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High spatial and temporal variability in Antarctic ice discharge linked to ice shelf buttressing and bed geometry
Scientific Reports, Volume: 12, Issue: 1
Swansea University Author:
Jim Jordan
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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...
Published in: | Scientific Reports |
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ISSN: | 2045-2322 |
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Springer Science and Business Media LLC
2022
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URI: | https://cronfa.swan.ac.uk/Record/cronfa64526 |
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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 |
|
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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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facultyofscienceandengineering |
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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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1778823592501313536 |
score |
11.021648 |