Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds

J., Bertie W.; Stokes, Chris R.; Jenkins, Adrian; Jordan, Jim; R., Stewart S.; Gudmundsson, G. Hilmar

doi:10.5194/tc-17-445-2023

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Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds

Bertie W. J. Miles

, Chris R. Stokes

, Adrian Jenkins, Jim Jordan

, Stewart S. R. Jamieson, G. Hilmar Gudmundsson

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...

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Published in:	The Cryosphere
ISSN:	1994-0424
Published:	Copernicus GmbH 2023
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa64525
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spelling	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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hierarchy_top_id	facultyofscienceandengineering
hierarchy_top_title	Faculty of Science and Engineering
hierarchy_parent_id	facultyofscienceandengineering
hierarchy_parent_title	Faculty of Science and Engineering
department_str	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
document_store_str	1
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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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score	11.021648

Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds

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