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利用TM/ETM+数据,以长沙市为例,反演了地表温度,并针对不同时相的遥感数据,利用城市热岛强度来反映热岛效应强弱的变化。结果表明,长沙市的热岛空间分布与城市建成区的轮廓相吻合。城市热岛的范围随着城市建设、新建开发区以及道路交通网的发展不断增大,且在东南方向为主要增长方向。根据热岛强度鉴别并提取了强热岛区与正常区,发现长沙市强热岛区的面积已经从1993年的13.18km2扩大至2008年的68.16km2。最后,对长沙市热岛未来的发展趋势进行了预测。 更多还原

【Abstract】 In this paper,the land surface temperature is retrieved and helped to calculate the multi-temporal heat island intensity based on Landsat TM/ETM+ data in Changsha city.The results show that the extent of UHI and the built-up area in Changsha city are consistent.The new area of UHI grows rapidly with the development of urban construction,new development zones and road transport network mainly in the east-south direction.The heat island area and normal area are distinguished according to the heat ... 更多还原