武汉区域百年地表气温变化趋势研究

考虑气温序列的非均一性,并对缺测数据进行合理插补,建立武汉区域1905~2005年、季3项气温序列。序列结果表明,100a来年均气温、年均最低气温均呈上升趋势,增温速率分别为0.014℃/10a和0.026℃/10a;年平均最高气温变化呈现微弱的下降趋势,变化速率为-0.003℃/10a,表明百年来武汉区域夜间增温趋势比较明显,白天气温变化不大;年平均最高气温与最低气温的变化具有不对称性。年平均气温、年平均最高气温存在两个暖期,时段为1920~1940年、1990~2005年,第一个暖期主要是夏、秋季气温偏高,冬、春季不明显,热在白天;第二个暖期则四季气温均偏高,冬、春季最明显,夏季较弱,暖在夜间。

Surface Air Temperature Change of Last 100 Years over Wuhan Region

Taking into account the non-uniformity of the temperature sequence, the annual and seasonal temperature series over Wuhan region during 1905-2005 were established through a reasonable interpolation. The results showed that annual mean temperature and annual mean minimum temperature had showed an upward trend with rates of 0.014℃/10a and 0.026℃/10a since 1905, whereas the annual mean maximum temperature was a weak downward trend with a rate of -0.003℃/10a.All these indicated that a warming trend over Wuhan region was more visible at night, yet little during daytime, and that the annual mean maximum temperature and mean minimum temperature had showed an asymmetric trend. The annual mean temperature and the annual mean maximum temperature had two warm times, which were 1920s-1940s and 1990s up to the present. The summer and autumn temperature were higher during the first warm period, but the winter and spring were not obvious, moreover high temperature occurred in daytime. The four-season temperature was higher during the second period, the winter and spring were most obvious, but the summer was weak, moreover warm at night.