The Dynamics-Aerosol-Chemistry-Cloud Interactions in West Africa field campaign: Overview and research highlights

Cyrille Flamant 1 Peter Knippertz 2 Andreas H. Fink 2 Aristide Akpo 3 Barbara J. Brooks 3 Christine J. Chiu 4 Hugh Coe 5 Sylvester Danuor 6 Mat J. Evans 7, 8 Oluwagbemiga Jegede 9 Norbert Kalthoff 2 Abdourahamane Konaré 10 Catherine Liousse 11 Fabienne Lohou 11 Céline Mari 11 Hans Schlager 12 Alfons Schwarzenboeck 13 Bianca Adler 2 Leonard Amekudzi 6 Jeffrey Aryee 6 Muritala Ayoola 9 Anneke M. Batenburg 14 Geoffrey Bessardon 3, 15 Stephan Borrmann 14 Joël Brito 13 Keith N. Bower 5 Frédéric Burnet 16 Valéry Catoire 17 Aurélie Colomb 13 Claude Denjean 16 Kwabena Fosu-Amankwah 6 Peter G. Hill 4 James Lee 7 Marie Lothon 11 Marlon Maranan 18 John Marsham 3 Rémi Meynadier 1 Jean-Blaise Ngamini 19 Philip Rosenberg 20 Daniel Sauer 12 Victoria Smith 20 Greta Stratmann 12 Jonathan W. Taylor 5 Christiane Voigt 12 Véronique Yoboué 10
Abstract : Unprecedented ground-based and aircraft measurements in June-July 2016 in southern West Africa characterize atmospheric composition and dynamics, low-level cloud properties, the diurnal cycle, and air pollution impacts on health. The EU-funded project DACCIWA (Dynamics-Aerosol-Chemistry-Cloud Interactions in West Africa) investigates the relationship between weather, climate, and air pollution in southern West Africa, an area with rapid population growth, urbanisation, and increase in anthropogenic aerosol emissions. The air over this region contains a unique mixture of natural and anthropogenic gases, liquid droplets and particles, emitted in an environment, in which multi-layer clouds frequently form. These exert a large influence on the local weather and climate, mainly due to their impact on radiation, the surface energy balance, and thus the diurnal cycle of the atmospheric boundary layer. In June and July 2016, DACCIWA organized a major international field campaign in Ivory Coast, Ghana, Togo, Benin, and Nigeria. Three supersites in Kumasi, Savè, and Ile-Ife conducted permanent measurements and 15 Intensive observation periods. Three European aircraft together flew 50 research flights between 27 June and 16 July 2016 for a total of 155 hours. DACCIWA scientists launched weather balloons several times a day across the region (772 in total), measured urban emissions, and evaluated health data. The main objective was to build robust statistics of atmospheric composition, dynamics, and low-level cloud properties in various chemical landscapes to investigate their mutual interactions. This article presents an overview of the DACCIWA field campaign activities as well as some first research highlights. The rich data obtained during the campaign will be made available to the scientific community and help to advance scientific understanding, modeling, and monitoring the atmosphere over southern West Africa.
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Cyrille Flamant, Peter Knippertz, Andreas H. Fink, Aristide Akpo, Barbara J. Brooks, et al.. The Dynamics-Aerosol-Chemistry-Cloud Interactions in West Africa field campaign: Overview and research highlights. Bulletin of the American Meteorological Society, American Meteorological Society, 2018, 99 (1), pp.83-104. ⟨10.1175/BAMS-D-16-0256.1⟩. ⟨insu-01564453⟩



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