Early sea ice decline off East Antarctica at the last glacial–interglacial climate transition
Antarctic climate warming and atmospheric CO(2) rise during the last deglaciation may be attributed in part to sea ice reduction in the Southern Ocean. Yet, glacial–interglacial Antarctic sea ice dynamics and underlying mechanisms are poorly constrained, as robust sea ice proxy evidence is sparse. H...
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ftpubmed:oai:pubmedcentral.nih.gov:10569715 2023-11-12T04:06:12+01:00 Early sea ice decline off East Antarctica at the last glacial–interglacial climate transition Sadatzki, Henrik Opdyke, Bradley Menviel, Laurie Leventer, Amy Hope, Janet M. Brocks, Jochen J. Fallon, Stewart Post, Alexandra L. O’Brien, Philip E. Grant, Katharine Armand, Leanne 2023-10-12 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10569715/ https://doi.org/10.1126/sciadv.adh9513 en eng American Association for the Advancement of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10569715/ http://dx.doi.org/10.1126/sciadv.adh9513 Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. Sci Adv Earth Environmental Ecological and Space Sciences Text 2023 ftpubmed https://doi.org/10.1126/sciadv.adh9513 2023-10-15T01:11:16Z Antarctic climate warming and atmospheric CO(2) rise during the last deglaciation may be attributed in part to sea ice reduction in the Southern Ocean. Yet, glacial–interglacial Antarctic sea ice dynamics and underlying mechanisms are poorly constrained, as robust sea ice proxy evidence is sparse. Here, we present a molecular biomarker-based sea ice record that resolves the spring/summer sea ice variability off East Antarctica during the past 40 thousand years (ka). Our results indicate that substantial sea ice reduction culminated rapidly and contemporaneously with upwelling of carbon-enriched waters in the Southern Ocean at the onset of the last deglaciation but began at least ~2 ka earlier probably driven by an increasing local integrated summer insolation. Our findings suggest that sea ice reduction and associated feedbacks facilitated stratification breakup and outgassing of CO(2) in the Southern Ocean and warming in Antarctica but may also have played a leading role in initializing these deglacial processes in the Southern Hemisphere. Text Antarc* Antarctic Antarctica East Antarctica Sea ice Southern Ocean PubMed Central (PMC) Antarctic Southern Ocean East Antarctica Science Advances 9 41 |
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Open Polar |
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PubMed Central (PMC) |
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ftpubmed |
language |
English |
topic |
Earth Environmental Ecological and Space Sciences |
spellingShingle |
Earth Environmental Ecological and Space Sciences Sadatzki, Henrik Opdyke, Bradley Menviel, Laurie Leventer, Amy Hope, Janet M. Brocks, Jochen J. Fallon, Stewart Post, Alexandra L. O’Brien, Philip E. Grant, Katharine Armand, Leanne Early sea ice decline off East Antarctica at the last glacial–interglacial climate transition |
topic_facet |
Earth Environmental Ecological and Space Sciences |
description |
Antarctic climate warming and atmospheric CO(2) rise during the last deglaciation may be attributed in part to sea ice reduction in the Southern Ocean. Yet, glacial–interglacial Antarctic sea ice dynamics and underlying mechanisms are poorly constrained, as robust sea ice proxy evidence is sparse. Here, we present a molecular biomarker-based sea ice record that resolves the spring/summer sea ice variability off East Antarctica during the past 40 thousand years (ka). Our results indicate that substantial sea ice reduction culminated rapidly and contemporaneously with upwelling of carbon-enriched waters in the Southern Ocean at the onset of the last deglaciation but began at least ~2 ka earlier probably driven by an increasing local integrated summer insolation. Our findings suggest that sea ice reduction and associated feedbacks facilitated stratification breakup and outgassing of CO(2) in the Southern Ocean and warming in Antarctica but may also have played a leading role in initializing these deglacial processes in the Southern Hemisphere. |
format |
Text |
author |
Sadatzki, Henrik Opdyke, Bradley Menviel, Laurie Leventer, Amy Hope, Janet M. Brocks, Jochen J. Fallon, Stewart Post, Alexandra L. O’Brien, Philip E. Grant, Katharine Armand, Leanne |
author_facet |
Sadatzki, Henrik Opdyke, Bradley Menviel, Laurie Leventer, Amy Hope, Janet M. Brocks, Jochen J. Fallon, Stewart Post, Alexandra L. O’Brien, Philip E. Grant, Katharine Armand, Leanne |
author_sort |
Sadatzki, Henrik |
title |
Early sea ice decline off East Antarctica at the last glacial–interglacial climate transition |
title_short |
Early sea ice decline off East Antarctica at the last glacial–interglacial climate transition |
title_full |
Early sea ice decline off East Antarctica at the last glacial–interglacial climate transition |
title_fullStr |
Early sea ice decline off East Antarctica at the last glacial–interglacial climate transition |
title_full_unstemmed |
Early sea ice decline off East Antarctica at the last glacial–interglacial climate transition |
title_sort |
early sea ice decline off east antarctica at the last glacial–interglacial climate transition |
publisher |
American Association for the Advancement of Science |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10569715/ https://doi.org/10.1126/sciadv.adh9513 |
geographic |
Antarctic Southern Ocean East Antarctica |
geographic_facet |
Antarctic Southern Ocean East Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Sea ice Southern Ocean |
op_source |
Sci Adv |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10569715/ http://dx.doi.org/10.1126/sciadv.adh9513 |
op_rights |
Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
op_doi |
https://doi.org/10.1126/sciadv.adh9513 |
container_title |
Science Advances |
container_volume |
9 |
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41 |
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1782327300289724416 |