Decadal-scale onset and termination of Antarctic ice-mass loss during the last deglaciation.

Weber, ME; Golledge, NR; Fogwill, CJ; Turney, CSM; Thomas, ZA

Decadal-scale onset and termination of Antarctic ice-mass loss during the last deglaciation.

Weber, ME Golledge, NR Fogwill, CJ Turney, CSM Thomas, ZA

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Publisher:: NATURE PORTFOLIO
Publication Type:: Journal Article
Citation:: Nature communications, 2021, 12, (1), pp. 6683
Issue Date:: 2021-11-18

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Field	Value	Language
dc.contributor.author	Weber, ME
dc.contributor.author	Golledge, NR
dc.contributor.author	Fogwill, CJ
dc.contributor.author	Turney, CSM
dc.contributor.author	Thomas, ZA
dc.date.accessioned	2021-12-24T00:00:57Z
dc.date.available	2021-11-02
dc.date.available	2021-12-24T00:00:57Z
dc.date.issued	2021-11-18
dc.identifier.citation	Nature communications, 2021, 12, (1), pp. 6683
dc.identifier.issn	2041-1723
dc.identifier.issn	2041-1723
dc.identifier.uri	http://hdl.handle.net/10453/152508
dc.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.
dc.format	Electronic
dc.language	eng
dc.publisher	NATURE PORTFOLIO
dc.relation	http://purl.org/au-research/grants/arc/LP120200724
dc.relation	http://purl.org/au-research/grants/arc/DP210103621
dc.relation.ispartof	Nature communications
dc.relation.isbasedon	10.1038/s41467-021-27053-6
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Decadal-scale onset and termination of Antarctic ice-mass loss during the last deglaciation.
dc.type	Journal Article
utslib.citation.volume	12
utslib.location.activity	England
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/DVC (Research)
utslib.copyright.status	open_access	*
dc.date.updated	2021-12-24T00:00:52Z
pubs.issue	1
pubs.publication-status	Published
pubs.volume	12
utslib.citation.issue	1

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.

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http://hdl.handle.net/10453/152508