globalchange  > 气候变化事实与影响
DOI: 10.1016/j.atmosenv.2014.06.012
Scopus记录号: 2-s2.0-84902350273
论文题名:
Relationship between particulate air pollution and meteorological variables in Utah's Salt Lake Valley
作者: Whiteman C; D; , Hoch S; W; , Horel J; D; , Charland A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 94
起始页码: 742
结束页码: 753
语种: 英语
英文关键词: Climatology ; Inversions ; NAAQS exceedances ; Particulates ; Salt Lake Valley
Scopus关键词: Climatology ; Lakes ; Inversions ; Meteorological variables ; NAAQS exceedances ; National ambient air quality standards ; Particulate air pollution ; Particulates ; Salt Lake Valley ; Stepwise multiple linear regression ; Landforms ; atmospheric pollution ; climatology ; concentration (composition) ; high pressure ; meteorology ; particulate matter ; pollutant ; relative humidity ; air pollutant ; air pollution ; air quality ; article ; humidity ; meteorological phenomena ; multiple linear regression analysis ; particulate matter ; priority journal ; salt lake ; snow cover ; solar radiation ; United States ; winter ; Salt Lake Valley ; United States ; Utah
Scopus学科分类: Environmental Science: Water Science and Technology ; Earth and Planetary Sciences: Earth-Surface Processes ; Environmental Science: Environmental Chemistry
英文摘要: Critical meteorological factors affecting daily particulate concentrations during winter for Utah's urbanized Salt Lake Valley are examined on the basis of forty years of data. In a typical winter, the National Ambient Air Quality Standard for particulate matter with aerodynamic diameter less than 2.5 microns (PM2.5) is exceeded during 6 multi-day events comprising 18 winter days. Multi-day episodes of high stability produce these events, as synoptic-scale high-pressure ridges transit across Utah. The valley heat deficit, a bulk measure of atmospheric stability, exhibits large winter-to-winter variations that are highly related to similar variations in PM2.5. While control strategies have led to downward trends in concentrations for some primary pollutants, no long-term trends in valley heat deficit are evident over the 40 years. PM2.5 concentrations rise gradually over a period of days after a heat deficit threshold is exceeded as the air within the valley becomes decoupled from generally stronger winds aloft. Concentrations climb at a typical rate of about 10μgm-3d-1over a four-day period to about 60μgm-3during these episodes. During episodes when PM2.5 concentrations exceed 35μgm-3, the atmospheric column in the valley is characterized by: temperature below 0°C; relative humidity in excess of 50%; and light wind speeds. PM2.5 concentrations in excess of 35μgm-3are four times more likely when the valley is snow covered than when it is not. A stepwise multiple linear regression based upon selected meteorological variables is used to estimate daily values of PM2.5 during two independent winters. The correlation between observed and estimated PM2.5 for these winters reaches 0.81. © 2014 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81063
Appears in Collections:气候变化事实与影响

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作者单位: University of Utah, 135 S 1460 E, Salt Lake City, UT 84112-0110, United States; Department of Environmental Earth Systems, Stanford University, 473 Via Ortega, Stanford, CA 94305-4216, United States

Recommended Citation:
Whiteman C,D,, Hoch S,et al. Relationship between particulate air pollution and meteorological variables in Utah's Salt Lake Valley[J]. Atmospheric Environment,2014-01-01,94
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