The return to 1980 stratospheric halogen levels: a moving target in ozone assessments from 2006 to 2022

Lickley, Megan J.; Daniel, John S.; McBride, Laura A.; Salawitch, Ross J.; Velders, Guus J. M.

doi:https://doi.org/10.5194/acp-24-13081-2024

Articles | Volume 24, issue 22

https://doi.org/10.5194/acp-24-13081-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-24-13081-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 22

Research article

|

27 Nov 2024

Research article |

| 27 Nov 2024

The return to 1980 stratospheric halogen levels: a moving target in ozone assessments from 2006 to 2022

Megan J. Lickley, John S. Daniel, Laura A. McBride, Ross J. Salawitch, and Guus J. M. Velders

Supplement

https://doi.org/10.5194/acp-24-13081-2024-supplement

Data sets

The-return-to-1980-stratospheric-halogen-levels-A-moving-target-in-ozone-assessments: v1: Code for Lickley et al. (2024), ACP Megan Lickley, Ross Salawitch, and John Daniel https://doi.org/10.5281/zenodo.13952811

Model code and software

The-return-to-1980-stratospheric-halogen-levels-A-moving-target-in-ozone-assessments: v1: Code for Lickley et al. (2024), ACP Megan Lickley, Ross Salawitch, and John Daniel https://doi.org/10.5281/zenodo.13952811

Download

Article (1649 KB)
Full-text XML

Short summary

The expected ozone recovery date was delayed by 17 years between the 2006 and 2022 international scientific assessments of ozone depletion. We quantify the primary drivers of this delay. Changes in the metric used to estimate ozone recovery explain ca. 5 years of this delay. Of the remaining 12 years, changes in estimated banks, atmospheric lifetimes, and emission projections explain 4, 3.5, and 3 years of this delay, respectively.