Wallis, BJ, Hogg, AE orcid.org/0000-0002-6441-4937, van Wessem, JM et al. (2 more authors) (2023) Widespread seasonal speed-up of west Antarctic Peninsula glaciers from 2014 to 2021. Nature Geoscience, 16 (3). pp. 231-237. ISSN 1752-0894
Abstract
Mass loss from the Antarctic Ice Sheet is dominated by ice dynamics, where ocean-driven melt leads to un-buttressing and ice flow acceleration. Long-term ice speed change has been measured in Antarctica over the past four decades; however, there are limited observations of short-term seasonal speed variability on the grounded ice sheet. Here we assess seasonal variations in ice flow speed on 105 glaciers on the west Antarctic Peninsula using Sentinel-1 satellite observations spanning 2014 to 2021. We find an average summer speed-up of 12.4 ± 4.2%, with maximum speed change of up to 22.3 ± 3.2% on glaciers with the most pronounced seasonality. Our results show that over the six-year study period, glaciers on the west Antarctic Peninsula respond to seasonal forcing in the ice–ocean–atmosphere system, indicating sensitivity to changes in terminus position, surface melt plus rainwater flux, and ocean temperature. Seasonal speed variations must be accounted for when measuring the mass balance and sea level contribution of the Antarctic Peninsula, and studies must establish the future evolution of this previously undocumented signal under climate warming scenarios.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s), under exclusive licence to Springer Nature Limited 2023. This is an author produced version of an article published in Nature Geoscience. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst for Climate & Atmos Science (ICAS) (Leeds) |
Funding Information: | Funder Grant number NERC (Natural Environment Research Council) NE/T012757/1 European Space Agency 4000132186/20/I-EF NERC DTP NE/S007458/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 20 Mar 2023 12:37 |
Last Modified: | 27 Aug 2023 00:13 |
Status: | Published |
Publisher: | Nature Research |
Identification Number: | 10.1038/s41561-023-01131-4 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:196885 |
Commentary/Response Threads
- Wallis, BJ, Hogg, AE, van Wessem, JM, Davison, BJ and van den Broeke, MR Widespread seasonal speed-up of west Antarctic Peninsula glaciers from 2014 to 2021. (deposited 20 Mar 2023 12:37) [Currently Displayed]