气候变化领域集成服务门户(CCPortal): In situ ozone production is highly sensitive to volatile organic compounds in Delhi, India

CCPortal

DOI	10.5194/acp-21-13609-2021
	In situ ozone production is highly sensitive to volatile organic compounds in Delhi, India
	Nelson B.S.; Stewart G.J.; Drysdale W.S.; Newland M.J.; Vaughan A.R.; Dunmore R.E.; Edwards P.M.; Lewis A.C.; Hamilton J.F.; Acton W.J.; Hewitt C.N.; Crilley L.R.; Alam M.S.; Åahin Ü.A.; Beddows D.C.S.; Bloss W.J.; Slater E.; Whalley L.K.; Heard D.E.; Cash J.M.; Langford B.; Nemitz E.; Sommariva R.; Cox S.; Shivani; Gadi R.; Gurjar B.R.; Hopkins J.R.; Rickard A.R.; Lee J.D.
发表日期	2021
ISSN	1680-7316
起始页码	13609
结束页码	13630
卷号	21 期号:17
英文摘要	The Indian megacity of Delhi suffers from some of the poorest air quality in the world. While ambient NO2 and particulate matter (PM) concentrations have received considerable attention in the city, high ground-level ozone (O3) concentrations are an often overlooked component of pollution. O3 can lead to significant ecosystem damage and agricultural crop losses, and adversely affect human health. During October 2018, concentrations of speciated non-methane hydrocarbon volatile organic compounds (C2-C13), oxygenated volatile organic compounds (o-VOCs), NO, NO2, HONO, CO, SO2, O3, and photolysis rates, were continuously measured at an urban site in Old Delhi. These observations were used to constrain a detailed chemical box model utilising the Master Chemical Mechanism v3.3.1. VOCs and NOx (NO + NO2) were varied in the model to test their impact on local O3 production rates, P(O3), which revealed a VOC-limited chemical regime. When only NOx concentrations were reduced, a significant increase in P(O3) was observed; thus, VOC co-reduction approaches must also be considered in pollution abatement strategies. Of the VOCs examined in this work, mean morning P(O3) rates were most sensitive to monoaromatic compounds, followed by monoterpenes and alkenes, where halving their concentrations in the model led to a 15.6 %, 13.1 %, and 12.9 % reduction in P(O3), respectively. P(O3) was not sensitive to direct changes in aerosol surface area but was very sensitive to changes in photolysis rates, which may be influenced by future changes in PM concentrations. VOC and NOx concentrations were divided into emission source sectors, as described by the Emissions Database for Global Atmospheric Research (EDGAR) v5.0 Global Air Pollutant Emissions and EDGAR v4.3.2_VOC_spec inventories, allowing for the impact of individual emission sources on P(O3) to be investigated. Reducing road transport emissions only, a common strategy in air pollution abatement strategies worldwide, was found to increase P(O3), even when the source was removed in its entirety. Effective reduction in P(O3) was achieved by reducing road transport along with emissions from combustion for manufacturing and process emissions. Modelled P(O3) reduced by ∼1/4 20 ppb h-1 when these combined sources were halved. This study highlights the importance of reducing VOCs in parallel with NOx and PM in future pollution abatement strategies in Delhi. © 2021 Beth S. Nelson et al.
语种	英语
scopus关键词	aerosol; air quality; atmospheric pollution; concentration (composition); in situ measurement; ozone; particulate matter; source apportionment; volatile organic compound; 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/246586
作者单位	Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, Heslington, York, YO10 5DD, United Kingdom; National Centre for Atmospheric Science, University of York, Heslington, York, YO10 5DD, United Kingdom; Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YW, United Kingdom; School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, United Kingdom; Istanbul Üniversitesi, Cerrahpaşa Mühendislik Fakültesi, Üniversite Mahallesi Bailariçi Caddesi No:7, Avcllar, Istanbul, 34320, Turkey; School of Chemistry, University of Leeds, Leeds, LS2 9JT, United Kingdom; National Centre for Atmospheric Science, University of Leeds, Leeds, LS2 9JT, United Kingdom; UK Centre for Ecology and Hydrology, Penicuik, Midlothian, Edinburgh, EH26 0QB, United Kingdom; Research Software Engineering Team, University of Leicester, Leicester, LE1 7RH, United Kingdom; Department of Applied Sciences and Humanities, Indira Gandhi Delhi Technical Un...
推荐引用方式 GB/T 7714	Nelson B.S.,Stewart G.J.,Drysdale W.S.,et al. In situ ozone production is highly sensitive to volatile organic compounds in Delhi, India[J],2021,21(17).
APA	Nelson B.S..,Stewart G.J..,Drysdale W.S..,Newland M.J..,Vaughan A.R..,...&Lee J.D..(2021).In situ ozone production is highly sensitive to volatile organic compounds in Delhi, India.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(17).
MLA	Nelson B.S.,et al."In situ ozone production is highly sensitive to volatile organic compounds in Delhi, India".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.17(2021).