深圳市秋季大气臭氧立体分布特征

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Abstract

Simultaneous O₃ observation was carried out in both the eastern natural ecological zone and the western urban living area in Shenzhen from the autumn with high photochemical activity to the winter with low photochemical activity in 2018, and then the evolution process of O₃ was explored and discussed. The results showed that during October, the O₃ concentration observed in the eastern site was 128% higher than that in the western site near the ground. From the ground to an elevation of 450m, the O₃ concentration in the east decreased. Conversely, due to the titration effect occurring in the west, the concentration of O₃ increased in proportion to the elevation up to 450m. From 450m to 2km, the O₃ concentration decreased at both sites, with the O₃concentration in the western area being about 30% higher than that in the eastern area. The O₃ concentration above 2km was generally stable and can be regarded as the background concentration (~70µg/m³), providing a high regional background concentration for the autumn O₃ pollution in Shenzhen. Analysis of high pollution process showed that the O₃ pollution variation was consistent within the atmospheric boundary layer in Shenzhen, indicating that O₃ pollution was significantly affected by regional transport. The transport of O₃ at the high altitudes in the western area was more prominent. From autumn to winter, the O₃ concentration decreased continuously due to the weakened photochemical reactions, and the horizontal and vertical variation of O₃ concentration also decreased in Shenzhen. The O₃ pollution level was essentially controlled by the regional background inwinter in Shenzhen.

Key words： O₃ pollution vertical distribution concentration profile lidar photochemical reaction

Received: 25 October 2019

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X513

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	Articles by authors
	LI Yan-ting
	SUN Tian-le
	HE Long
	CHEN Yao
	ZENG Li-wu
	HUANG Xiao-feng
	HE Ling-yan

Cite this article:

LI Yan-ting,SUN Tian-le,HE Long等. Vertical distribution characteristics of ozone pollution in Shenzhen in autumn[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(5): 1975-1981.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I5/1975

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