DOI: 10.1016/j.atmosenv.2014.05.025
Scopus记录号: 2-s2.0-84901360407
论文题名: Seasonal variability of ultra-fine metals downwind of a heavily traveled secondary road
作者: Cahill T ; A ; , Barnes D ; E ; , Spada N ; J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 94 起始页码: 173
结束页码: 179
语种: 英语
英文关键词: Roadway emissions
; Seasonal variability
; Ultra-fine metallic aerosols
; Vehicle brakes
Scopus关键词: Aerosols
; Brakes
; Epidemiological studies
; Inversion conditions
; Roadway emissions
; Seasonal variability
; Strong inversion
; Ultra-fine aerosols
; Vehicle brakes
; Winter conditions
; Roads and streets
; lubricating agent
; metal
; zinc
; aerosol composition
; anthropogenic source
; atmospheric pollution
; concentration (composition)
; dust
; epidemiology
; health impact
; road
; seasonal variation
; traffic emission
; urban atmosphere
; aerosol
; air pollutant
; air pollution
; article
; chemical composition
; concentration (parameters)
; particle size
; priority journal
; seasonal variation
; spring
; summer
; urban area
; winter
; California
; Central Valley [California]
; Sacramento
; United States
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: Since 2002, we have been studying the impact of a heavily traveled secondary road on an adjacent downwind school located at a stop light controlled intersection. The prior studies were all performed in winter conditions with typically strong inversions, but established significant PM2.5 impacts on the school roughly in accord with theoretical models and the relevant literature. In this project, we have enhanced this effort by extending the study from winter to summer, and adding compositionally-resolved ultra-fine aerosol measurements. Ultra-fine aerosols, including metals derived from both brake wear and zinc in lubricating oil, were present at high concentrations in winter downwind of the roadway but absent at a residential site 500m upwind. Their concentrations faded to minor levels in spring and early summer, while coarse roadway resuspended dust increased in that period. A comparison of ultra-fine measurements in downtown Sacramento and other California Central Valley sites indicates that these traffic derived aerosols are widely present in urban areas impacted by heavy traffic, freeways and secondary streets, especially where heavy braking is occurring. The potential for health impacts of ultra-fine metals associated with cars braking and accelerating in inversion conditions is a serious health concern based on recent epidemiological studies. © 2014 The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81233
Appears in Collections: 气候变化事实与影响
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作者单位: The DELTA Group, University of California, Davis, CA, United States; The Health Effects Task Force, Breathe California of Sacramento Emigrant Trails, Sacramento, CA, United States
Recommended Citation:
Cahill T,A,, Barnes D,et al. Seasonal variability of ultra-fine metals downwind of a heavily traveled secondary road[J]. Atmospheric Environment,2014-01-01,94