Landsat影像的地表温度反演及其强度变化分析  

Land surface temperature and intensity analysis based on Landsat

作　　者：张船红 郭豫宾[1] ZHANG Chuanhong;GUO Yubin(Modern Surveying and Mapping Technology Center,Sichuan College of Architectural Technology,Deyang,Sichuan 618000,China;College of Geophysics,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]四川建筑职业技术学院现代测绘技术中心,四川德阳618000 [2]成都理工大学地球物理学院,成都610059

出　　处：《测绘科学》2020年第3期61-66,94,共7页Science of Surveying and Mapping

基　　金：四川省教育厅一般项目(15ZB0448,16ZB0519);国家重点研发计划重点专项(2018YFC0706000);四川省教育厅自然科学创新团队项目(16TD0040)。

摘　　要：针对不同城市地表类型,如何获取其地温反演所需各项参数已成为目前研究的重点问题。该文以Landsat影像为数据源,采用单窗算法对成都市进行地温反演,同时利用ENVI5.3 Landsat 8 LST模块对其结果进行验证,得到研究区地温反演所需参数地表比辐射率ε和大气透射率τ的取值。结果表明,该研究所得参数误差小,精度高,与研究区情况吻合。从而进一步分析研究区2009-2018年地温情况,表明成都市地表温度呈上升趋势,年均增长0.51℃。利用均值-标准差法对成都市进行地温等级划分,并计算其强度指数,得出研究区地温强度呈下降-上升趋势。For different urban land surface types,how to obtain the parameters required for the inversion of land surface temperature(LST) had become the focus of current research.In this paper,Landsat images were used as the data source to carry out LST inversion in Chengdu by using the Mono-window algorithm,and the results were verified by using ENVI5.3 Landsat 8 LST module.The values of land surface emissivity and atmospheric transmittance needed for LST inversion in the study area were obtained.The results showed that the error of the parameters was small and the precision was high.Further analysis of the study area land surface temperature in 2009-2018,showed that the surface temperature of Chengdu was on the rise,the average annual growth of 0.51 ℃.The mean-standard deviation method was used to classify the temperature intensity in Chengdu,and its intensity index was calculated,indicating that the surface temperature intensity range area in the study area showed a trend of decreasing first and then increasing.

关 键 词：地表温度 单窗算法 地表比辐射率 大气透射率 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]