Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 1
Articles | Volume 26, issue 1
https://doi.org/10.5194/acp-26-665-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-665-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 1
Research article
 | 
15 Jan 2026
Research article |  | 15 Jan 2026

Impacts of increasing CO2 on diurnal migrating tide in the equatorial lower thermosphere

Masaru Kogure, In-Sun Song, Huixin Liu, and Han-Li Liu

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Latest update: 02 May 2026
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Short summary
We investigate how rising CO₂ changes the migrating diurnal tide driven by solar heating and latent heat. Using a state-of-the-art model under the most extreme scenario in the Intergovernmental Panel on Climate Change report, we find that the tide strengthens between 20–70 km but weakens between 90–110 km. The increase likely reflects lower density and stronger tropical convection, whereas the decrease is consistent with enhanced diffusion.
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