Recent Greenland ice mass loss by drainage system from satellite gravity observations

被引：292

作者：

Luthcke, S. B.

Zwally, H. J.

Abdalati, W.

Rowlands, D. D.

Ray, R. D.

Nerem, R. S.

Lemoine, F. G.

McCarthy, J. J.

Chinn, D. S.

机构：

[1] NASA, Goddard Space Flight Ctr, Planetary Geodynam Lab, Greenbelt, MD 20771 USA

[2] NASA, Goddard Space Flight Ctr, Cryospher Sci Branch, Greenbelt, MD 20771 USA

[3] Univ Colorado, Dept Aerosp Engn Sci, Cooperat Inst Res Environm Sci, Colorado Ctr Astrodynam Res, Boulder, CO 80309 USA

[4] SGT Inc, Div Sci, Greenbelt, MD 20770 USA

来源：

SCIENCE | 2006年 / 314卷 / 5803期

关键词：

SHEET; SURFACE; BALANCE; VARIABILITY; GRACE; EARTH;

D O I：

10.1126/science.1130776

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 changes of the Greenland Ice Sheet resolved by drainage system regions were derived from a local mass concentration analysis of NASA - Deutsches Zentrum fur Luft- und Raumfahrt Gravity Recovery and Climate Experiment ( GRACE mission) observations. From 2003 to 2005, the ice sheet lost 101 +/- 16 gigaton/year, with a gain of 54 gigaton/year above 2000 meters and a loss of 155 gigaton/year at lower elevations. The lower elevations show a large seasonal cycle, with mass losses during summer melting followed by gains from fall through spring. The overall rate of loss reflects a considerable change in trend ( - 113 +/- 17 gigaton/ year) from a near balance during the 1990s but is smaller than some other recent estimates.

引用

页码：1286 / 1289

页数：4

共 20 条

[1] Greenland ice sheet melt extent: 1979-1999 [J].