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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.
Using the topographic maps of 1970 and Landsat-TM / ETM + remote sensing images in 1995, 1999, 2002 and 2006, the glacier boundaries were extracted and the glacier changes in Shule Nanshan area of Qilian Mountains were studied with the support of GIS technology. It shows that the glaciers in the study area changed significantly in the 1990s, with the area of glaciers dropping by 5.8% from that in 1970 and that of glaciers in 1999 being decreased by 3.0% compared with that of the 1995s. The area of glaciers in 2002 dropped by 1.7% , And the area of glacier decreased by 3.0% in 2006 compared with that in 2002. The length of glacier is basically the same with the change of the total area of glacier, and the glacier change with the smaller glacier is more significant.The average temperature of the meteorological station in 1957-2006 Precipitation data for comparative analysis, the changes in glaciers basically reflect the climate change.