开封市近55a气温变化特征分析

利用开封市1951-2005年气温资料,分析了开封市近55 a气温变化特征,结果表明:开封市总体气温变化呈上升趋势,与全球气候变化基本一致;年平均气温前期10 a较低,中期30 a保持稳定,后期15 a明显上升;夏季气温相对稳定,春、秋和冬季气温升高,冬季气温升高尤明显;1-4月及10-12月气温升高,5、8、9月气温相对稳定,6、7月气温略有下降。年极端最高气温明显下降,年平均最高气温保持稳定,年极端最低气温和年平均最低气温都明显升高。极端气温事件减少,发生程度降低。

Analysis of Air Temperature Change Characteristic in Recent 55 a in Kaifeng

Based on air temperature data from 1951 to 2005,the paper analyzes air temperature change characteristic in recent 55 a in Kaifeng.The results show air temperature change is on the rise as a whole,which is consistent with global climatologic change.The mean annual temperature is lower in the first decade,stable in the next 30a,ascent in the last 15 a.The air temperature is relative stable in summer;and is ascending in spring,autumn and winter,especially in winter.The air temperature is ascending from January to April and October to December;and is relative stable in May,August and September;and is falling slightly in June and July.The annual extreme maximum temperature is obviously falling;and the annual mean maximum temperature keeps stable;the annual extreme minimum temperature and annual mean minimum temperature is obviously ascending. The extreme air temperature event reduces and occurrence degree gets down.