CESM Models

CCSM4 Driver/Coupler


The CCSM4 Version of the Community Climate System Model has some significant changes compared to previous versions. In particular, CCSM4 is NOT run via multiple executables concurrently. There is now a top level driver and components are called via standard init, run, and finalize methods. Components can be run sequentially, concurrently, or in some mixed sequential/concurrent layout. A coupler component that runs on a subset of the total processors still exists in the system, and it carries out mapping (interpolation), merging, diagnostics, and other calculations. The name cpl7 refers to both the driver and coupler functionality in the CCSM4 system.



Model Source Code

Copyright and Terms of Use

All CCSM source code is subject to the following Copyright Notice and Disclaimer.

Acquiring the Code

CCSM source code is distributed through a public Subversion code repository. This code can be checked out using Subversion client software, such as the command tool svn, or simply viewed with a web browser.

A short registration is required to access the repository. After registering, you will receive an email containing a user name and password that is necessary to gain access to the repository.

Acquistion of the code is more fully described in the CCSM4.0 User's Guide.

Version Summaries and Known Problems

The following table lists the available versions of code along with their test record and any known problems in the code.

Reporting a Problem

If you have any problems, please first read the User's Guide including the sections on FAQs and Use Cases. Please also refer to the CCSM Bulletin Board, which is in place to facilitate communication within the CCSM community. Finally, please also refer to the Known Problems entries that are provided with every release and release update. If questions or problems still exist, then please send an email to ccsm4-help@cgd.ucar.edu. Support questions will be answered as resources are available.