东北地区雪盖与夏季降水的相关分析

Correlation Analyses between Snow-cover and Summer Precipitation in Northeast of China

利用Tetra卫星MODIS资料提取了东北地区2000～2005年冬季的积雪覆盖信息，得到了近5年的积雪覆盖状况和变化特征。依照雪盖时间序列图分析了各年份冬季冷空气强度及变化和次年春季融雪状况，可以作为研究区域性积雪对气候反馈的依据。同时分析了东北地区冬季积雪覆盖率与次年吉林市夏季降水的关系。研究中发现：冬季的积雪覆盖率与次年夏季降水呈明显的负相关。

The snow cover data in northeast China during 2000 -2005 winter is obtained from Terra MODIS data in this study. The characteristics in win- ter in northeastern China are analyzed from the snow-cover data set. It is studied the changes of cold mass in 2000 - 2005 winter and the snowmelt in next spting, it can be validated for the climate response. Correlation between snow cover in winter in northeast China and precipitation in Jilin City in next summer is studied and can be summarized as follows： a significant negative correlation exists between the winter snow cover and the next summer precipitation.