On the recovery of the ozone layer in the northern hemisphere in the XXI century

Abstract

The time limits of the recovery of the ozone layer in the latitudinal zones 0°–85°, 0°–30°, 30°–60°, and 60°–85° of the Northern Hemisphere in the XXI century are calculated. The calculations are performed using the Socrates interactive chemical dynamical radiative two-dimensional model of the middle atmosphere (at altitudes 0–120 km). The input data for the calculations are based on the RCP 4.5 and 6.0 predictive scenarios of the Intergovernmental Panel on Climate Change (IPCC) on the concentrations of greenhouse gases. It is shown, in particular, that, after the recovery, the ozone layer will continue to grow and by the end of the XXI century will reach a steady-state level surpassing the undisturbed, pre-Freon-era level, which poses no less an environmental threat than the depletion of the ozone layer in the late XX century.