Community Earth System Model CESM2

 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.

View the CESM2 release series information to learn more
CESM2 release series information

 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.

* This page now contains links to datasets on ESGF, CDG, glade and NCAR HPSS as well as diagnostic plots and caseroot 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