亚洲高山区冰川运动特征及影响因素
摘要
Under climate change, glacier movement controls mass transport changes, which further leads to the response of changes in glacier length, area and thickness.However, there are differences on response time and degree for glaciers in different scales and types.For further understanding the mechanism of heterogeneous glacier changes, the spatial and temporal characteristics of glacier movement in the High Mountain Asia were analyzed by using ITS_LIVE glacier velocity data.And the influencing factors of glacier movement, glacier velocity change were analysed by Geodetector and correlation analysis.The results are as follows: The characteristic values of glacier movement are larger in the southeastern Tibetan Plateau and the Hindu Kush, but smaller in the West Kunlun, the eastern Tianshan and the eastern Tibetan Plateau.Most glaciers in the High Mountain Asia were slowing down during 2000 -2016.Glaciers in Hengduan and Nianqentanglha Mountains decelerate most dramatically.In contrast, West Kunlun experience slightly accelerated glacier movement.Glacier movement is mainly controlled by glacier length and area (thickness), as well as terrain and climate factors.The change of glacier mass balance or thickness is the most important reason for glacier movement change.