Geoscientific Model Development
Geoscientific Model Development
GMD
Articles | Volume 18, issue 23
Articles | Volume 18, issue 23
https://doi.org/10.5194/gmd-18-9897-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-18-9897-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 23
Methods for assessment of models
 | 
10 Dec 2025
Methods for assessment of models |  | 10 Dec 2025

Validation of climate mitigation pathways

Pascal Weigmann, Rahel Mandaroux, Fabrice Lécuyer, Anne Merfort, Tabea Dorndorf, Johanna Hoppe, Jarusch Muessel, Robert Pietzcker, Oliver Richters, Lavinia Baumstark, Elmar Kriegler, Nico Bauer, Falk Benke, Chen Chris Gong, and Gunnar Luderer

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Cited articles

Anderson, K.: Wrong tool for the job: Debating the bedrock of climate-change mitigation scenarios, Nature, 573, 348–348, 2019. a
Baumstark, L., Bauer, N., Benke, F., Bertram, C., Bi, S., Gong, C. C., Dietrich, J. P., Dirnaichner, A., Giannousakis, A., Hilaire, J., Klein, D., Koch, J., Leimbach, M., Levesque, A., Madeddu, S., Malik, A., Merfort, A., Merfort, L., Odenweller, A., Pehl, M., Pietzcker, R. C., Piontek, F., Rauner, S., Rodrigues, R., Rottoli, M., Schreyer, F., Schultes, A., Soergel, B., Soergel, D., Strefler, J., Ueckerdt, F., Kriegler, E., and Luderer, G.: REMIND2.1: transformation and innovation dynamics of the energy-economic system within climate and sustainability limits, Geosci. Model Dev., 14, 6571–6603, https://doi.org/10.5194/gmd-14-6571-2021, 2021. a, b
Beck, S. and Oomen, J.: Imagining the corridor of climate mitigation – What is at stake in IPCC's politics of anticipation?, Environmental Science & Policy, 123, 169–178, 2021. a
Bellona: Norway's Longship CCS project, https://network.bellona.org/content/uploads/sites/3/2020/10/Longship-Briefing_Bellona-1.pdf (last access: 5 December 2025), 2022. a
Bertram, C., Brutschin, E., Drouet, L., Luderer, G., van Ruijven, B., Aleluia Reis, L., Baptista, L. B., de Boer, H.-S., Cui, R., Daioglou, V., Fosse, F., Fragkiadakis, D., Fricko, O., Fujimori, S., Hultman, N., Iyer, G., Keramidas, K., Krey, V., Kriegler, E., Lamboll, R. D., Mandaroux, R., Rochedo, P., Rogelj, J., Schaeffer, R., Silva, D., Tagomori, I., van Vuuren, D., Vrontisi, Z., and Riahi, K.: Feasibility of peak temperature targets in light of institutional constraints, Nature Climate Change, 14, 954–960, 2024. a
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We present the Potsdam Integrated Assessment Modeling validation tool, piamValidation, an open-source R package for validating climate scenarios. The tool enables comparison of model outputs with historical data, feasibility constraints and alternative scenarios. Designed as a community resource, validation configuration files can serve as a knowledge-sharing platform. The main objective is to improve the credibility of Integrated Assessment Models by promoting standardized validation practices.
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