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Diurnal emission variation of ozone precursors: Impacts on ozone formation during Sep. 2019.
Tang, Yifan; Wang, Yuchen; Chen, Xuwu; Liang, Jie; Li, Shuai; Chen, Gaojie; Chen, Zuo; Tang, Binxu; Zhu, Jiesong; Li, Xiaodong.
Afiliación
  • Tang Y; College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China.
  • Wang Y; College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China.
  • Chen X; School of Advanced Interdisciplinary Studies, Hunan University of Technology and Business, Changsha 410205, PR China.
  • Liang J; College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China.
  • Li S; College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China.
  • Chen G; College of Mathematics and Econometrics, Hunan University, Changsha 410082, PR China.
  • Chen Z; College of Information Science and Technology, Hunan University, Changsha 410082, PR China.
  • Tang B; College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China.
  • Zhu J; College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China.
  • Li X; College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China. Electronic address: lxdfox@hnu.edu.cn.
Sci Total Environ ; 929: 172591, 2024 Jun 15.
Article en En | MEDLINE | ID: mdl-38663597
ABSTRACT
With the issue of ozone (O3) pollution having increasingly gained visibility and prominence in China, the Chinese government explored various policies to mitigate O3 pollution. In some provinces and cities, diurnal regulations of O3 precursor were implemented, such as shifting O3 precursor emission processes to nighttime and offering preferential refueling at night. However, the effectiveness of these policies remains unverified, and their impact on the O3 generation process requires further elucidation. In this study, we utilized a regional climate and air quality model (WRF-Chem, v4.5) to test three scenarios aimed at exploring the impact of diurnal industry emission variation of O3 precursors on O3 formation. Significant O3 variations were observed mainly in urban areas. Shifting volatile organic compounds (VOCs) to nighttime have slight decreased daytime O3 levels while moving nitrogen oxides (NOx) to nighttime elevates O3 levels. Simultaneously moving both to nighttime showed combined effects. Process analysis indicates that the diurnal variation in O3 was mainly attributed to chemical process and vertical mixing in urban areas, while advection becomes more important in non-urban areas, contributing to the changes in O3 and O3 precursors levels through regional transportation. Further photochemical analysis reveals that the O3 photochemical production in urban areas was affected by reduced daytime O3 precursors emissions. Specifically, decreasing VOCs lowered the daytime O3 production by reducing the ROx radicals (ROx = HO + HO˙2 + RO˙2), whereas decreasing NOx promoted the daytime O3 production by weakening ROx radical loss. Our results demonstrate that diurnal regulation of O3 precursors will disrupt the ROx radical and O3 formation in local areas, resulting in a change in O3 concentration and atmospheric oxidation capacity, which should be considered in formulating new relevant policies.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article Pais de publicación: Países Bajos