京津冀地区2015~2020年臭氧持续污染事件特征、气象影响及潜在源区分析

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Abstract Based on hourly observed ozone concentration and meteorological reanalysis data from 2015 to 2020, this study analyzed the persistent ozone pollution events, their relationship to the meteorological factors and the potential sources in Beijing-Tianjin-Hebei (BTH) region via the generalized additive model, potential source contribution function and concentration weight trajectory methods. The results show that the number of ozone pollution events lasting three or more consecutive days (OPE3) in BTH increased from 24 days in 2015 to 76days in 2020, accounting for 85% of the total ozone pollution days. The monthly variation in OPE3days were highly consistent with the ozone concentration, with a correlation coefficient of 0.97 from May to September. For example, OPE3 in Beijing mainly occurred under a weather pattern characterized by abnormal anticyclonic, high temperature, low relative humidity, anomalous southerlies and downward air flow. During OPE3, the air mass came mainly from the south of Beijing through a short-distance transport (71.2%). The primary potential sources included the southern Hebei Province, northeastern Shanxi Province, northeastern Henan Province, and northern Shandong Province, together contributing about 79.3% to the OPE3in Beijing.

Key words： Beijing-Tianjin-Hebei (BTH) persistent ozone pollution events meteorological parameters potential source contribution function concentration weight trajectory

Received: 27 September 2022

PACS:	X515
	X16

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	ZHANG Ying
	XU Jian-min
	WANG Yao
	SU Bao-shan
	WU Yan-xing
	HU Ting-ting
	LIU Run

Cite this article:

ZHANG Ying,XU Jian-min,WANG Yao等. Characteristics, meteorological impacts and potential sources of persistent ozone pollution events in Beijing-Tianjin-Hebei Region during 2015~2020[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(6): 2714-2721.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I6/2714

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