广东省夏秋季光化学反应活性空间分布表征

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Abstract OH radicals were observed at urban and rural sites in the late summer and early autumn in Shenzhen, China. The daytime peak average concentrations of OH radicals were 6.0×10⁶cm^-3 and 5.9×10⁶cm^-3, which were at a moderate level compared to other regions around the world. Based on the observed data, a parameterized formula of OH radicals, with good fitting, was constructed to characterize the spatial distribution of OH radicals in Guangdong Province. The activity of photochemistry (AP) was reflected by the product of daytime OH and NO₂ concentrations. Generally, higher AP (10.1×10⁷μg/(m³·cm³)) was found in the Pearl River Delta (PRD) and the lower AP in eastern, western and northern Guangdong (5.4×10⁷,5.9×10⁷ and 7.7×10⁷μg/(m³·cm³)). Higher concentrations of PM_2.5 and O₃ were also found in the PRD, indicating a key role of regulating AP in the coordinated control of PM_2.5 and O₃ pollution in the PRD. The spatial distribution characteristics also showed that northern Guangdong and eastern Guangdong were significantly affected by the regional transport of PM_2.5 from the northern inland and the regional transport of O₃ from the southeast coast, respectively, reflecting the importance of regional joint control to jointly mitigate PM_2.5 and O₃ pollution.

Key words： activity of photochemistry OH radical precursor ozone (O₃) fine particulate matter (PM_2.5)

Received: 09 June 2022

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X513

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	Articles by authors
	TANG Meng-xue
	HUANG Xiao-feng
	CHENG yong
	LIN Xiao-yu
	YAO Pei-ting
	HU Ren-zhi
	DENG Tao
	HE Ling-yan

Cite this article:

TANG Meng-xue,HUANG Xiao-feng,CHENG yong等. Study on characterizing the spatial distribution of activity of photochemistry in summer and autumn in Guangdong Province, China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(1): 1-6.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I1/1

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