model/src/ini_parms.F

C $Header: /u/gcmpack/MITgcm/model/src/ini_parms.F,v 1.95 2003/04/17 13:16:23 jmc Exp $
C $Name:  $

#include "CPP_OPTIONS.h"

CBOP
C     !ROUTINE: INI_PARMS
C     !INTERFACE:
      SUBROUTINE INI_PARMS( myThid )
C     !DESCRIPTION: \bv
C     *==========================================================*
C     | SUBROUTINE INI_PARMS                                      
C     | o Routine to set model "parameters"                       
C     *==========================================================*
C     | Notes:                                                    
C     | ======                                                    
C     | The present version of this routine is a place-holder.    
C     | A production version needs to handle parameters from an   
C     | external file and possibly reading in some initial field  
C     | values.                                                   
C     *==========================================================*
C     \ev

C     !USES:
      IMPLICIT NONE
C     === Global variables ===
#include "SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"
#include "GRID.h"
#include "EOS.h"

C     !INPUT/OUTPUT PARAMETERS:
C     === Routine arguments ===
C     myThid - Number of this instance of INI_PARMS
      INTEGER myThid

C     !LOCAL VARIABLES:
C     === Local variables ===
C     dxSpacing, dySpacing - Default spacing in X and Y.
C                            Units are that of coordinate system
C                            i.e. cartesian => metres
C                                  s. polar => degrees
C     tmp4delX,tmp8delX - temporary arrays to read in delX
C     tmp4delY,tmp8delY - temporary arrays to read in delY
C     goptCount - Used to count the nuber of grid options
C                 (only one is allowed! )
C     msgBuf    - Informational/error meesage buffer
C     errIO     - IO error flag
C     iUnit - Work variable for IO unit number
C     record - Work variable for IO buffer
C     K, I, J - Loop counters
C     xxxDefault - Default value for variable xxx
      _RL  dxSpacing
      _RL  dySpacing
      REAL*4 tmp4delX(Nx), tmp4delY(Ny)
      REAL*8 tmp8delX(Nx), tmp8delY(Ny)
      CHARACTER*(MAX_LEN_FNAM) delXfile
      CHARACTER*(MAX_LEN_FNAM) delYfile
      CHARACTER*(MAX_LEN_MBUF) msgBuf
      CHARACTER*(MAX_LEN_PREC) record
      INTEGER goptCount
      INTEGER K, i, j, IL, iUnit
      INTEGER errIO
      INTEGER  IFNBLNK
      EXTERNAL IFNBLNK
      INTEGER  ILNBLNK
      EXTERNAL ILNBLNK
C     Default values for variables which have vertical coordinate system
C     dependency.
      _RL viscArDefault
      _RL diffKrTDefault
      _RL diffKrSDefault
      _RL hFacMinDrDefault
      _RL delRDefault(Nr)
      _RS rkFacDefault
C     zCoordInputData :: Variables used to select between different coordinate systems.
C     pCoordInputData :: The vertical coordinate system in the rest of the model is 
C     rCoordInputData :: written in terms of r. In the model "data" file input data can
C     coordsSet       :: be interms of z, p or r.
C                     :: e.g. delZ or delP or delR for the vertical grid spacing.
C                     :: The following rules apply:
C                     :: All parameters must use the same vertical coordinate system.
C                     ::  e.g. delZ and viscAz is legal but
C                     ::       delZ and viscAr is an error.
C                     :: Similarly specifyinh delZ and delP is an error.
C                     :: zCoord..., pCoord..., rCoord... are used to flag when z, p or r are
C                     :: used. coordsSet counts how many vertical coordinate systems have been
C                        used to specify variables. coordsSet > 1 is an error.
C
      LOGICAL zCoordInputData
      LOGICAL pCoordInputData
      LOGICAL rCoordInputData
      INTEGER coordsSet

C     Retired main data file parameters. Kept here to trap use of old data files.
C     zonal_filt_lat  - Moved to package "zonal_filt"
C     nRetired :: Counter used to trap gracefully namelists containing "retired" 
C              :: parameters. These are parameters that are either no-longer used
C                 or that have moved to a different input file and/or namelist.
      _RL zonal_filt_lat
      INTEGER nRetired
CEOP

C--   Continuous equation parameters
      NAMELIST /PARM01/
     & gravitySign,
     & gravity, gBaro, rhonil, tAlpha, sBeta, 
     & f0, beta, omega, rotationPeriod,
     & viscAh,  viscAz,  viscA4, cosPower, viscAstrain, viscAtension,
     & diffKhT, diffKzT, diffK4T, 
     & diffKhS, diffKzS, diffK4S,
     & tRef, sRef, eosType, integr_GeoPot, selectFindRoSurf,
     & atm_Cp, atm_Rd,
     & no_slip_sides,no_slip_bottom,
     & momViscosity,  momAdvection, momForcing, useCoriolis,
     & momPressureForcing, metricTerms, vectorInvariantMomentum,
     & tempDiffusion, tempAdvection, tempForcing,
     & saltDiffusion, saltAdvection, saltForcing,
     & implicSurfPress, implicDiv2DFlow,
     & implicitFreeSurface, rigidLid, freeSurfFac, hFacMin, hFacMinDz,
     & exactConserv,uniformLin_PhiSurf,nonlinFreeSurf,hFacInf,hFacSup,
     & select_rStar,
     & staggerTimeStep,
     & tempStepping, saltStepping, momStepping, tr1Stepping,
     & implicitDiffusion, implicitViscosity,
     & viscAr, diffKrT, diffKrS, hFacMinDr,
     & viscAp, diffKpT, diffKpS, hFacMinDp,
     & rhoConst, rhoConstFresh, buoyancyRelation, HeatCapacity_Cp,
     & writeBinaryPrec, readBinaryPrec, writeStatePrec,
     & nonHydrostatic, quasiHydrostatic, globalFiles, useSingleCpuIO,
     & allowFreezing, ivdc_kappa,
     & bottomDragLinear,bottomDragQuadratic,
     & usePickupBeforeC35, debugMode, 
     & readPickupWithTracer, writePickupWithTracer,
     & tempAdvScheme, saltAdvScheme, tracerAdvScheme,
     & multiDimAdvection, useEnergyConservingCoriolis,
     & useCDscheme, useJamartWetPoints, useNHMTerms,
     & useRealFreshWaterFlux, convertFW2Salt,
     & temp_EvPrRn, salt_EvPrRn, trac_EvPrRn,
     & zonal_filt_lat

C--   Elliptic solver parameters
      NAMELIST /PARM02/
     & cg2dMaxIters, cg2dChkResFreq, cg2dTargetResidual, 
     & cg2dTargetResWunit, cg2dpcOffDFac,
     & cg3dMaxIters, cg3dChkResFreq, cg3dTargetResidual

C--   Time stepping parammeters
      NAMELIST /PARM03/
     & nIter0, nTimeSteps, nEndIter, pickupSuff,
     & deltaT, deltaTmom, deltaTtracer, deltaTfreesurf,
     & forcing_In_AB, abEps, tauCD, rCD,
     & startTime, endTime, chkPtFreq,
     & dumpFreq, taveFreq, tave_lastIter, deltaTClock, diagFreq,
     & monitorFreq, pChkPtFreq, cAdjFreq, 
     & tauThetaClimRelax, tauSaltClimRelax, tauTr1ClimRelax,
     & periodicExternalForcing, externForcingPeriod, externForcingCycle

C--   Gridding parameters
      NAMELIST /PARM04/
     & usingCartesianGrid, dxSpacing, dySpacing, delX, delY, delZ,
     & usingSphericalPolarGrid, phiMin, thetaMin, rSphere,
     & usingCurvilinearGrid,
     & delP, delR, rkFac, Ro_SeaLevel, groundAtK1, delRc,
     & delXfile, delYfile

C--   Input files
      NAMELIST /PARM05/
     & bathyFile, topoFile, hydrogThetaFile, hydrogSaltFile, 
     & zonalWindFile, meridWindFile,
     & thetaClimFile, saltClimFile,
     & surfQfile, EmPmRfile, surfQswfile, 
     & uVelInitFile, vVelInitFile, pSurfInitFile,
     & dQdTFile, ploadFile

C
      _BEGIN_MASTER(myThid)

C     Defaults values for input parameters
      CALL SET_DEFAULTS(
     O   viscArDefault, diffKrTDefault, diffKrSDefault,
     O   hFacMinDrDefault, delRdefault, rkFacDefault,
     I   myThid )

C--   Initialise "which vertical coordinate system used" flags.
      zCoordInputData = .FALSE.
      pCoordInputData = .FALSE.
      rCoordInputData = .FALSE.
      usingPCoords    = .FALSE.
      usingZCoords    = .FALSE.
      coordsSet       = 0

C--   Iniialise retired parameters to unlikely value
      nRetired = 0
      zonal_filt_lat  = UNSET_RL

C--   Open the parameter file
      OPEN(UNIT=scrUnit1,STATUS='SCRATCH')
      OPEN(UNIT=scrUnit2,STATUS='SCRATCH')
      OPEN(UNIT=modelDataUnit,FILE='data',STATUS='OLD',
     &     IOSTAT=errIO)
      IF ( errIO .LT. 0 ) THEN
       WRITE(msgBuf,'(A)')
     &  'S/R INI_PARMS'
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'Unable to open model parameter'
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'file "data"'
       CALL PRINT_ERROR( msgBuf , 1)
       CALL MODELDATA_EXAMPLE( myThid )
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ENDIF     

      DO WHILE ( .TRUE. )
       READ(modelDataUnit,FMT='(A)',END=1001) RECORD
       IL = MAX(ILNBLNK(RECORD),1)
       IF ( RECORD(1:1) .NE. commentCharacter )
     &     WRITE(UNIT=scrUnit1,FMT='(A)') RECORD(:IL)
        WRITE(UNIT=scrUnit2,FMT='(A)') RECORD(:IL)
      ENDDO
 1001 CONTINUE
      CLOSE(modelDataUnit)

C--   Report contents of model parameter file
      WRITE(msgBuf,'(A)') 
     &'// ======================================================='
      CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, 
     &                    SQUEEZE_RIGHT , 1)
      WRITE(msgBuf,'(A)') '// Model parameter file "data"'
      CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, 
     &                    SQUEEZE_RIGHT , 1)
      WRITE(msgBuf,'(A)') 
     &'// ======================================================='
      CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,
     &  SQUEEZE_RIGHT , 1)
      iUnit = scrUnit2
      REWIND(iUnit)
      DO WHILE ( .TRUE. )
       READ(UNIT=iUnit,FMT='(A)',END=2001) RECORD
       IL = MAX(ILNBLNK(RECORD),1)
       WRITE(msgBuf,'(A,A)') '>',RECORD(:IL)
       CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, 
     &                    SQUEEZE_RIGHT , 1)
      ENDDO
 2001 CONTINUE
      CLOSE(iUnit)
      WRITE(msgBuf,'(A)') ' '
      CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,
     &  SQUEEZE_RIGHT , 1)


C--   Read settings from model parameter file "data".
      iUnit = scrUnit1
      REWIND(iUnit)

C--   Set default "physical" parameters
      viscAz   = UNSET_RL    
      viscAr   = UNSET_RL
      viscAp   = UNSET_RL
      diffKzT  = UNSET_RL
      diffKpT  = UNSET_RL
      diffKrT  = UNSET_RL
      diffKzS  = UNSET_RL
      diffKpS  = UNSET_RL
      diffKrS  = UNSET_RL
      gBaro    = UNSET_RL
      rhoConst = UNSET_RL
      omega    = UNSET_RL
      hFacMinDr           = UNSET_RL
      hFacMinDz           = UNSET_RL
      hFacMinDp           = UNSET_RL
      convertFW2Salt = UNSET_RL
      tAlpha              = UNSET_RL
      sBeta               = UNSET_RL
      READ(UNIT=iUnit,NML=PARM01) !,IOSTAT=errIO)
      IF ( errIO .LT. 0 ) THEN
       WRITE(msgBuf,'(A)')
     &  'S/R INI_PARMS'
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'Error reading numerical model '
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'parameter file "data"'
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'Problem in namelist PARM01'
       CALL PRINT_ERROR( msgBuf , 1)
       CALL MODELDATA_EXAMPLE( myThid )
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ELSE
       WRITE(msgBuf,'(A)') 'S/R INI_PARMS ; read PARM01 : OK'
       CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,
     &                    SQUEEZE_RIGHT , 1) 
      ENDIF

      IF ( implicitFreeSurface ) freeSurfFac = 1.D0
      IF ( rigidLid            ) freeSurfFac = 0.D0
      IF ( gBaro .EQ. UNSET_RL ) gBaro=gravity
      IF ( rhoConst .EQ. UNSET_RL ) rhoConst=rhoNil
      IF ( omega .EQ. UNSET_RL ) THEN
        omega = 0. _d 0
        IF ( rotationPeriod .NE. 0. _d 0 ) 
     &  omega = 2.D0 * PI / rotationPeriod
      ELSEIF ( omega .EQ. 0. _d 0 ) THEN
        rotationPeriod = 0. _d 0
      ELSE
        rotationPeriod = 2.D0 * PI / omega
      ENDIF
      IF (atm_Rd .EQ. UNSET_RL) THEN
        atm_Rd = atm_Cp * atm_kappa
      ELSE
        atm_kappa = atm_Rd / atm_Cp
      ENDIF
C--   Momentum viscosity on/off flag.
      IF ( momViscosity        ) THEN
       vfFacMom = 1.D0
      ELSE
       vfFacMom = 0.D0
      ENDIF
C--   Momentum advection on/off flag.
      IF ( momAdvection        ) THEN
       afFacMom = 1.D0
      ELSE
       afFacMom = 0.D0
      ENDIF
C--   Momentum forcing on/off flag.
      IF ( momForcing ) THEN
       foFacMom = 1.D0
      ELSE
       foFacMom = 0.D0
      ENDIF
C--   Coriolis term on/off flag.
      IF ( useCoriolis ) THEN
       cfFacMom = 1.D0
      ELSE
       cfFacMom = 0.D0
      ENDIF
C--   Pressure term on/off flag.
      IF ( momPressureForcing ) THEN
       pfFacMom = 1.D0
      ELSE
       pfFacMom = 0.D0
      ENDIF
C--   Metric terms on/off flag.
      IF ( metricTerms ) THEN
       mTFacMom = 1.D0
      ELSE
       mTFacMom = 0.D0
      ENDIF
C--   Non-hydrostatic/quasi-hydrostatic
      IF (nonHydrostatic.AND.quasiHydrostatic) THEN
       WRITE(msgBuf,'(A)')
     &   'Illegal: both nonHydrostatic = quasiHydrostatic = TRUE'
       CALL PRINT_ERROR( msgBuf , myThid)
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ENDIF
C--   Advection and Forcing for Temp and salt  on/off flags
      tempAdvection = tempStepping .AND. tempAdvection
      tempForcing   = tempStepping .AND. tempForcing
      saltAdvection = saltStepping .AND. saltAdvection
      saltForcing   = saltStepping .AND. saltForcing
C--   z,p,r coord input switching.
      IF ( viscAz .NE. UNSET_RL ) zCoordInputData = .TRUE.
      IF ( viscAp .NE. UNSET_RL ) pCoordInputData = .TRUE.
      IF ( viscAr .NE. UNSET_RL ) rCoordInputData = .TRUE.
      IF ( viscAr .EQ. UNSET_RL )          viscAr = viscAz
      IF ( viscAr .EQ. UNSET_RL )          viscAr = viscAp
      IF ( viscAr .EQ. UNSET_RL )          viscAr = viscArDefault

      IF ( diffKzT .NE. UNSET_RL ) zCoordInputData  = .TRUE.
      IF ( diffKpT .NE. UNSET_RL ) pCoordInputData  = .TRUE.
      IF ( diffKrT .NE. UNSET_RL ) rCoordInputData  = .TRUE.
      IF ( diffKrT .EQ. UNSET_RL )          diffKrT = diffKzT
      IF ( diffKrT .EQ. UNSET_RL )          diffKrT = diffKpT
      IF ( diffKrT .EQ. UNSET_RL )          diffKrT = diffKrTDefault

      IF ( diffKzS .NE. UNSET_RL ) zCoordInputData  = .TRUE.
      IF ( diffKpS .NE. UNSET_RL ) pCoordInputData  = .TRUE.
      IF ( diffKrS .NE. UNSET_RL ) rCoordInputData  = .TRUE.
      IF ( diffKrS .EQ. UNSET_RL )          diffKrS = diffKzS
      IF ( diffKrS .EQ. UNSET_RL )          diffKrS = diffKpS
      IF ( diffKrS .EQ. UNSET_RL )          diffKrS = diffKrSDefault

      IF ( hFacMinDz .NE. UNSET_RL ) zCoordInputData = .TRUE.
      IF ( hFacMinDp .NE. UNSET_RL ) pCoordInputData = .TRUE.
      IF ( hFacMinDr .NE. UNSET_RL ) rCoordInputData = .TRUE.
      IF ( hFacMinDr .EQ. UNSET_RL ) hFacMinDr       = hFacMinDz
      IF ( hFacMinDr .EQ. UNSET_RL ) hFacMinDr       = hFacMinDp
      IF ( hFacMinDr .EQ. UNSET_RL ) hFacMinDr       = hFacMinDrDefault

      IF (convertFW2Salt.EQ.UNSET_RL) THEN
        convertFW2Salt = 35.
        IF (useRealFreshWaterFlux) convertFW2Salt=-1
      ENDIF

      IF ( ivdc_kappa .NE. 0. .AND. .NOT. implicitDiffusion ) THEN
        WRITE(msgBuf,'(A,A)')
     &  'S/R INI_PARMS: To use ivdc_kappa you must enable implicit',
     &  ' vertical diffusion.'
       CALL PRINT_ERROR( msgBuf , myThid)
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ENDIF

      coordsSet = 0
      IF ( zCoordInputData ) coordsSet = coordsSet + 1
      IF ( pCoordInputData ) coordsSet = coordsSet + 1
      IF ( rCoordInputData ) coordsSet = coordsSet + 1
      IF ( coordsSet .GT. 1 ) THEN
       WRITE(msgBuf,'(A)')
     &  'S/R INI_PARMS: Cannot mix z, p and r in the input data.'
       CALL PRINT_ERROR( msgBuf , myThid)
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ENDIF
      IF ( rhoConst .LE. 0. ) THEN
       WRITE(msgBuf,'(A)')
     &  'S/R INI_PARMS: rhoConst must be greater than 0.'
       CALL PRINT_ERROR( msgBuf , myThid)
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ELSE
       recip_rhoConst = 1.D0 / rhoConst
      ENDIF
      IF ( rhoNil .LE. 0. ) THEN
       WRITE(msgBuf,'(A)')
     &  'S/R INI_PARMS: rhoNil must be greater than 0.'
       CALL PRINT_ERROR( msgBuf , myThid)
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ELSE
       recip_rhoNil = 1.D0 / rhoNil
      ENDIF
      IF ( HeatCapacity_Cp .LE. 0. ) THEN
       WRITE(msgBuf,'(A)')
     &  'S/R INI_PARMS: HeatCapacity_Cp must be greater than 0.'
       CALL PRINT_ERROR( msgBuf , myThid)
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ELSE
       recip_Cp = 1.D0 / HeatCapacity_Cp
      ENDIF
      IF ( gravity .LE. 0. ) THEN
       WRITE(msgBuf,'(A)')
     &  'S/R INI_PARMS: gravity must be greater than 0.'
       CALL PRINT_ERROR( msgBuf , myThid)
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ELSE
       recip_gravity = 1.D0 / gravity
      ENDIF
C     Set globalFiles flag for READ_WRITE_FLD package
      CALL SET_WRITE_GLOBAL_FLD( globalFiles )
C     Set globalFiles flag for READ_WRITE_REC package
      CALL SET_WRITE_GLOBAL_REC( globalFiles )
C     Set globalFiles flag for READ_WRITE_REC package
      CALL SET_WRITE_GLOBAL_PICKUP( globalFiles )

C     Check for retired parameters still being used
      nRetired = 0
      IF ( zonal_filt_lat .NE. UNSET_RL ) THEN
       nRetired = nRetired+1
       WRITE(msgBuf,'(A,A)')
     &  'S/R INI_PARMS: Paramater "zonal_filt_lat" is',
     &  ' no longer allowed in file "data".'
       CALL PRINT_ERROR( msgBuf , myThid)
       WRITE(msgBuf,'(A,A)')
     &  'S/R INI_PARMS: Paramater "zonal_filt_lat" is',
     &  ' now read from file "data.zonfilt".'
       CALL PRINT_ERROR( msgBuf , myThid)
      ENDIF

C--   Elliptic solver parameters
      READ(UNIT=iUnit,NML=PARM02) !,IOSTAT=errIO)
      IF ( errIO .LT. 0 ) THEN
       WRITE(msgBuf,'(A)')
     &  'S/R INI_PARMS'
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'Error reading numerical model '
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'parameter file "data".'
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'Problem in namelist PARM02'
       CALL PRINT_ERROR( msgBuf , 1)
       CALL MODELDATA_EXAMPLE( myThid )
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ELSE
       WRITE(msgBuf,'(A)') 'S/R INI_PARMS ; read PARM02 : OK'
       CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,
     &                    SQUEEZE_RIGHT , 1) 
      ENDIF    

C--   Time stepping parameters
      rCD               = -1.D0
      READ(UNIT=iUnit,NML=PARM03) !,IOSTAT=errIO)
      IF ( errIO .LT. 0 ) THEN
       WRITE(msgBuf,'(A)')
     &  'S/R INI_PARMS'
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'Error reading numerical model '
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'parameter file "data"'
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'Problem in namelist PARM03'
       CALL PRINT_ERROR( msgBuf , 1)
       CALL MODELDATA_EXAMPLE( myThid )
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ELSE
       WRITE(msgBuf,'(A)') 'S/R INI_PARMS ; read PARM03 : OK'
       CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,
     &                    SQUEEZE_RIGHT , 1) 
      ENDIF   
C     Process "timestepping" params
C     o Time step size
      IF ( deltaT       .EQ. 0. ) deltaT       = deltaTmom
      IF ( deltaT       .EQ. 0. ) deltaT       = deltaTtracer
      IF ( deltaTmom    .EQ. 0. ) deltaTmom    = deltaT
      IF ( deltaTtracer .EQ. 0. ) deltaTtracer = deltaT
      IF ( deltaTClock  .EQ. 0. ) deltaTClock  = deltaT
C Note that this line should set deltaFreesurf=deltaTmom
C but this would change a lot of existing set-ups so we are
C obliged to set the default inappropriately.
C Be advised that when using asynchronous time stepping
C it is better to set deltaTreesurf=deltaTtracer
      IF ( deltaTfreesurf .EQ. 0. ) deltaTfreesurf  = deltaTmom
      IF ( periodicExternalForcing ) THEN
       IF ( externForcingCycle*externForcingPeriod .EQ. 0. ) THEN
        WRITE(msgBuf,'(A)')
     &   'S/R INI_PARMS: externForcingCycle,externForcingPeriod =0'
        CALL PRINT_ERROR( msgBuf , 1)
        STOP 'ABNORMAL END: S/R INI_PARMS'
       ENDIF
       IF ( INT(externForcingCycle/externForcingPeriod) .NE.
     &          externForcingCycle/externForcingPeriod ) THEN
        WRITE(msgBuf,'(A)')
     &   'S/R INI_PARMS: externForcingCycle <> N*externForcingPeriod'
        CALL PRINT_ERROR( msgBuf , 1)
        STOP 'ABNORMAL END: S/R INI_PARMS'
       ENDIF
       IF ( externForcingCycle.le.externForcingPeriod ) THEN
        WRITE(msgBuf,'(A)')
     &   'S/R INI_PARMS: externForcingCycle < externForcingPeriod'
        CALL PRINT_ERROR( msgBuf , 1)
        STOP 'ABNORMAL END: S/R INI_PARMS'
       ENDIF
       IF ( externForcingPeriod.lt.deltaTclock ) THEN
        WRITE(msgBuf,'(A)')
     &   'S/R INI_PARMS: externForcingPeriod < deltaTclock'
        CALL PRINT_ERROR( msgBuf , 1)
        STOP 'ABNORMAL END: S/R INI_PARMS'
       ENDIF
      ENDIF
C     o Convection frequency
      IF ( cAdjFreq .LT. 0. ) THEN
       cAdjFreq = deltaTClock
      ENDIF
      IF ( ivdc_kappa .NE. 0. .AND. cAdjFreq .NE. 0. ) THEN
       WRITE(msgBuf,'(A,A)')
     &  'S/R INI_PARMS: You have enabled both ivdc_kappa and',
     &  ' convective adjustment.'
       CALL PRINT_ERROR( msgBuf , myThid)
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ENDIF
      IF (useCDscheme) THEN
C     o CD coupling (CD scheme):
        IF ( tauCD .EQ. 0.D0 ) tauCD = deltaTmom
        IF ( rCD .LT. 0. ) rCD = 1. _d 0 - deltaTMom/tauCD
      ENDIF
C     o Temperature climatology relaxation time scale
      IF ( tauThetaClimRelax .EQ. 0.D0 ) THEN
       doThetaClimRelax     = .FALSE.
       lambdaThetaClimRelax = 0.D0
      ELSE
       doThetaClimRelax     = .TRUE.
       lambdaThetaClimRelax = 1./tauThetaClimRelax
      ENDIF
C     o Salinity climatology relaxation time scale
      IF ( tauSaltClimRelax .EQ. 0.D0 ) THEN
       doSaltClimRelax     = .FALSE.
       lambdaSaltClimRelax = 0.D0
      ELSE
       doSaltClimRelax     = .TRUE.
       lambdaSaltClimRelax = 1./tauSaltClimRelax
      ENDIF
C     o Tracer 1 climatology relaxation time scale
      IF ( tauTr1ClimRelax .EQ. 0.D0 ) THEN
       doTr1ClimRelax     = .FALSE.
       lambdaTr1ClimRelax = 0.D0
      ELSE
       doTr1ClimRelax     = .TRUE.
       lambdaTr1ClimRelax = 1./tauTr1ClimRelax
      ENDIF

C     o Start time
      IF ( nIter0 .NE. 0 .AND. startTime .EQ. 0. )
     &   startTime = deltaTClock*float(nIter0)
C     o nIter0
      IF ( nIter0 .EQ. 0 .AND. startTime .NE. 0. )
     &   nIter0 = INT( startTime/deltaTClock )

C     o nTimeSteps 1
      IF ( nTimeSteps .EQ. 0 .AND. nEndIter .NE. 0 )
     &     nTimeSteps = nEndIter-nIter0
C     o nTimeSteps 2
      IF ( nTimeSteps .EQ. 0 .AND. endTime .NE. 0. )
     &     nTimeSteps = int(0.5+(endTime-startTime)/deltaTclock)
C     o nEndIter 1
      IF ( nEndIter .EQ. 0 .AND. nTimeSteps .NE. 0 )
     &     nEndIter = nIter0+nTimeSteps
C     o nEndIter 2
      IF ( nEndIter .EQ. 0 .AND. endTime .NE. 0. )
     &     nEndIter = int(0.5+endTime/deltaTclock)
C     o End Time 1
      IF ( endTime .EQ. 0. .AND. nTimeSteps .NE. 0 )
     &     endTime = startTime + deltaTClock*float(nTimeSteps)
C     o End Time 2
      IF ( endTime .EQ. 0. .AND. nEndIter .NE. 0 )
     &     endTime = deltaTClock*float(nEndIter)

C     o Consistent?
      IF ( nEndIter .NE. nIter0+nTimeSteps ) THEN
       WRITE(msgBuf,'(A)')
     & 'S/R INI_PARMS: nIter0, nTimeSteps and nEndIter are inconsistent'
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     & 'S/R INI_PARMS: Perhaps more than two were set at once'
       CALL PRINT_ERROR( msgBuf , 1)
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ENDIF
      IF ( nTimeSteps .NE. int(0.5+(endTime-startTime)/deltaTClock) )
     & THEN
        WRITE(msgBuf,'(A)')
     &  'S/R INI_PARMS: both endTime and nTimeSteps have been set'
        CALL PRINT_ERROR( msgBuf , 1)
        WRITE(msgBuf,'(A)')
     &  'S/R INI_PARMS: but are inconsistent'
        CALL PRINT_ERROR( msgBuf , 1)
        STOP 'ABNORMAL END: S/R INI_PARMS'
      ENDIF

C     o Monitor (should also add CPP flag for monitor?)
      IF (monitorFreq.LT.0.) THEN
       monitorFreq=0.
       IF (dumpFreq.NE.0.) monitorFreq=dumpFreq
       IF (diagFreq.NE.0..AND.diagFreq.LT.monitorFreq)
     &         monitorFreq=diagFreq
       IF (taveFreq.NE.0..AND.taveFreq.LT.monitorFreq)
     &         monitorFreq=taveFreq
       IF (chkPtFreq.NE.0..AND.chkPtFreq.LT.monitorFreq)
     &         monitorFreq=chkPtFreq
       IF (pChkPtFreq.NE.0..AND.pChkPtFreq.LT.monitorFreq)
     &         monitorFreq=pChkPtFreq
       IF (monitorFreq.EQ.0.) monitorFreq=deltaTclock
      ENDIF

C--   Grid parameters
C     In cartesian coords distances are in metres
      rkFac = UNSET_RS
      DO K =1,Nr
       delZ(K) = UNSET_RL
       delP(K) = UNSET_RL
       delR(K) = UNSET_RL
      ENDDO
C     In spherical polar distances are in degrees
      recip_rSphere  = 1.D0/rSphere
      dxSpacing = UNSET_RL
      dySpacing = UNSET_RL
      delXfile = ' '
      delYfile = ' '
      READ(UNIT=iUnit,NML=PARM04,IOSTAT=errIO)
      IF ( errIO .LT. 0 ) THEN
       WRITE(msgBuf,'(A)')
     &  'S/R INI_PARMS'
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'Error reading numerical model '
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'parameter file "data"'
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'Problem in namelist PARM04'
       CALL PRINT_ERROR( msgBuf , 1)
       CALL MODELDATA_EXAMPLE( myThid )
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ELSE
       WRITE(msgBuf,'(A)') 'S/R INI_PARMS ; read PARM04 : OK'
       CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,
     &                    SQUEEZE_RIGHT , 1) 
      ENDIF    

C     X coordinate
      IF ( delXfile .NE. ' ' ) THEN
       IF ( delX(1) .NE. UNSET_RL .OR. dxSpacing .NE. UNSET_RL ) THEN
         WRITE(msgBuf,'(A,A)') 'Too many specifications for delX:',
     &   'Specify only one of delX, dxSpacing or delXfile'
        CALL PRINT_ERROR( msgBuf , 1)
        STOP 'ABNORMAL END: S/R INI_PARMS'
       ELSE
        _BEGIN_MASTER( myThid )
        IF (readBinaryPrec.EQ.precFloat32) THEN
         OPEN(37,FILE=delXfile,STATUS='OLD',FORM='UNFORMATTED',
     &        ACCESS='DIRECT',RECL=WORDLENGTH*Nx)
         READ(37,rec=1) tmp4delX
#ifdef _BYTESWAPIO
            call MDS_BYTESWAPR4( Nx, tmp4delX )
#endif
         CLOSE(37)
         DO i=1,Nx
           delX(i) = tmp4delX(i)
         ENDDO
        ELSEIF (readBinaryPrec.EQ.precFloat64) THEN
         OPEN(37,FILE=delXfile,STATUS='OLD',FORM='UNFORMATTED',
     &        ACCESS='DIRECT',RECL=WORDLENGTH*2*Nx)
         READ(37,rec=1) tmp8delX
#ifdef _BYTESWAPIO
            call MDS_BYTESWAPR8( Nx, tmp8delX )
#endif
         CLOSE(37)
         DO i=1,Nx
           delX(i) = tmp8delX(i)
         ENDDO
        ENDIF
        _END_MASTER(myThid)
       ENDIF
      ENDIF
      IF ( dxSpacing .NE. UNSET_RL ) THEN
       DO i=1,Nx
        delX(i) = dxSpacing
       ENDDO
      ENDIF
C     Y coordinate
      IF ( delYfile .NE. ' ' ) THEN
       IF ( delY(1) .NE. UNSET_RL .OR. dySpacing .NE. UNSET_RL ) THEN
         WRITE(msgBuf,'(A,A)') 'Too many specifications for delY:',
     &   'Specify only one of delY, dySpacing or delYfile'
        CALL PRINT_ERROR( msgBuf , 1)
        STOP 'ABNORMAL END: S/R INI_PARMS'
       ELSE
        _BEGIN_MASTER( myThid )
        IF (readBinaryPrec.EQ.precFloat32) THEN
         OPEN(37,FILE=delYfile,STATUS='OLD',FORM='UNFORMATTED',
     &        ACCESS='DIRECT',RECL=WORDLENGTH*Ny)
         READ(37,rec=1) tmp4delY
#ifdef _BYTESWAPIO
            call MDS_BYTESWAPR4( Ny, tmp4delY )
#endif
         CLOSE(37)
         DO j=1,Ny
           delY(j) = tmp4delY(j)
         ENDDO
        ELSEIF (readBinaryPrec.EQ.precFloat64) THEN
         OPEN(37,FILE=delYfile,STATUS='OLD',FORM='UNFORMATTED',
     &        ACCESS='DIRECT',RECL=WORDLENGTH*2*Ny)
         READ(37,rec=1) tmp8delY
#ifdef _BYTESWAPIO
            call MDS_BYTESWAPR8( Ny, tmp8delY )
#endif
         CLOSE(37)
         DO j=1,Ny
           delY(j) = tmp8delY(j)
         ENDDO
        ENDIF
        _END_MASTER(myThid)
       ENDIF
      ENDIF
      IF ( dySpacing .NE. UNSET_RL ) THEN
       DO i=1,Ny
        delY(i) = dySpacing
       ENDDO
      ENDIF
C
      IF ( rSphere .NE. 0 ) THEN
       recip_rSphere = 1.D0/rSphere
      ELSE
       recip_rSphere = 0.
      ENDIF
C--   Check for conflicting grid definitions.
      goptCount = 0
      IF ( usingCartesianGrid )      goptCount = goptCount+1
      IF ( usingSphericalPolarGrid ) goptCount = goptCount+1
      IF ( usingCurvilinearGrid )    goptCount = goptCount+1
      IF ( goptCount .GT. 1 ) THEN
       WRITE(msgBuf,'(A)')
     &  'S/R INI_PARMS: More than one coordinate system requested'
       CALL PRINT_ERROR( msgBuf , myThid)
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ENDIF
      IF ( goptCount .LT. 1 ) THEN
       WRITE(msgBuf,'(A)')
     &  'S/R INI_PARMS: No coordinate system requested'
       CALL PRINT_ERROR( msgBuf , myThid)
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ENDIF
C--   Make metric term settings consistent with underlying grid.
      IF ( usingCartesianGrid ) THEN
       usingSphericalPolarMterms = .FALSE.
       metricTerms = .FALSE.
       useNHMTerms = .FALSE.
       mTFacMom = 0.
       useBetaPlaneF = .TRUE.
      ENDIF
      IF ( usingSphericalPolarGrid ) THEN
       useConstantF  = .FALSE.
       useBetaPlaneF = .FALSE.
       useSphereF    = .TRUE.
       usingSphericalPolarMterms = metricTerms
      ENDIF
      IF ( usingCurvilinearGrid ) THEN
       useSphereF    = .TRUE.
       metricTerms = .FALSE.
       useNHMTerms = .FALSE.
      ENDIF
C--   set cell Center depth and put Interface at the middle between 2 C
      setCenterDr = .FALSE.
      IF (delRc(1).NE.UNSET_RL) setCenterDr=.TRUE.
      DO K=1,Nr+1
        IF (delRc(K).EQ.UNSET_RL) setCenterDr = .FALSE.
      ENDDO
C--   p, z, r coord parameters
      DO K = 1, Nr
       IF ( delZ(K) .NE. UNSET_RL ) zCoordInputData = .TRUE.
       IF ( delP(K) .NE. UNSET_RL ) pCoordInputData = .TRUE.
       IF ( delR(K) .NE. UNSET_RL ) rCoordInputData = .TRUE.
       IF ( delR(K) .EQ. UNSET_RL ) delR(K) = delZ(K)
       IF ( delR(K) .EQ. UNSET_RL ) delR(K) = delP(K)
       IF ( delR(K) .EQ. UNSET_RL ) delR(K) = delRDefault(K)
       IF (.NOT.setCenterDr .AND. delR(K).EQ.delRDefault(K) ) THEN
         WRITE(msgBuf,'(A,I4)')
     &  'S/R INI_PARMS: No value for delZ/delP/delR at K = ',K
         CALL PRINT_ERROR( msgBuf , 1)
         STOP 'ABNORMAL END: S/R INI_PARMS'
       ELSEIF ( setCenterDr .AND. delR(K).NE.delRDefault(K) ) THEN
         WRITE(msgBuf,'(2A,I4)') 'S/R INI_PARMS:',
     &    ' Cannot specify both delRc and delZ/delP/delR at K=', K
         CALL PRINT_ERROR( msgBuf , 1)
         STOP 'ABNORMAL END: S/R INI_PARMS'
       ENDIF
      ENDDO
C     Check for multiple coordinate systems
      CoordsSet = 0
      IF ( zCoordInputData ) coordsSet = coordsSet + 1
      IF ( pCoordInputData ) coordsSet = coordsSet + 1
      IF ( rCoordInputData ) coordsSet = coordsSet + 1
      IF ( coordsSet .GT. 1 ) THEN
       WRITE(msgBuf,'(A)')
     &  'S/R INI_PARMS: Cannot mix z, p and r in the input data.'
       CALL PRINT_ERROR( msgBuf , myThid)
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ENDIF

C--   When using the dynamical pressure in EOS (with Z-coord.),
C     needs to activate specific part of the code (restart & exchange)
c     useDynP_inEos_Zc = .FALSE.
      useDynP_inEos_Zc = ( buoyancyRelation .EQ. 'OCEANIC'
     &              .AND. ( eosType .EQ. 'JMD95P' .OR.
     &                      eosType .EQ. 'UNESCO' .OR.
     &                      eosType .EQ. 'MDJWF'       )  )

C--   Input files
      READ(UNIT=iUnit,NML=PARM05) !,IOSTAT=errIO)
      IF ( errIO .LT. 0 ) THEN    
       WRITE(msgBuf,'(A)')
     &  'Error reading numerical model '
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'parameter file "data"'
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'Problem in namelist PARM05'
       CALL PRINT_ERROR( msgBuf , 1)
       CALL MODELDATA_EXAMPLE( myThid )
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ELSE
       WRITE(msgBuf,'(A)') 'S/R INI_PARMS ; read PARM05 : OK'
       CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,
     &                    SQUEEZE_RIGHT , 1) 
      ENDIF       

C--   Set factors required for mixing pressure and meters as vertical coordinate.
C     rkFac is a "sign" parameter which is used where the orientation of the vertical
C     coordinate (pressure or meters) relative to the vertical index (K) is important.
C     rkFac =  1 applies when K and the coordinate are in the opposite sense.
C     rkFac = -1 applies when K and the coordinate are in the same sense.
C     horiVertRatio is a parameter that maps horizontal units to vertical units.
C     It is used in certain special cases where lateral and vertical terms are
C     being combined and a single frame of reference is needed.
      IF ( zCoordInputData .AND. rkFac .EQ. UNSET_RS ) THEN 
       rkFac       = 1.D0
       horiVertRatio = 1.D0
      ENDIF
      IF ( pCoordInputData .AND. rkFac .EQ. UNSET_RS ) THEN
C- jmc: any time P-coordinate is used (ocean,atmos), it requires rkFac=1
c      rkFac = -1.D0
       horiVertRatio = Gravity * rhoConst
      ENDIF
      IF ( rCoordInputData .AND. rkFac .EQ. UNSET_RS ) THEN
       rkFac =  1.D0
       horiVertRatio = 1.D0
      ENDIF
      convertEmP2rUnit = 1. _d 0
      IF (buoyancyRelation.EQ.'ATMOSPHERIC')
     &   horiVertRatio = Gravity * rhoConst
      IF (buoyancyRelation.EQ.'OCEANICP') THEN
         horiVertRatio = Gravity * rhoConst
         convertEmP2rUnit = Gravity * rhoConstFresh
      ENDIF
      IF ( rkFac .EQ. UNSET_RS ) rkFac=rkFacDefault
      recip_rkFac = 1.D0 / rkFac
      recip_horiVertRatio = 1./horiVertRatio
      IF ( zCoordInputData ) usingZCoords = .TRUE.
      IF ( pCoordInputData ) usingPCoords = .TRUE.

C
      CLOSE(iUnit)

C--   Check whether any retired parameters were found.
C--   Stop if they were
      IF ( nRetired .GT. 0 ) THEN    
       WRITE(msgBuf,'(A)')
     &  'Error reading '
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'parameter file "data"'
       CALL PRINT_ERROR( msgBuf , 1)
       WRITE(msgBuf,'(A)')
     &  'some out of date parameters were found in the namelist'
       CALL PRINT_ERROR( msgBuf , 1)
       STOP 'ABNORMAL END: S/R INI_PARMS'
      ENDIF

      _END_MASTER(myThid)

C--   Everyone else must wait for the parameters to be loaded
      _BARRIER
C
      RETURN
      END
