The Fast Ocean Atmosphere Model

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Image made by Johan Kellum with Vis5D


FOAM is a fully coupled, mixed-resolution, general circulation model designed for high-throughput (simulated years per day) while still providing a good simulated mean climate and simulated variability.

FOAM uses the combination of a low resolution (R15) atmosphere model, a highly efficient medium-resolution ocean model, and distributed memory parallel processing to achieve high throughput on relatively modest numbers of processors (16-64).  The quality of the simulated climate compares well with higher resolution models.  No flux corrections are used.

FOAM's intended purpose is to study long-term natural variability in the climate system. FOAM is also well suited for paleoclimate applications.

FOAM runs on Linux clusters and on parallel supercomputers such as the IBM SP and Cray XT.

For more information, email  Robert Jacob at

FOAM development partners:

Mathematics and Computer Science Division                       Climate Systems Center&                          Center for Climatic Research