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Author: Ebi, Kristie L. × Publisher: Heidelberg : Springer ×

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    The IPCC AR5 guidance note on consistent treatment of uncertainties: A common approach across the working groups
    (Heidelberg : Springer, 2011) Mastrandrea, Michael D.; Mach, Katharine J.; Plattner, Gian-Kasper; Edenhofer, Ottmar; Stocker, Thomas F.; Field, Christopher B.; Ebi, Kristie L.; Matschoss, Patrick R.
    Evaluation and communication of the relative degree of certainty in assessment findings are key cross-cutting issues for the three Working Groups of the Intergovernmental Panel on Climate Change. A goal for the Fifth Assessment Report, which is currently under development, is the application of a common framework with associated calibrated uncertainty language that can be used to characterize findings of the assessment process. A guidance note for authors of the Fifth Assessment Report has been developed that describes this common approach and language, building upon the guidance employed in past Assessment Reports. Here, we introduce the main features of this guidance note, with a focus on how it has been designed for use by author teams. We also provide perspectives on considerations and challenges relevant to the application of this guidance in the contribution of each Working Group to the Fifth Assessment Report. Despite the wide spectrum of disciplines encompassed by the three Working Groups, we expect that the framework of the new uncertainties guidance will enable consistent communication of the degree of certainty in their policy-relevant assessment findings.
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    A new scenario framework for climate change research: The concept of shared climate policy assumptions
    (Heidelberg : Springer, 2014) Kriegler, Elmar; Edmonds, Jae; Hallegatte, Stéphane; Ebi, Kristie L.; Kram, Tom; Riahi, Keywan; Winkler, Harald; van Vuuren, Detlef P.
    The new scenario framework facilitates the coupling of multiple socioeconomic reference pathways with climate model products using the representative concentration pathways. This will allow for improved assessment of climate impacts, adaptation and mitigation. Assumptions about climate policy play a major role in linking socioeconomic futures with forcing and climate outcomes. The paper presents the concept of shared climate policy assumptions as an important element of the new scenario framework. Shared climate policy assumptions capture key policy attributes such as the goals, instruments and obstacles of mitigation and adaptation measures, and introduce an important additional dimension to the scenario matrix architecture. They can be used to improve the comparability of scenarios in the scenario matrix. Shared climate policy assumptions should be designed to be policy relevant, and as a set to be broad enough to allow a comprehensive exploration of the climate change scenario space.