Genomic evidence for West Antarctic Ice Sheet collapse during the Last Interglacial
The marine-based West Antarctic Ice Sheet (WAIS) is considered vulnerable to irreversible collapse under future climate trajectories, and its tipping point may lie within the mitigated warming scenarios of 1.5° to 2°C of the United Nations Paris Agreement. Knowledge of ice loss during similarly warm...
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American Association for the Advancement of Science (AAAS)
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Online Access: | http://dx.doi.org/10.1126/science.ade0664 https://www.science.org/doi/pdf/10.1126/science.ade0664 |
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craaas:10.1126/science.ade0664 2024-09-30T14:26:42+00:00 Genomic evidence for West Antarctic Ice Sheet collapse during the Last Interglacial Lau, Sally C. Y. Wilson, Nerida G. Golledge, Nicholas R. Naish, Tim R. Watts, Phillip C. Silva, Catarina N. S. Cooke, Ira R. Allcock, A. Louise Mark, Felix C. Linse, Katrin Strugnell, Jan M. 2023 http://dx.doi.org/10.1126/science.ade0664 https://www.science.org/doi/pdf/10.1126/science.ade0664 en eng American Association for the Advancement of Science (AAAS) Science volume 382, issue 6677, page 1384-1389 ISSN 0036-8075 1095-9203 journal-article 2023 craaas https://doi.org/10.1126/science.ade0664 2024-09-19T04:01:16Z The marine-based West Antarctic Ice Sheet (WAIS) is considered vulnerable to irreversible collapse under future climate trajectories, and its tipping point may lie within the mitigated warming scenarios of 1.5° to 2°C of the United Nations Paris Agreement. Knowledge of ice loss during similarly warm past climates could resolve this uncertainty, including the Last Interglacial when global sea levels were 5 to 10 meters higher than today and global average temperatures were 0.5° to 1.5°C warmer than preindustrial levels. Using a panel of genome-wide, single-nucleotide polymorphisms of a circum-Antarctic octopus, we show persistent, historic signals of gene flow only possible with complete WAIS collapse. Our results provide the first empirical evidence that the tipping point of WAIS loss could be reached even under stringent climate mitigation scenarios. Article in Journal/Newspaper Antarc* Antarctic Antarctic Octopus Ice Sheet AAAS Resource Center (American Association for the Advancement of Science) Antarctic West Antarctic Ice Sheet Science 382 6677 1384 1389 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
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craaas |
language |
English |
description |
The marine-based West Antarctic Ice Sheet (WAIS) is considered vulnerable to irreversible collapse under future climate trajectories, and its tipping point may lie within the mitigated warming scenarios of 1.5° to 2°C of the United Nations Paris Agreement. Knowledge of ice loss during similarly warm past climates could resolve this uncertainty, including the Last Interglacial when global sea levels were 5 to 10 meters higher than today and global average temperatures were 0.5° to 1.5°C warmer than preindustrial levels. Using a panel of genome-wide, single-nucleotide polymorphisms of a circum-Antarctic octopus, we show persistent, historic signals of gene flow only possible with complete WAIS collapse. Our results provide the first empirical evidence that the tipping point of WAIS loss could be reached even under stringent climate mitigation scenarios. |
format |
Article in Journal/Newspaper |
author |
Lau, Sally C. Y. Wilson, Nerida G. Golledge, Nicholas R. Naish, Tim R. Watts, Phillip C. Silva, Catarina N. S. Cooke, Ira R. Allcock, A. Louise Mark, Felix C. Linse, Katrin Strugnell, Jan M. |
spellingShingle |
Lau, Sally C. Y. Wilson, Nerida G. Golledge, Nicholas R. Naish, Tim R. Watts, Phillip C. Silva, Catarina N. S. Cooke, Ira R. Allcock, A. Louise Mark, Felix C. Linse, Katrin Strugnell, Jan M. Genomic evidence for West Antarctic Ice Sheet collapse during the Last Interglacial |
author_facet |
Lau, Sally C. Y. Wilson, Nerida G. Golledge, Nicholas R. Naish, Tim R. Watts, Phillip C. Silva, Catarina N. S. Cooke, Ira R. Allcock, A. Louise Mark, Felix C. Linse, Katrin Strugnell, Jan M. |
author_sort |
Lau, Sally C. Y. |
title |
Genomic evidence for West Antarctic Ice Sheet collapse during the Last Interglacial |
title_short |
Genomic evidence for West Antarctic Ice Sheet collapse during the Last Interglacial |
title_full |
Genomic evidence for West Antarctic Ice Sheet collapse during the Last Interglacial |
title_fullStr |
Genomic evidence for West Antarctic Ice Sheet collapse during the Last Interglacial |
title_full_unstemmed |
Genomic evidence for West Antarctic Ice Sheet collapse during the Last Interglacial |
title_sort |
genomic evidence for west antarctic ice sheet collapse during the last interglacial |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1126/science.ade0664 https://www.science.org/doi/pdf/10.1126/science.ade0664 |
geographic |
Antarctic West Antarctic Ice Sheet |
geographic_facet |
Antarctic West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Antarctic Octopus Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctic Octopus Ice Sheet |
op_source |
Science volume 382, issue 6677, page 1384-1389 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.ade0664 |
container_title |
Science |
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382 |
container_issue |
6677 |
container_start_page |
1384 |
op_container_end_page |
1389 |
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1811632832044335104 |