obs4MIPs (Observations for Model Intercomparisons Project) is an activity to make observational products more accessible for climate model intercomparisons
A wide variety of observationally-based datasets are used for climate model evaluation. obs4MIPs refers to a limited collection of well-established and documented datasets that have been organized according to the 5th Coupled Model Intercomparison Project (CMIP5) model output requirements and made available on the Earth System Grid Federation (ESGF).