Jakobshavn Glacier, west Greenland: 30 years of spaceborne observations
Jakobshavn Glacier, west Greenland: 30 years of spaceborne observations
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格陵兰岛西部雅各布港冰川：30 年的星载观测
DOI：
10.1029/98gl01973
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发表时间：
1998
影响因子：
5.2
通讯作者：
Byrd Polar
中科院分区：
文献类型：
--
作者：
H. Sohn;K. Jezek;C. J. V. D. Veen;Byrd Polar
在对格陵兰中西部边缘波动进行年际和季节性研究时，将1960年代初的侦察卫星图像与最近的图像和地图数据进行了比较。从1962年到1992年，尽管夏季平均气温下降，雅各布港冰川北部和南部的冰盖边缘仍在退缩。这种后退可能会沿着冰流的南翼沿着逆转，那里的区域质量平衡估计是积极的。从1950年到1996年，雅各布港冰川的终点在其年平均位置附近季节性波动约2.5km。夏季的产犊总通量是冬季的6倍以上。我们发现，夏季融化和峡湾中海冰和冰山的破碎对于控制冰山生成速度非常重要。如果正确的话，在不久的将来，如果气候变暖，产犊率可能会增加。
Early 1960's reconnaissance satellite images are compared to more recent image and map data in an interannual and seasonal study of West Central Greenland margin fluctuations. From 1962 to 1992, ice sheet margins to the north and south of Jakobshavn Glacier retreated despite a decline in average summer temperatures. The retreat may be reversing along the southern flank of the ice stream where regional mass balance estimates are positive. From 1950 to 1996, the terminus of Jakobshavn Glacier seasonally fluctuated ∼2.5 km around its annual mean position. The total calving flux during the summer is more than six times that during winter. We identified that summer melting and the break‐up of sea ice and icebergs in the fjord are important in controlling the rate of iceberg production. If correct, calving rates may be expected to increase should climate become warmer in the near future.