气象要素变化对城市空气质量影响的评估方法与应用——以PM<sub>2.5</sub>为例

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Abstract Based on the urban scale air quality model and the advection diffusion theory, this research classified the meteorological elements, then studied the correlation between the air quality and the emission source intensity corresponding to various meteorological conditions, and finally established an assessment method of the impact of meteorological element changes on urban air quality. The method considered the basic meteorological elements including wind (wind speed and direction), cloud cover, solar radiation intensity, atmospheric stability, mixing layer height and so on. The method can evaluate the improvement of air quality caused by long-term meteorological changes quantitatively and effectively. A case study was carried out for Hebi in which the PM_2.5 concentration decreased by 7.2μg/m³ in 2021 compared with that in 2020. The calculation result showed that the change of meteorological elements and emission reduction were decreased by 0.4μg/m³ and 6.8μg/m³ which accounted for 5.6% and 94.4%, respectively. The results indicated a leading role of the human efforts on the improvement of the air quality. At the same time, the calculation results showed that concentration of PM_2.5 decreased in all of summer, autumn and winter due to the effective prevention and control of air pollution. The most significant effect of human efforts was found in winter. The concentration of PM_2.5 decreased by 27.8μg/m³ in winter and the contribution of human efforts was 16.8μg/m³.

Key words： emission source intensity change of meteorological elements air quality evaluation method Hebi PM_2.5

Received: 31 May 2022

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X823

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	Articles by authors
	ZHAO Yu-xi
	REN Jia-hao
	CHEN Yi-zhen
	ZHANG Xin-min
	ZHANG Kai
	YANG Xin
	HE You-jiang

Cite this article:

ZHAO Yu-xi,REN Jia-hao,CHEN Yi-zhen等. Evaluation method and application in influences of meteorological element on urban air quality: taking PM_2.5 as an example[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(12): 5610-5616.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I12/5610

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