基于Landsat ETM+/TM遥感影像的江门市区地表热环境分析  

MONITORING CHANGES IN LAND SURFACE THERMAL FIELD FROM LANDSAT ETM+/TM DATA IN JIANGMEN CITY,GUANGDONG PROVINCE

作　　者：梁敏妍[1] 赵小艳[2] 林卓宏[1] 黄晓东[1] 张薇[1] 管勇[1] 

机构地区：[1]江门市气象局,广东江门529030 [2]南京信息工程大学应用气象学院,江苏南京210044

出　　处：《热带气象学报》2011年第2期244-250,共7页Journal of Tropical Meteorology

摘　　要：应用基于影像的反演算法对2001年11月20日和2005年11月23日的Landsat ETM+/TM卫星资料,反演广东省江门市区的地表温度,分析江门市区秋季地表热环境时空演变特征。结果表明:(1)空间上,江门市区秋季地表热环境具有明显差异性,呈现出较强的城市热岛效应,城区地表温度普遍高于郊区2℃以上;(2)时间上,随着城市的发展,地表高热环境区面积扩张明显,新城区呈现出更强的热环境效应;(3)不同下垫面的地表热环境状况差异显著,林地、农田、水体区热环境等级比建筑用地低1～3等级。因此,在城市规划中,适当增加城市绿地和水体面积,可改善城市地表热环境,缓和城市热岛效应。Using Land Surface Temperature and Normalized Difference Surface Temperature Index（NDSTI） retrieved by landsat ETM＋/TM data in both 2001 and 2005,distribution of and change in land surface thermal field of Jiangmen,Guangdong,in autumn were analyzed.Results showed as follows：（1） In space,surface thermal environment showed obvious differentiation and urban heat-island effect and the land surface temperature of city was 2 ℃ higher than that of the suburbs.（2） Over time,with the development of the city,a region of higher surface temperature expanded significantly,and the newly constructed part of the city showed stronger thermal environmental effect.（3） The thermal environment of different land-utilization/ coverage-type had significant difference and the level of thermal environment of was 1～3 grades higher over land under construction than over woodland,farmland and water bodies.

关 键 词：遥感 地表温度 基于影像的反演算法 热环境效应 

分 类 号：P407[天文地球—大气科学及气象学]