城市地表热环境遥感监测指标研究及应用

Research on Urban Surface Heat Environment Monitoring Indexes and Its Application

遥感已成为城市热环境监测的重要手段,但仅依靠城市地表温度(或亮温)仍难以定量分析城市热环境的时空变化。文章提出了城市热环境遥感监测的3个指标:热岛强度、热场强度指数和热岛比例指数,并利用2年的MODIS地表温度产品与FY-3A/MERSI卫星资料对北京地区进行了热环境遥感监测应用与分析。结果表明:上述3个热环境遥感监测指标在城市热岛监测中具有指示意义,能有效监测北京城市热岛的强弱和变化,对开展城市热环境监测气象业务具有积极意义。

Remote sensing has become an important means for monitoring urban heat environment.It is still difficult to quantitatively analyze the spatiotemporal change of the urban heat environment only by ground surface temperature or brightness temperature presently.Based on the examination of remote sensing images,three heat environment monitoring indexes are put forward： urban heat island intensity,heat field intensity index,and urban heat proportion index.The MODIS surface temperature products and FY3A/MERSI of two years are used for monitoring and analyzing the Beijing area heat environment.The results show that the three indexes can monitor the intensity and variation of the Beijing heat island effect,and have significance in urban heat island monitoring.