Articles | Volume 24, issue 3
https://doi.org/10.5194/acp-24-2023-2024
https://doi.org/10.5194/acp-24-2023-2024
Technical note
 | 
15 Feb 2024
Technical note |  | 15 Feb 2024

Technical note: A method for calculating offsets to ozone depletion and climate impacts of ozone-depleting substances

Gabrielle B. Dreyfus, Stephen A. Montzka, Stephen O. Andersen, and Richard Ferris

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Cited articles

Abernethy, S. and Jackson, R. B.: Global temperature goals should determine the time horizons for greenhouse gas emission metrics, Environ. Res. Lett., 17, 024019, https://doi.org/10.1088/1748-9326/ac4940, 2022. 
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Andersen, S. O. and Sarma, K. M.: Protecting the Ozone Layer: The United Nations History, Earthscan Press (official publication of the United Nations Environment Programme), London, England, 513 pp., https://doi.org/10.4324/9781849772266, 2002. 
Andersen, S. O., Gao, S., Carvalho, S., Ferris, T., Gonzalez, M., Sherman, N. J., Wei, Y., and Zaelke, D.: Narrowing feedstock exemptions under the Montreal Protocol has multiple environmental benefits, P. Natl. Acad. Sci. USA, 118, e2022668118, https://doi.org/10.1073/pnas.2022668118, 2021. 
Arias, P. A., Bellouin, N., Coppola, E. et al.: Technical Summary. in: Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Masson-Delmotte, V., Zhai, P., Pirani, A. et al., Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 33−-144, https://doi.org/10.1017/9781009157896.002, 2021. 
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Short summary
The Montreal Protocol has put the ozone layer on a path to recovery by phasing out 99 % of banned ozone-damaging substances. Most of these substances are also potent greenhouse gases. Atmospheric monitoring has detected unexpected increases in emissions in several of these banned substances. Here we present an approach for quantifying damage to ozone, climate and health for these emissions and offset by preventing the equivalent emissions of ozone-damaging substances.
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