Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Spatial and Temporal Variation of NO2 Vertical Column Densities (VCDs) over Poland: Comparison of the Sentinel-5P TROPOMI Observations and the GEM-AQ Model Simulations

Version 1 : Received: 15 June 2021 / Approved: 16 June 2021 / Online: 16 June 2021 (10:24:03 CEST)
Version 2 : Received: 2 July 2021 / Approved: 5 July 2021 / Online: 5 July 2021 (09:56:26 CEST)

A peer-reviewed article of this Preprint also exists.

Kawka, M.; Struzewska, J.; Kaminski, J.W. Spatial and Temporal Variation of NO2 Vertical Column Densities (VCDs) over Poland: Comparison of the Sentinel-5P TROPOMI Observations and the GEM-AQ Model Simulations. Atmosphere 2021, 12, 896. Kawka, M.; Struzewska, J.; Kaminski, J.W. Spatial and Temporal Variation of NO2 Vertical Column Densities (VCDs) over Poland: Comparison of the Sentinel-5P TROPOMI Observations and the GEM-AQ Model Simulations. Atmosphere 2021, 12, 896.

Journal reference: Atmosphere 2021, 12, 896
DOI: 10.3390/atmos12070896

Abstract

TRPOMI instrument aboard Sentinel-5P is a relatively new, high-resolution source of information about atmosphere composition. One of the primary atmospheric trace gases that we can observe through it is nitrogen dioxide. By now, we were using the chemical weather model (GEM-AQ) as a mean for estimating nitrogen dioxide concentration on a regional scale. Although well established in atmospheric science, the GEM-AQ simulations were always based on emission data, which in the case of the energy sector were reported by stack owners. In this paper, we attempted to compare the TROPOMI and GEM-AQ derived VCDs over Poland with a particular focus on large point emitters. We also checked how cloudy conditions influence TROPOMI results. Finally, we tried to link the NO2 column number densities with surface concentration using boundary layer height as an additional explanatory variable

Subject Areas

air pollution; NO2; Sentinel-5P; TROPOMI; GEM-AQ; Poland

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