A Unique Mechanism of Ozone Surges Jointly Triggered by Deep Stratospheric Intrusions and the Tibetan Plateau Topographic Forcing
Abstract Given our poor understanding on mechanisms of stratospheric intrusions (SI) upon near‐surface ozone (O 3 ) surges, predicting the SI‐induced O 3 pollution pose inherent difficulties. Taking a wintertime O 3 surge episode over the Sichuan Basin (SCB) as an example, we find SI contribute 47.8% to near‐surface O 3 levels and reveal the underlying mechanisms. Tropopause folding nearly extends to the deep atmospheric boundary layer over the Tibetan Plateau (TP) due to topographic forcing, driving stratospheric O 3 penetration into the TP's near‐surface. The intruded O 3 is subsequently transported into the downstream SCB by strong downdrafts along the TP's leeward slope. Interestingly, the mountain‐plains solenoid between the TP and the SCB strengthens the downward intrusions of O 3 during both daytime and nighttime, further amplifying the contribution of SI to the SCB's near‐surface O 3 levels. This unique mechanism of O 3 surges could provide new insights for the forecast of unexpected nocturnal high‐O 3 episodes.
Authors
- Zhixiong Chen (ORCID: https://orcid.org/0000-0001-5036-8629)
- Tianliang Zhao (ORCID: https://orcid.org/0000-0001-8285-8315)
- Xiushu Qie (ORCID: https://orcid.org/0000-0003-2956-3790)
- Yuqing Zhang
- Guicai Ning (ORCID: https://orcid.org/0000-0003-0016-4382)
- Jane Liu (ORCID: https://orcid.org/0000-0001-7760-2788)
- Mengwei Jia (ORCID: https://orcid.org/0000-0003-4906-4411)
- Zhen Lu (ORCID: https://orcid.org/0000-0002-3481-6310)
- Xiangde Xu (ORCID: https://orcid.org/0000-0003-0772-5234)
- Xiaoyun Sun (ORCID: https://orcid.org/0000-0002-3740-512X)
- Zhuozhi Shu
Institutions
- Fujian Normal University (CN)
- China Meteorological Administration (CN)
- University of Toronto (CA)
- Chinese Academy of Sciences (CN)
- Nanjing University of Information Science and Technology (CN)
- Jiangsu Institute of Meteorological Sciences (CN)
- Chinese Academy of Meteorological Sciences (CN)
- Institute of Atmospheric Physics (CN)
- Nanjing University (CN)
Publication Details
- Journal
- Geophysical Research Letters
- Published
- 2025-05-19
- DOI
- https://doi.org/10.1029/2024gl114207
- Citations
- 4
- Primary Topic
- Atmospheric Ozone and Climate
- Type
- article
- Field-Weighted Citation Impact
- 5.20
Funders
- National Natural Science Foundation of China
- Nanjing University of Information Science and Technology
- Natural Science Foundation of Anhui Province
- National Key Research and Development Program of China