【摘要】 近年来,由快速城市化过程引起的城市生态环境问题日益突出,热岛效应为最显著的现象之一。本文针对长株潭主城区,采用1994、2000、2006、2010与2015年5个时相的Landsat影像进行地表温度反演,通过热岛强度与等级分析比较了长株潭三市的热岛效应时空演化特征;结合各时相土地利用数据,利用灰色关联模型量化分析了热岛效应时空演化与土地利用变化之间的关系。结果表明:长株潭主城区热岛强度与等级均呈增长趋势;2010与2015年,湘潭市热岛强度大于长沙市与株洲市;建设用地有显著增温效应,而草地、水域与未利用地对强热岛区的降温作用明显。更多还原

【Abstract】 In recent years,the urban ecology environment problems caused by rapid urbanization process become increasingly prominent,among which urban heat island( UHI) effect is one of the most significant phenomena. This paper used Landsat images to retrieval land surface temperature( LST) in Changzhutan main urban area for 1994,2000,2006,2010 and 2015. UHI intensity and grade were used to analyze the spatial-temporal features of UHI in study area. The difference between Changsha,Zhuzhou and Xiangtan was explored as well. With the usage of land use data,the relationship between UHI and land use change was quantified through gray correlation model. Results showed that,the UHI intensity and grade all increased through the period in Changzhutan main urban area. The UHI intensity of Xiangtan performed larger than Changsha and Zhuzhou in 2010 and 2015. Built-up increases LST dramatically while other lands can cool the environment in strong UHI area.更多还原