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Towards an open model intercomparison platform for integrated assessment models scenarios

Author

Listed:
  • Shinichiro Fujimori

    (Kyoto University
    National Institute for Environmental Studies
    International Institute for Applied System Analysis (IIASA))

  • Volker Krey

    (International Institute for Applied System Analysis (IIASA)
    Norwegian University of Science and Technology (NTNU))

  • Keywan Riahi

    (International Institute for Applied System Analysis (IIASA)
    Graz University of Technology)

  • Masahiro Sugiyama

    (University of Tokyo)

  • Tomoko Hasegawa

    (Kyoto University
    National Institute for Environmental Studies
    Ritsumeikan University)

  • James Edmonds

    (Pacific Northwest National Laboratory)

  • Celine Guivarch

    (Centre International de Recherche sur l’Environnement et le Développement (CIRED)
    Ecole des Ponts)

  • Sergey Paltsev

    (Massachusetts Institute of Technology)

  • Steven Rose

    (EPRI)

  • Roberto Schaeffer

    (Universidade Federal do Rio de Janeiro)

  • Massimo Tavoni

    (RFF-CMCC European Institute on Economics and the Environment
    Politecnico di Milano
    Fondazione Centro Euromediterraneo sui Cambiamenti Climatici (CMCC))

  • Saritha Sudharmma Vishwanathan

    (Kyoto University
    Ahmedabad)

  • Detlef Vuuren

    (PBL Netherlands Environmental Assessment Agency)

  • Matthias Weitzel

    (Joint Research Centre (JRC))

Abstract

The majority of scenarios in the IPCC database are generated by integrated assessment models (IAMs) and come from model intercomparison projects. However, the way in which the current model intercomparison projects are organized is not open to all IAM teams worldwide. Here we propose a transparent and inclusive platform that is open to anyone with an IAM regarding protocols development, scenario submissions and results evaluation. We discuss the challenges of this approach, particularly human resources and financial support. We identify diversity in the level of model capability and quality of model output as possibly critical issues. Despite such challenges, the IAM community and its scientific activities can improve and benefit from the proposed platform, ultimately contributing to better climate policymaking.

Suggested Citation

  • Shinichiro Fujimori & Volker Krey & Keywan Riahi & Masahiro Sugiyama & Tomoko Hasegawa & James Edmonds & Celine Guivarch & Sergey Paltsev & Steven Rose & Roberto Schaeffer & Massimo Tavoni & Saritha S, 2025. "Towards an open model intercomparison platform for integrated assessment models scenarios," Nature Climate Change, Nature, vol. 15(11), pages 1156-1164, November.
    • Handle: RePEc:nat:natcli:v:15:y:2025:i:11:d:10.1038_s41558-025-02462-3
    DOI: 10.1038/s41558-025-02462-3
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