Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 24, issue 18
Articles | Volume 24, issue 18
https://doi.org/10.5194/acp-24-10305-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-24-10305-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 24, issue 18
Research article
 | 
18 Sep 2024
Research article |  | 18 Sep 2024

Beyond self-healing: stabilizing and destabilizing photochemical adjustment of the ozone layer

Aaron Match, Edwin P. Gerber, and Stephan Fueglistaler

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Latest update: 23 Oct 2025
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Short summary
Earth's ozone layer absorbs incoming UV light, protecting life. Removing ozone aloft allows UV light to penetrate deeper, where it is known to produce new ozone, leading to "self-healing" that partially stabilizes total ozone. However, a photochemistry model shows that, above 40 km in the tropics, deeper-penetrating UV destroys ozone, destabilizing the total ozone. Photochemical theory reveals that this destabilizing regime occurs where overhead ozone is below a key threshold.
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