气候变化领域集成服务门户(CCPortal): Physico-chemical characterization of urban aerosols from specific combustion sources in West Africa at Abidjan in Côte d'Ivoire and Cotonou in Benin in the frame of the DACCIWA program

CCPortal

DOI	10.5194/acp-20-5327-2020
	Physico-chemical characterization of urban aerosols from specific combustion sources in West Africa at Abidjan in Côte d'Ivoire and Cotonou in Benin in the frame of the DACCIWA program
	Jacques Adon A.; Liousse C.; Thierno Doumbia E.; Baeza-Squiban A.; Cachier H.; Léon J.-F.; Yoboué V.; Barthel Akpo A.; Galy-Lacaux C.; Guinot B.; Zouiten C.; Xu H.; Gardrat E.; Keita S.
发表日期	2020
ISSN	1680-7316
起始页码	5327
结束页码	5354
卷号	20 期号:9
英文摘要	Urban air pollution in West Africa has yet to be well characterized. In the frame of DACCIWA (Dynamics- Aerosol-Chemistry-Cloud Interactions in West Africa) program, intensive measurement campaigns were performed in Abidjan (Cote d fIvoire) and Cotonou (Benin), in dry (January 2016 and 2017) and wet (July 2015 and 2016) seasons, at different sites chosen to be representative of African urban combustion sources, i.e., domestic fires (ADF), traffic (AT) and waste burning (AWB) sources in Abidjan and traffic source in Cotonou (CT). Both the size distribution of particulate matter (PM) and their chemical composition including elemental carbon (EC), organic carbon (OC), water-soluble organic carbon (WSOC), water-soluble inorganic ions (WSI) and trace metals were examined. Results show very high PM concentrations at all sites and a well-marked seasonality as well as a strong spatial variation. The average PM2.5 mass concentrations during the wet season are 517.3, 104.1, 90.3, and 69.1 μgm-3 at the ADF, CT, AT, and AWB sites, respectively. In the dry season, PM2.5 concentrations decrease to 375.7 μgm-3 at the ADF site, while they increase to 269.7, 141.3, and 175.3 μgm-3 at the CT, AT, and AWB sites, respectively. The annual PM2.5 levels at almost all sites are significantly higher than the WHO guideline level of 10 μgm-3. As for PM mass, (EC) and (OC) concentrations are also maximal at the ADF site, accounting for up to 69% of the total PM mass. Such a high content is mainly linked to wood burning for domestic cooking and commercial food smoking activities. Dust contributions are dominant at CT (57 %. 80 %), AT (20 %.70 %), and AWB (30 %.69 %) sites and especially in the coarse and fine-particle modes at the CT site and in the coarse fraction at the AT site, which may be explained by the impact of long-range desert-dust transport and resuspended particles from the roads, in addition to anthropogenic sources. The contributions of WSI to the total PM mass, mainly driven by chloride, nitrate, and calcium in the fine and/or large particles, are highly variable according to the sites but remain less than 30 %. Values are generally 1. 3 times higher in the wet season than in the dry season. This is due not only to anthropogenic emissions but also to nitrate formation by reaction processes and natural emissions. The concentrations of trace elements reflect well the trends in dust at the traffic and AWB sites, with a predominance of Al, Na, Ca, Fe, and K, keys markers of crustal dust. This study constitutes an original database that characterizes specific African combustion sources. © 2020 BMJ Publishing Group. All rights reserved.
英文关键词	aerosol; anthropogenic source; atmospheric pollution; chemical composition; combustion; long range transport; particulate matter; physicochemical property; size distribution; urban atmosphere; urban pollution; Abidjan; Benin [West Africa]; Cote d'Ivoire; Cotonou; Littoral [Benin]
语种	英语
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/168965
作者单位	Laboratoire d'Aérologie, Université de Toulouse, CNRS, UPS, Toulouse, France; Centre National de Recherche Météorologiques (CNRM) UMR 3589, Météo-France/CNRS, Toulouse, France; Réponses Moléculaires et Cellulaires Aux Xénobiotiques_RMCX, Université Paris Diderot, Unité de Biologie Fonctionnelle et Adaptative-RMCX, CNRS, UMR 8251, Paris, France; Laboratoire de Physique de l'Atmosphère, Université Félix Houphouët-Boigny, Abidjan, BPV 34, Cote d'Ivoire; Laboratoire de Physique du Rayonnement, Université d'Abomey-Calavi, Abomey-Calavi, Benin; Géosciences Environnement Toulouse, Université de Toulouse, CNRS, UPS, Toulouse, France; Department of Environmental Science and Engineering, Xi'An Jiaotong University, Xi'an, China; UFR Sciences Biologiques, Université Péléforo-Gbon-Coulibaly de Khorogo, Khorogo, BP 1328, Cote d'Ivoire
推荐引用方式 GB/T 7714	Jacques Adon A.,Liousse C.,Thierno Doumbia E.,et al. Physico-chemical characterization of urban aerosols from specific combustion sources in West Africa at Abidjan in Côte d'Ivoire and Cotonou in Benin in the frame of the DACCIWA program[J],2020,20(9).
APA	Jacques Adon A..,Liousse C..,Thierno Doumbia E..,Baeza-Squiban A..,Cachier H..,...&Keita S..(2020).Physico-chemical characterization of urban aerosols from specific combustion sources in West Africa at Abidjan in Côte d'Ivoire and Cotonou in Benin in the frame of the DACCIWA program.Atmospheric Chemistry and Physics,20(9).
MLA	Jacques Adon A.,et al."Physico-chemical characterization of urban aerosols from specific combustion sources in West Africa at Abidjan in Côte d'Ivoire and Cotonou in Benin in the frame of the DACCIWA program".Atmospheric Chemistry and Physics 20.9(2020).