Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 6
Articles | Volume 25, issue 6
https://doi.org/10.5194/acp-25-3635-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-3635-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 6
Research article
 | 
27 Mar 2025
Research article |  | 27 Mar 2025

Did the 2022 Hunga eruption impact the noctilucent cloud season in 2023/24 and 2024?

Sandra Wallis, Matthew DeLand, and Christian von Savigny

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Short summary
The 2022 Hunga Tonga – Hunga Ha'apai eruption emitted about 150 Tg H2O that partly reached the upper polar Southern Hemisphere mesosphere in the beginning of 2024. Noctilucent clouds (NLCs) did not show a clear perturbation in their occurrence frequency, but the slight increase from mid-January to February could potentially have been caused by the additional H2O. It needed 2 years to reach the summer polar mesopause region, analogous to the 1883 Krakatoa eruption that is argued to have caused the first sightings of NLCs.
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