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.