Articles | Volume 17, issue 9
Atmos. Chem. Phys., 17, 5829–5849, 2017
https://doi.org/10.5194/acp-17-5829-2017
Atmos. Chem. Phys., 17, 5829–5849, 2017
https://doi.org/10.5194/acp-17-5829-2017

Research article 11 May 2017

Research article | 11 May 2017

Comparisons of ground-based tropospheric NO2 MAX-DOAS measurements to satellite observations with the aid of an air quality model over the Thessaloniki area, Greece

Theano Drosoglou et al.

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Short summary
We present ground-based tropospheric NO2 measurements performed within the area of Thessaloniki, Greece. The comparisons with OMI/Aura, GOME-2A and GOME-2B data sets have shown a significant underestimation of the NO2 levels over the urban area by the satellite sensors. This finding can be attributed to the strong NO2 gradients. By applying adjustment factors, calculated using an air quality model, on the OMI/Aura observations, the comparison over the urban site has improved significantly.
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