喀喇昆仑山克勒青河谷近年来发现有跃动冰川  

Surging Glacier Found in Shaksgam River,Karakorum Mountains

作　　者：上官冬辉[1] 刘时银[1] 丁永建[1] 丁良福[1] 沈永平[1] 鲁安新[1] 李刚[1] 张勇[1] 谢昌卫[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《冰川冻土》2005年第5期641-644,共4页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金项目(9020201340371026);中国科学院知识创新工程项目(KZCX3-SW-339-03)资助

摘　　要：根据冰川编目、Landsat MSS/TM/ETM+影像和相关的历史考察制图,利用GIS进行了不同时期的冰川分布图的制作,对比分析了不同时期冰川范围.重点监测了喀喇昆仑山北坡克勒青河的5Y654D48、5Y654D97的不同时段内的冰川运动状况.结果发现:5Y654D48冰川和5Y654D97冰川分别在1990-2000年与1977-1990年间运动速度达272 m·a-1,213.1 m·a-1,比其它时段运动速度大7～20倍,具备跃动冰川的运动特征.分析认为,5Y654D48冰川在1990-2000年、5Y654D97在1977-1990年间曾分别发生过冰川跃动.There is little information about Glacier surging in China. In this paper, the Chinese Glacier Inventory, Landsat MSS/TM/ETM^＋ and historical map are used to obtain the extent of Glaciers 5Y654D48 and 5Y654D97, which are located in the Shaksgam River in Karakorum Mountains, in 1968/1976, 1977, 1990 and 2000/2001. Acomparative analysis for the glacier extent was employed to discuss the annual flow velocity of the two glaciers. The velocity for the Glacier 5Y654D48 was 272 m·a^-1 during 1990-2000, and for the Glacier 5Y654D497 was 213 m·a^-1 during 1977-1990, respectively. They were 7-20 times the annual mean velocities of the two glaciers in other periods. It is found from the abnormal ice flow velocity that the Glacier 5Y654D48 was surging during 1990-2000 and the Glacier 5Y654D97 was surging during 1977-1990.

关 键 词：跃动冰川 克勒青河 LANDSAT GLIMS 

分 类 号：P343.6[天文地球—水文科学]