Decadal-scale onset and termination of Antarctic ice-mass loss during the last deglaciation.
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 identif...
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ftunivtsydney:oai:opus.lib.uts.edu.au:10453/152508 2023-05-15T13:52:22+02:00 Decadal-scale onset and termination of Antarctic ice-mass loss during the last deglaciation. Weber, ME Golledge, NR Fogwill, CJ Turney, CSM Thomas, ZA 2021-12-24T00:00:52Z Electronic application/pdf http://hdl.handle.net/10453/152508 eng eng NATURE PORTFOLIO http://purl.org/au-research/grants/arc/LP120200724 Nature communications 10.1038/s41467-021-27053-6 Nature communications, 2021, 12, (1), pp. 6683 2041-1723 http://hdl.handle.net/10453/152508 info:eu-repo/semantics/openAccess Journal Article 2021 ftunivtsydney 2022-03-13T13:51:27Z 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 University of Technology Sydney: OPUS - Open Publications of UTS Scholars Antarctic Ross Sea The Antarctic |
institution |
Open Polar |
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University of Technology Sydney: OPUS - Open Publications of UTS Scholars |
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ftunivtsydney |
language |
English |
description |
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, ME Golledge, NR Fogwill, CJ Turney, CSM Thomas, ZA |
spellingShingle |
Weber, ME Golledge, NR Fogwill, CJ Turney, CSM Thomas, ZA Decadal-scale onset and termination of Antarctic ice-mass loss during the last deglaciation. |
author_facet |
Weber, ME Golledge, NR Fogwill, CJ Turney, CSM Thomas, ZA |
author_sort |
Weber, ME |
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 |
NATURE PORTFOLIO |
publishDate |
2021 |
url |
http://hdl.handle.net/10453/152508 |
geographic |
Antarctic Ross Sea The Antarctic |
geographic_facet |
Antarctic Ross Sea The Antarctic |
genre |
Antarc* Antarctic Ice Sheet Iceberg* Ross Sea |
genre_facet |
Antarc* Antarctic Ice Sheet Iceberg* Ross Sea |
op_relation |
http://purl.org/au-research/grants/arc/LP120200724 Nature communications 10.1038/s41467-021-27053-6 Nature communications, 2021, 12, (1), pp. 6683 2041-1723 http://hdl.handle.net/10453/152508 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766256645020581888 |