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]
Shared Socioeconomic Pathways (SSPs) are climate change scenarios of projected socioeconomic global changes up to 2100 as defined in the IPCC Sixth Assessment Report on climate change in 2021.[2] They are used to derive greenhouse gas emissions scenarios with different climate policies.[3][4][5] The SSPs provide narratives describing alternative socio-economic developments. These storylines are a qualitative description of logic relating elements of the narratives to each other.[3] In terms of quantitative elements, they provide data accompanying the scenarios on national population, urbanization and GDP (per capita).[6] The SSPs can be quantified with various Integrated Assessment Models (IAMs) to explore possible future pathways both with regards to socioeconomic and climate pathways.[4][5][6]
The five scenarios are:
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") [7]
There are also ongoing efforts to downscaling European shared socioeconomic pathways (SSPs) for agricultural and food systems, combined with representative concentration pathways (RCP) to regionally specific, alternative socioeconomic and climate scenarios.[8][9]
^Meinshausen, M., Nicholls, Z. R. J., Lewis, J., Gidden, M. J., Vogel, E., Freund, M., Beyerle, U., Gessner, C., Nauels, A., Bauer, N., Canadell, J. G., Daniel, J. S., John, A., Krummel, P. B., Luderer, G., Meinshausen, N., Montzka, S. A., Rayner, P. J., Reimann, S., . . . Wang, R. H. J. (2020). The shared socio-economic pathway (SSP) greenhouse gas concentrations and their extensions to 2500. Geoscientific Model Development, 13(8), 3571–3605. https://doi.org/10.5194/gmd-13-3571-2020 Archived 2023-04-16 at the Wayback Machine
^"Climate Change 2021 - The Physical Science Basis" (PDF). ipcc.ch. Archived (PDF) from the original on 13 August 2021. Retrieved 15 August 2021.
SharedSocioeconomicPathways (SSPs) are climate change scenarios of projected socioeconomic global changes up to 2100 as defined in the IPCC Sixth Assessment...
Sixth Assessment Report the original pathways are now being considered together with SharedSocioeconomicPathways. There are three new RCPs, namely RCP1...
Sixth Assessment Report the original pathways are now being considered together with SharedSocioeconomicPathways. There are three new RCPs, namely RCP1...
concentrations for land use and energy. Wise et al., Science, 2009. The sharedsocioeconomicpathways and their energy, land use, and greenhouse gas emissions implications:...
included in climate models for the first time, in the form of five SharedSocioeconomicPathways: SSP1 "Taking the Green Road", SSP2 "Middle of the Road", SSP3...
research including energy policy assessment and simulate the Sharedsocioeconomicpathways. Notable modelling frameworks include IMAGE, MESSAGEix, AIM/GCE...
as required for the future SharedSocioeconomicPathways (SSPs) which have replaced the Representative Concentration Pathways (RCPs) from prior models....
would be around 500 million under SSP2. Some variations of SharedSocioeconomicPathways with high climate change and a lack of equitable global development...
Switzerland Sham Shui Po station, Hong Kong metro (by station code) SharedSocioeconomicPathways, for greenhouse gas scenarios Species Survival Plan, to home...
Different scenarios of projected socioeconomic global changes are modelled by using the SharedSocioeconomicPathways (SSP) scenarios. Under a very high...
There are three broad pathways by which these effects can take place: directly, indirectly or via awareness. The direct pathway includes stress-related...
November 2017). "Linking sea level rise and socioeconomic indicators under the SharedSocioeconomicPathways". Environmental Research Letters. 12 (11):...
research including energy policy assessment and simulate the Sharedsocioeconomicpathways. Notable modelling frameworks include IMAGE, MESSAGEix, AIM/GCE...
Projections of population growth Representative Concentration PathwaySharedSocioeconomicPathways Works falling into the public domain in the United States...
November 2017). "Linking sea level rise and socioeconomic indicators under the SharedSocioeconomicPathways". Environmental Research Letters. 12 (11):...
development strategy is central to sustainable development, and that the share of global emissions originating in developing countries will grow to meet...
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