Recent Progress in Researches of the Impact of Winter and Spring Snow Cover on the Asian Summer Monsoon Precipitation in the Tibetan Plateau

The snow cover on the Tibetan Plateau has obvious seasonal,interannual and interdecadal changes,and is one of the most important factors which control the Asian summer monsoon precipitation.The abnormal winter and spring snow cover over the Tibetan Plateau can affect the atmospheric circulation and Asian summer monsoon precipitation in terms of changing ground surface albedo,temperature and thermal condition,absorbing heat and increasing the soil moisture through melting process at the end of spring.The progress in statistical studies,climate dynamics and model simulations of the impact of winter and spring snow cover in Tibetan Plateau on the Asian monsoon precipitation is summarized.The possibly effective physical mechanism is proposed.The future work is also discussed and prospected.