Shared Socioeconomic Pathways

[3] In terms of quantitative elements, they provide data accompanying the scenarios on national population, urbanization and GDP (per capita).

[8][9] "The world shifts gradually, but pervasively, toward a more sustainable path, emphasizing more inclusive development that respects predicted environmental boundaries.

"[4][12] "The world follows a path in which social, economic, and technological trends do not shift markedly from historical patterns.

Development and income growth proceeds unevenly, with some countries making relatively good progress while others fall short of expectations.

Global and national institutions work toward but make slow progress in achieving sustainable development goals.

Income inequality persists or improves only slowly and challenges to reducing vulnerability to societal and environmental changes remain.

Countries focus on achieving energy and food security goals within their own regions at the expense of broader-based development.

[2][4][5] The names of these scenarios consist of the SSP on which they are based (SSP1-SSP5), combined with the expected level of radiative forcing in the year 2100 (1.9 to 8.5 W/m2).

Predicted atmospheric CO₂ concentrations for different shared socioeconomic pathways (SSPs) across the 21st century (projected by MAGICC7, a simple/reduced complexity climate model). Each data point represents an average of simulated values generated from five integrated assessment models . [ 1 ]
Methane emissions projections for different shared socioeconomic pathways [ 10 ]
SSPs mapped in the challenges to mitigation/adaptation space [ 11 ]