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《Meteorological Science and Technology》 2015-05
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Comparative Analysis of Urban and Rural Climate Comfortabilities in Beijing in Past 30 Years

Fang Xiaoyi;Li Lei;Du Wupeng;Dang Bing;Cheng Chen;Shu Wenjun;Beijing Municipal Climate Center,Beijing Meteorological Service;Shenzhen National Climate Observatory;Shenzhen Key Laboratory of Severe Weather in Southern China;  
Based on the meteorological data of 20 stations in Beijing form 1981 to 2010,the daily comfort indexes in 20 stations and the annual averages of warmest and coldest comfort indexes in urban and rural areas are calculated,as well as hot days,extreme hot days,cold days and severe cold days.The time and spatial variation characteristics of comfort indexes in urban and rural sites are analyzed,and the differences between urban and rural comfort indexes are compared.The results show that in the 1980 s,there was no obvious difference between urban and rural sites in the warmest comfort index under the hot standard;however,since the 1990 s,the summer comfort was warming obviously,and hot days and extreme hot days increased significantly,especially in the plain area.The spatial distribution of hot days and extreme hot days constantly extended,which extended to the most part of the urban area except for the eastern Chaoyang district after 2000.The warming magnitude was larger in urban areas than in rural areas,and it was warmer in plain areas than in mountain areas.The winters were warmer in Urban areas than in rural areas,and cold days and severe cold days were also less in the urban areas than in rural areas.The gap became obvious gradually from the mid and late 1980 s,and the biggest gap can be up to 10 to 20days in a year.The severe cold area reduced since the 1990 s,and the cold days reduced 10 days compared with the 1980 s.
【Fund】: 北京市科技计划项目(Z131106003513009);; 北京市气象局城市气候评估创新团队建设计划;; 国家自然科学基金项目(41105103);; 国家气象公益性行业科研专项(201106032)资助
【CateGory Index】: P463.3
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