Temporal and Spatial Variation of Surface Albedo of Dongkemadi Glacier Based on Landsat8
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.
Dongkemadi GlacierLandsat8albedotemporal and spatial variation characteristic
万方数据
