Classification by Model Characteristics

• Vertical coordinates
  • Z-level
  • Sigma coordinates
  • Isopycnal coordinates
• Horizontal coordinates
  • Rectilinear
  • Curvilinear
    • Orthogonal
    • Non-orthogonal
• Vertical diffusion
  • Local models
    • Constant diffusivity
    • Convective adjustment
    • Richardson number modified diffusivity
    • Turbulence closure
  • Bulk models
    • Bulk mixed layer models
• Horizontal diffusion
  • Null diffusivity
  • Constant diffusivity
  • Smagorinsky diffusivity
  • Biharmonic smoother
  • Filters
• Sea surface treatment
  • Free surface
  • Rigid lid
• Basis functions
  • Local
    • Finite differences
    • Finite elements
    • Finite volume
  • Global
    • Spectral
  • Mixed
    • Spectral element