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《Journal of Glaciolgy and Geocryology》 2002-05
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Surface Velocity on the Glacier No. 51 at Haxilegen of the Kuytun River, Tianshan Mountains

JING Zhe\|fan,\ YE Bai\|sheng,\ JIAO Ke\|qin,\ YANG Hui\|an (Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China)  
The Glacier No. 51 is located at the headwaters of the Kuyntun River in the Tianshan mountains, with an area of about 1\^48 km~ 2 and the largest length of about 1\^7 km, of which the ELA ranges from \{3 400\} to \{4 000\} m a. s. l. The flow velocities of the glacier have been surveyed since 1999 by using GPS and traditional technique. The surface velocities were determinate over a period of two years (1999-2001). The largest surface velocity was 3\^15 m\5a~ -1. Velocity vectors appear the flow characteristics of a valley glacier. Positional variation of glacier terminus was obtained by comparing maps of 1∶50 000 and field observations from 1964 to 1999. It was found that the terminus of the glacier has retreated by about 49 m, with an average rate of 1\^4 m\5a~ -1, in the period. It retreated 10\^03 m from Aug. 1999 to Aug. 2001, with an average rate of 5.0 m\5a~ -1, showing an intensified retreat.
【Fund】: 中国科学院寒区旱区环境与工程研究所知识创新工程项目 (CACX2 10 0 17);; 中国科学院天山冰川观测试验站基金项目(F2 0 0 10 6)
【CateGory Index】: P343.6
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