气候变化领域集成服务门户(CCPortal): Diurnal cycle of coastal anthropogenic pollutant transport over southern West Africa during the DACCIWA campaign

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DOI	10.5194/acp-19-473-2019
	Diurnal cycle of coastal anthropogenic pollutant transport over southern West Africa during the DACCIWA campaign
	Deroubaix A.; Menut L.; Flamant C.; Brito J.; Denjean C.; Dreiling V.; Fink A.; Jambert C.; Kalthoff N.; Knippertz P.; Ladkin R.; Mailler S.; Maranan M.; Pacifico F.; Piguet B.; Siour G.; Turquety S.
发表日期	2019
ISSN	16807316
起始页码	473
结束页码	497
卷号	19 期号:1
英文摘要	During the monsoon season, pollutants emitted by large coastal cities and biomass burning plumes originating from central Africa have complex transport pathways over southern West Africa (SWA). The Dynamics-Aerosol-Chemistry-Cloud Interactions in West Africa (DACCIWA) field campaign has provided numerous dynamical and chemical measurements in and around the super-site of Savè in Benin (≈ 185km away from the coast), which allows quantification of the relative contribution of advected pollutants. Through the combination of in situ ground measurements with aircraft, radio-sounding, satellite, and high-resolution chemistry-transport modeling with the CHIMERE model, the source attribution and transport pathways of pollutants inland (here, NOx and CO) are carefully analyzed for the 1-7 July 2016 period. The relative contributions of different sources (i.e., emissions from several large coastal cities) to the air quality in Savè are characterized. It is shown that a systematic diurnal cycle exists with high surface concentrations of pollutants from 18:00 to 22:00UTC. This evening peak is attributed to pollution transport from the coastal city of Cotonou (Benin). Numerical model experiments indicate that the anthropogenic pollutants are accumulated during the day close to the coast and transported northward as soon as the daytime convection in the atmospheric boundary layer ceases after 16:00UTC, reaching 8°N at 21:00UTC. When significant biomass burning pollutants are transported into continental SWA, they are mixed with anthropogenic pollutants along the coast during the day, and this mixture is then transported northward. At night, most of the coastal anthropogenic plumes are transported within the planetary boundary layer (below about 500m above ground level), whereas the biomass burning pollutants are mostly transported above it, thus generally not impacting ground level air quality. © 2019 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	anthropogenic source; atmospheric plume; biomass burning; boundary layer; coastal zone; diurnal variation; pollutant transport; Benin [West Africa]; Cotonou; Littoral [Benin]
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144722
作者单位	LMD/IPSL, Laboratoire de Météorologie Dynamique, Ecole Polytechnique, IPSL Research University, Ecole Normale Supérieure, Université Paris-Saclay, Sorbonne Universités, UPMC Univ Paris 06, CNRS, Route de Saclay, Palaiseau, 91128, France; LATMOS/IPSL, Sorbonne Université, Université Paris-Saclay, CNRS, Paris, France; LISA/IPSL, Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR CNRS 7583, Université Paris Est Créteil, Université Paris Diderot, Institut Pierre Simon Laplace, Créteil, France; LA, Laboratoire D Aérologie, University of Toulouse, CNRS, UPS, Toulouse, France; KIT, Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Germany; CNRM, Centre National de la Recherche Météorologique, UMR3589, CNRS, Météo-France, Toulouse, France; DLR, Deutsches Zentrum für Luft- und Raumfahrt, Oberpfaffenhofen, Germany; BAS, British Antarctic Survey, Cambridge, United Kingdom; LAMP, Laboratoire de Météorologie Physique, Université Clermont Auvergne, Aubière, France
推荐引用方式 GB/T 7714	Deroubaix A.,Menut L.,Flamant C.,et al. Diurnal cycle of coastal anthropogenic pollutant transport over southern West Africa during the DACCIWA campaign[J],2019,19(1).
APA	Deroubaix A..,Menut L..,Flamant C..,Brito J..,Denjean C..,...&Turquety S..(2019).Diurnal cycle of coastal anthropogenic pollutant transport over southern West Africa during the DACCIWA campaign.Atmospheric Chemistry and Physics,19(1).
MLA	Deroubaix A.,et al."Diurnal cycle of coastal anthropogenic pollutant transport over southern West Africa during the DACCIWA campaign".Atmospheric Chemistry and Physics 19.1(2019).