Annual mass budget of Antarctic ice shelves from 1997 to 2021

被引：25

作者：

Davison, Benjamin J. ^{[1
]}

Hogg, Anna E. ^{[1
]}

Gourmelen, Noel ^{[2
,3
]}

Jakob, Livia ^{[3
]}

Wuite, Jan ^{[4
]}

Nagler, Thomas ^{[4
]}

Greene, Chad A. ^{[5
]}

Andreasen, Julia ^{[6
]}

Engdahl, Marcus E. ^{[7
]}

机构：

[1] Univ Leeds, Sch Earth & Environm, Leeds, England

[2] Univ Edinburgh, Sch Geosci, Edinburgh, Scotland

[3] Earthwave, Codebase, Off L2, 3 Lady Lawson St, Edinburgh, Scotland

[4] ENVEO IT GmbH, A-6020 Innsbruck, Austria

[5] CALTECH, Jet Prop Lab, Pasadena, CA USA

[6] Univ Minnesota, Dept Soil Water & Climate, St Paul, MN USA

[7] ESA ESRIN, Largo Galileo Galilei 1, I-00044 Frascati, Italy

来源：

SCIENCE ADVANCES | 2023年 / 9卷 / 41期

基金：

美国国家航空航天局;

关键词：

AMUNDSEN SEA EMBAYMENT; BASAL MELT RATES; WEST ANTARCTICA; KOHLER GLACIERS; SOUTHERN-OCEAN; PINE ISLAND; RETREAT; LARSEN; CLIMATE; DRIVEN;

D O I：

10.1126/sciadv.adi0186

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Antarctic ice shelves moderate the contribution of the Antarctic Ice Sheet to global sea level rise; however, ice shelf health remains poorly constrained. Here, we present the annual mass budget of all Antarctic ice shelves from 1997 to 2021. Out of 162 ice shelves, 71 lost mass, 29 gained mass, and 62 did not change mass significantly. Of the shelves that lost mass, 68 had statistically significant negative mass trends, 48 lost more than 30% of their initial mass, and basal melting was the dominant contributor to that mass loss at a majority (68%). At many ice shelves, mass losses due to basal melting or iceberg calving were significantly positively correlated with grounding line discharge anomalies; however, the strength and form of this relationship varied substantially between ice shelves. Our results illustrate the utility of partitioning high-resolution ice shelf mass balance observations into its components to quantify the contributors to ice shelf mass change and the response of grounded ice.

引用

页数：12

共 106 条

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