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dimitri |
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C $Header: /u/gcmpack/MITgcm/model/src/freeze_interior.F,v 1.1 2011/04/20 13:45:14 dimitri Exp $ |
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dimitri |
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C $Name: $ |
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#include "PACKAGES_CONFIG.h" |
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#include "CPP_OPTIONS.h" |
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CBOP |
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C !ROUTINE: FREEZE_INTERIOR |
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C !INTERFACE: |
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SUBROUTINE FREEZE_INTERIOR( myTime, myIter, myThid ) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | S/R FREEZE_INTERIOR |
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C | o Check water temperature and if colder than freezing |
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C | point bring excess negative heat to the surface. |
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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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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "DYNVARS.h" |
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#include "GRID.h" |
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#include "FFIELDS.h" |
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C !INPUT/OUTPUT PARAMETERS: |
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C == Routine Arguments == |
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C myTime - Current time in simulation |
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C myIter - Current iteration number in simulation |
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C myThid :: Thread no. that called this routine. |
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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C !LOCAL VARIABLES: |
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C == Local variables == |
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C Tfreezing :: Freezing threshold temperature. |
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INTEGER bi,bj,i,j,k,kTop |
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_RL Tfreezing, Tresid, pLoc, sLoc, tLoc |
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_RL a0, a1, a2, b |
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PARAMETER( a0 = -0.0575 _d 0 ) |
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PARAMETER( a1 = 1.710523 _d -3 ) |
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PARAMETER( a2 = -2.154996 _d -4 ) |
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PARAMETER( b = -7.53 _d -4 ) |
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_RL SW_TEMP |
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EXTERNAL SW_TEMP |
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CEOP |
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C Check for water below freezing point. |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO k = 2, Nr |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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IF ( maskC(i,j,k-1,bi,bj) .NE. 0. _d 0 .AND. |
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& maskC(i,j,k, bi,bj) .NE. 0. _d 0 ) THEN |
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pLoc = ABS(RC(k)) |
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sLoc = MAX(salt(i,j,k,bi,bj), 0. _d 0) |
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tLoc = SW_TEMP(sLoc,theta(i,j,k,bi,bj),pLoc,0. _d 0) |
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C Freezing point of seawater |
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C REFERENCE: UNESCO TECH. PAPERS IN THE MARINE SCIENCE NO. 28. 1978 |
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C EIGHTH REPORT JPOTS |
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C ANNEX 6 FREEZING POINT OF SEAWATER F.J. MILLERO PP.29-35. |
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C |
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C UNITS: |
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C PRESSURE P DECIBARS |
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C SALINITY S PSS-78 |
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C TEMPERATURE TF DEGREES CELSIUS |
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C FREEZING PT. |
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C************************************************************ |
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C CHECKVALUE: TF= -2.588567 DEG. C FOR S=40.0, P=500. DECIBARS |
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Tfreezing = (a0 + a1*sqrt(sLoc) + a2*sLoc) * sLoc + b*pLoc |
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IF (tLoc .LT. Tfreezing) THEN |
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C Move the negative heat to surface level. |
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kTop = kSurfC(i,j,bi,bj) |
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Tresid = Tfreezing - tloc |
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theta(i,j,k,bi,bj) = theta(i,j,k,bi,bj) + Tresid |
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theta(i,j,kTop,bi,bj) = theta(i,j,kTop,bi,bj) - |
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& Tresid * hFacC(i,j,k,bi,bj) * dRf(k) * |
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& recip_hFacC(i,j,kTop,bi,bj) * recip_drF(kTop) |
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ENDIF |
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ENDIF |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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RETURN |
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END |
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