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C $Header: /u/gcmpack/MITgcm/pkg/seaice/seaice_dynsolver.F,v 1.54 2012/10/21 04:34:07 heimbach Exp $ |
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C $Name: $ |
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|
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#include "SEAICE_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: SEAICE_DYNSOLVER |
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C !INTERFACE: |
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SUBROUTINE SEAICE_DYNSOLVER( myTime, myIter, myThid ) |
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|
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C *==========================================================* |
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C | SUBROUTINE SEAICE_DYNSOLVER |
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C | o Ice dynamics using LSR solver |
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C | Zhang and Hibler, JGR, 102, 8691-8702, 1997 |
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C | or EVP explicit solver by Hunke and Dukowicz, JPO 27, |
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C | 1849-1867 (1997) |
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C *==========================================================* |
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C | written by Martin Losch, March 2006 |
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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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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "GRID.h" |
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#include "SURFACE.h" |
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#include "DYNVARS.h" |
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#include "FFIELDS.h" |
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#include "SEAICE_SIZE.h" |
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#include "SEAICE_PARAMS.h" |
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#include "SEAICE.h" |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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# include "tamc.h" |
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#endif |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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C === Routine arguments === |
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C myTime :: Simulation time |
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C myIter :: Simulation timestep number |
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C myThid :: my Thread Id. number |
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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CEOP |
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|
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#ifdef SEAICE_CGRID |
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|
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C !FUNCTIONS: |
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LOGICAL DIFFERENT_MULTIPLE |
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EXTERNAL DIFFERENT_MULTIPLE |
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|
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C !LOCAL VARIABLES: |
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C === Local variables === |
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C i,j,bi,bj :: Loop counters |
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INTEGER i, j, bi, bj |
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_RL PSTAR |
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_RL phiSurf(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL mask_uice, mask_vice |
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|
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# ifdef ALLOW_AUTODIFF_TAMC |
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C Following re-initialisation breaks some "artificial" AD dependencies |
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C incured by IF (DIFFERENT_MULTIPLE ... statement |
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PSTAR = SEAICE_strength |
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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 j=1-OLy+1,sNy+OLy |
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DO i=1-OLx+1,sNx+OLx |
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PRESS0(i,j,bi,bj) = PSTAR*HEFF(i,j,bi,bj) |
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& *EXP(-20.0 _d 0*(ONE-AREA(i,j,bi,bj))) |
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ZMAX(I,J,bi,bj) = SEAICE_zetaMaxFac*PRESS0(I,J,bi,bj) |
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ZMIN(i,j,bi,bj) = SEAICE_zetaMin |
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PRESS0(i,j,bi,bj) = PRESS0(i,j,bi,bj)*HEFFM(i,j,bi,bj) |
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TAUX(i,j,bi,bj) = 0. _d 0 |
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TAUY(i,j,bi,bj) = 0. _d 0 |
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#ifdef SEAICE_ALLOW_FREEDRIFT |
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uice_fd(i,j,bi,bj)= 0. _d 0 |
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vice_fd(i,j,bi,bj)= 0. _d 0 |
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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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C |
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CADJ STORE uice = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE vice = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE uicenm1 = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE vicenm1 = comlev1, key=ikey_dynamics, kind=isbyte |
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# endif /* ALLOW_AUTODIFF_TAMC */ |
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|
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IF ( |
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& DIFFERENT_MULTIPLE(SEAICE_deltaTdyn,myTime,SEAICE_deltaTtherm) |
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& ) THEN |
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|
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# ifdef ALLOW_AUTODIFF_TAMC |
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# ifdef SEAICE_ALLOW_EVP |
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CADJ STORE press0 = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE zmax = comlev1, key=ikey_dynamics, kind=isbyte |
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# endif |
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# endif /* ALLOW_AUTODIFF_TAMC */ |
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|
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C-- FIRST SET UP BASIC CONSTANTS |
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PSTAR = SEAICE_strength |
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|
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C-- NOW SET UP MASS PER UNIT AREA AND CORIOLIS TERM |
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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 j=1-OLy+1,sNy+OLy |
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DO i=1-OLx+1,sNx+OLx |
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seaiceMassC(I,J,bi,bj)=SEAICE_rhoIce*HEFF(i,j,bi,bj) |
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seaiceMassU(I,J,bi,bj)=SEAICE_rhoIce*HALF*( |
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& HEFF(i,j,bi,bj) + HEFF(i-1,j ,bi,bj) ) |
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seaiceMassV(I,J,bi,bj)=SEAICE_rhoIce*HALF*( |
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& HEFF(i,j,bi,bj) + HEFF(i ,j-1,bi,bj) ) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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#ifndef ALLOW_AUTODIFF_TAMC |
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IF ( SEAICE_maskRHS ) THEN |
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C dynamic masking of areas with no ice |
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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 j=1-OLy+1,sNy+OLy |
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DO i=1-OLx+1,sNx+OLx |
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seaiceMaskU(I,J,bi,bj)=AREA(i,j,bi,bj)+AREA(I-1,J,bi,bj) |
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mask_uice=HEFFM(i,j,bi,bj)+HEFFM(i-1,j ,bi,bj) |
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IF ( (seaiceMaskU(I,J,bi,bj) .GT. 0. _d 0) .AND. |
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& (mask_uice .GT. 1.5 _d 0) ) THEN |
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seaiceMaskU(I,J,bi,bj) = 1. _d 0 |
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ELSE |
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seaiceMaskU(I,J,bi,bj) = 0. _d 0 |
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ENDIF |
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seaiceMaskV(I,J,bi,bj)=AREA(i,j,bi,bj)+AREA(I,J-1,bi,bj) |
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mask_vice=HEFFM(i,j,bi,bj)+HEFFM(i ,j-1,bi,bj) |
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IF ( (seaiceMaskV(I,J,bi,bj) .GT. 0. _d 0) .AND. |
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& (mask_vice .GT. 1.5 _d 0) ) THEN |
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seaiceMaskV(I,J,bi,bj) = 1. _d 0 |
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ELSE |
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seaiceMaskV(I,J,bi,bj) = 0. _d 0 |
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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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CALL EXCH_UV_XY_RL( seaiceMaskU, seaiceMaskV, .FALSE., myThid ) |
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ENDIF |
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#endif /* ndef ALLOW_AUTODIFF_TAMC */ |
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|
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C-- NOW SET UP FORCING FIELDS |
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|
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C initialise fields |
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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 j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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TAUX (I,J,bi,bj)= 0. _d 0 |
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TAUY (I,J,bi,bj)= 0. _d 0 |
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#ifdef ALLOW_AUTODIFF_TAMC |
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# ifdef SEAICE_ALLOW_EVP |
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stressDivergenceX(I,J,bi,bj) = 0. _d 0 |
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stressDivergenceY(I,J,bi,bj) = 0. _d 0 |
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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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|
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# ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE uice = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE vice = comlev1, key=ikey_dynamics, kind=isbyte |
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# endif /* ALLOW_AUTODIFF_TAMC */ |
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C-- interface of dynamics with atmopheric forcing fields (wind/stress) |
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CALL SEAICE_GET_DYNFORCING ( |
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I uIce, vIce, |
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O TAUX, TAUY, |
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I myTime, myIter, myThid ) |
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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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C-- Compute surface pressure at z==0: |
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C- use actual sea surface height for tilt computations |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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phiSurf(i,j) = Bo_surf(i,j,bi,bj)*etaN(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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#ifdef ATMOSPHERIC_LOADING |
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C- add atmospheric loading and Sea-Ice loading |
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IF ( useRealFreshWaterFlux ) THEN |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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phiSurf(i,j) = phiSurf(i,j) |
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& + ( pload(i,j,bi,bj) |
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& +sIceLoad(i,j,bi,bj)*gravity |
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& )*recip_rhoConst |
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ENDDO |
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ENDDO |
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ELSE |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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phiSurf(i,j) = phiSurf(i,j) |
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& + pload(i,j,bi,bj)*recip_rhoConst |
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ENDDO |
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ENDDO |
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ENDIF |
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#endif /* ATMOSPHERIC_LOADING */ |
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DO j=1-OLy+1,sNy+OLy |
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DO i=1-OLx+1,sNx+OLx |
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C-- basic forcing by wind stress |
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FORCEX0(I,J,bi,bj)=TAUX(I,J,bi,bj) |
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FORCEY0(I,J,bi,bj)=TAUY(I,J,bi,bj) |
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ENDDO |
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ENDDO |
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|
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IF ( SEAICEuseTILT ) then |
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DO j=1-OLy+1,sNy+OLy |
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DO i=1-OLx+1,sNx+OLx |
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C-- now add in tilt |
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FORCEX0(I,J,bi,bj)=FORCEX0(I,J,bi,bj) |
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& -seaiceMassU(I,J,bi,bj)*_recip_dxC(I,J,bi,bj) |
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& *( phiSurf(i,j)-phiSurf(i-1,j) ) |
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FORCEY0(I,J,bi,bj)=FORCEY0(I,J,bi,bj) |
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& -seaiceMassV(I,J,bi,bj)* _recip_dyC(I,J,bi,bj) |
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& *( phiSurf(i,j)-phiSurf(i,j-1) ) |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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CALL SEAICE_CALC_ICE_STRENGTH( bi, bj, myTime, myIter, myThid ) |
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|
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ENDDO |
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ENDDO |
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|
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#ifdef SEAICE_ALLOW_DYNAMICS |
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IF ( SEAICEuseDYNAMICS ) THEN |
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|
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#ifdef SEAICE_ALLOW_FREEDRIFT |
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IF ( SEAICEuseFREEDRIFT .OR. SEAICEuseEVP |
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& .OR. LSR_mixIniGuess.EQ.0 ) THEN |
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CALL SEAICE_FREEDRIFT( myTime, myIter, myThid ) |
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ENDIF |
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IF ( SEAICEuseFREEDRIFT ) THEN |
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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 j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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uIce(i,j,bi,bj) = uIce_fd(i,j,bi,bj) |
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vIce(i,j,bi,bj) = vIce_fd(i,j,bi,bj) |
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stressDivergenceX(i,j,bi,bj) = 0. _d 0 |
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stressDivergenceY(i,j,bi,bj) = 0. _d 0 |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDIF |
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#endif /* SEAICE_ALLOW_FREEDRIFT */ |
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|
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#ifdef ALLOW_OBCS |
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IF ( useOBCS ) THEN |
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CALL OBCS_APPLY_UVICE( uIce, vIce, myThid ) |
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ENDIF |
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#endif /* ALLOW_OBCS */ |
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|
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#ifdef SEAICE_ALLOW_EVP |
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# ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE uice = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE vice = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE uicenm1 = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE vicenm1 = comlev1, key=ikey_dynamics, kind=isbyte |
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# endif /* ALLOW_AUTODIFF_TAMC */ |
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IF ( SEAICEuseEVP ) THEN |
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C Elastic-Viscous-Plastic solver, following Hunke (2001) |
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CALL SEAICE_EVP( myTime, myIter, myThid ) |
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ENDIF |
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#endif /* SEAICE_ALLOW_EVP */ |
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|
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#ifdef SEAICE_ALLOW_JFNK |
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IF ( SEAICEuseJFNK ) THEN |
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# ifdef ALLOW_AUTODIFF_TAMC |
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STOP 'Adjoint does not work with JFNK solver.' |
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# else |
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C Jacobian-free Newton Krylov solver (Lemieux et al. 2010, 2012) |
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CALL SEAICE_JFNK( myTime, myIter, myThid ) |
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# endif /* ALLOW_AUTODIFF_TAMC */ |
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ENDIF |
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#endif /* SEAICE_ALLOW_JFNK */ |
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|
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#if defined(SEAICE_ALLOW_EVP) || defined(SEAICE_ALLOW_JFNK) \ |
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|| defined(SEAICE_ALLOW_FREEDRIFT) |
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IF ( .NOT.SEAICEuseFREEDRIFT .AND. .NOT.SEAICEuseEVP |
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& .AND. .NOT.SEAICEuseJFNK ) THEN |
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#endif /* SEAICE_ALLOW_EVP or SEAICE_ALLOW_FREEDRIFT */ |
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C LSR scheme (Zhang-J/Hibler 1997), ported to a C-grid |
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CALL SEAICE_LSR( myTime, myIter, myThid ) |
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#if defined(SEAICE_ALLOW_EVP) || defined(SEAICE_ALLOW_JFNK) \ |
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|| defined(SEAICE_ALLOW_FREEDRIFT) |
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ENDIF |
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#endif /* SEAICE_ALLOW_EVP or SEAICE_ALLOW_FREEDRIFT */ |
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|
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C End of IF (SEAICEuseDYNAMICS ... |
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ENDIF |
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#endif /* SEAICE_ALLOW_DYNAMICS */ |
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|
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C End of IF (DIFFERENT_MULTIPLE ... |
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ENDIF |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE uice = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE vice = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE stressDivergenceX = comlev1, |
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CADJ & key=ikey_dynamics, kind=isbyte |
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CADJ STORE stressDivergenceY = comlev1, |
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CADJ & key=ikey_dynamics, kind=isbyte |
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CADJ STORE DWATN = comlev1, key=ikey_dynamics, kind=isbyte |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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|
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C Calculate ocean surface stress |
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CALL SEAICE_OCEAN_STRESS ( myTime, myIter, myThid ) |
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|
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#ifdef SEAICE_ALLOW_DYNAMICS |
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#ifdef SEAICE_ALLOW_CLIPVELS |
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IF ( SEAICEuseDYNAMICS .AND. SEAICE_clipVelocities) THEN |
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE uice = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE vice = comlev1, key=ikey_dynamics, kind=isbyte |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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c Put a cap on ice velocity |
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c limit velocity to 0.40 m s-1 to avoid potential CFL violations |
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c in open water areas (drift of zero thickness ice) |
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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 j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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uIce(i,j,bi,bj)= |
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& MAX(MIN(uIce(i,j,bi,bj),0.40 _d +00),-0.40 _d +00) |
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vIce(i,j,bi,bj)= |
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& MAX(MIN(vIce(i,j,bi,bj),0.40 _d +00),-0.40 _d +00) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDIF |
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#endif /* SEAICE_ALLOW_CLIPVELS */ |
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#endif /* SEAICE_ALLOW_DYNAMICS */ |
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|
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#endif /* SEAICE_CGRID */ |
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RETURN |
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END |
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