Based on the air temperature data of Kaifeng National Basic Meteorological Observing Station from 1951 to 2010. using linear trend estimation, accumulative anomaly method and Yamamoto method, the characteristics and tendencies of annual temperature variation were analyzed. The results showed that: in the last 60 years,the annual average temperature in Kaifeng was in upward tendency obviously, and the average rising rate was 0.279 ℃ per 10 years, and significant at 0.05 level.%根据开封国家基本气象站1951-2010年气温观测资料,采用线性倾向估计、累积距平和Yamamoto法,分析了1951-2010年来开封市气温变化特征及其趋势.结果表明:近60年来,开封市年平均气温呈上升趋势,气候倾向率为0.279 ℃/10 a,且达到0.05显著水平.
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