中国春季降水异常的相似性分析

Similarity Analysis of Spring Precipitation Anomalies in China

利用王盘兴等在2011年提出的站网均匀化订正方案对中国160站站网上1955—2014年春季月平均降水资料进行订正,并对订正前、后的降水异常场序列求全国平均值。在求得订正前后的降水异常偏差场后分别计算相似系数,分析降水异常偏差场的相似性,分别从未经过站网均匀化订正和经过站网均匀化订正的异常偏差场中找出最相似的几对,讨论均匀化订正对相似性的影响,得出的结果证实了站网均匀化能够更合理地反映出相似形势。

This paper discusses a better method to correct the climate data--the station network homogenization correction scheme proposed by Wang Panxing et al.In 2011.This scheme is used to correct the spring average precipitation data of China's 160 station network from 1955 to 2014,and calculate the national average value of the precipitation anomaly field sequence before and after the correction.The similarity coefficients are calculated respectively after the corrected and corrected precipitation anomaly deviation fields are obtained,The most similar pairs are found out from the anomalous deviation fields which have not been corrected by station network homogenization or by station network homogenization correction.The influence of homogenization correction on the similarity is discussed.The results show that the station network homogenization can reflect the similar situation more reasonably.