Articles | Volume 19, issue 15
https://doi.org/10.5194/gmd-19-7111-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-19-7111-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Model experiment description paper
| 
03 Aug 2026
Model experiment description paper |
| 03 Aug 2026
| 03 Aug 2026
Reduced Complexity Model Intercomparison Project phase 3: experimental protocol for coordinated constraining and evaluation of reduced-complexity models
Alejandro Romero-Prieto
CORRESPONDING AUTHOR
School of Earth and Environment, University of Leeds, Leeds, United Kingdom
Priestley Centre for Climate Futures, University of Leeds, Leeds, United Kingdom
Met Office Hadley Centre, Exeter, United Kingdom
Marit Sandstad
CICERO Center for International Climate Research, Oslo, Norway
Benjamin M. Sanderson
CICERO Center for International Climate Research, Oslo, Norway
Zebedee R. J. Nicholls
Energy, Climate and Environment Program, International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria
Climate Resource, Berlin, Germany
Climate & Energy College, School of Geography, Earth and Atmospheric Sciences, The University of Melbourne, Parkville, VIC, Australia
Norman J. Steinert
CICERO Center for International Climate Research, Oslo, Norway
Thomas Gasser
Energy, Climate and Environment Program, International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria
Laboratoire des Sciences du Climat et de l'Environnement (LSCE), CNRS, CEA, UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France
Camilla Mathison
Met Office Hadley Centre, Exeter, United Kingdom
School of Geography, University of Leeds, Leeds, United Kingdom
Jarmo Kikstra
Energy, Climate and Environment Program, International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria
Thomas J. Aubry
Department of Earth Sciences, University of Oxford, Oxford, United Kingdom
Department of Earth and Environmental Sciences, University of Exeter, Penryn, United Kingdom
Katsumasa Tanaka
Laboratoire des Sciences du Climat et de l'Environnement (LSCE), CNRS, CEA, UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France
Earth System Division, National Institute for Environmental Studies (NIES), Tsukuba, Japan
Konstantin Weber
Institute for Atmospheric and Climate Science, Department of Environmental Systems Science, ETH Zürich, Zurich, Switzerland
Chris Smith
Energy, Climate and Environment Program, International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria
Data sets
RCMIP phase 3 protocol Alejandro Romero Prieto et al. https://doi.org/10.5281/zenodo.20720521
Model code and software
Pyrcmip tool archive Alejandro Romero Prieto et al. https://doi.org/10.5281/zenodo.20308242
Short summary
Reduced-complexity models are an important tool in climate science, helping us understand and estimate future climate change. We present the experimental protocol for the next phase of the reduced-complexity model intercomparison project, which aims to compare results from many such models to better understand their behaviour. This knowledge will guide how these models are developed and used in the future, including in the upcoming Intergovernmental Panel on Climate Change (IPCC) assessment report (AR7).
Reduced-complexity models are an important tool in climate science, helping us understand and...
