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Changes in stratospheric ozone.

R J Cicerone

    Science (New York, N.Y.)
    |July 3, 1987
    PubMed
    Summary
    This summary is machine-generated.

    The Earth's ozone layer protects us from harmful solar radiation but is threatened by human activities. Increased atmospheric chemicals may already be depleting this vital stratospheric ozone shield.

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    Area of Science:

    • Atmospheric chemistry and physics
    • Environmental science
    • Earth system science

    Background:

    • The ozone layer in the upper atmosphere is a natural Earth feature.
    • It shields the planet from damaging solar ultraviolet (UV) radiation.
    • Ozone concentrations naturally fluctuate due to photochemical production, catalytic destruction, and atmospheric transport.

    Purpose of the Study:

    • To highlight the natural role and dynamics of the ozone layer.
    • To identify anthropogenic threats to stratospheric ozone.
    • To assess the potential for ongoing human-induced impacts on ozone.

    Main Methods:

    • Analysis of atmospheric chemical processes.
    • Modeling of photochemical production and destruction cycles.

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  • Evaluation of fluid dynamical transport in the stratosphere.

    • Main Results:

    • Ozone layer is crucial for shielding Earth from UV radiation.
    • Stratospheric ozone levels are not static and are influenced by natural processes.
    • Human activities are projected to significantly deplete ozone.
    • Anthropogenic increases in atmospheric chemicals are the primary drivers of depletion.

    Conclusions:

    • The ozone layer's integrity is threatened by human-induced chemical changes.
    • Substantial depletion of stratospheric ozone is a projected outcome.
    • Evidence suggests human-induced perturbations to the ozone layer may already be occurring.