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首页> 外文期刊>Environmental Science & Technology >Fine (PM_(2.5) and Coarse (PM_(2.5-10)) Paniculate Matter on A Heavily Trafficked London Highway:Sources and Processes
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Fine (PM_(2.5) and Coarse (PM_(2.5-10)) Paniculate Matter on A Heavily Trafficked London Highway:Sources and Processes

机译：伦敦交通繁忙的高速公路上的精细（PM_（2.5）和粗略（PM_（2.5-10））颗粒物质：来源和过程

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摘要

A large dataset for PM_(2.5) and PM_(coarse) (PM_(2.5-10) concentrations monitored near a busy London highway (Marylebone Road) has been analyzed to define the factors that lead to high concentrations.The following have been highlighted as major influencing parameters:wind speed,prevailing wind direction (because of its role on the microscale dispersion within the street),the daily cycle of the atmospheric boundary layer (stable during the night/ convective and mixed during the day),and traffic density.The mainly diesel heavy-duty vehicles are the main source of fine paniculate matter at Marylebone Road.In particular,lorries (trucks) dominate PM_(10) exhaust emissions which are mainly in the fine (<2.5 mum) size range.A strong correlation with PM_(coarse) suggests that the heavy-duty traffic is largely responsible for this component also.Substantial local increments in PM_(2.5) and PM_(coarse) due to traffic have been estimated and a large part of the increment in PM_(coarse) concentrations is inferred to arise from resuspended road dust emissions since the contribution of abrasion processes estimated from emission factors is modest.Despite the strong influence of traffic on PM concentrations measured at Marylebone Road the analysis of factors leading to the highest 5% of hourly concentrations of PMio at Marylebone Road reveals that almost half of these events were due to building works.The other events occurred when all or most of the key factors occurred simultaneously (heavy traffic,poor dispersion,etc.).Some episodes of high PM_(2.5) concentrations were associated with long-range transport in which the regional PM_(2.5) constituted most of the local concentrations.
机译：已分析了一个繁忙的伦敦高速公路（马里里伯尼路）附近监测到的PM_（2.5）和PM_（粗）（PM_（2.5-10））浓度的大型数据集，以确定导致高浓度的因素。主要影响参数：风速，普遍的风向（由于其在街道内的微小尺度分散中的作用），大气边界层的日循环（夜间稳定/对流和白天混合）以及交通密度。马里波恩路主要的柴油重型车辆是细颗粒物的主要来源，尤其是货车（卡车）在PM_（10）废气排放中占主导地位，主要在细颗粒物（<2.5 um）范围内。 PM_（coarse）表示繁忙的交通也是该部分的主要原因。据估计，由于交通造成的PM_（2.5）和PM_（coarse）局部大幅增加，而PM_（coarse）的增量很大一部分）集中由于交通因素对马里波恩路PM浓度的强烈影响，分析了导致道路每小时粉尘浓度最高5％的因素的分析，这归因于重悬的道路粉尘排放，因为根据排放因子估算的磨耗过程的贡献很小。马里波恩路（Marylebone Road）的PMio揭示，这些事件中几乎有一半是由于建筑工程引起的;其他事件则是在所有或大多数关键因素同时发生（交通繁忙，分散差等）时发生的。有些事件中PM_（2.5）高浓度与远距离迁移有关，其中区域PM_（2.5）构成了大部分局部浓度。

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  • 来源
    《Environmental Science & Technology》 |2005年第20期|p.7768-7776|共9页
  • 作者

    AURELIE CHARRON; ROY M.HARRISON;

  • 作者单位

    Division Of Environmental Health and Risk Management,School Of Geography,Earth and Environmental Sciences,The University Of Birmingham,Edgbaston,Birmingham B15 2TT,United Kingdom;

    Division Of Environmental Health and Risk Management,School Of Geography,Earth and Environmental Sciences,The University Of Birmingham,Edgbaston,Birmingham B15 2TT,United Kingdom;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
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