Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 20
Articles | Volume 25, issue 20
https://doi.org/10.5194/acp-25-13141-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-13141-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 20
Research article
 | 
21 Oct 2025
Research article |  | 21 Oct 2025

Interhemispheric Anti-Phase Variability in Mesospheric Climate Driven by Summer Polar Upwelling During Solstice Months

Liang Zhang, Zhongfang Liu, and Brian Tinsley

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Short summary
Using multi-satellite datasets, the interannual climate variability in upper mesosphere is demonstrated to be anti-phase between the summer and winter hemispheres during solstice months. Summer polar upwelling bottom-up drives opposite water vapor variability between the two hemispheres. Subsequently, mesospheric ozone is negatively modulated by water vapor through ozone chemistry, which further influences temperatures above 90 km via radiative and chemical heating.
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