基于MODIS的北京地区一次霾过程的能见度反演  

Visibility inversion of a haze process in Beijing by remote sensing based on MODIS satellite observations

作　　者：包云轩[1,2] 邵艺 李迅[3] BAO Yunxuan;SHAO Yi;LI Xun(Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD),Nanjing University of Information Science&Technology,Nanjing 210044,China;Key Laboratory of Transportation Meteorology,China Meteorological Administration,Nanjing 210008,China;Meteorological Administrative of Beijing City,Beijing 100089 China)

机构地区：[1]南京信息工程大学气象灾害预报预警与评估协同创新中心,江苏南京210044 [2]中国气象局交通气象重点开放实验室,江苏南京210008 [3]北京市气象局,北京100089

出　　处：《大气科学学报》2018年第5期710-719,共10页Transactions of Atmospheric Sciences

基　　金：公益性行业(气象)科研专项(GYHY201406029; GYHY201306043);国家"十二五"科技支撑计划项目(2014BAG01B01);江苏省科技支撑计划(No.BE2015732);江苏省气象局北极阁基金资助项目(BJG201404)

摘　　要：利用MODIS_L1B数据,结合AERONET(AErosol RObotic NETwork)地面观测与反演的AOD(Aerosol Optical Depth)数据、北京市自动气象站网的能见度观测数据和北京市道面交通气象监测网的能见度观测数据,选取2012年3月6—11日期间发生在北京市的一次重大霾天气过程作为典型个例,反演了全过程的AOD和能见度变化,分析了两者之间的关系。结果表明:1)由MODIS遥感数据反演的AOD值与地面实测AOD值变化趋势均呈"单峰型",但由于存在观测时间的偏差,总体上反演值高于实测值; 2)利用AOD反演值得到的能见度值与实际能见度观测值基本吻合,两者的时空变化趋势基本一致,两者之间的相关系数大于0. 6(P<0. 01),符合此次霾过程的实际发生特征。Haze has become one of the major weather disasters to harm social security and human health in the recent years and it reduces visibility and air quality for it contains a large number of pollutants and affects seriously the natural environment,human production and life.Satellite remote sensing data can make up for the shortage of manual field monitoring,which making full use of timeliness,reliability,wide range of satellite remote-sensing to monitor dynamically the distribution of a wide range of haze.In this paper,MODIS_L1B data(MOD02_1KM-Collections 6)was used to inverse the air aerosol optical thickness(AOD)and the road visibility of a great haze weather event occurred in Beijing from March,6th to March,11th in 2012 combined with the retrieved data of AOD from AERONET(Aerosol Robotic Network)of NASA in USA,the observed data of visibility from the Ground Meteorological Observation Stations Network in Beijing and the observed data of visibility from the Road Automatic Weather Monitoring Stations Network and the relationship between the AOD and the visibility in this event was analyzed.Finally,the reasonable control measures were tried to put forward combined with the local traffic situation against haze.It can be provide reference for haze weather monitoring and early warning and traffic safety operation in the future(Inversion Comparison process time matches the satellite transit time from 10:00-12:00).The results showed as follows:(1)Both of the retrieved AOD values from MODIS remote sensing and the ground observed values of AOD from AERONET had a change tendency of a single peak type.But the AOD inversion values were higher than the observed values for the deviation of observed times.(2)The visibility values calculated by the retrieved AOD values was basically consistent with the observed values,both the temporal and spatial variation trends were basically consistent and the correlation coefficient between the two was large than 0.6(P<0.01).All of these inversions and calculation was consistent with the actu

关 键 词：霾 MODIS 气溶胶光学厚度(AOD) 能见度反演 比较分析 高速公路 

分 类 号：X513[环境科学与工程—环境工程] P427.2[天文地球—大气科学及气象学]