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Effect of short-term regional traffic restriction on urban submicron particulate pollution

查看全文 作　　者：Suping [1]Zhao;Ye [1]Yu 高影响力作者 机构地区：[1]Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China高影响力机构 出　　处：《Journal of Environmental Sciences》索引2017年第29卷第5期,共14页高影响力期刊 基　　金：financially supported by the Foundation for Excellent Youth Scholars of CAREERI,CAS(No.51Y451311);the Hundred Talents Program of Chinese Academy of Sciences to Ye YU(No.29O827631);Natural Science Foundation of China(No.41504056) 摘　　要：During the 2013 and 2015 Lanzhou International Marathon Events(LIME1 and LIME2),the local government made a significant effort to improve traffic conditions and air quality by implementing traffic restriction measures. To fill the gap in information on the effect of short-period(several hours)traffic control on urban air quality,submicron particle size distributions and meteorological data were measured simultaneously during June 2013 and June 2015 in urban Lanzhou. The number and surface area concentrations of particles in the100–200 nm range declined by 67.2% and 65.0% for LIME1 due to traffic control,while they decreased by 39.2% and 37.1% for LIME2. The impact of traffic restriction on air pollution near the sampling site lagged behind the traffic control period for LIME2. In addition,the effect of traffic restriction on air pollution near the sampling site was dependent on the distance between the relative orientation of the sampling site and traffic-restricted zones,as well as meteorological conditions such as wind direction. The influence of traffic restrictions on the particle concentrations differed for different particle sizes. The size range most affected by traffic restriction was 60–200 and 60–300 nm for number and surface area concentrations in the urban environment,respectively,while for the particle volume concentration it was the 100–600 nm range. This study will provide a basis for implementation of future urban traffic-induced particulate pollution control measures. 关 键 词：城市空气质量 交通限制 颗粒物污染 亚微米 颗粒尺寸分布 颗粒表面积 短期 交通管制
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