How Do ‘Future Climate Scenarios’ Shape Climate Science and Inform Policy?
Union of Concerned Scientists
MARCH 17, 2025
Figure 1: Future annual CO 2 emissions in the five illustrative scenarios Source: Sixth Assessment Report of IPCC Working Group I, 2021 By combining radiative forcing (the climate side, represented by the numbers at the end of each scenario name e.g. 1.9 One of the primary applications of IPCC scenarios is in global climate modeling.
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