Solar cycle variability, ozone, and climate

Results from a global climate model including an interactive parameterizati on of stratospheric chemistry show how upper stratospheric ozone changes ma y amplify observed, 11-year solar cycle irradiance changes to affect climat e. In the model, circulation changes initially induced in the stratosphere subsequently penetrate into the troposphere, demonstrating the importance o f the dynamical coupling between the stratosphere and troposphere. The mode l reproduces many observed 11-year oscillations, including the relatively L ong record of geopotential height variations; hence, it implies that these oscillations are likely driven, at Least in part, by solar variability.