城市生态环境建设、减缓热岛效应是当前我国城市发展的一个热点问题.为了避免相关规划决策的盲目性, 需要就城市下垫面类型对城市地面热分布的影响进行客观的分析研究, 提供科学依据.本文以上海为例, 利用不同 季节白天Landsat ETM+遥感资料为信息源, 在地面亮温反演、彩色合成和下垫面分类结果的基础上, 就城市地面 亮温与下垫面类型关系, 从定性和定量两个层次上, 进行了较为全面的对比分析.结果表明:城市地面亮温与下垫 面类型密切相关, 在白天, 如果以新村、花园小区或自然村落组成的居住区地面亮温为基准, 水体在夏季和冬季均 起降温作用;土壤与植被在夏季有降温作用, 但在冬季有明显的增温作用;其它城建设施在夏季和冬季均起增温作 用.本文建立的模型可以为城市生态环境规划、热岛效应预测等工作服务

Weakening the effect of heat island by environment construction is one of the key aspects for city development. To assure the reasonable planning of city construction, it is helpful analyzing the effect of land use types on ground heat distribution to get scientific data. In this study, by using Landsat ETM+ daytime remote sensing data of Shanghai, the inversion of ground bright temperature (GBT), the compose of color map and the classification of land use were made. On this basis, the relationships between daytime GBT distribution and land use types of city were analysed qualitatively and quantitatively. The results show that there are close relations between GBT distribution and land use types. By taking the GBT of resident sections (except that haven't landscapes of vegetation and water) as reference temperature, the water sections play a role of decreasing GBT both in summer and in winter, the soil and vegetation sections can decrease GBT in summer, but increase GBT in winter, and the other city establishment sections will increase GBT both in summer and in winter. The statistical formula obtained in this study may be used in programming of city environment and forecasting of heat island effect.temperature(GBT)