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High spatial and temporal variability in Antarctic ice discharge linked to ice shelf buttressing and bed geometry
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...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9243100/ https://www.ncbi.nlm.nih.gov/pubmed/35768612 http://dx.doi.org/10.1038/s41598-022-13517-2 |
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author | Miles, Bertie W. J. Stokes, Chris R. Jamieson, Stewart S. R. Jordan, Jim R. Gudmundsson, G. Hilmar Jenkins, Adrian |
author_facet | Miles, Bertie W. J. Stokes, Chris R. Jamieson, Stewart S. R. Jordan, Jim R. Gudmundsson, G. Hilmar Jenkins, Adrian |
author_sort | Miles, Bertie W. J. |
collection | PubMed |
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. |
format | Online Article Text |
id | pubmed-9243100 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-92431002022-07-01 High spatial and temporal variability in Antarctic ice discharge linked to ice shelf buttressing and bed geometry Miles, Bertie W. J. Stokes, Chris R. Jamieson, Stewart S. R. Jordan, Jim R. Gudmundsson, G. Hilmar Jenkins, Adrian Sci Rep Article 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. Nature Publishing Group UK 2022-06-29 /pmc/articles/PMC9243100/ /pubmed/35768612 http://dx.doi.org/10.1038/s41598-022-13517-2 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Miles, Bertie W. J. Stokes, Chris R. Jamieson, Stewart S. R. Jordan, Jim R. Gudmundsson, G. Hilmar Jenkins, Adrian High spatial and temporal variability in Antarctic ice discharge linked to ice shelf buttressing and bed geometry |
title | 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_short | 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 |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9243100/ https://www.ncbi.nlm.nih.gov/pubmed/35768612 http://dx.doi.org/10.1038/s41598-022-13517-2 |
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