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Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018

Heather L. Selley, Anna E. Hogg, Stephen Cornford Orcid Logo, Pierre Dutrieux, Andrew Shepherd, Jan Wuite, Dana Floricioiu, Anders Kusk, Thomas Nagler, Lin Gilbert, Thomas Slater, Tae-Wan Kim

Nature Communications, Volume: 12, Issue: 1

Swansea University Author: Stephen Cornford Orcid Logo

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DOI (Published version): 10.1038/s41467-021-21321-1

Abstract

The Getz region of West Antarctica is losing ice at an increasing rate; however, the forcing mechanisms remain unclear. Here we use satellite observations and an ice sheet model to measure the change in ice speed and mass balance of the drainage basin over the last 25-years. Our results show a mean...

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Published in: Nature Communications
ISSN: 2041-1723
Published: Springer Science and Business Media LLC 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa56308
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first_indexed 2021-03-10T17:50:09Z
last_indexed 2021-09-21T03:18:54Z
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spelling 2021-09-20T15:54:39.6967824 v2 56308 2021-02-23 Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018 17ae00ff2346b8c23d7e2b34341610a4 0000-0003-1844-274X Stephen Cornford Stephen Cornford true false 2021-02-23 SGE The Getz region of West Antarctica is losing ice at an increasing rate; however, the forcing mechanisms remain unclear. Here we use satellite observations and an ice sheet model to measure the change in ice speed and mass balance of the drainage basin over the last 25-years. Our results show a mean increase in speed of 23.8 % between 1994 and 2018, with three glaciers accelerating by over 44 %. Speedup across the Getz basin is linear, with speedup and thinning directly correlated confirming the presence of dynamic imbalance. Since 1994, 315 Gt of ice has been lost contributing 0.9 ± 0.6 mm global mean sea level, with increased loss since 2010 caused by a snowfall reduction. Overall, dynamic imbalance accounts for two thirds of the mass loss from this region of West Antarctica over the past 25-years, with a longer-term response to ocean forcing the likely driving mechanism. Journal Article Nature Communications 12 1 Springer Science and Business Media LLC 2041-1723 23 2 2021 2021-02-23 10.1038/s41467-021-21321-1 COLLEGE NANME Geography COLLEGE CODE SGE Swansea University CPOM 2021-09-20T15:54:39.6967824 2021-02-23T14:03:06.4650291 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Geography Heather L. Selley 1 Anna E. Hogg 2 Stephen Cornford 0000-0003-1844-274X 3 Pierre Dutrieux 4 Andrew Shepherd 5 Jan Wuite 6 Dana Floricioiu 7 Anders Kusk 8 Thomas Nagler 9 Lin Gilbert 10 Thomas Slater 11 Tae-Wan Kim 12 56308__19469__0e4bf6bdae6a46cc91b36779ec6d80b3.pdf 56308.pdf 2021-03-10T17:49:35.7495457 Output 3718501 application/pdf Version of Record true © The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License true eng http://creativecommons.org/licenses/by/4.0/
title Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018
spellingShingle Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018
Stephen Cornford
title_short Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018
title_full Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018
title_fullStr Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018
title_full_unstemmed Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018
title_sort Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018
author_id_str_mv 17ae00ff2346b8c23d7e2b34341610a4
author_id_fullname_str_mv 17ae00ff2346b8c23d7e2b34341610a4_***_Stephen Cornford
author Stephen Cornford
author2 Heather L. Selley
Anna E. Hogg
Stephen Cornford
Pierre Dutrieux
Andrew Shepherd
Jan Wuite
Dana Floricioiu
Anders Kusk
Thomas Nagler
Lin Gilbert
Thomas Slater
Tae-Wan Kim
format Journal article
container_title Nature Communications
container_volume 12
container_issue 1
publishDate 2021
institution Swansea University
issn 2041-1723
doi_str_mv 10.1038/s41467-021-21321-1
publisher Springer Science and Business Media LLC
college_str Faculty of Science and Engineering
hierarchytype
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
document_store_str 1
active_str 0
description The Getz region of West Antarctica is losing ice at an increasing rate; however, the forcing mechanisms remain unclear. Here we use satellite observations and an ice sheet model to measure the change in ice speed and mass balance of the drainage basin over the last 25-years. Our results show a mean increase in speed of 23.8 % between 1994 and 2018, with three glaciers accelerating by over 44 %. Speedup across the Getz basin is linear, with speedup and thinning directly correlated confirming the presence of dynamic imbalance. Since 1994, 315 Gt of ice has been lost contributing 0.9 ± 0.6 mm global mean sea level, with increased loss since 2010 caused by a snowfall reduction. Overall, dynamic imbalance accounts for two thirds of the mass loss from this region of West Antarctica over the past 25-years, with a longer-term response to ocean forcing the likely driving mechanism.
published_date 2021-02-23T04:11:10Z
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score 10.9979105

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