气候变化领域集成服务门户(CCPortal): Traffic-induced multicomponent ultrafine particle microphysics in the WRF v3.6.1 large eddy simulation model: General behaviour from idealised scenarios at the neighbourhood-scale

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DOI	10.1016/j.atmosenv.2019.117213
	Traffic-induced multicomponent ultrafine particle microphysics in the WRF v3.6.1 large eddy simulation model: General behaviour from idealised scenarios at the neighbourhood-scale
	Zhong J.; Nikolova I.; Cai X.; MacKenzie A.R.; Alam M.S.; Xu R.; Singh A.; Harrison R.M.
发表日期	2020
ISSN	1352-2310
卷号	223
英文摘要	Traffic is the key source of ultrafine particles (UFPs, particulate matter with a diameter less than 0.1 μm or 100 nm) in most urban areas. The traffic-generated UFPs vented out from an urban street mix with overlying ‘urban background air’ and are diluted whilst also undergoing change due to condensation/evaporation and other aerosol microphysics. Traffic-generated UFPs are comprised of a complex mixture of semi-volatile compounds (SVOCs) with volatility varying over many orders of magnitude, resulting in size-dependent particle composition. This study coupled the multicomponent microphysics (involving condensation/evaporation) of UFPs with the WRF v3.6.1 (Weather Research and Forecasting) large eddy simulation model (i.e. WRF-LES-UFP), and used this modelling system to investigate the general behaviour of UFPs on the neighbourhood scale (10-1000 m; transport times of few minutes) for idealised scenarios. The model captures the horizontal dispersion of UFPs downwind into the neighbourhood scale and vertical mixing with urban background air. Evaporation decreases the mode size of UFPs venting into the urban boundary layer from street-level. The neighbourhood-scale evolution of UFPs is, therefore, a combination of the effects of emissions, mixing with background, and condensation/evaporation. Total UFP number concentration and total mass concentrations scale linearly with the emission rate or the background concentration, demonstrating numerical conservation of the scheme. The linearity is less pronounced for the number concentration of smaller particles (UFP diameter less than 100 nm) with respect to UFP size and concentrations of those organic compounds with a time scale comparable to the dilution time scale (in the order of minutes), reflecting the effects (altering the particle sizes) due to condensation/evaporation. © 2019 Elsevier Ltd
英文关键词	Aerosol microphysics; Atmospheric nanoparticles; Semi-volatiles; Urban pollution; Urban street
语种	英语
scopus关键词	Aerosols; Boundary layers; Condensation; Mixing; Particulate emissions; Pollution; Volatile organic compounds; Weather forecasting; Background concentration; Condensation/evaporation; Microphysics; Semi-volatiles; Semivolatile compounds; Urban pollutions; Urban streets; Weather research and forecasting; Large eddy simulation; organic compound; volatile agent; aerosol; boundary layer; concentration (composition); dispersion; large eddy simulation; nanoparticle; neighborhood; particulate matter; urban pollution; aerosol; boundary layer; chemical composition; computer simulation; dispersion; evaporation; exhaust gas; forecasting; mathematical analysis; neighborhood; neighbourhood scale; particle size; particulate matter; priority journal; rating scale; traffic noise; ultrafine particle; urban area
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129624
作者单位	School of Geography, Earth & Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom; Birmingham Institute of Forest Research, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
推荐引用方式 GB/T 7714	Zhong J.,Nikolova I.,Cai X.,et al. Traffic-induced multicomponent ultrafine particle microphysics in the WRF v3.6.1 large eddy simulation model: General behaviour from idealised scenarios at the neighbourhood-scale[J],2020,223.
APA	Zhong J..,Nikolova I..,Cai X..,MacKenzie A.R..,Alam M.S..,...&Harrison R.M..(2020).Traffic-induced multicomponent ultrafine particle microphysics in the WRF v3.6.1 large eddy simulation model: General behaviour from idealised scenarios at the neighbourhood-scale.Atmospheric Environment,223.
MLA	Zhong J.,et al."Traffic-induced multicomponent ultrafine particle microphysics in the WRF v3.6.1 large eddy simulation model: General behaviour from idealised scenarios at the neighbourhood-scale".Atmospheric Environment 223(2020).