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CCSM Coupled 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.

Version	Release	Description
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.

 

Related Stand-Alone Components: Uncoupled Models

Version	Description
Atmosphere [CAM]	The Community Atmosphere Model (CAM) is the latest in a series of global atmosphere models developed at NCAR for the weather and climate research communities. While a version CAM serves as an atmospheric component in the CCSM framework (a coupled system), this is an alternate version that runs as a "stand alone" (uncoupled) model.
Sea Ice [CSIM]	The Community Sea Ice Model (CSIM) serves as the sea ice component of CCSM. It is the result of a community effort to develop a portable, efficient sea ice model that can be run coupled in a global climate model or uncoupled as a stand-alone ice model. It is a dynamic-thermodynamic model that includes a subgrid-scale ice thickness distribution, energy conserving thermodynamics, and elastic-viscous-plastic (EVP) dynamics.
Land [CLM]	The Community Land Model (CLM) is a state-of-the-art soil-vegetation-atmosphere transfer model developed by the CCSM's Land Model Working Group. Given land surface and atmospheric inputs from datasets and models, the CLM calculates (at the land-atmosphere interface) heat and radiation fluxes, temperature, humidity, and moisture values, river flow, volatile organic compound emissions, and CO2 fluxes. The CLM includes a dynamic global vegetation model that simulates plant structure and distribution as a function of the climate.
Ocean [POP]	The CCSM version of the Parallel Ocean Program was released in June 2004 as part of the CCSM3.0 release.