Total Ozone and Equivalent Stratospheric Chlorine

Long-term changes in ozone and equivalent stratospheric chlorine (ESC). Chemistry-climate models are used to make projections of total ozone amounts that account for the effects of ozone-depleting substances (ODSs) and climate change. Regional and global projections are shown for total ozone and ESC for the period 1960–2100, referenced to 1960 values. The globe in the center shows average total ozone projections for the last decade of the 21st century.