Articles | Volume 25, issue 5
https://doi.org/10.5194/acp-25-2863-2025
https://doi.org/10.5194/acp-25-2863-2025
Research article
 | 
10 Mar 2025
Research article |  | 10 Mar 2025

Natural emissions of VOC and NOx over Africa constrained by TROPOMI HCHO and NO2 data using the MAGRITTEv1.1 model

Beata Opacka, Trissevgeni Stavrakou, Jean-François Müller, Isabelle De Smedt, Jos van Geffen, Eloise A. Marais, Rebekah P. Horner, Dylan B. Millet, Kelly C. Wells, and Alex B. Guenther

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Subject: Gases | Research Activity: Atmospheric Modelling and Data Analysis | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
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Cited articles

Adon, M., Galy-Lacaux, C., Yoboué, V., Delon, C., Lacaux, J. P., Castera, P., Gardrat, E., Pienaar, J., Al Ourabi, H., Laouali, D., Diop, B., Sigha-Nkamdjou, L., Akpo, A., Tathy, J. P., Lavenu, F., and Mougin, E.: Long term measurements of sulfur dioxide, nitrogen dioxide, ammonia, nitric acid and ozone in Africa using passive samplers, Atmos. Chem. Phys., 10, 7467–7487, https://doi.org/10.5194/acp-10-7467-2010, 2010. 
Akpo, A., Galy-Lacaux, C., Delon, C., Gardrat, E., Dias Alves, M., Lenoir, O., Halisson, J., Darakpa, C., and Darakpa, D.: Trace gases, Djougou, Benin, Aeris [data set], https://doi.org/10.25326/605, 2023. 
Akpo, A. B., Galy-Lacaux, C., Laouali, D., Delon, C., Liousse, C., Adon, M., Gardrat, E., Mariscal, A., and Darakpa, C.: Precipitation chemistry and wet deposition in a remote wet savanna site in West Africa: Djougou (Benin), Atmos. Environ., 115, 110–123, https://doi.org/10.1016/j.atmosenv.2015.04.064, 2015. 
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Short summary
Vegetation releases biogenic volatile organic compounds, while soils and lightning contribute to the natural emissions of nitrogen oxides into the atmosphere. These gases interact in complex ways. Using satellite data and models, we developed a new method to simultaneously optimize these natural emissions over Africa in 2019. Our approach resulted in an increase in natural emissions, supported by independent data indicating that current estimates are underestimated.
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