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

Sally C Y Lau^{1 2}, Nerida G Wilson^{3 4 5}, Nicholas R Golledge⁶, Tim R Naish⁶, Phillip C Watts⁷, Catarina N S Silva^{1 8}, Ira R Cooke⁹, A Louise Allcock¹⁰, Felix C Mark¹¹, Katrin Linse¹², Jan M Strugnell^{1 2}

Affiliations

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.

PMID:38127761
DOI: 10.1126/science.ade0664

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

Sally C Y Lau et al. Science.2023.

.2023 Dec 22;382(6677):1384-1389.

doi: 10.1126/science.ade0664. Epub 2023 Dec 21.

Authors

Affiliations

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.

PMID:38127761
DOI: 10.1126/science.ade0664

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.

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

Affiliations

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

Authors

Affiliations

Abstract

MeSH terms

Grants and funding

LinkOut - more resources

Full Text Sources

Miscellaneous