Impact of a subtropical high and a typhoon on a severe ozone pollution episode in the Pearl River Delta, China

Ouyang, Shanshan; Deng, Tao; Liu, Run; Chen, Jingyang; He, Guowen; Leung, Jeremy Cheuk-Hin; Wang, Nan; Liu, Shaw Chen

doi:https://doi.org/10.5194/acp-22-10751-2022

Articles | Volume 22, issue 16

https://doi.org/10.5194/acp-22-10751-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-22-10751-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 16

Research article

|

25 Aug 2022

Research article |

| 25 Aug 2022

Impact of a subtropical high and a typhoon on a severe ozone pollution episode in the Pearl River Delta, China

Shanshan Ouyang, Tao Deng, Run Liu, Jingyang Chen, Guowen He, Jeremy Cheuk-Hin Leung, Nan Wang, and Shaw Chen Liu

Data sets

ERA5 hourly data on pressure levels from 1959 to present H. Hersbach, B. Bell, P. Berrisford, G. Biavati, A. Horányi, J. Muñoz Sabater, J. Nicolas, C. Peubey, R. Radu, I. Rozum, D. Schepers, A. Simmons, C. Soci, D. Dee, and J.-N. Thépaut https://doi.org/10.24381/cds.bd0915c6

NCEP FNL Operational Model Global Tropospheric Analyses National Centers for Environmental Prediction/National Weather Service/NOAA/U.S. Department of Commerce https://doi.org/10.5065/D6M043C6

Short summary

A record-breaking severe O₃ pollution episode occurred under the influence of a Pacific subtropical high followed by Typhoon Mitag in the Pearl River Delta (PRD) in early Autumn 2019. Through WRF-CMAQ model simulations, we propose that the enhanced photochemical production of O₃ during the episode is a major cause of the most severe O₃ pollution year since the official O₃ observation started in the PRD in 2006.