城市化进程对中国东北部气温增暖的贡献检测

Impact of Urbanization on Surface Air Temperature Warming in Northeast China

作者采用中国均一化历史气温数据集(CHHT),从1954—2005年、1979—2005年两个时间段,通过对比分析中国东北部区域城—乡台站气温序列的变化趋势,分离出城市热岛的影响,进而就城市热岛对中国气温增暖的贡献程度进行检测。结果表明,近50多年来,中国东北部气温增暖显著,区域年平均最低、平均、最高气温分别约上升了2.11℃、1.59℃、1.13℃。对此,城市热岛的贡献程度,无论是1954年以来还是1979年以来均很小,即使影响最为显著的年/冬季平均最低气温,对其贡献也均不到5%。

Based on China Homogenized Historical Temperature Datasets,it presents evidence for urban heat island（UHI） effects on regional temperature on a long-term scale in Northeast China,which were estimated by comparing trends of urban-rural temperature series covering two time periods of 1954-2005 and 1979-2005,respectively.Results indicate that the warming trend in Northeast China over the last 50 years is significant,and the magnitude increased for the annual mean minimum temperature is the largest （2.11℃）,followed by the annual mean temperature（1.59℃）,while the annual mean maximum temperature （1.13℃） is the smallest in magnitude.But the contribution of UHI is minor whenever from 1954 or 1979 to present,especially for the regional annual and winter minimum temperature,the warming attributed by UHI is only some 5%,which are both impacted mostly.