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Projected Change in Ground-Level Ozone, 2090s

Projected Change in Ground-Level Ozone, 2090s

The maps show projected changes in ground-level ozone (a component of smog) for the 2090s, averaged over the summer months (June through August), relative to 1996-2000, under lower and higher emissions scenarios, which include both greenhouse gases and emissions that lead to ozone formation (some of which decrease under the lower emissions scenario).1 By themselves, higher temperatures and other projected climate changes would increase ozone levels under both scenarios. However, the maps indicate that future projections of ozone depend heavily on emissions, with the higher emissions scenario1 increasing ozone by large amounts, while the lower emissions scenario1 results in an overall decrease in ground-level ozone by the end of the century.2  Image Reference: Tao et al.2



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