摘要
奎屯河哈希勒根 5 1号冰川位于新疆奎屯市以南的天山依连哈比尔尕山北坡 ,奎屯河上游支沟哈希勒根河源区 .1999年 8月 ,在该冰川上布设了用于冰川运动和冰川物质平衡观测研究的测杆 18根 ,并进行了冰川表面运动、冰川物质平衡和冰川末端变化的首次观测 .根据 2 0 0 0年 8月和 2 0 0 1年 8月的冰川运动观测资料 ,分析了奎屯河哈希勒根 5 1号冰川的运动特征和冰舌末端的变化状况 .结果表明 :奎屯河 5 1号冰川应属于亚大陆型冰川 ;1999/ 2 0 0 0年度和 2 0 0 0 / 2 0 0 1年度的表面运动值不大 ,最大流速点的年运动速度为 3 15m·a-1;运动速度垂直分量UZ的变化规律同乌鲁木齐河源 1号冰川的变化规律相同 ,即消融区的显出流作用和积累区的显入流作用 .该冰川的冰舌末端处于相对稳定的退缩状态 ,196 4— 1999年间平均退缩量约为 1 4m·a-1,而 1999— 2 0 0 1年间的平均退缩量为 5 0m·a-1,反映出冰川退缩增大的趋势 .
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.
出处
《冰川冻土》
CSCD
北大核心
2002年第5期563-566,共4页
Journal of Glaciology and Geocryology
基金
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)
