Antarctic ice mass variations from 1979 to 2017 driven by anomalous precipitation accumulation
Antarctic ice mass balance is determined by precipitation and ice discharge, and understanding their relative contributions to contemporary Antarctic ice mass change is important to project future ice mass loss and resulting sea level rise. There has been evidence that anomalous precipitation affect...
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ftpubmed:oai:pubmedcentral.nih.gov:7683593 2023-05-15T13:30:38+02:00 Antarctic ice mass variations from 1979 to 2017 driven by anomalous precipitation accumulation Kim, Byeong-Hoon Seo, Ki-Weon Eom, Jooyoung Chen, Jianli Wilson, Clark R. 2020-11-23 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7683593/ http://www.ncbi.nlm.nih.gov/pubmed/33230242 https://doi.org/10.1038/s41598-020-77403-5 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7683593/ http://www.ncbi.nlm.nih.gov/pubmed/33230242 http://dx.doi.org/10.1038/s41598-020-77403-5 © The Author(s) 2020 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/. CC-BY Sci Rep Article Text 2020 ftpubmed https://doi.org/10.1038/s41598-020-77403-5 2020-11-29T01:33:00Z Antarctic ice mass balance is determined by precipitation and ice discharge, and understanding their relative contributions to contemporary Antarctic ice mass change is important to project future ice mass loss and resulting sea level rise. There has been evidence that anomalous precipitation affects Antarctic ice mass loss estimates, and thus the precipitation contribution should be understood and considered in future projections. In this study, we revisit changes in Antarctic ice mass over recent decades and examine precipitation contributions over this period. We show that accumulated (time-integrated) precipitation explains most inter-annual anomalies of Antarctic ice mass change during the GRACE period (2003–2017). From 1979 to 2017, accumulated Antarctic precipitation contributes to significant ice mass loss acceleration in the Pacific sector and deceleration in the Atlantic-Indian Sectors, forming a bi-polar spatial pattern. Principal component analysis reveals that such a bi-polar pattern is likely modulated by the Southern Annular Mode (SAM). We also find that recent ice mass loss acceleration in 2007 is related to a variation in precipitation accumulation. Overall ice discharge has accelerated at a steady rate since 1992, but has not seen a recent abrupt increase. Text Antarc* Antarctic PubMed Central (PMC) Antarctic Indian Pacific Scientific Reports 10 1 |
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Article Kim, Byeong-Hoon Seo, Ki-Weon Eom, Jooyoung Chen, Jianli Wilson, Clark R. Antarctic ice mass variations from 1979 to 2017 driven by anomalous precipitation accumulation |
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description |
Antarctic ice mass balance is determined by precipitation and ice discharge, and understanding their relative contributions to contemporary Antarctic ice mass change is important to project future ice mass loss and resulting sea level rise. There has been evidence that anomalous precipitation affects Antarctic ice mass loss estimates, and thus the precipitation contribution should be understood and considered in future projections. In this study, we revisit changes in Antarctic ice mass over recent decades and examine precipitation contributions over this period. We show that accumulated (time-integrated) precipitation explains most inter-annual anomalies of Antarctic ice mass change during the GRACE period (2003–2017). From 1979 to 2017, accumulated Antarctic precipitation contributes to significant ice mass loss acceleration in the Pacific sector and deceleration in the Atlantic-Indian Sectors, forming a bi-polar spatial pattern. Principal component analysis reveals that such a bi-polar pattern is likely modulated by the Southern Annular Mode (SAM). We also find that recent ice mass loss acceleration in 2007 is related to a variation in precipitation accumulation. Overall ice discharge has accelerated at a steady rate since 1992, but has not seen a recent abrupt increase. |
format |
Text |
author |
Kim, Byeong-Hoon Seo, Ki-Weon Eom, Jooyoung Chen, Jianli Wilson, Clark R. |
author_facet |
Kim, Byeong-Hoon Seo, Ki-Weon Eom, Jooyoung Chen, Jianli Wilson, Clark R. |
author_sort |
Kim, Byeong-Hoon |
title |
Antarctic ice mass variations from 1979 to 2017 driven by anomalous precipitation accumulation |
title_short |
Antarctic ice mass variations from 1979 to 2017 driven by anomalous precipitation accumulation |
title_full |
Antarctic ice mass variations from 1979 to 2017 driven by anomalous precipitation accumulation |
title_fullStr |
Antarctic ice mass variations from 1979 to 2017 driven by anomalous precipitation accumulation |
title_full_unstemmed |
Antarctic ice mass variations from 1979 to 2017 driven by anomalous precipitation accumulation |
title_sort |
antarctic ice mass variations from 1979 to 2017 driven by anomalous precipitation accumulation |
publisher |
Nature Publishing Group UK |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7683593/ http://www.ncbi.nlm.nih.gov/pubmed/33230242 https://doi.org/10.1038/s41598-020-77403-5 |
geographic |
Antarctic Indian Pacific |
geographic_facet |
Antarctic Indian Pacific |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Sci Rep |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7683593/ http://www.ncbi.nlm.nih.gov/pubmed/33230242 http://dx.doi.org/10.1038/s41598-020-77403-5 |
op_rights |
© The Author(s) 2020 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/. |
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CC-BY |
op_doi |
https://doi.org/10.1038/s41598-020-77403-5 |
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Scientific Reports |
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10 |
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1 |
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1766011062365192192 |