Dataset Restricted Access

IAMC 1.5°C Scenario Explorer and Data hosted by IIASA

Huppmann, Daniel; Kriegler, Elmar; Krey, Volker; Riahi, Keywan; Rogelj, Joeri; Calvin, Katherine; Humpenoeder, Florian; Popp, Alexander; Rose, Steven K.; Weyant, John; Bauer, Nico; Bertram, Christoph; Bosetti, Valentina; Doelman, Jonathan; Drouet, Laurent; Emmerling, Johannes; Frank, Stefan; Fujimori, Shinichiro; Gernaat, David; Grubler, Arnulf; Guivarch, Celine; Haigh, Martin; Holz, Christian; Iyer, Gokul; Kato, Etsushi; Keramidas, Kimon; Kitous, Alban; Leblanc, Florian; Liu, Jing-Yu; Löffler, Konstantin; Luderer, Gunnar; Marcucci, Adriana; McCollum, David; Mima, Silvana; Sands, Ronald D.; Sano, Fuminori; Strefler, Jessica; Tsutsui, Junichi; Van Vuuren, Detlef; Vrontisi, Zoi; Wise, Marshall; Zhang, Runsen

Hosting institution(s)
International Institute for Applied Systems Analysis (IIASA); Integrated Assessment Modeling Consortium (IAMC)

As part of the IPCC's Special Report on Global Warming of 1.5°C (SR15), an assessment of quantitative, model-based climate change mitigation pathways was conducted. To support the assessment, the Integrated Assessment Modeling Consortium (IAMC) facilitated a coordinated and systematic community effort by inviting modelling teams to submit their available 1.5°C and related scenarios to a curated database. The compilation and assessment of the scenario ensemble was conducted by authors of the IPCC SR15, and the resource is hosted by the International Institute for Applied Systems Analysis (IIASA) as part of a cooperation agreement with Working Group III of the IPCC. The scenario ensemble contains more than 400 emissions pathways with underlying socio-economic development, energy system transformations and land use change until the end of the century, submitted by over a dozen research teams from around the world. The criteria for submission included that the scenario is presented in a peer-reviewed journal accepted for publication no later than May 15, 2018, or published in a report determined by the IPCC to be eligible grey literature by the same date.

This release extends the original scenario ensemble with additional timeseries data on prices related to agiculture and food supply, which was used in the IPCC's Special Report on Climate Change and Land (SRCCL).

The data is available for download at the IAMC 1.5°C Scenario Explorer hosted by IIASA. The license permits use of the scenario ensemble for scientific research and science communication, but restricts redistribution of substantial parts of the data. Please refer to the FAQ and legal code for more information.

Restricted Access

You may request access to the files in this upload, provided that you fulfil the conditions below. The decision whether to grant/deny access is solely under the responsibility of the record owner.


The data is available for download at the IAMC 1.5°C Scenario Explorer hosted by IIASA under a license which permits use of the scenario ensemble for scientific research and science communication, but restricts redistribution of substantial parts of the data.

We are committed to making the scenario ensemble available as widely as possible, and to encourage broad use of  the data for research, science communication and policy analysis in the context of global warming of 1.5°C and sustainable development. We want to facilitate the dialogue on pathways at the interface between science and policy, and we aim to support a better understanding of the scientific basis of the IPCC Special Report on Global Warming of 1.5°C by releasing this scenario ensemble.

Nevertheless, we anticipate regular updates of the scenario ensemble. This may be either due to adding more detailed information to available scenarios in response to user requests, or because of reporting issues identified after the release that need to be corrected. While we did take the utmost care to validate all submitted data, such issues can never be fully avoided.

For this reason, we request that downloads of scenario data are routed through the IAMC 1.5°C Scenario Explorer, unless the data is made available in relation to a specific figure in a publication or online visualization tool, for example as supplementary material to a manuscript published in a scientific journal.

Please refer to the FAQ and legal code for more information.


  • Rogelj, Shindell, Jiang, et al. (2018). Mitigation pathways compatible with 1.5°C in the context of sustainable development. Special Report on the impacts of Global Warming of 1.5 °C. Geneva, Intergovernmental Panel on Climate Change.

  • Smith, Nkem, Calvin, et al. (2019). Interlinkages between Desertification, Land Degradation, Food Security and GHG fluxes: synergies, trade-offs and Integrated Response Options. Special Report on Climate Change and Land. Geneva, Intergovernmental Panel on Climate Change.

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