A MODEL STUDY OF THE ATMOSPHERIC OZONE SENSITIVITY TO SOLAR FLUX SPECTRAL VARIATIONS CAUSED BY SOLAR ACTIVITY

S. P. Smyshlyaev, V. Ya. Galin, P. A. Zimenko, and A. P. Kudryavtsev,

A two-dimensional photochemistry model with dynamical parameters derived from the atmospheric general circulation model is used to estimate the response of atmospheric ozone to solar-induced changes in solar extraterrestrial radiation fluxes. Several numerical tests have been done to evaluate column ozone sensitivity to solar flux variations in different spectral intervals. The calculated ozone is found to have positive response to the solar flux increase at 200—225 nm, while the same enhancement of the solar radiation at 300—325 nm causes a total ozone reduction. Numerical experiments with column ozone response to solar activity changes from minimum to maximum during the 11-year cycle have demonstrated positive changes in the ozone content, while in the lower stratosphere and upper troposphere the production and destruction rates decreased simultaneously.