nh_p_grad

NonHydrostaticPressureGradient

Apply nonhydrostatic pressure gradient force in the horizontal.

Fully implicit with beta = 0.

Documented in Lin 97, Section 6.6 of FV3 documentation.

Fortran name is nh_p_grad.

__call__(u, v, pp, gz, pk3, delp, dt, ptop, akap)

Updates the U and V winds due to pressure gradients, accounting for both the hydrostatic and nonhydrostatic contributions.

Parameters:

Name	Type	Description	Default
u	inout	wind in x-direction	required
v	inout	wind in y-direction	required
pp	inout	pressure, gets updated to B-grid	required
gz	inout	height of the model grid cells, gets updated to B-grid	required
pk3	inout	gets updated to B-grid	required
delp	in	vertical delta in pressure	required
dt	in	model atmospheric timestep	required
ptop	in	pressure at top of atmosphere	required
akap	in	Kappa	required

calc_u(u, wk, wk1, gz, pk3, pp, rdx, dt)

Parameters:

Name	Type	Description	Default
u	inout		required
wk	in		required
wk1	in		required
gz	in		required
pk3	in		required
pp	in		required
rdx	in		required

calc_v(v, wk, wk1, gz, pk3, pp, rdy, dt)

Parameters:

Name	Type	Description	Default
v	inout		required
wk	in		required
wk1	in		required
gz	in		required
pk3	in		required
pp	in		required
rdy	in		required

set_k0_and_calc_wk(pp, pk3, wk, top_value)

Parameters:

Name	Type	Description	Default
pp	inout		required
pk3	inout		required
wk	out	delta (pressure to the kappa) computed on corners	required