Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 24, issue 10
Articles | Volume 24, issue 10
https://doi.org/10.5194/acp-24-5837-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-24-5837-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 24, issue 10
Research article
 | 
22 May 2024
Research article |  | 22 May 2024

Influences of sudden stratospheric warmings on the ionosphere above Okinawa

Klemens Hocke, Wenyue Wang, and Guanyi Ma

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Short summary
We find a sudden stratospheric warming (SSW) effect in the F2 critical frequency (foF2) series for Okinawa. Across 29 SSW events, the amplitude of the semidiurnal cycle of foF2 peaks at the SSW onset in the SSW years. In these years, we find, for the first time, a lunar terdiurnal component with a relative amplitude of about 5 %, and lunar diurnal and semidiurnal components have relative amplitudes of about 10 %. The periods of lunar ionospheric tidal variations align with those of ocean tides.
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