EGU21-4566
https://doi.org/10.5194/egusphere-egu21-4566
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Analysis of the anthropogenic and biogenic NOx emissions over 2008-2017: assessment of the trends in the 30 most populated urban areas in Europe

Audrey Fortems-Cheiney1, Gregoire Broquet1, Isabelle Pison1, Marielle Saunois1, Elise Potier1, Antoine Berchet1, Gaelle Dufour2, Guillaume Siour2, Hugo Denier van der Gon3, Stijn Dellaert3, and Folkert Boersma4,5
Audrey Fortems-Cheiney et al.
  • 1Laboratoire des Sciences du Climat et de l’Environnement, LSCE-IPSL (CEA-CNRS-UVSQ), Université Paris-Saclay, 91191 Gif-sur-Yvette, France. (audrey.fortems@lsce.ipsl.fr)
  • 2Laboratoire Interuniversitaire des Systèmes Atmosphériques, UMR CNRS 7583, Université Paris Est Créteil et Université de Paris, Institut Pierre Simon Laplace, Créteil, France.
  • 3Department of Climate, Air and Sustainability, TNO, P.O. Box 80015, 3508 TA Utrecht, Netherlands
  • 4Wageningen University, Meteorology and Air Quality Section, Wageningen, the Netherlands.
  • 5Royal Netherlands Meteorological Institute, R&D Satellite Observations, de Bilt, the Netherlands.

We use the OMI-QA4ECV-v1.1 NO2 tropospheric columns over the 10-yr 2008-2017 period to confront satellite-based trends in NO2 concentrations to those from the state-of-the-art regional chemistry-transport model CHIMERE and to evaluate the bottom-up anthropogenic and biogenic NOx emissions in Europe. A focus is made for the 30 most populated urban areas in Europe. Over urban areas in Western Europe, except for coastal cities, OMI confirm the drop in the simulated CHIMERE NO2 tropospheric columns based on the latest country emission official reporting. OMI does not show significant decreasing trends over Central and Eastern Europe urban areas. Increasing biogenic emissions helps reconciling CHIMERE and OMI trends over urban areas in Central Europe and over rural areas, confirming the importance of accounting for non-anthropogenic emissions to assess long-term trends. Over Eastern Europe, our results question emission reductions estimated for particular sectors and in particular the road transport, public power and industrial emissions.

How to cite: Fortems-Cheiney, A., Broquet, G., Pison, I., Saunois, M., Potier, E., Berchet, A., Dufour, G., Siour, G., Denier van der Gon, H., Dellaert, S., and Boersma, F.: Analysis of the anthropogenic and biogenic NOx emissions over 2008-2017: assessment of the trends in the 30 most populated urban areas in Europe, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-4566, https://doi.org/10.5194/egusphere-egu21-4566, 2021.