An evolving Coupled Model Intercomparison Project phase 7 (CMIP7) and Fast Track in support of future climate assessment

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/111359 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/111359 http://eprints.org/relation/issmallThumbnailVersionOf https://pure.iiasa.ac.at/id/document/111359 archive 353 disk0/00/02/09/19 2025-10-13 08:21:35 2025-10-13 08:21:35 2025-10-13 08:21:35 article show Dunne J.P. Hewitt H.T. Arblaster J.M. Bonou F. Boucher O. Cavazos T. Dingley B. Durack P.J. Hassler B. Juckes M. Miyakawa T. Mizielinski M. Naik V. Nicholls Z. 2343 0000-0002-4767-2723 O'Rourke E. Pincus R. Sanderson B.M. Simpson I.R. Taylor K.E. An evolving Coupled Model Intercomparison Project phase 7 (CMIP7) and Fast Track in support of future climate assessment pub ECE IACC The Coupled Model Intercomparison Project (CMIP) coordinates community-based efforts to answer key and timely climate science questions, facilitate delivery of relevant multi-model simulations through shared infrastructure, and support national and international climate assessments. Generations of CMIP have evolved through extensive community engagement from punctuated phasing into more continuous support for the design of experimental protocols, infrastructure for data publication and access, and public delivery of climate information. We identify four fundamental research questions motivating a seventh phase of coupled model intercomparison relating to patterns of sea surface temperature change, changing weather, the water–carbon–climate nexus, and tipping points. Key CMIP7 advances include an expansion of baseline experiments, a focus on CO2-emissions-driven experiments, sustained support for community MIPs, periodic updating of historical forcings and diagnostics requests, and a collection of prioritized experiments, or the “Assessment Fast Track”, drawn from community MIPs to support climate research, assessment, and service goals across prediction and projection, characterization, attribution, and process understanding. 2025-10-01 published European Geosciences Union (EGU) ; Copernicus doi:10.5194/gmd-18-6671-2025 3377 public Geoscientific Model Development 18 19 6671-6700 30 TRUE 1991-9603 Earth system models for the future (ESM2025, H2020 101003536) yes info:eu-repo/grantAgreement/EC/H2020/101003536/EU//ESM2025 info:eu-repo/semantics/article info:eu-repo/semantics/openAccess