Community Earth System Model 2 (CESM2)
The latest release in the CESM family including many substantial science and infrastructure improvements since its previous version
Note: The CESM2.2.z release is not a scientifically supported version; that is, we do not have any long simulations with this model version yet. In most cases, users should continue to use the CESM2.1.z series for their science and especially for CMIP6-related simulations.
Scientific validation consists of a multi-decadal model run of the given component set at the target resolution, followed by scientific review of the model output diagnostics.
* This page now contains links to datasets on ESGF, CDG, glade and NCAR HPSS as well as diagnostic plots and caseroot details.
Listed below are several common use cases with links into the corresponding on-line documentation.
- Running CESM2 on a supported machine using a scientifically supported out-of-the-box configuration
- Creating, setting up and building a CESM2 case
- CESM2 Component Configuration Settings for component namelist and XML input parameters.
- Postprocessing CESM2 output data on NCAR supported machines using parallel python tools
- Verifying the port of CESM2 to a new machine
- Getting help as a registered user of the DiscussCESM Forums
Common Infrastructure for Modeling the Earth contains the coupling infrastructure, support scripts, data models and utility libraries needed to create a single-executable coupled Earth System Model.
* CIME does not contain any prognostics components and is available in a stand-alone package that can be compiled and tested with just its data components.
Model Input Data
As of CESM2, the input data necessary to run all supported component sets is made available from a number of different public repositories including:
Do not attempt to checkout the whole input data repository, it is currently over 20 TB
The CIME User Guide explains how to obtain the subset of input data required for your needs