Terra和Aqua卫星MODIS 3 km AOD与北京PM_(2.5)对比分析  

Comparative analysis between hourly PM_(2.5) concentration and MODIS 3 km aerosol optical depth derived from Terra and Aqua satellites in Beijing

作　　者：王伟齐 张成网 臧增亮[1] 王体健[3] 尤伟[1] 

机构地区：[1]解放军理工大学气象海洋学院,南京211101 [2]海军东海舰队海洋水文气象中心,浙江台州318050 [3]南京大学大气科学学院,南京210023

出　　处：《气象科学》2017年第1期93-100,共8页Journal of the Meteorological Sciences

基　　金：国家自然科学基金资助项目(41275128)

摘　　要：本文利用2014年全年北京市12个空气质量监测站的逐小时PM_(2.5)地面观测资料,以及Terra卫星和Aqua卫星的MODIS 3 km气溶胶光学厚度(AOD)产品,分析了地面PM_(2.5)和两颗卫星AOD的时空分布特征,并在时空匹配的基础上,建立了AOD与PM_(2.5)浓度之间的回归模型。结果表明:PM_(2.5)浓度在城区高、郊区低,最低值位于定陵站,城区站和郊区站的逐时PM_(2.5)浓度的日变化分别呈"双峰型"和"单峰型";两颗卫星AOD数值也均是城区高、郊区低,沿山区的边界有明显的AOD梯度,且城区上午Terra卫星的AOD高于下午Aqua卫星的AOD,而郊区上、下午的AOD基本相同;Aqua卫星AOD与PM_(2.5)的确定系数(R2)较Terra卫星AOD与PM_(2.5)的确定系数平均高0.11,且城区站点两颗卫星AOD与PM_(2.5)相关性均较郊区站点AOD与PM_(2.5)相关性偏高;综合来看,Aqua卫星的AOD与城区的PM_(2.5)相关系数最高,即Aqua卫星的AOD更适于监测和反演城区地面的PM_(2.5)。By using the hourly PM_（2.5）surface observation data from 12 air quality monitoring stations in Beijing of 2014 and the Aerosol Optical Depth（ AOD） products at 3 km,the spatial and temporal distribution characteristics of surface PM_（2.5）and AOD of two satellites were analyzed,moreover,based on the spatial matching,the regression model of PM_（2.5）versus AOD was established. Results show that the PM_（2.5）concentration is higher in downtown region than that in suburban region while the lowest value appears in Dingling station. The daily variation of PM_（2.5）concentration shows bimodal and unimodal pattern in urban areas and suburban areas,respectively. The spatial distribution characteristics of AOD are similar to those of PM_（2.5）concentration,there is significant AOD gradient along the mountainous border. The AOD of Terra in the mornings are larger than those of Aqua in the afternoons in the urban,but in the suburbs,both of the AODs are essentially the same. The determination coefficient（ R2） between AOD of Aqua and PM_（2.5）concentration is 0. 11 higher than that between AOD of Aqua and PM_（2.5）concentration,and the average coefficients of determination（ R2） between AOD of Aqua and Terra and PM_（2.5）concentration in urban stations are higher than those in suburban stations. Comprehensively,the correlation coefficient of AOD of Aqua and PM_（2.5）is the highest in urban areas,which means that Aqua satellite is more adaptive to monitor and inverse ground-level PM_（2.5）in urban areas.

关 键 词：气溶胶光学厚度 逐时PM2.5 Terra卫星 Aqua卫星 

分 类 号：X16[环境科学与工程—环境科学]