基于Landsat-8 OLI/TIRS影像的长沙市城市热环境效应研究  

Study on urban thermal environment effect of Changsha based on Landsat-8 OLI/TIRS image

作　　者：何炳伟 韩沁哲 HE Bing-wei;HAN Qin-zhe(Meteorological Bureau of Fenghuang County,Fenghuang 416200,Hunan,China;Key Laboratory of Disaster Prevention and Reduction in Hu-nan Province,Changsha 410118,China;Hunan Instiute of Meteorological Research,Changsha 410007,China)

机构地区：[1]凤凰县气象局,湖南凤凰416200 [2]湖南省防灾减灾重点实验室,长沙410118 [3]湖南省气象科学研究所,长沙410007

出　　处：《湖北农业科学》2020年第11期69-75,80,共8页Hubei Agricultural Sciences

基　　金：湖南省气象局重点课题(XQKJ18A003)。

摘　　要：基于长沙市2016年7月23日的Landsat8 OLI/TIRS数据,利用覃志豪单窗算法反演地表温度,分析了长沙市城市热环境空间分布特征以及主要地表生态环境参数与城市热环境效应的关系。结果表明,(1)长沙市主城区地表温度均较高,高温区域主要分布在建筑用地密集、功能单一以及周边植被覆盖少的地区;(2)长沙市热岛区范围与城市建成区范围基本一致,构成热岛区面积较大的特高温区和高温区主要分布在中心城区和长沙县,城市热岛比例指数达0.712,反映出城市热环境形势较为严峻;(3)建筑用地对地表起着升温的作用,植被则相反,且前者升温效果明显强于后者的降温效果。长沙市在未来的城市规划中应在控制建筑用地扩张的同时增加植被覆盖,这样才能有效缓解城市热岛效应。Based on Landsat 8 OLI/TIRS data of Changsha on July 23th of 2016,the surface temperature was retrieved by using Qin Zhihao single window algorithm.The spatial distribution characteristics of urban thermal environment and the influence of main surface ecological environment parameters on urban thermal environment effect were analyzed.The results show are as follows:(1)The sur⁃face temperature of the main urban area of Changsha is relatively higher,and the high temperature areas are mainly distributed in ar⁃eas with high density urban construction,single function of urban construction and less vegetation coverage;(2)the range of heat is⁃land area of Changsha is basically the same as the built-up area of the city,the super-high temperature area and the high temperature area which constitute the heat island area are mainly distributed in the Central District and Changsha County.Overall,the Urban-Heat-Island-Ratio-Index is as high as 0.712,and the urban heat environment situation of Changsha has become more severe;(3)Quantitative analysis of the relationship between surface parameters and surface temperature shows that the built-up land plays a role in increasing surface temperature,while vegetation does the opposite,and the heating effect of the built-up land is much stronger than that of vegetation.Therefore,in the future urban planning,the urban heat island effect can be effectively alleviated by increasing vege⁃tation while reducing the area of construction land.

关 键 词：Landsat8 OLI/TIRS 城市热环境 URI 长沙市 

分 类 号：P407[天文地球—大气科学及气象学] TP79[自动化与计算机技术—检测技术与自动化装置]