Constraining the contribution of the Antarctic Ice Sheet to Last Interglacial sea level-Reference-Cited by-同舟云学术

Constraining the contribution of the Antarctic Ice Sheet to Last Interglacial sea level

Published:2023-07-07 Issue:27 Volume:9 Page:
ISSN:2375-2548
Container-title:Science Advances
language:en
Short-container-title:Sci. Adv.

Author:

Barnett Robert L.¹²^ORCID,Austermann Jacqueline³,Dyer Blake⁴^ORCID,Telfer Matt W.⁵^ORCID,Barlow Natasha L. M.⁶^ORCID,Boulton Sarah J.⁵^ORCID,Carr Andrew S.⁷,Creel Roger C.³^ORCID

Affiliation:

1. Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, UK.

2. Département de biologie, chimie et géographie et Centre d’études nordiques, Université du Québec à Rimouski, Rimouski, QC, Canada.

3. Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, USA.

4. School of Earth and Ocean Sciences, University of Victoria, Victoria, BC, Canada.

5. School of Geography, Earth and Environmental Sciences, University of Plymouth, Plymouth, UK.

6. School of Earth and Environment, University of Leeds, Leeds, UK.

7. School of Geography, Geology and the Environment, University of Leicester, Leicester, UK.

Abstract

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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Link

https://www.science.org/doi/pdf/10.1126/sciadv.adf0198

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