RESPONSE OF AN INTERACTIVE 2-DIMENSIONAL MODEL TO OZONE CHANGES - AN ESTIMATE OF THE RADIATIVE DYNAMIC FEEDBACK EFFECT

A simplified ozone chemistry model was used. The radiative dynamical feedback in the model leads to a recovery of about one third of the calculated ozone decrease at high altitudes, and to about one sixth of the predicted losses in the column densities at high latitudes when compared with predictions by a model with fixed temperature and circulation. A simple interpretation of the adjustment of dynamical quantities is obtained by comparing the global mean and the differential solar heating rates derived from perturbed and unperturbed ozone distributions. The feedback effect can be qualitatively described as 1) an adjustment of the global mean temperature in response to global mean solar heating changes and 2) an approximately linear response in all other dynamical variables, proportional to the change in the differential heating. -from Authors