Continuity of the Mass Loss of the World's Glaciers and Ice Caps From the GRACE and GRACE Follow-On Missions

被引：127

作者：

Ciraci, E. ^{[1
]}

Velicogna, I ^{[1
,2
]}

Swenson, S. ^{[3
]}

机构：

[1] Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA

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

[3] Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2020年 / 47卷 / 09期

基金：

美国国家航空航天局;

关键词：

gravity; glacier; sea level; climate model; hydrology; freshwater; SEA-LEVEL RISE; TIME-VARIABLE GRAVITY; ARCTIC GLACIERS; BALANCE; CLIMATE; ARCHIPELAGO; VARIABILITY; GREENLAND; SVALBARD; ICELAND;

D O I：

10.1029/2019GL086926

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We use time series of time-variable gravity from the Gravitational Recovery and Climate Experiment (GRACE) and GRACE Follow-On (GRACE-FO) missions to evaluate the mass balance of the world's glaciers and ice caps (GIC) for the time period April 2002 to September 2019, excluding Antarctica and Greenland peripheral glaciers. We demonstrate continuity of the mass balance record across the GRACE/GRACE-FO data gap using independent data from the GMAO Modern-Era Retrospective Analysis for Research and Applications, Version 2 (MERRA-2) reanalysis. We report an average mass loss of 281.5 +/- 30 Gt/yr, an acceleration of 50 +/- 20 Gt/yr per decade, and a 13-mm cumulative sea level rise for the analyzed period. Seven regions dominate the mass loss, with the largest share from the Arctic: Alaska (72.5 +/- 8 Gt/yr), Canadian Arctic Archipelago (73.0 +/- 9 Gt/yr), Southern Andes (30.4 +/- 13 Gt/yr), High Mountain Asia (HMA) (28.8 +/- 11 Gt/yr), Russian Arctic (20.2 +/- 6 Gt/yr), Iceland (15.9 +/- 4 Gt/yr), and Svalbard (12.1 +/- 4 Gt/yr). At the regional level, the analysis of acceleration is complicated by a strong interannual to decadal variability in mass balance that is well reproduced by the GRACE-calibrated MERRA-2 data.

引用

页数：11

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