Widespread seasonal speed-up of west Antarctic Peninsula glaciers from 2014 to 2021
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...
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ftleedsuniv:oai:eprints.whiterose.ac.uk:196885 2023-05-15T14:07:47+02:00 Widespread seasonal speed-up of west Antarctic Peninsula glaciers from 2014 to 2021 Wallis, BJ Hogg, AE van Wessem, JM Davison, BJ van den Broeke, MR 2023-03 text https://eprints.whiterose.ac.uk/196885/ https://eprints.whiterose.ac.uk/196885/1/Widespread_seasonal_speed-up_of_west_Antarctic_Peninsula_glaciers_from_2014-2021_AAM.pdf https://eprints.whiterose.ac.uk/196885/2/Wallis_2023_AAM_supporting_information.pdf en eng Nature Research https://eprints.whiterose.ac.uk/196885/1/Widespread_seasonal_speed-up_of_west_Antarctic_Peninsula_glaciers_from_2014-2021_AAM.pdf https://eprints.whiterose.ac.uk/196885/2/Wallis_2023_AAM_supporting_information.pdf 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 cc_by_4 Article NonPeerReviewed 2023 ftleedsuniv 2023-03-23T23:17:15Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet White Rose Research Online (Universities of Leeds, Sheffield & York) Antarctic Antarctic Peninsula The Antarctic |
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Open Polar |
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White Rose Research Online (Universities of Leeds, Sheffield & York) |
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ftleedsuniv |
language |
English |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Wallis, BJ Hogg, AE van Wessem, JM Davison, BJ van den Broeke, MR |
spellingShingle |
Wallis, BJ Hogg, AE van Wessem, JM Davison, BJ van den Broeke, MR Widespread seasonal speed-up of west Antarctic Peninsula glaciers from 2014 to 2021 |
author_facet |
Wallis, BJ Hogg, AE van Wessem, JM Davison, BJ van den Broeke, MR |
author_sort |
Wallis, BJ |
title |
Widespread seasonal speed-up of west Antarctic Peninsula glaciers from 2014 to 2021 |
title_short |
Widespread seasonal speed-up of west Antarctic Peninsula glaciers from 2014 to 2021 |
title_full |
Widespread seasonal speed-up of west Antarctic Peninsula glaciers from 2014 to 2021 |
title_fullStr |
Widespread seasonal speed-up of west Antarctic Peninsula glaciers from 2014 to 2021 |
title_full_unstemmed |
Widespread seasonal speed-up of west Antarctic Peninsula glaciers from 2014 to 2021 |
title_sort |
widespread seasonal speed-up of west antarctic peninsula glaciers from 2014 to 2021 |
publisher |
Nature Research |
publishDate |
2023 |
url |
https://eprints.whiterose.ac.uk/196885/ https://eprints.whiterose.ac.uk/196885/1/Widespread_seasonal_speed-up_of_west_Antarctic_Peninsula_glaciers_from_2014-2021_AAM.pdf https://eprints.whiterose.ac.uk/196885/2/Wallis_2023_AAM_supporting_information.pdf |
geographic |
Antarctic Antarctic Peninsula The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet |
op_relation |
https://eprints.whiterose.ac.uk/196885/1/Widespread_seasonal_speed-up_of_west_Antarctic_Peninsula_glaciers_from_2014-2021_AAM.pdf https://eprints.whiterose.ac.uk/196885/2/Wallis_2023_AAM_supporting_information.pdf 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 |
op_rights |
cc_by_4 |
_version_ |
1766279801630359552 |