Articles | Volume 22, issue 5
Atmos. Chem. Phys., 22, 3493–3505, 2022
https://doi.org/10.5194/acp-22-3493-2022
Atmos. Chem. Phys., 22, 3493–3505, 2022
https://doi.org/10.5194/acp-22-3493-2022

Research article 16 Mar 2022

Research article | 16 Mar 2022

Dynamical evolution of a minor sudden stratospheric warming in the Southern Hemisphere in 2019

Guangyu Liu et al.

Data sets

The JRA-55 Reanalysis: general specifications and basic characteristics (https://jra.kishou.go.jp/JRA-55/index_en.html) S. Kobayashi, Y. Ota, Y. Harada, A. Ebita, M. Moriya, H. Onoda, K. Onogi, H. Kamahori, C. Kobayashi, H. Endo, K. Miyaoka, and K. Takahashi https://doi.org/10.2151/jmsj.2015-001

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Short summary
The sudden stratospheric warming (SSW) event that occurred in September 2019 in the Southern Hemisphere was analyzed. A large warming and decelerated westerly winds were observed in the southern polar region. Since a reversal from westerly to easterly winds did not take place SSW2019 was classified as a minor SSW. The total wave forcing and the contribution from PW1 were larger in 2019. The strong and long-lasting planetary-scale waves with zonal wavenumber 1 played a role in SSW2019.
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