CESM2 Community Atmosphere Model


Development of the model was led by the Atmosphere Model Working Group (AMWG). Development of the Whole Atmosphere Community Climate Model (WACCM, a capability of CAM) was led by the Whole Atmosphere Working Group (WAWG). Development of CAM-Chem was led by the Chemistry Climate Working Group (CCWG).

Future of CESM Atmosphere Modeling

We are soliciting input on the future of CESM Atmosphere Modeling. We are accepting input through a Google Form.

Please give us your thoughts!


CAM 6.0 notable improvements are detailed in the CESM2 What's New documentation.

CAM6 Tutorial

Lectures on CAM6 and exercises using the CAM6 Single Column Atmosphere Model (SCAM6), are now available from the CAM6 Tutorial.


Version 5.3 of the Community Atmosphere Model (CAM) is the latest in a series of global atmosphere models developed primarily at the National Center for Atmospheric Research (NCAR). The notable improvements for CAM are now detailed with the improvements for all model components in the Release Summary For CESM1.2.0


CAM-6.0 CESM2.0

CAM-5.3 CESM-1.2

CAM-5.1 CESM-1.0.3

  • Scientific description (NCAR Tech. Note TN-486) [PS] [PDF]

CAM-4 CCSM-4.0

  • Scientific description (NCAR Tech. Note TN-485) [PS] [PDF]

Output & Diagnostics

Model output data and diagnostic plots

CAM Post-Processing Utilities

The CAM post-processing utilities are currently provided as a service to the community. The CAM diagnostic package can be accessed from the release code repository [Register Here] Basic documentation is provided on the CAM diagnostic package webpage.

Model and diagnostics support

CAM is fully supported for 1 degree and 2 degree finite volume simulations. Informal community support for all other model configurations and the diagnostic package is provided via the CCSM bulletin board. General questions should be submitted to this bulletin board; however, any bugs found in the model or diagnostic packages should be reported to the AMWG liaison.