摘要
基于多时相陆地卫星影像和DEM数据,利用遥感(RS)和地理信息系统(GIS)技术,提取了林芝地区的冰川信息,并对区域内的冰川变化进行了分析.结果表明:林芝地区1990—2000年间冰川总面积减少了568.71km2,平均退缩率56.87km2.a-1;经对典型冰川区110余条冰川监测数据显示,10a间冰川有前进、有退缩,但以退缩为主,总体退缩172.65m,年均退缩17.27m.
Based on remote sensing and geographical information systems techniques,using multi-periods of Landsat image and Digital Elevation Model,the glaciers of Nyingchi Municipality in Tibet Autonomous Region are mapped and the variation of glaciers during 1990—2000 are studied in this paper.Result shows that glacierized area decreased about 568.71 km2,with an average retreat rate of 56.87 km2·a-1 from 1990 to 2000.Studying the representative glaciers shows that some glaciers were increasing and some were decreasing,with the principal tendency of retreating.Studying the variation of representative glaciers＇ terminus indicates that glaciers terminus shrunk about 172.65 m during 1990—2000,with an average retreating rate of 17.27 m·a-1.
出处
《冰川冻土》
CSCD
北大核心
2011年第1期14-20,共7页
Journal of Glaciology and Geocryology
基金
西藏林芝地区冰川泥石流灾害监测预警工程项目(藏国土资2007136)资助
关键词
林芝地区
冰川变化
遥感
陆地卫星
Nyingchi Municipality
variation of glaciers
remote sensing
Landsat
