区域输送对天津臭氧污染的影响

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Abstract The atmospheric chemistry model was used to quantitatively estimate the impact of regional transport on the ozone (O₃) concentration in Beijing-Tianjin-Hebei region during April to September of 2019, and Tianjin was the focus of analysis. Additionally, the relationship between the weather pattern and meteorological conditions with O₃ regional transport was also analyzed. The results showed that O₃ pollution of 13 cities in the Beijing-Tianjin-Hebei region was mainly attributed to regional transport, with distinguished contribution in different cities. The local generation for O₃ pollution in Tianjin accounted for 24%. The O₃ regional transport from other cities in the Beijing-Tianjin-Hebei region and Shandong province totally accounted for48.3%. O₃ regional transport occurred frequently under the weather pattern of low pressure, front and rear of low pressure. The southern air flow passed Tianjin was an important factor generating high O₃ concentration, and it was the main pathway of O₃ regional transportation for Tianjin. With the rise of O₃ concentration, the contribution of O₃ regional transportation increased gradually, and the contribution of O₃ regional transportation was comparative to local generation in severe O₃ pollution. The analysis of a typical O₃ pollution event showed that the high temperature and strong radiation as well as favorable weather pattern promoted the local formation of O₃. The O₃ regional transport from southwest direction and weak downdraft jointly maintained this O₃ pollution event for 3 days.

Key words： ozone regional transport WRF-Chem weather analysis Tianjin

Received: 19 April 2022

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X511

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	Articles by authors
	FAN Wen-yan
	CAI Zi-ying
	YAO Qing
	WANG Xiao-jia
	TANG Ying-xiao
	HAN Su-qin

Cite this article:

FAN Wen-yan,CAI Zi-ying,YAO Qing等. Effect of regional transport on ozone pollution in Tianjin[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(11): 4991-4999.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I11/4991

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