MAX-DOAS and OMI Measurements of Tropospheric NO2 and HCHO over Eastern China

查看全文 作　　者：Ka-Lok [1]CHAN;Zhuoru [1]WANG;Aijun [2]DING;Klaus-Peter [1]HEUE;Nan [3]HAO;Mark [4]WENIG

机构地区：[1]Remote Sensing Technology Institute(IMF),German Aerospace Center(DLR),Oberpfaffenhofen 82234,Germany;[2]School of Atmospheric Sciences,Nanjing University,Nanjing 210000,China;[3]European Organisation for the Exploitation of Meteorological Satellites(EUMETSAT),Darmstadt 64283,Germany;[4]Meteorological Institute,Ludwig-Maximilians-Universit t München,München 80331,Germany

出　　处：《Journal of Geodesy and Geoinformation Science》索引2020年第3卷第4期,共13页

基　　金：ESA-MOST Dragon 4 Cooperation Programme(DRAGON 4 ID:32271_3)。 摘　　要：In this paper,we present long term observations of atmospheric nitrogen dioxide(NO2)and formaldehyde(HCHO)in Nanjing using a Multi-AXis Differential Optical Absorption Spectroscopy(MAX-DOAS)instrument.Ground based MAX-DOAS measurements were performed from April 2013 to February 2017.The MAX-DOAS measurements of NO2 and HCHO vertical column densities(VCDs)are used to validate OMI satellite observations over Nanjing.The comparison shows that the OMI observations of NO2 correlate well with the MAX-DOAS data with Pearson correlation coefficient(R)of 0.91.The comparison result of MAX-DOAS and OMI observations of HCHO VCD shows a good agreement with R of 0.75 and the slope of the regression line is 0.99.The age weighted backward propagation approach is applied to the MAX-DOAS measurements of NO2 and HCHO to reconstruct the spatial distribution of NO2 and HCHO over the Yangtze River Delta during summer and winter time.The reconstructed NO2 fields show a distinct agreement with OMI satellite observations.However,due to the short atmospheric lifetime of HCHO,the backward propagated HCHO data does not show a strong spatial correlation with the OMI HCHO observations.The result shows the MAX-DOAS measurements are sensitive to the air pollution transportation in the Yangtze River Delta,indicating the air quality in Nanjing is significantly influenced by regional transportation of air pollutants. 关键词：MAX-DOAS OMI NO2 FORMALDEHYDE pollution transport

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MAX-DOAS and OMI Measurements of Tropospheric NO2 and HCHO over Eastern China

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