Auxiliary Variables

Omega needs to compute a couple of auxiliary variables at every model time step in order to advance the model state. Some auxiliary variables can be computed in different ways, and the user can specify that in the input configuration file. For example, the value of thickness used in advective flux can be centered or upwind.

    Advection:
       FluxThicknessType: 'Center'

Auxiliary variables are also available for output.

The following auxiliary variables are currently available:

Name	Description
KineticEnergyCell	kinetic energy of horizontal velocity on cells
VelocityDivCell	divergence of horizontal velocity
FluxLayerThickEdge	layer thickness used for fluxes through edges. May be centered, upwinded, or a combination of the two
MeanLayerThickEdge	layer thickness averaged from cell center to edges
RelVortVertex	curl of horizontal velocity, defined at vertices
NormRelVortVertex	curl of horizontal velocity divided by layer thickness
NormPlanetVortVertex	earth’s rotational rate (Coriolis parameter, f) divided by layer thickness
NormRelVortEdge	curl of horizontal velocity divided by layer thickness, averaged from vertices to edges
NormPlanetVortEdge	earth’s rotational rate (Coriolis parameter, f) divided by layer thickness, averaged from vertices to edges
VelDel2Edge	laplacian of horizontal velocity on edges
VelDel2DivCell	divergence of laplacian of horizontal velocity on cells
VelDel2RelVortVertex	curl of laplacian of horizontal velocity on cells
HTracersEdge	thickness-weighted tracers used for fluxes through edges. May be centered, upwinded or a combination of the two
Del2TracersCell	laplacian of tracers on cells