The response of ozone to solar activity variations - A review

Physics

Scientific paper

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Atmospheric Chemistry, Atmospheric Effects, Nitrogen Oxides, Ozone, Solar Activity Effects, Ultraviolet Radiation, Nimbus 4 Satellite, Photolysis, Radiation Effects, Satellite Observation, Stratosphere

Scientific paper

The effects of solar UV variations on the ozone concentration in the atmosphere are studied with respect to determinations of the global mean ozone concentrations as measured by satellite instrumentation. The Nimbus 4 satellite revealed an NO presence, which catalytically destroys ozone, during a solar proton event. An 11-year UV variability has been detected at increasing wavelengths above 1500 A, an energy band which causes photolysis of O2 into O3, N2O into NO, and NO production in the stratosphere. The latter two reactions decrease ozone destruction. IR interferometer spectrometer (IRIS) data is cited to show an ozone variation of about 3%, which is possible with a 20% solar UV variability at 1800 A; the variability has been confirmed to exist by measurements taken from the Atmospheric Explorer E satellite.

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