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Verlagsausgabe
DOI: 10.5445/IR/1000085543
Veröffentlicht am 28.08.2018
Originalveröffentlichung
DOI: 10.5194/acp-18-12363-2018

Aerosol distribution in the northern Gulf of Guinea: local anthropogenic sources, long-range transport, and the role of coastal shallow circulations

Flamant, Cyrille; Deroubaix, Adrien; Chazette, Patrick; Brito, Joel; Gaetani, Marco; Knippertz, Peter; Fink, Andreas H.; de Coetlogon, Gaëlle; Menut, Laurent; Colomb, Aurélie; Denjean, Cyrielle; Meynadier, Rémi; Rosenberg, Philip; Dupuy, Regis; Dominutti, Pamela; Duplissy, Jonathan; Bourrianne, Thierry; Schwarzenboeck, Alfons; Ramonet, Michel; Totems, Julien

Abstract:
The complex vertical distribution of aerosols over coastal southern West Africa (SWA) is investigated using airborne observations and numerical simulations. Observations were gathered on 2 July 2016 offshore of Ghana and Togo, during the field phase of the Dynamics-Aerosol-Chemistry-Cloud Interactions in West Africa project. This was the only flight conducted over the ocean during which a downward-looking lidar was operational. The aerosol loading in the lower troposphere includes emissions from coastal cities (Accra, Lomé, Cotonou, and Lagos) as well as biomass burning aerosol and dust associated with long-range transport from central Africa and the Sahara, respectively. Our results indicate that the aerosol distribution on this day is impacted by subsidence associated with zonal and meridional regional-scale overturning circulations associated with the land–sea surface temperature contrast and orography over Ghana and Togo, as typically observed on hot, cloud-free summer days such as 2 July 2016. Furthermore, we show that the zonal circulation evidenced on 2 July is a persistent feature over the Gulf of Guinea during July 2016. Nu ... mehr


Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Forschungsbereich Troposphäre (IMK-TRO)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 1680-7324
URN: urn:nbn:de:swb:90-855439
KITopen ID: 1000085543
HGF-Programm 12.01.02; LK 01
Erschienen in Atmospheric chemistry and physics
Band 18
Heft 16
Seiten 12363–12389
Vorab online veröffentlicht am 27.08.2018
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