1961—2010年新郑市气温变化特征分析

利用新郑市1961—2010年的气温资料,分别对气温的月际变化、年代际变化、年际变化和季节变化进行了分析,并用EOF法对50年年平均温度变化趋势的季节贡献率进行了分析。结果显示:新郑市年内最热月份出现在7月,最冷月份出现在1月;50年来年平均气温从20世纪60—80年代持续降低,最冷期出现在80年代,90年代开始气温显著升高。冬季、春季和秋季呈逐年升高趋势,夏季则呈降低趋势;冬季主要的增温趋势是主导1961—2010年年平均增温的最主要的因素。

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.