气候变化领域集成服务门户(CCPortal): Long-term trend of ozone in southern China reveals future mitigation strategy for air pollution

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DOI	10.1016/j.atmosenv.2021.118869
	Long-term trend of ozone in southern China reveals future mitigation strategy for air pollution
	Li X.-B.; Yuan B.; Parrish D.D.; Chen D.; Song Y.; Yang S.; Liu Z.; Shao M.
发表日期	2022
ISSN	1352-2310
卷号	269
英文摘要	The 14-year trends of surface ozone were examined using observations from 12 urban sites and 4 regional sites over the Pearl River Delta (PRD) region in China over the 2006–2019 period. Surface ozone exhibits upward trends in the range of 0.28–1.02 ppb yr−1 at urban sites and mixed trends in the range of −0.29 – 0.21 ppb yr−1 at regional sites. Meanwhile, surface Ox (Ox = O3+NO2) mixing ratios exhibit downward trends at 9 urban sites and 3 regional sites in the range of −0.01 to −0.54 ppb yr−1, revealing that the ozone rise at urban sites is predominantly attributed to the reduced titration effect by nitric oxide (NO). The further decline of surface NO2 mixing ratios could drive the decreases in Ox mixing ratios and the increases in ozone mixing ratios at urban sites. In addition, surface Ox concentrations show a good correlation with aerosol concentrations, implying the dominant contributions of secondary production to aerosol and the consistent control strategies of ozone and aerosol pollution in PRD. For the abatement of ozone pollution, our results highlight the synergistic control of key precursors including nitrogen oxides and volatile organic compounds to counteract the reduced NO titration effect by inhibiting the photochemical production of ozone. At last, we also highlight the importance of establishing more regional sites in comprehensively assessing spatiotemporal changes in surface air pollutants in China. © 2021 Elsevier Ltd
关键词	NO titration Pearl river delta Pollution control Surface ozone trend
语种	英语
scopus关键词	Aerosols; Air pollution; Air pollution control; Mixing; Nitrogen oxides; Ozone; River pollution; Titration; Urban growth; Volatile organic compounds; Long-term trend; Mitigation strategy; Mixing ratios; Nitric oxide titration; Pearl River delta; Pearl River Delta region; Southern China; Surface ozone; Surface ozone trends; Urban site; Nitric oxide
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248106
作者单位	Institute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, China; Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Guangzhou, 511443, China; Guangdong Environmental Monitoring Center, Guangzhou, 510308, China
推荐引用方式 GB/T 7714	Li X.-B.,Yuan B.,Parrish D.D.,et al. Long-term trend of ozone in southern China reveals future mitigation strategy for air pollution[J],2022,269.
APA	Li X.-B..,Yuan B..,Parrish D.D..,Chen D..,Song Y..,...&Shao M..(2022).Long-term trend of ozone in southern China reveals future mitigation strategy for air pollution.ATMOSPHERIC ENVIRONMENT,269.
MLA	Li X.-B.,et al."Long-term trend of ozone in southern China reveals future mitigation strategy for air pollution".ATMOSPHERIC ENVIRONMENT 269(2022).