SPEEDY is a simplified GCM developed at ICTP by Franco Molteni and Fred Kucharski.
The ICTP AGCM (nicknamed SPEEDY, for "Simplified Parameterizations, privitivE-Equation DYnamics") is based on a spectral dynamical core developed at the Geophysical Fluid Dynamics Laboratory. It is a hydrostatic, s-coordinate, spectral-transform model in the vorticity-divergence form, with semi-implicit treatment of gravity waves.
Typical performance on a Pentium 4 (3.40GHz) processor: 1 year of simulation can be run in 12 min.
For reference, please cite:
Molteni F (2003) Atmospheric simulations using a GCM with simplified physical parametrizations. I. Model climatology and variability in multi-decadal experiments. Clim Dyn 20: 175-191
Kucharski F, Molteni F, and Bracco A (2006) Decadal interactions between the western tropical Pacific and the North Atlantic Oscillation. Clim Dyn 26: 79-91
For downloading SPEEDY, please contact: firstname.lastname@example.org (Fred Kucharski)