ABSTRACT
This chapter explains how the final calculations are made, and presents a set of production scenarios based on the technique and the corresponding ozone depletion calculated for these scenarios using an atmospheric simulation model. The calculated change in total column ozone represents an annual global average of the seasonally and latitudinally varying changes that are expected to result from potential ozone depleter (POD) and other trace-gas emissions. Development of the scenarios starts with chemical weights for the score function that reflects relative production levels in 1985. The projected ozone depletion corresponding to these joint emission scenarios can be calculated using computer-based atmospheric models. The calculated change in total column ozone represents an annual global average of the seasonally and latitudinally varying changes that are expected to result from POD and other trace-gas emissions. To calculate the predicted effects on ozone of the joint POD emission scenarios, trends for other atmospheric trace species must be assumed.
