广州市冬夏季热岛的空间格局及其差异分析

利用2003年夏季和冬季两景Landsat ETM图像的热红外波段反演了广州市地表温度(LST)的空间变化,并对冬季和夏季热岛空间分布特征的差异及成因进行了分析。结果表明,广州市冬季和夏季热岛的空间分布具有明显的规律性,并且空间分布、强度差异很大;夏季热岛集中区主要是建筑物和道路等非渗透表面组成地域以及人口最密集区域,冬季热岛的分布主要与工业区和运输业的分布相伴。引起这种差异的原因主要是城市能耗布局、下垫面性质、冬夏季生物学和热学特征综合作用的结果。

Spatial Distribution of Heat Island in Guangzhou in Summer and Winter

By using the infrared band of two Landsat ETM images in summer and winter of 2003,the spatial change of land surface temperature(LST) in Guangzhou City is derived,the difference and cause of spatial distribution characteristics of heat island in summer and winter is analyzed.The result shows that: spatial distribution of heat island in Guangzhou takes on obvious rules in summer and winter;the difference of spatial distribution and intensity of heat island are of heterogeneity.In summer,the heat island mainly existed in the areas of non-infiltration ground and those densely populated;in winter,it mainly appears around industrial areas and transportation zones.Its spatial difference between summer and winter is caused by the compositive effects of the factors,such as the distribution of energy consumption,features of underlying surface,and change of biological and thermological characteristics.