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High spatial and temporal variability in Antarctic ice discharge linked to ice shelf buttressing and bed geometry

Bertie W. J. Miles, Chris R. Stokes, Stewart S. R. Jamieson, Jim Jordan Orcid Logo, G. Hilmar Gudmundsson, Adrian Jenkins

Scientific Reports, Volume: 12, Issue: 1

Swansea University Author: Jim Jordan Orcid Logo

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DOI (Published version): 10.1038/s41598-022-13517-2

Abstract

Antarctica’s contribution to global mean sea level rise has been driven by an increase in ice discharge into the oceans. The rate of change and the mechanisms that drive variability in ice discharge are therefore important to consider in the context of projected future warming. Here, we report obser...

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Published in: Scientific Reports
ISSN: 2045-2322
Published: Springer Science and Business Media LLC 2022
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URI: https://cronfa.swan.ac.uk/Record/cronfa64526
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first_indexed 2023-09-19T11:19:16Z
last_indexed 2023-09-19T11:19:16Z
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spelling v2 64526 2023-09-13 High spatial and temporal variability in Antarctic ice discharge linked to ice shelf buttressing and bed geometry 6f28f48bfe39cb898ba51e3114889cbe 0000-0001-8117-1976 Jim Jordan Jim Jordan true false 2023-09-13 SGE Antarctica’s contribution to global mean sea level rise has been driven by an increase in ice discharge into the oceans. The rate of change and the mechanisms that drive variability in ice discharge are therefore important to consider in the context of projected future warming. Here, we report observations of both decadal trends and inter-annual variability in ice discharge across the Antarctic Ice Sheet at a variety of spatial scales that range from large drainage basins to individual outlet glacier catchments. Overall, we find a 37 ± 11 Gt year−1 increase in discharge between 1999 and 2010, but a much smaller increase of 4 ± 8 Gt year−1 between 2010 and 2018. Furthermore, comparisons reveal that neighbouring outlet glaciers can behave synchronously, but others show opposing trends, despite their close proximity. We link this spatial and temporal variability to changes in ice shelf buttressing and the modulating effect of local glacier geometry. Journal Article Scientific Reports 12 1 Springer Science and Business Media LLC 2045-2322 Antarctic ice sheet, seal level rise, ice discharge, ice sheet, buttressing 29 6 2022 2022-06-29 10.1038/s41598-022-13517-2 http://dx.doi.org/10.1038/s41598-022-13517-2 COLLEGE NANME Geography COLLEGE CODE SGE Swansea University NERC NE/R000824/1 2023-10-04T12:19:31.9359615 2023-09-13T13:19:43.9911615 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Geography Bertie W. J. Miles 1 Chris R. Stokes 2 Stewart S. R. Jamieson 3 Jim Jordan 0000-0001-8117-1976 4 G. Hilmar Gudmundsson 5 Adrian Jenkins 6 64526__28578__a20f9557c1fa48be96b7acb1e3b641a5.pdf 64526.pdf 2023-09-19T12:18:36.0374750 Output 4402075 application/pdf Version of Record true © The Author(s) 2022. Distributed under the terms of a Creative Commons Attribution 4.0 License (CC BY 4.0). false eng http://creativecommons.org/licenses/by/4.0/
title High spatial and temporal variability in Antarctic ice discharge linked to ice shelf buttressing and bed geometry
spellingShingle High spatial and temporal variability in Antarctic ice discharge linked to ice shelf buttressing and bed geometry
Jim Jordan
title_short High spatial and temporal variability in Antarctic ice discharge linked to ice shelf buttressing and bed geometry
title_full High spatial and temporal variability in Antarctic ice discharge linked to ice shelf buttressing and bed geometry
title_fullStr High spatial and temporal variability in Antarctic ice discharge linked to ice shelf buttressing and bed geometry
title_full_unstemmed High spatial and temporal variability in Antarctic ice discharge linked to ice shelf buttressing and bed geometry
title_sort High spatial and temporal variability in Antarctic ice discharge linked to ice shelf buttressing and bed geometry
author_id_str_mv 6f28f48bfe39cb898ba51e3114889cbe
author_id_fullname_str_mv 6f28f48bfe39cb898ba51e3114889cbe_***_Jim Jordan
author Jim Jordan
author2 Bertie W. J. Miles
Chris R. Stokes
Stewart S. R. Jamieson
Jim Jordan
G. Hilmar Gudmundsson
Adrian Jenkins
format Journal article
container_title Scientific Reports
container_volume 12
container_issue 1
publishDate 2022
institution Swansea University
issn 2045-2322
doi_str_mv 10.1038/s41598-022-13517-2
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
url http://dx.doi.org/10.1038/s41598-022-13517-2
document_store_str 1
active_str 0
description Antarctica’s contribution to global mean sea level rise has been driven by an increase in ice discharge into the oceans. The rate of change and the mechanisms that drive variability in ice discharge are therefore important to consider in the context of projected future warming. Here, we report observations of both decadal trends and inter-annual variability in ice discharge across the Antarctic Ice Sheet at a variety of spatial scales that range from large drainage basins to individual outlet glacier catchments. Overall, we find a 37 ± 11 Gt year−1 increase in discharge between 1999 and 2010, but a much smaller increase of 4 ± 8 Gt year−1 between 2010 and 2018. Furthermore, comparisons reveal that neighbouring outlet glaciers can behave synchronously, but others show opposing trends, despite their close proximity. We link this spatial and temporal variability to changes in ice shelf buttressing and the modulating effect of local glacier geometry.
published_date 2022-06-29T12:19:33Z
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score 11.021648

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