【摘要】 以西藏朋曲流域为例,利用1970年代中国冰川编目数据、2000/2001年ASTER遥感影像及数字高程模型,得到研究区两期冰川分布图,在GIS支持下统计分析冰川变化趋势.结果表明:近30a流域内冰川数量减少10%,面积退缩9%,冰储量减少8 4%;通过对不同规模的冰川分析,再次证实小冰川对气候变化更为敏感.更多还原

【Abstract】 To study the glacier variation in response to climate warming, the Pumqu Basin located in Tibet Autonomous Region was selected as the test area. The glacier outlines on the topographic maps in the 1970s were digitized. Then, 18 scenes of Advanced Space borne Thermal Emission and Reflection Radiometer images and 2 China-Brazil Earth Resources Satellite images were manually interpreted to derive new glacier distribution. The information for the new glacier inventory was obtained by the aid of high-resolution digital elevation model. The general trend of glacier variation in the recent 30 years was analyzed and computed supported by GIS. The result shows that the total glacier area in Pumqu Basin has decreased by 9% and the ice reserve has reduced by 8’4%. It is also confirmed that small glaciers are more sensitive to climate change.更多还原