CCSM/CESM Model Releases
Each release includes the complete collection of component model source code, documentation, and input data. For model output data, see the Experiments and Output Data section of this website.
Users should read the CESM Data Management & Distribution Plan which documents the procedures for the storage and distribution of data associated with the CESM project. [CESM Data Management & Distribution Plan]
|CCSM 4.0||April 2010||Notable improvements|
|CCSM 3.0||June 2004||Notable improvements. Numerous multi-century control runs have been conducted at low, medium, and high resolutions and are available to the general public for examination and analysis.|
|CCSM 2.0.1||October 2002||Provides an incremental improvement over CCSM2.0. A number of minor problems were fixed, forcing datasets were updated, and a lower-resolution paleo version (T31/gx3v4) of the model was included.|
|CCSM 2.0||May 2002||All components have been upgraded. Target architectures were IBM SP, SGI Origin 2000, and Compaq/alpha. A multi-century control run was presented at the annual CCSM Workshop in June, 2002.|
|CCSM 1.4||July 2000||This version introduces further improvements to the code, build procedures, and run scripts. This code distribution will run on Cray machines and SGI Origin 2000 machines.|
|CCSM 1.2||July 1998||This version introduces a choice of two atm/lnd resolutions, T31 and T42, and two ocn/ice resolutions, 3x3 and 2x2 degree. Also, the atm and lnd models are now separate components. This code distribution runs on NCAR Cray machines.|
|CCSM 1.0||June 1996||This was the first public release of the CCSM software. This code and corresponding control runs were presented at the firest CSM Workshop in May 1996.|
The Community Earth System Model (CESM) is a fully-coupled, global climate model that provides state-of-the-art computer simulations of the Earth's past, present, and future climate states.
CESM is sponsored by the National Science Foundation (NSF) and the U.S. Department of Energy (DOE). Administration of the CESM is maintained by the Climate and Global Dynamics Division (CGD) at the National Center for Atmospheric Research (NCAR).
Acquiring the CESM Code
CESM 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 view the latest version 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.
CESM Support Policy
CESM Data Management & Distribution Plan
The Community Earth System Model (CESM) Data Management and Data Distribution Plan documents the procedures for the storage and distribution of data associated with the CESM project.