Welcome to CCSM

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CCSM Research Tools: CCSM3.0 Public Release

CCSM version 3.0 was released to the public in June 2004. This web page deals specifically with the CCSM3.0 release.

The Community Climate System Model (CCSM) is a coupled climate model for simulating the earth's climate system. Composed of four separate models simultaneously simulating the earth's atmosphere, ocean, land surface and sea-ice, and one central coupler component, the CCSM allows researchers to conduct fundamental research into the earth's past, present and future climate states.

Contents

Model Documentation

Running The Complete Coupled System

Atmosphere Models

Ice Models

Land Models

Ocean Models

Coupler

Model Source Code
  • CCSM3.0 source code (23 June 2004) -- This is the original 3.0 software release.
    This source code is disseminated via the Earth System Grid (ESG). A short registration is required.
    All CCSM3 source code is subject to the following Copyright Notice and Disclaimer.
    The code is a 7.2MB gzip'd tar file. Once un-zip'd and un-tar'd, the source code is about 34MB.
    To unzip, "gunzip ccsm3_0.tar.gz". To untar, "tar -xvf ccsm3_0.tar".

  • CCSM3.0.1 beta14 source code (22 March 2006) -- This is an incremental upgrade to the original release.
    What is ccsm3.0.1 beta14?
    This source code is disseminated via the Earth System Grid (ESG). A short registration is required.
    All CCSM3 source code is subject to the following Copyright Notice and Disclaimer.
    The code is a 7.5MB gzip'd tar file. Once un-zip'd and un-tar'd, the source code is about 30MB.
    To unzip, "gunzip ccsm3_0_1_beta14.tar.gz". To untar, "tar -xvf ccsm3_0_1_beta14.tar".

  • Reporting a Problem
    If you have any problems, additional questions, bug reports, or any other feedback, please use the CCSM Help Bulletin Board .

  • CCSM3.0 Mailing List
    To subscribe to the ccsm-users mailing list follow the link, or email your request to ccsm @ ucar.edu. This is a low-volume mailing list that allows the community to stay up to date with new releases, important bugs, and development procedures.

Model Input Data

The input data needed to run the model is disseminated via the Earth System Grid (ESG).

The data necessary to run these all-active configurations is currently available:

  • non-IPCC constant 1990 control runs
  • non-IPCC increasing CO2 scenarios
  • IPCC constant 1870 control runs

For additional data used in control runs submitted to the Intergovernmental Panel on Climate Change (IPCC), contact your working group liason. Additional input data is necessary for the following IPCC scenarios:

  • IPCC constant 2000 control runs
  • IPCC 20th-century scenarios
  • IPCC future scenarios

Model Output Data

A variety of mmulti-century CCSM3.0 control runs have been carried out at three resolutions: T31_gx3v5, T42_gx1v3, and T85_gx1v3. Monthly average data from all components were saved and some post-processed time series are available. A description of the various CCSM3 control runs is available in the Experiments and Output Data section of this web site.

CCSM3 output data is disseminated via the Earth System Grid (ESG).

CAM/CLM Release Web Pages

CAM3 (Community Atmosphere Model) and CLM (Community Land Model) are also available in "stand-alone" (uncoupled) versions. Information, documentation, and code for these uncoupled models is available at: