Glacier Variation in the Lenglongling Range of Eastern Qilian Mountains from 1972 to 2007
Glacier Variation in the Lenglongling Range of Eastern Qilian Mountains from 1972 to 2007
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发表时间：
2010
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通讯作者：
Shangguan Donghui
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作者：
Shangguan Donghui
以东祁连山冷龙岭地区为例，利用1972年地形图、1994年Landsat TM影像、2000年CBERS-2影像和2007年ASTER影像，探索冰川范围的划分方法。只选取暖季无云的遥感影像。利用1972年中国冰川编目（CGI）数字化冰川轮廓线与遥感图像对比，研究了冷龙岭冰川的变化。为了方便有效地从图像中描绘出冰川裸露的范围，使用了ITT可视化信息解决方案（ITT维斯）的交互式数据语言（IDL）程序。结果表明，冷龙岭244条冰川面积减少了12.796 km 2，减少了0。1994 ~ 2000年为5.693 km 2，增长率为1.05%; 2000 ~ 2007年为5.797 km 2，增长率为0.98%。从CGI到2007年，总面积损失约为24.286.km2，占冰川化面积的23.57%（0.67%·a-1）。因此，所有的244个冰川在冷隆山脉正在缩小，27个冰川在2007年消失。南坡冰川退缩速度快于北坡。
The Lenglongling Range of Eastern Qilian Mountains was selected as a sample region to search a method for delineating glacier extent by using Topographic maps of 1972,Landsat TM image of 1994,CBERS-2 image of 2000 and ASTER image of 2007. Only the remote sensing images of warm season and free of clouds were selected. The glacier variation of Lenglong Range was investigated by comparing digitized glacier outlines from the Chinese Glacier Inventory (CGI) surveyed in 1972 and the remote sensing images. For delineating the extent of exposed glacier ice conveniently and efficiently from images,the Interactive Data Language (IDL) program by ITT Visual Information Solutions (ITT VIS) was used. The results show that the area of 244 glaciers in the Lenglong Range decreased by 12.796 km2 or 0. 65%·a-1 from CGI to 1994,by 5.693 km2 or 1.05%·a-1 from 1994 to 2000,and by 5.797 km2 or 0.98%·a-1 from 2000 to 2007. From CGI to 2007,the total area lost was about 24.286·km2,accounting for 23.57% (0.67%·a-1) of the glacierized area. Consequently,all of the 244 glaciers in the Lenglong Range were shrinking,and 27 glaciers disappeared by 2007. The rate of glacier retreat on south slopes was faster then that on the north slopes.