耦合卫星热红外与气象数据的广州城市热环境演变研究  

Study on the Evolution of the Urban Thermal Environment of Guangzhou by Coupling Satellite Thermal Infrared Imagery with Meteorological Data

作　　者：柳芬芬 徐涵秋[1,2] Liu Fenfen;Xu Hanqiu(College of Environment and Safety Engineering,Institute of Remote Sensing Information Engineering,Fuzhou University,Fuzhou 350116,China;Fujian Provincial Key Laboratory of Remote Sensing Monitoring and Assessment of Soil Erosion and Disaster Prevention,Fuzhou 350116,China)

机构地区：[1]福州大学环境与安全工程学院,福州大学遥感信息工程研究所,福建福州350116 [2]福建省水土流失遥感监测评估与灾害防治重点实验室,福建福州350116

出　　处：《遥感技术与应用》2024年第6期1500-1511,共12页Remote Sensing Technology and Application

基　　金：国家自然科学基金项目(31971639)。

摘　　要：近10年来广州城市显著扩张,为了考察其扩张是否加剧了广州的城市热岛效应,研究以Landsat卫星的热红外影像为数据源,通过反演地表温度,计算城市热岛比例指数(Urban-Heat-Island Ratio Index,URI),并耦合气象数据分别计算国际和国内高温热浪指数来分析广州市2011~2022年间的城市热岛时空变化,探索卫星热红外数据和高温热浪数据协同研究城市热岛效应的可能性。结果表明:①2011~2022年,广州城市热岛范围与城市建成区空间扩展范围基本一致,都以中部老城区为中心向南北方向扩展。②广州城市热岛比例指数在2011~2022年期间并没有明显上升,这是由于广州开展了为城市降温的“酷城行动”,使其城市热岛效应得到了有效控制。③对比国内、国际的高温热浪指数发现,国内的高温热浪指数更适合广州的具体情况,其与遥感URI指数的协同使用能够更合理地解释广州的城市热岛变化。To investigate whether urban expansion exacerbates the Urban Heat Island effect(UHI)in Guangzhou,the thermal infrared imagery of Landsat satellite was used as the data source,the single-channel algorithm was used to invert the land surface temperature,and the Urban-Heat-Island Ratio Index(URI)was calculated to measure UHI effect.Coupled with the meteorological data,the heat wave index was calculated to analyze the UHI distribution and its variation during 2011~2022 in Guangzhou and to explore the possibility of its synergistic use to study urban heat island effect with satellite thermal infrared data.The results show that:(1)From 2011 to 2022,the spatial range of urban heat island of Guangzhou was basically the same as the spatial range of expanded urban built-up area,which has expanded to north and south from the old city center.(2)From 2011 to 2022,URI in Guangzhou showed a slightly increasing trend though the city expanded dramatically.This suggests that the UHI effect was effectively controlled due to the"Cool City Action"carried out in Guangzhou to cool down the city.(3)Comparing the domestic and international heat wave indexes,it was found that the domestic heat wave index was more suitable for the situation of Guangzhou,which can explain the changes of UHI in Guangzhou more reasonably and achieve a better result when synergistic use with the remote sensing based-URI index.

关 键 词：地表温度 城市热岛 URI 热浪 广州 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]