Abstract:Using observed micro-meteorological data of two snowfall processes in Gande of Qinghai Province, the snow depth, snow density, ice content in snow, water content in snow and snow surface temperature are discussed, and the relationships between surface albedo and snow density, ice content in snow, water content in snow are analyzed. Besides, the influence of accumulated snow on air temperature gradient, relative humidity gradient and wind speed gradient of snow cover are also analyzed. The results show that surface albedo increases obviously while ground is covered by snow. Albedo can be 0.8-0.9 at noon after snowfall. Albedo reduces along with snow melting. Snow albedo is positively related with snow density and ice content in snow and negatively related with water content in snow. Snow cover reduces absolute value of air temperature gradient. The absolute value of relative humidity gradient gets lower at dawn and higher at noon. Snow cover has no effect on wind speed gradient.