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jmc |
1.7 |
C $Header: /u/gcmpack/MITgcm/pkg/land/land_stepfwd.F,v 1.6 2004/06/03 16:43:14 jmc Exp $ |
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jmc |
1.1 |
C $Name: $ |
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#include "LAND_OPTIONS.h" |
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CBOP |
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C !ROUTINE: LAND_STEPFWD |
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C !INTERFACE: |
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SUBROUTINE LAND_STEPFWD( |
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I land_frc, bi, bj, myTime, myIter, myThid) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | S/R LAND_STEPFWD |
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C | o Land model main S/R: step forward land variables |
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C *==========================================================* |
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C \ev |
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C !USES: |
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IMPLICIT NONE |
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C == Global variables === |
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C-- size for MITgcm & Land package : |
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jmc |
1.7 |
#include "LAND_SIZE.h" |
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jmc |
1.1 |
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#include "EEPARAMS.h" |
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#include "LAND_PARAMS.h" |
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#include "LAND_VARS.h" |
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C !INPUT/OUTPUT PARAMETERS: |
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C == Routine arguments == |
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C land_frc :: land fraction [0-1] |
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C bi,bj :: Tile index |
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C myTime :: Current time of simulation ( s ) |
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C myIter :: Current iteration number in simulation |
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C myThid :: Number of this instance of the routine |
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_RS land_frc(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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INTEGER bi, bj, myIter, myThid |
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_RL myTime |
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CEOP |
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#ifdef ALLOW_LAND |
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C == Local variables == |
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C i,j,k :: loop counters |
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C kp1 :: k+1 |
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jmc |
1.2 |
C grd_HeatCp :: Heat capacity of the ground [J/m3/K] |
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jmc |
1.3 |
C enthalpGrdW :: enthalpy of ground water [J/m3] |
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jmc |
1.1 |
C fieldCapac :: field capacity (of water) [m] |
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jmc |
1.2 |
C mWater :: water content of the ground [kg/m3] |
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jmc |
1.3 |
C groundWnp1 :: hold temporary future soil moisture [] |
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C grdWexcess :: ground water in excess [m/s] |
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jmc |
1.1 |
C fractRunOff :: fraction of water in excess which leaves as runoff |
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jmc |
1.2 |
C flxkup :: downward flux of water, upper interface (k-1,k) |
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C flxdwn :: downward flux of water, lower interface (k,k+1) |
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jmc |
1.3 |
C flxEngU :: downward energy flux associated with water flux (W/m2) |
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C upper interface (k-1,k) |
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C flxEngL :: downward energy flux associated with water flux (W/m2) |
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C lower interface (k,k+1) |
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jmc |
1.2 |
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 mPmE :: hold temporary (liquid) Precip minus Evap [kg/m2/s] |
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C enWfx :: hold temporary energy flux of Precip [W/m2] |
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C enGr1 :: ground enthalpy of level 1 [J/m2] |
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C mSnow :: mass of snow [kg/m2] |
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C dMsn :: mass of melting snow [kg/m2] |
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C snowPrec :: snow precipitation [kg/m2/s] |
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C hNewSnow :: fresh snow accumulation [m] |
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jmc |
1.3 |
C dhSnowMx :: potential snow increase [m] |
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C dhSnow :: effective snow increase [m] |
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C mIceDt :: ground-ice growth rate (<- excess of snow) [kg/m2/s] |
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jmc |
1.2 |
C ageFac :: snow aging factor [1] |
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jmc |
1.7 |
_RL grd_HeatCp, enthalpGrdW |
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jmc |
1.3 |
_RL fieldCapac, mWater |
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_RL groundWnp1, grdWexcess, fractRunOff |
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jmc |
1.1 |
_RL flxkup(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL flxkdw(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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jmc |
1.3 |
_RL flxEngU(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL flxEngL, temp_af, temp_bf, mPmE, enWfx, enGr1 |
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jmc |
1.7 |
_RL mSnow, dMsn, snowPrec |
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jmc |
1.3 |
_RL hNewSnow, dhSnowMx, dhSnow, mIceDt, ageFac |
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jmc |
1.1 |
INTEGER i,j,k,kp1 |
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jmc |
1.6 |
#ifdef LAND_DEBUG |
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LOGICAL dBug |
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INTEGER iprt,jprt,lprt |
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DATA iprt, jprt , lprt / 19 , 20 , 6 / |
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1010 FORMAT(A,I3,1P4E11.3) |
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#endif |
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jmc |
1.2 |
IF (land_calc_grT .AND. .NOT.land_impl_grT ) THEN |
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jmc |
1.1 |
C-- Step forward ground temperature: |
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DO k=1,land_nLev |
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kp1 = MIN(k+1,land_nLev) |
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IF (k.EQ.1) THEN |
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DO j=1,sNy |
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DO i=1,sNx |
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flxkup(i,j) = land_HeatFlx(i,j,bi,bj) |
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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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flxkup(i,j) = flxkdw(i,j) |
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ENDDO |
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ENDDO |
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ENDIF |
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DO j=1,sNy |
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DO i=1,sNx |
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IF ( land_frc(i,j,bi,bj).GT.0. ) THEN |
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C- Thermal conductivity flux, lower interface (k,k+1): |
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flxkdw(i,j) = land_grdLambda* |
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& ( land_groundT(i,j,k,bi,bj) |
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& -land_groundT(i,j,kp1,bi,bj) ) |
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jmc |
1.7 |
& *land_rec_dzC(kp1) |
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jmc |
1.2 |
C- Step forward ground enthalpy, level k : |
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land_enthalp(i,j,k,bi,bj) = land_enthalp(i,j,k,bi,bj) |
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& + land_deltaT * (flxkup(i,j)-flxkdw(i,j))/land_dzF(k) |
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jmc |
1.1 |
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ENDIF |
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ENDDO |
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ENDDO |
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ENDDO |
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C-- step forward ground temperature: end |
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ENDIF |
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jmc |
1.2 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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jmc |
1.4 |
IF ( land_calc_grW .OR. land_calc_snow ) THEN |
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jmc |
1.3 |
C-- Initialize run-off arrays. |
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DO j=1,sNy |
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DO i=1,sNx |
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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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ENDDO |
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ENDDO |
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jmc |
1.4 |
ENDIF |
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#ifdef LAND_OLD_VERSION |
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IF ( .TRUE. ) THEN |
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#else |
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IF ( land_calc_grW ) THEN |
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#endif |
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jmc |
1.2 |
C-- need (later on) ground temp. to be consistent with updated enthalpy: |
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DO k=1,land_nLev |
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DO j=1,sNy |
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DO i=1,sNx |
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IF ( land_frc(i,j,bi,bj).GT.0. ) THEN |
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mWater = land_rhoLiqW*land_waterCap |
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& *land_groundW(i,j,k,bi,bj) |
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jmc |
1.6 |
mWater = MAX( mWater, 0. _d 0 ) |
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jmc |
1.2 |
grd_HeatCp = land_heatCs + land_CpWater*mWater |
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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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temp_af = land_enthalp(i,j,k,bi,bj) / grd_HeatCp |
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jmc |
1.7 |
land_groundT(i,j,k,bi,bj) = |
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jmc |
1.2 |
& MIN( temp_bf, MAX(temp_af, 0. _d 0) ) |
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jmc |
1.6 |
#ifdef LAND_DEBUG |
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dBug = bi.eq.lprt .AND. i.EQ.iprt .AND. j.EQ.jprt |
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IF (dBug) write(6,1010) |
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& 'LAND_STEPFWD: k,temp,af,bf=', |
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& k,land_groundT(i,j,k,bi,bj),temp_af,temp_bf |
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#endif |
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jmc |
1.2 |
ENDIF |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDIF |
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IF ( land_calc_snow ) THEN |
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C-- Step forward Snow thickness (also account for rain temperature) |
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ageFac = 1. _d 0 - land_deltaT/timeSnowAge |
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DO j=1,sNy |
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DO i=1,sNx |
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IF ( land_frc(i,j,bi,bj).GT.0. ) THEN |
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mPmE = land_Pr_m_Ev(i,j,bi,bj) |
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enWfx = land_EnWFlux(i,j,bi,bj) |
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enGr1 = land_enthalp(i,j,1,bi,bj)*land_dzF(1) |
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jmc |
1.6 |
#ifdef LAND_DEBUG |
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dBug = bi.eq.lprt .AND. i.EQ.iprt .AND. j.EQ.jprt |
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IF (dBug) write(6,1010) |
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& 'LAND_STEPFWD:mPmE,enWfx,enGr1/dt,hSnow=',0, |
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& mPmE,enWfx,enGr1/land_deltaT,land_hSnow(i,j,bi,bj) |
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#endif |
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jmc |
1.2 |
C- snow aging: |
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jmc |
1.7 |
land_snowAge(i,j,bi,bj) = |
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jmc |
1.2 |
& ( land_deltaT + land_snowAge(i,j,bi,bj)*ageFac ) |
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IF ( enWfx.LT.0. ) THEN |
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jmc |
1.5 |
C- snow precip in excess ( > Evap of snow) or snow prec & Evap of Liq.Water: |
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jmc |
1.7 |
C => start to melt (until ground at freezing point) and then accumulate |
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jmc |
1.2 |
snowPrec = -enWfx -MAX( enGr1/land_deltaT, 0. _d 0 ) |
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jmc |
1.5 |
C- snow accumulation cannot be larger that net precip |
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snowPrec = MAX( 0. _d 0 , |
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& MIN( snowPrec*recip_Lfreez, mPmE ) ) |
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jmc |
1.2 |
mPmE = mPmE - snowPrec |
| 200 |
jmc |
1.3 |
flxEngU(i,j) = enWfx + land_Lfreez*snowPrec |
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jmc |
1.2 |
hNewSnow = land_deltaT * snowPrec / land_rhoSnow |
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C- refresh snow age: |
| 203 |
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land_snowAge(i,j,bi,bj) = land_snowAge(i,j,bi,bj) |
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& *EXP( -hNewSnow/hNewSnowAge ) |
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jmc |
1.3 |
C- update snow thickness: |
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c land_hSnow(i,j,bi,bj) = land_hSnow(i,j,bi,bj) + hNewSnow |
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C glacier & ice-sheet missing: excess of snow put directly into run-off |
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jmc |
1.7 |
dhSnowMx = MAX( 0. _d 0, |
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jmc |
1.3 |
& land_hMaxSnow - land_hSnow(i,j,bi,bj) ) |
| 210 |
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dhSnow = MIN( hNewSnow, dhSnowMx ) |
| 211 |
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land_hSnow(i,j,bi,bj) = land_hSnow(i,j,bi,bj) + dhSnow |
| 212 |
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mIceDt = land_rhoSnow * (hNewSnow-dhSnow) / land_deltaT |
| 213 |
jmc |
1.7 |
land_runOff(i,j,bi,bj) = mIceDt |
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jmc |
1.3 |
land_enRnOf(i,j,bi,bj) = -mIceDt*land_Lfreez |
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jmc |
1.6 |
#ifdef LAND_DEBUG |
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IF (dBug) write(6,1010) |
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& 'LAND_STEPFWD: 3,snP,mPmE,hNsnw,hSnw=', |
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& 3,snowPrec,mPmE,hNewSnow,land_hSnow(i,j,bi,bj) |
| 219 |
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#endif |
| 220 |
jmc |
1.2 |
ELSE |
| 221 |
jmc |
1.5 |
C- rain precip (whatever Evap is) or Evap of snow exceeds snow precip: |
| 222 |
jmc |
1.2 |
C => snow melts or sublimates |
| 223 |
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c snowMelt = MIN( enWfx*recip_Lfreez , |
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c & land_hSnow(i,j,bi,bj)*land_rhoSnow/land_deltaT ) |
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mSnow = land_hSnow(i,j,bi,bj)*land_rhoSnow |
| 226 |
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dMsn = enWfx*recip_Lfreez*land_deltaT |
| 227 |
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IF ( dMsn .GE. mSnow ) THEN |
| 228 |
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dMsn = mSnow |
| 229 |
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land_hSnow(i,j,bi,bj) = 0. _d 0 |
| 230 |
jmc |
1.3 |
flxEngU(i,j) = enWfx - land_Lfreez*mSnow/land_deltaT |
| 231 |
jmc |
1.2 |
ELSE |
| 232 |
jmc |
1.3 |
flxEngU(i,j) = 0. _d 0 |
| 233 |
jmc |
1.2 |
land_hSnow(i,j,bi,bj) = land_hSnow(i,j,bi,bj) |
| 234 |
jmc |
1.7 |
& - dMsn / land_rhoSnow |
| 235 |
jmc |
1.2 |
ENDIF |
| 236 |
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c IF (mPmE.GT.0.) land_snowAge(i,j,bi,bj) = timeSnowAge |
| 237 |
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mPmE = mPmE + dMsn/land_deltaT |
| 238 |
jmc |
1.6 |
#ifdef LAND_DEBUG |
| 239 |
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IF (dBug) write(6,1010) |
| 240 |
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& 'LAND_STEPFWD: 4,dMsn,mPmE,hSnw,enWfx=', |
| 241 |
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& 4,dMsn,mPmE,land_hSnow(i,j,bi,bj),flxEngU(i,j) |
| 242 |
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#endif |
| 243 |
jmc |
1.2 |
ENDIF |
| 244 |
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flxkup(i,j) = mPmE/land_rhoLiqW |
| 245 |
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c land_Pr_m_Ev(i,j,bi,bj) = mPmE |
| 246 |
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IF ( land_hSnow(i,j,bi,bj).LE. 0. _d 0 ) |
| 247 |
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& land_snowAge(i,j,bi,bj) = 0. _d 0 |
| 248 |
jmc |
1.7 |
C- avoid negative (but very small, < 1.e-34) hSnow that occurs because |
| 249 |
jmc |
1.2 |
C of truncation error. Might need to rewrite this part. |
| 250 |
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c IF ( land_hSnow(i,j,bi,bj).LE. 0. _d 0 ) THEN |
| 251 |
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c land_hSnow(i,j,bi,bj) = 0. _d 0 |
| 252 |
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c land_snowAge(i,j,bi,bj) = 0. _d 0 |
| 253 |
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c ENDIF |
| 254 |
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ENDIF |
| 255 |
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ENDDO |
| 256 |
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ENDDO |
| 257 |
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ELSE |
| 258 |
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DO j=1,sNy |
| 259 |
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DO i=1,sNx |
| 260 |
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flxkup(i,j) = land_Pr_m_Ev(i,j,bi,bj)/land_rhoLiqW |
| 261 |
jmc |
1.3 |
flxEngU(i,j) = 0. _d 0 |
| 262 |
jmc |
1.2 |
ENDDO |
| 263 |
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ENDDO |
| 264 |
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ENDIF |
| 265 |
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| 266 |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 267 |
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| 268 |
jmc |
1.1 |
IF (land_calc_grW) THEN |
| 269 |
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C-- Step forward ground Water: |
| 270 |
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| 271 |
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DO k=1,land_nLev |
| 272 |
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IF (k.EQ.land_nLev) THEN |
| 273 |
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kp1 = k |
| 274 |
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fractRunOff = 1. _d 0 |
| 275 |
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ELSE |
| 276 |
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kp1 = k+1 |
| 277 |
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fractRunOff = land_fractRunOff |
| 278 |
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ENDIF |
| 279 |
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fieldCapac = land_waterCap*land_dzF(k) |
| 280 |
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| 281 |
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DO j=1,sNy |
| 282 |
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DO i=1,sNx |
| 283 |
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IF ( land_frc(i,j,bi,bj).GT.0. ) THEN |
| 284 |
jmc |
1.6 |
#ifdef LAND_DEBUG |
| 285 |
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dBug = bi.eq.lprt .AND. i.EQ.iprt .AND. j.EQ.jprt |
| 286 |
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#endif |
| 287 |
jmc |
1.3 |
|
| 288 |
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#ifdef LAND_OLD_VERSION |
| 289 |
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IF ( .TRUE. ) THEN |
| 290 |
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IF ( k.EQ.land_nLev ) THEN |
| 291 |
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#else |
| 292 |
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IF ( land_groundT(i,j,k,bi,bj).LT.0. _d 0 ) THEN |
| 293 |
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C- Frozen level: only account for upper level fluxes |
| 294 |
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IF ( flxkup(i,j) .LT. 0. _d 0 ) THEN |
| 295 |
|
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C- Step forward soil moisture (& enthapy), level k : |
| 296 |
|
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land_groundW(i,j,k,bi,bj) = land_groundW(i,j,k,bi,bj) |
| 297 |
|
|
& + land_deltaT * flxkup(i,j) / fieldCapac |
| 298 |
|
|
IF ( land_calc_snow ) |
| 299 |
|
|
& land_enthalp(i,j,k,bi,bj) = land_enthalp(i,j,k,bi,bj) |
| 300 |
|
|
& + land_deltaT * flxEngU(i,j) / land_dzF(k) |
| 301 |
|
|
ELSE |
| 302 |
|
|
C- Frozen level: incoming water flux goes directly into run-off |
| 303 |
|
|
land_runOff(i,j,bi,bj) = land_runOff(i,j,bi,bj) |
| 304 |
jmc |
1.7 |
& + flxkup(i,j)*land_rhoLiqW |
| 305 |
jmc |
1.3 |
land_enRnOf(i,j,bi,bj) = land_enRnOf(i,j,bi,bj) |
| 306 |
|
|
& + flxEngU(i,j) |
| 307 |
|
|
ENDIF |
| 308 |
|
|
C- prepare fluxes for next level: |
| 309 |
|
|
flxkup(i,j) = 0. _d 0 |
| 310 |
|
|
flxEngU(i,j) = 0. _d 0 |
| 311 |
|
|
|
| 312 |
|
|
ELSE |
| 313 |
|
|
|
| 314 |
|
|
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 315 |
jmc |
1.2 |
C- Diffusion flux of water, lower interface (k,k+1): |
| 316 |
jmc |
1.3 |
IF ( k.EQ.land_nLev .OR. |
| 317 |
|
|
& land_groundT(i,j,kp1,bi,bj).LT.0. _d 0 ) THEN |
| 318 |
|
|
#endif /* LAND_OLD_VERSION */ |
| 319 |
|
|
C- no Diffusion of water if one level is frozen : |
| 320 |
|
|
flxkdw(i,j) = 0. _d 0 |
| 321 |
|
|
flxEngL = 0. _d 0 |
| 322 |
|
|
ELSE |
| 323 |
|
|
flxkdw(i,j) = fieldCapac* |
| 324 |
|
|
& ( land_groundW(i,j,k,bi,bj) |
| 325 |
|
|
& -land_groundW(i,j,kp1,bi,bj) ) |
| 326 |
|
|
& / land_wTauDiff |
| 327 |
|
|
C- energy flux associated with water flux: take upwind Temp |
| 328 |
|
|
IF ( flxkdw(i,j).GE.0. ) THEN |
| 329 |
|
|
flxEngL = flxkdw(i,j)*land_rhoLiqW*land_CpWater |
| 330 |
|
|
& *land_groundT(i,j,k,bi,bj) |
| 331 |
|
|
ELSE |
| 332 |
|
|
flxEngL = flxkdw(i,j)*land_rhoLiqW*land_CpWater |
| 333 |
|
|
& *land_groundT(i,j,kp1,bi,bj) |
| 334 |
|
|
ENDIF |
| 335 |
|
|
ENDIF |
| 336 |
jmc |
1.7 |
|
| 337 |
jmc |
1.1 |
C- Step forward soil moisture, level k : |
| 338 |
jmc |
1.3 |
groundWnp1 = land_groundW(i,j,k,bi,bj) |
| 339 |
jmc |
1.2 |
& + land_deltaT * (flxkup(i,j)-flxkdw(i,j)) / fieldCapac |
| 340 |
jmc |
1.3 |
|
| 341 |
jmc |
1.6 |
#ifdef LAND_DEBUG |
| 342 |
|
|
IF(dBug)write(6,1010)'LAND_STEPFWD: grdW-1,fx_ku,kd,grdW-1=' |
| 343 |
|
|
& ,5,land_groundW(i,j,k,bi,bj)-1., |
| 344 |
|
|
& flxkup(i,j),flxkdw(i,j),groundWnp1-1. |
| 345 |
|
|
#endif |
| 346 |
|
|
|
| 347 |
jmc |
1.3 |
C- Water in excess will leave as run-off or go to level below |
| 348 |
|
|
land_groundW(i,j,k,bi,bj) = MIN(1. _d 0, groundWnp1) |
| 349 |
|
|
grdWexcess = ( groundWnp1 - MIN(1. _d 0, groundWnp1) ) |
| 350 |
|
|
& *fieldCapac/land_deltaT |
| 351 |
jmc |
1.1 |
|
| 352 |
|
|
C- Run off: fraction 1-fractRunOff enters level below |
| 353 |
jmc |
1.3 |
land_runOff(i,j,bi,bj) = land_runOff(i,j,bi,bj) |
| 354 |
jmc |
1.7 |
& + fractRunOff*grdWexcess*land_rhoLiqW |
| 355 |
jmc |
1.3 |
C- prepare fluxes for next level: |
| 356 |
|
|
flxkup(i,j) = flxkdw(i,j) |
| 357 |
|
|
& + (1. _d 0-fractRunOff)*grdWexcess |
| 358 |
|
|
|
| 359 |
|
|
IF ( land_calc_snow ) THEN |
| 360 |
|
|
enthalpGrdW = land_rhoLiqW*land_CpWater |
| 361 |
|
|
& *land_groundT(i,j,k,bi,bj) |
| 362 |
|
|
C-- Account for water fluxes in energy budget: update ground Enthalpy |
| 363 |
|
|
land_enthalp(i,j,k,bi,bj) = land_enthalp(i,j,k,bi,bj) |
| 364 |
jmc |
1.7 |
& + ( flxEngU(i,j) - flxEngL - grdWexcess*enthalpGrdW |
| 365 |
jmc |
1.3 |
& )*land_deltaT/land_dzF(k) |
| 366 |
|
|
|
| 367 |
|
|
land_enRnOf(i,j,bi,bj) = land_enRnOf(i,j,bi,bj) |
| 368 |
|
|
& + fractRunOff*grdWexcess*enthalpGrdW |
| 369 |
|
|
C- prepare fluxes for next level: |
| 370 |
|
|
flxEngU(i,j) = flxEngL |
| 371 |
|
|
& + (1. _d 0-fractRunOff)*grdWexcess*enthalpGrdW |
| 372 |
|
|
ENDIF |
| 373 |
jmc |
1.6 |
#ifdef LAND_DEBUG |
| 374 |
|
|
IF (dBug) write(6,1010) 'LAND_STEPFWD: Temp,FlxE,FlxW=', |
| 375 |
|
|
& 7, land_groundT(i,j,k,bi,bj), flxEngU(i,j), flxkup(i,j) |
| 376 |
|
|
#endif |
| 377 |
jmc |
1.2 |
ENDIF |
| 378 |
jmc |
1.3 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 379 |
jmc |
1.6 |
#ifdef LAND_DEBUG |
| 380 |
|
|
IF (dBug) write(6,1010) 'LAND_STEPFWD: RO,enRO=', |
| 381 |
|
|
& 8, land_runOff(i,j,bi,bj),land_enRnOf(i,j,bi,bj) |
| 382 |
|
|
#endif |
| 383 |
jmc |
1.2 |
|
| 384 |
jmc |
1.1 |
ENDIF |
| 385 |
|
|
ENDDO |
| 386 |
|
|
ENDDO |
| 387 |
|
|
|
| 388 |
|
|
ENDDO |
| 389 |
|
|
C-- step forward ground Water: end |
| 390 |
jmc |
1.2 |
ENDIF |
| 391 |
|
|
|
| 392 |
|
|
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 393 |
|
|
|
| 394 |
jmc |
1.3 |
IF ( land_calc_grT ) THEN |
| 395 |
|
|
C-- Compute ground temperature from enthalpy (if not already done): |
| 396 |
jmc |
1.2 |
|
| 397 |
|
|
DO k=1,land_nLev |
| 398 |
|
|
DO j=1,sNy |
| 399 |
|
|
DO i=1,sNx |
| 400 |
|
|
C- Ground Heat capacity, layer k: |
| 401 |
|
|
mWater = land_rhoLiqW*land_waterCap |
| 402 |
|
|
& *land_groundW(i,j,k,bi,bj) |
| 403 |
jmc |
1.6 |
mWater = MAX( mWater, 0. _d 0 ) |
| 404 |
jmc |
1.2 |
grd_HeatCp = land_heatCs + land_CpWater*mWater |
| 405 |
|
|
C temperature below freezing: |
| 406 |
|
|
temp_bf = (land_enthalp(i,j,k,bi,bj)+land_Lfreez*mWater) |
| 407 |
|
|
& / grd_HeatCp |
| 408 |
|
|
C temperature above freezing: |
| 409 |
|
|
temp_af = land_enthalp(i,j,k,bi,bj) / grd_HeatCp |
| 410 |
|
|
#ifdef LAND_OLD_VERSION |
| 411 |
jmc |
1.7 |
land_enthalp(i,j,k,bi,bj) = |
| 412 |
jmc |
1.2 |
& grd_HeatCp*land_groundT(i,j,k,bi,bj) |
| 413 |
|
|
#else |
| 414 |
jmc |
1.7 |
land_groundT(i,j,k,bi,bj) = |
| 415 |
jmc |
1.2 |
& MIN( temp_bf, MAX(temp_af, 0. _d 0) ) |
| 416 |
|
|
#endif |
| 417 |
|
|
ENDDO |
| 418 |
|
|
ENDDO |
| 419 |
|
|
ENDDO |
| 420 |
|
|
|
| 421 |
|
|
IF ( land_impl_grT ) THEN |
| 422 |
|
|
DO j=1,sNy |
| 423 |
|
|
DO i=1,sNx |
| 424 |
|
|
IF ( land_hSnow(i,j,bi,bj).GT.0. _d 0 ) THEN |
| 425 |
|
|
land_skinT(i,j,bi,bj) = MIN(land_skinT(i,j,bi,bj), 0. _d 0) |
| 426 |
|
|
ELSE |
| 427 |
|
|
land_skinT(i,j,bi,bj) = land_groundT(i,j,1,bi,bj) |
| 428 |
|
|
ENDIF |
| 429 |
|
|
ENDDO |
| 430 |
|
|
ENDDO |
| 431 |
jmc |
1.7 |
ELSE |
| 432 |
jmc |
1.2 |
DO j=1,sNy |
| 433 |
|
|
DO i=1,sNx |
| 434 |
|
|
land_skinT(i,j,bi,bj) = land_groundT(i,j,1,bi,bj) |
| 435 |
|
|
ENDDO |
| 436 |
|
|
ENDDO |
| 437 |
|
|
ENDIF |
| 438 |
|
|
|
| 439 |
|
|
C-- Compute ground temperature: end |
| 440 |
jmc |
1.1 |
ENDIF |
| 441 |
|
|
|
| 442 |
|
|
#endif /* ALLOW_LAND */ |
| 443 |
|
|
|
| 444 |
|
|
RETURN |
| 445 |
|
|
END |
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