Decadal-scale onset and termination of Antarctic ice-mass loss during the last deglaciation
Abstract Emerging ice-sheet modeling suggests once initiated, retreat of the Antarctic Ice Sheet (AIS) can continue for centuries. Unfortunately, the short observational record cannot resolve the tipping points, rate of change, and timescale of responses. Iceberg-rafted debris data from Iceberg Alle...
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crspringernat:10.1038/s41467-021-27053-6 2023-05-15T14:08:11+02:00 Decadal-scale onset and termination of Antarctic ice-mass loss during the last deglaciation Weber, Michael E. Golledge, Nicholas R. Fogwill, Chris J. Turney, Chris S. M. Thomas, Zoë A. 2021 http://dx.doi.org/10.1038/s41467-021-27053-6 https://www.nature.com/articles/s41467-021-27053-6.pdf https://www.nature.com/articles/s41467-021-27053-6 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Nature Communications volume 12, issue 1 ISSN 2041-1723 General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry journal-article 2021 crspringernat https://doi.org/10.1038/s41467-021-27053-6 2022-01-04T15:01:40Z Abstract Emerging ice-sheet modeling suggests once initiated, retreat of the Antarctic Ice Sheet (AIS) can continue for centuries. Unfortunately, the short observational record cannot resolve the tipping points, rate of change, and timescale of responses. Iceberg-rafted debris data from Iceberg Alley identify eight retreat phases after the Last Glacial Maximum that each destabilized the AIS within a decade, contributing to global sea-level rise for centuries to a millennium, which subsequently re-stabilized equally rapidly. This dynamic response of the AIS is supported by (i) a West Antarctic blue ice record of ice-elevation drawdown >600 m during three such retreat events related to globally recognized deglacial meltwater pulses, (ii) step-wise retreat up to 400 km across the Ross Sea shelf, (iii) independent ice sheet modeling, and (iv) tipping point analysis. Our findings are consistent with a growing body of evidence suggesting the recent acceleration of AIS mass loss may mark the beginning of a prolonged period of ice sheet retreat and substantial global sea level rise. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Iceberg* Ross Sea Springer Nature (via Crossref) Antarctic The Antarctic Ross Sea Nature Communications 12 1 |
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Open Polar |
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Springer Nature (via Crossref) |
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crspringernat |
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English |
topic |
General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry |
spellingShingle |
General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry Weber, Michael E. Golledge, Nicholas R. Fogwill, Chris J. Turney, Chris S. M. Thomas, Zoë A. Decadal-scale onset and termination of Antarctic ice-mass loss during the last deglaciation |
topic_facet |
General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry |
description |
Abstract Emerging ice-sheet modeling suggests once initiated, retreat of the Antarctic Ice Sheet (AIS) can continue for centuries. Unfortunately, the short observational record cannot resolve the tipping points, rate of change, and timescale of responses. Iceberg-rafted debris data from Iceberg Alley identify eight retreat phases after the Last Glacial Maximum that each destabilized the AIS within a decade, contributing to global sea-level rise for centuries to a millennium, which subsequently re-stabilized equally rapidly. This dynamic response of the AIS is supported by (i) a West Antarctic blue ice record of ice-elevation drawdown >600 m during three such retreat events related to globally recognized deglacial meltwater pulses, (ii) step-wise retreat up to 400 km across the Ross Sea shelf, (iii) independent ice sheet modeling, and (iv) tipping point analysis. Our findings are consistent with a growing body of evidence suggesting the recent acceleration of AIS mass loss may mark the beginning of a prolonged period of ice sheet retreat and substantial global sea level rise. |
format |
Article in Journal/Newspaper |
author |
Weber, Michael E. Golledge, Nicholas R. Fogwill, Chris J. Turney, Chris S. M. Thomas, Zoë A. |
author_facet |
Weber, Michael E. Golledge, Nicholas R. Fogwill, Chris J. Turney, Chris S. M. Thomas, Zoë A. |
author_sort |
Weber, Michael E. |
title |
Decadal-scale onset and termination of Antarctic ice-mass loss during the last deglaciation |
title_short |
Decadal-scale onset and termination of Antarctic ice-mass loss during the last deglaciation |
title_full |
Decadal-scale onset and termination of Antarctic ice-mass loss during the last deglaciation |
title_fullStr |
Decadal-scale onset and termination of Antarctic ice-mass loss during the last deglaciation |
title_full_unstemmed |
Decadal-scale onset and termination of Antarctic ice-mass loss during the last deglaciation |
title_sort |
decadal-scale onset and termination of antarctic ice-mass loss during the last deglaciation |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1038/s41467-021-27053-6 https://www.nature.com/articles/s41467-021-27053-6.pdf https://www.nature.com/articles/s41467-021-27053-6 |
geographic |
Antarctic The Antarctic Ross Sea |
geographic_facet |
Antarctic The Antarctic Ross Sea |
genre |
Antarc* Antarctic Ice Sheet Iceberg* Ross Sea |
genre_facet |
Antarc* Antarctic Ice Sheet Iceberg* Ross Sea |
op_source |
Nature Communications volume 12, issue 1 ISSN 2041-1723 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-021-27053-6 |
container_title |
Nature Communications |
container_volume |
12 |
container_issue |
1 |
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1766280227956195328 |