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land_readparms.F
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land_readparms.F
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C $Header: /u/gcmpack/MITgcm/pkg/land/land_readparms.F,v 1.14 2014/05/28 21:59:32 jmc Exp $
C $Name: $
#include "LAND_OPTIONS.h"
CBOP
C !ROUTINE: LAND_READPARMS
C !INTERFACE:
SUBROUTINE LAND_READPARMS( myThid )
C !DESCRIPTION: \bv
C *==========================================================*
C | S/R LAND_READPARMS
C | o Read Land package parameters from parameter
C | file "data.land"
C *==========================================================*
C \ev
C !USES:
IMPLICIT NONE
C == Global variables ===
C-- size for MITgcm & Land package :
#include "LAND_SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"
#include "LAND_PARAMS.h"
#ifdef ALLOW_MNC
# include "MNC_PARAMS.h"
#endif
C !INPUT/OUTPUT PARAMETERS:
C myThid :: my Thread Id number
INTEGER myThid
#ifdef ALLOW_LAND
C !LOCAL VARIABLES:
C msgBuf :: Informational/error message buffer
C iUnit :: Work variable for IO unit number
C k :: loop counter
CHARACTER*(MAX_LEN_MBUF) msgBuf
INTEGER iUnit, k
_RL tmpvar
CEOP
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----|
C-- Land model parameters:
C land_calc_grT :: step forward ground Temperature
C land_calc_grW :: step forward soil moiture
C land_impl_grT :: solve ground Temperature implicitly
C land_calc_snow :: step forward snow thickness
C land_calc_alb :: compute albedo of snow over land
C land_oldPickup :: restart from an old pickup (= before checkpoint 52j)
C land_grT_iniFile :: File containing initial ground Temp.
C land_grW_iniFile :: File containing initial ground Water.
C land_snow_iniFile :: File containing initial snow thickness.
C land_deltaT :: land model time-step
C land_taveFreq :: Frequency^-1 for time-Aver. output (s)
C land_diagFreq :: Frequency^-1 for diagnostic output (s)
C land_monFreq :: Frequency^-1 for monitor output (s)
C land_dzF :: layer thickness
NAMELIST /LAND_MODEL_PAR/
& land_calc_grT, land_calc_grW,
& land_impl_grT, land_calc_snow,
& land_calc_alb, land_oldPickup,
& land_grT_iniFile, land_grW_iniFile, land_snow_iniFile,
& land_deltaT, land_taveFreq, land_diagFreq, land_monFreq,
& land_dzF,
& land_timeave_mnc, land_snapshot_mnc, land_mon_mnc,
& land_pickup_write_mnc, land_pickup_read_mnc
C-- Physical constants :
C land_grdLambda :: Thermal conductivity of the ground
C land_heatCs :: Heat capacity of dry soil (J/m3/K)
C land_CpWater :: Heat capacity of water (J/kg/K)
C land_wTauDiff :: soil moisture diffusion time scale
C land_waterCap :: field capacity per meter of soil
C land_fractRunOff:: fraction of water in excess which run-off
C land_rhoLiqW :: density of liquid water (kg/m3)
C land_rhoSnow :: density of snow (kg/m3)
C land_Lfreez :: Latent heat of freezing (J/kg)
C land_hMaxSnow :: Maximum snow-thickness (m)
C diffKsnow :: thermal conductivity of snow (W/m/K)
C timeSnowAge :: snow aging time scale (s)
C hNewSnowAge :: new snow thickness that refresh the snow-age (by 1/e)
C albColdSnow :: albedo of cold (=dry) new snow (Tsfc < -10)
C albWarmSnow :: albedo of warm (=wet) new snow (Tsfc = 0)
C albOldSnow :: albedo of old snow (snowAge > 35.d)
C hAlbSnow :: snow thickness for albedo transition: snow/ground
NAMELIST /LAND_PHYS_PAR/
& land_grdLambda, land_heatCs, land_CpWater,
& land_wTauDiff, land_waterCap, land_fractRunOff,
& land_rhoLiqW,
& land_rhoSnow, land_Lfreez,
& land_hMaxSnow, diffKsnow, timeSnowAge, hNewSnowAge,
& albColdSnow, albWarmSnow, tempSnowAlbL, albOldSnow, hAlbSnow
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----|
IF ( .NOT.useLand ) THEN
C- pkg LAND is not used
_BEGIN_MASTER(myThid)
C- Track pkg activation status:
C print a (weak) warning if data.land is found
CALL PACKAGES_UNUSED_MSG( 'useLand', ' ', ' ' )
_END_MASTER(myThid)
RETURN
ENDIF
_BEGIN_MASTER(myThid)
C- Set default value:
land_calc_grT = .TRUE.
land_calc_grW = .TRUE.
land_impl_grT = .TRUE.
land_calc_snow= .TRUE.
land_calc_alb = .TRUE.
land_oldPickup= .FALSE.
land_grT_iniFile = ' '
land_grW_iniFile = ' '
land_snow_iniFile= ' '
land_deltaT = deltaTclock
land_taveFreq = taveFreq
land_diagFreq = dumpFreq
land_monFreq = monitorFreq
#ifdef ALLOW_MNC
land_timeave_mnc = timeave_mnc .AND. useMNC
land_snapshot_mnc = snapshot_mnc .AND. useMNC
land_mon_mnc = monitor_mnc .AND. useMNC
land_pickup_write_mnc = pickup_write_mnc .AND. useMNC
land_pickup_read_mnc = pickup_read_mnc .AND. useMNC
#else
land_timeave_mnc = .FALSE.
land_snapshot_mnc = .FALSE.
land_mon_mnc = .FALSE.
land_pickup_write_mnc = .FALSE.
land_pickup_read_mnc = .FALSE.
#endif
land_grdLambda= 0.42 _d 0
land_heatCs = 1.13 _d 6
land_CpWater = 4.2 _d 3
c land_CpWater = HeatCapacity_Cp
land_wTauDiff = 48. _d 0*3600. _d 0
land_waterCap = 0.24 _d 0
land_fractRunOff = 0.5 _d 0
land_rhoLiqW = rhoConstFresh
C- snow parameters:
land_rhoSnow = 330. _d 0
land_Lfreez = 334. _d 3
land_hMaxSnow = 1. _d 3
diffKsnow = 0.30 _d 0
timeSnowAge = 50. _d 0 * 86400. _d 0
hNewSnowAge = 2. _d -3
albColdSnow = 0.85 _d 0
albWarmSnow = 0.70 _d 0
tempSnowAlbL = -10. _d 0
albOldSnow = 0.55 _d 0
hAlbSnow = 0.30 _d 0
C- layer thickness:
DO k=1,land_nLev
land_dzF(k) = -1.
land_rec_dzC(k) = -1.
ENDDO
WRITE(msgBuf,'(A)') ' LAND_READPARMS: opening data.land'
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,
I SQUEEZE_RIGHT, myThid )
CALL OPEN_COPY_DATA_FILE( 'data.land', 'LAND_READPARMS',
O iUnit, myThid )
C-- Read parameters from open data file:
C- Parameters for Land model:
READ(UNIT=iUnit,NML=LAND_MODEL_PAR)
C- Physical Constants for Land package
READ(UNIT=iUnit,NML=LAND_PHYS_PAR)
WRITE(msgBuf,'(A)')
& ' LAND_READPARMS: finished reading data.land'
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,
I SQUEEZE_RIGHT, myThid )
C-- Close the open data file
CLOSE(iUnit)
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----|
C-- Derive other parameters:
land_impl_grT = land_calc_grT .AND. land_impl_grT
tmpvar = 0. _d 0
DO k=1,land_nLev
tmpvar = tmpvar+land_dzF(k)
IF (tmpvar.GT.0. _d 0) land_rec_dzC(k) = 2. _d 0 / tmpvar
tmpvar = land_dzF(k)
ENDDO
IF ( land_Lfreez.NE. 0. _d 0 ) THEN
recip_Lfreez = 1. _d 0 / land_Lfreez
ELSE
recip_Lfreez = 0. _d 0
ENDIF
#ifdef ALLOW_MNC
land_timeave_mnc = useMNC .AND. land_timeave_mnc
land_snapshot_mnc = useMNC .AND. land_snapshot_mnc
land_mon_mnc = useMNC .AND. land_mon_mnc
land_pickup_write_mnc = useMNC .AND. land_pickup_write_mnc
land_pickup_read_mnc = useMNC .AND. land_pickup_read_mnc
land_timeave_mdsio = (.NOT.land_timeave_mnc)
& .OR. outputTypesInclusive
land_snapshot_mdsio = (.NOT.land_snapshot_mnc)
& .OR. outputTypesInclusive
land_mon_stdio = (.NOT.land_mon_mnc)
& .OR. outputTypesInclusive
land_pickup_write_mdsio = (.NOT.land_pickup_write_mnc)
& .OR. outputTypesInclusive
#else
land_timeave_mnc = .FALSE.
land_snapshot_mnc = .FALSE.
land_mon_mnc = .FALSE.
land_pickup_write_mnc = .FALSE.
land_pickup_read_mnc = .FALSE.
land_timeave_mdsio = .TRUE.
land_snapshot_mdsio = .TRUE.
land_mon_stdio = .TRUE.
land_pickup_write_mdsio = .TRUE.
#endif
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----|
_END_MASTER(myThid)
C-- Everyone else must wait for the parameters to be loaded
_BARRIER
#endif /* ALLOW_LAND */
RETURN
END