Effects of site change and urbanisation in the Beijing temperature series 1977–2006

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• 作者：Zhongwei YanZhen LiQingxiang liPhil Jones
• 会议时间：2011-11-01
• 关键词：inhomogeneity ; daily temperature series ; site-change effect ; urbanisation ; climate trend
• 作者单位：Zhongwei Yan(Key Laboratory of Regional Climate-Environment in Temperate East Asia,Institute of Atmospheric Physics,Beijing 100029,China)Zhen Li(Key Laboratory of Regional Climate-Environment in Temperate East Asia,Institute of Atmospheric Physics,Beijing 100029,China Graduate University of Chinese Academy of Sciences,Beijing 100049,China)Qingxiang li(National Meteorological Centre,China Meteorological Administration,Beijing 10008,China)Phil Jones(Climatic Research Unit,University of East Anglia,Norwich NR4 7TJ,UK)
• 母体文献：2011年第二十八届中国气象学会年会论文集
• 会议名称：2011年第二十八届中国气象学会年会
• 会议地点：厦门
• 主办单位：中国气象学会
• 语种：chi
• 分类号：TN1;TH2

摘要

During 19771981 the Beijing (BJ) meteorological station was at a suburban location. In 1981 it was moved to a more urban location, but in 1997 it was subsequently moved back to the same suburban location. The daily BJ temperature series, together with those from 18 nearby stations, form a unique database for studying how site-change and possible urbanisation influences affect climate changes at a local scale. The site-change-induced biases were quantified, between 0.43 and 0.95 C, based on comparisons between multi-year-mean seasonal temperature anomalies at BJ and the mean of those from a cluster of nearby stations. The annual mean urban-suburban difference was 0.81 C around 1981 and 0.69 C around 1997, indicating a growing urbanisation effect in the suburban compared to the downtown area. The linear warming trend in the adjusted (for site moves only) BJ temperature series during 19772006 was 0.78 C/decade. Comparing with several rural and less-urban sites, we suggest that the BJ records include an urbanisation-related warming bias between 0.20 and 0.54 C/decade, likely about 0.30 C/decade, for the recent few decades. The climatic warming at BJ between 1977 and 2006 is likely, therefore, to be about 0.48 C/decade. Caveats for using these estimates were discussed.