重大公共卫生事件影响下广州气溶胶分布变化  

Aerosol Optical Depth Distribution and Change in Guangzhou during the Important Public Health Emergency Period

作　　者：刘锐[1] 廖卉芃 杨卫军[2] 郭亮[2] 陈冬琼 LIU Rui

机构地区：[1]广东省国土资源技术中心,广东广州510075 [2]广州市城市规划勘测设计研究院,广东广州510060

出　　处：《地理空间信息》2021年第6期22-25,I0001,共5页Geospatial Information

基　　金：广东省城市感知与监测预警重点实验室项目(2020B121202019)。

摘　　要：通过暗像元法对广州市2020-01-03、2020-01-31、2020-02-22、2020-02-24、2020-03-15、2020-04-09、2020-04-27的MODIS影像进行气溶胶光学厚度反演,分析新型冠状病毒肺炎疫情期间广州市气溶胶光学厚度在时空上的变化情况。结果表明广州市全域气溶胶光学厚度在1月31日达到最低,期间正值广东省启动重大突发公共卫生事件一级响应,城市人为活动大幅减少。2月22日及以后,全市气溶胶光学厚度总体上升,此时城市进入复工复产阶段。研究表明利用卫星遥感手段快速反演气溶胶光学厚度,可在重大突发公共卫生事件发生时监测城市人为活动情况,辅助政府决策和宏观调控。In this paper, we used MODIS data to retrieve aerosol optical depth(AOD) on January 1st, January 31st, February 22nd, February 24th, March 15th, April 9th, and April 27th in Guangzhou by dark target method, and analyzed the spatial distribution and change of AOD in Guangzhou during the domestic COVID-19 epidemic. The results indicated that Guangzhou’s AOD reached to the lowest on January 31st, when Guangdong Province executed Level-Ⅰ alert of emergent public health incidents and reduced human activities. After February 22nd, the AOD generally increased, when the city turned into the stage of work resumption. This study shows that it is fast, economical, and applicable to use MODIS-retrieved AOD to monitor human activities for governmental surveillance and decision-making during important public health emergency occurring period.

关 键 词：卫星遥感 气溶胶光学厚度反演 城市活动监测 重大突发公共卫生事件防控 

分 类 号：P208[天文地球—地图制图学与地理信息工程]