The marker quantification of the Shared Socioeconomic Pathway 2: A middle-of-the-road scenario for the 21st century. Fricko, O., Havlik, P., Rogelj, J., Klimont, Z., Gusti, M., Johnson, N., Kolp, P., Strubegger, M., Valin, H., Amann, M., Ermolieva, T., Forsell, N., Herrero, M., Heyes, C., Kindermann, G., Krey, V., McCollum, D., Obersteiner, M., Pachauri, S., Rao, S., Schmid, E., Schoepp, W., & Riahi, K. Global Environmental Change, 42:251–267, 2017.
doi  abstract   bibtex   
Highlights • The SSP2 narrative is translated in a quantified marker baseline scenario. • This baseline results in a global final energy demand of 640 EJ/yr by 2050. • And leads to 6.7 W/m2 of radiative forcing and 3.9 °C of anthropogenic warming. • Mitigation action can bring this in line with keeping warming well below 2 °C. • SSP2 represents a middle-of-the-road perspective compared to the other SSPs. Abstract Studies of global environmental change make extensive use of scenarios to explore how the future can evolve under a consistent set of assumptions. The recently developed Shared Socioeconomic Pathways (SSPs) create a framework for the study of climate-related scenario outcomes. Their five narratives span a wide range of worlds that vary in their challenges for climate change mitigation and adaptation. Here we provide background on the quantification that has been selected to serve as the reference, or ‘marker’, implementation for SSP2. The SSP2 narrative describes a middle-of-the-road development in the mitigation and adaptation challenges space. We explain how the narrative has been translated into quantitative assumptions in the IIASA Integrated Assessment Modelling Framework. We show that our SSP2 marker implementation occupies a central position for key metrics along the mitigation and adaptation challenge dimensions. For many dimensions the SSP2 marker implementation also reflects an extension of the historical experience, particularly in terms of carbon and energy intensity improvements in its baseline. This leads to a steady emissions increase over the 21st century, with projected end-of-century warming nearing 4 °C relative to preindustrial levels. On the other hand, SSP2 also shows that global-mean temperature increase can be limited to below 2 °C, pending stringent climate policies throughout the world. The added value of the SSP2 marker implementation for the wider scientific community is that it can serve as a starting point to further explore integrated solutions for achieving multiple societal objectives in light of the climate adaptation and mitigation challenges that society could face over the 21st century.
@Article {Fricko2017,
author = {Fricko, O. and Havlik, P. and Rogelj, J. and Klimont, Z. and Gusti, M. and Johnson, N. and Kolp, P. and Strubegger, M. and Valin, H. and Amann, M. and Ermolieva, T. and Forsell, N. and Herrero, M. and Heyes, C. and Kindermann, G. and Krey, V. and McCollum, D.L. and Obersteiner, M. and Pachauri, S. and Rao, S. and Schmid, E. and Schoepp, W. and Riahi, K.}, 
title = {The marker quantification of the Shared Socioeconomic Pathway 2: A middle-of-the-road scenario for the 21st century}, 
journal = {Global Environmental Change}, 
volume = {42}, 
pages = {251--267}, 
year = {2017}, 
doi = {10.1016/j.gloenvcha.2016.06.004}, 
abstract = {Highlights
• The SSP2 narrative is translated in a quantified marker baseline scenario.
• This baseline results in a global final energy demand of 640 EJ/yr by 2050.
• And leads to 6.7 W/m2 of radiative forcing and 3.9 °C of anthropogenic warming.
• Mitigation action can bring this in line with keeping warming well below 2 °C.
• SSP2 represents a middle-of-the-road perspective compared to the other SSPs.

Abstract
Studies of global environmental change make extensive use of scenarios to explore how the future can evolve under a consistent set of assumptions. The recently developed Shared Socioeconomic Pathways (SSPs) create a framework for the study of climate-related scenario outcomes. Their five narratives span a wide range of worlds that vary in their challenges for climate change mitigation and adaptation. Here we provide background on the quantification that has been selected to serve as the reference, or ‘marker’, implementation for SSP2. The SSP2 narrative describes a middle-of-the-road development in the mitigation and adaptation challenges space. We explain how the narrative has been translated into quantitative assumptions in the IIASA Integrated Assessment Modelling Framework. We show that our SSP2 marker implementation occupies a central position for key metrics along the mitigation and adaptation challenge dimensions. For many dimensions the SSP2 marker implementation also reflects an extension of the historical experience, particularly in terms of carbon and energy intensity improvements in its baseline. This leads to a steady emissions increase over the 21st century, with projected end-of-century warming nearing 4 °C relative to preindustrial levels. On the other hand, SSP2 also shows that global-mean temperature increase can be limited to below 2 °C, pending stringent climate policies throughout the world. The added value of the SSP2 marker implementation for the wider scientific community is that it can serve as a starting point to further explore integrated solutions for achieving multiple societal objectives in light of the climate adaptation and mitigation challenges that society could face over the 21st century.}, 
note = { }, 
keywords = {}, 
type = {iCropM}}

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