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