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C $Header: /u/gcmpack/models/MITgcmUV/model/src/the_correction_step.F,v 1.9 2001/05/29 14:01:37 adcroft Exp $ |
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C Tag $Name: $ |
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|
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#include "CPP_OPTIONS.h" |
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c #undef ALLOW_ZONAL_FILT |
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c #undef ALLOW_SHAP_FILT |
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|
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SUBROUTINE THE_CORRECTION_STEP(myTime, myIter, myThid) |
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C /==========================================================\ |
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C | SUBROUTINE THE_CORRECTION_STEP | |
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C |==========================================================| |
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C |part1: update U,V,T,S | |
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C | U*,V* (contained in gUnm1,gVnm1) have the surface | |
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C | pressure gradient term added and the result stored | |
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C | in U,V (contained in uVel, vVel) | |
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C | T* (contained in gTnm1) is copied to T (theta) | |
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C | S* (contained in gSnm1) is copied to S (salt) | |
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C | | |
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C |part2: Adjustments. | |
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C | o Filter U,V,T,S (Shapiro Filter, Zonal_Filter) | |
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C | o Convective Adjustment | |
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C | o Compute again Eta (exact volume conservation) | |
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C | o Diagmnostic of state variables (Time average) | |
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C \==========================================================/ |
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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 "DYNVARS.h" |
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|
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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 /* ALLOW_AUTODIFF_TAMC */ |
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|
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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 number for this instance of the routine. |
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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|
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C == Local variables |
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_RL phiSurfX(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL phiSurfY(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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INTEGER iMin,iMax |
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INTEGER jMin,jMax |
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INTEGER bi,bj |
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INTEGER k,i,j |
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|
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C--- 1rst Part : Update U,V,T,S. |
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C |
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C The arrays used for time stepping are cycled. |
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C Tracers: |
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C T(n) = Gt(n-1) |
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C Gt(n-1) = Gt(n) |
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C Momentum: |
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C V(n) = Gv(n-1) - dt * grad Eta |
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C Gv(n-1) = Gv(n) |
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C |
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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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|
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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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|
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act2 = bj - myByLo(myThid) |
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max2 = myByHi(myThid) - myByLo(myThid) + 1 |
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|
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act3 = myThid - 1 |
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max3 = nTx*nTy |
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|
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act4 = ikey_dynamics - 1 |
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|
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ikey = (act1 + 1) + act2*max1 |
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& + act3*max1*max2 |
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& + act4*max1*max2*max3 |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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|
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C-- Set up work arrays that need valid initial values |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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phiSurfX(i,j)=0. |
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phiSurfY(i,j)=0. |
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ENDDO |
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ENDDO |
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|
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C Loop range: Gradients of Eta are evaluated so valid |
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C range is all but first row and column in overlaps. |
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iMin = 1-OLx+1 |
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iMax = sNx+OLx |
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jMin = 1-OLy+1 |
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jMax = sNy+OLy |
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|
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C- Calculate gradient of surface Potentiel |
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CALL CALC_GRAD_PHI_SURF( |
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I bi,bj,iMin,iMax,jMin,jMax, |
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I etaN, |
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O phiSurfX,phiSurfY, |
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I myThid ) |
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|
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C-- Loop over all layers, top to bottom |
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DO K=1,Nr |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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kkey = (ikey-1)*Nr + k |
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#endif |
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|
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C- Update velocity fields: V(n) = V** - dt * grad Eta |
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IF (momStepping) |
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& CALL CORRECTION_STEP( |
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I bi,bj,iMin,iMax,jMin,jMax,K, |
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I phiSurfX,phiSurfY,myTime,myThid ) |
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|
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C- Update tracer fields: T(n) = T**, Gt(n-1) = Gt(n) |
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IF (tempStepping) |
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& CALL CYCLE_TRACER( |
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I bi,bj,iMin,iMax,jMin,jMax,K, |
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U theta,gT,gTNm1, |
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I myTime,myThid ) |
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IF (saltStepping) |
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& CALL CYCLE_TRACER( |
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I bi,bj,iMin,iMax,jMin,jMax,K, |
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U salt,gS,gSNm1, |
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I myTime,myThid ) |
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|
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#ifdef ALLOW_OBCS |
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE uvel (:,:,k,bi,bj) = comlev1_bibj_k, key=kkey, byte=isbyte |
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CADJ STORE vvel (:,:,k,bi,bj) = comlev1_bibj_k, key=kkey, byte=isbyte |
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CADJ STORE theta(:,:,k,bi,bj) = comlev1_bibj_k, key=kkey, byte=isbyte |
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CADJ STORE salt (:,:,k,bi,bj) = comlev1_bibj_k, key=kkey, byte=isbyte |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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IF (useOBCS) THEN |
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CALL OBCS_APPLY_UV(bi,bj,K,uVel,vVel,myThid) |
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ENDIF |
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#endif /* ALLOW_OBCS */ |
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|
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C-- End DO K=1,Nr |
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ENDDO |
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|
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C-- End of 1rst bi,bj loop |
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ENDDO |
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ENDDO |
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|
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C--- 2nd Part : Adjustment. |
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C |
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C Static stability is calculated and the tracers are |
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C convective adjusted where statically unstable. |
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|
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#ifdef ALLOW_SHAP_FILT |
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IF (useSHAP_FILT) THEN |
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C-- Filter (and exchange). |
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CALL SHAP_FILT_APPLY( |
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I uVel, vVel, theta, salt, |
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I myTime, myIter, myThid ) |
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ENDIF |
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#endif |
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|
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#ifdef ALLOW_ZONAL_FILT |
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IF (zonal_filt_lat.LT.90.) THEN |
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CALL ZONAL_FILT_APPLY( |
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U uVel, vVel, theta, salt, |
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I myThid ) |
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ENDIF |
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#endif |
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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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|
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C-- Convectively adjust new fields to be statically stable |
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iMin = 1-OLx+1 |
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iMax = sNx+OLx |
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jMin = 1-OLy+1 |
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jMax = sNy+OLy |
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CALL CONVECTIVE_ADJUSTMENT( |
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I bi, bj, iMin, iMax, jMin, jMax, |
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I myTime, myIter, myThid ) |
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|
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#ifdef EXACT_CONSERV |
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IF (exactConserv) THEN |
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C-- Compute again "eta" to satisfy exactly the total Volume Conservation : |
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CALL CALC_EXACT_ETA( bi,bj, uVel,vVel, |
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I myTime, myIter, myThid ) |
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ENDIF |
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#endif /* EXACT_CONSERV */ |
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|
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#ifdef ALLOW_TIMEAVE |
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IF (taveFreq.GT.0.) THEN |
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CALL TIMEAVE_STATVARS(myTime, myIter, bi, bj, myThid) |
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ENDIF |
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#endif /* ALLOW_TIMEAVE */ |
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|
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C-- End of 2nd bi,bj loop |
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ENDDO |
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ENDDO |
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|
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#ifdef EXACT_CONSERV |
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IF (exactConserv) _EXCH_XY_R8(etaN, myThid ) |
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#endif /* EXACT_CONSERV */ |
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|
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RETURN |
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END |
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