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C $Header: /u/gcmpack/MITgcm/model/src/ini_pressure.F,v 1.6 2003/10/09 04:19:18 edhill Exp $ |
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C $Name: $ |
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|
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#include "CPP_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: INI_PRESSURE |
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C !INTERFACE: |
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SUBROUTINE INI_PRESSURE( myThid ) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | SUBROUTINE INI_PRESSURE |
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C | o initialise the pressure field consistently with |
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C | temperature and salinity |
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C | - needs to be called after ini_theta, ini_salt, and |
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C | ini_psurf |
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C | - does not include surface pressure loading, because |
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C | that is only available until after |
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C | CALL packages_init_variables |
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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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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 "EOS.h" |
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#include "GRID.h" |
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#include "DYNVARS.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 of INI_PRESSURE |
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INTEGER myThid |
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|
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C !LOCAL VARIABLES: |
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C == Local variables == |
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C dPhiHydX,Y :: Gradient (X & Y directions) of Hyd. Potential |
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C bi,bj - Loop counters |
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C I,J,K |
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INTEGER bi, bj |
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INTEGER I, J, K |
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INTEGER iMin, iMax, jMin, jMax, npiter |
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_RL PhiHydF (1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL PhiHydC (1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL dPhiHydX(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL dPhiHydY(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL oldPhi (1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL count, rmspp, rmsppold |
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|
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CHARACTER*(MAX_LEN_MBUF) msgBuf |
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CEOP |
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iMin = 1-OLx |
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iMax = sNx+OLx |
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jMin = 1-OLy |
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jMax = sNy+OLy |
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|
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WRITE(msgBuf,'(a)') |
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& 'Start initial hydrostatic pressure computation' |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , 1) |
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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 = 1,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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totPhiHyd(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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ENDDO |
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ENDDO |
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|
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IF ( useDynP_inEos_Zc ) THEN |
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|
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#ifndef ALLOW_AUTODIFF_TAMC |
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cph-- deal with this iterative loop for AD once it will |
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cph-- really be needed; |
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cph-- would need storing of totPhiHyd for each npiter |
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|
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rmspp = 1. _d 0 |
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rmsppold = 0. _d 0 |
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npiter = 0 |
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|
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C iterate pressure p = integral of (g*rho(p)*dz) |
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DO npiter= 1, 15 |
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rmsppold = rmspp |
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rmspp = 0. _d 0 |
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count = 0. |
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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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phiHydF(i,j) = 0. _d 0 |
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ENDDO |
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ENDDO |
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DO k = 1, Nr |
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C for each level save old pressure and compute new pressure |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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oldPhi(i,j) = totPhiHyd(i,j,k,bi,bj) |
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ENDDO |
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ENDDO |
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CALL CALC_PHI_HYD( |
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I bi, bj, iMin, iMax, jMin, jMax, k, |
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I theta, salt, |
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U phiHydF, |
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O phiHydC, dPhiHydX, dPhiHydY, |
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I startTime, nIter0, myThid) |
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C compute convergence criterion |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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rmspp = rmspp |
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& + (totPhiHyd(i,j,k,bi,bj)-oldPhi(i,j))**2 |
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count = count + maskC(i,j,k,bi,bj) |
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ENDDO |
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ENDDO |
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C -- end k loop |
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ENDDO |
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ENDDO |
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ENDDO |
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Cml WRITE(msgBuf,'(I10.10)') npiter |
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Cml CALL WRITE_FLD_XYZ_RL( 'POLD.',msgBuf,pold,npiter,myThid) |
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Cml CALL WRITE_FLD_XYZ_RL( 'PINI.',msgBuf,pressure,npiter,myThid) |
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_GLOBAL_SUM_R8( rmspp, myThid ) |
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_GLOBAL_SUM_R8( count, myThid ) |
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IF ( count .EQ. 0. ) THEN |
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rmspp = 0. _d 0 |
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ELSE |
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rmspp = sqrt(rmspp/count) |
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ENDIF |
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WRITE(msgBuf,'(a,i2,a,e20.13)') |
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& 'Iteration ', npiter, ', RMS-difference = ', rmspp |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , 1) |
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|
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C -- end npiter loop |
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ENDDO |
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C print some diagnostics |
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IF ( rmspp .ne. 0. ) THEN |
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IF ( rmspp .EQ. rmsppold ) THEN |
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WRITE(msgBuf,'(A)') |
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& 'Initial hydrostatic pressure did not converge perfectly,' |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , 1) |
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WRITE(msgBuf,'(A)') |
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& 'but the RMS-difference is constant, indicating that the' |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , 1) |
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WRITE(msgBuf,'(A)') |
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& 'algorithm converged within machine precision.' |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , 1) |
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ELSE |
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WRITE(msgBuf,'(A,I2,A)') |
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& 'Initial hydrostatic pressure did not converge after ', |
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& npiter-1, ' steps' |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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STOP 'ABNORMAL END: S/R INI_PRESSURE' |
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ENDIF |
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ENDIF |
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WRITE(msgBuf,'(A)') |
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& 'Initial hydrostatic pressure converged.' |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , 1) |
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|
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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|
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c-- else of if useDynP_inEos_Zc |
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ELSE |
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C print a message and DO nothing |
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WRITE(msgBuf,'(A,A)') |
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& 'Pressure is predetermined for buoyancyRelation ', |
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& buoyancyRelation(1:11) |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , 1) |
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|
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ENDIF |
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|
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WRITE(msgBuf,'(A)') ' ' |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , 1) |
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|
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RETURN |
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END |
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