At present, the only dynamical model included with the Harvard Ocean Prediction System is a Primitive Equation (PE) model.
The primitive equations are a simplification of the Navier-Stokes equations of fluid motion in a rotating coordinate system. The simplifying assumptions are:
The HOPS PE model is built on the Geophysical Fluid Dynamics Laboratory primitive equation model. Over the years, the HOPS group has added the following functionality to the original GFDL model: