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Computes large-scale condensation and precipitation.
Temperature and specific humidity adjustments are computed in model layers
where the relative humidity exceeds a threshold relative humidity.
The features include:
1) option for the re-evaporation of falling precipitation
2) energetically consistent adjustment with precipitation type
Reference: Manabe, S., (1969). Mon. Wea. Rev. 97, 739-798.
sat_vapor_pres_mod
utilities_mod
constants_mod
use lscale_cond_mod [, only: lscale_cond_init, lscale_cond ]
lscale_cond_init: Must be called before lscale_cond to initialize
the module, namelist, and constants.
lscale_cond: Computes the large-scale condensation adjustments for
temperature and specific humidity, and returns the
mass of rain and snow that reach the ground (in an
energetically consistent way).
call lscale_cond_init ( )
There are no arguments.
----------------------------------------------------
call lscale_cond ( tin, qin, pfull, phalf, coldt,
rain, snow, tdel, qdel, mask, conv )
Input
tin temperature (deg k) at full model levels
[real, dimension(:,:,nlev)]
qin specific humidity of water vapor at full model levels
[real, dimension(:,:,nlev)]
pfull pressure (pascals) at full model levels
[real, dimension(:,:,nlev)]
phalf pressure (pascals) at half (interface) model levels
[real, dimension(:,:,nlev+1)]
coldt should precipitation be snow at this point?
[logical, dimension(:,:)]
Input (optional)
mask optional mask (0 or 1.)
[real, dimension(:,:,nlev)]
conv logical flag; if true then no large-scale adjustment
is performed at that grid-point's level
[real, dimension(:,:,nlev)]
Output
rain liquid precipitation (kg/m2)
[real, dimension(:,:)]
snow frozen precipitation (kg/m2)
[real, dimension(:,:)]
tdel temperature tendency at full model levels
[real, dimension(:,:,nlev)]
qdel specific humidity tendency (of water vapor) at
full model levels
[real, dimension(:,:,nlev)]
&lscale_cond_nml
hc relative humidity at which large scale condensation
occurs, where 0 <= hc <= 1
[real, default: hc=1.]
do_evap flag for the re-evaporation of moisture in
sub-saturated layers below, if do_evap=.true. then
re-evaporation is performed
[logical, default: do_evap=.false.]
Revision history
Prior changes
MPP version created. Minor changes for open_file, error_mesg,
and Fortran write statements. Answers should reproduce the
previous version.
Prior changes
* logical input argument added that specifies whether frozen
precipitation should be computed for the column
(note: the adjustment is now done energetically consistent
for the type of precip)
* output arguments for column integrated rain and snow replace
the argument for total precip
Fatal Error in lscale_cond
lscale_cond_init has not been called
The initialization for this module must be called before
calling routine lscale_cond.
Manabe, S., (1969). Mon. Wea. Rev. 97, 739-798.
None.
None.
Routine lscale_cond_init could be called automatically by the
main routine lscale_cond. This would remove the current fatal error
that would occur.