Lateral Parameterizations

The following sub-grid scale parameterizations generally yield fluxes that act in the lateral direction.

Lateral viscosity

Laplacian and bi-harmonic viscosities with linear and Smagorinsky options are implemented in MOM_hor_visc.

Gent-McWilliams/TEM/isopycnal height diffusion

Lagrangian mean eddy mass transport is parameterized following [5], in MOM_thickness_diffuse.

The diffusivity coefficients are calculated in MOM_lateral_mixing_coeffs and MOM_thickness_diffuse and includes constants and the [18] scaling.

A model of sub-grid scale Mesoscale Eddy Kinetic Energy (MEKE) is implement in MOM_MEKE and the associated diffusivity added in MOM_thickness_diffuse. See [12] and [13].

Backscatter

  • A parameterization of the upscale unresolved cascade that utilizes MOM_MEKE and negative Laplacian viscosity is available in MOM_hor_visc. For details see [11, 19]

  • The 2D biharmonic Leith+E backscatter scheme is also available via MOM_hor_visc. For details see [8].

  • The Stochastic GM+E backscatter scheme is also available via MOM_stochastics. For details see [7]

Mixed layer restratification by sub-mesoscale eddies

Mixed layer restratification from [4] and [3] is implemented in MOM_mixed_layer_restrat, which now also contains the mixed layer restratication comes from [2].

Interface filtering

For layer mode, one can filter the interface thicknesses:

Lateral diffusion

See Horizontal Diffusion.

See also The resolution function

Tidal forcing

Astronomical tidal forcings and self-attraction and loading are implement in

The Love numbers are stored internally in MOM_load_love_numbers:

while the self attraction and loading is computed in MOM_self_attr_load:

The self attraction and loading needs spherical harmonics, computed in MOM_spherical_harmonics:

Tides can also be added via an open boundary tidal specification, see OBC wiki page.