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C $Header: /u/gcmpack/models/MITgcmUV/model/src/calc_surf_dr.F,v 1.1 2001/08/27 18:50:10 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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SUBROUTINE CALC_SURF_DR(etaFld, |
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I myTime, myIter, myThid ) |
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C /==========================================================\ |
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C | SUBROUTINE CALC_SURF_DR | |
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C | o Calculate the new surface level thickness according to | |
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C | the surface r-position (Non-Linear Free-Surf) | |
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C | o take decision if grid box becomes too thin or too thick| |
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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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c #include "DYNVARS.h" |
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#include "GRID.h" |
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#include "SURFACE.h" |
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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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C etaFld - current eta field used to update the hFactor |
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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_RL etaFld(1-Olx:sNx+Olx,1-Oly:sNy+Oly,nSx,nSy) |
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|
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#ifdef NONLIN_FRSURF |
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|
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C Local variables in common block |
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C Rmin_surf : minimum r_value of the free surface position |
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C that satisfy the hFacInf criteria |
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COMMON /LOCAL_CALC_SURF_DR/ Rmin_surf |
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_RL Rmin_surf(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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|
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C Local variables |
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C i,j,k,bi,bj - loop counter |
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C rSurftmp : free surface r-position that is used to compute hFac_surf |
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C adjust_nb_pt : Nb of grid points where rSurf is adjusted (hFactInf) |
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C adjust_volum : adjustment effect on the volume (domain size) |
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|
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INTEGER i,j,k,bi,bj |
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INTEGER ks |
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_RL hFacInfMOM, Rmin_tmp, hFactmp, adjust_nb_pt, adjust_volum |
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_RL rSurftmp(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RS hhm, hhp |
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CHARACTER*(MAX_LEN_MBUF) suff |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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IF (myIter.EQ.nIter0) THEN |
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|
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hFacInfMOM = hFacInf |
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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-- Initialise arrays : |
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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hFac_surfC(i,j,bi,bj) = 0. |
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hFac_surfW(i,j,bi,bj) = 0. |
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hFac_surfS(i,j,bi,bj) = 0. |
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Rmin_surf(i,j,bi,bj) = Ro_surf(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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|
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C-- Compute the mimimum value of r_surf (used for computing hFac_surfC) |
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DO j=1,sNy |
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DO i=1,sNx |
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ks = ksurfC(i,j,bi,bj) |
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IF (ks.LE.Nr) THEN |
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Rmin_tmp = rF(ks+1) |
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IF ( ks.EQ.ksurfW(i,j,bi,bj)) |
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& Rmin_tmp = MAX(Rmin_tmp, R_low(i-1,j,bi,bj)) |
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IF ( ks.EQ.ksurfW(i+1,j,bi,bj)) |
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& Rmin_tmp = MAX(Rmin_tmp, R_low(i+1,j,bi,bj)) |
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IF ( ks.EQ.ksurfS(i,j,bi,bj)) |
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& Rmin_tmp = MAX(Rmin_tmp, R_low(i,j-1,bi,bj)) |
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IF ( ks.EQ.ksurfS(i,j+1,bi,bj)) |
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& Rmin_tmp = MAX(Rmin_tmp, R_low(i,j+1,bi,bj)) |
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|
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Rmin_surf(i,j,bi,bj) = |
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& MAX( MAX(rF(ks+1),R_low(i,j,bi,bj)) + hFacInf*drF(ks), |
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& Rmin_tmp + hFacInfMOM*drF(ks) |
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& ) |
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ENDIF |
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ENDDO |
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ENDDO |
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|
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C- end bi,bj loop. |
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ENDDO |
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ENDDO |
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|
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_EXCH_XY_R8( Rmin_surf, myThid ) |
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|
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C- end of initialization block |
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ENDIF |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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adjust_nb_pt = 0. |
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adjust_volum = 0. |
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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---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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C-- Compute the new fractional thickness of surface level (ksurfC): |
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|
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DO j=0,sNy+1 |
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DO i=0,sNx+1 |
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rSurftmp(i,j) = Ro_surf(i,j,bi,bj)+etaFld(i,j,bi,bj) |
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ks = ksurfC(i,j,bi,bj) |
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IF (ks.LE.Nr) THEN |
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IF (rSurftmp(i,j) .LT. Rmin_surf(i,j,bi,bj)) THEN |
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C-- Needs to do something : |
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hFactmp = ( rSurftmp(i,j)-MAX(rF(ks+1),R_low(i,j,bi,bj)) |
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& )*recip_drF(ks) |
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IF (hFactmp.LT.hFacInf) THEN |
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write(0,'(2A,6I4,I10)') 'WARNING: hFacC < hFacInf at:', |
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& ' i,j,k,bi,bj,Thid,Iter=',i,j,ks,bi,bj,myThid,myIter |
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ELSE |
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write(0,'(2A,6I4,I10)') 'WARNING: hFac < hFacInf near:', |
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& ' i,j,k,bi,bj,Thid,Iter=',i,j,ks,bi,bj,myThid,myIter |
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ENDIF |
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write(0,'(A,2F10.6,1PE14.6)') 'hFac_n-1,hFac_n,eta =', |
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& hfacC(i,j,ks,bi,bj), hFactmp, etaFld(i,j,bi,bj) |
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C-- Decide to STOP : |
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c write(0,'(2A)') 'STOP in CALC_SURF_DR :', |
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c & ' too SMALL hFac !' |
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c STOP 'ABNORMAL END: S/R CALC_SURF_DR' |
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C---------- |
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|
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C-- Continue with Rmin_surf: |
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IF ( i.GE.1.AND.i.LE.sNx .AND. |
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& j.GE.1.AND.j.LE.sNy ) THEN |
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adjust_nb_pt = adjust_nb_pt + 1. |
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adjust_volum = adjust_volum |
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& + rA(i,j,bi,bj)*(Rmin_surf(i,j,bi,bj)-rSurftmp(i,j)) |
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ENDIF |
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rSurftmp(i,j) = Rmin_surf(i,j,bi,bj) |
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C---------- |
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ENDIF |
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|
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C-- Set hFac_surfC : |
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hFac_surfC(i,j,bi,bj) = |
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& ( rSurftmp(i,j) - MAX(rF(ks+1), R_low(i,j,bi,bj)) |
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& )*recip_drF(ks)*maskC(i,j,ks,bi,bj) |
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|
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IF (hFac_surfC(i,j,bi,bj).GT.hFacSup) THEN |
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C-- Usefull warning when hFac becomes very large: |
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write(0,'(2A,6I4,I10)') 'WARNING: hFacC > hFacSup at:', |
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& ' i,j,k,bi,bj,Thid,Iter=',i,j,ks,bi,bj,myThid,myIter |
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write(0,'(A,2F10.6,1PE14.6)') 'hFac_n-1,hFac_n,eta =', |
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& hfacC(i,j,ks,bi,bj), hFac_surfC(i,j,bi,bj), |
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& etaFld(i,j,bi,bj) |
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C-- Decide to STOP : |
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c write(0,'(2A)') 'STOP in CALC_SURF_DR :', |
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c & ' too LARGE hFac !' |
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c STOP 'ABNORMAL END: S/R CALC_SURF_DR' |
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C---------- |
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ENDIF |
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ENDIF |
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|
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ENDDO |
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ENDDO |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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C-- Compute fractional thickness of surface level, for U & V point: |
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|
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DO j=1,sNy |
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DO i=1,sNx+1 |
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ks = ksurfW(i,j,bi,bj) |
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IF (ks.LE.Nr) THEN |
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hhm = rF(ks) |
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IF(ks.EQ.ksurfC(i-1,j,bi,bj)) hhm = rSurftmp(i-1,j) |
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hhp = rF(ks) |
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IF(ks.EQ.ksurfC(i,j,bi,bj)) hhp = rSurftmp(i,j) |
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hFac_surfW(i,j,bi,bj) = |
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& ( MIN(hhm,hhp) |
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& - MAX(rF(ks+1),R_low(i-1,j,bi,bj),R_low(i,j,bi,bj)) |
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& )*recip_drF(ks)*maskW(i,j,ks,bi,bj) |
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ENDIF |
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ENDDO |
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ENDDO |
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|
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DO j=1,sNy+1 |
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DO i=1,sNx |
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ks = ksurfS(i,j,bi,bj) |
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IF (ks.LE.Nr) THEN |
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hhm = rF(ks) |
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IF(ks.EQ.ksurfC(i,j-1,bi,bj)) hhm = rSurftmp(i,j-1) |
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hhp = rF(ks) |
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IF(ks.EQ.ksurfC(i,j,bi,bj)) hhp = rSurftmp(i,j) |
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hFac_surfS(i,j,bi,bj) = |
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& ( MIN(hhm,hhp) |
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& - MAX(rF(ks+1),R_low(i,j-1,bi,bj),R_low(i,j,bi,bj)) |
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& )*recip_drF(ks)*maskS(i,j,ks,bi,bj) |
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ENDIF |
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ENDDO |
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ENDDO |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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C- end bi,bj loop. |
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ENDDO |
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ENDDO |
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|
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C-- Global diagnostic : |
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_GLOBAL_SUM_R8( adjust_nb_pt , myThid ) |
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_GLOBAL_SUM_R8( adjust_volum , myThid ) |
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IF (adjust_nb_pt .GE.1.) THEN |
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_BEGIN_MASTER( myThid ) |
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write(*,'(2(A,I10),1PE16.8)') ' SURF_ADJUSTMENT: Iter=', |
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& myIter, ' Nb_pts,Vol=', nint(adjust_nb_pt), adjust_volum |
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_END_MASTER( ) |
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ENDIF |
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|
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_EXCH_XY_R4(hFac_surfC, myThid ) |
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CALL EXCH_UV_XY_RS(hFac_surfW,hFac_surfS,.FALSE.,myThid) |
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|
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C----- |
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C Note: testing ksurfW,S is equivalent to a full height mask |
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C ==> no need for applying the mask here. |
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C and with "partial thin wall" ==> mask could be applied in S/R UPDATE_SURF_DR |
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C----- |
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|
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WRITE(suff,'(I10.10)') myIter |
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c CALL WRITE_FLD_XY_RS('hFac_surfC.',suff,hFac_surfC, |
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c & myIter,myThid) |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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#endif /* NONLIN_FRSURF */ |
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|
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RETURN |
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END |
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