DOI: 10.1016/j.atmosenv.2016.10.039
Scopus记录号: 2-s2.0-84995747123
论文题名: On-road measurements of vehicle NO2/NOx emission ratios in Denver, Colorado, USA
作者: Wild R ; J ; , Dubé W ; P ; , Aikin K ; C ; , Eilerman S ; J ; , Neuman J ; A ; , Peischl J ; , Ryerson T ; B ; , Brown S ; S
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 148 起始页码: 182
结束页码: 189
语种: 英语
英文关键词: Direct NO2 emissions
; NOx emissions
Scopus关键词: Chemical laboratories
; Engines
; Fleet operations
; Ozone
; Roads and streets
; Transportation
; Vehicles
; Combustion engines
; Denver , Colorado
; Emissions inventory
; Heavy-duty diesel
; Mobile laboratories
; Nitrogen dioxides
; On-road vehicle emissions
; Tropospheric ozone
; Nitrogen oxides
; gasoline
; nitrogen dioxide
; nitrogen oxide
; ozone
; algorithm
; atmospheric plume
; atmospheric pollution
; combustion
; data set
; instrumentation
; nitrogen oxides
; ozone
; pollution monitoring
; road traffic
; traffic emission
; troposphere
; algorithm
; Article
; boundary layer
; chemoluminescence
; combustion
; highway
; human
; plume dispersion
; priority journal
; remote sensing
; self examination
; travel
; United States
; Colorado
; Denver
; Europe
; Greeley
; 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: Nitrogen oxides (NOx = NO + NO2) emitted by on-road combustion engines are important contributors to tropospheric ozone production. The NOx fraction emitted as nitrogen dioxide (NO2) is usually presumed to be small but can affect ozone production and distribution, and this fraction is generally not reported in emissions inventories. We have developed an accurate method for determination of this primary NO2 emission and demonstrated it during measurement of on-road vehicle emission plumes from a mobile laboratory during July and August 2014 in the region between Denver and Greeley in Colorado. During a total of approximately 90 h of sampling from an instrumented mobile laboratory, we identified 1867 vehicle emission plumes, which were extracted using an algorithm that looks for rapid and large increases in measured NOx. We find a distribution of NO2/NOx emissions similar to a log-normal profile, with an average emission ratio of 0.053 ± 0.002 per sampled NOx plume. The average is not weighted by the total NOx emissions from sampled vehicles, which is not measured here, and so may not represent the NO2/NOx ratio of the total NOx emission if this ratio is a function of NOx itself. Although our current data set does not distinguish between different engine types (e.g., gasoline, light duty diesel and heavy duty diesel), the ratio is on the low end of recent reports of vehicle fleet NO2 to NOx emission ratios in Europe. © 2016
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82463
Appears in Collections: 气候变化事实与影响
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作者单位: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States; Chemical Sciences Division, Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, United States; Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, United States
Recommended Citation:
Wild R,J,, Dubé W,et al. On-road measurements of vehicle NO2/NOx emission ratios in Denver, Colorado, USA[J]. Atmospheric Environment,2017-01-01,148