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...

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Autores principales:	Byeong-Hoon Kim, Ki-Weon Seo, Jooyoung Eom, Jianli Chen, Clark R. Wilson
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2a833680320a4c5da2490316939f8d15
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spelling	oai:doaj.org-article:2a833680320a4c5da2490316939f8d152021-12-02T12:34:03ZAntarctic ice mass variations from 1979 to 2017 driven by anomalous precipitation accumulation10.1038/s41598-020-77403-52045-2322https://doaj.org/article/2a833680320a4c5da2490316939f8d152020-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-77403-5https://doaj.org/toc/2045-2322Abstract 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.Byeong-Hoon KimKi-Weon SeoJooyoung EomJianli ChenClark R. WilsonNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-9 (2020)
institution	DOAJ
collection	DOAJ
language	EN
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
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
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://doaj.org/article/2a833680320a4c5da2490316939f8d15
work_keys_str_mv	AT byeonghoonkim antarcticicemassvariationsfrom1979to2017drivenbyanomalousprecipitationaccumulation AT kiweonseo antarcticicemassvariationsfrom1979to2017drivenbyanomalousprecipitationaccumulation AT jooyoungeom antarcticicemassvariationsfrom1979to2017drivenbyanomalousprecipitationaccumulation AT jianlichen antarcticicemassvariationsfrom1979to2017drivenbyanomalousprecipitationaccumulation AT clarkrwilson antarcticicemassvariationsfrom1979to2017drivenbyanomalousprecipitationaccumulation
_version_	1718393848711872512

Antarctic ice mass variations from 1979 to 2017 driven by anomalous precipitation accumulation

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