xtp_u

advect_u_along_x(u, ub_contra, rdx, dx, dxa, dt)

Advect covariant x-wind on D-grid using contravariant x-wind on cell corners.

Named xtp_u in the original Fortran code. In the Fortran, dt is folded in to ub_contra and called "courant".

Parameters:

Name	Type	Description	Default
u	FloatField	covariant x-wind on D-grid	required
ub_contra	FloatField	contravariant x-wind on cell corners	required
rdx	FloatFieldIJ	1 / dx	required
dx	FloatFieldIJ	gridcell spacing in x-direction	required
dxa	FloatFieldIJ	a-grid gridcell spacing in x-direction	required
dt	Float	timestep in seconds	required

Returns:

Name	Type	Description
updated_u		u having been advected by u_on_cell_corners

get_bl_br(u, dx, dxa)

Parameters:

Name	Type	Description	Default
u		covariant x-wind on D-grid	required
dx		gridcell spacing in x-direction	required
dxa		gridcell spacing in x-direction on A-grid	required

Returns:

Name	Type	Description
bl		???
br		???