Mass loss of Greenland's glaciers and ice caps 2003-2008 revealed from ICESat laser altimetry data

被引：117
作者：
Bolch, T. [1 ,2 ]
Sorensen, L. Sandberg [3 ]
Simonsen, S. B. [4 ,5 ]
Moelg, N. [1 ]
Machguth, H. [1 ,6 ]
Rastner, P. [1 ]
Paul, F. [1 ]
机构：
[1] Univ Zurich, Dept Geog, CH-8057 Zurich, Switzerland
[2] Tech Univ Dresden, Inst Cartog, D-01069 Dresden, Germany
[3] DTU Space, Geodynam Dept, DK-2800 Lyngby, Denmark
[4] Univ Copenhagen, NBI, Ctr Ice & Climate, DK-2100 Copenhagen, Denmark
[5] DMI, Danish Climate Ctr, DK-2100 Copenhagen, Denmark
[6] Geol Survey Denmark & Greenland GEUS, DK-1350 Copenhagen, Denmark
来源：
GEOPHYSICAL RESEARCH LETTERS | 2013年 / 40卷 / 05期
关键词：
Mass budget; Glaciers and Ice caps; Greenland; ICESat; FIRN-DENSIFICATION; LOCAL GLACIERS; INVENTORY; FLUCTUATIONS; BALANCE;
D O I：
10.1002/grl.50270
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
The recently finalized inventory of Greenland's glaciers and ice caps (GIC) allows for the first time to determine the mass changes of the GIC separately from the ice sheet using space-borne laser altimetry data. Corrections for firn compaction and density that are based on climatic conditions are applied for the conversion from volume to mass changes. The GIC which are clearly separable from the icesheet (i.e., have a distinct ice divide or no connection) lost 27.9 +/- 10.7 Gt a1 or 0.08 +/- 0.03 mm a1 sea-level equivalent (SLE) between October 2003 and March 2008. All GIC (including those with strong but hydrologically separable connections) lost 40.9 +/- 16.5 Gt a1 (0.12 +/- 0.05 mm a1 SLE). This is a significant fraction (similar to 14 or 20%) of the reported overall mass loss of Greenland and up to 10% of the estimated contribution from the world's GIC to sea level rise. The loss was highest in southeastern and lowest in northern Greenland.
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收藏
页码：875 / 881
页数：7
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