Figure 11.1

U.S. Environmental Protection Agency, U.S. Environmental Protection Agency Office of Research and Development
Philip Morefield

This figure appears in chapter 11 of the Impacts, Risks, and Adaptation in the United States: The Fourth National Climate Assessment, Volume II report.

These maps show current population along with population projections by county for the year 2100. Projected populations are based on Shared Socioeconomic Pathways (SSPs)—a collection of plausible future pathways of socioeconomic development.9c909a77-a1d9-477d-82fc-468a6b1af771 The middle map is based on demography consistent with the SSP2, which follows a middle-of-the-road path where trends do not shift markedly from historical patterns. The bottom map uses demography consistent with SSP5, which follows a more rapid technical progress and resource-intensive development path. Increasing urban populations pose challenges to planners and city managers as they seek to maintain and improve urban environments. Data are unavailable for the U.S. Caribbean, Alaska, and Hawai‘i & U.S.-Affiliated Pacific Islands regions. Source: EPA

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This figure was created on August 02, 2017.

This figure was submitted on December 03, 2018.

References :

• chapter climate-science-special-report chapter 4 : Climate Models, Scenarios, and Projections (9c909a77)

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