Genomic evidence for West Antarctic Ice Sheet collapse during the Last Interglacial-Reference-Cited by-同舟云学术

Genomic evidence for West Antarctic Ice Sheet collapse during the Last Interglacial

Published:2023-12-22 Issue:6677 Volume:382 Page:1384-1389
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Lau Sally C. Y.¹²^ORCID,Wilson Nerida G.³⁴⁵,Golledge Nicholas R.⁶^ORCID,Naish Tim R.⁶^ORCID,Watts Phillip C.⁷^ORCID,Silva Catarina N. S.¹⁸^ORCID,Cooke Ira R.⁹^ORCID,Allcock A. Louise¹⁰^ORCID,Mark Felix C.¹¹^ORCID,Linse Katrin¹²^ORCID,Strugnell Jan M.¹²^ORCID

Affiliation:

1. Centre for Sustainable Tropical Fisheries and Aquaculture and College of Science and Engineering, James Cook University, Townsville, Qld, Australia.

2. Securing Antarctica’s Environmental Future, James Cook University, Townsville, Qld, Australia.

3. Collections & Research, Western Australian Museum, Welshpool, WA, Australia.

4. School of Biological Sciences, University of Western Australia, Perth, WA, Australia.

5. Securing Antarctica’s Environmental Future, Western Australian Museum, Welshpool, WA, Australia.

6. Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand.

7. Department of Biological and Environmental Science, University of Jyväskylä, Jyväskylä, Finland.

8. Centre for Functional Ecology - Science for People & the Planet (CFE), Associate Laboratory TERRA, Department of Life Sciences, University of Coimbra, Portugal.

9. Centre for Tropical Bioinformatics and Molecular Biology, James Cook University, Townsville, Qld, Australia.

10. School of Natural Sciences and Ryan Institute, University of Galway, Galway, Ireland.

11. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany.

12. British Antarctic Survey, Cambridge, UK.

Abstract

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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Link

https://www.science.org/doi/pdf/10.1126/science.ade0664

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