Progressive increase in ice loss from Greenland
Progressive increase in ice loss from Greenland
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DOI：
10.1029/2006gl026075
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发表时间：
2006-05
影响因子：
5.2
通讯作者：
R. Thomas;E. Frederick;W. Krabill;S. Manizade;C. Martin
中科院分区：
文献类型：
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作者：
R. Thomas;E. Frederick;W. Krabill;S. Manizade;C. Martin
激光高度计在格陵兰岛上空的测量显示，2000米以上的增厚速度正在增加，这反映了气候变暖导致的降雪增加。但自20世纪90年代中期以来，近海变薄速度大幅增加，净质量损失从1993年4月至1998年9月期间的平均4-50GT年−1增加一倍以上，至1998年9月至2004年期间的57-105GT年−1。这一增长趋势与独立质量预算研究的结果非常相似，但与ERS雷达高度计的结果大不相同。这可能是由于在倾斜和起伏的表面上存在大量ERS足迹相关的限制，这些表面是快速狭窄冰川的典型特征，在这些冰川变薄最明显的地方。
Laser altimeter measurements over Greenland show increasing thickening rates above 2000 m, reflecting increasing snowfall in a warming climate. But near‐coastal thinning rates have increased substantially since the mid 1990s, and net mass loss more than doubled from an average of 4–50 Gt yr−1 between 1993/4 and 1998/9 to 57–105 Gt yr−1 between 1998/9 and 2004. This increasing trend is very similar to findings from independent mass‐budget studies, but differs widely from ERS radar altimeter results. This may result from limitations associated with the large ERS footprint over sloping and undulating surfaces that typify fast, narrow glaciers where thinning is most pronounced.