数值模拟与遥感反演的广州城市热岛空间格局比较  

Comparative Analysis on Spatial Patterns of Urban Heat Island of Guangzhou by Numerical Simulation and Remote Sensing Retrieving

作　　者：江学顶[1] 夏北成[1] 郭泺[1] 李楠[1] 

机构地区：[1]中山大学环境科学与工程学院,广东广州510275

出　　处：《中山大学学报（自然科学版）》2006年第6期116-120,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家"985工程"环境与污染控制技术创新平台资助项目

摘　　要：利用中尺度模式MM5模拟广州地区的城市热岛效应,模式采用四重嵌套网格,最高分辨率为1 km;用Land7-ETM+热红外波段反演地温,两者与广州6个观测站实测温度差值均在1℃左右,两者地温及热岛分布特征一致,但遥感反演的地温更为细致。借助景观生态学理论,研究了数值模拟与遥感反演热岛的空间格局,发现两者空间格局相似。表明借鉴该理论,结合3S和数值模拟能研究热岛空间格局的动态变化。The non-hydrostatic mesoscale model MM5 was zhou with four-fold nesting and the finest mesh resolution used to simulate the urban heat island （UHI） in of l km. The land surface temperature （LST） Guang was retrieved by using the single sixth channel of thermal infrared data of ETM ＋ on Sep 14, 2000. it was about 1 ℃ of the discrepancies of temperature that was simulated by two means with temperature observed by automatic weather stations. The distribution characteristic of LST and Urban Heat Island Intensity （UHII） were similar by two means at the same time. The LST distribution retrieved by ETM ＋ was finer than by numerical simulation. The differences by two means were due to the differences of the precision, as the precision of the RS data was 60m, but the numerical simulation of MM5 was 1 km. Wetland, urban green-land and rivers partitioned the UHI, and caused their fractions increasing. It was explosive that the spatial pattern of the numerical simulation and RS data retrieved from ETM ＋ were analyzed by landscape ecology. The integration of the numerical simulation and methods of landscape ecology was found to be effective means to study UHI characteristic of spatial pattern.

关 键 词：城市热岛 中尺度模式MM5 空间格局 遥感 广州 

分 类 号：X16[环境科学与工程—环境科学]