论文部分内容阅读
天山托木尔峰科其喀尔巴西冰川是典型的树枝状山谷冰川,利用3组(6期)ASTER遥感影像通过COSI-corr软件反演了该冰川表面运动速度.与花杆测量数据进行对比,反演冰川表面运动速度平均绝对误差为3.1m.a-1,相对误差为11.9%,二者在空间上的分布基本一致,表明其反演精度符合要求.在此基础上,分析冰川表面运动速度空间分布及年际变化特征,结果表明:从空间分布看,冰川上部至末端的表面运动速度在横剖面上均具有从中部向边缘逐渐减少的特征;冰川运动速度具有在积累区随海拔降低逐渐增大,而在消融区则随海拔降低逐渐减小,符合冰川运动的一般规律.2001-2006年间科其喀尔巴西冰川海拔3 600m以上区域表面运动速度增大,而以下区域则呈减小趋势.
Tomsk Peak in Tianshan Mountains The Cretaceous glacier is a typical dendritic valley glacier, and the surface movement velocity of the glacier is retrieved by 3 groups (6 periods) ASTER remote sensing images by COSI-corr software. , The average absolute error of the inversion glacier surface movement speed is 3.1ma-1, the relative error is 11.9%, the distribution of the two in the space is basically the same, which shows that the inversion accuracy meets the requirements.On this basis, the glacier surface movement velocity The results show that: from the perspective of spatial distribution, the surface movement velocity in the upper part of the glacier to the end of the glacier has a decreasing feature from the middle part to the edge in the cross section; the glacier movement velocity gradually decreases as the altitude decreases in the accumulation area , While in the ablation zone it decreases gradually with decreasing altitude, which accords with the general law of glacier movement.From 2001-2006, the surface movement velocity of the glacier in the area of 3 600m above sea level in Kocagar increased while that in the following area decreased trend.