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C $Header: /u/gcmpack/MITgcm/pkg/land/land_ini_vars.F,v 1.2 2003/07/31 18:22:10 jmc Exp $ |
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C $Name: $ |
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#include "LAND_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: LAND_INI_VARS |
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C !INTERFACE: |
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SUBROUTINE LAND_INI_VARS( myThid ) |
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|
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | S/R LAND_INI_VARS |
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C | o Initialize Land package variables |
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C *==========================================================* |
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C | for now, used only for a restart |
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C *==========================================================* |
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C \ev |
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|
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C !USES: |
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IMPLICIT NONE |
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|
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C == Global variables === |
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|
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C-- size for MITgcm & Land package : |
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#include "LAND_SIZE.h" |
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|
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "LAND_PARAMS.h" |
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#include "LAND_VARS.h" |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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C == Routine Arguments == |
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C myThid - Number of this instance |
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INTEGER myThid |
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CEOP |
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|
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#ifdef ALLOW_LAND |
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|
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C == Local Variables == |
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C msgBuf - Informational/error meesage buffer |
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C i,j,k,bi,bj :: loop indices |
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C grd_HeatCp :: Heat capacity of the ground (J/m3/K) |
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C mWater :: water content of the ground (kg/m3) |
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C temp_af :: ground temperature if above freezing |
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C temp_bf :: ground temperature if below freezing |
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c CHARACTER*(MAX_LEN_MBUF) msgBuf |
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INTEGER i,j,k,bi,bj |
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_RL grd_HeatCp, mWater |
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_RL temp_af, temp_bf |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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C-- Initialize Land package variables |
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|
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C- Over all tiles |
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DO bj = myByLo(myThid), myByHi(myThid) |
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DO bi = myBxLo(myThid), myBxHi(myThid) |
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|
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C- 3D arrays |
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DO k=1,land_nLev |
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DO J=1-Oly,sNy+Oly |
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DO I=1-Olx,sNx+Olx |
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land_groundT(i,j,k,bi,bj) = 0. _d 0 |
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land_enthalp(i,j,k,bi,bj) = 0. _d 0 |
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land_groundW(i,j,k,bi,bj) = 0. _d 0 |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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C- 2D arrays |
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DO J=1-Oly,sNy+Oly |
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DO I=1-Olx,sNx+Olx |
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land_skinT (i,j,bi,bj) = 0. _d 0 |
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land_hSnow (i,j,bi,bj) = 0. _d 0 |
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land_snowAge(i,j,bi,bj) = 0. _d 0 |
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land_runOff (i,j,bi,bj) = 0. _d 0 |
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land_enRnOf (i,j,bi,bj) = 0. _d 0 |
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land_HeatFLx(i,j,bi,bj) = 0. _d 0 |
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land_Pr_m_Ev(i,j,bi,bj) = 0. _d 0 |
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land_EnWFlux(i,j,bi,bj) = 0. _d 0 |
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ENDDO |
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ENDDO |
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|
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C- end bi,bj loops |
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ENDDO |
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ENDDO |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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IF ( startTime.EQ.0. .AND. nIter0.EQ.0 ) THEN |
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|
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C-- Define the initial state : read from file |
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_BEGIN_MASTER( myThid ) |
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IF ( land_grT_iniFile .NE. ' ' ) THEN |
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CALL MDSREADFIELD( land_grT_iniFile, readBinaryPrec, 'RL', |
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& land_nLev, land_groundT, 1, myThid) |
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ENDIF |
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IF ( land_grW_iniFile .NE. ' ' ) THEN |
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CALL MDSREADFIELD( land_grW_iniFile, readBinaryPrec, 'RL', |
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& land_nLev, land_groundW, 1, myThid) |
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ENDIF |
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IF ( land_snow_iniFile .NE. ' ' ) THEN |
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CALL MDSREADFIELD( land_snow_iniFile,readBinaryPrec, 'RL', |
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& 1, land_hSnow, 1, myThid) |
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ENDIF |
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_END_MASTER(myThid) |
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|
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C- to have a consistent initial stater: derive surface Temp, |
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C & enthalpy (assuming liquid water only): |
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|
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ELSEIF ( land_calc_grT .OR. land_calc_grW ) THEN |
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|
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C-- Read Land package state variables from pickup file |
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CALL LAND_READ_PICKUP( nIter0, myThid ) |
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|
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c ELSE |
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C- a trick to allow to start without a land pickup: |
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C load grT & grW from AIM surf. BC in S/R aim_land2aim |
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ENDIF |
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|
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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|
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C- to have a consistent initial state: derive surface Temp, |
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C & enthalpy (assuming liquid water only): |
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IF ( ( startTime.EQ.0. .AND. nIter0.EQ.0 ) .OR. |
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& .NOT.( land_calc_grT .OR. land_calc_grW ) .OR. |
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& land_oldPickup ) THEN |
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DO j=1,sNy |
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DO i=1,sNx |
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c IF ( land_frc(i,j,bi,bj).GT.0. ) THEN |
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DO k=1,land_nLev |
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mWater = land_rhoLiqW*land_waterCap |
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& *land_groundW(i,j,k,bi,bj) |
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grd_HeatCp = land_heatCs + land_CpWater*mWater |
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land_enthalp(i,j,k,bi,bj) = |
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& grd_HeatCp*land_groundT(i,j,k,bi,bj) |
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IF (land_groundT(i,j,k,bi,bj).LT. 0. _d 0) |
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& land_enthalp(i,j,k,bi,bj) = land_enthalp(i,j,k,bi,bj) |
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& - land_Lfreez*mWater |
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ENDDO |
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land_skinT(i,j,bi,bj) = land_groundT(i,j,1,bi,bj) |
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c ENDIF |
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ENDDO |
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ENDDO |
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ELSE |
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DO j=1,sNy |
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DO i=1,sNx |
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DO k=1,land_nLev |
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mWater = land_rhoLiqW*land_waterCap |
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& *land_groundW(i,j,k,bi,bj) |
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grd_HeatCp = land_heatCs + land_CpWater*mWater |
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C temperature if below freezing: |
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temp_bf = (land_enthalp(i,j,k,bi,bj)+land_Lfreez*mWater) |
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& / grd_HeatCp |
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C temperature if above freezing: |
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temp_af = land_enthalp(i,j,k,bi,bj) / grd_HeatCp |
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land_groundT(i,j,k,bi,bj) = |
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& MIN( temp_bf, MAX(temp_af, 0. _d 0) ) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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C- end bi,bj loops |
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ENDDO |
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ENDDO |
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#endif /* ALLOW_LAND */ |
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|
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RETURN |
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END |
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