1972-2007年祁连山东段冷龙岭现代冰川变化研究  

Glacier Variation in the Lenglongling Range of Eastern Qilian Mountains from 1972 to 2007

作　　者：曹泊[1] 潘保田[1] 高红山[1] 姜少飞[1] 温煜华[1] 上官冬辉[2] 

机构地区：[1]兰州大学西部环境教育部重点实验室,甘肃兰州730000 [2]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》2010年第2期242-248,共7页Journal of Glaciology and Geocryology

基　　金：国家杰出青年科学基金项目(40925001);科技基础性工作专项资金项目(2006FY110200);甘肃省科技支撑计划项目(0708NKCA122);国家创新研究群体科学基金项目(40721061)资助

摘　　要：利用1972年绘制的地形图,1994年Landsat TM遥感影像,2000年中巴遥感影像和2007年获取的ASTER遥感影像为数据源,通过遥感图像处理技术和人工解译对祁连山东段冷龙岭冰川进行研究,分别得到1972年,1994年,2000年和2007年冷龙岭区冰川边界并绘制冰川边界图,进而分析了该区近年来的冰川变化.结果表明:1972-2007年近35a以来冷龙岭冰川全部处于退缩状态,有27条冰川消失,冰川面积减少了23.6%;有后期加速趋势的特征,南坡比北坡退缩幅度要大.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.

关 键 词：冷龙岭 冰川变化 地理信息系统 遥感 

分 类 号：P343.6[天文地球—水文科学]