The WCRP Working Group on Coupled Modelling (WGCM) oversees the Coupled Model Intercomparison Project, which is now in its 6th phase. Background information about CMIP and its phases can be found on WGCM website as well as on the PCMDI-hosted pages. An introductory overview of CMIP6 is also provided by the WGCM.
Practical information for those interested in participating in CMIP6 is provided in three guides, tailored to different groups: