2018~2020年北京市交通监测站点大气污染特征分析

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Abstract To explore the impacts on both air pollution and to monitor traffic pollution in Beijing, 18 air quality monitoring stations were selected from the 34 existing stations, including 5 traffic stations, 11 urban stations evaluated and 2 background stations (Miyun and Dingling). We compared the concentrations with the 5 major pollutants, NO₂, CO, O₃, PM_2.5 and PM₁₀, at the selected stations during 2018~2020, we found that these five pollutants decreased during these three years, and the decreases were generally 3%~50% higher in the traffic stations evaluated than in the urban stations evaluated. The decreases of NO₂, CO, O₃, and PM_2.5 were more important at the traffic stations evaluated than at the urban stations evaluated. The seasonal variation at each monitoring station was also different. O₃ was higher in summer and lower in winter, and the highest value in June 2018. The comparison to the concentrations of the other four pollutants NO₂, CO, PM_2.5 and PM₁₀ were also higher in winter and lower in summer. In March 2018, the concentration of pollutants was extremely higher due to dust and adverse meteorological conditions. To investigate the influence of COVID-19, the concentrations for these five pollutants were compared in 2019 and 2020. The results showed that NO₂ decreased most in comparison to the same period in 2019. At traffic stations evaluated, the average decreases among NO₂, CO and PM_2.5 were 4.81%, 10.21% and 4.38% respectively higher than those at the urban stations evaluated.

Key words： traffic pollution NO₂ weekend effect COVID-19

Received: 01 May 2021

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	CHU Fang-jie
	SUN Shuang
	LI Ling-jun
	ZHAO Wen-ji

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CHU Fang-jie,SUN Shuang,LI Ling-jun等. Characteristics of the atmospheric pollutants at traffic monitoring sites in Beijing during 2018~2020[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(12): 5548-5560.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I12/5548

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