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冰川地形是构建冰川流动模型的基础,对于认识冰川响应气候变化的动力机制具有重要意义.在2009年和2014年消融季,使用探地雷达对祁连山老虎沟12号冰川进行了厚度测量和冰下地形观测,获得了沿冰川中流线和多条横剖面的厚度资料,并对中流线上的厚度分布特征和槽谷形态进行了研究.研究结果表明,东、西支冰川的平均厚度分别为190 m和150 m,东支冰川冰下地形起伏大于西支,支冰川的表面坡度都较缓和.东、西支冰川进入汇合区时厚度分别为122 m和157 m,由于支冰川的横向挤压和汇流,汇合区中部冰川厚度增加到162 m.冰川槽谷形态具有空间差异,东、西支冰川槽谷形态近似于对称的V型,但是在冰川汇合区,槽谷底部变宽,边坡变缓,发育有不对称槽谷.
Glacier terrain is the basis for constructing glacier flow model and is of great significance for understanding the dynamic mechanism of glacier response to climate change.In the 2009 and 2014 ablation season, ground penetrating radar was used to measure the thickness of No.12 glacier at Laohugou glacier in Qilian Mountains, The topography, the thickness data of the streamline and cross-sections along the glacier were obtained, and the distribution characteristics of the thickness and trough valley shape on the middle streamline were studied.The results show that the average thickness of glaciers in the East and West respectively For 190 m and 150 m, the topography of the glaciers in the East Branch is more rugged than that in the West Branch, and the slopes of the branches of the glaciers are moderate. The glaciers in the East and West reaches are 122 m and 157 m thick, respectively, The thickness of the glacier in the central part of the confluence increased to 162 m. There are spatial differences in the shape of the glacier trough, and the shape of the glacier valley in the east and west branches is similar to the symmetrical V-shape. However, in the glacier convergence area, Slope becomes slow, the development of asymmetric troughs.