What is the CCSM?

The Community Climate System Model (CCSM) is a community-wide effort led by the National Center for Atmospheric Research (NCAR) and is a key component of the National Science Foundation program on Climate Modeling, Analysis and Prediction. Composed of four separate models simultaneously simulating the earth's atmosphere, ocean, land surface and sea-ice, and one central coupler component, the CCSM allows researchers to conduct fundamental research into the earth's past, present and future climate states. CCSM 3.0 was released in 2004. The CCSM project played a major role in the IPCC AR4 through the completion and analysis of an extensive series of emission scenario experiments. A subset of CCSM model runs is available through this portal.