气候变化领域集成服务门户(CCPortal): Biogenic and anthropogenic sources of isoprene and monoterpenes and theirsecondary organic aerosol in Delhi, India

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DOI	10.5194/acp-23-61-2023
	Biogenic and anthropogenic sources of isoprene and monoterpenes and theirsecondary organic aerosol in Delhi, India
	Bryant, Daniel J.; Nelson, Beth S.; Swift, Stefan J.; Budisulistiorini, Sri Hapsari; Drysdale, Will S.; Vaughan, Adam R.; Newland, Mike J.; Hopkins, James R.; Cash, James M.; Langford, Ben; Nemitz, Eiko; Acton, W. Joe F.; Hewitt, C. Nicholas; Mandal, Tuhin; Gurjar, Bhola R.; Shivani; Gadi, Ranu; Lee, James D.; Rickard, Andrew R.; Hamilton, Jacqueline F.
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	61
结束页码	83
卷号	23 期号:1 页码:23
英文摘要	Isoprene and monoterpene emissions to the atmosphere are generally dominated by biogenic sources. The oxidation of these compounds can lead to the production of secondary organic aerosol; however the impact of this chemistry in polluted urban settings has been poorly studied. Isoprene and monoterpenes can form secondary organic aerosol (SOA) heterogeneously via anthropogenic-biogenic interactions, resulting in the formation of organosulfate (OS) and nitrooxy-organosulfate (NOS) species. Delhi, India, is one of the most polluted cities in the world, but little is known about the emissions of biogenic volatile organic compounds (VOCs) or the sources of SOA. As part of the DELHI-FLUX project, gas-phase mixing ratios of isoprene and speciated monoterpenes were measured during pre- and post-monsoon measurement campaigns in central Delhi. Nocturnal mixing ratios of the VOCs were substantially higher during the post-monsoon (isoprene: (0.65 +/- 0.43) ppbv; limonene: (0.59 +/- 0.11) ppbv; alpha-pinene: (0.13 +/- 0.12) ppbv) than the pre-monsoon (isoprene: (0.13 +/- 0.18) ppbv; limonene: 0.011 +/- 0.025 (ppbv); alpha-pinene: 0.033 +/- 0.009) period. At night, isoprene and monoterpene concentrations correlated strongly with CO during the post-monsoon period. Filter samples of particulate matter less than 2.5 mu m in diameter (PM2.5) were collected and the OS and NOS content analysed using ultra-high-performance liquid chromatography tandem mass spectrometry (UHPLC-MS2). Inorganic sulfate was shown to facilitate the formation of isoprene OS species across both campaigns. Sulfate contained within OS and NOS species was shown to contribute significantly to the sulfate signal measured via AMS. Strong nocturnal enhancements of NOS species were observed across both campaigns. The total concentration of OS and NOS species contributed an average of (2.0 +/- 0.9) % and (1.8 +/- 1.4) % to the total oxidized organic aerosol and up to a maximum of 4.2 % and 6.6 % across the pre- and post-monsoon periods, respectively. Overall, this study provides the first molecular-level measurements of SOA derived from isoprene and monoterpene in Delhi and demonstrates that both biogenic and anthropogenic sources of these compounds can be important in urban areas.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000906754100001
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/273909
作者单位	University of York - UK; UK Research & Innovation (UKRI); Natural Environment Research Council (NERC); NERC National Centre for Atmospheric Science; University of York - UK; UK Centre for Ecology & Hydrology (UKCEH); University of Edinburgh; Lancaster University; Indira Gandhi Delhi Technical University for Women (IGDTUW); Czech Academy of Sciences; J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences; Centre National de la Recherche Scientifique (CNRS); University of Birmingham; University of Delhi
推荐引用方式 GB/T 7714	Bryant, Daniel J.,Nelson, Beth S.,Swift, Stefan J.,et al. Biogenic and anthropogenic sources of isoprene and monoterpenes and theirsecondary organic aerosol in Delhi, India[J],2023,23(1):23.
APA	Bryant, Daniel J..,Nelson, Beth S..,Swift, Stefan J..,Budisulistiorini, Sri Hapsari.,Drysdale, Will S..,...&Hamilton, Jacqueline F..(2023).Biogenic and anthropogenic sources of isoprene and monoterpenes and theirsecondary organic aerosol in Delhi, India.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(1),23.
MLA	Bryant, Daniel J.,et al."Biogenic and anthropogenic sources of isoprene and monoterpenes and theirsecondary organic aerosol in Delhi, India".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.1(2023):23.