气候变化领域集成服务门户(CCPortal): Low-NO atmospheric oxidation pathways in a polluted megacity

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DOI	10.5194/acp-21-1613-2021
	Low-NO atmospheric oxidation pathways in a polluted megacity
	Newland M.J.; Bryant D.J.; Dunmore R.E.; Bannan T.J.; Joe F. Acton W.; Langford B.; Hopkins J.R.; Squires F.A.; Dixon W.; Drysdale W.S.; Ivatt P.D.; Evans M.J.; Edwards P.M.; Whalley L.K.; Heard D.E.; Slater E.J.; Woodward-Massey R.; Ye C.; Mehra A.; Worrall S.D.; Bacak A.; Coe H.; Percival C.J.; Nicholas Hewitt C.; Lee J.D.; Cui T.; Surratt J.D.; Wang X.; Lewis A.C.; Rickard A.R.; Hamilton J.F.
发表日期	2021
ISSN	1680-7316
起始页码	1613
结束页码	1625
卷号	21 期号:3
英文摘要	The impact of emissions of volatile organic compounds (VOCs) to the atmosphere on the production of secondary pollutants, such as ozone and secondary organic aerosol (SOA), is mediated by the concentration of nitric oxide (NO). Polluted urban atmospheres are typically considered to be "high-NO"environments, while remote regions such as rainforests, with minimal anthropogenic influences, are considered to be "low NO". However, our observations from central Beijing show that this simplistic separation of regimes is flawed. Despite being in one of the largest megacities in the world, we observe formation of gas- and aerosol-phase oxidation products usually associated with low-NO "rainforest-like"atmospheric oxidation pathways during the afternoon, caused by extreme suppression of NO concentrations at this time. Box model calculations suggest that during the morning high-NO chemistry predominates (95 %) but in the afternoon low-NO chemistry plays a greater role (30 %). Current emissions inventories are applied in the GEOS-Chem model which shows that such models, when run at the regional scale, fail to accurately predict such an extreme diurnal cycle in the NO concentration. With increasing global emphasis on reducing air pollution, it is crucial for the modelling tools used to develop urban air quality policy to be able to accurately represent such extreme diurnal variations in NO to accurately predict the formation of pollutants such as SOA and ozone. © 2021 Author(s).
语种	英语
scopus关键词	aerosol; atmospheric pollution; emission inventory; EOS; megacity; nitric oxide; oxidation; urban pollution; 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/247174
作者单位	Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, YO10-5DD, United Kingdom; School of Earth and Environmental Sciences, The University of Manchester, Manchester, M13-9PL, United Kingdom; Lancaster Environment Centre, Lancaster University, Lancaster, LA1-4YQ, United Kingdom; Centre for Ecology and Hydrology, Edinburgh, EH26-0QB, United Kingdom; National Centre for Atmospheric Science (NCAS), University of York, York, YO10-5DD, United Kingdom; School of Chemistry, University of Leeds, Leeds, LS2-9JT, United Kingdom; National Centre for Atmospheric Science, School of Chemistry, University of Leeds, Leeds, LS2-9JT, United Kingdom; Beijing Innovation Center for Engineering Science and Advanced Technology, State Key Joint Laboratory for Environmental Simulation and Pollution Control, Center for Environment and Health, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China; Department of Environmental Sciences and Engineering, Gil...
推荐引用方式 GB/T 7714	Newland M.J.,Bryant D.J.,Dunmore R.E.,et al. Low-NO atmospheric oxidation pathways in a polluted megacity[J],2021,21(3).
APA	Newland M.J..,Bryant D.J..,Dunmore R.E..,Bannan T.J..,Joe F. Acton W..,...&Hamilton J.F..(2021).Low-NO atmospheric oxidation pathways in a polluted megacity.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(3).
MLA	Newland M.J.,et al."Low-NO atmospheric oxidation pathways in a polluted megacity".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.3(2021).