基于Landsat TM的澳门城市热场影响因素分析

利用2004年10月19日Landsat TM数据提取澳门城区城市用地类型信息,反演城市地表温度,在此基础上通过主成分回归方法分析澳门城市热场的影响因素.结果表明,澳门城市热场受到硬化地表指数的影响较大,其次为植被比例.地表温度与硬化地表指数、道路密度呈显著正相关(P＜0.05),与归一化植被指数、植被比例及水体比例呈显著负相关(P＜0.05).

Landsat TM-Based Factor Analysis of Urban Thermal Field in Macau

Along with development of urbanization,urban thermal field (or urban thermal environment) is changing accordingly as function of numerous factors.One of the changes is the so-called urban heat island effect.To analyze geographical information related to urban land-use types in Macau and to extract data on urban surface temperature as well as urban impermeable surface,GIS and RS were used.Based on the Landsat TM data collected on October 19,2004,factors influencing urban thermal field were studied by the principal component regression method.Results show that the urban thermal field in Macau was greatly affected by impervious surface index,and surface temperature was positively correlated with impervious surface index and road density (P＜0.05),while negatively correlated with vegetation index,vegetation cover and proportion of waterbody(P＜0.05).