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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

DOI: 10.6046/gtzyyg.2013.01.21, PP. 117-122

Keywords: 城市热岛,中心城区,地表温度,空间分布,降温效应

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Abstract:

基于TM图像,采用灰度图像分割算法,自动提取南京市中心城区的不透水面、植被及水体;并用单窗算法反演了地表温度;依据离市中心的距离将中心城区分为45级缓冲区,依次统计分析每一级缓冲区内的平均温度、不透水面温度、植被温度、水体温度及各类地物的面积比例等;建立了地表温度与不透水面比例、植被比例、水体比例之间的关系模型。研究结果表明:随离市中心距离的增大,地表温度降低;植被、水体具有降温效应,水体的降温效应是植被的2.43倍;地表温度与不透水面比例、植被比例、水体比例的综合关系模型模拟效果较好。

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