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Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds
The Cryosphere, Volume: 17, Issue: 1, Pages: 445 - 456
Swansea University Author:
Jim Jordan
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DOI (Published version): 10.5194/tc-17-445-2023
Abstract
Around large parts of West Antarctica and in Wilkes Land, East Antarctica, increased wind-forced intrusions of modified Circumpolar Deep Water (mCDW) onto the continental shelf have been associated with mass loss over the last few decades. Despite considerable seasonal variability, observations in 2...
Published in: | The Cryosphere |
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ISSN: | 1994-0424 |
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Copernicus GmbH
2023
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URI: | https://cronfa.swan.ac.uk/Record/cronfa64525 |
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v2 64525 2023-09-13 Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds 6f28f48bfe39cb898ba51e3114889cbe 0000-0001-8117-1976 Jim Jordan Jim Jordan true false 2023-09-13 SGE Around large parts of West Antarctica and in Wilkes Land, East Antarctica, increased wind-forced intrusions of modified Circumpolar Deep Water (mCDW) onto the continental shelf have been associated with mass loss over the last few decades. Despite considerable seasonal variability, observations in 2018 have also confirmed relatively high basal melt rates of up to 16 m a−1 underneath the Shirase ice tongue in Enderby Land, East Antarctica. These high basal melt rates are also caused by intrusions of mCDW onto the continental shelf, but the catchment of Shirase Glacier has been gaining mass, a trend often attributed to increased precipitation. Here, we document the dynamical ocean-driven slowdown, ice surface thickening and grounding line advance of Shirase Glacier in response to strengthening easterly winds that reduce mCDW inflow and decrease basal melt rates. Our findings are significant because they demonstrate that warm ice shelf cavity regimes are not universally associated with glacier acceleration and mass loss in Antarctica, and they highlight the overlooked role of the impact of easterly winds in the recent mass gain of the Shirase Glacier catchment. Journal Article The Cryosphere 17 1 445 456 Copernicus GmbH 1994-0424 Shirase Glacier, Antarctica, modified Circumpolar Deep Water, mCDW, basal melt rates, ice loss 1 2 2023 2023-02-01 10.5194/tc-17-445-2023 http://dx.doi.org/10.5194/tc-17-445-2023 COLLEGE NANME Geography COLLEGE CODE SGE Swansea University This research has been supported by the Natural Environment Research Council (grant no. NE/R000824/1) and the Leverhulme Trust (grant no. ECF-2021-484). 2023-10-04T12:27:17.8350081 2023-09-13T12:52:13.6737831 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Geography Bertie W. J. Miles 0000-0002-3388-4688 1 Chris R. Stokes 0000-0003-3355-1573 2 Adrian Jenkins 3 Jim Jordan 0000-0001-8117-1976 4 Stewart S. R. Jamieson 5 G. Hilmar Gudmundsson 0000-0003-4236-5369 6 64525__28577__b5388577843d4484a704ed67d206728b.pdf 64525.pdf 2023-09-19T12:06:01.0042407 Output 7665364 application/pdf Version of Record true © Author(s) 2023. Distributed under the terms of a Creative Commons Attribution 4.0 License (CC BY 4.0). true eng http://creativecommons.org/licenses/by/4.0/ |
title |
Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds |
spellingShingle |
Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds Jim Jordan |
title_short |
Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds |
title_full |
Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds |
title_fullStr |
Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds |
title_full_unstemmed |
Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds |
title_sort |
Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds |
author_id_str_mv |
6f28f48bfe39cb898ba51e3114889cbe |
author_id_fullname_str_mv |
6f28f48bfe39cb898ba51e3114889cbe_***_Jim Jordan |
author |
Jim Jordan |
author2 |
Bertie W. J. Miles Chris R. Stokes Adrian Jenkins Jim Jordan Stewart S. R. Jamieson G. Hilmar Gudmundsson |
format |
Journal article |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
1 |
container_start_page |
445 |
publishDate |
2023 |
institution |
Swansea University |
issn |
1994-0424 |
doi_str_mv |
10.5194/tc-17-445-2023 |
publisher |
Copernicus GmbH |
college_str |
Faculty of Science and Engineering |
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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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Faculty of Science and Engineering |
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School of Biosciences, Geography and Physics - Geography{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Geography |
url |
http://dx.doi.org/10.5194/tc-17-445-2023 |
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description |
Around large parts of West Antarctica and in Wilkes Land, East Antarctica, increased wind-forced intrusions of modified Circumpolar Deep Water (mCDW) onto the continental shelf have been associated with mass loss over the last few decades. Despite considerable seasonal variability, observations in 2018 have also confirmed relatively high basal melt rates of up to 16 m a−1 underneath the Shirase ice tongue in Enderby Land, East Antarctica. These high basal melt rates are also caused by intrusions of mCDW onto the continental shelf, but the catchment of Shirase Glacier has been gaining mass, a trend often attributed to increased precipitation. Here, we document the dynamical ocean-driven slowdown, ice surface thickening and grounding line advance of Shirase Glacier in response to strengthening easterly winds that reduce mCDW inflow and decrease basal melt rates. Our findings are significant because they demonstrate that warm ice shelf cavity regimes are not universally associated with glacier acceleration and mass loss in Antarctica, and they highlight the overlooked role of the impact of easterly winds in the recent mass gain of the Shirase Glacier catchment. |
published_date |
2023-02-01T12:27:19Z |
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1778824081074814976 |
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11.021648 |