【摘要】 以帕米尔东缘的慕士塔格公格尔山为试验区,利用2001年ASTER遥感数据,综合空间锐化增强处理、比值图像取阀值和目视判读等提取冰川边界;利用ASTER的同轨立体像对提取DEM,区分表碛覆盖的冰川范围;自动、半自动和人工量算冰川的有关参数,进行冰川解译和新的冰川目录编制.与中国冰川编目数据对比分析,1962/1966—2001年间研究区冰川面积退缩了67.89km2,占总面积的(6.2±1.0)%.结果表明,运用高分辨率的ASTER遥感资料可快速、直观地实现基于GIS的冰川编目,方便地观测冰川的动态变化,从而节约冰川编目和观测冰川变化的时间和经费,在实践上具有很大的优势.更多还原

【Abstract】 The Glacier inventory of China is the basal data for studying glacier changes. An update of The Glacier inventory of China is necessary, because glaciers in the Northwest China have undergone visible changes under climate warming during the past decades. In this study, the ASTER images are used to investigate the glacier changes in the Muztag Ata and Kongur Tagh. The methods of Crisp, Threshold of a ratio image from ASTER band 3/band 4 and manual interpretation are used to map glacier extent and discriminate glacier zones. The debris-covered glacier zone is classified by overlay DEM and images. The parameters are calculated with semi-automatic and manual approaches to compile the glacier inventory. A comparative analysis performed for glacier area shows that there was area shrinkage of 67 ^89 km 2 from 1962/1966 to 2001, accounting for about 6 ^2±1 ^0% of total area. It is demonstrated that it is possible to monitor the dynamic changes of glaciers expediently and rapidly, and to reveal effectively the characteristics of glacier changes by using RS and GIS.更多还原