Articles | Volume 23, issue 21
https://doi.org/10.5194/acp-23-13701-2023
https://doi.org/10.5194/acp-23-13701-2023
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

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Cited articles

An, M. D., Western, L. M., Say, D., Chen, L. Q., Claxton, T., Ganesan, A. L., Hossaini, R., Krummel, P. B., Manning, A. J., Mühle, J., O'Doherty, S., Prinn, R. G., Weiss, R. F., Young, D., Hu, J. X., Yao, B., and Rigby, M.: Rapid increase in dichloromethane emissions from China inferred through atmospheric observations. Nat. Commun., 12, 7279, https://doi.org/10.1038/s41467-021-27592-y, 2021. 
Ball, W. T., Alsing, J., Staehelin, J., Davis, S. M., Froidevaux, L., and Peter, T.: Stratospheric ozone trends for 1985–2018: sensitivity to recent large variability, Atmos. Chem. Phys., 19, 12731–12748, https://doi.org/10.5194/acp-19-12731-2019, 2019. 
Ball, W. T., Chiodo, G., Abalos, M., Alsing, J., and Stenke, A.: Inconsistencies between chemistry–climate models and observed lower stratospheric ozone trends since 1998, Atmos. Chem. Phys., 20, 9737–9752, https://doi.org/10.5194/acp-20-9737-2020, 2020. 
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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.
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