Glacier albedo is the link between the energy and mass balance on the surface,which is determines the amount of glacier mass ablation. In this paper,96-sence Landsat8 OLI multi-spectral remote sensing from 2013 to 2020 are used to derive the time series albedo results in the Dongkemadi Gla-cier Tanggula Mountains based on topographic correction,at-mospheric correction and reflectance conversion to albedo. It is found that:① Glacier albedo has obvious correlation with the altitude,and albedo increases with altitude;②During the period of 2013-2020,albedo of glacier appeared a slight de-creasing trend with a rate of −0.0004/10 a. Combined with the temperature and precipitation data observed by meteoro-logical station in the same period,the analysis shows that the decrease of albedo of Dongkemadi Glacier is mainly caused by temperature rise(glacier albedo and temperature are negative-ly related). In addition,under the joint influence of tempera-ture and precipitation,the annual variation of the albedo Dong-kemadi Glacier is as follows:it continues to decrease from January to August,and increases rapidly from September to December.
关键词
冬克玛底冰川/Landsat/8/反照率/时空变化特征
Key words
Dongkemadi Glacier/Landsat8/albedo/temporal and spatial variation characteristic
万方数据