In this study, comparison of model results and satellite observations reveals that the Whole-Atmosphere Community Climate Model （WACCM-3） reasonably well reproduced the distributions and seasonal vari- ations of C10 and HC1 concentrations. In three greenhouse gas emission scenarios （A1B, A2, and B1）, the C10, C1, C1ONO2, and HC1 concentrations would gradually decrease with time as emissions of ozone depleting substances （ODS） steadily decrease. The rates of the changes in the C10, C1, C1ONO2, and HC1 concentrations are different in the same emission scenario and the rates of change in the same composition concentration are different for different emission scenarios. The C10, C1, and C1ONO2 concentrations de- crease fastest in scenario A2, next fastest in scenario A1B, and slowest in scenario B1. In contrast, the HC1 concentration decreases fastest in scenario B1. The ozone concentration recovers quickly, and is highest in scenario A2. The results show that a rapid decrease in the C10 concentration is an important reason for the accelerated recovery of the ozone layer in scenario A2.
