Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 22
Articles | Volume 25, issue 22
https://doi.org/10.5194/acp-25-15653-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/acp-25-15653-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 22
Research article
 | 
17 Nov 2025
Research article |  | 17 Nov 2025

Challenges in simulating ozone depletion events in the Arctic boundary layer: a case study using ECHAM/MESSy for spring 2019/2020

Stefanie Falk, Luca Reißig, Bianca Zilker, Andreas Richter, and Björn-Martin Sinnhuber

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Short summary
Ozone depletion events (ODEs) and bromine explosions in the Arctic were studied for 2019/20. Our model underestimated boundary layer height and showed warm biases, affecting ODE simulation. Updates improved coastal ozone agreement but failed to capture strong ODEs. Bromine monoxide (BrO) was overestimated at the surface yet underestimated in columns. Long-term data show declining strong ODEs since 2008, suggesting additional climate-driven factors beyond sea ice age.
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