This is the Rayleigh friction calculation with total energy conservation. More...

Detailed Description

Role of Rayleigh friction, it attempts to resolve two issues:

The top lid model effects, sponge layer to suppress resolved wave reflections and extra-heating
The winter-summer zonal wind drag in the strato-mesosphere

Argument Table

local_name	standard_name	long_name	units	rank	type	kind	intent	optional
lsidea	flag_idealized_physics	flag for idealized physics	flag	0	logical		in	F
im	horizontal_loop_extent	horizontal loop extent	count	0	integer		in	F
ix	horizontal_dimension	horizontal dimension	count	0	integer		in	F
km	vertical_dimension	number of vertical layers	count	0	integer		in	F
A	tendency_of_y_wind_due_to_model_physics	meridional wind tendency due to model physics	m s-2	2	real	kind_phys	inout	F
B	tendency_of_x_wind_due_to_model_physics	zonal wind tendency due to model physics	m s-2	2	real	kind_phys	inout	F
C	tendency_of_air_temperature_due_to_model_physics	air temperature tendency due to model physics	K s-1	2	real	kind_phys	inout	F
u1	x_wind	zonal wind	m s-1	2	real	kind_phys	in	F
v1	y_wind	meridional wind	m s-1	2	real	kind_phys	in	F
dt	time_step_for_physics	physics time step	s	0	real	kind_phys	in	F
cp	specific_heat_of_dry_air_at_constant_pressure	specific heat of dry air at constant pressure	J kg-1 K-1	0	real	kind_phys	in	F
levr	number_of_vertical_layers_for_radiation_calculations	number of vertical layers for radiation calculations	count	0	integer		in	F
pgr	surface_air_pressure	surface pressure	Pa	1	real	kind_phys	in	F
prsl	air_pressure	mid-layer pressure	Pa	2	real	kind_phys	in	F
prslrd0	pressure_cutoff_for_rayleigh_damping	pressure level above which to apply Rayleigh damping	Pa	0	real	kind_phys	in	F
ral_ts	time_scale_for_rayleigh_damping	time scale for Rayleigh damping	d	0	real	kind_phys	in	F
errmsg	error_message	error message for error handling in CCPP	none	0	character	len=*	out	F
errflg	error_flag	error flag for error handling in CCPP	flag	0	integer		out	F

Functions/Subroutines
subroutine	rayleigh_damp::rayleigh_damp_run ( lsidea, IM, IX, KM, A, B, C, U1, V1, DT, CP, LEVR, pgr, PRSL, PRSLRD0, ral_ts, errmsg, errflg)