CESM Models | CESM2

  • Current Release

    The current CESM supported release is CESM 2.0.0

    Learn more

  About CESM2

CESM is a fully-coupled, community, global climate model that provides state-of-the-art computer simulations of the Earth's past, present, and future climate states.

  Scientific Validation

Scientific validation consists of a multi-decadal model run of the given component set at the target resolution, followed by scientific review of the model output diagnostics.

* Please see CESM2 Scientifically Validated Configurations for data download details.

  Quick Start

See the selected links below to help you quickly get started with CESM2

  CIME Documentation

Common Infrastructure for Modeling the Earth contains the coupling infrastructure, support scripts, data models and utility libraries needed to create a single-executable coupled Earth System Model.
* CIME does not contain any prognostics components and is available in a stand-alone package that can be compiled and tested with just its data components.

  Prognostic Components

Each model component page contains descriptions and documentation for active or prognostic models.

  Configurations and Grids

Component configurations include settings required for CIME enabled models; both prognostic and data model components. These settings include:

* Includes Fortran namelists and CASEROOT variable definitions

  External Library Documentation

* Support for these tools is currently limited to NCAR machines only

  Model Input Data

As of CESM2, the input data necessary to run all supported component sets is made available from a number of different public repositories including:


Do not attempt to checkout the whole input data repository, it is currently over 20 TB


The CIME User Guide explains how to obtain the subset of input data required for your needs