东北地区平均温度和降水的时空演变

采用东北地区41个代表站1958-2001年历年逐日降水和平均温度资料,采用EOF分析方法对该地区的年平均温度和年降水量进行时空分布特征分析。得到结果:在降水和温度空间分布上存在着全区一致的特征,但也存在着东西、南北间的差异。降水不存在明显的变化周期,20世纪70年代降水最少。温度存在着3￣4年的变化周期,在20世纪80年代末期后存在明显的温度正距平。

Analysis of Precipitation and Temperature Distribution of Northeast China

EOF method is used to analyse temperature and precipitation of Northeast China in this article.the date from 1958 to 2001 are from 41 surface station of Northeast China.The results indicate that: the loading vector field could reflect whole anomaly structures of year temperature and precipitation in northeast.The precipitation in Northeast China don't have periodic variations,the less precipitation is the 1970's.The temperature in Northeast China have about 3-4 years periodic variations,the temperature increase in northeast China is obvious from the end 1980's.