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jscott |
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C $Header: /u/gcmpack/MITgcm/model/src/calc_gs.F,v 1.47 2006/06/18 23:22:43 jmc Exp $ |
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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: CALC_GS |
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C !INTERFACE: |
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SUBROUTINE CALC_GS( |
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I bi,bj,iMin,iMax,jMin,jMax,k,kM1,kUp,kDown, |
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I xA, yA, maskUp, uFld, vFld, wFld, |
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I uTrans, vTrans, rTrans, rTransKp1, |
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I KappaRS, diffKh3d_x, diffKh3d_y, |
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U fVerS, |
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I myTime,myIter,myThid ) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | SUBROUTINE CALC_GS |
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C | o Calculate the salt tendency terms. |
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C *==========================================================* |
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C | A procedure called EXTERNAL_FORCING_S is called from |
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C | here. These procedures can be used to add per problem |
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C | E-P flux source terms. |
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C | Note: Although it is slightly counter-intuitive the |
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C | EXTERNAL_FORCING routine is not the place to put |
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C | file I/O. Instead files that are required to |
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C | calculate the external source terms are generally |
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C | read during the model main loop. This makes the |
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C | logisitics of multi-processing simpler and also |
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C | makes the adjoint generation simpler. It also |
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C | allows for I/O to overlap computation where that |
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C | is supported by hardware. |
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C | Aside from the problem specific term the code here |
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C | forms the tendency terms due to advection and mixing |
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C | The baseline implementation here uses a centered |
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C | difference form for the advection term and a tensorial |
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C | divergence of a flux form for the diffusive term. The |
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C | diffusive term is formulated so that isopycnal mixing and |
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C | GM-style subgrid-scale terms can be incorporated b simply |
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C | setting the diffusion tensor terms appropriately. |
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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 "DYNVARS.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#ifdef ALLOW_GENERIC_ADVDIFF |
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#include "GAD.h" |
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#endif |
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#ifdef ALLOW_AUTODIFF_TAMC |
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# include "tamc.h" |
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# include "tamc_keys.h" |
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#endif |
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C !INPUT/OUTPUT PARAMETERS: |
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C == Routine arguments == |
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C bi, bj, :: tile indices |
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C iMin,iMax, jMin,jMax :: Range of points for which calculation |
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C results will be set. |
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C k :: vertical index |
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C kM1 :: =k-1 for k>1, =1 for k=1 |
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C kUp :: index into 2 1/2D array, toggles between 1|2 |
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C kDown :: index into 2 1/2D array, toggles between 2|1 |
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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 maskUp :: Land mask used to denote base of the domain. |
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C uFld,vFld :: Local copy of horizontal velocity field |
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C wFld :: Local copy of vertical velocity field |
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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 rTrans :: Vertical volume transport at interface k |
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C rTransKp1 :: Vertical volume transport at inteface k+1 |
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C KappaRS :: Vertical diffusion for Salinity |
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C fVerS :: Flux of salt (S) in the vertical direction |
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C at the upper(U) and lower(D) faces of a cell. |
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C myTime :: current time |
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C myIter :: current iteration number |
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C myThid :: my Thread Id. number |
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INTEGER bi,bj,iMin,iMax,jMin,jMax |
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INTEGER k,kUp,kDown,kM1 |
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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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_RS maskUp (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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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 wFld (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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_RL rTrans (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL rTransKp1(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL KappaRS(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL diffKh3d_x(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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_RL diffKh3d_y(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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_RL fVerS (1-OLx:sNx+OLx,1-OLy:sNy+OLy,2) |
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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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#ifdef ALLOW_GENERIC_ADVDIFF |
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C === Local variables === |
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LOGICAL calcAdvection |
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INTEGER iterNb |
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#ifdef ALLOW_ADAMSBASHFORTH_3 |
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INTEGER m1, m2 |
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#endif |
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#ifdef ALLOW_AUTODIFF_TAMC |
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act1 = bi - myBxLo(myThid) |
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max1 = myBxHi(myThid) - myBxLo(myThid) + 1 |
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act2 = bj - myByLo(myThid) |
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max2 = myByHi(myThid) - myByLo(myThid) + 1 |
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act3 = myThid - 1 |
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max3 = nTx*nTy |
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act4 = ikey_dynamics - 1 |
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itdkey = (act1 + 1) + act2*max1 |
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& + act3*max1*max2 |
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& + act4*max1*max2*max3 |
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kkey = (itdkey-1)*Nr + k |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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#ifdef ALLOW_AUTODIFF_TAMC |
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C-- only the kUp part of fverS is set in this subroutine |
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C-- the kDown is still required |
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fVerS(1,1,kDown) = fVerS(1,1,kDown) |
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# ifdef NONLIN_FRSURF |
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CADJ STORE fVerS(:,:,:) = |
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CADJ & comlev1_bibj_k, key=kkey, byte=isbyte |
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CADJ STORE gsNm1(:,:,k,bi,bj) = |
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CADJ & comlev1_bibj_k, key=kkey, byte=isbyte |
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# endif |
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#endif |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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calcAdvection = saltAdvection .AND. .NOT.saltMultiDimAdvec |
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iterNb = myIter |
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IF (staggerTimeStep) iterNb = myIter - 1 |
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#ifdef ALLOW_ADAMSBASHFORTH_3 |
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m1 = 1 + MOD(iterNb+1,2) |
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m2 = 1 + MOD( iterNb ,2) |
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CALL GAD_CALC_RHS( |
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I bi,bj,iMin,iMax,jMin,jMax,k,kM1,kUp,kDown, |
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I xA, yA, maskUp, uFld, vFld, wFld, |
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I uTrans, vTrans, rTrans, rTransKp1, |
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I diffKhS, diffK4S, KappaRS, |
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I gsNm(1-Olx,1-Oly,1,1,1,m2), salt, |
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I GAD_SALINITY, saltAdvScheme, saltVertAdvScheme, |
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I calcAdvection, saltImplVertAdv, AdamsBashforth_S, |
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U fVerS, gS, |
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I myTime, myIter, myThid ) |
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#else /* ALLOW_ADAMSBASHFORTH_3 */ |
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CALL GAD_CALC_RHS_RAF( |
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I bi,bj,iMin,iMax,jMin,jMax,k,kM1,kUp,kDown, |
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I xA, yA, maskUp, uFld, vFld, wFld, |
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I uTrans, vTrans, rTrans, rTransKp1, |
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I diffKh3d_x, diffKh3d_y, |
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I diffK4S, KappaRS, gsNm1, salt, |
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I GAD_SALINITY, saltAdvScheme, saltVertAdvScheme, |
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I calcAdvection, saltImplVertAdv, AdamsBashforth_S, |
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U fVerS, gS, |
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I myTime, myIter, myThid ) |
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#endif /* ALLOW_ADAMSBASHFORTH_3 */ |
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C-- External salinity forcing term(s) inside Adams-Bashforth: |
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IF ( saltForcing .AND. tracForcingOutAB.NE.1 ) |
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& CALL EXTERNAL_FORCING_S( |
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I iMin,iMax,jMin,jMax,bi,bj,k, |
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I myTime,myThid) |
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IF ( AdamsBashforthGs ) THEN |
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#ifdef ALLOW_ADAMSBASHFORTH_3 |
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CALL ADAMS_BASHFORTH3( |
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I bi, bj, k, |
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U gS, gsNm, |
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I saltStartAB, iterNb, myThid ) |
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#else |
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CALL ADAMS_BASHFORTH2( |
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I bi, bj, k, |
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U gS, gsNm1, |
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I iterNb, myThid ) |
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#endif |
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ENDIF |
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C-- External salinity forcing term(s) outside Adams-Bashforth: |
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IF ( saltForcing .AND. tracForcingOutAB.EQ.1 ) |
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& CALL EXTERNAL_FORCING_S( |
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I iMin,iMax,jMin,jMax,bi,bj,k, |
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I myTime,myThid) |
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#ifdef NONLIN_FRSURF |
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IF (nonlinFreeSurf.GT.0) THEN |
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CALL FREESURF_RESCALE_G( |
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I bi, bj, k, |
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U gS, |
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I myThid ) |
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IF ( AdamsBashforthGs ) THEN |
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#ifdef ALLOW_ADAMSBASHFORTH_3 |
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CALL FREESURF_RESCALE_G( |
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I bi, bj, k, |
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U gsNm(1-OLx,1-OLy,1,1,1,1), |
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I myThid ) |
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CALL FREESURF_RESCALE_G( |
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I bi, bj, k, |
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U gsNm(1-OLx,1-OLy,1,1,1,2), |
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I myThid ) |
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#else |
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CALL FREESURF_RESCALE_G( |
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I bi, bj, k, |
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U gsNm1, |
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I myThid ) |
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#endif |
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ENDIF |
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ENDIF |
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#endif /* NONLIN_FRSURF */ |
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#endif /* ALLOW_GENERIC_ADVDIFF */ |
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RETURN |
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END |
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