Remote sensing monitoring of the glacier change in the Gangrigabu Range,southeast Tibetan Plateau from 1980 through 2015
WU Kunpeng;LIU Shiyin;BAO Weijia;WANG Rongjun;State Key Laboratory of Cryospheric Sciences,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences;University of Chinese Academy of Sciences;
Researches reveal that most glacier around the globe have retreated due to climate warming in recent decades. In this study,the change of glaciers in the Gangrigabu Range,southeast Tibetan Plateau,was analyzed using the 1: 50 000 topographical maps based on the aerial photos taken in 1980 and the Landsat OLI images in 2015. The following conclusion can be drawn that most glaciers in the Gangrigabu Range were in retreat,where the glacierized area had decreased by 679. 50 km~2,or 24. 91%( 0. 71%·a~(-1)),and the average elevation of glacier terminal had uplifted 111 m. In the study area,there were 10 glaciers advancing,which had experienced a mean advance of 566. 17 m,and other glaciers had retreated 823. 49 m in average. Compared with glacier change in other mountains of China,one can see that the annual average area shrink ratio of glaciers was larger in the Gangrigabu Range,with a maximum annual average length retreat rate,which was one of the regions with strongest glacier shrinkage. There was a close relation between glacier retreat and climate change in the Gangrigabu Range. It is revealed from the records in three meteorological stations in the study area that the average temperature from May to September has increased significantly since 1980,but precipitation from May to September has insignificant change,resulting in glacier fast retreating.