Sensitivity of low-level clouds and precipitation to anthropogenic aerosol emission in southern West Africa: a DACCIWA case study

Adrien Deroubaix (1, 2, 3) , Laurent Menut (1) , Cyrille Flamant (4) , Peter Knippertz (5) , Andreas H. Fink (5) , Anneke Batenburg (6) , Joel Brito (7) , Cyrielle Denjean (8) , Cheikh Dione (9) , Régis Dupuy (10) , Valerian Hahn (11, 12) , Norbert Kalthoff (5) , Fabienne Lohou (13) , Alfons Schwarzenboeck (9) , Guillaume Siour (14) , Paolo Tuccella (15) , Christiane Voigt (11, 12)

1 LMD - Laboratoire de Météorologie Dynamique (UMR 8539)
2 LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
3 MPI-M - Max-Planck-Institut für Meteorologie
4 TROPO - LATMOS
5 Institute of Meteorology and Climate Research
6 Particle Chemistry Department [Mainz]
7 IMT Lille Douai - Ecole nationale supérieure Mines-Télécom Lille Douai
8 CNRM - Centre national de recherches météorologiques
9 ACMAD - African Centre of Meteorological Applications for Development
10 LaMP - Laboratoire de Météorologie Physique
11 IPA - DLR Institut für Physik der Atmosphäre = DLR Institute of Atmospheric Physics
12 IPA - Institut für Physik der Atmosphäre [Mainz]
13 LAERO - Laboratoire d'aérologie
14 LISA (UMR_7583) - Laboratoire Interuniversitaire des Systèmes Atmosphériques
15 DSFC - Department of Physical and Chemical Sciences [L'Aquila]

During the West African summer monsoon, pollutants emitted in urbanized coastal areas modify cloud cover and precipitation patterns. The Dynamics-Aerosol-Chemistry-Cloud-Interactions in West Africa (DACCIWA) field campaign provided numerous aircraft-based and ground-based observations, which are used here to evaluate two experiments made with the coupled WRF-CHIMERE model, integrating both the direct and indirect aerosol effect on meteorology. During one welldocumented week (1-7 July 2016), the impacts of anthropogenic aerosols on the diurnal cycle of low-level clouds and pre-5

Domaines: Physique Atmosphérique et Océanique [physics.ao-ph]; Sciences de l'environnement; Climatologie

Adrien Deroubaix, Laurent Menut, Cyrille Flamant, Peter Knippertz, Andreas H. Fink, et al.. Sensitivity of low-level clouds and precipitation to anthropogenic aerosol emission in southern West Africa: a DACCIWA case study. Atmospheric Chemistry and Physics Discussions, 2022, pp.(under review). ⟨10.5194/acp-2020-1306⟩. ⟨insu-03198739v1⟩