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MAX-DOAS measurements of tropospheric NO2 and HCHO in Munich and the comparison to OMI and TROPOMI satellite observations

Chan, Ka Lok; Wiegner, Matthias; Geffen, Jos van; Smedt, Isabelle De; Alberti, Carlos ORCID iD icon 1; Cheng, Zhibin; Ye, Sheng; Wenig, Mark
1 Institut für Meteorologie und Klimaforschung Atmosphärische Spurengase und Fernerkundung (IMKASF), Karlsruher Institut für Technologie (KIT)

Abstract:

We present two-dimensional scanning Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) observations of nitrogen dioxide (NO2) and formaldehyde (HCHO) in Munich. Vertical columns and vertical distribution profiles of aerosol extinction coefficient, NO2 and HCHO are retrieved from the 2D MAX-DOAS observations. The measured surface aerosol extinction coefficients and NO2 mixing ratios derived from the retrieved profiles are compared to in situ monitoring data, and the surface NO2 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 NO2 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 NO2 and HCHO in Munich. ... mehr

Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung Atmosphärische Spurengase und Fernerkundung (IMKASF)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1867-8548
KITopen-ID: 1000124522
Erschienen in Atmospheric measurement techniques
Verlag Copernicus Publications
Band 13
Heft 8
Seiten 4499–4520
Vorab online veröffentlicht am 19.08.2020
Nachgewiesen in Web of Science
Scopus
Dimensions

Verlagsausgabe §
DOI: 10.5445/IR/1000124522
Veröffentlicht am 13.10.2020
Originalveröffentlichung
DOI: 10.5194/amt-13-4499-2020
Scopus
Zitationen: 62
Web of Science
Zitationen: 56
Dimensions
Zitationen: 65
Seitenaufrufe: 168
seit 16.10.2020
Downloads: 79
seit 11.11.2020
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