基于遥感的城市热岛效应研究

热红外遥感和气候学的交叉融合为城市热岛效应提供了新的研究方法。从城市热岛的空间分布与土地利用类型、植被覆盖关系、人为热关系以及城市热岛效应演变4方面分析热红外遥感在城市热岛研究中的应用现状;探讨目前存在的两个主要问题:城市地物真实温度难以获取,遥感和气候模型结合不密切;提出遥感和气候模型结合以及多平台、多尺度、多角度遥感的综合应用等是城市热岛效应遥感研究的发展趋势。

Application of Remote Sensing to Study Urban Heat Island Effect

Integrating thermal remote sensing and climatology provides a new method for observation and mechanism analysis of urban heat island.This paper reviews the applying of thermal remote sensing in urban heat island researches,which can be summarized from four ways:the relation between earth surface character and urban heat island,the relation between vegetation cover and urban heat island,the relation between human heat and urban heat island and the evolution of urban heat island effect.Then it puts forward the exiting two problems.The first is that it is difficult for remote sensing to reverse the true temperature of urban earth surface because of anisotropy and mixed pixel.The second problem is remote sensing cannot combine well with urban climate model because of the difference between the remotely sensed surface and the modeled surface.At last,the development tendency of urban heat island research using remote sensing is provided,which is the combination of remote sensing and climate model,and integrated analysis of multi-plat,multi-scale and multi-angle remote sensing sensors.