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DOI	10.1016/j.scitotenv.2020.139300
	Emissions vs. turbulence and atmospheric stability: A study of their relative importance in determining air pollutant concentrations
	Yuval; Tritscher T.; Raz R.; Levi Y.; Levy I.; Broday D.M.
发表日期	2020
ISSN	489697
卷号	733
英文摘要	Air pollution in the urban environment is a major concern. The ambient concentrations depend on the levels of transboundary imported pollution, the intensity of local sources and the prevailing atmospheric conditions. This work studies the relative impact of two atmospheric variables–atmospheric stability and regional scale turbulence–in determining the air pollution concentrations. We considered a setting (downtown Haifa, Israel) impacted by a large variety of sources, emitting pollutants with different chemical attributes and atmospheric life times. We found that traffic accounts for most of the locally produced pollution in the study location. However, the meteorological factors can overwhelm its impact and dictate the concentrations. The switch from stable to convective conditions and the more vigorous daytime wind are associated with a premature end of the morning peak concentrations that result from rush hour emissions of NOx, Black Carbon (BC) and ultra–fine particles. It results in daytime concentration which are lower than (winter) or equal to (summer) those at night, in spite of the much lower night–time traffic volumes. Similar, albeit weaker, impact was detected in the benzene and toluene concentrations. Sources outside the study area are responsible for most of the CO, PM1 and PM2.5 concentrations but during winter nights, characterised by strong atmospheric stability and low turbulence, their concentrations are elevated due to the local emissions. We developed a diagnostic statistical nonlinear model for the pollutant concentrations, which points to a stronger association of the atmospheric stability with the concentrations during stable conditions but turbulence dominating during convective conditions. Our findings explain the relatively low overall concentrations of locally emitted pollutants in the study area but warn of the potential for high concentrations during night–time in locations with comparable meteorological conditions. © 2020 Elsevier B.V.
英文关键词	Air pollution; Atmospheric stability; Regional scale turbulence; Temperature lapse rate
scopus关键词	Air pollution; Atmospheric chemistry; Atmospheric thermodynamics; Stability; Air pollutant concentrations; Ambient concentrations; Atmospheric conditions; Daytime concentration; Meteorological condition; Meteorological factors; Pollutant concentration; Pollution concentration; Atmospheric turbulence; benzene; black carbon; cobalt; nitrogen oxide; non methane volatile organic compound; organic compound; sulfur dioxide; toluene; unclassified drug; air quality; atmospheric convection; atmospheric pollution; carbon emission; concentration (composition); traffic emission; turbulence; air pollutant; air pollution; Article; atmosphere; concentration (parameter); controlled study; cosmological phenomena; daytime; environmental impact; Israel; meteorological phenomena; night; particulate matter; priority journal; seasonal variation; summer; traffic; traffic noise; winter; Haifa [Israel]; Israel
来源期刊	Science of the Total Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176824
作者单位	Department of Civil and Environmental Engineering, Technion, Israel Institute of Technology, Haifa, 32000, Israel; TSI GmbH, Particle Instruments, Neukoellner Str. 4, Aachen, 52068, Germany; Braun School of Public Health and Community Medicine, The Hebrew University of Jerusalem, Israel; Israel Meteorological Service, P.O. Box 25, Bet Dagan, 5025001, Israel; Air quality and Climate Change Division, Ministry of Environmental Protection, State of Israel, 125 Menachem Begin Road, Tel Aviv, 61071, Israel
推荐引用方式 GB/T 7714	Yuval,Tritscher T.,Raz R.,et al. Emissions vs. turbulence and atmospheric stability: A study of their relative importance in determining air pollutant concentrations[J],2020,733.
APA	Yuval,Tritscher T.,Raz R.,Levi Y.,Levy I.,&Broday D.M..(2020).Emissions vs. turbulence and atmospheric stability: A study of their relative importance in determining air pollutant concentrations.Science of the Total Environment,733.
MLA	Yuval,et al."Emissions vs. turbulence and atmospheric stability: A study of their relative importance in determining air pollutant concentrations".Science of the Total Environment 733(2020).