Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 7
Articles | Volume 25, issue 7
https://doi.org/10.5194/acp-25-3961-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-3961-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 7
Research article
 | 
09 Apr 2025
Research article |  | 09 Apr 2025

Stratospheric circulation response to large Northern Hemisphere high-latitude volcanic eruptions in a global climate model

Hera Guðlaugsdóttir, Yannick Peings, Davide Zanchettin, and Gudrun Magnusdottir

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Short summary
Here we use an Earth system model to simulate a long-lasting volcanic eruption at 65° N and investigate its impact on the stratospheric circulation. We show a polar vortex strengthening in winter 1, followed by a weakening in winters 2–3 due to surface cooling, where ocean–atmosphere interactions play a major role in the detected response. This weakening appears to trigger sudden stratospheric warming events that can cause severe cold spells throughout the Northern Hemisphere.  
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