Identifying and modeling the physical, chemical, biological, and human components that govern the climate system; quantify the certainties and uncertainties in Earth-system feedbacks on timescales up to centuries and longer.

Reliable information on expected climate conditions and impacts is needed to better inform societal decisions.


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


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

What We Do

Enabling the CESM community to conduct competitive climate research on a full range of computing platforms, through specific software developments and by hosting visitors and training tutorials


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

Community Projects

CESM projects in collaboration with community members

Our Events

Information about our workshops, tutorials, and working group meetings