Multi-decadal record of ice dynamics on Daugaard Jensen Gletscher, East Greenland, from satellite imagery and terrestrial measurements
Multi-decadal record of ice dynamics on Daugaard Jensen Gletscher, East Greenland, from satellite imagery and terrestrial measurements
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来自卫星图像和地面测量的东格陵兰岛 Daugaard Jensen Gletscher 冰动态的数十年记录
DOI：
10.3189/172756405781812565
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发表时间：
2005
影响因子：
2.9
通讯作者：
N. Reeh
中科院分区：
文献类型：
--
作者：
L. Stearns;G. Hamilton;N. Reeh
摘要利用1950 ~ 2001年的野外测量、航空摄影和卫星影像资料，重建了东格陵兰岛大型出口冰川Daugaard Jensen Gletscher的冰速和产冰前沿位置的历史。在过去的50年里，冰川的产犊终点一直保持在大致相同的位置。根据陆地测量得出的速度和使用连续卫星图像的特征跟踪得出的速度的比较，没有证据表明1968年至2001年间冰的运动发生了变化。峡湾入口附近的通量与内部集水区的积雪的估计表明，道加德·詹森·格莱彻有一个小的负质量平衡。这一结果与冰川内陆地区的其他质量平衡估计一致。
Abstract The history of ice velocity and calving front position of Daugaard Jensen Gletscher, a large outlet glacier in East Greenland, is reconstructed from field measurements, aerial photography and satellite imagery for the period 1950-2001. The calving terminus of the glacier has remained in approximately the same position over the past ∼50 years. There is no evidence of a change in ice motion between 1968 and 2001, based on a comparison of velocities derived from terrestrial surveying and feature tracking using sequential satellite images. Estimates of flux near the entrance to the fjord vs snow accumulation in the interior catchment show that Daugaard Jensen Gletscher has a small negative mass balance. This result is consistent with other mass-balance estimates for the inland region of the glacier.