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C $Header: /u/gcmpack/MITgcm/model/src/calc_common_factors.F,v 1.21 2006/06/18 23:20:35 jmc 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: CALC_COMMON_FACTORS |
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C !INTERFACE: |
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SUBROUTINE CALC_COMMON_FACTORS( |
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I uVel, vVel, |
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O uFld, vFld, uTrans, vTrans, xA, yA, |
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I k,bi,bj, myThid ) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | SUBROUTINE CALC_COMMON_FACTORS |
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C | o Calculate common data (such as volume flux) for use |
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C | by "Right hand side" subroutines. |
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C *==========================================================* |
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C | Here, we calculate terms or spatially varying factors |
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C | that are used at various points in the "RHS" subroutines. |
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C | This reduces the amount of total work, total memory |
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C | and therefore execution time and is generally a good |
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C | idea. |
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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 "GRID.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 uVel :: velocity, zonal component |
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C vVel :: velocity, meridional component |
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C uFld :: 2-D local copy of horizontal velocity, zonal component |
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C vFld :: 2-D local copy of horizontal velocity, merid. component |
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C uTrans :: Zonal volume transport through cell face |
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C vTrans :: Meridional volume transport through cell face |
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C xA :: Tracer cell face area normal to X |
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C yA :: Tracer cell face area normal to X |
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C k,bi,bj :: vertical & tile indices for this calculation |
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C myThid :: my Thread Id. number |
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|
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_RL uVel (1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr,nSx,nSy) |
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_RL vVel (1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr,nSx,nSy) |
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_RL uFld (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL vFld (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL uTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL vTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RS xA (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RS yA (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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INTEGER k,bi,bj |
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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 i, j :: Loop counters |
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INTEGER i,j |
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CEOP |
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|
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C-- Initialisation |
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c DO j=1-OLy,sNy+OLy |
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c DO i=1-OLx,sNx+OLx |
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c xA(i,j) = 0. _d 0 |
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c yA(i,j) = 0. _d 0 |
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c uFld(i,j) = 0. _d 0 |
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c vFld(i,j) = 0. _d 0 |
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c uTrans(i,j) = 0. _d 0 |
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c vTrans(i,j) = 0. _d 0 |
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c ENDDO |
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c ENDDO |
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|
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C-- Calculate tracer cell face open areas |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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xA(i,j) = _dyG(i,j,bi,bj)*deepFacC(k) |
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& *drF(k)*_hFacW(i,j,k,bi,bj) |
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yA(i,j) = _dxG(i,j,bi,bj)*deepFacC(k) |
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& *drF(k)*_hFacS(i,j,k,bi,bj) |
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ENDDO |
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ENDDO |
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|
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C-- Make a local copy of velocity component : |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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uFld(i,j) = uVel(i,j,k,bi,bj) |
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vFld(i,j) = vVel(i,j,k,bi,bj) |
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ENDDO |
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ENDDO |
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|
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C-- Calculate "volume transports" through tracer cell faces. |
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C anelastic: scaled by rhoFacC (~ mass transport) |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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uTrans(i,j) = uFld(i,j)*xA(i,j)*rhoFacC(k) |
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vTrans(i,j) = vFld(i,j)*yA(i,j)*rhoFacC(k) |
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ENDDO |
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ENDDO |
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|
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RETURN |
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END |
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