Partitioning Recent Greenland Mass Loss

被引：654

作者：

van den Broeke, Michiel ^{[1
]}

Bamber, Jonathan ^{[2
]}

Ettema, Janneke ^{[1
]}

Rignot, Eric ^{[3
,4
]}

Schrama, Ernst ^{[5
]}

van de Berg, Willem Jan ^{[1
]}

van Meijgaard, Erik ^{[6
]}

Velicogna, Isabella ^{[3
,4
]}

Wouters, Bert ^{[5
,6
]}

机构：

[1] Univ Utrecht, Inst Marine & Atmospher Res, NL-3508 TC Utrecht, Netherlands

[2] Univ Bristol, Sch Geog Sci, Bristol Glaciol Ctr, Bristol, Avon, England

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

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

[5] Delft Univ Technol, Delft Inst Earth Observat & Space Syst, Delft, Netherlands

[6] Royal Netherlands Meteorol Inst, NL-3730 AE De Bilt, Netherlands

来源：

SCIENCE | 2009年 / 326卷 / 5955期

基金：

英国自然环境研究理事会;

关键词：

ICE-SHEET; MELT; ACCELERATION;

D O I：

10.1126/science.1178176

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：

Mass budget calculations, validated with satellite gravity observations [from the Gravity Recovery and Climate Experiment (GRACE) satellites], enable us to quantify the individual components of recent Greenland mass loss. The total 2000-2008 mass loss of similar to 1500 gigatons, equivalent to 0.46 millimeters per year of global sea level rise, is equally split between surface processes (runoff and precipitation) and ice dynamics. Without the moderating effects of increased snowfall and refreezing, post-1996 Greenland ice sheet mass losses would have been 100% higher. Since 2006, high summer melt rates have increased Greenland ice sheet mass loss to 273 gigatons per year (0.75 millimeters per year of equivalent sea level rise). The seasonal cycle in surface mass balance fully accounts for detrended GRACE mass variations, confirming insignificant subannual variation in ice sheet discharge.

引用

页码：984 / 986

页数：3

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