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MAX-DOAS measurements of tropospheric NO$_{2}$ and HCHO in Munich and the comparison to OMI and TROPOMI satellite observations

Chan, Ka Lok; Wiegner, Matthias; Geffen, Jos van; De Smedt, Isabelle; Alberti, Carlos; Cheng, Zhibin; Ye, Sheng; Wenig, Mark

Abstract:
We present two-dimensional scanning Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) observations of nitrogen dioxide (NO$_{2}$) and formaldehyde (HCHO) in Munich. Vertical columns and vertical distribution profiles of aerosol extinction coefficient, NO$_{2}$ and HCHO are retrieved from the 2D MAX-DOAS observations. The measured surface aerosol extinction coefficients and NO$_{2}$ mixing ratios derived from the retrieved profiles are compared to in situ monitoring data, and the surface NO$_{2}$ mixing ratios show a good agreement with in situ monitoring data with a Pearson correlation coefficient (R) of 0.91. The aerosol optical depths (AODs) show good agreement as well (R = 0.80) when compared to sun photometer measurements. Tropospheric vertical column densities (VCDs) of NO$_{2}$ and HCHO derived from the MAX-DOAS measurements are also used to validate Ozone Monitoring Instrument (OMI) and TROPOspheric Monitoring Instrument (TROPOMI) satellite observations. Monthly averaged data show a good correlation; however, satellite observations are on average 30 % lower than the MAX-DOAS measurements. Furthermore, the MAX-DOAS observations are used to investigate the spatiotemporal characteristic of NO$_{2}$ and HCHO in Munich. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000124522
Veröffentlicht am 13.10.2020
Originalveröffentlichung
DOI: 10.5194/amt-13-4499-2020
Scopus
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1867-8548
KITopen-ID: 1000124522
Erschienen in Atmospheric measurement techniques
Band 13
Heft 8
Seiten 4499–4520
Vorab online veröffentlicht am 19.08.2020
Nachgewiesen in Web of Science
Scopus
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