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Monitoring Intra-annual Spatiotemporal Changes in Urban Heat Islands in 1449 Cities in China Based on Remote Sensing

查看全文 作　　者：LI [1,2,3]Yuanzheng;WANG [4]Lan;ZHANG [5]Liping;LIU [1,3]Min;ZHAO [6]Guosong 高影响力作者 机构地区：[1]School of Resources and Environment,Henan University of Economics and Law,Zhengzhou 450046,China;[2]Academician Laboratory for Urban and Rural Spatial Data Mining of Henan Province,Henan University of Economics and Law,Zhengzhou 450046,China;[3]State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;[4]Key Laboratory of Urban Environment and Health,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China;[5]Center for Environmental Zoning,Chinese Academy for Environmental Planning,Ministry of Environmental Protection of China,Beijing 100012,China;[6]Key Laboratory of Land Surface Pattern and Simulation,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101高影响力机构 出　　处：《Chinese Geographical Science》索引2019年第29卷第6期,共12页高影响力期刊 基　　金：Under the auspices of National Natural Science Foundation of China(No.41901238,41701501);Social Science Fund of China(General Projects)(No.17BJL065);Key Scientific and Technological Project of Henan Province(No.192102310003);Educational Commission of Henan Province(No.2019-ZZJH-094) 摘　　要：This study aimed to accurately study the intra-annual spatiotemporal variation in the surface urban heat island intensities(SUHIIs) in 1449 cities in China.First, China was divided into five environmental regions.Then, the SUHIIs were accurately calculated based on the modified definitions of the city extents and their corresponding nearby rural areas.Finally, we explored the spatiotemporal variation of the mean, maximum, and minimum values, and ranges of SUHIIs from several aspects.The results showed that larger annual mean daytime SUHIIs occurred in hot-humid South China and cold-humid northeastern China, and the smallest occurred in arid and semiarid west China.The seasonal order of the SUHIIs was summer > spring > autumn > winter in all the temperate regions except west China.The SUHIIs were obviously larger during the rainy season than the dry season in the tropical region.Nevertheless, significant differences were not observed between the two seasons within the rainy or dry periods.During the daytime, the maximum SUHIIs mostly occurred in summer in each region, while the minimum occurred in winter.A few cold island phenomena existed during the nighttime.The maximum SUHIIs were generally significantly positively correlated with the minimum SUHIIs during the daytime, nighttime and all-day in all environmental regions throughout the year and the four seasons.Moreover, significant correlation scarcely existed between the daytime and nighttime ranges of the SUHIIs.In addition, the daytime SUHIIs were also insignificantly correlated with the nighttime SUHIIs in half of the cases. 关 键 词：SURFACE urban heat ISLAND intensities(SUHIIs) land SURFACE temperature(LST) SEASONAL changes maximum and minimum SUHII cold ISLAND China
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