气候变化领域集成服务门户(CCPortal): Anthropogenic VOCs in Abidjan; southern West Africa: From source quantification to atmospheric impacts

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DOI	10.5194/acp-19-11721-2019
	Anthropogenic VOCs in Abidjan; southern West Africa: From source quantification to atmospheric impacts
	Dominutti P.; Keita S.; Bahino J.; Colomb A.; Liousse C.; Yoboué V.; Galy-Lacaux C.; Morris E.; Bouvier L.; Sauvage S.; Borbon A.
发表日期	2019
ISSN	16807316
起始页码	11721
结束页码	11741
卷号	19 期号:18
英文摘要	Several field campaigns were conducted in the framework of the Dynamics-Aerosol-Chemistry-Cloud Interactions in West Africa (DACCIWA) project to measure a broad range of atmospheric constituents. Here we present the analysis of an unprecedented and comprehensive dataset integrating up to 56 volatile organic compounds (VOCs) from ambient sites and emission sources. VOCs were collected on multi-sorbent tubes in the coastal city of Abidjan, Côte d'Ivoire, in winter and summer 2016 and later analysed by gas chromatography coupled with flame ionization and mass spectrometer detectors (GC-FID and GC-MS) at the laboratory. The comparison between VOC emission source profiles and ambient profiles suggests the substantial impact of two-stroke motorized two-wheel vehicles and domestic fires on the composition of Abidjan's atmosphere. However, despite high VOC concentrations near-source, moderate ambient levels were observed (by factors of 10 to 4000 lower), similar to the concentrations observed in northern mid-latitude urban areas. Besides photochemistry, the reported high wind speeds seem to be an essential factor that regulates air pollution levels in Abidjan. Emission ratios (ΔVOC/CO) were established based on real-world measurements achieved for a selected number of representative combustion sources. Maximum measured molar mass emissions were observed from two-wheel vehicles, surpassing other regional sources by 2 orders of magnitude. Local practices like waste burning also make a significant contribution to VOC emissions, higher than those from light-duty vehicles by 1.5 to 8 orders of magnitude. These sources also largely govern the VOC's atmospheric impacts in terms of OH reactivity, secondary organic aerosol formation (SOAP), and photochemical ozone creation potential (POCP). While the contribution of aromatics dominates the atmospheric impact, our measurements reveal the systematic presence of anthropogenic terpenoids in all residential combustion sectors. Finally, emission factors were used to retrieve and quantify VOC emissions from the main anthropogenic source sectors at the national level. Our detailed estimation of VOC emissions suggests that the road transport sector is the dominant source in Côte d'Ivoire, emitting around 1200Gg yr-1 of gas-phase VOCs. These new estimates are 100 and 160 times larger than global inventory estimations from MACCity or EDGAR (v4.3.2), respectively. Additionally, the residential sector is largely underestimated in the global emission inventories, by factors of 13 to 43. Considering only Côte d'Ivoire, these new estimates for VOCs are 3 to 6 times higher than the whole of Europe. Given the significant underestimation of VOC emissions from the transport and residential sectors in Côte d'Ivoire, there is an urgent need to build more realistic and region-specific emission inventories for the entire West African region. This might be true not only for VOCs, but also for all atmospheric pollutants. The lack of waste burning, wood fuel burning and charcoal burning, and fabrication representation in regional inventories also needs to be addressed, particularly in low-income areas where these types of activities are ubiquitous sources of VOC emissions. © Author(s) 2019.
语种	英语
scopus关键词	anthropogenic source; atmospheric pollution; concentration (composition); emission inventory; urban area; volatile organic compound; Abidjan; Cote d'Ivoire
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/144142
作者单位	Université Clermont Auvergne, CNRS, Laboratoire de Météorologie Physique (LaMP), Clermont-Ferrand, 63000, France; Laboratoire d'Aérologie, Université Paul Sabatier Toulouse 3, CNRS, Toulouse, France; Université Péléforo Gon Coulibaly, Korhogo, Cote d'Ivoire; Laboratoire de Physique de l'Atmosphère (LAPA), Université Felix Houphouët-Boigny, Abidjan, Cote d'Ivoire; Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, Heslington, York, YO10 5DD, United Kingdom; IMT Lille Douai, Sciences de l'Atmosphère et Génie de l'Environnement (SAGE), Douai, France
推荐引用方式 GB/T 7714	Dominutti P.,Keita S.,Bahino J.,et al. Anthropogenic VOCs in Abidjan; southern West Africa: From source quantification to atmospheric impacts[J],2019,19(18).
APA	Dominutti P..,Keita S..,Bahino J..,Colomb A..,Liousse C..,...&Borbon A..(2019).Anthropogenic VOCs in Abidjan; southern West Africa: From source quantification to atmospheric impacts.Atmospheric Chemistry and Physics,19(18).
MLA	Dominutti P.,et al."Anthropogenic VOCs in Abidjan; southern West Africa: From source quantification to atmospheric impacts".Atmospheric Chemistry and Physics 19.18(2019).