Summary of Stratospheric Ozone Depletion

FIGURE 5.29 Vertical distribution of the relative contributions by different catalytic cycles to the 03 loss rate (WMO 1998). [After Osterman et al. (1997) updated to current kinetic parameters.] 

FIGURE 5.30 Change in 03 column relative to 1980 value for the atmosphere between 60°S and 60°N. Measurements based on a variety of satellite and ground-based instruments (WMO 2002). 

FIGURE 5.31 Rate coefficients of rate-determining reactions in 03 loss catalytic cycles. 

The total estimated 03 loss rate is 9 x 105 molecules cm-3 s1, about 80% of which is attributable to N02 + 0 (NO cycle 1) and 10% each to the Chapman cycle and CIO + O (CIO cycle 1). 

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