Antarctic ice mass variations from 1979 to 2017 driven by anomalous precipitation accumulation
Abstract 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 precipitati...
Published in: | Scientific Reports |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Nature Portfolio
2020
|
Subjects: | |
Online Access: | https://doi.org/10.1038/s41598-020-77403-5 https://doaj.org/article/2a833680320a4c5da2490316939f8d15 |
id |
ftdoajarticles:oai:doaj.org/article:2a833680320a4c5da2490316939f8d15 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:2a833680320a4c5da2490316939f8d15 2023-05-15T13:52:24+02:00 Antarctic ice mass variations from 1979 to 2017 driven by anomalous precipitation accumulation Byeong-Hoon Kim Ki-Weon Seo Jooyoung Eom Jianli Chen Clark R. Wilson 2020-11-01T00:00:00Z https://doi.org/10.1038/s41598-020-77403-5 https://doaj.org/article/2a833680320a4c5da2490316939f8d15 EN eng Nature Portfolio https://doi.org/10.1038/s41598-020-77403-5 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-020-77403-5 2045-2322 https://doaj.org/article/2a833680320a4c5da2490316939f8d15 Scientific Reports, Vol 10, Iss 1, Pp 1-9 (2020) Medicine R Science Q article 2020 ftdoajarticles https://doi.org/10.1038/s41598-020-77403-5 2022-12-31T07:09:10Z Abstract 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. Article in Journal/Newspaper Antarc* Antarctic Directory of Open Access Journals: DOAJ Articles Antarctic Indian Pacific Scientific Reports 10 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Byeong-Hoon Kim Ki-Weon Seo Jooyoung Eom Jianli Chen Clark R. Wilson Antarctic ice mass variations from 1979 to 2017 driven by anomalous precipitation accumulation |
topic_facet |
Medicine R Science Q |
description |
Abstract 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 |
Article in Journal/Newspaper |
author |
Byeong-Hoon Kim Ki-Weon Seo Jooyoung Eom Jianli Chen Clark R. Wilson |
author_facet |
Byeong-Hoon Kim Ki-Weon Seo Jooyoung Eom Jianli Chen Clark R. Wilson |
author_sort |
Byeong-Hoon Kim |
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 Portfolio |
publishDate |
2020 |
url |
https://doi.org/10.1038/s41598-020-77403-5 https://doaj.org/article/2a833680320a4c5da2490316939f8d15 |
geographic |
Antarctic Indian Pacific |
geographic_facet |
Antarctic Indian Pacific |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Scientific Reports, Vol 10, Iss 1, Pp 1-9 (2020) |
op_relation |
https://doi.org/10.1038/s41598-020-77403-5 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-020-77403-5 2045-2322 https://doaj.org/article/2a833680320a4c5da2490316939f8d15 |
op_doi |
https://doi.org/10.1038/s41598-020-77403-5 |
container_title |
Scientific Reports |
container_volume |
10 |
container_issue |
1 |
_version_ |
1766256675952525312 |