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On-road emission factor distributions of individual diesel vehicles in and around Beijing, China
Wang, Xing1; Westerdahl, Dane1; Wu, Ye2; Pan, Xiaochuan3; Zhang, K. Max1
关键词Climate change Air quality Diesel Size distribution
刊名ATMOSPHERIC ENVIRONMENT
2011
DOI10.1016/j.atmosenv.2010.09.014
45期:2页:503-513
收录类别SCI
文章类型Article
WOS标题词Science & Technology
类目[WOS]Environmental Sciences ; Meteorology & Atmospheric Sciences
研究领域[WOS]Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
关键词[WOS]NUCLEATION MODE PARTICLES ; BLACK CARBON ; PARTICULATE MATTER ; REAL-TIME ; SIZE DISTRIBUTIONS ; AEROSOL-PARTICLES ; AETHALOMETER DATA ; MOTOR-VEHICLES ; AIR-POLLUTION ; EXHAUST
英文摘要

This paper reports findings of a recent field study that characterized the on-road emissions of individual diesel vehicles in and around Beijing, China during November and December of 2009. We successfully sampled 230 individual trucks on 4 major expressways around the city as well as 57 individual buses in the city using refined mobile chasing techniques and fast response instruments. Emission factors (EF) for carbon monoxide (CO), black carbon (BC) and particulate matter with diameters less than 0.5 mu m (PM0.5) are derived from the measurements, which are consistent with the results from laboratory dynamometer tests. The PM0.5 number emission factor distributions demonstrate consistent bimodal modes with peaks around 10 nm and 80 nm, while the mass emission factor distributions demonstrate a unimodal maximum around 110 nm for a majority of the trucks. The BC emissions are shown to be highly correlated with the mass emission of particles with 100-250 nm diameters, which are in good agreement with the results from previous studies. A number of important policy implications are discussed based on the results from this study. First, we identified "heavy emitters" in the on-road fleet we encountered, finding that 5% of diesel trucks in this sample are responsible for 50% of total BC emissions, and 20% of the trucks are responsible for 50% CO and PM0.5 number emissions, 60% PM0.5 mass emissions and over 70% of BC emissions. This suggests that emissions control programs should include identifying and removing heavy emitters from the road or improving their emissions. Second, the BC and PM0.5 number emission factors of trucks registered in regions outside Beijing are significantly higher than those of Beijing-registered trucks, suggesting that improving engine and fuel standards in Beijing alone is not sufficient in reducing the traffic-related air pollution in Beijing. Third, the significantly lower emissions from Euro IV and CNG buses compared to the Euro II and Euro III buses support that introducing clean-burning buses is an effective way to reduce the overall vehicle emissions for the pollutants studied. Fourth, our refined chasing method demonstrates a cost-effective approach to characterize the emissions from a large number of on-road diesel vehicles. Further studies with large sample sizes are critical to constructing more accurate mobile emission inventories to represent the on-road vehicle population. (C) 2010 Elsevier Ltd. All rights reserved.

语种英语
WOS记录号WOS:000286954800026
项目编号EP-C-06-003
资助机构US Environmental Protection Agency (USEPA)
引用统计
被引频次:61[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bjmu.edu.cn/handle/400002259/66410
专题北京大学公共卫生学院
北京大学公共卫生学院_公共卫生学院
作者单位1.Cornell Univ, Sibley Sch Mech & Aerosp Engn, Ithaca, NY 14853 USA
2.Tsinghua Univ, Dept Environm Sci & Engn, Beijing 100084, Peoples R China
3.Peking Univ, Sch Publ Hlth, Dept Occupat & Environm Hlth, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714
Wang, Xing,Westerdahl, Dane,Wu, Ye,et al. On-road emission factor distributions of individual diesel vehicles in and around Beijing, China[J]. ATMOSPHERIC ENVIRONMENT,2011,45(2):503-513.
APA Wang, Xing,Westerdahl, Dane,Wu, Ye,Pan, Xiaochuan,&Zhang, K. Max.(2011).On-road emission factor distributions of individual diesel vehicles in and around Beijing, China.ATMOSPHERIC ENVIRONMENT,45(2),503-513.
MLA Wang, Xing,et al."On-road emission factor distributions of individual diesel vehicles in and around Beijing, China".ATMOSPHERIC ENVIRONMENT 45.2(2011):503-513.
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