The Shared Socioeconomic Pathways (SSPs) present five potential global socioeconomic scenarios up to 2100, considering factors like population, economic growth, and technological development. These scenarios envision how the world might progress without new climate policies beyond those already adopted by countries (excluding commitments to enact new policies in the future):
- SSP1: Sustainability (Taking the Green Road)
- SSP2: Middle of the Road
- SSP3: Regional Rivalry (A Rocky Road)
- SSP4: Inequality (A Road divided)
- SSP5: Fossil-fueled Development (Taking the Highway)
In its 6th report, the IPCC pairs these SSPs with the Representative Concentration Pathways (RCPs) from the 5th report to predict possible climate outcomes. Each SSP links a socioeconomic narrative with a specific warming level.
WY-Adapt uses the SSP370 scenario, combining SSP3's "Rocky Road" socioeconomic projections with a 7.0 watts per square meter increase in radiative forcing by 2100, a 7 w/m² rise since 1750.
SSP3: Regional Rivalry – A Rocky Road (High challenges to mitigation and adaptation)
A resurgent nationalism, concerns about competitiveness and security, and regional conflicts push countries to increasingly focus on domestic or, at most, regional issues. Policies shift over time to become increasingly oriented toward national and regional security issues. Countries focus on achieving energy and food security goals within their own regions at the expense of broader-based development. Investments in education and technological development decline. Economic development is slow, consumption is material-intensive, and inequalities persist or worsen over time. Population growth is low in industrialized and high in developing countries. A low international priority for addressing environmental concerns leads to strong environmental degradation in some regions.