郑州50年来的气温变化及城市化对其贡献率

利用郑州1951年以来的气温记录，采用统计方法和最小二乘法分析了郑州的气温变化特征。计算了气温变化的幅度．用孟津1961年以来气温变化与郑州作对比，并用两地增温率对比计算城市化对郑州城市气温变化的贡献率．结果显示1951年以来郑州市年平均气温变化总趋势是不断变暖，气温升高幅度约0．23℃／10年，年平均最低气温及春冬季节气温升温幅度最大，夏季气温却有降温趋势．1961年以来郑州年平均气温的城市化增温率为0．064℃／10年，城市化增温对郑州城市气温增加的贡献率为25％．郑州1951年以来气温的变化还主要是受区域背景气候的影响；受城市化影响在夏季最明显．

Air Temperature Change and Contribution Ratio of Urbanization in Zhengzhou City for Recent 50 Years

Analyzed the characteristics of Zhengzhou city by the temperature data of the Zhengzhou station since 1951, calculated the rate of air temperature change using least square method. Compare the air temperature of Zhengzhou City with that of Mengjin since 1961, and comparatively calcutated the contribution ratio of urbanization to Zhengzhou City by rate temperature change in the two areas. The results showed that the annual average temperature of Zhengzhou City was warming at a rate of about 0.23℃/10 years since 1951, the minimum temperature and the temperatures of winter and spring increased at the fastest rate, but the summer temperature was cooling. Attempted to assess contribution ratio of urbanization by the method of comparison between the urban and suburban＇ s temperature. It turned out that urbanization led the annual average temperature in Zhengzhou City warming at a rate of 0. 064/10 years and its contribution ratio was 25% to warming temperature of Zhengzhou City. Temperature change was mainly due to the climate of regional context, but it was affected the most obviously by urbanization in the summer.