Revising the ozone depletion potentials metric for short-lived chemicals such as CF3I and CH3I

Ozone depletion potentials (ODPs) are an important metric in national and international policy for evaluating the relative importance of different gases to affecting stratospheric ozone. In evaluating the ODPs of iodotrifluoromethane (CF3I) and methyl iodide (CH3I) using the recently updated understanding of atmospheric iodine chemistry, only minor ozone loss would be expected to occur in the stratosphere from the very short-lived (6 days) CF3I, with slightly larger destruction of stratospheric ozone from CH3I (12 days). In addition, most of the ozone destruction would likely occur in the lower troposphere over continental surfaces, reducing anthropogenic ozone pollution. The traditional ODP concept uses total column ozone change, but this is not an accurate representation of potential future use of very short-lived substances (VSLSs) on the abundance of stratospheric ozone. A new metric, Stratospheric ODP (or SODP), is defined that only accounts for stratospheric ozone loss, providing a useful additional tool for policy considerations of VSLSs on stratospheric ozone.

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Author Zhang, J.
Wuebbles, D. J.
Kinnison, Douglas E.
Saiz-Lopez, A.
Publisher UCAR/NCAR - Library
Publication Date 2020-05-16T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2025-07-11T19:19:14.935812
Metadata Record Identifier edu.ucar.opensky::articles:23392
Metadata Language eng; USA
Suggested Citation Zhang, J., Wuebbles, D. J., Kinnison, Douglas E., Saiz-Lopez, A.. (2020). Revising the ozone depletion potentials metric for short-lived chemicals such as CF3I and CH3I. UCAR/NCAR - Library. https://n2t.org/ark:/85065/d7dv1p3g. Accessed 11 August 2025.

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