Car DOAS Measurements of NO2, HCHO and SO2 in South Korea during GMAP 2021
- 1Max Planck Institute for Chemistry, Satellite Remote Sensing, Mainz, Germany
- 2Environmental Physics IUP, University of Bremen, Bremen, Germany
- 3Belgian Institute for Space Aeronomy BIRA-IASB, Brussels, Belgium
South Korea’s Geostationary Environment Monitoring Spectrometer (GEMS) instrument was launched in February 2020 for monitoring of air quality above Asia on an hourly basis. During multiple validation campaigns the data quality of GEMS is being evaluated. Between September and November 2021, the GEMS Map of Air Pollution (GMAP 2021) campaign was supported by mobile car DOAS measurements with two main goals: Determining the general agreement between satellite and ground based measurements with a focus on the intra-pixel variability and assessing the nitrogen oxides (NOx) emission strength of Seoul.
Mobile zenith sky DOAS observations from three instruments are combined and analyzed for Nitrogen Dioxide (NO2), Formaldehyde (HCHO) and Sulphur Dioxide (SO2). Emission estimates are performed for NO2 only, as the signal-to-noise of the other trace gases is too low. For the intra-pixel variability study, direct comparisons with NO2 vertical column densities as derived from the GEOstationary Coastal and Air Pollution Events (GEO-CAPE) Airborne Simulator (GCAS, operated by NASA) and GEMS measurements are performed.
How to cite: Dörner, S., Lange, K., Richter, A., van Roozendael, M., and Wagner, T.: Car DOAS Measurements of NO2, HCHO and SO2 in South Korea during GMAP 2021, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-4586, https://doi.org/10.5194/egusphere-egu22-4586, 2022.
