Ocean warming drives rapid dynamic activation of marine-terminating glacier on the west Antarctic Peninsula
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 o...
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ftpubmed:oai:pubmedcentral.nih.gov:10684579 2023-12-31T10:01:13+01:00 Ocean warming drives rapid dynamic activation of marine-terminating glacier on the west Antarctic Peninsula Wallis, Benjamin J. Hogg, Anna E. Meredith, Michael P. Close, Romilly Hardy, Dominic McMillan, Malcolm Wuite, Jan Nagler, Thomas Moffat, Carlos 2023-11-28 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10684579/ http://www.ncbi.nlm.nih.gov/pubmed/38016938 https://doi.org/10.1038/s41467-023-42970-4 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10684579/ http://www.ncbi.nlm.nih.gov/pubmed/38016938 http://dx.doi.org/10.1038/s41467-023-42970-4 © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . Nat Commun Article Text 2023 ftpubmed https://doi.org/10.1038/s41467-023-42970-4 2023-12-03T02:03:32Z 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. Text Antarc* Antarctic Antarctic Peninsula Ice Sheet Ice Shelf PubMed Central (PMC) Nature Communications 14 1 |
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Article Wallis, Benjamin J. Hogg, Anna E. Meredith, Michael P. Close, Romilly Hardy, Dominic McMillan, Malcolm Wuite, Jan Nagler, Thomas Moffat, Carlos Ocean warming drives rapid dynamic activation of marine-terminating glacier on the west Antarctic Peninsula |
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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 |
Text |
author |
Wallis, Benjamin J. Hogg, Anna E. Meredith, Michael P. Close, Romilly Hardy, Dominic McMillan, Malcolm Wuite, Jan Nagler, Thomas Moffat, Carlos |
author_facet |
Wallis, Benjamin J. Hogg, Anna E. Meredith, Michael P. Close, Romilly Hardy, Dominic McMillan, Malcolm Wuite, Jan Nagler, Thomas Moffat, Carlos |
author_sort |
Wallis, Benjamin J. |
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 Publishing Group UK |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10684579/ http://www.ncbi.nlm.nih.gov/pubmed/38016938 https://doi.org/10.1038/s41467-023-42970-4 |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Ice Shelf |
op_source |
Nat Commun |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10684579/ http://www.ncbi.nlm.nih.gov/pubmed/38016938 http://dx.doi.org/10.1038/s41467-023-42970-4 |
op_rights |
© The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
op_doi |
https://doi.org/10.1038/s41467-023-42970-4 |
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Nature Communications |
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14 |
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1 |
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