex M. Brisbourne, and David G. Vaughan
The Cryosphere, 14, 4507–4524, https://doi.org/10.5194/tc-14-4507-2020, https://doi.org/10.5194/tc-14-4507-2020, 2020
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Subglacial water is important for ice sheet dynamics and stability. Despite this, there is a lack of detailed subglacial-water characterisation in West Antarctica (WA). We report 33 new subglacial lakes. Additionally, a new digital elevation model of basal topography was built and used to simulate the subglacial hydrological network in WA. The simulated subglacial hydrological catchments of Pine Island and Thwaites glaciers do not match precisely with their ice surface catchments.
Jennifer F. Arthur, Chris R. Stokes, Stewart S. R. Jamieson, J. Rachel Carr, and Amber A. Leeson
The Cryosphere, 14, 4103–4120, https://doi.org/10.5194/tc-14-4103-2020, https://doi.org/10.5194/tc-14-4103-2020, 2020
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Surface meltwater lakes can flex and fracture ice shelves, potentially leading to ice shelf break-up. A long-term record of lake evolution on Shackleton Ice Shelf is produced using optical satellite imagery and compared to surface air temperature and modelled surface melt. The results reveal that lake clustering on the ice shelf is linked to melt-enhancing feedbacks. Peaks in total lake area and volume closely correspond with intense snowmelt events rather than with warmer seasonal temperatures.
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.
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.
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.
Quentin Dalaiden, Hugues Goosse, François Klein, Jan T. M. Lenaerts, Max Holloway, Louise Sime, and Elizabeth R. Thomas
The Cryosphere, 14, 1187–1207, https://doi.org/10.5194/tc-14-1187-2020, https://doi.org/10.5194/tc-14-1187-2020, 2020
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Large uncertainties remain in Antarctic surface temperature reconstructions over the last millennium. Here, the analysis of climate model outputs reveals that snow accumulation is a more relevant proxy for surface temperature reconstructions than δ18O. We use this finding in data assimilation experiments to compare to observed surface temperatures. We show that our continental temperature reconstruction outperforms reconstructions based on δ18O, especially for East Antarctica.
Maria Luisa Sánchez-Montes, Erin L. McClymont, Jeremy M. Lloyd, Juliane Müller, Ellen A. Cowan, and Coralie Zorzi
Clim. Past, 16, 299–313, https://doi.org/10.5194/cp-16-299-2020, https://doi.org/10.5194/cp-16-299-2020, 2020
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In this paper, we present new climate reconstructions in SW Alaska from recovered marine sediments in the Gulf of Alaska. We find that glaciers reached the Gulf of Alaska during a cooling climate 2.9 million years ago, and after that the Cordilleran Ice Sheet continued growing during a global drop in atmospheric CO2 levels. Cordilleran Ice Sheet growth could have been supported by an increase in heat supply to the SW Alaska and warm ocean evaporation–mountain precipitation mechanisms.
Maria-Vittoria Guarino, Louise C. Sime, David Schroeder, Grenville M. S. Lister, and Rosalyn Hatcher
Geosci. Model Dev., 13, 139–154, https://doi.org/10.5194/gmd-13-139-2020, https://doi.org/10.5194/gmd-13-139-2020, 2020
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When the same weather or climate simulation is run on different high-performance computing (HPC) platforms, model outputs may not be identical for a given initial condition. Here, we investigate the behaviour of the Preindustrial simulation prepared by the UK Met Office for the forthcoming CMIP6 under different computing environments. Discrepancies between the means of key climate variables were analysed at different timescales, from decadal to centennial.
Agathe Lisé-Pronovost, Michael-Shawn Fletcher, Tom Mallett, Michela Mariani, Richard Lewis, Patricia S. Gadd, Andy I. R. Herries, Maarten Blaauw, Hendrik Heijnis, Dominic A. Hodgson, and Joel B. Pedro
Sci. Dril., 25, 1–14, https://doi.org/10.5194/sd-25-1-2019, https://doi.org/10.5194/sd-25-1-2019, 2019
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We present the first results from scientific drilling at Darwin Crater, a 816 000-year-old meteorite impact crater in Tasmania. The aim was to recover lacustrine sediments in the crater to reconstruct paleoclimate and bridge a time gap in understanding climate change in mid-latitude Australia. The multi-proxy dataset provides clear signatures of alternating glacial and interglacial lithologies, promising for investigating the role of the Southern Hemisphere westerly winds in Pleistocene climate.
Robert D. Larter, Kelly A. Hogan, Claus-Dieter Hillenbrand, James A. Smith, Christine L. Batchelor, Matthieu Cartigny, Alex J. Tate, James D. Kirkham, Zoë A. Roseby, Gerhard Kuhn, Alastair G. C. Graham, and Julian A. Dowdeswell
The Cryosphere, 13, 1583–1596, https://doi.org/10.5194/tc-13-1583-2019, https://doi.org/10.5194/tc-13-1583-2019, 2019
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We present high-resolution bathymetry data that provide the most complete and detailed imagery of any Antarctic palaeo-ice stream bed. These data show how subglacial water was delivered to and influenced the dynamic behaviour of the ice stream. Our observations provide insights relevant to understanding the behaviour of modern ice streams and forecasting the contributions that they will make to future sea level rise.
Dominic A. Hodgson, Tom A. Jordan, Jan De Rydt, Peter T. Fretwell, Samuel A. Seddon, David Becker, Kelly A. Hogan, Andrew M. Smith, and David G. Vaughan
The Cryosphere, 13, 545–556, https://doi.org/10.5194/tc-13-545-2019, https://doi.org/10.5194/tc-13-545-2019, 2019
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The Brunt Ice Shelf in Antarctica is home to Halley VIa, the latest in a series of six British research stations that have occupied the ice shelf since 1956. A recent rapid growth of rifts in the Brunt Ice Shelf signals the onset of its largest calving event since records began. Here we consider whether this calving event will lead to a new steady state for the ice shelf or an unpinning from the bed, which could predispose it to accelerated flow or collapse.
Bertie W. J. Miles, Chris R. Stokes, and Stewart S. R. Jamieson
The Cryosphere, 12, 3123–3136, https://doi.org/10.5194/tc-12-3123-2018, https://doi.org/10.5194/tc-12-3123-2018, 2018
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Cook Glacier, as one of the largest in East Antarctica, may have made significant contributions to sea level during past warm periods. However, despite its potential importance there have been no long-term observations of its velocity. Here, through estimating velocity and ice front position from satellite imagery and aerial photography we show that there have been large previously undocumented changes in the velocity of Cook Glacier in response to ice shelf loss and a subglacial drainage event.
Dominic A. Hodgson, Kelly Hogan, James M. Smith, James A. Smith, Claus-Dieter Hillenbrand, Alastair G. C. Graham, Peter Fretwell, Claire Allen, Vicky Peck, Jan-Erik Arndt, Boris Dorschel, Christian Hübscher, Andrew M. Smith, and Robert Larter
The Cryosphere, 12, 2383–2399, https://doi.org/10.5194/tc-12-2383-2018, https://doi.org/10.5194/tc-12-2383-2018, 2018
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We studied the Coats Land ice margin, Antarctica, providing a multi-disciplinary geophysical assessment of the ice sheet configuration through its last advance and retreat; a description of the physical constraints on the stability of the past and present ice and future margin based on its submarine geomorphology and ice-sheet geometry; and evidence that once detached from the bed, the ice shelves in this region were predisposed to rapid retreat back to coastal grounding lines.
Paul E. Bachem, Bjørg Risebrobakken, Stijn De Schepper, and Erin L. McClymont
Clim. Past, 13, 1153–1168, https://doi.org/10.5194/cp-13-1153-2017, https://doi.org/10.5194/cp-13-1153-2017, 2017
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We present a high-resolution multi-proxy study of the Norwegian Sea, covering the 5.33 to 3.14 Ma time window within the Pliocene. We show that large-scale climate transitions took place during this warmer than modern time, most likely in response to ocean gateway transformations. Strong warming at 4.0 Ma in the Norwegian Sea, when regions closer to Greenland cooled, indicate that increased northward ocean heat transport may be compatible with expanding glaciation and Arctic sea ice growth.
Amelie Driemel, Eberhard Fahrbach, Gerd Rohardt, Agnieszka Beszczynska-Möller, Antje Boetius, Gereon Budéus, Boris Cisewski, Ralph Engbrodt, Steffen Gauger, Walter Geibert, Patrizia Geprägs, Dieter Gerdes, Rainer Gersonde, Arnold L. Gordon, Hannes Grobe, Hartmut H. Hellmer, Enrique Isla, Stanley S. Jacobs, Markus Janout, Wilfried Jokat, Michael Klages, Gerhard Kuhn, Jens Meincke, Sven Ober, Svein Østerhus, Ray G. Peterson, Benjamin Rabe, Bert Rudels, Ursula Schauer, Michael Schröder, Stefanie Schumacher, Rainer Sieger, Jüri Sildam, Thomas Soltwedel, Elena Stangeew, Manfred Stein, Volker H Strass, Jörn Thiede, Sandra Tippenhauer, Cornelis Veth, Wilken-Jon von Appen, Marie-France Weirig, Andreas Wisotzki, Dieter A. Wolf-Gladrow, and Torsten Kanzow
Earth Syst. Sci. Data, 9, 211–220, https://doi.org/10.5194/essd-9-211-2017, https://doi.org/10.5194/essd-9-211-2017, 2017
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Our oceans are always in motion – huge water masses are circulated by winds and by global seawater density gradients resulting from different water temperatures and salinities. Measuring temperature and salinity of the world's oceans is crucial e.g. to understand our climate. Since 1983, the research icebreaker Polarstern has been the basis of numerous water profile measurements in the Arctic and the Antarctic. We report on a unique collection of 33 years of polar salinity and temperature data.
Bertie W. J. Miles, Chris R. Stokes, and Stewart S. R. Jamieson
The Cryosphere, 11, 427–442, https://doi.org/10.5194/tc-11-427-2017, https://doi.org/10.5194/tc-11-427-2017, 2017
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We observe a large simultaneous calving event in Porpoise Bay, East Antarctica, where ~ 2900 km2 of ice was removed from floating glacier tongues between January and April 2007. This event was caused by the break-up of the multi-year sea ice usually occupies the bay, which we link to climatic forcing. We also observe a similar large calving event in March 2016 (~ 2200 km2), which we link to the long-term calving cycle of Holmes (West) Glacier.
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.
Carlos Rocha, Cristina Veiga-Pires, Jan Scholten, Kay Knoeller, Darren R. Gröcke, Liliana Carvalho, Jaime Anibal, and Jean Wilson
Hydrol. Earth Syst. Sci., 20, 3077–3098, https://doi.org/10.5194/hess-20-3077-2016, https://doi.org/10.5194/hess-20-3077-2016, 2016
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We combine radon and stable isotopes in water to determine total submarine groundwater discharge (SGD) in the Ria Formosa and discriminate its component modes. We show that tidal action filters the entire water volume in the lagoon through local beaches 3.5 times a year, driving an estimated 350Ton nitrogen/year into the system. Conversely, fresh groundwater is discharged into the lagoon only occasionally, adding ~ 61 Ton nitrogen/year, but is capable of driving new production in the system.
Niels A. G. M. van Helmond, Appy Sluijs, Nina M. Papadomanolaki, A. Guy Plint, Darren R. Gröcke, Martin A. Pearce, James S. Eldrett, João Trabucho-Alexandre, Ireneusz Walaszczyk, Bas van de Schootbrugge, and Henk Brinkhuis
Biogeosciences, 13, 2859–2872, https://doi.org/10.5194/bg-13-2859-2016, https://doi.org/10.5194/bg-13-2859-2016, 2016
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Over the past decades large changes have been observed in the biogeographical dispersion of marine life resulting from climate change. To better understand present and future trends it is important to document and fully understand the biogeographical response of marine life during episodes of environmental change in the geological past.
Here we investigate the response of phytoplankton, the base of the marine food web, to a rapid cold spell, interrupting greenhouse conditions during the Cretaceous.
Liv Heinecke, Steffen Mischke, Karsten Adler, Anja Barth, Boris K. Biskaborn, Birgit Plessen, Ingmar Nitze, Gerhard Kuhn, Ilhomjon Rajabov, and Ulrike Herzschuh
Clim. Past Discuss., https://doi.org/10.5194/cp-2016-34, https://doi.org/10.5194/cp-2016-34, 2016
Revised manuscript not accepted
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The climate history of the Pamir Mountains (Tajikistan) during the last ~29 kyr was investigated using sediments from Lake Karakul as environmental archive. The inferred lake level was highest from the Late Glacial to the early Holocene and lake changes were mainly coupled to climate change. We conclude that the joint influence of Westerlies and Indian Monsoon during the early Holocene caused comparatively moist conditions, while dominating Westerlies yielded dry conditions since 6.7 cal kyr BP.
H. Kuehn, L. Lembke-Jene, R. Gersonde, O. Esper, F. Lamy, H. Arz, G. Kuhn, and R. Tiedemann
Clim. Past, 10, 2215–2236, https://doi.org/10.5194/cp-10-2215-2014, https://doi.org/10.5194/cp-10-2215-2014, 2014
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Annually laminated sediments from the NE Bering Sea reveal a decadal-scale correlation to Greenland ice core records during termination I, suggesting an atmospheric teleconnection. Lamination occurrence is tightly coupled to Bølling-Allerød and Preboreal warm phases. Increases in export production, closely coupled to SST and sea ice changes, are hypothesized to be a main cause of deglacial anoxia, rather than changes in overturning/ventilation rates of mid-depth waters entering the Bering Sea.
D. Sprenk, M. E. Weber, G. Kuhn, V. Wennrich, T. Hartmann, and K. Seelos
Clim. Past, 10, 1239–1251, https://doi.org/10.5194/cp-10-1239-2014, https://doi.org/10.5194/cp-10-1239-2014, 2014
F. O. Nitsche, K. Gohl, R. D. Larter, C.-D. Hillenbrand, G. Kuhn, J. A. Smith, S. Jacobs, J. B. Anderson, and M. Jakobsson
The Cryosphere, 7, 249–262, https://doi.org/10.5194/tc-7-249-2013, https://doi.org/10.5194/tc-7-249-2013, 2013
Related subject area
Subject: Ocean Dynamics | Archive: Marine Archives | Timescale: Pleistocene
Planktonic foraminiferal assemblages as tracers of paleoceanographic changes within the northern Benguela current system since the Early Pleistocene
Glacial–interglacial Circumpolar Deep Water temperatures during the last 800 000 years: estimates from a synthesis of bottom water temperature reconstructions
Sea-level and monsoonal control on the Maldives carbonate platform (Indian Ocean) over the last 1.3 million years
Changes in the Red Sea overturning circulation during Marine Isotope Stage 3
Bottom water oxygenation changes in the southwestern Indian Ocean as an indicator for enhanced respired carbon storage since the last glacial inception
An Intertropical Convergence Zone shift controlled the terrestrial material supply on the Ninetyeast Ridge
Sea ice changes in the southwest Pacific sector of the Southern Ocean during the last 140 000 years
Variations in export production, lithogenic sediment transport and iron fertilization in the Pacific sector of the Drake Passage over the past 400 kyr
Lower oceanic δ13C during the last interglacial period compared to the Holocene
Change in the North Atlantic circulation associated with the mid-Pleistocene transition
Thermocline state change in the eastern equatorial Pacific during the late Pliocene/early Pleistocene intensification of Northern Hemisphere glaciation
A multi-proxy analysis of Late Quaternary ocean and climate variability for the Maldives, Inner Sea
Central Arctic Ocean paleoceanography from ∼ 50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition
Deglacial sea level history of the East Siberian Sea and Chukchi Sea margins
Mediterranean Outflow Water variability during the Early Pleistocene
Last Glacial Maximum and deglacial abyssal seawater oxygen isotopic ratios
Subsurface North Atlantic warming as a trigger of rapid cooling events: evidence from the early Pleistocene (MIS 31–19)
Photic zone changes in the north-west Pacific Ocean from MIS 4–5e
Seasonal changes in glacial polynya activity inferred from Weddell Sea varves
High-latitude obliquity as a dominant forcing in the Agulhas current system
Sensitivity of Red Sea circulation to sea level and insolation forcing during the last interglacial
Sea-surface salinity variations in the northern Caribbean Sea across the Mid-Pleistocene Transition
Oceanic tracer and proxy time scales revisited
Variations in mid-latitude North Atlantic surface water properties during the mid-Brunhes (MIS 9–14) and their implications for the thermohaline circulation
A simple mixing explanation for late Pleistocene changes in the Pacific-South Atlantic benthic δ13C gradient
High Arabian Sea productivity conditions during MIS 13 – odd monsoon event or intensified overturning circulation at the end of the Mid-Pleistocene transition?
Arianna V. Del Gaudio, Aaron Avery, Gerald Auer, Werner E. Piller, and Walter Kurz
Clim. Past, 20, 2237–2266, https://doi.org/10.5194/cp-20-2237-2024, https://doi.org/10.5194/cp-20-2237-2024, 2024
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The Benguela Upwelling System is a region in the SE Atlantic Ocean of high biological productivity. It comprises several water masses such as the Benguela Current, South Atlantic Central Water, and Indian Ocean Agulhas waters. We analyzed planktonic foraminifera from IODP Sites U1575 and U1576 to characterize water masses and their interplay in the Pleistocene. This defined changes in the local thermocline, which were linked to long-term Benguela Niño- and Niña-like and deglaciation events.
David M. Chandler and Petra M. Langebroek
Clim. Past, 20, 2055–2080, https://doi.org/10.5194/cp-20-2055-2024, https://doi.org/10.5194/cp-20-2055-2024, 2024
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Sea level rise and global climate change caused by ice melt in Antarctica represent a puzzle of feedbacks between the climate, ocean, and ice sheets over tens to thousands of years. Antarctic Ice Sheet melting is caused mainly by warm deep water from the Southern Ocean. Here, we analyse close relationships between deep water temperatures and global climate over the last 800 000 years. This knowledge can help us to better understand how climate and sea level are likely to change in the future.
Montserrat Alonso-Garcia, Jesus Reolid, Francisco J. Jimenez-Espejo, Or M. Bialik, Carlos A. Alvarez Zarikian, Juan Carlos Laya, Igor Carrasquiera, Luigi Jovane, John J. G. Reijmer, Gregor P. Eberli, and Christian Betzler
Clim. Past, 20, 547–571, https://doi.org/10.5194/cp-20-547-2024, https://doi.org/10.5194/cp-20-547-2024, 2024
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The Maldives Inner Sea (northern Indian Ocean) offers an excellent study site to explore the impact of climate and sea-level changes on carbonate platforms. The sediments from International Ocean Discovery Program (IODP) Site U1467 have been studied to determine the drivers of carbonate production in the atolls over the last 1.3 million years. Even though sea level is important, the intensity of the summer monsoon and the Indian Ocean dipole probably modulated the production at the atolls.
Raphaël Hubert-Huard, Nils Andersen, Helge W. Arz, Werner Ehrmann, and Gerhard Schmiedl
Clim. Past, 20, 267–280, https://doi.org/10.5194/cp-20-267-2024, https://doi.org/10.5194/cp-20-267-2024, 2024
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We have studied the geochemistry of benthic foraminifera (micro-fossils) from a sediment core from the Red Sea. Our data show that the circulation and carbon cycling of the Red Sea during the last glacial period responded to high-latitude millennial-scale climate variability and to the orbital influence of the African–Indian monsoon system. This implies a sensitive response of the Red Sea to climate changes.
Helen Eri Amsler, Lena Mareike Thöle, Ingrid Stimac, Walter Geibert, Minoru Ikehara, Gerhard Kuhn, Oliver Esper, and Samuel Laurent Jaccard
Clim. Past, 18, 1797–1813, https://doi.org/10.5194/cp-18-1797-2022, https://doi.org/10.5194/cp-18-1797-2022, 2022
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We present sedimentary redox-sensitive trace metal records from five sediment cores retrieved from the SW Indian Ocean. These records are indicative of oxygen-depleted conditions during cold periods and enhanced oxygenation during interstadials. Our results thus suggest that deep-ocean oxygenation changes were mainly controlled by ocean ventilation and that a generally more sluggish circulation contributed to sequestering remineralized carbon away from the atmosphere during glacial periods.
Xudong Xu, Jianguo Liu, Yun Huang, Lanlan Zhang, Liang Yi, Shengfa Liu, Yiping Yang, Li Cao, and Long Tan
Clim. Past, 18, 1369–1384, https://doi.org/10.5194/cp-18-1369-2022, https://doi.org/10.5194/cp-18-1369-2022, 2022
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Terrestrial materials in marine environments record source information and help us understand how climate and ocean impact sediment compositions. Here, we use evidence on the Ninetyeast Ridge to analyze the relationship between terrestrial material supplementation and climatic change. We find that the ITCZ controlled the rainfall in the Burman source area and that closer connections occurred between the Northern–Southern Hemisphere in the eastern Indian Ocean during the late LGM.
Jacob Jones, Karen E. Kohfeld, Helen Bostock, Xavier Crosta, Melanie Liston, Gavin Dunbar, Zanna Chase, Amy Leventer, Harris Anderson, and Geraldine Jacobsen
Clim. Past, 18, 465–483, https://doi.org/10.5194/cp-18-465-2022, https://doi.org/10.5194/cp-18-465-2022, 2022
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We provide new winter sea ice and summer sea surface temperature estimates for marine core TAN1302-96 (59° S, 157° E) in the Southern Ocean. We find that sea ice was not consolidated over the core site until ~65 ka and therefore believe that sea ice may not have been a major contributor to early glacial CO2 drawdown. Sea ice does appear to have coincided with Antarctic Intermediate Water production and subduction, suggesting it may have influenced intermediate ocean circulation changes.
María H. Toyos, Gisela Winckler, Helge W. Arz, Lester Lembke-Jene, Carina B. Lange, Gerhard Kuhn, and Frank Lamy
Clim. Past, 18, 147–166, https://doi.org/10.5194/cp-18-147-2022, https://doi.org/10.5194/cp-18-147-2022, 2022
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Past export production in the southeast Pacific and its link to Patagonian ice dynamics is unknown. We reconstruct biological productivity changes at the Pacific entrance to the Drake Passage, covering the past 400 000 years. We show that glacial–interglacial variability in export production responds to glaciogenic Fe supply from Patagonia and silica availability due to shifts in oceanic fronts, whereas dust, as a source of lithogenic material, plays a minor role.
Shannon A. Bengtson, Laurie C. Menviel, Katrin J. Meissner, Lise Missiaen, Carlye D. Peterson, Lorraine E. Lisiecki, and Fortunat Joos
Clim. Past, 17, 507–528, https://doi.org/10.5194/cp-17-507-2021, https://doi.org/10.5194/cp-17-507-2021, 2021
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The last interglacial was a warm period that may provide insights into future climates. Here, we compile and analyse stable carbon isotope data from the ocean during the last interglacial and compare it to the Holocene. The data show that Atlantic Ocean circulation was similar during the last interglacial and the Holocene. We also establish a difference in the mean oceanic carbon isotopic ratio between these periods, which was most likely caused by burial and weathering carbon fluxes.
Gloria M. Martin-Garcia, Francisco J. Sierro, José A. Flores, and Fátima Abrantes
Clim. Past, 14, 1639–1651, https://doi.org/10.5194/cp-14-1639-2018, https://doi.org/10.5194/cp-14-1639-2018, 2018
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This work documents major oceanographic changes that occurred in the N. Atlantic from 812 to 530 ka and were related to the mid-Pleistocene transition. Since ~ 650 ka, glacials were more prolonged and intense than before. Larger ice sheets may have worked as a positive feedback mechanism to prolong the duration of glacials. We explore the connection between the change in the N. Atlantic oceanography and the enhanced ice-sheet growth, which contributed to the change of cyclicity in climate.
Kim Alix Jakob, Jörg Pross, Christian Scholz, Jens Fiebig, and Oliver Friedrich
Clim. Past, 14, 1079–1095, https://doi.org/10.5194/cp-14-1079-2018, https://doi.org/10.5194/cp-14-1079-2018, 2018
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Eastern equatorial Pacific (EEP) thermocline dynamics during the intensification of Northern Hemisphere glaciation (iNHG; ~ 2.5 Ma) currently remain unclear. In light of this uncertainty, we generated geochemical, faunal and sedimentological data for EEP Site 849 (~ 2.75–2.4 Ma). We recorded a thermocline depth change shortly before the final phase of the iNHG, which supports the hypothesis that tropical thermocline shoaling may have contributed to substantial Northern Hemisphere ice growth.
Dorothea Bunzel, Gerhard Schmiedl, Sebastian Lindhorst, Andreas Mackensen, Jesús Reolid, Sarah Romahn, and Christian Betzler
Clim. Past, 13, 1791–1813, https://doi.org/10.5194/cp-13-1791-2017, https://doi.org/10.5194/cp-13-1791-2017, 2017
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We investigated a sediment core from the Maldives to unravel the interaction between equatorial climate and ocean variability of the past 200 000 years. The sedimentological, geochemical and foraminiferal data records reveal enhanced dust, which was transported by intensified winter monsoon winds during glacial conditions. Precessional fluctuations of bottom water oxygen suggests an expansion of the Arabian Sea OMZ and a varying inflow of Antarctic Intermediate Water.
Laura Gemery, Thomas M. Cronin, Robert K. Poirier, Christof Pearce, Natalia Barrientos, Matt O'Regan, Carina Johansson, Andrey Koshurnikov, and Martin Jakobsson
Clim. Past, 13, 1473–1489, https://doi.org/10.5194/cp-13-1473-2017, https://doi.org/10.5194/cp-13-1473-2017, 2017
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Continuous, highly abundant and well-preserved fossil ostracodes were studied from radiocarbon-dated sediment cores collected on the Lomonosov Ridge (Arctic Ocean) that indicate varying oceanographic conditions during the last ~50 kyr. Ostracode assemblages from cores taken during the SWERUS-C3 2014 Expedition, Leg 2, reflect paleoenvironmental changes during glacial, deglacial, and interglacial transitions, including changes in sea-ice cover and Atlantic Water inflow into the Eurasian Basin.
Thomas M. Cronin, Matt O'Regan, Christof Pearce, Laura Gemery, Michael Toomey, Igor Semiletov, and Martin Jakobsson
Clim. Past, 13, 1097–1110, https://doi.org/10.5194/cp-13-1097-2017, https://doi.org/10.5194/cp-13-1097-2017, 2017
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Global sea level rise during the last deglacial flooded the Siberian continental shelf in the Arctic Ocean. Sediment cores, radiocarbon dating, and microfossils show that the regional sea level in the Arctic rose rapidly from about 12 500 to 10 700 years ago. Regional sea level history on the Siberian shelf differs from the global deglacial sea level rise perhaps due to regional vertical adjustment resulting from the growth and decay of ice sheets.
Stefanie Kaboth, Patrick Grunert, and Lucas Lourens
Clim. Past, 13, 1023–1035, https://doi.org/10.5194/cp-13-1023-2017, https://doi.org/10.5194/cp-13-1023-2017, 2017
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This study is devoted to reconstructing Mediterranean Outflow Water (MOW) variability and the interplay between the Mediterranean and North Atlantic climate systems during the Early Pleistocene. We find indication that the increasing production of MOW aligns with the intensification of the North Atlantic overturning circulation, highlighting the potential of MOW to modulate the North Atlantic salt budget. Our results are based on new stable isotope and grain-size data from IODP 339 Site U1389.
Carl Wunsch
Clim. Past, 12, 1281–1296, https://doi.org/10.5194/cp-12-1281-2016, https://doi.org/10.5194/cp-12-1281-2016, 2016
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This paper examines the oxygen isotope data in several deep-sea cores. The question addressed is whether those data support an inference that the abyssal ocean in the Last Glacial Maximum period was significantly colder than it is today. Along with a separate analysis of salinity data in the same cores, it is concluded that a cold, saline deep ocean is consistent with the available data but so is an abyss much more like that found today. LGM model testers should beware.
I. Hernández-Almeida, F.-J. Sierro, I. Cacho, and J.-A. Flores
Clim. Past, 11, 687–696, https://doi.org/10.5194/cp-11-687-2015, https://doi.org/10.5194/cp-11-687-2015, 2015
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This manuscript presents new Mg/Ca and previously published δ18O measurements of Neogloboquadrina pachyderma sinistral for MIS 31-19, from a sediment core from the subpolar North Atlantic. The mechanism proposed here involves northward subsurface transport of warm and salty subtropical waters during periods of weaker AMOC, leading to ice-sheet instability and IRD discharge. This is the first time that these rapid climate oscillations are described for the early Pleistocene.
G. E. A. Swann and A. M. Snelling
Clim. Past, 11, 15–25, https://doi.org/10.5194/cp-11-15-2015, https://doi.org/10.5194/cp-11-15-2015, 2015
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New diatom isotope records are presented alongside existing geochemical and isotope records to document changes in the photic zone, including nutrient supply and the efficiency of the soft-tissue biological pump, between MIS 4 and MIS 5e in the subarctic north-west Pacific Ocean. The results provide evidence for temporal changes in the strength and efficiency of the regional soft-tissue biological pump, altering the ratio of regenerated to preformed nutrients in the water.
D. Sprenk, M. E. Weber, G. Kuhn, V. Wennrich, T. Hartmann, and K. Seelos
Clim. Past, 10, 1239–1251, https://doi.org/10.5194/cp-10-1239-2014, https://doi.org/10.5194/cp-10-1239-2014, 2014
T. Caley, J.-H. Kim, B. Malaizé, J. Giraudeau, T. Laepple, N. Caillon, K. Charlier, H. Rebaubier, L. Rossignol, I. S. Castañeda, S. Schouten, and J. S. Sinninghe Damsté
Clim. Past, 7, 1285–1296, https://doi.org/10.5194/cp-7-1285-2011, https://doi.org/10.5194/cp-7-1285-2011, 2011
G. Trommer, M. Siccha, E. J. Rohling, K. Grant, M. T. J. van der Meer, S. Schouten, U. Baranowski, and M. Kucera
Clim. Past, 7, 941–955, https://doi.org/10.5194/cp-7-941-2011, https://doi.org/10.5194/cp-7-941-2011, 2011
S. Sepulcre, L. Vidal, K. Tachikawa, F. Rostek, and E. Bard
Clim. Past, 7, 75–90, https://doi.org/10.5194/cp-7-75-2011, https://doi.org/10.5194/cp-7-75-2011, 2011
C. Siberlin and C. Wunsch
Clim. Past, 7, 27–39, https://doi.org/10.5194/cp-7-27-2011, https://doi.org/10.5194/cp-7-27-2011, 2011
A. H. L. Voelker, T. Rodrigues, K. Billups, D. Oppo, J. McManus, R. Stein, J. Hefter, and J. O. Grimalt
Clim. Past, 6, 531–552, https://doi.org/10.5194/cp-6-531-2010, https://doi.org/10.5194/cp-6-531-2010, 2010
L. E. Lisiecki
Clim. Past, 6, 305–314, https://doi.org/10.5194/cp-6-305-2010, https://doi.org/10.5194/cp-6-305-2010, 2010
M. Ziegler, L. J. Lourens, E. Tuenter, and G.-J. Reichart
Clim. Past, 6, 63–76, https://doi.org/10.5194/cp-6-63-2010, https://doi.org/10.5194/cp-6-63-2010, 2010
Cited articles
Ackley, S. F., Xie, H., and Tichenor, E. A.: Ocean heat flux under Antarctic sea ice in the Bellingshausen and Amundsen Seas: two case studies, Ann. Glaciol., 56, 200–210, 2015.
Adkins, J. F.: The role of deep ocean circulation in setting glacial
climates, Paleoceanography, 28, 539–561, https://doi.org/10.1002/palo.20046, 2013.
Adkins, J. F., McIntyre, K., and Schrag, D. P.: The Salinity, Temperature,
and δ18O of the Glacial Deep Ocean, Science, 298, 1769–1773,
2002.
Aiello, A., Fattorusso, E., Menna, M., Vitalone, R., Schröder, H. C.,
and Müller, W. E. G.: Mumijo traditional medicine: fossil deposits from
antarctica (chemical composition and beneficial bioactivity), Evid.-Based Compl. Alt., 2011, 738131–738131, https://doi.org/10.1093/ecam/nen072, 2011.
Ainley, D. G., O'Connor, E. F., and Boekelheide, R. J.: The marine ecology
of birds in the Ross Sea, Antarctica, in: American Ornithologist's Union
Ornithological Monograph, 97, 1–97, https://doi.org/10.2307/40166773, 1984.
Ainley, D. G., Ribic, C. A., and Fraser, W. R.: Does prey preference affect
habitat choice in Antarctic seabirds?, Mar. Ecol. Prog. Ser., 90, 207–221,
1992.
Ainley, D. G., Hobson, K. A., Crosta, X., Rau, G. H., Wassenaar, L. I., and
Augustinus, P. C.: Holocene variation in the Antarctic coastal food web:
linking δD and δ13C in snow petrel diet and marine
sediments, Mar. Ecol. Prog. Ser., 306, 31–40, 2006.
Allen, C. S., Pike, J., and Pudsey, C. J.: Last glacial-interglacial sea-ice
cover in the SW Atlantic and its potential role in global deglaciation,
Quaternary Sci. Rev., 30, 2446–2458, 2011.
Arrigo, K. R. and van Dijken, G. L.: Phytoplankton dynamics within 37
Antarctic coastal polynya systems, J. Geophys. Res.-Oceans,
108, 3271, https://doi.org/10.1029/2002JC001739, 2003.
Arrigo, K. R., van Dijken, G., and Long, M.: Coastal Southern Ocean: A
strong anthropogenic CO2 sink, Geophys. Res. Lett., 35,
L21602, https://doi.org/10.1029/2008GL035624, 2008.
Atkinson, A., Siegel, V., Pakhomov, E., and Rothery, P.: Long-term decline
in krill stock and increase in salps within the Southern Ocean, Nature, 432,
100–103, https://doi.org/10.1038/nature02996, 2004.
Atkinson, A., Siegel, V., Pakhomov, E. A., Rothery, P., Loeb, V., Ross, R.
M., Quetin, L. B., Schmidt, K., Fretwell, P., Murphy, E. J., Tarling, G. A.,
and Fleming, A. H.: Oceanic circumpolar habitats of Antarctic krill, Mar. Ecol. Prog. Ser., 362, 1–23, 2008.
Barbraud, C., Weimerskirch, H., Robertson, G. G., and Jouventin, P.:
Size-related life history traits: insights from a study of snow petrels
(Pagodroma nivea), J. Anim. Ecol., 68, 1179–1192, https://doi.org/10.1046/j.1365-2656.1999.00361.x, 1999.
Bauska, T. K., Marcott, S. A., and Brook, E. J.: Abrupt changes in the global carbon cycle during the last glacial period, Nat. Geosci., 14, 91–96, https://doi.org/10.1038/s41561-020-00680-2, 2021.
Bennett, K.: Determination of the number of zones in a biostratigraphic
sequence, New Phytol., 132, 155–170, 1996.
Bentley, M. J., Ó Cofaigh, C., Anderson, J. B., Conway, H., Davies, B.,
Graham, A. G. C., Hillenbrand, C.-D., Hodgson, D. A., Jamieson, S. S. R.,
Larter, R. D., Mackintosh, A., Smith, J. A., Verleyen, E., Ackert, R. P.,
Bart, P. J., Berg, S., Brunstein, D., Canals, M., Colhoun, E. A., Crosta,
X., Dickens, W. A., Domack, E., Dowdeswell, J. A., Dunbar, R., Ehrmann, W.,
Evans, J., Favier, V., Fink, D., Fogwill, C. J., Glasser, N. F., Gohl, K.,
Golledge, N. R., Goodwin, I., Gore, D. B., Greenwood, S. L., Hall, B. L.,
Hall, K., Hedding, D. W., Hein, A. S., Hocking, E. P., Jakobsson, M.,
Johnson, J. S., Jomelli, V., Jones, R. S., Klages, J. P., Kristoffersen, Y.,
Kuhn, G., Leventer, A., Licht, K., Lilly, K., Lindow, J., Livingstone, S.
J., Massé, G., McGlone, M. S., McKay, R. M., Melles, M., Miura, H.,
Mulvaney, R., Nel, W., Nitsche, F. O., O'Brien, P. E., Post, A. L., Roberts,
S. J., Saunders, K. M., Selkirk, P. M., Simms, A. R., Spiegel, C.,
Stolldorf, T. D., Sugden, D. E., van der Putten, N., van Ommen, T.,
Verfaillie, D., Vyverman, W., Wagner, B., White, D. A., Witus, A. E., and
Zwartz, D.: A community-based geological reconstruction of Antarctic Ice
Sheet deglaciation since the Last Glacial Maximum, Quaternary Sci. Rev., 100, 1–9, https://doi.org/10.1016/j.quascirev.2014.06.025, 2014.
Benz, V., Esper, O., Gersonde, R., Lamy, F., and Tiedemann, R.: Last Glacial
Maximum sea surface temperature and sea-ice extent in the Pacific sector of
the Southern Ocean, Quaternary Sci. Rev., 146, 216–237, https://doi.org/10.1016/j.quascirev.2016.06.006, 2016.
Berg, S., Melles, M., Hermichen, W.-D., McClymont, E. L., Bentley, M. J.,
Hodgson, D. A., and Kuhn, G.: Evaluation of Mumiyo Deposits From East
Antarctica as Archives for the Late Quaternary Environmental and Climatic
History, Geochemistry, Geophysics, Geosystems, 20, 260–276,
https://doi.org/10.1029/2018GC008054, 2019.
Bierman, W. H. and Voous, K. H.: Birds observed and collected during the
whaling expedition of the “Willem Barendz” in the Antarctic 1946–1947,
Ardea, 37, 1–123, 1950.
Björck, S., Hjort, C., Ingólfsson, O., and Skog, G.: Radiocarbon
dates from the Antarctic Peninsula – problems and potential, in:
Radiocarbon Dating: Recent Applications and Future Potential, edited by:
Lowe, J. J., Quaternary Research Association, Cambridge, 55–65, ISSN 0963-1895, 1991.
Bonn, W. J., Gingele, F. X., Grobe, H., Mackensen, A., and Fütterer, D.
K.: Palaeoproductivity at the Antarctic continental margin: opal and barium
records for the last 400 ka, Palaeogeogr. Palaeocl., 139, 195–211, 1998.
Bostock, H. C., Opdyke, B. N., Gagan, M. K., and Fifield, L. K.: Carbon
isotope evidence for changes in Antarctic Intermediate Water circulation and
ocean ventilation in the southwest Pacific during the last deglaciation,
Paleoceanography, 19, PA001047, https://doi.org/10.1029/2004PA001047, 2004.
Bottino, N. R.: Lipid composition of two species of antarctic krill:
Euphausia superba and E. crystallorophias, Comp. Biochem. Phys. B, 50, 479–484, https://doi.org/10.1016/0305-0491(75)90261-8,
1975.
Bouttes, N., Roche, D. M., Paillard, D., Brovkin, V., and Bopp, L.: Last Glacial Maximum CO2 and δ13C successfully reconciled, Geophys. Res. Lett., 38, L02705, https://doi.org/10.1029/2010GL044499, 2011.
Bridges, C., Savel, A., Stöcker, W., J., M., and Linzen, B.: Structure
and function of krill (Euphausia superba) haemocyanin – adaptation to life at low temperature, Life Chem. Rep. Suppl., 1, 353–356, 1983.
Cherel, Y., Fontaine, C., Richard, P., and Labatc, J.-P.: Isotopic niches
and trophic levels of myctophid fishes and their predators in the Southern
Ocean, Limnol. Oceanogr., 55, 324–332, https://doi.org/10.4319/lo.2010.55.1.0324, 2010.
Cherel, Y., Koubbi, P., Giraldo, C., Penot, F., Tavernier, E., Moteki, M.,
Ozouf-Costaz, C., Causse, R., Chartier, A., and Hosie, G.: Isotopic niches
of fishes in coastal, neritic and oceanic waters off Adélie land,
Antarctica, Polar Sci., 5, 286–297, https://doi.org/10.1016/j.polar.2010.12.004, 2011.
Collins, L. G., Pike, J., Allen, C. S., and Hodgson, D. A.: High-resolution
reconstruction of southwest Atlantic sea-ice and its role in the carbon
cycle during marine isotope stages 3 and 2, Paleoceanography, 27, PA3217, https://doi.org/10.1029/2011pa002264, 2012.
Collins, M., Knutti, R., Arblaster, J., Dufresne, J.-L., Fichefet, T.,
Friedlingstein, P., Gao, X., Gutowski, W. J., Johns, T., Krinner, G.,
Shongwe, M., Tebaldi, C., Weaver, A. J., and Wehner, M.: Long-term Climate
Change: Projections, Commitments and Irreversibility, in: 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., and Midgley, P. M.,
Cambridge University Press, Cambridge, United Kingdom and New York, NY,
USA, ISBN 9781107661820, 2013.
Connan, M., Cherel, Y., and Mayzaud, P.: Lipids from stomach oil of
procellariiform seabirds document the importance of myctophid fish in the
Southern Ocean, Limnol. Oceanogr., 52, 2445–2455, 2007.
Cripps, G. C., Watkins, J. L., Hill, H. J., and Atkinson, A.: Fatty acid
content of Antarctic krill Euphausia superba at South Georgia related to regional populations and variations in diet, Mar. Ecol. Prog. Ser., 181, 177–188, 1999.
Crosta, X. and Shemesh, A.: Reconciling down core anticorrelation of diatom
carbon and nitrogen isotopic ratios from the Southern Ocean, Paleoceanography, 17,
10-11–10-18, https://doi.org/10.1029/2000pa000565, 2002.
Croudace, I. W., Rindby, A., and Rothwell, R. G.: ITRAX: Description and
evaluation of a new sediment core scanner, in: New techniques in sediment
core analysis, edited by: Rothwell, R. G., Geological Society Special
Publication, 267, 51–63, https://doi.org/10.1144/GSL.SP.2006.267, 2006.
Delille, B., Vancoppenolle, M., Geilfus, N.-X., Tilbrook, B., Lannuzel, D.,
Schoemann, V., Becquevort, S., Carnat, G., Delille, D., Lancelot, C., Chou,
L., Dieckmann, G. S., and Tison, J.-L.: Southern Ocean CO2 sink: The
contribution of the sea ice, J. Geophys. Res.-Oceans, 119,
6340–6355, https://doi.org/10.1002/2014JC009941, 2014.
Delmont, T. O., Hammar, K. M., Ducklow, H. W., Yager, P. L., and Post, A.
F.: Phaeocystis antarctica blooms strongly influence bacterial community structures in the Amundsen Sea polynya, Front. Microbiol., 5, 646, https://doi.org/10.3389/fmicb.2014.00646, 2014.
Delord, K., Pinet, P., Pinaud, D., Barbraud, C., De Grissac, S., Lewden, A.,
Cherel, Y., and Weimerskirch, H.: Species-specific foraging strategies and
segregation mechanisms of sympatric Antarctic fulmarine petrels throughout
the annual cycle, Ibis, 158, 569–586, https://doi.org/10.1111/ibi.12365, 2016.
Dunbar, R. B. and Leventer, A.: Seasonal variation in carbon isotopic
composition of antarctic sea ice and open-water plankton communities,
Antarct. J. US, 27, 79–81, 1992.
Falla, R. A.: Birds, in: Volume 2 of Reports of the B.A.N.Z. antarctic research expedition 1929-1931 / Series B, B.A.N.Z.A.R. Expedition Committee, 1937.
Färber Lorda, J. and Ceccaldi, H. J.: Relationship of morphometrics,
total carotenoids, and total lipids with activity and sexual and spatial
features in Euphausia superba, Sci. Rep., 10, 13177, https://doi.org/10.1038/s41598-020-69780-8, 2020.
Ferrari, R., Jansen, M. F., Adkins, J. F., Burke, A., Stewart, A. L., and
Thompson, A. F.: Antarctic sea ice control on ocean circulation in present
and glacial climates, P. Natl. Acad. Sci. USA, 111,
8753–8758, https://doi.org/10.1073/pnas.1323922111, 2014.
Fijn, R. C., van Franeker, J. A., and Trathan, P. N.: Dietary variation in
chick-feeding and self-provisioning Cape Petrel Daption capense and Snow
Petrel Pagodroma nivea at Signy Island, South Orkney Islands, Antarctica, Marine Ornithology, 40, 81–87, 2012.
Fischer, H., Fundel, F., Ruth, U., Twarloh, B., Wegner, A., Udisti, R.,
Becagli, S., Castellano, E., Morganti, A., Severi, M., Wolff, E., Littot,
G., Rothlisberger, R., Mulvaney, R., Hutterli, M. A., Kaufmann, P., Federer,
U., Lambert, F., Bigler, M., Hansson, M., Jonsell, U., de Angelis, M.,
Boutron, C., Siggaard-Andersen, M.-L., Steffensen, J. P., Barbante, C.,
Gaspari, V., Gabrielli, P., and Wagenbach, D.: Reconstruction of millennial
changes in dust emission, transport and regional sea ice coverage using the
deep EPICA ice cores from the Atlantic and Indian Ocean sector of
Antarctica, Earth Planet. Sc. Lett., 260, 340–354, 2007.
Francois, R., Altabet, M. A., Goericke, R., McCorkle, D. C., Brunet, C., and
Poisson, A.: Changes in the δ13C of surface water particulate
organic matter across the subtropical convergence in the SW Indian Ocean,
Global Biogeochem. Cy., 7, 627–644, https://doi.org/10.1029/93GB01277, 1993.
Friedrich, C. and Hagen, W.: Lipid contents of five species of notothenioid
fish from high-Antarctic waters and ecological implications, Polar Biol.,
14, 359–369, https://doi.org/10.1007/BF00240256, 1994.
Frölicher, T. L., Joos, F., and Raible, C. C.: Sensitivity of atmospheric CO2 and climate to explosive volcanic eruptions, Biogeosciences, 8, 2317–2339, https://doi.org/10.5194/bg-8-2317-2011, 2011.
Gersonde, R., Abelmann, A., Brathauer, U., Becquey, S., Bianchi, C.,
Cortese, G., Grobe, H., Kuhn, G., Niebler, H.-S., Segl, M., Sieger, R.,
Zielinski, U., and Fütterer, D. K.: Last glacial sea surface
temperatures and sea-ice extent in the Southern Ocean (Atlantic-Indian
Sector): A multiproxy approach, Paleoceanography, 18, 1061, https://doi.org/10.1016/j.quascirev.2004.07.015, 2003.
Gersonde, R., Crosta, X., Abelmann, A., and Armand, L.: Sea-surface
temperature and sea ice distribution of the Southern Ocean at the EPILOG
Last Glacial Maximum–a circum-Antarctic view based on siliceous microfossil
records, Quaternary Sci. Rev., 24, 869–896, 2005.
Goto-Azuma, K., Hirabayashi, M., Motoyama, H., Miyake, T., Kuramoto, T.,
Uemura, R., Igarashi, M., Iizuka, Y., Sakurai, T., Horikawa, S., Suzuki, K.,
Suzuki, T., Fujita, K., Kondo, Y., Hattori, S., and Fujii, Y.: Reduced
marine phytoplankton sulphur emissions in the Southern Ocean during the past
seven glacials, Nat. Commun., 10, 3247, https://doi.org/10.1038/s41467-019-11128-6, 2019.
Grobe, H. and Mackensen, A.: Late Quaternary climatic cycles as recorded in
sediments from the Antarctic continental margin, in: The Antarctic
Paleoenvironment: a Perspective on Global Change, edited by: Kennett, J. P.,
and Warnke, D. A., Antarctic Research Series vol. 56, American Geophysical
Union, Washington, DC, 349–376, ISBN 9781118668061, 1993.
Hammer, Ø., Harper, D. A. T., and Ryan, P. D.: PAST: Paleontological
Statistics Software Package for Education and Data Analysis, Palaeontol.
Electron., 4, 9 pp., https://palaeo-electronica.org/2001_1/past/past.pdf (last access: 1 March 2022), 2001.
Harris, P. G. and Maxwell, J. R.: A novel method for the rapid
determination of chlorin concentrations at high stratigraphic resolution in
marine sediments, Org. Geochem., 23, 853–856, 1995.
Heaton, T. J., Bard, E., Bronk Ramsey, C., Butzin, M., Kohler, P., and Reimer, P. J.: Community comment on “Summer sea-ice variability on the Antarctic margin during the last glacial period reconstructed from snow petrel (Pagodroma nivea) stomach-oil deposits” by Erin L. McClymont et al., Clim. Past Discuss., https://doi.org/10.5194/cp-2021-134-CC1, 2021.
Heaton, T. J., Köhler, P., Butzin, M., Bard, E., Reimer, R. W., Austin,
W. E. N., Bronk Ramsey, C., Grootes, P. M., Hughen, K. A., Kromer, B.,
Reimer, P. J., Adkins, J., Burke, A., Cook, M. S., Olsen, J., and Skinner,
L. C.: Marine20—The Marine Radiocarbon Age Calibration Curve (0–55 000 cal BP), Radiocarbon, 62, 779–820, https://doi.org/10.1017/RDC.2020.68, 2020.
Henley, S. F., Annett, A. L., Ganeshram, R. S., Carson, D. S., Weston, K., Crosta, X., Tait, A., Dougans, J., Fallick, A. E., and Clarke, A.: Factors influencing the stable carbon isotopic composition of suspended and sinking organic matter in the coastal Antarctic sea ice environment, Biogeosciences, 9, 1137–1157, https://doi.org/10.5194/bg-9-1137-2012, 2012.
Hillenbrand, C.-D. and Cortese, G.: Polar stratification: A critical view
from the Southern Ocean, Palaeogeogr. Palaeocl.,
242, 240–252, https://doi.org/10.1016/j.palaeo.2006.06.001, 2006.
Hillenbrand, C.-D., Bentley, M. J., Stolldorf, T. D., Hein, A. S., Kuhn, G.,
Graham, A. G. C., Fogwill, C. J., Kristoffersen, Y., Smith, J. A., Anderson,
J. B., Larter, R. D., Melles, M., Hodgson, D. A., Mulvaney, R., and Sugden,
D. E.: Reconstruction of changes in the Weddell Sea sector of the Antarctic
Ice Sheet since the Last Glacial Maximum, Quaternary Sci. Rev., 100,
111–136, https://doi.org/10.1016/j.quascirev.2013.07.020, 2014.
Hiller, A., Wand, U., Kampft, H., and Stackebrandt, W.: Occupation of the
Antarctic Continent by Petrels During the Past 35 000 Years: Inferences from
a 14C Study of Stomach Oil Deposits, Polar Biol., 9, 69–77, 1988.
Hiller, A., Hermichen, W.-D., and Wand, U.: Radiocarbon-dated subfossil
stomach oil deposits from petrel nesting sites: novel paleoenvironmental
records from continental Antarctica, Radiocarbon, 37, 171–180, 1995.
Horgan, I. E. and Barrett, J. A.: The Use of Lipid Profiles in Comparing
the Diet of Seabirds, in: Antarctic Nutrient Cycles and Food Webs, edited
by: Siegfried, W. R., Condy, P. R., and Laws, R. M., Springer Berlin
Heidelberg, Berlin, Heidelberg, 493–497, ISBN 9783642822773, 1985.
Huang, T., Sun, L., Wang, Y., Liu, X., and Zhu, R.: Penguin population
dynamics for the past 8500 years at Gardner Island, Vestfold Hills,
Antarct. Sci., 21, 571–578, https://doi.org/10.1017/S0954102009990332, 2009.
Imber, M. J.: The Origin of Petrel Stomach Oils: A Review, Condor, 78,
366–369, https://doi.org/10.2307/1367697, 1976.
Jaeger, A. and Cherel, Y.: Isotopic Investigation of Contemporary and
Historic Changes in Penguin Trophic Niches and Carrying Capacity of the
Southern Indian Ocean, PLOS ONE, 6, e16484, https://doi.org/10.1371/journal.pone.0016484,
2011.
Jeffrey, S. W., Mantoura, R. F. C., and Bjørnland, T.: Data for the
identification of 47 key phytoplankton pigments, in: Phytoplankton pigments
in oceanography: guidelines to modern methods, edited by: Jeffrey, S. W.,
Mantoura, R. F. C., and Wright, S. W., UNESCO Publishing, Paris,
ISBN 9231032755, 149–559, 1997.
Johansson, P. and Thor, G.: Observations on the birds of the Vestfjella and
Heimefrontfjella, Dronning Maud Land, Antarctica, 1991/92 and 2001/02,
Marine Ornithology, 32, 43–46, 2004.
Jónasdóttir, S. H.: Fatty Acid Profiles and Production in Marine
Phytoplankton, Mar. Drugs, 17, 151, https://doi.org/10.3390/md17030151, 2019.
Jouzel, J., Masson-Delmotte, V., Cattani, O., Dreyfus, G., Falourd, S., Hoffmann, G., Minster, B., Nouet, J., Barnola, J. M., Chappellaz, J., Fischer, H., Gallet, J. C., Johnsen, S., Leuenberger, M., Loulergue, L., Luethi, D., Oerter, H., Parrenin, F., Raisbeck, G., Raynaud, D., Schilt, A., Schwander, J., Selmo, E., Souchez, R., Spahni, R., Stauffer, B., Steffensen, J. P., Stenni, B., Stocker, T. F., Tison, J. L., Werner, M., and Wolff, E. W.: Orbital and Millennial Antarctic Climate Variability over the Past 800,000 Years, Science, 317, 793–796, 2007.
Ju, S.-J. and Harvey, H. R.: Lipids as markers of nutritional condition and
diet in the Antarctic krill Euphausia superba and Euphausia crystallorophias
during austral winter, Deep-Sea Res. Pt. II, 51, 2199–2214, https://doi.org/10.1016/j.dsr2.2004.08.004, 2004.
Juggins, S.: rioja: Analysis of Quaternary Science Data, R package version 0.9-26, CRAN, https://cran.r-project.org/package=rioja (last access: 17 February 2022), 2020.
Karnovsky, N., Ainley, D. G., and Lee, P.: Chapter 12 The Impact and Importance of Production in Polynyas to Top-Trophic Predators: Three Case Histories, in: Polynyas: Windows to the World, edited by: Smith, W. O. and Barber, D. G., Elsevier, 391–410, ISBN: 9780444529527, 2007.
Kennedy, H., Thomas, D., Kattner, G., Haas, C., and Dieckmann, G.:
Particulate organic matter in Antarctic summer sea ice: Concentration and
stable isotopic composition, Mar. Ecol. Prog. Ser., 238, 1–13,
2002.
La, H. S., Lee, H., Fielding, S., Kang, D., Ha, H. K., Atkinson, A., Park,
J., Siegel, V., Lee, S., and Shin, H. C.: High density of ice krill
(Euphausia crystallorophias) in the Amundsen sea coastal polynya, Antarctica, Deep-Sea Res. Pt. I, 95, 75–84,
https://doi.org/10.1016/j.dsr.2014.09.002, 2015.
Lee, H., Feakins, S. J., Lu, Z., Schimmelmann, A., Sessions, A. L., Tierney,
J. E., and Williams, T. J.: Comparison of three methods for the methylation
of aliphatic and aromatic compounds, Rapid Commun. Mass Spectrom., 31,
1633–1640, https://doi.org/10.1002/rcm.7947, 2017.
Lee, R. F., Nevenzel, J. C., and Paffenhöfer, G. A.: Importance of wax
esters and other lipids in the marine food chain: Phytoplankton and
copepods, Mar. Biol., 9, 99–108, https://doi.org/10.1007/BF00348249, 1971.
Leri, A. C., Hakala, J. A., Marcus, M. A., Lanzirotti, A., Reddy, C. M., and
Myneni, S. C. B.: Natural organobromine in marine sediments: New evidence of
biogeochemical Br cycling, Global Biogeochem. Cy., 24, 2010GB003794, https://doi.org/10.1029/2010GB003794, 2010.
Lewis, R. W.: Studies of the glyceryl ethers of the stomach oil of Leach's
petrel Oceanodroma leucorhoa (Viellot), Comp. Biochem. Physiol., 19, 363–377, 1966.
Liu, X., Nie, Y., Sun, L., and Emslie, S. D.: Eco-environmental implications
of elemental and carbon isotope distributions in ornithogenic sediments from
the Ross Sea region, Antarctica, Geochim. Cosmochim. Ac., 117,
99–114, https://doi.org/10.1016/j.gca.2013.04.013, 2013.
Lucchi, R. G., Rebesco, M., Camerlenghi, A., Busetti, M., Tomadin, L.,
Villa, G., Persico, D., Morigi, C., Bonci, M. C., and Giorgetti, G.:
Mid-late Pleistocene glacimarine sedimentary processes of a high-latitude,
deep-sea sediment drift (Antarctic Peninsula Pacific margin), Mar. Geol., 189, 343–370, https://doi.org/10.1016/S0025-3227(02)00470-X, 2002.
Mackensen, A., Grobe, H., Hubberton, H.-W., Spiess, V., and Futterer, D. K.:
Stable isotope stratigraphy from the Antarctic continental margin during the
last one million years, Mar. Geol., 87, 315–321, 1989.
Mackintosh, A. N., Verleyen, E., O'Brien, P. E., White, D. A., Jones, R. S.,
McKay, R., Dunbar, R., Gore, D. B., Fink, D., Post, A. L., Miura, H.,
Leventer, A., Goodwin, I., Hodgson, D. A., Lilly, K., Crosta, X., Golledge,
N. R., Wagner, B., Berg, S., van Ommen, T., Zwartz, D., Roberts, S. J.,
Vyverman, W., and Masse, G.: Retreat history of the East Antarctic Ice Sheet
since the Last Glacial Maximum, Quaternary Sci. Rev., 100, 10–30,
https://doi.org/10.1016/j.quascirev.2013.07.024, 2014.
Marchant, S. and Higgins, R. J. (Eds.): Handbook of Australian, New Zealand and Antarctic Birds. Volume 1 Part A, Ratites to petrels, Oxford University Press, Melbourne, 735, ISBN 0195532449, 1990.
Marzocchi, A., and Jansen, M. F.: Global cooling linked to increased glacial carbon storage via changes in Antarctic sea ice, Nat. Geosci., 12, 1001–1005, https://doi.org/10.1038/s41561-019-0466-8, 2019.
Mayzaud, P., Chevallier, J., Tavernier, E., Moteki, M., and Koubbi, P.:
Lipid composition of the Antarctic fish Pleuragramma antarcticum. Influence of age class, Polar Sci., 5, 264–271, https://doi.org/10.1016/j.polar.2010.12.003, 2011.
McClymont, E. L., Martinez-Garcia, A., and Rosell-Mele, A.: Benefits of
freeze-drying sediments for the analysis of total chlorins and alkenone
concentrations in marine sediments, Org. Geochem., 38, 1002–1007,
https://doi.org/10.1016/j.orggeochem.2007.01.006, 2007.
McClymont, E. L., Bentley, M. J., Hodgson, D. A., Spencer-Jones, C. L, Wardley, T., West, M., Croudace, I. W., Berg, S., Gröcke, D. R., Kuhn, G., Jamieson, S., Sime, L. C., and Phillips, R. A.: Age model, XRF data, fatty acid distributions and stable isotope analysis for stomach oil deposit WMM7, Dronning Maud Land, PANGAEA [data set], https://doi.org/10.1594/PANGAEA.939211, 2021.
Menviel, L., Mouchet, A., Meissner, K. J., Joos, F., and England, M. H.:
Impact of oceanic circulation changes on atmospheric δ13CO2, Global Biogeochem. Cy., 29, 1944–1961,
https://doi.org/10.1002/2015GB005207, 2015.
Mills, W. F., Xavier, J. C., Bearhop, S., Cherel, Y., Votier, S. C., Waluda,
C. M., and Phillips, R. A.: Long-term trends in albatross diets in relation
to prey availability and breeding success, Mar. Biol., 167, 29, https://doi.org/10.1007/s00227-019-3630-1, 2020.
Mills, W. F., Morley, T. I., Votier, S. C., and Phillips, R. A.: Long-term
inter- and intraspecific dietary variation in sibling seabird species,
Mar. Biol., 168, 31, https://doi.org/10.1007/s00227-021-03839-6, 2021.
Mohrmann, M., Heuzé, C., and Swart, S.: Southern Ocean polynyas in CMIP6 models, The Cryosphere, 15, 4281–4313, https://doi.org/10.5194/tc-15-4281-2021, 2021.
Morales Maqueda, M. A. and Rahmstorf, S.: Did Antarctic sea-ice expansion
cause glacial CO2 decline?, Geophys. Res. Lett., 29,
11-11–11-13, https://doi.org/10.1029/2001GL013240, 2002.
Morales Maqueda, M. A., Willmott, A. J., and Biggs, N. R. T.: Polynya
Dynamics: a Review of Observations and Modeling, Rev. Geophys., 42,
RG1004, https://doi.org/10.1029/2002RG000116, 2004.
Mychra, A. and Tatur, A.: Ecological role of the current and abandoned
penguin rookeries in the land environment of the maritime Antarctic, Pol.
Polar Res., 12, 3–24, 1991.
Nicol, S.: A comparison of Antarctic petrel (Thalassoica antarctica) diets with net samples of Antarctic krill (Euphausia superba) taken from the Prydz Bay region, Polar Biol., 13, 399–403, 1993.
Nicol, S.: Krill, Currents, and Sea Ice: Euphausia superba and Its Changing Environment, BioScience, 56, 111–120, https://doi.org/10.1641/0006-3568(2006)056[0111:KCASIE]2.0.CO;2,
2006.
Olivier, F. and Wotherspoon, S. J.: Modelling habitat selection using
presence-only data: Case study of a colonial hollow nesting bird, the snow
petrel, Ecol. Model., 195, 187–204, https://doi.org/10.1016/j.ecolmodel.2005.10.036, 2006.
Olivier, F., van Franeker, J. A., Creuwels, J. C. S., and Woehler, E. J.:
Variations of snow petrel breeding success in relation to sea-ice extent:
detecting local response to large-scale processes?, Polar Biol., 28,
687–699, 2005.
Paillard, D. and Parrenin, F.: The Antarctic ice sheet and the triggering
of deglaciations, Earth Planet. Sc. Lett., 227, 263–271, 2004.
Palmer Locarnini, S. J. and Presley, B. J.: Trace element concentrations in
Antarctic krill, Euphausia superba, Polar Biol., 15, 283–288, https://doi.org/10.1007/BF00239849, 1995.
Parkinson, C. L.: A 40-y record reveals gradual Antarctic sea ice increases
followed by decreases at rates far exceeding the rates seen in the Arctic,
P. Natl. Acad. Sci. USA, 116, 14414–14423, https://doi.org/10.1073/pnas.1906556116, 2019.
Phillips, R. A., Bearhop, S., McGill, R. A., and Dawson, D. A.: Stable
isotopes reveal individual variation in migration strategies and habitat
preferences in a suite of seabirds during the nonbreeding period, Oecologia,
160, 795–806, https://doi.org/10.1007/s00442-009-1342-9, 2009.
Phillips, R. A., McGill, R. A. R., Dawson, D. A., and Bearhop, S.: Sexual
segregation in distribution, diet and trophic level of seabirds: insights
from stable isotope analysis, Mar. Biol., 158, 2199–2208, 2011.
Polito, M. J., Trivelpiece, W. Z., Karnovsky, N. J., Ng, E., Patterson, W.
P., and Emslie, S. D.: Integrating Stomach Content and Stable Isotope
Analyses to Quantify the Diets of Pygoscelid Penguins, PLOS ONE, 6, e26642, https://doi.org/10.1371/journal.pone.0026642, 2011.
Post, D. M.: Using Stable Isotopes to Estimate Trophic Position: Models,
Methods, and Assumptions, Ecology, 83, 703–718, https://doi.org/10.2307/3071875, 2002.
Quillfeldt, P. and Masello, J. F.: Compound-specific stable isotope
analyses in Falkland Islands seabirds reveal seasonal changes in trophic
positions, BMC Ecology, 20, 21, https://doi.org/10.1186/s12898-020-00288-5, 2020.
Raclot, T., Groscolas, R., and Cherel, Y.: Fatty acid evidence for the
importance of myctophid fishes in the diet of king penguins, Aptenodytes patagonicus, Mar. Biol., 132, 523–533, https://doi.org/10.1007/s002270050418, 1998.
Rae, J. W. B., Burke, A., Robinson, L. F., Adkins, J. F., Chen, T., Cole,
C., Greenop, R., Li, T., Littley, E. F. M., Nita, D. C., Stewart, J. A., and
Taylor, B. J.: CO2 storage and release in the deep Southern Ocean on
millennial to centennial timescales, Nature, 562, 569–573, https://doi.org/10.1038/s41586-018-0614-0, 2018.
Rainbow, P. S.: Copper, cadmium and zinc concentrations in oceanic amphipod
and euphausiid crustaceans, as a source of heavy metals to pelagic seabirds,
Mar. Biol., 103, 513–518, https://doi.org/10.1007/BF00399583, 1989.
Rau, G. H., Ainley, D. G., Bengtson, J. L., Torres, J. J., and Hopkins, T.
L.: 15N
Rethemeyer, J., Gierga, M., Heinze, S., Stolz, A., Wotte, A.,
Wischhöfer, P., Berg, S., Melchert, J., and Dewald, A.: Current sample
preparation and analytical capabilities of the radiocarbon laboratory at
CologneAMS, Radiocarbon, 61, 1449–1460, https://doi.org/10.1017/RDC.2019.16, 2019.
Ridoux, V. and Offredo, C.: The diets of five summer breeding seabirds in
Adélie Land, Antarctica, Polar Biol., 9, 137–145, https://doi.org/10.1007/bf00297168, 1989.
Roche, D. M., Crosta, X., and Renssen, H.: Evaluating Southern Ocean sea-ice
for the Last Glacial Maximum and pre-industrial climates: PMIP-2 models and
data evidence, Quaternary Sci. Rev., 56, 99–106, https://doi.org/10.1016/j.quascirev.2012.09.020, 2012.
Saunders, R. A., Hill, S. L., Tarling, G. A., and Murphy, E. J.: Myctophid
Fish (Family Myctophidae) Are Central Consumers in the Food Web of the
Scotia Sea (Southern Ocean), Frontiers in Marine Science, 6, 530, https://doi.org/10.3389/fmars.2019.00530, 2019.
Seyboth, E., Botta, S., Mendes, C. R. B., Negrete, J., Dalla Rosa, L., and
Secchi, E. R.: Isotopic evidence of the effect of warming on the northern
Antarctic Peninsula ecosystem, Deep Sea Res. Pt. II, 149, 218–228, 2018.
Sherrell, R., Lagerström, M., Forsch, K., Stammerjohn, S., and Yager,
P.: Dynamics of dissolved iron and other bioactive trace metals (Mn, Ni, Cu,
Zn) in the Amundsen Sea Polynya, Antarctica, Elementa, 3, 000071, https://doi.org/10.12952/journal.elementa.000071, 2015.
Sigman, D. M., Fripiat, F., Studer, A. S., Kemeny, P. C., Martínez-García, A., Hain, M. P., Ai, X., Wang, X., Ren, H., and Haug, G. H.: The Southern Ocean during the ice ages: A review of the Antarctic surface isolation hypothesis, with comparison to the North Pacific, Quaternary Sci. Rev., 254, 106732, https://doi.org/10.1016/j.quascirev.2020.106732, 2021.
Smith, J. A., Hillenbrand, C.-D., Pudsey, C. J., Allen, C. S., and Graham,
A. G. C.: The presence of polynyas in the Weddell Sea during the Last
Glacial Period with implications for the reconstruction of sea-ice limits
and ice sheet history, Earth Planet. Sc. Lett., 296, 287–298,
https://doi.org/10.1016/j.epsl.2010.05.008, 2010.
Sprenk, D., Weber, M. E., Kuhn, G., Wennrich, V., Hartmann, T., and Seelos, K.: Seasonal changes in glacial polynya activity inferred from Weddell Sea varves, Clim. Past, 10, 1239–1251, https://doi.org/10.5194/cp-10-1239-2014, 2014.
Steele, W. K.: Stable isotope ratios of Antarctic petrel (Thallassoica antarctica) and snow petrel
(Pagodroma nivea) bone collagen, Polar Biol., 28, 672–679, 2005.
Stephens, B. B. and Keeling, R. F.: The influence of Antarctic sea ice on
glacial-interglacial CO2 variations, Nature, 404, 171–174, 2000.
Thatje, S., Hillenbrand, C.-D., Mackensen, A., and Larter, R.: Life Hung by
a Thread: Endurance of Antarctic Fauna in Glacial Periods, Ecology, 89,
682–692, 2008.
Thor, G. and Low, M.: The persistence of the snow petrel (Pagodroma nivea) in Dronning Maud Land (Antarctica) for over 37 000 years, Polar Biol., 34, 609–613, https://doi.org/10.1007/s00300-010-0912-y, 2011.
Tierney, J. E., Zhu, J., King, J., Malevich, S. B., Hakim, G. J., and
Poulsen, C. J.: Glacial cooling and climate sensitivity revisited, Nature,
584, 569–573, https://doi.org/10.1038/s41586-020-2617-x, 2020.
Trull, T. W. and Armand, L.: Insights into Southern Ocean carbon export
from the δ13C of particles and dissolved inorganic carbon
during the SOIREE iron release experiment, Deep-Sea Res. Pt. II, 48, 2655–2680, https://doi.org/10.1016/S0967-0645(01)00013-3, 2001.
Turner, J., Guarino, M. V., Arnatt, J., Jena, B., Marshall, G. J., Phillips,
T., Bajish, C. C., Clem, K., Wang, Z., Andersson, T., Murphy, E. J., and
Cavanagh, R.: Recent Decrease of Summer Sea Ice in the Weddell Sea,
Antarctica, Geophys. Res. Lett., 47, e2020GL087127, https://doi.org/10.1029/2020GL087127, 2020.
Vallet, C., Beans, C., Koubbi, P., Courcot, L., Hecq, J.-H., and Goffart,
A.: Food preferences of larvae of Antarctic silverfish Pleuragramma
antarcticum Boulenger, 1902 from Terre Adélie coastal waters during
summer 2004, Polar Sci., 5, 239–251, https://doi.org/10.1016/j.polar.2010.12.005, 2011.
Wand, U. and Hermichen, W.-D.: Late Quaternary Ice Level Changes in Central
Dronning Maud Land, East Antarctica, as Inferred from 14C ages of
Mumiyo Deposits in Snow Petrel Colonies, Geol. Jahrbuch, B97, 237–254, 2005.
Wang, S. W., Iverson, S. J., Springer, A. M., and Hatch, S. A.: Fatty acid
signatures of stomach oil and adipose tissue of northern fulmars (Fulmarus glacialis) in Alaska: implications for diet analysis of Procellariiorm birds, J. Comp. Physiol. B, 177, 893–903, 2007.
Warham, J.: The incidence, functions and ecological significance of petrel
stomach oils, Proceedings of the New Zealand Ecological Society, 24, 84–93,
1977.
Warham, J., Watts, R., and Dainty, R. J.: The composition, energy content
and function of the stomach oils of petrels (order, Procellariiformes), J.
Exp. Mar. Biol. Ecol., 23, 1–13, 1976.
Watanabe, Y. Y., Ito, K., Kokubun, N., and Takahashi, A.: Foraging behavior
links sea ice to breeding success in Antarctic penguins, Sci. Adv.,
6, eaba4828, https://doi.org/10.1126/sciadv.aba4828, 2020.
Watanuki, Y. and Thiebot, J.-B.: Factors affecting the importance of
myctophids in the diet of the world's seabirds, Mar. Biol., 165, 79, https://doi.org/10.1007/s00227-018-3334-y, 2018.
Watts, R. and Warham, J.: Structure of some intact lipids of petrel stomach
oils, Lipids, 11, 423–429, https://doi.org/10.1007/bf02532831, 1976.
Weber, M. E., Bonani, G., and Fütterer, K. D.: Sedimentation processes
within channel-ridge systems, southeastern Weddell Sea, Antarctica,
Paleoceanography, 9, 1027–1048, 1994.
Xiao, W., Esper, O., and Gersonde, R.: Last Glacial – Holocene climate
variability in the Atlantic sector of the Southern Ocean, Quaternary Sci. Rev., 135, 115–137, https://doi.org/10.1016/j.quascirev.2016.01.023, 2016.
Short summary
Sea ice is important for our climate system and for the unique ecosystems it supports. We present a novel way to understand past Antarctic sea-ice ecosystems: using the regurgitated stomach contents of snow petrels, which nest above the ice sheet but feed in the sea ice. During a time when sea ice was more extensive than today (24 000–30 000 years ago), we show that snow petrel diet had varying contributions of fish and krill, which we interpret to show changing sea-ice distribution.
Sea ice is important for our climate system and for the unique ecosystems it supports. We...
