Home | Community Earth System Model

The Community Earth System Model is a fully coupled global climate model developed in collaboration with colleagues in the research community. CESM provides state of the art computer simulations of Earth's past, present, and future climate states.

Learn More

Featured Articles

Jun 12, 2023

2023 CESM Distinguished Award

Julio Bacmeister and Peter Lauritzen have jointly received the 2023 CESM Distinguished Award

Mar 15, 2023

New CESM Science and Strategic Plan for 2023-2028

Sep 29, 2020

New developmental version of the CESM2 family, CESM2.2.0

May 28, 2021

New visualization illustrating the benefits of variable-resolution grids for use in ice sheet research

Community Earth System Model 2 (CESM2)

The latest release in the CESM family including many substantial science and infrastructure improvements since its previous version

What We Offer

Fully coupled numerical simulations of the Earth system consisting of atmospheric, ocean, ice, land surface, carbon cycle, and other components

Models

View the current and past releases for all of the models we offer

Our Events

Information about our workshops, tutorials, and working group meetings

Experiments

Experiments and resulting output data for various CCSM & CESM model release versions

Projects

Staff led CESM projects and diagnostics packages for the Community Earth System Model

Community Projects

CESM projects in collaboration with community members

Publications

A list of publications that used CESM in their research as well as how to acknowledge CESM if used in your publications

Who We Are

The CESM project is supported primarily by the National Science Foundation (NSF). Administration of the CESM is maintained by the Climate and Global Dynamics Laboratory (CGD) at the National Center for Atmospheric Research (NCAR).