GFS gscond Main

This subroutine computes grid-scale condensation and evaporation of cloud condensate. More...

Detailed Description

Argument Table

local_name	standard_name	long_name	units	rank	type	kind	intent	optional
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	vertical layer dimension	count	0	integer		in	F
dt	time_step_for_physics	physics time step	s	0	real	kind_phys	in	F
dtf	time_step_for_dynamics	dynamics time step	s	0	real	kind_phys	in	F
prsl	air_pressure	layer mean air pressure	Pa	2	real	kind_phys	in	F
ps	surface_air_pressure	surface pressure	Pa	1	real	kind_phys	in	F
q	water_vapor_specific_humidity_updated_by_physics	water vapor specific humidity	kg kg-1	2	real	kind_phys	inout	F
clw1	cloud_ice_mixing_ratio	moist cloud ice mixing ratio	kg kg-1	2	real	kind_phys	in	F
clw2	cloud_liquid_water_mixing_ratio	moist cloud water mixing ratio	kg kg-1	2	real	kind_phys	in	F
cwm	cloud_condensed_water_mixing_ratio_updated_by_physics	moist cloud condensed water mixing ratio	kg kg-1	2	real	kind_phys	out	F
t	air_temperature_updated_by_physics	layer mean air temperature	K	2	real	kind_phys	inout	F
tp	air_temperature_two_time_steps_back	air temperature two time steps back	K	2	real	kind_phys	inout	F
qp	water_vapor_specific_humidity_two_time_steps_back	water vapor specific humidity two time steps back	kg kg-1	2	real	kind_phys	inout	F
psp	surface_air_pressure_two_time_steps_back	surface air pressure two time steps back	Pa	1	real	kind_phys	inout	F
tp1	air_temperature_at_previous_time_step	air temperature at previous time step	K	2	real	kind_phys	inout	F
qp1	water_vapor_specific_humidity_at_previous_time_step	water vapor specific humidity at previous time step	kg kg-1	2	real	kind_phys	inout	F
psp1	surface_air_pressure_at_previous_time_step	surface air surface pressure at previous time step	Pa	1	real	kind_phys	inout	F
u	critical_relative_humidity	critical relative humidity	frac	2	real	kind_phys	in	F
lprnt	flag_print	flag for printing diagnostics to output	flag	0	logical		in	F
ipr	horizontal_index_of_printed_column	horizontal index of printed column	index	0	integer		in	F
errmsg	ccpp_error_message	error message for error handling in CCPP	none	0	character	len=*	out	F
errflg	ccpp_error_flag	error flag for error handling in CCPP	flag	0	integer		out	F

GFS gscond Scheme General Algorithm

1. Calculate ice-water identification number \(IW\) in order to make a distinction between cloud water and cloud ice (table2 of Zhao and Carr (1997) [111]).
2. Calculate the changes in \(t\), \(q\) and \(p\) due to all the processes except microphysics.
3. Calculate cloud evaporation rate ( \(E_c\), eq. 19 of Zhao and Carr (1997)[111]).
4. Calculate cloud condensation rate ( \(C_g\), eq.8 of Zhao and Carr (1997)[111]).
5. Update \(t\), \(q\), \(cwm\) due to cloud evaporation and condensation processes.

GFS gscond Scheme Detailed Algorithm

Functions/Subroutines
subroutine	zhaocarr_gscond::zhaocarr_gscond_run (im, ix, km, dt, dtf, prsl, ps, q, clw1, clw2, cwm, t, tp, qp, psp , tp1, qp1, psp1, u, lprnt, ipr, errmsg, errflg)