气候变化领域集成服务门户(CCPortal): Seasonal analysis of submicron aerosol in Old Delhi using high-resolution aerosol mass spectrometry: Chemical characterisation, source apportionment and new marker identification

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DOI	10.5194/acp-21-10133-2021
	Seasonal analysis of submicron aerosol in Old Delhi using high-resolution aerosol mass spectrometry: Chemical characterisation, source apportionment and new marker identification
	Cash J.M.; Langford B.; Di Marco C.; Mullinger N.J.; Allan J.; Reyes-Villegas E.; Joshi R.; Heal M.R.; Acton W.J.F.; Hewitt C.N.; Misztal P.K.; Drysdale W.; Mandal T.K.; Shivani; Gadi R.; Gurjar B.R.; Nemitz E.
发表日期	2021
ISSN	1680-7316
起始页码	10133
结束页码	10158
卷号	21 期号:13
英文摘要	We present the first real-time composition of submicron particulate matter (PM1) in Old Delhi using high-resolution aerosol mass spectrometry (HR-AMS). Old Delhi is one of the most polluted locations in the world, and PM1 concentrations reached -1/4750μgm-3 during the most polluted period, the post-monsoon period, where PM1 increased by 188% over the pre-monsoon period. Sulfate contributes the largest inorganic PM1 mass fraction during the pre-monsoon (24%) and monsoon (24%) periods, with nitrate contributing most during the post-monsoon period (8%). The organics dominate the mass fraction (54%-68%) throughout the three periods, and, using positive matrix factorisation (PMF) to perform source apportionment analysis of organic mass, two burning-related factors were found to contribute the most (35%) to the post-monsoon increase. The first PMF factor, semi-volatility biomass burning organic aerosol (SVBBOA), shows a high correlation with Earth observation fire counts in surrounding states, which links its origin to crop residue burning. The second is a solid fuel OA (SFOA) factor with links to local open burning due to its high composition of polyaromatic hydrocarbons (PAHs) and novel AMS-measured marker species for polychlorinated dibenzodioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs). Two traffic factors were resolved: one hydrocarbon-like OA (HOA) factor and another nitrogen-rich HOA (NHOA) factor. The N compounds within NHOA were mainly nitrile species which have not previously been identified within AMS measurements. Their PAH composition suggests that NHOA is linked to diesel and HOA to compressed natural gas and petrol. These factors combined make the largest relative contribution to primary PM1 mass during the pre-monsoon and monsoon periods while contributing the second highest in the post-monsoon period. A cooking OA (COA) factor shows strong links to the secondary factor, semi-volatility oxygenated OA (SVOOA). Correlations with co-located volatile organic compound (VOC) measurements and AMS-measured organic nitrogen oxides (OrgNO) suggest SVOOA is formed from aged COA. It is also found that a significant increase in chloride concentrations (522%) from pre-monsoon to post-monsoon correlates well with SVBBOA and SFOA, suggesting that crop residue burning and open waste burning are responsible. A reduction in traffic emissions would effectively reduce concentrations across most of the year. In order to reduce the post-monsoon peak, sources such as funeral pyres, solid waste burning and crop residue burning should be considered when developing new air quality policy. © 2021 James M. Cash et al.
语种	英语
scopus关键词	aerosol; biomass burning; concentration (composition); mass spectrometry; PAH; particulate matter; seasonal variation; source apportionment; Delhi; India
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/246756
作者单位	UK Centre for Ecology and Hydrology, Edinburgh Research Station, Penicuik, EH26 0QB, United Kingdom; School of Chemistry, University of Edinburgh, Edinburgh, Edinburgh, EH9 3FJ, United Kingdom; Department of Earth and Environmental Sciences, University of Manchester, Manchester, M13 9PL, United Kingdom; Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, United Kingdom; Wolfson Atmospheric Chemistry Laboratory, University of York, York, YO10 5DD, United Kingdom; Council of Scientific and Industrial Research-National Physical Laboratory (CSIR-NPL), New Delhi, 110012, India; Department of Applied Sciences and Humanities, Indira Gandhi Delhi Technical University for Women, Delhi, 110006, India; Department of Civil Engineering, Indian Institute of Technology Roorkee, India; School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom; Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, T...
推荐引用方式 GB/T 7714	Cash J.M.,Langford B.,Di Marco C.,et al. Seasonal analysis of submicron aerosol in Old Delhi using high-resolution aerosol mass spectrometry: Chemical characterisation, source apportionment and new marker identification[J],2021,21(13).
APA	Cash J.M..,Langford B..,Di Marco C..,Mullinger N.J..,Allan J..,...&Nemitz E..(2021).Seasonal analysis of submicron aerosol in Old Delhi using high-resolution aerosol mass spectrometry: Chemical characterisation, source apportionment and new marker identification.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(13).
MLA	Cash J.M.,et al."Seasonal analysis of submicron aerosol in Old Delhi using high-resolution aerosol mass spectrometry: Chemical characterisation, source apportionment and new marker identification".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.13(2021).