Ocean warming drives rapid dynamic activation of marine-terminating glacier on the west Antarctic Peninsula
Abstract Ice dynamic change is the primary cause of mass loss from the Antarctic Ice Sheet, thus it is important to understand the processes driving ice-ocean interactions and the timescale on which major change can occur. Here we use satellite observations to measure a rapid increase in speed and c...
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ftdoajarticles:oai:doaj.org/article:f593329b706f40f1be5befacc59815ef 2024-01-07T09:38:43+01:00 Ocean warming drives rapid dynamic activation of marine-terminating glacier on the west Antarctic Peninsula Benjamin J. Wallis Anna E. Hogg Michael P. Meredith Romilly Close Dominic Hardy Malcolm McMillan Jan Wuite Thomas Nagler Carlos Moffat 2023-11-01T00:00:00Z https://doi.org/10.1038/s41467-023-42970-4 https://doaj.org/article/f593329b706f40f1be5befacc59815ef EN eng Nature Portfolio https://doi.org/10.1038/s41467-023-42970-4 https://doaj.org/toc/2041-1723 doi:10.1038/s41467-023-42970-4 2041-1723 https://doaj.org/article/f593329b706f40f1be5befacc59815ef Nature Communications, Vol 14, Iss 1, Pp 1-14 (2023) Science Q article 2023 ftdoajarticles https://doi.org/10.1038/s41467-023-42970-4 2023-12-10T01:47:47Z Abstract Ice dynamic change is the primary cause of mass loss from the Antarctic Ice Sheet, thus it is important to understand the processes driving ice-ocean interactions and the timescale on which major change can occur. Here we use satellite observations to measure a rapid increase in speed and collapse of the ice shelf fronting Cadman Glacier in the absence of surface meltwater ponding. Between November 2018 and December 2019 ice speed increased by 94 ± 4% (1.47 ± 0.6 km/yr), ice discharge increased by 0.52 ± 0.21 Gt/yr, and the calving front retreated by 8 km with dynamic thinning on grounded ice of 20.1 ± 2.6 m/yr. This change was concurrent with a positive temperature anomaly in the upper ocean, where a 400 m deep channel allowed warm water to reach Cadman Glacier driving the dynamic activation, while neighbouring Funk and Lever Glaciers were protected by bathymetric sills across their fjords. Our results show that forcing by warm ocean water can cause the rapid onset of dynamic imbalance and increased ice discharge from glaciers on the Antarctic Peninsula, highlighting the region’s sensitivity to future climate variability. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ice Sheet Ice Shelf Directory of Open Access Journals: DOAJ Articles Antarctic Antarctic Peninsula Cadman ENVELOPE(-63.833,-63.833,-65.583,-65.583) Cadman Glacier ENVELOPE(-63.742,-63.742,-65.647,-65.647) Lever ENVELOPE(-63.608,-63.608,-65.506,-65.506) The Antarctic Anais da Academia Brasileira de Ciências 95 suppl 3 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
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Science Q |
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Science Q Benjamin J. Wallis Anna E. Hogg Michael P. Meredith Romilly Close Dominic Hardy Malcolm McMillan Jan Wuite Thomas Nagler Carlos Moffat Ocean warming drives rapid dynamic activation of marine-terminating glacier on the west Antarctic Peninsula |
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Science Q |
description |
Abstract Ice dynamic change is the primary cause of mass loss from the Antarctic Ice Sheet, thus it is important to understand the processes driving ice-ocean interactions and the timescale on which major change can occur. Here we use satellite observations to measure a rapid increase in speed and collapse of the ice shelf fronting Cadman Glacier in the absence of surface meltwater ponding. Between November 2018 and December 2019 ice speed increased by 94 ± 4% (1.47 ± 0.6 km/yr), ice discharge increased by 0.52 ± 0.21 Gt/yr, and the calving front retreated by 8 km with dynamic thinning on grounded ice of 20.1 ± 2.6 m/yr. This change was concurrent with a positive temperature anomaly in the upper ocean, where a 400 m deep channel allowed warm water to reach Cadman Glacier driving the dynamic activation, while neighbouring Funk and Lever Glaciers were protected by bathymetric sills across their fjords. Our results show that forcing by warm ocean water can cause the rapid onset of dynamic imbalance and increased ice discharge from glaciers on the Antarctic Peninsula, highlighting the region’s sensitivity to future climate variability. |
format |
Article in Journal/Newspaper |
author |
Benjamin J. Wallis Anna E. Hogg Michael P. Meredith Romilly Close Dominic Hardy Malcolm McMillan Jan Wuite Thomas Nagler Carlos Moffat |
author_facet |
Benjamin J. Wallis Anna E. Hogg Michael P. Meredith Romilly Close Dominic Hardy Malcolm McMillan Jan Wuite Thomas Nagler Carlos Moffat |
author_sort |
Benjamin J. Wallis |
title |
Ocean warming drives rapid dynamic activation of marine-terminating glacier on the west Antarctic Peninsula |
title_short |
Ocean warming drives rapid dynamic activation of marine-terminating glacier on the west Antarctic Peninsula |
title_full |
Ocean warming drives rapid dynamic activation of marine-terminating glacier on the west Antarctic Peninsula |
title_fullStr |
Ocean warming drives rapid dynamic activation of marine-terminating glacier on the west Antarctic Peninsula |
title_full_unstemmed |
Ocean warming drives rapid dynamic activation of marine-terminating glacier on the west Antarctic Peninsula |
title_sort |
ocean warming drives rapid dynamic activation of marine-terminating glacier on the west antarctic peninsula |
publisher |
Nature Portfolio |
publishDate |
2023 |
url |
https://doi.org/10.1038/s41467-023-42970-4 https://doaj.org/article/f593329b706f40f1be5befacc59815ef |
long_lat |
ENVELOPE(-63.833,-63.833,-65.583,-65.583) ENVELOPE(-63.742,-63.742,-65.647,-65.647) ENVELOPE(-63.608,-63.608,-65.506,-65.506) |
geographic |
Antarctic Antarctic Peninsula Cadman Cadman Glacier Lever The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Cadman Cadman Glacier Lever The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Ice Shelf |
op_source |
Nature Communications, Vol 14, Iss 1, Pp 1-14 (2023) |
op_relation |
https://doi.org/10.1038/s41467-023-42970-4 https://doaj.org/toc/2041-1723 doi:10.1038/s41467-023-42970-4 2041-1723 https://doaj.org/article/f593329b706f40f1be5befacc59815ef |
op_doi |
https://doi.org/10.1038/s41467-023-42970-4 |
container_title |
Anais da Academia Brasileira de Ciências |
container_volume |
95 |
container_issue |
suppl 3 |
_version_ |
1787425161854582784 |