Articles | Volume 18, issue 1
https://doi.org/10.5194/cp-18-129-2022
© 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-18-129-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
24 Jan 2022
Research article |
| 24 Jan 2022
| 24 Jan 2022
Reconstructing Antarctic winter sea-ice extent during Marine Isotope Stage 5e
British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, UK
Ocean and Earth Science, National Oceanography Centre, University of Southampton Waterfront Campus, European Way, Southampton, SO14 3ZH, UK
Claire S. Allen
British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, UK
Louise C. Sime
British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, UK
Xavier Crosta
UMR 5805 EPOC, Université de Bordeaux, CNRS, EPHE, 33615 Pessac, France
Claus-Dieter Hillenbrand
British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, UK
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Matthew Chadwick, Xavier Crosta, Oliver Esper, Lena Thöle, and Karen E. Kohfeld
Clim. Past, 18, 1815–1829, https://doi.org/10.5194/cp-18-1815-2022, https://doi.org/10.5194/cp-18-1815-2022, 2022
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Algae preserved in seafloor sediments have allowed us to reconstruct how Antarctic sea ice has varied between cold and warm time periods in the last 130 000 years. The patterns and timings of sea-ice increase and decrease vary between different parts of the Southern Ocean. Sea ice is most sensitive to changing climate at the external edges of Southern Ocean gyres (large areas of rotating ocean currents).
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.
Sentia Goursaud Oger, Louise C. Sime, and Max Holloway
Clim. Past, 20, 2539–2560, https://doi.org/10.5194/cp-20-2539-2024, https://doi.org/10.5194/cp-20-2539-2024, 2024
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Antarctic ice cores provide information about past temperatures. Here, we run new climate model simulations, including stable water isotopes for the historical period. Across one-third of Antarctica, there is no strong connection between isotopes and temperature and a weak connection for most of the rest of Antarctica. This disconnect between isotopes and temperature is largely driven by changes in Antarctic sea ice. Our results are helpful for temperature reconstructions from ice core records.
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Clim. Past, 20, 2431–2454, https://doi.org/10.5194/cp-20-2431-2024, https://doi.org/10.5194/cp-20-2431-2024, 2024
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Dansgaard–Oeschger events are a series of abrupt past climate change events during which the atmosphere, sea ice, and ocean in the North Atlantic underwent rapid changes. One current topic of interest is the order in which these different changes occurred, which remains unknown. In this work, we find that the current best method used to investigate this topic is subject to substantial bias. This implies that it is not possible to reliably determine the order of the different changes.
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Ice sheet models can help predict how Antarctica's ice sheets respond to environmental change, and such models benefit from comparison to geological data. Here, we use an ice sheet model output, plus other data, to predict the erosion of debris and trace its transport to where it is deposited on the ocean floor. This allows the results of ice sheet modelling to be directly and quantitively compared to real-world data, helping to reduce uncertainty regarding Antarctic sea level contribution.
Jack T. R. Wilkin, Sev Kender, Rowan Dejardin, Claire S. Allen, Victoria L. Peck, George E. A. Swann, Erin L. McClymont, James D. Scourse, Kate Littler, and Melanie J. Leng
J. Micropalaeontol., 43, 165–186, https://doi.org/10.5194/jm-43-165-2024, https://doi.org/10.5194/jm-43-165-2024, 2024
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The sub-Antarctic island of South Georgia has a dynamic glacial history and is sensitive to climate change. Using benthic foraminifera and various geochemical proxies, we reconstruct inner–middle shelf productivity and infer glacial evolution since the late deglacial, identifying new mid–late-Holocene glacial readvances. Fursenkoina fusiformis acts as a good proxy for productivity.
Allison P. Lepp, Lauren E. Miller, John B. Anderson, Matt O'Regan, Monica C. M. Winsborrow, James A. Smith, Claus-Dieter Hillenbrand, Julia S. Wellner, Lindsay O. Prothro, and Evgeny A. Podolskiy
The Cryosphere, 18, 2297–2319, https://doi.org/10.5194/tc-18-2297-2024, https://doi.org/10.5194/tc-18-2297-2024, 2024
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Shape and surface texture of silt-sized grains are measured to connect marine sediment records with subglacial water flow. We find that grain shape alteration is greatest in glaciers where high-energy drainage events and abundant melting of surface ice are inferred and that the surfaces of silt-sized sediments preserve evidence of glacial transport. Our results suggest grain shape and texture may reveal whether glaciers previously experienced temperate conditions with more abundant meltwater.
Qinggang Gao, Emilie Capron, Louise C. Sime, Rachael H. Rhodes, Rahul Sivankutty, Xu Zhang, Bette L. Otto-Bliesner, and Martin Werner
EGUsphere, https://doi.org/10.5194/egusphere-2024-1261, https://doi.org/10.5194/egusphere-2024-1261, 2024
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Marine sediment and ice core records suggest a warmer Southern Ocean and Antarctica at the early last interglacial, ~127 thousand years ago. However, when only forced by orbital parameters and greenhouse gas concentrations during that period, state-of-the-art climate models do not reproduce the magnitude of warming. Here we show that much of the warming at southern mid-to-high latitudes can be reproduced by a UK climate model HadCM3 with a 3000-year freshwater forcing over the North Atlantic.
Qinggang Gao, Louise C. Sime, Alison J. McLaren, Thomas J. Bracegirdle, Emilie Capron, Rachael H. Rhodes, Hans Christian Steen-Larsen, Xiaoxu Shi, and Martin Werner
The Cryosphere, 18, 683–703, https://doi.org/10.5194/tc-18-683-2024, https://doi.org/10.5194/tc-18-683-2024, 2024
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Antarctic precipitation is a crucial component of the climate system. Its spatio-temporal variability impacts sea level changes and the interpretation of water isotope measurements in ice cores. To better understand its climatic drivers, we developed water tracers in an atmospheric model to identify moisture source conditions from which precipitation originates. We find that mid-latitude surface winds exert an important control on moisture availability for Antarctic precipitation.
Isabel A. Dove, Ian W. Bishop, Xavier Crosta, Natascha Riedinger, R. Patrick Kelly, and Rebecca S. Robinson
EGUsphere, https://doi.org/10.5194/egusphere-2023-2564, https://doi.org/10.5194/egusphere-2023-2564, 2023
Preprint archived
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The diatom-bound nitrogen isotope proxy is used to study how efficiently diatoms in the Southern Ocean help to remove CO2 from the atmosphere, but may be biased by different diatom species. We examine a specific type of diatom, Chaetoceros resting spores (CRS), commonly preserved in Southern Ocean sediments. We find that CRS record surprisingly low δ15NDB values compared to other diatoms, yet changes in their relative abundance over time does not significantly bias previously published records.
Benoit S. Lecavalier, Lev Tarasov, Greg Balco, Perry Spector, Claus-Dieter Hillenbrand, Christo Buizert, Catherine Ritz, Marion Leduc-Leballeur, Robert Mulvaney, Pippa L. Whitehouse, Michael J. Bentley, and Jonathan Bamber
Earth Syst. Sci. Data, 15, 3573–3596, https://doi.org/10.5194/essd-15-3573-2023, https://doi.org/10.5194/essd-15-3573-2023, 2023
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The Antarctic Ice Sheet Evolution constraint database version 2 (AntICE2) consists of a large variety of observations that constrain the evolution of the Antarctic Ice Sheet over the last glacial cycle. This includes observations of past ice sheet extent, past ice thickness, past relative sea level, borehole temperature profiles, and present-day bedrock displacement rates. The database is intended to improve our understanding of past Antarctic changes and for ice sheet model calibrations.
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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Greenland ice core records feature Dansgaard–Oeschger (D–O) events, abrupt warming episodes followed by a gradual-cooling phase during mid-glacial periods. There is uncertainty whether current climate models can effectively represent the processes that cause D–O events. Here, we propose a Marine Isotopic Stage 3 (MIS3) baseline protocol which is intended to provide modelling groups investigating D–O oscillations with a common framework.
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.
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 W. Marschalek, Edward Gasson, Tina van de Flierdt, Claus-Dieter Hillenbrand, Martin J. Siegert, and Liam Holder
Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2023-8, https://doi.org/10.5194/gmd-2023-8, 2023
Revised manuscript not accepted
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Ice sheet models can help predict how Antarctica’s ice sheets respond to environmental change; such models benefit from comparison to geological data. Here, we use ice sheet model results, plus other data, to predict the erosion of Antarctic debris and trace its transport to where it is deposited on the ocean floor. This allows the results of ice sheet modelling to be directly and quantitively compared to real-world data, helping to reduce uncertainty regarding Antarctic sea level contribution.
Matthew Chadwick, Xavier Crosta, Oliver Esper, Lena Thöle, and Karen E. Kohfeld
Clim. Past, 18, 1815–1829, https://doi.org/10.5194/cp-18-1815-2022, https://doi.org/10.5194/cp-18-1815-2022, 2022
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Algae preserved in seafloor sediments have allowed us to reconstruct how Antarctic sea ice has varied between cold and warm time periods in the last 130 000 years. The patterns and timings of sea-ice increase and decrease vary between different parts of the Southern Ocean. Sea ice is most sensitive to changing climate at the external edges of Southern Ocean gyres (large areas of rotating ocean currents).
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.
Dieter R. Tetzner, Elizabeth R. Thomas, Claire S. Allen, and Mackenzie M. Grieman
Clim. Past, 18, 1709–1727, https://doi.org/10.5194/cp-18-1709-2022, https://doi.org/10.5194/cp-18-1709-2022, 2022
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Changes in the Southern Hemisphere westerly winds are drivers of recent environmental changes in West Antarctica. However, our understanding of this relationship is limited by short and sparse observational records. Here we present the first regional wind study based on the novel use of diatoms preserved in Antarctic ice cores. Our results demonstrate that diatom abundance is the optimal record for reconstructing wind strength variability over the Southern Hemisphere westerly wind belt.
Joanne S. Johnson, Ryan A. Venturelli, Greg Balco, Claire S. Allen, Scott Braddock, Seth Campbell, Brent M. Goehring, Brenda L. Hall, Peter D. Neff, Keir A. Nichols, Dylan H. Rood, Elizabeth R. Thomas, and John Woodward
The Cryosphere, 16, 1543–1562, https://doi.org/10.5194/tc-16-1543-2022, https://doi.org/10.5194/tc-16-1543-2022, 2022
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Recent studies have suggested that some portions of the Antarctic Ice Sheet were less extensive than present in the last few thousand years. We discuss how past ice loss and regrowth during this time would leave its mark on geological and glaciological records and suggest ways in which future studies could detect such changes. Determining timing of ice loss and gain around Antarctica and conditions under which they occurred is critical for preparing for future climate-warming-induced changes.
Ryan A. Green, Laurie Menviel, Katrin J. Meissner, Xavier Crosta, Deepak Chandan, Gerrit Lohmann, W. Richard Peltier, Xiaoxu Shi, and Jiang Zhu
Clim. Past, 18, 845–862, https://doi.org/10.5194/cp-18-845-2022, https://doi.org/10.5194/cp-18-845-2022, 2022
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Climate models are used to predict future climate changes and as such, it is important to assess their performance in simulating past climate changes. We analyze seasonal sea-ice cover over the Southern Ocean simulated from numerical PMIP3, PMIP4 and LOVECLIM simulations during the Last Glacial Maximum (LGM). Comparing these simulations to proxy data, we provide improved estimates of LGM seasonal sea-ice cover. Our estimate of summer sea-ice extent is 20 %–30 % larger than previous estimates.
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.
Dieter R. Tetzner, Claire S. Allen, and Elizabeth R. Thomas
The Cryosphere, 16, 779–798, https://doi.org/10.5194/tc-16-779-2022, https://doi.org/10.5194/tc-16-779-2022, 2022
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The presence of diatoms in Antarctic ice cores has been scarcely documented and poorly understood. Here we present a detailed analysis of the spatial and temporal distribution of the diatom record preserved in a set of Antarctic ice cores. Our results reveal that the timing and amount of diatoms deposited present a strong geographical division. This study highlights the potential of the diatom record preserved in Antarctic ice cores to provide useful information about past environmental changes.
Erin L. McClymont, Michael J. Bentley, Dominic A. Hodgson, Charlotte L. Spencer-Jones, Thomas Wardley, Martin D. West, Ian W. Croudace, Sonja Berg, Darren R. Gröcke, Gerhard Kuhn, Stewart S. R. Jamieson, Louise Sime, and Richard A. Phillips
Clim. Past, 18, 381–403, https://doi.org/10.5194/cp-18-381-2022, https://doi.org/10.5194/cp-18-381-2022, 2022
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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.
Kelly-Anne Lawler, Giuseppe Cortese, Matthieu Civel-Mazens, Helen Bostock, Xavier Crosta, Amy Leventer, Vikki Lowe, John Rogers, and Leanne K. Armand
Earth Syst. Sci. Data, 13, 5441–5453, https://doi.org/10.5194/essd-13-5441-2021, https://doi.org/10.5194/essd-13-5441-2021, 2021
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Radiolarians found in marine sediments are used to reconstruct past Southern Ocean environments. This requires a comprehensive modern dataset. The Southern Ocean Radiolarian (SO-RAD) dataset includes radiolarian counts from sites in the Southern Ocean. It can be used for palaeoceanographic reconstructions or to study modern species diversity and abundance. We describe the data collection and include recommendations for users unfamiliar with procedures typically used by the radiolarian community.
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.
Nele Lamping, Juliane Müller, Jens Hefter, Gesine Mollenhauer, Christian Haas, Xiaoxu Shi, Maria-Elena Vorrath, Gerrit Lohmann, and Claus-Dieter Hillenbrand
Clim. Past, 17, 2305–2326, https://doi.org/10.5194/cp-17-2305-2021, https://doi.org/10.5194/cp-17-2305-2021, 2021
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We analysed biomarker concentrations on surface sediment samples from the Antarctic continental margin. Highly branched isoprenoids and GDGTs are used for reconstructing recent sea-ice distribution patterns and ocean temperatures respectively. We compared our biomarker-based results with data obtained from satellite observations and estimated from a numerical model and find reasonable agreements. Further, we address caveats and provide recommendations for future investigations.
Kate E. Ashley, Xavier Crosta, Johan Etourneau, Philippine Campagne, Harry Gilchrist, Uthmaan Ibraheem, Sarah E. Greene, Sabine Schmidt, Yvette Eley, Guillaume Massé, and James Bendle
Biogeosciences, 18, 5555–5571, https://doi.org/10.5194/bg-18-5555-2021, https://doi.org/10.5194/bg-18-5555-2021, 2021
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We explore the potential for the use of carbon isotopes of algal fatty acid as a new proxy for past primary productivity in Antarctic coastal zones. Coastal polynyas are hotspots of primary productivity and are known to draw down CO2 from the atmosphere. Reconstructions of past productivity changes could provide a baseline for the role of these areas as sinks for atmospheric CO2.
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.
Fanny Lhardy, Nathaëlle Bouttes, Didier M. Roche, Xavier Crosta, Claire Waelbroeck, and Didier Paillard
Clim. Past, 17, 1139–1159, https://doi.org/10.5194/cp-17-1139-2021, https://doi.org/10.5194/cp-17-1139-2021, 2021
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Climate models struggle to simulate a LGM ocean circulation in agreement with paleotracer data. Using a set of simulations, we test the impact of boundary conditions and other modelling choices. Model–data comparisons of sea-surface temperatures and sea-ice cover support an overall cold Southern Ocean, with implications on the AMOC strength. Changes in implemented boundary conditions are not sufficient to simulate a shallower AMOC; other mechanisms to better represent convection are required.
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.
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.
Kate E. Ashley, Robert McKay, Johan Etourneau, Francisco J. Jimenez-Espejo, Alan Condron, Anna Albot, Xavier Crosta, Christina Riesselman, Osamu Seki, Guillaume Massé, Nicholas R. Golledge, Edward Gasson, Daniel P. Lowry, Nicholas E. Barrand, Katelyn Johnson, Nancy Bertler, Carlota Escutia, Robert Dunbar, and James A. Bendle
Clim. Past, 17, 1–19, https://doi.org/10.5194/cp-17-1-2021, https://doi.org/10.5194/cp-17-1-2021, 2021
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We present a multi-proxy record of Holocene glacial meltwater input, sediment transport, and sea-ice variability off East Antarctica. Our record shows that a rapid Antarctic sea-ice increase during the mid-Holocene (~ 4.5 ka) occurred against a backdrop of increasing glacial meltwater input and gradual climate warming. We suggest that mid-Holocene ice shelf cavity expansion led to cooling of surface waters and sea-ice growth, which slowed basal ice shelf melting.
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
Chris S. M. Turney, Richard T. Jones, Nicholas P. McKay, Erik van Sebille, Zoë A. Thomas, Claus-Dieter Hillenbrand, and Christopher J. Fogwill
Earth Syst. Sci. Data, 12, 3341–3356, https://doi.org/10.5194/essd-12-3341-2020, https://doi.org/10.5194/essd-12-3341-2020, 2020
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The Last Interglacial (129–116 ka) experienced global temperatures and sea levels higher than today. The direct contribution of warmer conditions to global sea level (thermosteric) are uncertain. We report a global network of sea surface temperatures. We find mean global annual temperature anomalies of 0.2 ± 0.1˚C and an early maximum peak of 0.9 ± 0.1˚C. Our reconstruction suggests warmer waters contributed on average 0.08 ± 0.1 m and a peak contribution of 0.39 ± 0.1 m to global sea level.
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.
Kelly A. Hogan, Robert D. Larter, Alastair G. C. Graham, Robert Arthern, James D. Kirkham, Rebecca L. Totten, Tom A. Jordan, Rachel Clark, Victoria Fitzgerald, Anna K. Wåhlin, John B. Anderson, Claus-Dieter Hillenbrand, Frank O. Nitsche, Lauren Simkins, James A. Smith, Karsten Gohl, Jan Erik Arndt, Jongkuk Hong, and Julia Wellner
The Cryosphere, 14, 2883–2908, https://doi.org/10.5194/tc-14-2883-2020, https://doi.org/10.5194/tc-14-2883-2020, 2020
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The sea-floor geometry around the rapidly changing Thwaites Glacier is a key control on warm ocean waters reaching the ice shelf and grounding zone beyond. This area was previously unsurveyed due to icebergs and sea-ice cover. The International Thwaites Glacier Collaboration mapped this area for the first time in 2019. The data reveal troughs over 1200 m deep and, as this region is thought to have only ungrounded recently, provide key insights into the morphology beneath the grounded ice sheet.
Lisa Claire Orme, Xavier Crosta, Arto Miettinen, Dmitry V. Divine, Katrine Husum, Elisabeth Isaksson, Lukas Wacker, Rahul Mohan, Olivier Ther, and Minoru Ikehara
Clim. Past, 16, 1451–1467, https://doi.org/10.5194/cp-16-1451-2020, https://doi.org/10.5194/cp-16-1451-2020, 2020
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A record of past sea temperature in the Indian sector of the Southern Ocean, spanning the last 14 200 years, has been developed by analysis of fossil diatoms in marine sediment. During the late deglaciation the reconstructed temperature changes were highly similar to those over Antarctica, most likely due to a reorganisation of global ocean and atmospheric circulation. During the last 11 600 years temperatures gradually cooled and became increasingly variable.
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.
Jan Erik Arndt, Robert D. Larter, Claus-Dieter Hillenbrand, Simon H. Sørli, Matthias Forwick, James A. Smith, and Lukas Wacker
The Cryosphere, 14, 2115–2135, https://doi.org/10.5194/tc-14-2115-2020, https://doi.org/10.5194/tc-14-2115-2020, 2020
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We interpret landforms on the seabed and investigate sediment cores to improve our understanding of the past ice sheet development in this poorly understood part of Antarctica. Recent crack development of the Brunt ice shelf has raised concerns about its stability and the security of the British research station Halley. We describe ramp-shaped bedforms that likely represent ice shelf grounding and stabilization locations of the past that may reflect an analogue to the process going on now.
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-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.
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, 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.
Nathaelle Bouttes, Didier Swingedouw, Didier M. Roche, Maria F. Sanchez-Goni, and Xavier Crosta
Clim. Past, 14, 239–253, https://doi.org/10.5194/cp-14-239-2018, https://doi.org/10.5194/cp-14-239-2018, 2018
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Atmospheric CO2 is key for climate change. CO2 is lower during the oldest warm period of the last million years, the interglacials, than during the most recent ones (since 430 000 years ago). This difference has not been explained yet, but could be due to changes of ocean circulation. We test this hypothesis and the role of vegetation and ice sheets using an intermediate complexity model. We show that only small changes of CO2 can be obtained, underlying missing feedbacks or mechanisms.
Rowan Dejardin, Sev Kender, Claire S. Allen, Melanie J. Leng, George E. A. Swann, and Victoria L. Peck
J. Micropalaeontol., 37, 25–71, https://doi.org/10.5194/jm-37-25-2018, https://doi.org/10.5194/jm-37-25-2018, 2018
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.
Philippine Campagne, Xavier Crosta, Sabine Schmidt, Marie Noëlle Houssais, Olivier Ther, and Guillaume Massé
Biogeosciences, 13, 4205–4218, https://doi.org/10.5194/bg-13-4205-2016, https://doi.org/10.5194/bg-13-4205-2016, 2016
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Diatoms and biomarkers have been recently used for palaeoclimate reconstructions in the Southern Ocean. Few sediment-based ecological studies have investigated their relationships with environmental conditions. Here, we compare high-resolution sedimentary records with meteorological data to study relationships between our proxies and recent atmospheric and sea surface changes. Our results indicate that coupled wind pattern and sea surface variability act as the proximal forcing at that scale.
J. Etourneau, L. G. Collins, V. Willmott, J.-H. Kim, L. Barbara, A. Leventer, S. Schouten, J. S. Sinninghe Damsté, A. Bianchini, V. Klein, X. Crosta, and G. Massé
Clim. Past, 9, 1431–1446, https://doi.org/10.5194/cp-9-1431-2013, https://doi.org/10.5194/cp-9-1431-2013, 2013
P. Mathiot, H. Goosse, X. Crosta, B. Stenni, M. Braida, H. Renssen, C. J. Van Meerbeeck, V. Masson-Delmotte, A. Mairesse, and S. Dubinkina
Clim. Past, 9, 887–901, https://doi.org/10.5194/cp-9-887-2013, https://doi.org/10.5194/cp-9-887-2013, 2013
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: Ice Dynamics | Archive: Marine Archives | Timescale: Pleistocene
Ice-proximal sea-ice reconstruction in Powell Basin, Antarctica since the Last Interglacial
Sea ice and productivity changes over the last glacial cycle in the Adélie Land region, East Antarctica, based on diatom assemblage variability
Compilation of Southern Ocean sea-ice records covering the last glacial-interglacial cycle (12–130 ka)
Reconstructing the evolution of ice sheets, sea level, and atmospheric CO2 during the past 3.6 million years
The De Long Trough: a newly discovered glacial trough on the East Siberian continental margin
Sedimentary record from the Canada Basin, Arctic Ocean: implications for late to middle Pleistocene glacial history
A Late Pleistocene sea level stack
Sea level ~400 000 years ago (MIS 11): analogue for present and future sea-level?
Wee Wei Khoo, Juliane Müller, Oliver Esper, Wenshen Xiao, Christian Stepanek, Paul Gierz, Gerrit Lohmann, Walter Geibert, Jens Hefter, and Gesine Mollenhauer
EGUsphere, https://doi.org/10.5194/egusphere-2024-246, https://doi.org/10.5194/egusphere-2024-246, 2024
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Using a multiproxy approach, we analyzed biomarkers and diatom assemblages from a marine sediment core from the Powell Basin, Weddell Sea. The results reveal the first continuous coastal Antarctic sea ice record since the Last Penultimate Glacial. Our findings contribute valuable insights into past glacial-interglacial sea ice response to a changing climate and enhance our understanding of the ocean-sea ice-ice shelf interactions and dynamics.
Lea Pesjak, Andrew McMinn, Zanna Chase, and Helen Bostock
Clim. Past, 19, 419–437, https://doi.org/10.5194/cp-19-419-2023, https://doi.org/10.5194/cp-19-419-2023, 2023
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This study uses diatom assemblages, biogenic silica and Si/Al data over the last 140 kyr from core TAN1302-44 (64°54' S, 144°32' E) to define glacial-to-interglacial paleoenvironments near Antarctica with respect to sea ice duration and ocean circulation. It has found that the sea ice season increased gradually during the last glacial, reaching a maximum before decreasing at the end of MIS 2. Following this, Circumpolar Deep Water increased relative to other times prior to ice sheet retreat.
Matthew Chadwick, Xavier Crosta, Oliver Esper, Lena Thöle, and Karen E. Kohfeld
Clim. Past, 18, 1815–1829, https://doi.org/10.5194/cp-18-1815-2022, https://doi.org/10.5194/cp-18-1815-2022, 2022
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Algae preserved in seafloor sediments have allowed us to reconstruct how Antarctic sea ice has varied between cold and warm time periods in the last 130 000 years. The patterns and timings of sea-ice increase and decrease vary between different parts of the Southern Ocean. Sea ice is most sensitive to changing climate at the external edges of Southern Ocean gyres (large areas of rotating ocean currents).
Constantijn J. Berends, Bas de Boer, and Roderik S. W. van de Wal
Clim. Past, 17, 361–377, https://doi.org/10.5194/cp-17-361-2021, https://doi.org/10.5194/cp-17-361-2021, 2021
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For the past 2.6 million years, the Earth has experienced glacial cycles, where vast ice sheets periodically grew to cover large parts of North America and Eurasia. In the earlier part of this period, this happened every 40 000 years. This value changed 1.2 million years ago to 100 000 years: the Mid-Pleistocene Transition. We investigate this interesting period using an ice-sheet model, studying the interactions between ice sheets and the global climate.
Matt O'Regan, Jan Backman, Natalia Barrientos, Thomas M. Cronin, Laura Gemery, Nina Kirchner, Larry A. Mayer, Johan Nilsson, Riko Noormets, Christof Pearce, Igor Semiletov, Christian Stranne, and Martin Jakobsson
Clim. Past, 13, 1269–1284, https://doi.org/10.5194/cp-13-1269-2017, https://doi.org/10.5194/cp-13-1269-2017, 2017
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Past glacial activity on the East Siberian continental margin is poorly known, partly due to the lack of geomorphological evidence. Here we present geophysical mapping and sediment coring data from the East Siberian shelf and slope revealing the presence of a glacially excavated cross-shelf trough reaching to the continental shelf edge north of the De Long Islands. The data provide direct evidence for extensive glacial activity on the Siberian shelf that predates the Last Glacial Maximum.
Linsen Dong, Yanguang Liu, Xuefa Shi, Leonid Polyak, Yuanhui Huang, Xisheng Fang, Jianxing Liu, Jianjun Zou, Kunshan Wang, Fuqiang Sun, and Xuchen Wang
Clim. Past, 13, 511–531, https://doi.org/10.5194/cp-13-511-2017, https://doi.org/10.5194/cp-13-511-2017, 2017
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In this manuscript, we present the results of our study conducted for a sediment core (ARC4-BN05) collected in the Arctic Ocean. Detailed examination of clay and bulk mineralogy along with grain size, content of Ca and Mn, and planktonic foraminiferal numbers in core ARC4–BN05 provides important new information about sedimentary environments and provenance. Based on these proxies, we try to reveal late to middle Pleistocene glacial history.
Rachel M. Spratt and Lorraine E. Lisiecki
Clim. Past, 12, 1079–1092, https://doi.org/10.5194/cp-12-1079-2016, https://doi.org/10.5194/cp-12-1079-2016, 2016
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This study presents an average of seven Late Pleistocene sea level records, which improves the signal-to-noise ratio for estimates of sea level change during glacial cycles of the past 800 000 years.
D. Q. Bowen
Clim. Past, 6, 19–29, https://doi.org/10.5194/cp-6-19-2010, https://doi.org/10.5194/cp-6-19-2010, 2010
Cited articles
Abernathey, R. P., Cerovecki, I., Holland, P. R., Newsom, E., Mazloff, M.,
and Talley, L. D.: Water-mass transformation by sea ice in the upper branch
of the Southern Ocean overturning, Nat. Geosci., 9, 596–601, 2016.
Anderson, R., Kalk, P., Froelich, F., Flleisher, M., Bouchard, G., and Schwartz, R.: PA9802-04-01, Lamont-Doherty Core Repository at Columbia University (LDCR) [sample], available at: http://igsn.org/DSR0003YW (last access: 18 January 2022), 1998.
Armand, L. and Leventer, A.: Palaeo sea ice distribution and reconstruction
derived from the geological records, in: Sea Ice, 2nd edn., edited by: Thomas, D. N. and Dieckmann, G. S., Wiley-Blackwell, https://doi.org/10.1002/9781444317145.ch13, 2010.
Armand, L. K., Crosta, X., Romero, O., and Pichon, J.-J.: The biogeography
of major diatom taxa in Southern Ocean sediments: 1. Sea ice related
species, Palaeogeogr. Palaeocl., 223, 93–126,
2005.
Atkinson, A., Hill, S. L., Pakhomov, E. A., Siegel, V., Anadon, R., Chiba, S., Daly, K. L., Downie, R., Fielding, S., Fretwell, P., Gerrish, L., Hosie, G. W., Jessopp, M. J., Kawaguchi, S., Krafft, B. A., Loeb, V., Nishikawa, J., Peat, H. J., Reiss, C. S., Ross, R. M., Quetin, L. B., Schmidt, K., Steinberg, D. K., Subramaniam, R. C., Tarling, G. A., and Ward, P.: KRILLBASE: a circumpolar database of Antarctic krill and salp numerical densities, 1926–2016, Earth Syst. Sci. Data, 9, 193–210, https://doi.org/10.5194/essd-9-193-2017, 2017.
Bareille, G., Grousset, F. E., Labracherie, M., Labeyrie, L. D., and Petit,
J.-R.: Origin of detrital fluxes in the southeast Indian Ocean during the
last climatic cycles, Paleoceanography, 9, 799–819, 1994.
Bazin, L., Landais, A., Lemieux-Dudon, B., Toyé Mahamadou Kele, H., Veres, D., Parrenin, F., Martinerie, P., Ritz, C., Capron, E., Lipenkov, V., Loutre, M.-F., Raynaud, D., Vinther, B., Svensson, A., Rasmussen, S. O., Severi, M., Blunier, T., Leuenberger, M., Fischer, H., Masson-Delmotte, V., Chappellaz, J., and Wolff, E.: An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120–800 ka, Clim. Past, 9, 1715–1731, https://doi.org/10.5194/cp-9-1715-2013, 2013.
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, 2016.
Bianchi, C. and Gersonde, R.: The Southern Ocean surface between Marine
Isotope Stages 6 and 5d: Shape and timing of climate changes,
Palaeogeogr. Palaeocl., 187, 151–177, 2002.
Bintanja, R., van Oldenborgh, G. J., Drijfhout, S. S., Wouters, B., and
Katsman, C. A.: Important role for ocean warming and increased ice-shelf
melt in Antarctic sea-ice expansion, Nat. Geosci., 6, 376–379, 2013.
Bouttes, N., Paillard, D., and Roche, D. M.: Impact of brine-induced stratification on the glacial carbon cycle, Clim. Past, 6, 575–589, https://doi.org/10.5194/cp-6-575-2010, 2010.
Brambati, A., Melis, R., Quaia, T., and Salvi, G.: Late Quaternary climatic
changes in the Ross Sea area, Antarctica, in: Antarctica at the close of a
Millenium, edited by: Gamble, J. A., Skinner, D. N. B., and Henrys, S., 35,
Proceedings Volume 8th International Symposium on Antarctic Earth Sciences, July 1999, Royal Society of New Zealand Bulletin, Wellington, New Zealand, ISBN 1877264067, 2002.
Bronselaer, B., Winton, M., Griffies, S. M., Hurlin, W. J., Rodgers, K. B.,
Sergienko, O. V., Stouffer, R. J., and Russell, J. L.: Change in future
climate due to Antarctic meltwater, Nature, 564, 53–58, 2018.
Burckle, L. H., Robinson, D., and Cooke, D.: Reappraisal of sea-ice
distribution in Atlantic and Pacific sectors of the Southern Ocean at 18 000 yr BP, Nature, 299, 435–437, 1982.
Burckle, L. H., Jacobs, S. S., and McLaughlin, R. B.: Late austral spring
diatom distribution between New Zealand and the Ross Ice Shelf, Antarctica:
hydrography and sediment correlations, Micropaleontology, 33, 74–81, 1987.
Capron, E., Govin, A., Stone, E. J., Masson-Delmotte, V., Mulitza, S.,
Otto-Bliesner, B., Rasmussen, T. L., Sime, L. C., Waelbroeck, C., and Wolff,
E. W.: Temporal and spatial structure of multi-millennial temperature
changes at high latitudes during the Last Interglacial, Quaternary Sci. Rev., 103, 116–133, 2014.
Capron, E., Govin, A., Feng, R., Otto-Bliesner, B. L., and Wolff, E. W.:
Critical evaluation of climate syntheses to benchmark CMIP6/PMIP4 127 ka
Last Interglacial simulations in the high-latitude regions, Quaternary Sci. Rev., 168, 137–150, 2017.
Ceccaroni, L., Frank, M., Frignani, M., Langone, L., Ravaioli, M., and
Mangini, A.: Late Quaternary fluctuations of biogenic component fluxes on
the continental slope of the Ross Sea, Antarctica, J. Marine
Syst., 17, 515–525, 1998.
Chadwick, M.: Southern Ocean surface sediment diatom abundances, in:
Mendeley Data, Mendeley Data [data set], https://doi.org/10.17632/2tnxcww6c8.1, 2020.
Chadwick, M. and Allen, C. S.: Marine Isotope Stage 5e diatom assemblages in
marine sediment core ANTA91-8 (−70.78 degN, 172.83 degE, Cruise ANTA91) – VERSION 2, NERC EDS UK Polar Data Centre [data set], https://doi.org/10.5285/BDA782A6-E89A-41A6-8791-F28001BC5D11, 2021a.
Chadwick, M. and Allen, C. S.: Marine Isotope Stage 5e diatom assemblages in
marine sediment core ELT17-9 (−63.08 degN, −135.12 degE, Cruise
ELT17), UK Polar Data Centre, Natural Environment Research Council, UK
Research & Innovation [data set], https://doi.org/10.5285/05DB2C67-99F0-4556-86BF-58B0E84F4CD7, 2021b.
Chadwick, M. and Allen, C. S.: Marine Isotope Stage 5e diatom assemblages in
marine sediment core MD03-2603 (−64.28 degN, 139.38 degE, Cruise
MD130), UK Polar Data Centre, Natural Environment Research Council, UK
Research & Innovation [data set], https://doi.org/10.5285/410F4E27-3214-466F-9DE3-E19848D8C5C2, 2021c.
Chadwick, M. and Allen, C. S.: Marine Isotope Stage 5e diatom assemblages in
marine sediment core NBP9802-04 (−64.20 degN, −170.08 degE, Cruise
PA9802), UK Polar Data Centre, Natural Environment Research Council, UK
Research & Innovation [data set], https://doi.org/10.5285/6106DABC-51AF-41C5-866C-CE8C9E401FD9, 2021d.
Chadwick, M. and Allen, C. S.: Marine Isotope Stage 5e diatom assemblages in
marine sediment core PC509 (−68.31 degN, −86.03 degE, Cruise JR179),
UK Polar Data Centre, Natural Environment Research Council, UK Research &
Innovation [data set], https://doi.org/10.5285/324137D3-CFC5-4CF6-A360-1A293A3E9ED6, 2021e.
Chadwick, M. and Allen, C. S.: Marine Isotope Stage 5e diatom assemblages in
marine sediment core TPC287 (−60.31 degN, −36.65 degE, Cruise JR48), UK
Polar Data Centre, Natural Environment Research Council, UK Research &
Innovation [data set], https://doi.org/10.5285/F8F7BBF7-BD86-45E5-BF22-F7FC327C94BF, 2021f.
Chadwick, M. and Allen, C. S.: Marine Isotope Stage 5e diatom assemblages in
marine sediment core TPC288 (−59.14 degN, −37.96 degE, Cruise JR48), UK
Polar Data Centre, Natural Environment Research Council, UK Research &
Innovation [data set], https://doi.org/10.5285/A1A6A674-823E-46F9-B345-6635A0E04220, 2021g.
Chadwick, M. and Allen, C. S.: Marine Isotope Stage 5e diatom assemblages in
marine sediment core TPC290 (−55.55 degN, −45.02 degE, Cruise JR48),
UK Polar Data Centre, Natural Environment Research Council, UK Research &
Innovation [data set], https://doi.org/10.5285/D7C00BEA-659A-426E-942F-821F6517C449, 2021h.
Chadwick, M. and Allen, C. S.: Marine Isotope Stage 5e diatom assemblages in
marine sediment core U1361A (−64.41 degN, 143.89 degE, IODP Exp. 318),
UK Polar Data Centre, Natural Environment Research Council, UK Research &
Innovation [data set], https://doi.org/10.5285/FE815073-28EE-462D-BEE3-09E0DA2F3866, 2021i.
Chadwick, M., Allen, C. S., Sime, L. C., and Hillenbrand, C. D.: Analysing
the timing of peak warming and minimum winter sea-ice extent in the Southern
Ocean during MIS 5e, Quaternary Sci. Rev., 229, 106134, https://doi.org/10.1016/j.quascirev.2019.106134, 2020.
Chadwick, M., Allen, C. S., and Crosta, X.: MIS 5e Southern Ocean September sea-ice concentrations and summer sea-surface temperatures reconstructed from marine sediment cores using a MAT diatom transfer function, PANGAEA [data set], https://doi.org/10.1594/PANGAEA.936573, 2021.
Chadwick, M., Allen, C. S., Sime, L. C., Crosta, X., and Hillenbrand, C.-D.:
How does the Southern Ocean palaeoenvironment during Marine Isotope Stage 5e
compare to the modern?, Mar. Micropaleontol., 170, 102066, https://doi.org/10.1016/j.marmicro.2021.102066, 2022.
Chase, Z., Anderson, R. F., Fleisher, M. Q., and Kubik, P. W.: Accumulation
of biogenic and lithogenic material in the Pacific sector of the Southern
Ocean during the past 40 000 years, Deep-Sea Res. Pt. II, 50, 799–832, 2003.
Cimino, M. A., Fraser, W. R., Irwin, A. J., and Oliver, M. J.: Satellite
data identify decadal trends in the quality of Pygoscelis penguin
chick-rearing habitat, Glob. Change Biol., 19, 136–148, 2013.
Civel-Mazens, M., Crosta, X., Cortese, G., Michel, E., Mazaud, A., Ther, O.,
Ikehara, M., and Itaki, T.: Antarctic Polar Front migrations in the
Kerguelen Plateau region, Southern Ocean, over the past 360 kyrs, Global
Planet. Change, 202, 103526, https://doi.org/10.1016/j.gloplacha.2021.103526, 2021.
Cremer, H., Roberts, D., McMinn, A., Gore, D., and Melles, M.: The Holocene
Diatom Flora of Marine Bays in the Windmill Islands, East Antarctica,
Bot. Mar., 46, 82–106, 2003.
Crosta, X., Pichon, J.-J., and Labracherie, M.: Distribution of
Chaetoceros resting spores in modern peri-Antarctic sediments, Mar. Micropaleontol., 29, 283–299, 1997.
Crosta, X., Pichon, J. J., and Burckle, L. H.: Application of modern analog
technique to marine Antarctic diatoms: Reconstruction of maximum sea-ice
extent at the Last Glacial Maximum, Paleoceanography, 13, 284–297, 1998.
Crosta, X., Sturm, A., Armand, L., and Pichon, J.-J.: Late Quaternary sea
ice history in the Indian sector of the Southern Ocean as recorded by diatom
assemblages, Mar. Micropaleontol., 50, 209–223, 2004.
Crosta, X., Romero, O., Armand, L. K., and Pichon, J.-J.: The biogeography
of major diatom taxa in Southern Ocean sediments: 2. Open ocean related
species, Palaeogeogr. Palaeocl., 223, 66–92,
2005.
CSIRO: State of the Climate, Bureau of Meteorology, Australia, 1–24 pp., ISBN 978-1-925315-97-4, 2018.
de Jong, J., Schoemann, V., Lannuzel, D., Croot, P., de Baar, H., and Tison,
J.-L.: Natural iron fertilization of the Atlantic sector of the Southern
Ocean by continental shelf sources of the Antarctic Peninsula, J.
Geophys. Res.-Biogeo., 117, G01029, https://doi.org/10.1029/2011JG001679, 2012.
Dotto, T. S., Naveira Garabato, A., Bacon, S., Tsamados, M., Holland, P. R.,
Hooley, J., Frajka-Williams, E., Ridout, A., and Meredith, M. P.:
Variability of the Ross Gyre, Southern Ocean: Drivers and Responses Revealed
by Satellite Altimetry, Geophys. Res. Lett., 45, 6195–6204, 2018.
Esper, O., Gersonde, R., and Kadagies, N.: Diatom distribution in
southeastern Pacific surface sediments and their relationship to modern
environmental variables, Palaeogeogr. Palaeocl.,
287, 1–27, 2010.
Ferreira, D., Marshall, J., Bitz, C. M., Solomon, S., and Plumb, A.:
Antarctic Ocean and Sea Ice Response to Ozone Depletion: A Two-Time-Scale
Problem, J. Climate, 28, 1206–1226, 2015.
Fetterer, F., Knowles, K., Meier, W. N., Savoie, M., and Windnagel, A. K.:
Sea Ice Index, Version 3. NSIDC: National Snow and Ice Data Center [data set], Boulder, Colorado, USA, https://doi.org/10.7265/N5K072F8, 2017.
Fischer, H., Meissner, K. J., Mix, A. C., Abram, N. J., Austermann, J.,
Brovkin, V., Capron, E., Colombaroli, D., Daniau, A.-L., Dyez, K. A., Felis,
T., Finkelstein, S. A., Jaccard, S. L., McClymont, E. L., Rovere, A.,
Sutter, J., Wolff, E. W., Affolter, S., Bakker, P., Ballesteros-Cánovas,
J. A., Barbante, C., Caley, T., Carlson, A. E., Churakova, O., Cortese, G.,
Cumming, B. F., Davis, B. A. S., de Vernal, A., Emile-Geay, J., Fritz, S.
C., Gierz, P., Gottschalk, J., Holloway, M. D., Joos, F., Kucera, M.,
Loutre, M.-F., Lunt, D. J., Marcisz, K., Marlon, J. R., Martinez, P.,
Masson-Delmotte, V., Nehrbass-Ahles, C., Otto-Bliesner, B. L., Raible, C.
C., Risebrobakken, B., Sánchez Goñi, M. F., Arrigo, J. S.,
Sarnthein, M., Sjolte, J., Stocker, T. F., Velasquez Alvárez, P. A.,
Tinner, W., Valdes, P. J., Vogel, H., Wanner, H., Yan, Q., Yu, Z., Ziegler,
M., and Zhou, L.: Palaeoclimate constraints on the impact of 2 ∘C
anthropogenic warming and beyond, Nat. Geosci., 11, 474–485, 2018.
Fogwill, C. J., Turney, C. S. M., Meissner, K. J., Golledge, N. R., Spence,
P., Roberts, J. L., England, M. H., Jones, R. T., and Carter, L.: Testing
the sensitivity of the East Antarctic Ice Sheet to Southern Ocean dynamics:
past changes and future implications, J. Quaternary Sci., 29,
91–98, 2014.
Gardner, A. S., Moholdt, G., Scambos, T., Fahnstock, M., Ligtenberg, S., van den Broeke, M., and Nilsson, J.: Increased West Antarctic and unchanged East Antarctic ice discharge over the last 7 years, The Cryosphere, 12, 521–547, https://doi.org/10.5194/tc-12-521-2018, 2018.
Gersonde, R. and Zielinski, U.: The reconstruction of late Quaternary
Antarctic sea-ice distribution – the use of diatoms as a proxy for sea-ice,
Palaeogeogr. Palaeocl., 162, 263–286, 2000.
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.
Ghadi, P., Nair, A., Crosta, X., Mohan, R., Manoj, M. C., and Meloth, T.:
Antarctic sea-ice and palaeoproductivity variation over the last
156 000 years in the Indian sector of Southern Ocean, Mar. Micropaleontol., 160, 101894, https://doi.org/10.1016/j.marmicro.2020.101894, 2020.
Goosse, H. and Zunz, V.: Decadal trends in the Antarctic sea ice extent ultimately controlled by ice–ocean feedback, The Cryosphere, 8, 453–470, https://doi.org/10.5194/tc-8-453-2014, 2014.
Govin, A., Michel, E., Labeyrie, L., Waelbroeck, C., Dewilde, F., and
Jansen, E.: Evidence for northward expansion of Antarctic Bottom Water mass
in the Southern Ocean during the last glacial inception, Paleoceanography,
24, PA1202, https://doi.org/10.1029/2008PA001603, 2009.
Govin, A., Braconnot, P., Capron, E., Cortijo, E., Duplessy, J.-C., Jansen, E., Labeyrie, L., Landais, A., Marti, O., Michel, E., Mosquet, E., Risebrobakken, B., Swingedouw, D., and Waelbroeck, C.: Persistent influence of ice sheet melting on high northern latitude climate during the early Last Interglacial, Clim. Past, 8, 483–507, https://doi.org/10.5194/cp-8-483-2012, 2012.
Govin, A., Capron, E., Tzedakis, P. C., Verheyden, S., Ghaleb, B.,
Hillaire-Marcel, C., St-Onge, G., Stoner, J. S., Bassinot, F., Bazin, L.,
Blunier, T., Combourieu-Nebout, N., El Ouahabi, A., Genty, D., Gersonde, R.,
Jimenez-Amat, P., Landais, A., Martrat, B., Masson-Delmotte, V., Parrenin,
F., Seidenkrantz, M. S., Veres, D., Waelbroeck, C., and Zahn, R.: Sequence
of events from the onset to the demise of the Last Interglacial: Evaluating
strengths and limitations of chronologies used in climatic archives,
Quaternary Sci. Rev., 129, 1–36, 2015.
Grobe, H., Mackensen, A., Hubberten, H.-W., Spiess, V., and Futterer, D. K.:
Stable isotope record and Late Quaternary sedimentation rates at the
Antarctic continental margin, in: Geological History of the Polar Oceans:
Arctic versus Antarctic, edited by: Bleil, U. and Thiede, H., NATO ASI Series C, 308, Kluwer Academic Publishers, Dordrecht, the Netherlands, https://doi.org/10.1007/978-94-009-2029-3_31, 1990.
Guiot, J. and de Vernal, A.: Is spatial autocorrelation introducing biases
in the apparent accuracy of paleoclimatic reconstructions?, Quaternary Sci. Rev., 30, 1965–1972, 2011.
Hall, A.: The Role of Surface Albedo Feedback in Climate, J. Climate, 17, 1550–1568, 2004.
Hellmer, H. H., Kauker, F., Timmermann, R., Determann, J., and Rae, J.:
Twenty-first-century warming of a large Antarctic ice-shelf cavity by a
redirected coastal current, Nature, 485, 225–228, 2012.
Hersbach, H., Bell, B., Berrisford, P., Biavati, G., Horanyi, A., Munoz
Sabater, J., Nicolas, J., Peubey, C., Radu, R., Rozum, I., Schepers, D.,
Simmons, A., Soci, C., Dee, D., and Thepaut, J.-N.: ERA5 monthly averaged
data on single levels from 1980 to 2019, Copernicus Climate Change Service
(C3S) Climate Data Store (CDS) [data set], https://doi.org/10.24381/cds.f17050d7, 2019.
Hill, S. L., Phillips, T., and Atkinson, A.: Potential Climate Change
Effects on the Habitat of Antarctic Krill in the Weddell Quadrant of the
Southern Ocean, PLoS One, 8, e72246, https://doi.org/10.1371/journal.pone.0072246, 2013.
Hobbs, W. R., Massom, R., Stammerjohn, S., Reid, P., Williams, G., and
Meier, W.: A review of recent changes in Southern Ocean sea ice, their
drivers and forcings, Global Planet. Change, 143, 228–250, 2016.
Holloway, M. D., Sime, L. C., Allen, C. S., Hillenbrand, C.-D., Bunch, P.,
Wolff, E., and Valdes, P. J.: The spatial structure of the 128 ka Antarctic
sea ice minimum, Geophys. Res. Lett., 44, 11129–11139, 2017.
Holloway, M. D., Sime, L. C., Singarayer, J. S., Tindall, J. C., and Valdes,
P. J.: Simulating the 128-ka Antarctic Climate Response to Northern
Hemisphere Ice Sheet Melting Using the Isotope-Enabled HadCM3, Geophys. Res. Lett., 45, 11921–11929, 2018.
IPCC: Summary for Policymakers, in: IPCC Special Report on the Ocean and
Cryosphere in a Changing Climate, edited by: Portner, H. O., Roberts, D. C.,
Masson-Delmotte, V., Zhai, P., Tignor, M., Poloczanska, E., Mintenbeck, K.,
Alegria, A., Nicolai, M., Okem, A., Petzold, J., Rama, B., and Weyers, N. M., in press, 2019.
Jenouvrier, S., Barbraud, C., and Weimerskirch, H.: Long-term contrasted
responses to climate of two Antarctic seabird species, Ecology, 86,
2889–2903, 2005.
Kang, S.-H. and Fryxell, G. A.: Fragilariopsis cylindrus (Grunow) Krieger: The most abundant diatom in water column assemblages of Antarctic marginal ice-edge zones, Polar Biol., 12, 609–627, 1992.
Kang, S.-H. and Fryxell, G. A.: Phytoplankton in the Weddell Sea,
Antarctica: composition, abundance and distribution in water-column
assemblages of the marginal ice-edge zone during austral autumn, Mar.
Biol., 116, 335–348, 1993.
Kang, S.-H., Fryxell, G. A., and Roelke, D. L.: Fragilariopsis cylindrus compared with other species of the diatom family Bacillariaceae in Antarctic marginal ice-edge zones, Nova Hedwigia, 106, 335–352, 1993.
Kim, S., Lee, J. I., McKay, R. M., Yoo, K.-C., Bak, Y.-S., Lee, M. K., Roh,
Y. H., Yoon, H. I., Moon, H. S., and Hyun, C.-U.: Late pleistocene
paleoceanographic changes in the Ross Sea – Glacial-interglacial variations
in paleoproductivity, nutrient utilization, and deep-water formation,
Quaternary Sci. Rev., 239, 106356, https://doi.org/10.1016/j.quascirev.2020.106356, 2020.
King, J.: A resolution of the Antarctic paradox, Nature, 505, 491–492, 2014.
Kopp, R. E., Simons, F. J., Mitrovica, J. X., Maloof, A. C., and
Oppenheimer, M.: Probabilistic assessment of sea level during the last
interglacial stage, Nature, 462, 863–867, 2009.
Kopp, R. E., Simons, F. J., Mitrovica, J. X., Maloof, A. C., and
Oppenheimer, M.: A probabilistic assessment of sea level variations within
the last interglacial stage, Geophys. J. Int., 193,
711–716, 2013.
Leventer, A.: Sediment trap diatom assemblages from the northern Antarctic
Peninsula region, Deep-Sea Res., 38, 1127–1143, 1991.
Lisiecki, L. E. and Raymo, M. E.: A Pliocene-Pleistocene stack of 57
globally distributed benthic δ18O records, Paleoceanography, 20,
PA1003, https://doi.org/10.1029/2004PA001071, 2005.
Liu, J. and Curry, J. A.: Accelerated warming of the Southern Ocean and its
impacts on the hydrological cycle and sea ice, Proc. Natl. Acad. Sci. USA, 107, 14987–14992, 2010.
Locarnini, R. A., Mishonov, A. V., Antonov, J. I., Boyer, T. P., Garcia, H.
E., Baranova, O. K., Zweng, M. M., Paver, C. R., Reagan, J. R., Johnson, D.
R., Hamilton, M., and Seidov, D.: World Ocean atlas 2013, volume 1:
Temperature, https://doi.org/10.7289/V55X26VD, 2013.
Maksym, T.: Arctic and Antarctic Sea Ice Change: Contrasts, Commonalities,
and Causes, Annu. Rev. Mar. Sci., 11, 187–213, 2019.
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, 2019.
Massom, R. A., Scambos, T. A., Bennetts, L. G., Reid, P., Squire, V. A., and
Stammerjohn, S. E.: Antarctic ice shelf disintegration triggered by sea ice
loss and ocean swell, Nature, 558, 383–389, 2018.
Mendes, C. R. B., Tavano, V. M., Dotto, T. S., Kerr, R., de Souza, M. S.,
Garcia, C. A. E., and Secchi, E. R.: New insights on the dominance of
cryptophytes in Antarctic coastal waters: A case study in Gerlache Strait,
Deep-Sea Res. Pt. II, 149, 161–170,
2018.
Menviel, L., Timmermann, A., Timm, O. E., and Mouchet, A.: Climate and
biogeochemical response to a rapid melting of the West Antarctic Ice Sheet
during interglacials and implications for future climate, Paleoceanography,
25, PA4231, https://doi.org/10.1029/2009PA001892, 2010.
Meredith, M., Sommerkorn, M., Cassotta, S., Derksen, C., Ekaykin, A.,
Hollowed, A., Kofinas, G., Mackintosh, A., Melbourne-Thomas, J., Muelbert,
M. M. C., Ottersen, G., Pritchard, H., and Schuur, E. A. G.: Polar Regions, in: IPCC Special Report on the Ocean and Cryosphere in a Changing Climate, edited by: Portner, H. O., Roberts, D. C., Masson-Delmotte, V., Zhai, P., Tignor, M., Poloczanska, E., Mintenbeck, K., Alegria, A., Nicolai, M., Okem, A., Petzold, J., Rama, B., and Weyers, N. M., in press, 2019.
Merino, N., Le Sommer, J., Durand, G., Jourdain, N. C., Madec, G., Mathiot,
P., and Tournadre, J.: Antarctic icebergs melt over the Southern Ocean:
Climatology and impact on sea ice, Ocean Model., 104, 99–110, 2016.
Merino, N., Jourdain, N. C., Le Sommer, J., Goosse, H., Mathiot, P., and
Durand, G.: Impact of increasing antarctic glacial freshwater release on
regional sea-ice cover in the Southern Ocean, Ocean Model., 121, 76–89,
2018.
Moline, M. A., Claustre, H., Frazer, T. K., Schofield, O., and Vernet, M.:
Alteration of the food web along the Antarctic Peninsula in response to a
regional warming trend, Glob. Change Biol., 10, 1973–1980, 2004.
Mulvaney, R., Abram, N. J., Hindmarsh, R. C., Arrowsmith, C., Fleet, L.,
Triest, J., Sime, L. C., Alemany, O., and Foord, S.: Recent Antarctic
Peninsula warming relative to Holocene climate and ice-shelf history,
Nature, 489, 141–144, 2012.
Nair, A., Mohan, R., Crosta, X., Manoj, M. C., Thamban, M., and Marieu, V.:
Southern Ocean sea ice and frontal changes during the Late Quaternary and
their linkages to Asian summer monsoon, Quaternary Sci. Rev., 213,
93–104, 2019.
Nghiem, S. V., Rigor, I. G., Clemente-Colón, P., Neumann, G., and Li, P.
P.: Geophysical constraints on the Antarctic sea ice cover, Remote Sens. Environ., 181, 281–292, 2016.
Paillard, D., Labeyrie, L., and Yiou, P.: Macintosh program performs
time-series analysis, Eos, 77, 379–379, https://doi.org/10.1029/96EO00259, 1996.
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,
Proc. Natl. Acad. Sci. USA, 116, 14414–14423, 2019.
Parrenin, F., Masson-Delmotte, V., Kohler, P., Raynaud, D., Paillard, D.,
Schwander, J., Barbante, C., Landais, A., Wegner, A., and Jouzel, J.:
Antarctic Temperature Stack (ATS) from five different ice cores (EDC,
Vostok, Dome Fuji, TALDICE, and EDML), PANGAEA [data set], https://doi.org/10.1594/PANGAEA.810188, 2013a.
Parrenin, F., Masson-Delmotte, V., Kohler, P., Raynaud, D., Paillard, D.,
Schwander, J., Barbante, C., Landais, A., Wegner, A., and Jouzel, J.:
Synchronisation of the LR04 stack with EDC isotopic variations on the EDC3
age scale, PANGAEA [data set], https://doi.org/10.1594/PANGAEA.810271, 2013b.
Presti, M., Barbara, L., Denis, D., Schmidt, S., De Santis, L., and Crosta,
X.: Sediment delivery and depositional patterns off Adélie Land (East
Antarctica) in relation to late Quaternary climatic cycles, Mar. Geol.,
284, 96–113, 2011.
Pugh, R. S., McCave, I. N., Hillenbrand, C. D., and Kuhn, G.:
Circum-Antarctic age modelling of Quaternary marine cores under the
Antarctic Circumpolar Current: Ice-core dust–magnetic correlation, Earth
Planet. Sc. Lett., 284, 113–123, 2009.
Purich, A., England, M. H., Cai, W., Chikamoto, Y., Timmermann, A., Fyfe, J.
C., Frankcombe, L., Meehl, G. A., and Arblaster, J. M.: Tropical Pacific SST
Drivers of Recent Antarctic Sea Ice Trends, J. Climate, 29,
8931–8948, 2016.
Rignot, E., Mouginot, J., Scheuchl, B., van den Broeke, M., van Wessem, M.
J., and Morlighem, M.: Four decades of Antarctic Ice Sheet mass balance from
1979-2017, Proc. Natl. Acad. Sci. USA, 116, 1095–1103, 2019.
Rintoul, S. R.: The global influence of localized dynamics in the Southern
Ocean, Nature, 558, 209–218, 2018.
Romero, O. E., Armand, L. K., Crosta, X., and Pichon, J. J.: The
biogeography of major diatom taxa in Southern Ocean surface sediments: 3.
Tropical/Subtropical species, Palaeogeogr. Palaeocl., 223, 49–65, 2005.
Rosenblum, E. and Eisenman, I.: Sea Ice Trends in Climate Models Only
Accurate in Runs with Biased Global Warming, J. Climate, 30,
6265–6278, 2017.
Rysgaard, S., Bendtsen, J., Delille, B., Dieckmann, G. S., Glud, R. N.,
Kennedy, H., Mortensen, J., Papadimitriou, S., Thomas, D. N., and Tison,
J.-L.: Sea ice contribution to the air–sea CO2 exchange in the Arctic and Southern Oceans, Tellus B, 63, 823–830,
2011.
Saunders, K. M., Kamenik, C., Hodgson, D. A., Hunziker, S., Siffert, L.,
Fischer, D., Fujak, M., Gibson, J. A. E., and Grosjean, M.: Late Holocene
changes in precipitation in northwest Tasmania and their potential links to
shifts in the Southern Hemisphere westerly winds, Global Planet.
Change, 92–93, 82–91, 2012.
Scherer, R. P.: A new method for the determination of absolute abundance of
diatoms and other silt-sized sedimentary particles, J. Paleolimnol., 12, 171–179, 1994.
Schweitzer, P. N.: Monthly average polar sea-ice concentration 1978 through
1991, in: U.S. Geological Survey Digital Data Series DDS-27, U.S. Geological
Survey, Reston, Virginia, https://doi.org/10.3133/ds27, 1995.
Shemesh, A., Hodell, D., Crosta, X., Kanfoush, S., Charles, C., and
Guilderson, T.: Sequence of events during the last deglaciation in Southern
Ocean sediments and Antarctic ice cores, Paleoceanography, 17, 8-1–8-7,
2002.
Shukla, S. K., Crosta, X., and Ikehara, M.: Sea Surface Temperatures in the
Indian Sub-Antarctic Southern Ocean for the Last Four Interglacial Periods,
Geophys. Res. Lett., 48, e2020GL090994, https://doi.org/10.1029/2020GL090994, 2021.
Siegel, V. and Watkins, J. L.: Distribution, Biomass and Demography of
Antarctic Krill, Euphausia superba, in: Biology and Ecology of Antarctic krill, edited by: Siegel, V., Advances in Polar Ecology, Springer, https://doi.org/10.1007/978-3-319-29279-3_2, 2016.
Sime, L. C., Carlson, A. E., and Holloway, M. D.: On recovering Last
Interglacial changes in the Antarctic ice sheet, Past Global Changes
Magazine, 27, 14–15, 2019.
Simpson, G.: Analogue Methods in Palaeoecology: Using the analogue Package,
J. Stat. Softw., 22, 1–29, https://doi.org/10.18637/jss.v022.i02, 2007.
Stammerjohn, S. E., Martinson, D. G., Smith, R. C., Yuan, X., and Rind, D.:
Trends in Antarctic annual sea ice retreat and advance and their relation to
El Niño–Southern Oscillation and Southern Annular Mode variability,
J. Geophys. Res., 113, C03S90, https://doi.org/10.1029/2007JC004269, 2008.
Stone, E. J., Capron, E., Lunt, D. J., Payne, A. J., Singarayer, J. S., Valdes, P. J., and Wolff, E. W.: Impact of meltwater on high-latitude early Last Interglacial climate, Clim. Past, 12, 1919–1932, https://doi.org/10.5194/cp-12-1919-2016, 2016.
Tamsitt, V., Drake, H. F., Morrison, A. K., Talley, L. D., Dufour, C. O.,
Gray, A. R., Griffies, S. M., Mazloff, M. R., Sarmiento, J. L., Wang, J.,
and Weijer, W.: Spiraling pathways of global deep waters to the surface of
the Southern Ocean, Nat. Commun., 8, 172, https://doi.org/10.1038/s41467-017-00197-0, 2017.
Thomas, E. R., Allen, C. S., Etourneau, J., King, A. C. F., Severi, M.,
Winton, V. H. L., Mueller, J., Crosta, X., and Peck, V. L.: Antarctic Sea
Ice Proxies from Marine and Ice Core Archives Suitable for Reconstructing
Sea Ice over the Past 2000 Years, Geosciences, 9, 506, https://doi.org/10.3390/geosciences9120506, 2019.
Trathan, P. N., Brandon, M. A., Murphy, E. J., and Thorpe, S. E.: Transport
and structure within the Antarctic Circumpolar Current to the north of South
Georgia, Geophys. Res. Lett., 27, 1727–1730, 2000.
Turney, C. S. M., Fogwill, C. J., Golledge, N. R., McKay, N. P., van
Sebille, E., Jones, R. T., Etheridge, D., Rubino, M., Thornton, D. P.,
Davies, S. M., Ramsey, C. B., Thomas, Z. A., Bird, M. I., Munksgaard, N. C.,
Kohno, M., Woodward, J., Winter, K., Weyrich, L. S., Rootes, C. M., Millman,
H., Albert, P. G., Rivera, A., van Ommen, T., Curran, M., Moy, A.,
Rahmstorf, S., Kawamura, K., Hillenbrand, C. D., Weber, M. E., Manning, C.
J., Young, J., and Cooper, A.: Early Last Interglacial ocean warming drove
substantial ice mass loss from Antarctica, Proc. Natl. Acad. Sci. USA, 117,
3996–4006, 2020.
Veres, D., Bazin, L., Landais, A., Toyé Mahamadou Kele, H., Lemieux-Dudon, B., Parrenin, F., Martinerie, P., Blayo, E., Blunier, T., Capron, E., Chappellaz, J., Rasmussen, S. O., Severi, M., Svensson, A., Vinther, B., and Wolff, E. W.: The Antarctic ice core chronology (AICC2012): an optimized multi-parameter and multi-site dating approach for the last 120 thousand years, Clim. Past, 9, 1733–1748, https://doi.org/10.5194/cp-9-1733-2013, 2013.
Vernet, M., Geibert, W., Hoppema, M., Brown, P. J., Haas, C., Hellmer, H.
H., Jokat, W., Jullion, L., Mazloff, M., Bakker, D. C. E., Brearley, J. A.,
Croot, P., Hattermann, T., Hauck, J., Hillenbrand, C. D., Hoppe, C. J. M.,
Huhn, O., Koch, B. P., Lechtenfeld, O. J., Meredith, M. P., Naveira
Garabato, A. C., Nöthig, E. M., Peeken, I., Rutgers van der Loeff, M.
M., Schmidtko, S., Schröder, M., Strass, V. H., Torres-Valdés, S.,
and Verdy, A.: The Weddell Gyre, Southern Ocean: Present Knowledge and
Future Challenges, Rev. Geophys., 57, 623–708, 2019.
von Quillfeldt, C.: The diatom Fragilariopsis cylindrus and its potential as an indicator species for cold water rather than for sea ice, Vie et Milieu/Life & Environment,
54, 137–143, 2004.
Wahlin, A. K., Graham, A. G. C., Hogan, K. A., Queste, B. Y., Boehme, L.,
Larter, R. D., Pettit, E. C., Wellner, J., and Heywood, K. J.: Pathways and
modification of warm water flowing beneath Thwaites Ice Shelf, West
Antarctica, Sci. Adv., 7, eabd7254, https://doi.org/10.1126/sciadv.abd7254, 2021.
Walter, H. J., Hegner, E., Diekmann, B., Kuhn, G., and Rutgers van der
Loeff, M. M.: Provenance and transport of terrigenous sediment in the South
Atlantic Ocean and their relations to glacial and interglacial cycles: Nd
and Sr isotopic evidence, Geochim. Cosmochim. Ac., 64, 3813–3827,
2000.
Warnock, J. P., Scherer, R. P., and Konfirst, M. A.: A record of Pleistocene
diatom preservation from the Amundsen Sea, West Antarctica with possible
implications on silica leakage, Mar. Micropaleontol., 117, 40–46, 2015.
Weber, M. E., Clark, P. U., Kuhn, G., Timmermann, A., Sprenk, D., Gladstone,
R., Zhang, X., Lohmann, G., Menviel, L., Chikamoto, M. O., Friedrich, T.,
and Ohlwein, C.: Millennial-scale variability in Antarctic ice-sheet
discharge during the last deglaciation, Nature, 510, 134–138, 2014.
Williams, T. J.: Investigating the circulation of Southern Ocean deep water
masses over the last 1.5 million years by geochemical fingerprinting of
marine sediments, PhD, Department of Earth Sciences, University of
Cambridge, 213 pp., https://doi.org/10.17863/CAM.21086, 2018.
Wilson, D. J., Bertram, R. A., Needham, E. F., van de Flierdt, T., Welsh, K.
J., McKay, R. M., Mazumder, A., Riesselman, C. R., Jimenez-Espejo, F. J.,
and Escutia, C.: Ice loss from the East Antarctic Ice Sheet during late
Pleistocene interglacials, Nature, 561, 383–386, 2018.
Wolff, E. W., Fischer, H., Fundel, F., Ruth, U., Twarloh, B., Littot, G. C.,
Mulvaney, R., Rothlisberger, R., de Angelis, M., Boutron, C. F., Hansson,
M., Jonsell, U., Hutterli, M. A., Lambert, F., Kaufmann, P., Stauffer, B.,
Stocker, T. F., Steffensen, J. P., Bigler, M., Siggaard-Andersen, M. L.,
Udisti, R., Becagli, S., Castellano, E., Severi, M., Wagenbach, D.,
Barbante, C., Gabrielli, P., and Gaspari, V.: Southern Ocean sea-ice extent,
productivity and iron flux over the past eight glacial cycles, Nature, 440,
491–496, 2006.
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, 2016.
Zielinski, U.: Quantitative estimation of palaeoenvironmental parameters of
the Antarctic Surface Water in the Late Quaternary using transfer functions
with diatoms, Alfred Wegener Institute for Polar and Marine Research,
Bremerhaven, https://doi.org/10013/epic.10127.d001, 1993.
Zielinski, U. and Gersonde, R.: Diatom distribution in Southern Ocean
surface sediments (Atlantic sector): Implications for paleoenvironmental
reconstructions, Palaeogeogr. Palaeocl., 129,
213–250, 1997.
Zielinski, U., Bianchi, C., Gersonde, R., and Kunz-Pirrung, M.: Last
occurrence datums of the diatoms Rouxia leventerae and Rouxia constricta: indicators for marine isotope stages
6 and 8 in Southern Ocean sediments, Mar. Micropaleontol., 46, 127–137,
2002.
Zwally, H. J., Comiso, J. C., Parkinson, C. L., Cavalieri, D. J., and
Gloersen, P.: Variability of Antarctic sea ice 1979–1998, J. Geophys. Res., 107, 3041, https://doi.org/10.1029/2000JC000733, 2002.
Short summary
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.
Algae preserved in marine sediments have allowed us to reconstruct how much winter sea ice was...
