Constraining the contribution of the Antarctic Ice Sheet to Last Interglacial sea level
Polar temperatures during the Last Interglacial [LIG; ~129 to 116 thousand years (ka)] were warmer than today, making this time period an important testing ground to better understand how ice sheets respond to warming. However, it remains debated how much and when the Antarctic and Greenland ice she...
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craaas:10.1126/sciadv.adf0198 2024-09-30T14:24:46+00:00 Constraining the contribution of the Antarctic Ice Sheet to Last Interglacial sea level Barnett, Robert L. Austermann, Jacqueline Dyer, Blake Telfer, Matt W. Barlow, Natasha L. M. Boulton, Sarah J. Carr, Andrew S. Creel, Roger C. 2023 http://dx.doi.org/10.1126/sciadv.adf0198 https://www.science.org/doi/pdf/10.1126/sciadv.adf0198 en eng American Association for the Advancement of Science (AAAS) Science Advances volume 9, issue 27 ISSN 2375-2548 journal-article 2023 craaas https://doi.org/10.1126/sciadv.adf0198 2024-09-19T04:01:01Z Polar temperatures during the Last Interglacial [LIG; ~129 to 116 thousand years (ka)] were warmer than today, making this time period an important testing ground to better understand how ice sheets respond to warming. However, it remains debated how much and when the Antarctic and Greenland ice sheets changed during this period. Here, we present a combination of new and existing absolutely dated LIG sea-level observations from Britain, France, and Denmark. Because of glacial isostatic adjustment (GIA), the LIG Greenland ice melt contribution to sea-level change in this region is small, which allows us to constrain Antarctic ice change. We find that the Antarctic contribution to LIG global mean sea level peaked early in the interglacial (before 126 ka), with a maximum contribution of 5.7 m (50th percentile, 3.6 to 8.7 m central 68% probability) before declining. Our results support an asynchronous melt history over the LIG, with an early Antarctic contribution followed by later Greenland Ice Sheet mass loss. Article in Journal/Newspaper Antarc* Antarctic Greenland Ice Sheet AAAS Resource Center (American Association for the Advancement of Science) Antarctic Greenland The Antarctic Science Advances 9 27 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
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English |
description |
Polar temperatures during the Last Interglacial [LIG; ~129 to 116 thousand years (ka)] were warmer than today, making this time period an important testing ground to better understand how ice sheets respond to warming. However, it remains debated how much and when the Antarctic and Greenland ice sheets changed during this period. Here, we present a combination of new and existing absolutely dated LIG sea-level observations from Britain, France, and Denmark. Because of glacial isostatic adjustment (GIA), the LIG Greenland ice melt contribution to sea-level change in this region is small, which allows us to constrain Antarctic ice change. We find that the Antarctic contribution to LIG global mean sea level peaked early in the interglacial (before 126 ka), with a maximum contribution of 5.7 m (50th percentile, 3.6 to 8.7 m central 68% probability) before declining. Our results support an asynchronous melt history over the LIG, with an early Antarctic contribution followed by later Greenland Ice Sheet mass loss. |
format |
Article in Journal/Newspaper |
author |
Barnett, Robert L. Austermann, Jacqueline Dyer, Blake Telfer, Matt W. Barlow, Natasha L. M. Boulton, Sarah J. Carr, Andrew S. Creel, Roger C. |
spellingShingle |
Barnett, Robert L. Austermann, Jacqueline Dyer, Blake Telfer, Matt W. Barlow, Natasha L. M. Boulton, Sarah J. Carr, Andrew S. Creel, Roger C. Constraining the contribution of the Antarctic Ice Sheet to Last Interglacial sea level |
author_facet |
Barnett, Robert L. Austermann, Jacqueline Dyer, Blake Telfer, Matt W. Barlow, Natasha L. M. Boulton, Sarah J. Carr, Andrew S. Creel, Roger C. |
author_sort |
Barnett, Robert L. |
title |
Constraining the contribution of the Antarctic Ice Sheet to Last Interglacial sea level |
title_short |
Constraining the contribution of the Antarctic Ice Sheet to Last Interglacial sea level |
title_full |
Constraining the contribution of the Antarctic Ice Sheet to Last Interglacial sea level |
title_fullStr |
Constraining the contribution of the Antarctic Ice Sheet to Last Interglacial sea level |
title_full_unstemmed |
Constraining the contribution of the Antarctic Ice Sheet to Last Interglacial sea level |
title_sort |
constraining the contribution of the antarctic ice sheet to last interglacial sea level |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1126/sciadv.adf0198 https://www.science.org/doi/pdf/10.1126/sciadv.adf0198 |
geographic |
Antarctic Greenland The Antarctic |
geographic_facet |
Antarctic Greenland The Antarctic |
genre |
Antarc* Antarctic Greenland Ice Sheet |
genre_facet |
Antarc* Antarctic Greenland Ice Sheet |
op_source |
Science Advances volume 9, issue 27 ISSN 2375-2548 |
op_doi |
https://doi.org/10.1126/sciadv.adf0198 |
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Science Advances |
container_volume |
9 |
container_issue |
27 |
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1811642232812339200 |