柴达木盆地冰川变化遥感监测

RS-based Monitoring of Glacier Change in Qaidam Basin

采用MODIS标准数据产品中的MCD12Q1数据集对柴达木盆地2001—2012年的冰川面积进行提取、统计、分析,并结合夏季平均气温、年降水量等气象资料分析冰川面积变化的原因。结果表明:柴达木盆地冰川面积总体呈增大趋势,平均增速为85 km2/a;各流域冰川面积也呈增大趋势,那棱郭勒乌图美仁区增大趋势最为明显,平均增速为35km2/a;茫崖和小灶火气象站的夏季平均气温呈略降低趋势,年降水量呈增加趋势,这是冰川面积变化的主要原因。

The area of glacier in Qaidam Basin was extracted,counted up and analyzed based on the MCD12Q1 data from 2001 to 2012,and the reason of change was analyzed combined the climate data. The result shows that the total area of glacier distributes in the mountains a-round Qaidam Basin increases generally,and the average rate is 85 km2/a. Area of glacier in all watersheds increases,and the increasing tendency in Nalengguole-Wutumeiren watershed is the most obvious and the average rate is 35 km2/a. Average summer temperature of Man-gya and Xiaozaohuo weather stations decreases slightly and annual precipitation increases. This is the main reason of the area change of glac-ier.