sim1_solver

Sim1Solver

Fortran name is sim1_solver

Namelist

p_fac: Safety factor for minimum nonhydrostatic pressures.

__call__(dt, gamma, cp3, pe, delta_mass, pm, pem, w, dz, potential_temperature, ws)

Semi-Implicit Method solver -- solves a vertically tridiagonal system for sound waves to compute nonhydrostatic terms for vertical velocity and pressure perturbations.

Chapter 7 of the FV3 documentation

Parameters:

Name	Type	Description	Default
dt	in	timestep in seconds of solver	required
gm	in	?? 1 / (1 - cappa)	required
cp3	in	cappa	required
pe	out	full hydrostatic pressure	required
delta_mass	in	mass thickness of atmospheric layer (kg)	required
pm	in	?? ratio of change in layer pressure without condensates	required
pem	in	recomputed pressure using ptop and delp	required
w	inout	vertical velocity	required
dz	inout	vertical delta of atmospheric layer in meters	required
potential_temperature	in	potential temperature	required
ws	in	surface vertical wind (e.g. due to topography)	required

sim1_solver(w, delta_mass, gamma, dz, potential_temperature, pm, pe, pem, ws, cp3, dt, t1g, rdt, p_fac)

Tridiagonal solve for w and dz, handles pressure gradient force and sound waves in the vertical.

Documented in Chapter 7.1 of the FV3 dynamical core documentation.

Parameters:

Name	Type	Description	Default
w	inout		required
delta_mass	in		required
gamma	in		required
dz	inout		required
ptr	in		required
pm	in		required
pe	out	nonhydrostatic perturbation pressure defined on interfaces	required
pem	in		required
ws	in	surface vertical wind (e.g. due to topography)	required
cp3	in		required