globalchange  > 气候变化与战略
DOI: 10.1016/j.atmosenv.2019.117213
论文题名:
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
作者: Zhong J.; Nikolova I.; Cai X.; MacKenzie A.R.; Alam M.S.; Xu R.; Singh A.; Harrison R.M.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 223
语种: 英语
英文关键词: 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
学科: Aerosol microphysics ; Atmospheric nanoparticles ; Semi-volatiles ; Urban pollution ; Urban street
中文摘要: 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
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160574
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


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

Recommended Citation:
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]. Atmospheric Environment,2020-01-01,223
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Zhong J.]'s Articles
[Nikolova I.]'s Articles
[Cai X.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Zhong J.]'s Articles
[Nikolova I.]'s Articles
[Cai X.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Zhong J.]‘s Articles
[Nikolova I.]‘s Articles
[Cai X.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.