Numerical Modeling: Model Description
POLCOMS model (brief overview)
POLCOMS is Proudman Oceanographic Laboratory COmmunity Modeling System (Holt and James, 2001; http://www.pol.ac.uk/home/research/polcoms/).
Basic features:
 Spherical polar coordinates, Arakawa Bgrid
 Incompressible, hydrostatic, Boussinesq equations of motion
 Time splitting between baroclinic and barotropic components
 Transport equations for temperature and salinity
 Pressuredependent equation of state for sea water
 MelorYamadaGalperin level 2.5 turbulence closure scheme
 Vertical convection adjustment
Specific features:
 `Piecewise Parabolic Method' (PPM, Colella and Woodward, 1984) advection scheme
 scoordinates (Song and Heidvogel, 1996) in vertical direction
 Pressure gradient calculations are made by interpolation onto horizontal planes
 Horizontal viscosity may be set to zero
Fig. 11 
Experimental Set up
