基于无人机观测研究杭州湾化工园区近地面层臭氧垂直廓线

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Abstract In order to understand the air pollution in chemical parks, the vertical profiles of ozone (O₃) in chemical park were studied bya self-developed miniature atmospheric detector combined withan unmanned aerial vehicle(UAV), a 12-day UAV field observations was carried out in Shangyu Economic Development Zone of Hangzhou Bay during August 2020 to January 2021. Flight observations were conducted every 1h from 08:00 to 18:00 on each observation day, the concentrations of O₃, TVOCs and NO₂ were obtained at 0, 50, 100, 200, 300, 400 and 500m above the ground for each observation. The results showed that the concentrations of TVOCs and NO₂ usually decreased with increasing height due to meteorological factors, ground-level plant emissions and peak travel, and the concentrations of NO₂ decreased more significantly with increasing height, ranged from 19.7~59.1μg/m³ at 0m to 5.9~21.7μg/m³ at 500m, with a decreased rate of 40%~70%.The concentrations of TVOCs and NO₂ showed a daily trend of high in the morning and evening, low in the noon. In addition, the concentrations of NO₂ increased at 400~500m in some days caused by inversion layer. The concentrations of O₃ increased with height affected by the photochemical reaction of precursors, solar radiation intensity and stratospheric input, the average concentrations were 49.2μg/m³ at 0m and 98.4μg/m³ at 500m, and the peak value of daily variations reached at 15:00~17:00. TVOCs and O₃, NO₂ and O₃ were negatively correlated at all heights. The seasonal change of O₃ concentrations were summer>autumn>winter, and the concentrations of TVOCs and NO₂ were winter>autumn>summer, affected by the difference of meteorological factors in different seasons and the increase of heating emissions in winter. Backward trajectory cluster analysis showed that the local O₃ concentrations in chemical industry park would be affected by regional transport, and the local O₃ concentrations in winter was less influenced by the regional transport than in summer because the low temperature was not conducive to the generation of O₃ from precursors.

Key words： ozone unmanned aerial vehicle vertical profile chemical industrial park backward trajectory

Received: 17 November 2021

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X515

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	Articles by authors
	DAI Shang
	ZHOU Cheng-xiang
	PANG Xiao-bing
	LI Jing-jing
	CHEN Lang
	WU Zhen-tao
	YUAN Kai-bin
	HAN Zhang-liang
	WANG Qiang
	WANG Shuai-qi
	CHEN Jian-meng

Cite this article:

DAI Shang,ZHOU Cheng-xiang,PANG Xiao-bing等. Vertical profiles characteristics of near surface layer ozone in Shangyu Economic Development Zone of Hangzhou Bay based on unmanned aerial vehicle[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(6): 2514-2522.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I6/2514

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