基于Landsat TM影像的长株潭城市群热岛效应研究

Study on heat island effect of Changsha-Zhuzhou-Xiangtan urban agglomeration based on Landsat TM image

基于Landsat TM遥感影像,对长株潭城市群1997—2017年3期遥感影像进行地表温度反演,通过对长株潭城市群热岛强度变化的分析,揭示长株潭城市群热岛的时空演变发展规律。结果表明:从热场空间分布来看,强热岛和极强热岛主要集中分布于长株潭中心城区以及长沙县、浏阳市等。从地表温度变化情况来看,1997—2017年呈现先降低后升高的变化趋势,但总体上呈现下降的变化趋势,其中长沙、株洲、湘潭3个城市中心城区热场呈现增强的趋势。

Based on Landsat TM remote sensing images,the land surface temperature inversion of three remote sensing images from 1997 to 2017 was carried out for the Changsha-Zhuzhou-Xiangtan urban agglomeration.By analyzing the change of heat island intensity in the Changsha-Zhuzhou-Xiangtan urban agglomeration,the spatial-temporal evolution and development law of heat island in the Changsha-Zhuzhou-Xiangtan urban agglomeration was revealed.The results showed that from the spatial distribution of thermal field,the strong and extremely strong heat islands were mainly distributed in the central urban area of Changsha City Zhuzhou City Xiangtan City,Changsha County,and Liuyang City,etc.From 1997 to 2017,the surface temperature showed a trend of first decreasing and then increasing,However,on the whole,the surface temperature showed a downward trend.The thermal field in the central urban areas of Changsha City,Zhuzhou City and Xiangtan City showed an increasing trend.