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C $Header: /u/gcmpack/models/MITgcmUV/model/src/dynamics.F,v 1.4 1998/04/30 14:03:28 adcroft Exp $ |
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#include "CPP_EEOPTIONS.h" |
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SUBROUTINE DYNAMICS(myThid) |
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C /==========================================================\ |
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C | SUBROUTINE DYNAMICS | |
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C | o Controlling routine for the explicit part of the model | |
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C | dynamics. | |
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C |==========================================================| |
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C | This routine evaluates the "dynamics" terms for each | |
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C | block of ocean in turn. Because the blocks of ocean have | |
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C | overlap regions they are independent of one another. | |
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C | If terms involving lateral integrals are needed in this | |
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C | routine care will be needed. Similarly finite-difference | |
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C | operations with stencils wider than the overlap region | |
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C | require special consideration. | |
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C | Notes | |
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C | ===== | |
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C | C*P* comments indicating place holders for which code is | |
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C | presently being developed. | |
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C \==========================================================/ |
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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 "CG2D.h" |
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#include "DYNVARS.h" |
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C == Routine arguments == |
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C myThid - Thread number for this instance of the routine. |
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INTEGER myThid |
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C == Local variables |
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C xA, yA - Per block temporaries holding face areas |
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C uTrans, vTrans, wTrans - Per block temporaries holding flow transport |
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C o uTrans: Zonal transport |
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C o vTrans: Meridional transport |
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C o wTrans: Vertical transport |
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C maskC,maskUp o maskC: land/water mask for tracer cells |
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C o maskUp: land/water mask for W points |
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C aTerm, xTerm, cTerm - Work arrays for holding separate terms in |
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C mTerm, pTerm, tendency equations. |
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C fZon, fMer, fVer[STUV] o aTerm: Advection term |
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C o xTerm: Mixing term |
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C o cTerm: Coriolis term |
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C o mTerm: Metric term |
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C o pTerm: Pressure term |
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C o fZon: Zonal flux term |
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C o fMer: Meridional flux term |
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C o fVer: Vertical flux term - note fVer |
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C is "pipelined" in the vertical |
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C so we need an fVer for each |
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C variable. |
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C iMin, iMax - Ranges and sub-block indices on which calculations |
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C jMin, jMax are applied. |
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C bi, bj |
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C k, kUp, kDown, kM1 - Index for layer above and below. kUp and kDown |
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C are switched with layer to be the appropriate index |
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C into fVerTerm |
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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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_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 wTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RS maskC (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 aTerm (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL xTerm (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL cTerm (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL mTerm (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL pTerm (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL fZon (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL fMer (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL fVerT (1-OLx:sNx+OLx,1-OLy:sNy+OLy,2) |
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_RL fVerS (1-OLx:sNx+OLx,1-OLy:sNy+OLy,2) |
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_RL fVerU (1-OLx:sNx+OLx,1-OLy:sNy+OLy,2) |
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_RL fVerV (1-OLx:sNx+OLx,1-OLy:sNy+OLy,2) |
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_RL pH (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nz) |
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_RL rhokm1(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL rhokp1(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL pSurfX(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL pSurfY(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 i, j |
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INTEGER k, kM1, kUp, kDown |
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C-- Set up work arrays with valid (i.e. not NaN) values |
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C These inital values do not alter the numerical results. They |
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C just ensure that all memory references are to valid floating |
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C point numbers. This prevents spurious hardware signals due to |
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C uninitialised but inert locations. |
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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) = 0. _d 0 |
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yA(i,j) = 0. _d 0 |
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uTrans(i,j) = 0. _d 0 |
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vTrans(i,j) = 0. _d 0 |
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aTerm(i,j) = 0. _d 0 |
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xTerm(i,j) = 0. _d 0 |
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cTerm(i,j) = 0. _d 0 |
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mTerm(i,j) = 0. _d 0 |
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pTerm(i,j) = 0. _d 0 |
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fZon(i,j) = 0. _d 0 |
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fMer(i,j) = 0. _d 0 |
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DO K=1,nZ |
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pH (i,j,k) = 0. _d 0 |
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ENDDO |
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rhokm1(i,j) = 0. _d 0 |
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rhokp1(i,j) = 0. _d 0 |
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ENDDO |
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ENDDO |
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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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wTrans(i,j) = 0. _d 0 |
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fVerT(i,j,1) = 0. _d 0 |
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fVerT(i,j,2) = 0. _d 0 |
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fVerS(i,j,1) = 0. _d 0 |
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fVerS(i,j,2) = 0. _d 0 |
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fVerU(i,j,1) = 0. _d 0 |
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fVerU(i,j,2) = 0. _d 0 |
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fVerV(i,j,1) = 0. _d 0 |
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fVerV(i,j,2) = 0. _d 0 |
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ENDDO |
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ENDDO |
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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-- Boundary condition on hydrostatic pressure is pH(z=0)=0 |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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pH(i,j,1) = 0. _d 0 |
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ENDDO |
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ENDDO |
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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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C-- Calculate gradient of surface pressure |
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CALL GRAD_PSURF( |
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I bi,bj,iMin,iMax,jMin,jMax, |
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O pSurfX,pSurfY, |
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I myThid) |
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C-- Update fields in top level according to tendency terms |
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CALL TIMESTEP( |
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I bi,bj,iMin,iMax,jMin,jMax,1,pSurfX,pSurfY,myThid) |
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C Density of 1st level (below W(1)) reference to level 1 |
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CALL FIND_RHO( |
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I bi, bj, iMin, iMax, jMin, jMax, 1, 1, 'LINEAR', |
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O rhoKm1, |
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I myThid ) |
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C-- Integrate hydrostatic balance for pH with BC of pH(z=0)=0 |
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CALL CALC_PH( |
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I bi,bj,iMin,iMax,jMin,jMax,1,rhoKm1,rhoKm1, |
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U pH, |
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I myThid ) |
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DO K=2,Nz |
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C-- Update fields in Kth level according to tendency terms |
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CALL TIMESTEP( |
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I bi,bj,iMin,iMax,jMin,jMax,K,pSurfX,pSurfY,myThid) |
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C Density of K-1 level (above W(K)) reference to K level |
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CALL FIND_RHO( |
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I bi, bj, iMin, iMax, jMin, jMax, K-1, K, 'LINEAR', |
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O rhoKm1, |
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I myThid ) |
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C Density of K level (below W(K)) reference to K level |
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CALL FIND_RHO( |
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I bi, bj, iMin, iMax, jMin, jMax, K, K, 'LINEAR', |
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O rhoKp1, |
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I myThid ) |
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C-- Calculate static stability and mix where convectively unstable |
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CALL CONVECT( |
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I bi,bj,iMin,iMax,jMin,jMax,K,rhoKm1,rhoKp1,myThid) |
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C Density of K-1 level (above W(K)) reference to K-1 level |
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CALL FIND_RHO( |
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I bi, bj, iMin, iMax, jMin, jMax, K-1, K-1, 'LINEAR', |
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O rhoKm1, |
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I myThid ) |
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C Density of K level (below W(K)) referenced to K level |
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CALL FIND_RHO( |
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I bi, bj, iMin, iMax, jMin, jMax, K, K, 'LINEAR', |
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O rhoKp1, |
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I myThid ) |
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C-- Integrate hydrostatic balance for pH with BC of pH(z=0)=0 |
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CALL CALC_PH( |
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I bi,bj,iMin,iMax,jMin,jMax,K,rhoKm1,rhoKp1, |
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U pH, |
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I myThid ) |
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ENDDO ! K |
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DO K = Nz, 1, -1 |
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kM1 =max(1,k-1) ! Points to level above k (=k-1) |
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kUp =1+MOD(k+1,2) ! Cycles through 1,2 to point to layer above |
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kDown=1+MOD(k,2) ! Cycles through 2,1 to point to current layer |
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iMin = 1-OLx+2 |
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iMax = sNx+OLx-1 |
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jMin = 1-OLy+2 |
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jMax = sNy+OLy-1 |
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C-- Get temporary terms used by tendency routines |
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CALL CALC_COMMON_FACTORS ( |
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I bi,bj,iMin,iMax,jMin,jMax,k,kM1,kUp,kDown, |
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O xA,yA,uTrans,vTrans,wTrans,maskC,maskUp, |
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I myThid) |
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|
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C-- Calculate accelerations in the momentum equations |
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CALL CALC_MOM_RHS( |
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I bi,bj,iMin,iMax,jMin,jMax,k,kM1,kUp,kDown, |
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I xA,yA,uTrans,vTrans,wTrans,maskC, |
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I pH, |
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U aTerm,xTerm,cTerm,mTerm,pTerm, |
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U fZon, fMer, fVerU, fVerV, |
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I myThid) |
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|
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C-- Calculate active tracer tendencies |
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CALL CALC_GT( |
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I bi,bj,iMin,iMax,jMin,jMax, k,kM1,kUp,kDown, |
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I xA,yA,uTrans,vTrans,wTrans,maskUp, |
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U aTerm,xTerm,fZon,fMer,fVerT, |
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I myThid) |
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Cdbg CALL CALC_GS( |
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Cdbg I bi,bj,iMin,iMax,jMin,jMax, k,kM1,kUp,kDown, |
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Cdbg I xA,yA,uTrans,vTrans,wTrans,maskUp, |
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Cdbg U aTerm,xTerm,fZon,fMer,fVerS, |
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Cdbg I myThid) |
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|
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ENDDO ! 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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