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Revising the Ozone Depletion Potentials Metric for Short-Lived Chemicals Such as CF3I and CH3I

AuthorsZhang, J.; Wuebbles, D.J.; Kinnison, D.E.; Saiz-Lopez, A.
KeywordsOzone depletion potential
Short‐lived chemicals
Ozone pollution
Issue Date17-Apr-2020
PublisherAmerican Geophysical Union
CitationJournal of Geophysical Research: Atmospheres 125: e2020JD032414 (2020)
AbstractOzone 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 (CFI) and methyl iodide (CHI) 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) CFI, with slightly larger destruction of stratospheric ozone from CHI (~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.
Description12 pags., 5 figs., 2 tabs.
Publisher version (URL)http://dx.doi.org/10.1029/2020JD032414
Identifiersdoi: 10.1029/2020JD032414
issn: 2169-8996
Appears in Collections:(IQFR) Artículos
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