Policy relevance

The Energy (ENE) Program is providing policy guidance and strategic advice to decision makers in various international settings. Major policy-relevant activities and scientific policy advice in 2014 included the 2014 GAP report of the United Nations Environment Program (UNEP), Sustainable Energy for All (SE4All), and contributions to the Summary for Policymakers of the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC, Working Group I, III, and the Synthesis Report).

Adapted from: © Creator76 | Dreamstime

Adapted from: © Creator76 | Dreamstime

IPCC Fifth Assessment Report (AR5)

Twelve researchers from ENE served as Authors of the IPCC Fifth Assessment Report (IPCC AR5). These were: Luis Gomez-EcheverriArnulf GrueblerJessica Jewell, Nils JohnsonPeter Kolp, Volker KreyDavid McCollumNebojsa NakicenovicKeywan RiahiJoeri Rogelj, Holger Rogner, and Mathis Rogner.

Krey, Riahi, and Rogelj participated in the IPCC approval sessions and the negotiations with government delegations (in Berlin and Copenhagen) which led to the final approval of the AR5 Working Group III (WGIII) Report and the Synthesis Report. Krey and Riahi served on the Summary for Policymakers and coordinated critical areas across Working Group III. Rogelj was an author on both the WGI and WGIII report.

ENE is hosting critical datasets for the IPCC AR5, including the Representative Concentration Pathways (RCPs) database, the Shared Socioeconomic Pathways (SSPs) database and the IPCC AR5 scenario database. In 2014 ENE launched the IPCC AR5 scenario database to make major research products freely accessible to scientific peers, policymakers, and the public.

The IPCC assessment of mitigation strategies for limiting climate change builds heavily upon recent international multi-model comparison projects co-led by ENE, for example, the Energy Modeling Forum (EMF27) the AMPERE project, and the LIMITS project.


ENE’s Joeri Rogelj, David McCollum, Volker Krey and Keywan Riahi were among the international team of 38 scientists convened by the UNEP Emissions Gap Report 2014, presented to world leaders at the 2014 international climate negotiations in Lima. The Report emphasizes the need for global carbon emissions to be reduced to zero if global warming is to be stabilized at any level.

UNFCCC activities

In 2014 the international climate negotiations of the Un Framework Convention on Climate Change (UNFCCC) worked toward a new global agreement scheduled for conclusion in 2015, including determining the adequacy of the long-term 2°C limit to warming. IIASA's ENE scholars Volker Krey and Joeri Rogelj participated in a Structured Expert Dialogue (SED) between UNFCCC policymakers and stakeholders and scientific experts, and provided key insights from the integrated assessment modeling literature on transformation pathways towards limiting global temperature rise to 1.5 or 2°C. 

Stakeholder and policymaker interactions

ENE co-organized two conferences in Brussels in January and September 2014 to disseminate and communicate key findings related to climate change mitigation research to international and European stakeholders and policymakers.

Sustainable Energy for All (SE4All) 

ENE participated in an effort to explore linkages between SE4All objectives and other sustainability goals to assess how achievement of SE4All can help progress on global problems on poverty eradication and climate change.

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Last edited: 05 May 2015


Keywan Riahi

Program Director and Principal Research Scholar Energy, Climate, and Environment Program

Principal Research Scholar Integrated Assessment and Climate Change Research Group - Energy, Climate, and Environment Program

Principal Research Scholar Pollution Management Research Group - Energy, Climate, and Environment Program

Principal Research Scholar Sustainable Service Systems Research Group - Energy, Climate, and Environment Program

Research program

Further information



Intergovernmental Panel on Climate Change

International Institute for Applied Systems Analysis (IIASA)
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Phone: (+43 2236) 807 0 Fax:(+43 2236) 71 313