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Stratospheric ozone concentration projections, 1960 to 2100

Stratospheric ozone concentrations with projections to 2100 based on chemistry-climate models. Ozone concentrations are measured relative to levels in 1960 (1960 =
0), and measured as the global average, and regional average. Figures represent the mean across a number of model runs; model projections have notable
uncertainty around such average trends.

19602100198020002020204020602080AntarcticArcticGlobal

Source: Hegglin et al. (2014). Twenty questions and answers about the ozone layer: 2014 update.