CESM Models

CESM1.0 Public Release

About CESM 1.0

The Community Earth System Model (CESM) 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 CESM allows researchers to conduct fundamental research into the earth's past, present and future climate states. CCSM4.0 is a subset of CESM1.0. All CCSM4.0 compsets and resolutions are also found in CESM1.0.z.

Model Output Data and Diagnostics

Model Documentation



External Library Documentation

Model Input Data

The input data necessary to run all supported component sets is made available from a public Subversion input data repository. Note that the inputdata repository has much more data in it than you need to run CESM1.0 ---- DO NOT attempt to svn checkout the whole input data repository. The CESM1.0 User's Guide explains how to obtain the subset of input data required for your needs.

Performance and Load Balancing Data

The CESM1 Timing Table provides performance data for machine hardware and input from the user community.

The CESM1.0.5 Timing Table provides performance data for yellowstone.


CESM Project

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 Laboratory (CGD) at the National Center for Atmospheric Research (NCAR).

Model Source Code

Copyright and Terms of Use

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

Acquiring the Release 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.

Acquistion of the code is more fully described in the most recent version of the CESM1.0 User's Guide.

Version Summaries and Release Notes

The CESM1.0 Release Notes page summarizes all available versions of CESM1.0, along with details of new features, bug fixes, and any known issues identified in each release.

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 CESM Bulletin Board, which is in place to facilitate communication within the CESM community. Finally, please also refer to the Release Notes entries that are provided with every release and release update.

CESM Support Policy

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.