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Published December 24, 2024 | Version Supplemental Material
Journal Article Open

Increasing Contribution of Chlorine Chemistry to Wintertime Ozone Formation Promoted by Enhanced Nitrogen Chemistry

Creators

  • 1. ROR icon Institute of Urban Environment
  • 2. ROR icon University of Chinese Academy of Sciences
  • 3. ROR icon Zhejiang Gongshang University
  • 4. ROR icon Zhejiang University
  • 5. ROR icon Shandong University
  • 6. ROR icon Sun Yat-sen University
  • 7. ROR icon California Institute of Technology

Abstract

Chlorine (Cl) radicals strongly affect atmospheric oxidation and the fate of pollutants. Despite several observations, the potential impacts of nitrogen chemistry associated with NO2 on Cl chemistry are poorly understood. Here, we provided direct field evidence that the nitrogen chemistry enhancements triggered by the increased NO2 drove daytime nitrate (NO3-) photolysis and nighttime NO3-N2O5 reactions, significantly promoting the increases in the concentrations of ClNO2 and Cl2 after the Chinese Spring Festival. The enhancement in the Cl chemistry facilitated the elevations of both O3 and atmospheric oxidation capacity during the winter daytime. Our findings highlighted the importance of nitrogen chemistry induced by the increased NO2 in enhanced Cl chemistry.

Copyright and License

© 2024, American Chemical Society

Acknowledgement

This work was funded by the National Natural Science Foundation of China (U22A20578, 42277091, 72361137007, 42175084, and 21577126), the Science and Technology Department of Fujian Province (2022L3025), the National Key Research and Development Program (2022YFC3700304), STS Plan Supporting Project of the Chinese Academy of Sciences in Fujian Province (2023T3013), Guangdong Basic and Applied Basic Research Foundation (2022A1515010852), and the Fundamental Research Funds for the Central Universities, Sun Yat-sen University (23hytd002), and Xiamen Atmospheric Environment Observation and Research Station of Fujian Province.

Supplemental Material

The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.est.4c09523.

  • Detailed information on the study site, observational instruments, calibration results, box model setting and output parameters, and differences of observed parameters and simulation results between the periods after and during the Spring Festival (PDF)

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Additional details

Funding

National Natural Science Foundation of China
U22A20578
National Natural Science Foundation of China
42277091
National Natural Science Foundation of China
72361137007
National Natural Science Foundation of China
42175084
National Natural Science Foundation of China
21577126
Sun Yat-sen University
23hytd002
Fujian Provincial Department of Science and Technology
2022L3025
Ministry of Science and Technology of the People's Republic of China
2022YFC3700304
Guangdong Science and Technology Department
2022A1515010852
Xiamen Atmospheric Environment Observation and Research Station of Fujian Province
STS Plan Supporting Project of the Chinese Academy of Sciences in Fujian Province
2023T3013

Dates

Accepted
2024-11-14
Accepted
Available
2024-11-25
Published online

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Publication Status
Published