Analysis on Change of Atmospheric Temperature in Xinzheng City during 1961 to 2010

The monthly variation,decadal variation,annual variation and seasonal variation during 1961 to 2010 in Xinzheng City were analyzed in this paper.Meanwhile,the contribution rate of season for the change trend of average temperature was analyzed by mid-EOF method.The result showed that in Xinzheng City,the hottest month appeared in July,the most coldest month appeared in January.In lates 50 years,the average temperatures continues to drop from 1960s to 1980s,the most cold period appeared in the 1980s,a significant rise began in the 1990s.The trends of change of four seasons are complex.Winter,spring and autumn showed increasing trend,summer was reduced tendency.The main increasing trend in winter is the main factors of the annual average temperature half a century.