中文摘要：

高原降水作为一种天气状况且在气候变化中占着特别的地位，因此研究高原降水对多年冻土区地表水热特征的影响具有重要意义。文章利用青藏高原多年冻土区西大滩2007年的气象数据研究了降水对地表能量通量的影响。结果显示：降水日地表净辐射、感热通量均有所降低，且当地表有积雪存在时感热通量降低更加明显。潜热通量在冬春季降水日会明显增大。地表热流在冬春季降雪时热量散失的多少与积雪的厚度有密切关系，夏秋季降水日地表热流均会降低。

英文摘要：

Studying the permafrost surface energy and water budget is great significant to the research on the plateau region .But the energy is largyly influenced by weather condition change .The plateau precipi-tation ,as a kind of weather conditions ,is the special effect on climate change .by using the observation da-ta of meteorology on Qing-hai Xizang plateau Xidatan region in 2007 year , precipitation influences on the ground surface energy fluxes in permafrost region .The results show surface net radiation fluxes decrease and sensible heat fluxes decrease more if the main form of precipitation is snow .Latent heat fluxes in spring and winter obviously increase .The surface ground fluxes decrease in summer and autumn and the loss of surface ground fluxes have the close relationship with the snow depth .