Atmospheric impacts of chlorinated very short-lived substances over the recent past – Part 2: Impacts on ozone

Bednarz, Ewa M.; Hossaini, Ryan; Chipperfield, Martyn P.

doi:https://doi.org/10.5194/acp-23-13701-2023

Articles | Volume 23, issue 21

https://doi.org/10.5194/acp-23-13701-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Atmospheric ozone and related species in the early 2020s:...

https://doi.org/10.5194/acp-23-13701-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 21

Research article

|

03 Nov 2023

Research article |

| 03 Nov 2023

Atmospheric impacts of chlorinated very short-lived substances over the recent past – Part 2: Impacts on ozone

Ewa M. Bednarz, Ryan Hossaini, and Martyn P. Chipperfield

Supplement

https://doi.org/10.5194/acp-23-13701-2023-supplement

Data sets

Data from ``Atmospheric impacts of chlorinated very short-lived substances over the recent past – Part 2: Impacts on ozone'' by Bednarz et al. (2023), in: Atmospheric Chemistry and Physics E. M. Bednarz https://doi.org/10.5281/zenodo.10038725

Model code and software

Unified Model Met Office https://www.metoffice.gov.uk/research/approach/modelling-systems/unified-model

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Short summary

We quantify, for the first time, the time-varying impact of uncontrolled emissions of chlorinated very short-lived substances (Cl-VSLSs) on stratospheric ozone using a state-of-the-art chemistry-climate model. We demonstrate that Cl-VSLSs already have a non-negligible impact on stratospheric ozone, including a local reduction of up to ~7 DU in Arctic ozone in the cold winter of 2019/20, and any so future growth in emissions will continue to offset some of the benefits of the Montreal Protocol.