2013~2014年北京市NO<sub>2</sub>时空分布研究

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Abstract

The Spatial and temporal distribution characteristics of NO₂ during 2013~2014 were analyzed based on the NO₂ monitoring data released by Beijing Municipal Environmental Monitoring Center. The analytical results showed that the annual average concentration of NO₂ in Beijing was 56.7μg/m³ in 2014 and increased 1.3% compared to that of NO₂ (56μg/m³) in 2013. The monthly average concentration of NO₂ changed in a wave-shape curve and the diurnal variation of NO₂ showed bimodal distribution. The annual average concentration of NO₂ was lower in the northern and western regions while higher in the six city area and southern area; NO₂ and PM_2.5, CO, NO showed a positive correlation while NO₂ and OX, O₃ had no significant correlation relationship. Calculated photolysis rate of NO₂ in the whole year and heavy pollution days was 0.105/min, 0.026/min, respectively. The values of NOR was 0.142±0.061, 0.190±0.036 in the whole year and heavy pollution days, respectively. High concentration of NO₂ was conducive to the formation of O₃ and also played a promoting role of heavy air pollution formation. Correlation coefficient between vehicle number and the annuanl concentration of NO₂ during 2000~2014 in Beijing was -0.84 and the NO_x emissions of vehicle had a significant effect on the change of the annual concentration of NO₂ in the area of Beijing city.

Key words： NO₂ spatial and temporal distribution Beijing NOR PM_2.5 photolysis rate

Received: 09 June 2015

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X513

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	Articles by authors
	CHENG Nian-liang
	LI Yun-ting
	CHEN Tian
	ZHANG Da-wei
	DONG Xin
	WANG Xin
	HUAN Ning
	LIU Bao-xian
	YAN He
	MENG Fan

Cite this article:

CHENG Nian-liang,LI Yun-ting,CHEN Tian等. Spatial and temporal distribution of NO₂ during 2013~2014 in Beijing[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(1): 18-26.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2016/V36/I1/18

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