What caused large ozone variabilities in three megacity clusters in eastern China during 2015–2020?

Hu, Tingting; Lin, Yu; Liu, Run; Xu, Yuepeng; Ouyang, Shanshan; Wang, Boguang; Zhang, Yuanhang; Liu, Shaw Chen

doi:https://doi.org/10.5194/acp-24-1607-2024

Articles | Volume 24, issue 3

https://doi.org/10.5194/acp-24-1607-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-24-1607-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 3

Research article

|

05 Feb 2024

Research article |

| 05 Feb 2024

What caused large ozone variabilities in three megacity clusters in eastern China during 2015–2020?

Tingting Hu, Yu Lin, Run Liu, Yuepeng Xu, Shanshan Ouyang, Boguang Wang, Yuanhang Zhang, and Shaw Chen Liu

Supplement

https://doi.org/10.5194/acp-24-1607-2024-supplement

Data sets

ERA5 hourly data on single levels from 1940 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.adbb2d47

The NCEP/NCAR 40-Year Reanalysis Project E. Kalnay, M. Kanamitsu, R. Kistler, W. Collins, D. Deaven, L. Gandin, M. Iredell, S. Saha, G. White, J. Woollen, Y. Zhu, M. Chelliah, W. Ebisuzaki, W. Higgins, J. Janowiak, K. C. Mo, C. Ropelewski, J. Wang, A. Leetmaa, R. Reynolds, R. Jenne, and D. Joseph https://doi.org/10.1175/1520-0477(1996)077<0437:TNYRP>2.0.CO;2

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Short summary

We hypothesize that the cause of the worsening O₃ trends in the Beijing–Tianjin–Hebei region, the Yangtze River Delta, and Pearl River Delta from 2015 to 2020 is attributable to the increased occurrence of meteorological conditions of high solar radiation and a positive temperature anomaly under the influence of West Pacific subtropical high, tropical cyclones, and mid–high-latitude wave activities.