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Do hydrofluorocarbons destroy stratospheric ozone?

A R Ravishankara, A A Turnipseed, N R Jensen

    Science (New York, N.Y.)
    |January 7, 1994
    PubMed
    Summary
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    Hydrofluorocarbons containing CF(3) groups are ozone-friendly alternatives. Studies show the CF(3) radical

    Area of Science:

    • Atmospheric Chemistry
    • Environmental Science

    Background:

    • Hydrofluorocarbons (HFCs) are replacements for ozone-depleting chlorofluorocarbons and halons.
    • The CF(3) group is common in HFCs, necessitating an evaluation of its ozone depletion potential.

    Purpose of the Study:

    • To assess the impact of the CF(3) radical on stratospheric ozone depletion.
    • To quantify the ozone depletion potentials associated with the CF(3) group in HFCs.

    Main Methods:

    • Measured rate coefficients for key reactions involving the CF(3) radical.
    • Utilized atmospheric modeling to calculate potential ozone depletion.

    Main Results:

    • Determined the efficiency of the CF(3) radical as a catalyst for ozone loss.

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  • Calculated ozone depletion potentials based on experimental and modeled data.

    • Conclusions:

    • The ozone depletion potentials associated with the CF(3) group in hydrofluorocarbons are negligibly small.
    • HFCs containing CF(3) groups are unlikely to cause significant stratospheric ozone depletion.