气候变化领域集成服务门户(CCPortal): Measurement report: Source apportionment of volatile organic compounds at the remote high-altitude Maïdo observatory

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DOI	10.5194/acp-21-12965-2021
	Measurement report: Source apportionment of volatile organic compounds at the remote high-altitude Maïdo observatory
	Verreyken B.; Amelynck C.; Schoon N.; Müller J.-F.; Brioude J.; Kumps N.; Hermans C.; Metzger J.-M.; Colomb A.; Stavrakou T.
发表日期	2021
ISSN	1680-7316
起始页码	12965
结束页码	12988
卷号	21 期号:17
英文摘要	We present a source apportionment study of a near-continuous 2-year dataset of volatile organic compounds (VOCs), recorded between October 2017 and November 2019 with a quadrupole-based high-sensitivity proton-transfer-reaction mass-spectrometry (hs-PTR-MS) instrument deployed at the Maïdo observatory (21.1ĝ gS, 55.4ĝ gE, 2160gm altitude). The observatory is located on La Réunion island in the southwest Indian Ocean. We discuss seasonal and diel profiles of six key VOC species unequivocally linked to specific sources - acetonitrile (CH3CN), isoprene (C5H8), isoprene oxidation products (Iox), benzene (C6H6), C8-aromatic compounds (C8H10), and dimethyl sulfide (DMS). The data are analyzed using the positive matrix factorization (PMF) method and back-trajectory calculations based on the Lagrangian mesoscale transport model FLEXPART-AROME to identify the impact of different sources on air masses sampled at the observatory. As opposed to the biomass burning tracer CH3CN, which does not exhibit a typical diel pattern consistently throughout the dataset, we identify pronounced diel profiles with a daytime maximum for the biogenic (C5H8 and Iox) and anthropogenic (C6H6, C8H10) tracers. The marine tracer DMS generally displays a daytime maximum except for the austral winter when the difference between daytime and nighttime mixing ratios vanishes. Four factors were identified by the PMF: background/biomass burning, anthropogenic, primary biogenic, and secondary biogenic. Despite human activity being concentrated in a few coastal areas, the PMF results indicate that the anthropogenic source factor is the dominant contributor to the VOC load (38g%), followed by the background/biomass burning source factor originating in the free troposphere (33g%), and by the primary (15g%) and secondary biogenic (14g%) source factors. FLEXPART-AROME simulations showed that the observatory was most sensitive to anthropogenic emissions west of Maïdo while the strongest biogenic contributions coincided with air masses passing over the northeastern part of La Réunion. At night, the observatory is often located in the free troposphere, while during the day, the measurements are influenced by mesoscale sources. Interquartile ranges of nighttime 30gmin average mixing ratios of methanol (CH3OH), CH3CN, acetaldehyde (CH3CHO), formic acid (HCOOH), acetone (CH3COCH3), acetic acid (CH3COOH), and methyl ethyl ketone (MEK), representative for the atmospheric composition of the free troposphere, were found to be 525-887, 79-110, 61-101, 172-335, 259-379, 64-164, and 11-21gpptv, respectively. © Authors 2021.
语种	英语
scopus关键词	atmospheric chemistry; biomass burning; concentration (composition); mass spectrometry; source apportionment; tracer; volatile organic compound
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/246618
作者单位	Royal Belgian Institute for Space Aeronomy, Brussels, 1180, Belgium; Department of Chemistry, Ghent University, Ghent, 9000, Belgium; Laboratoire de l'Atmosphère et des Cyclones, UMR 8105, CNRS, Université de la Réunion, Météo France, Saint-Denis, 97744, France; Observatoire des Sciences de l'Univers de la Réunion, UMS3365, CNRS, Université de la Réunion, Météo-France, La Réunion, Saint-Denis, France; Laboratoire de Météorologie Physique, UMR 6016, CNRS, Université Clermont Auvergne, Aubière, 63178, France
推荐引用方式 GB/T 7714	Verreyken B.,Amelynck C.,Schoon N.,et al. Measurement report: Source apportionment of volatile organic compounds at the remote high-altitude Maïdo observatory[J],2021,21(17).
APA	Verreyken B..,Amelynck C..,Schoon N..,Müller J.-F..,Brioude J..,...&Stavrakou T..(2021).Measurement report: Source apportionment of volatile organic compounds at the remote high-altitude Maïdo observatory.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(17).
MLA	Verreyken B.,et al."Measurement report: Source apportionment of volatile organic compounds at the remote high-altitude Maïdo observatory".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.17(2021).