EGU General Assembly 2020
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Quantifying South Eastern Europe NOx and SO2 emissions using S5P/TROPOMI; from the urban to the regional scale.

Maria-Elissavet Koukouli1, Ioanna Skoulidou1, Arjo Segers2, Astrid Manders-Groot2, Jeroen Kuenen2, Jos van Geffen3, Henk Eskes3, Pascal Hedelt4, Diego Loyola4, Tzenny Stavrakou5, Voula Tzoumaka6, Apostolos Kelessis6, Dimitris Karagkiozidis1, and Dimitris Balis1
Maria-Elissavet Koukouli et al.
  • 1Aristotle University of Thessaloniki, Laboratory of Atmospheric Physics, Physics Department, Thessaloniki, Greece (
  • 2TNO, Climate Air and Sustainability Unit, Utrecht, The Netherlands
  • 3Royal Netherlands Meteorological Institute (KNMI), De Bilt, The Netherlands
  • 4German Aerospace Center (DLR), Remote Sensing Technology Institute, Oberpfaffenhofen, Germany
  • 5Royal Belgian Institute for Space Aeronomy, Brussel, Belgium
  • 6Department of Environment, Municipality of Thessaloniki, Thessaloniki, Greece

Even though the actual levels of anthropogenic pollution around South Eastern Europe do not reach the ones experienced in numerous Central and Western locations such as the Po Valley, the Benelux regions, the English Channel, etc., both nitrogen and sulphur oxides remain a cause for concern for air quality issues in the area. S5P/TROPOMI offers a high enough spatial resolution of 3.5x7km2 (x5.5km2 since August 2019) coupled with a high signal-to-noise to allow the monitoring of air quality levels, as well as the calculation of emissions, around the overpass time of the satellite. In that respect, LOTOS-EUROS Chemical Transport Model (CTM) simulations for year 2018 will be used in conjunction to the S5P/TROPOMI NO2 v01.03.02 and SO2 v01.01.07 columns to update the current emission inventory used in CAMS, provided recently by TNO for year 2015.

The process is validated at every step; the CTM surface concentrations are being compared to the European Environmental Agency E1a & E2a in situ air quality station data while the satellite vertical columns are compared to MAX-DOAS ground-based measurements. The diurnal variability of the NO2 depicted by the in situ and the CTM is examined, as a source of understanding the effect of the apriori emission fields, the OH radical chemistry, the planetary boundary layer definition, etc., within the model structure. The seasonal variability of the SO2 columns observed by the satellite and ground-based instruments reveals the amount of insufficiently filtered power plants and smelting activities in the area, including transboundary transport around the Balkan Peninsula.

Area sources, such as cities and industrial regions, as well as shipping plumes around the Aegean Sea, the Bosporus Strait and the Eastern Mediterranean, will be characterized vis-à-vis their updated emissions and discussed.


We acknowledge support of this work by the project “PANhellenic infrastructure for Atmospheric Composition and climatE change” (MIS 5021516) which is implemented under the Action “Reinforcement of the Research and Innovation Infrastructure”, funded by the Operational Programme "Competitiveness, Entrepreneurship and Innovation" (NSRF 2014-2020) and co-financed by Greece and the European Union (European Regional Development Fund). This work was co-funded by ESA within the Contract No. 4000117151/16/l-LG “Preparation and Operations of the Mission Performance Centre (MPC) for the Copernicus Sentinel-5 Precursor Satellite”.

How to cite: Koukouli, M.-E., Skoulidou, I., Segers, A., Manders-Groot, A., Kuenen, J., van Geffen, J., Eskes, H., Hedelt, P., Loyola, D., Stavrakou, T., Tzoumaka, V., Kelessis, A., Karagkiozidis, D., and Balis, D.: Quantifying South Eastern Europe NOx and SO2 emissions using S5P/TROPOMI; from the urban to the regional scale., EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-8043,, 2020.


Display file

Comments on the display

AC: Author Comment | CC: Community Comment | Report abuse

displays version 1 – uploaded on 29 Apr 2020, no comments