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ksnow |
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C $Header: /u/gcmpack/MITgcm/model/src/calc_surf_dr.F,v 1.20 2014/07/24 15:41:57 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_SURF_DR |
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C !INTERFACE: |
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SUBROUTINE CALC_SURF_DR( etaFld, |
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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_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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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 "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "GRID.h" |
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#include "SURFACE.h" |
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#include "SHELFICE.h" |
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C !INPUT/OUTPUT PARAMETERS: |
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C == Routine arguments == |
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C etaFld :: current eta field used to update the hFactor |
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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 etaFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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#ifdef NONLIN_FRSURF |
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C !LOCAL VARIABLES: |
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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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C numbWrite :: count the Number of warning written on STD-ERR file |
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C numbWrMax :: maximum Number of warning written on STD-ERR file |
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INTEGER i,j,bi,bj |
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INTEGER ks, numbWrite, numbWrMax |
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_RL 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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c CHARACTER*(MAX_LEN_MBUF) suff |
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CEOP |
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DATA numbWrite / 0 / |
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numbWrMax = Nx*Ny |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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adjust_nb_pt = 0. |
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adjust_volum = 0. |
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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-- before updating hFac_surfC/S/W save current fields |
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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_surfNm1C(i,j,bi,bj) = hFac_surfC(i,j,bi,bj) |
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hFac_surfNm1S(i,j,bi,bj) = hFac_surfS(i,j,bi,bj) |
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hFac_surfNm1W(i,j,bi,bj) = hFac_surfW(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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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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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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IF (numbWrite.LE.numbWrMax) THEN |
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numbWrite = numbWrite + 1 |
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hFactmp = h0FacC(i,j,ks,bi,bj) |
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& + ( rSurftmp(i,j) - Ro_surf(i,j,bi,bj) )*recip_drF(ks) |
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IF (hFactmp.LT.hFacInf) THEN |
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WRITE(errorMessageUnit,'(2A,6I4,I10)') |
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& '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(errorMessageUnit,'(2A,6I4,I10)') |
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& '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(errorMessageUnit,'(A,2F10.6,1PE14.6)') |
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& '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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ENDIF |
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C-- Decide to STOP : |
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c WRITE(errorMessageUnit,'(A)') |
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c & 'STOP in CALC_SURF_DR : too SMALL hFac !' |
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c STOP 'ABNORMAL END: S/R CALC_SURF_DR' |
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C-- Or 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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C-- Set hFac_surfC : |
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hFac_surfC(i,j,bi,bj) = h0FacC(i,j,ks,bi,bj) |
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& + ( rSurftmp(i,j) - Ro_surf(i,j,bi,bj) |
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& )*recip_drF(ks)*maskC(i,j,ks,bi,bj) |
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C-- Usefull warning when hFac becomes very large: |
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IF ( numbWrite.LE.numbWrMax .AND. |
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& hFac_surfC(i,j,bi,bj).GT.hFacSup ) THEN |
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numbWrite = numbWrite + 1 |
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WRITE(errorMessageUnit,'(2A,6I4,I10)') |
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& '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(errorMessageUnit,'(A,2F10.6,1PE14.6)') |
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& 'hFac_n-1,hFac_n,eta =', hfacC(i,j,ks,bi,bj), |
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& hFac_surfC(i,j,bi,bj), etaFld(i,j,bi,bj) |
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ENDIF |
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C---------- |
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ENDIF |
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ENDDO |
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ENDDO |
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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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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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C- allows hFacW to be larger than surrounding hFacC=1 @ edge of a step with |
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C different kSurfC on either side (topo in p-coords, ice-shelf in z-coords) |
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hhm = rSurftmp(i-1,j) |
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hhp = rSurftmp(i,j) |
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C- make sure hFacW is not larger than the 2 surrounding hFacC |
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c hhm = rF(ks) |
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c IF(ks.EQ.kSurfC(i-1,j,bi,bj)) hhm = rSurftmp(i-1,j) |
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c hhp = rF(ks) |
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c IF(ks.EQ.kSurfC(i,j,bi,bj)) hhp = rSurftmp(i,j) |
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hFac_surfW(i,j,bi,bj) = h0FacW(i,j,ks,bi,bj) |
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& + ( MIN(hhm,hhp) |
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& - MIN( Ro_surf(i-1,j,bi,bj), Ro_surf(i,j,bi,bj) ) |
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& )*recip_drF(ks)*maskW(i,j,ks,bi,bj) |
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hFac_surfW(i,j,bi,bj) = max(hFac_surfW(i,j,bi,bj),0.0) |
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ENDIF |
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ENDDO |
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ENDDO |
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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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C- allows hFacS to be larger than surrounding hFacC=1 @ edge of a step with |
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C different kSurfC on either side (topo in p-coords, ice-shelf in z-coords) |
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hhm = rSurftmp(i,j-1) |
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hhp = rSurftmp(i,j) |
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C- make sure hFacS is not larger than the 2 surrounding hFacC |
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c hhm = rF(ks) |
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c IF(ks.EQ.kSurfC(i,j-1,bi,bj)) hhm = rSurftmp(i,j-1) |
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c hhp = rF(ks) |
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c IF(ks.EQ.kSurfC(i,j,bi,bj)) hhp = rSurftmp(i,j) |
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hFac_surfS(i,j,bi,bj) = h0FacS(i,j,ks,bi,bj) |
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& + ( MIN(hhm,hhp) |
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& - MIN( Ro_surf(i,j-1,bi,bj), Ro_surf(i,j,bi,bj) ) |
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& )*recip_drF(ks)*maskS(i,j,ks,bi,bj) |
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hFac_surfS(i,j,bi,bj) = max(hFac_surfS(i,j,bi,bj),0.0) |
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ENDIF |
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ENDDO |
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ENDDO |
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#ifdef ALLOW_OBCS |
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C-- Apply OBC to hFac_surfW,S before the EXCH calls |
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IF ( useOBCS ) THEN |
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CALL OBCS_APPLY_SURF_DR( |
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I bi, bj, etaFld, |
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U hFac_surfC, hFac_surfW, hFac_surfS, |
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I myTime, myIter, myThid ) |
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ENDIF |
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#endif /* ALLOW_OBCS */ |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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C- end bi,bj loop. |
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ENDDO |
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ENDDO |
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C-- Global diagnostic : |
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_GLOBAL_SUM_RL( adjust_nb_pt , myThid ) |
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IF ( adjust_nb_pt.GE.1. ) THEN |
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_GLOBAL_SUM_RL( adjust_volum , myThid ) |
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_BEGIN_MASTER( myThid ) |
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WRITE(standardMessageUnit,'(2(A,I10),1PE16.8)') |
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& ' SURF_ADJUSTMENT: Iter=', myIter, |
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& ' Nb_pts,Vol=', nint(adjust_nb_pt), adjust_volum |
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_END_MASTER( myThid ) |
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ENDIF |
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_EXCH_XY_RS(hFac_surfC, myThid ) |
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CALL EXCH_UV_XY_RS(hFac_surfW,hFac_surfS,.FALSE.,myThid) |
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! CALL EXCH_UV_XYZ_RS(maskW,maskS,.FALSE.,myThid) |
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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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c IF ( myIter.GE.0 ) THEN |
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c 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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c ENDIF |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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#endif /* NONLIN_FRSURF */ |
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RETURN |
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END |
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