The response of seasonal snow accumulation to the global warming in Kong-Bingdou basin during the past 30 years

Based on data of Kong-Bingdou meteorological station in Urumqi River basin for the period of 1987-2014 and the seasonal snow cover data of 1987-1993 /2006-2007 /2014-2015 of the Kong-Bingdou observations,we analyzed the relationships between the thickness of snow in the region,the number of days of snow cover variation and the temperature and precipitation. The results showed that: 1) In the snow stable periods,temperature and precipitation increased generally,and this trends occurred mainly in the spring. 2) The stable snow cover duration was decreasing significantly. The maximum depth of snow occurred at an altitude of 3865m;below the altitude,the snow depth showed rising trend with elevation rise,and above the altitude 3865 m,it was opposite. 3) In the snow stable period,the impact of precipitation on maximum snow depth was far greater than other meteorological factors such as temperature.