【摘要】 利用1970年左右地形图和1995、1999、2002年及2006年的Landsat-TM/ETM+遥感影像,在地理信息系统技术支持下,提取冰川边界,对祁连山疏勒南山地区的冰川变化进行研究.结果表明:研究区内的冰川在1990年代变化显著,1995年冰川面积比1970年的减少了5.8%,1999年冰川面积比1995年代的减少了3.0%,2002年冰川面积比1999年减少了1.7%,2006年冰川面积比2002年减少了3.0%.冰川的长度与冰川总面积变化趋势基本一致,且冰川规模越小的冰川变化越显著.对研究区附近气象站1957—2006年年均温和年降水量数据进行对比分析,冰川的变化基本上反映了气候的变化.更多还原

【Abstract】 Glaciers on the Tibetan Plateau play an important role in the earth’s climate system.Regular survey of glacier change is almost impossible in most parts of the Tibetan Plateau.Remote sensing is a primary technique and becomes the only means in many places.GIS provides an efficient tool to analyze the status and the change of glaciers.In the paper,the Shulenan Mountain is selected as a test area.Glacier variation in the 1970s,1995,1999,2002 and 2006 were analyzed by means of satellite image and topographical map.The results indicate that the glacierized area had decreased about 5.8% from 1970 to 1995 and had decreased about 3.0% from 1995 to 1999.The glacierized area in 2002 had decreased about 1.7% compared with that in 1999,and the glacierized area in 2006 had decreased about 3.0% compared with that in 2002.Analyzing the annual mean temperature and precipitation of Tuole Station from 1957 to 2006,some evidence of glacier change are found.更多还原