Elucidating key factors in regulating budgets of ozone and its precursors in atmospheric boundary layer
The vertical variations and key drivers of ozone and its precursors, namely NOx and VOCs, in the atmospheric boundary layer, have vital impacts on surface ozone budgets but are poorly understood so far. Using online gradient measurements from a 356 m tower, we obtained continuous vertical profiles of ozone and its precursors, which exhibited strong gradients throughout the day. In the daytime, the vertical gradients of ozone precursors are significantly regulated by reactions with OH radicals. At night, our observations confirmed more intense VOC reactions with NO3 radicals in the residual layer than in the boundary layer. Additionally, we found that residual layer entrainment could contribute to over half of the boundary-layer ozone enhancements in the morning periods. Our results underscore the importance of considering vertical changes of ozone and its precursors in the atmospheric boundary layer when developing future ozone mitigation strategies.
Authors
- Sihang Wang (ORCID: https://orcid.org/0000-0001-9393-3763)
- Yubin Chen (ORCID: https://orcid.org/0000-0002-9912-7655)
- Aiming Liu (ORCID: https://orcid.org/0000-0002-5937-6278)
- Bin Fang Yuan (ORCID: https://orcid.org/0000-0003-3041-0329)
- Yibo Huangfu (ORCID: https://orcid.org/0000-0002-4243-1701)
- Yuwen Peng (ORCID: https://orcid.org/0009-0001-3932-0111)
- Chanfang Liu
- Xiaobing Li (ORCID: https://orcid.org/0000-0003-2549-3211)
- Honglong Yang (ORCID: https://orcid.org/0000-0002-8141-7451)
- Min Shao (ORCID: https://orcid.org/0009-0001-5128-8580)
- Chunsheng Zhang (ORCID: https://orcid.org/0000-0002-8542-8676)
- Xin Song (ORCID: https://orcid.org/0000-0001-5537-9087)
- Xianjun He (ORCID: https://orcid.org/0009-0000-1254-6770)
- Jin Li (ORCID: https://orcid.org/0000-0002-3270-0787)
Institutions
- Jinan University (CN)
- Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality (CN)
- Meteorological Bureau of Shenzhen Municipality (CN)
- Guangdong Province Environmental Monitoring Center (CN)
Publication Details
- Journal
- npj Climate and Atmospheric Science
- Published
- 2024-10-28
- DOI
- https://doi.org/10.1038/s41612-024-00818-8
- Citations
- 17
- Primary Topic
- Atmospheric chemistry and aerosols
- Type
- article
- Field-Weighted Citation Impact
- 6.40
Funders
- National Natural Science Foundation of China
- Basic and Applied Basic Research Foundation of Guangdong Province