国土资源遥感2013，Vol.25Issue(1)：117-122,6.DOI:10.6046/gtzyyg.2013.01.21
中心城区地表温度空间分布及地物降温效应——以南京市为例
Spatial distribution of land surface temperature in central city proper and the cooling of objects effect: A case study of Nanjing
摘要
Abstract
By using TM imagery as the raw data in this paper, the authors first classified the objects of the study area into three classes, i. e. , impervious surface (IS) , vegetation, and water based on the algorithm of OTSU, and retrieved land surface temperature (LST) of the study area by using the mono -window algorithm. Then, the study area was separated into 45 pieces by setting a multi - level buffer in a discriminating scheme, which was based on the distance between each pixel and the center of Nanjing, and the work of statistics and analysis was carried out for the mean temperature of all pixels, the mean temperature of IS, the mean temperature of vegetation, and the mean temperature of water in each buffer. Finally, the authors set up the relational models between LST and the area ratio of IS, LST and the area ratio of vegetation, LST and the area ratio of water. The results showed that the land surface temperature decreased obviously with the increasing distance from the city' s center. Vegetation and water could reduce the temperature in central city proper, and the cooling effect of water is 2.43 times that of vegetation. The integrated relational model between LST and the area ratio of IS, the area ratio of vegetation and the area ratio of water was performed well.关键词
城市热岛/中心城区/地表温度/空间分布/降温效应Key words
urban heat island/ central city proper/ land surface temperature/ spatial distribution/ cooling effect分类
信息技术与安全科学引用本文复制引用
刘东,李艳,孔繁花..中心城区地表温度空间分布及地物降温效应——以南京市为例[J].国土资源遥感,2013,25(1):117-122,6.基金项目
863重点项目子课题"地表覆盖数据在陆面生态水文模型中的应用示范及示范系统开发"(编号:2009AA122005)及"生态系统固碳现状、速率、机制和潜力"项目(编号:XDA05050106)共同资助. （编号:2009AA122005）
