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文章摘要

北京市交通环境监测点大气污染特征分析

Characteristics of Air Pollution at Traffic Environmental Monitoring Stations in Beijing

DOI：

英文关键词: NOx PM25 Pollution characteristic Traffic environment Air quality Beijing

基金项目:国家重点研发计划基金资助项目(2016YFC0209205，2016YFC0209207, 2016YFC0207904)；〖JP3〗国家自然科学基金资助项目(41401222)；〖JP〗总理基金资助项目（DQGG0107-01）

作者	单位
程念亮	中国环境科学研究院；北京市环境保护监测中心
李珊珊	北京市环境保护科学研究院，国家城市环境污染控制工程技术研究中心
王欣	中国环境科学研究院
陈晨	中国环境科学研究院

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中文摘要:

研究分析了2013—2017年北京市交通环境点位大气污染物浓度分布特征，结果发现：交通监测点NO、NO2与PM25浓度时间变化特征与城区总体状况基本一致，与交通环境密切相关的NO2浓度采暖季高于非采暖季，重污染日期间交通监测点峰值浓度也明显偏高；周末交通监测点NO浓度在5：00—23：00低于工作日49%～321%，周末NO2浓度在7：00—23：00低于工作日07%～74%，NOx浓度周末偏低与车流量降低密切相关；重大活动期间空气质量减排措施实施后，北京市作为区域NO2浓度高值区中心明显消失，PM25浓度分布梯度减小，本地减排效果明显。

英文摘要:

This article analyzed the characteristics of air pollutant concentrations in traffic environment sites in Beijing from 2013 to 2017. Results showed that the temporal variation of NO， NO2 and PM2.5 concentration at the monitoring sites were basically the same. The concentration of NO2 which was closely related to traffic environment was higher in heating season than that in non heating season and the peak value was significantly high at the traffic environment sites during heavy pollution period. From 5：00 to 23：00 on weekends， NO concentrations were 4.9%～32.1% lower than those on weekdays. From 7：00 to 23：00 on weekends， NO2 concentrations were 0.7%～7.4% lower than those on weekdays. This was due to the low traffic flow on weekends. During some important events such as APEC and Parade， Beijing was no longer as the high NO2 center， and PM2.5 concentration gradient decreased due to emission reduction.

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