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C $Header: /u/gcmpack/MITgcm/pkg/streamice/streamice_driving_stress_fd.F,v 1.2 2016/10/24 14:14:19 dgoldberg Exp $ |
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C $Name: $ |
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|
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#include "STREAMICE_OPTIONS.h" |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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CBOP |
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SUBROUTINE STREAMICE_DRIVING_STRESS_FD( myThid ) |
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! O taudx, |
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! O taudy ) |
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|
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C /============================================================\ |
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C | SUBROUTINE | |
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C | o | |
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C |============================================================| |
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C | | |
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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 "GRID.h" |
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#include "STREAMICE.h" |
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#include "STREAMICE_CG.h" |
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|
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C !INPUT/OUTPUT ARGUMENTS |
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INTEGER myThid |
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! _RL taudx (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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! _RL taudx (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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|
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#ifdef ALLOW_STREAMICE |
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|
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|
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C LOCAL VARIABLES |
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INTEGER i, j, bi, bj, k, l, |
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& Gi, Gj |
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LOGICAL at_west_bdry, at_east_bdry, |
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& at_north_bdry, at_south_bdry |
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_RL dsdx |
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& (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL dsdy |
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& (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL face_factor, grd_below_sl, i_rhow |
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|
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|
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i_rhow = 1./streamice_density_ocean_avg |
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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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DO j=1-OLy+1,sNy+OLy-1 |
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DO i=1-OLx+1,sNx+OLx-1 |
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taudx_SI(i,j,bi,bj) = 0. _d 0 |
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taudy_SI(i,j,bi,bj) = 0. _d 0 |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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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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DO j=1,sNy |
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DO i=1,sNx |
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|
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IF (streamice_hmask(i,j,bi,bj) .eq. 1) THEN |
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|
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! ds/dx ------------------------------------------------ |
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|
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IF (streamice_hmask(i-1,j,bi,bj) .eq. 1) THEN |
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|
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dsdx(i,j,bi,bj) = recip_dxC(i,j,bi,bj) * |
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& (surf_el_streamice(i,j,bi,bj) - |
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& surf_el_streamice(i-1,j,bi,bj)) |
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|
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ELSEIF (streamice_hmask(i-1,j,bi,bj).eq.0.or. |
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& streamice_hmask(i-1,j,bi,bj).eq.2) THEN |
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|
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IF (streamice_hmask(i+1,j,bi,bj).eq.1) THEN |
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dsdx(i,j,bi,bj) = recip_dxC(i+1,j,bi,bj) * |
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& (surf_el_streamice(i+1,j,bi,bj) - |
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& surf_el_streamice(i,j,bi,bj)) |
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ELSE |
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dsdx(i,j,bi,bj) = 0.0 |
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ENDIF |
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|
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ELSE ! streamice_hmask(i-1,j,bi,bj).eq. -1 |
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dsdx(i,j,bi,bj) = 0.0 |
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ENDIF |
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|
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! ds/dy ------------------------------------------------ |
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|
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IF (streamice_hmask(i,j-1,bi,bj) .eq. 1) THEN |
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|
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dsdy(i,j,bi,bj) = recip_dyC(i,j,bi,bj) * |
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& (surf_el_streamice(i,j,bi,bj) - |
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& surf_el_streamice(i,j-1,bi,bj)) |
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|
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ELSEIF (streamice_hmask(i,j-1,bi,bj).eq.0.or. |
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& streamice_hmask(i,j-1,bi,bj).eq.2) THEN |
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|
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IF (streamice_hmask(i,j+1,bi,bj).eq.1) THEN |
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dsdy(i,j,bi,bj) = recip_dyC(i,j+1,bi,bj) * |
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& (surf_el_streamice(i,j+1,bi,bj) - |
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& surf_el_streamice(i,j,bi,bj)) |
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ELSE |
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dsdy(i,j,bi,bj) = 0.0 |
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ENDIF |
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|
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ELSE ! streamice_hmask(i-1,j,bi,bj).eq. -1 |
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dsdx(i,j,bi,bj) = 0.0 |
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ENDIF |
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|
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! end ------------------------------------------------ |
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|
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ELSEIF(streamice_hmask(i,j,bi,bj).eq.0.or. |
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& streamice_hmask(i,j,bi,bj).eq.2) THEN |
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|
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! ds/dx ------------------------------------------------ |
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|
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IF(streamice_hmask(i-1,j,bi,bj).eq.1.and. |
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& streamice_hmask(i-2,j,bi,bj).eq.1) THEN |
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|
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dsdx(i,j,bi,bj) = recip_dxC(i-1,j,bi,bj) * |
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& (surf_el_streamice(i-1,j,bi,bj) - |
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& surf_el_streamice(i-2,j,bi,bj)) |
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|
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ELSE |
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dsdx(i,j,bi,bj) = 0.0 |
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|
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ENDIF |
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|
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! ds/dy ------------------------------------------------ |
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|
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IF(streamice_hmask(i,j-1,bi,bj).eq.1.and. |
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& streamice_hmask(i,j-2,bi,bj).eq.1) THEN |
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|
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dsdy(i,j,bi,bj) = recip_dyC(i,j-1,bi,bj) * |
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& (surf_el_streamice(i,j-1,bi,bj) - |
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& surf_el_streamice(i,j-2,bi,bj)) |
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|
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ELSE |
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dsdy(i,j,bi,bj) = 0.0 |
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|
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ENDIF |
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|
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! end ------------------------------------------------ |
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|
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ENDIF |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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_EXCH_XY_RL(dsdy, mythid) |
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_EXCH_XY_RL(dsdx, mythid) |
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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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DO i=1,sNx |
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DO j=1,sNy |
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|
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! Gi = (myXGlobalLo-1)+(bi-1)*sNx+i |
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! Gj = (myYGlobalLo-1)+(bj-1)*sNy+j |
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|
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IF (streamice_hmask(i,j,bi,bj).eq.1.0) THEN |
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|
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IF (streamice_umask(i,j,bi,bj).eq.1.0) THEN |
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|
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taudx_si(i,j,bi,bj) = taudx_si(i,j,bi,bj) + |
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& gravity * streamice_density * |
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& H_streamice (i,j,bi,bj) * dsdx (i,j,bi,bj) * |
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& (0.5 * dyG(i,j,bi,bj) + 0.25 * dyF(i,j,bi,bj)) * |
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& 0.5 * dxG(i,j,bi,bj) |
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|
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taudx_si(i,j,bi,bj) = taudx_si(i,j,bi,bj) + |
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& gravity * streamice_density * |
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& H_streamice (i,j,bi,bj) * dsdx (i+1,j,bi,bj) * |
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& 0.25 * dyF(i,j,bi,bj) * |
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& 0.5 * dxG(i,j,bi,bj) |
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|
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ENDIF |
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|
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IF (streamice_umask(i+1,j,bi,bj).eq.1.0) THEN |
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|
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taudx_si(i+1,j,bi,bj) = taudx_si(i+1,j,bi,bj) + |
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& gravity * streamice_density * |
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& H_streamice (i,j,bi,bj) * dsdx (i+1,j,bi,bj) * |
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& (0.5 * dyG(i+1,j,bi,bj) + 0.25 * dyF(i,j,bi,bj)) * |
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& 0.5 * dxG(i,j,bi,bj) |
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|
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taudx_si(i+1,j,bi,bj) = taudx_si(i+1,j,bi,bj) + |
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& gravity * streamice_density * |
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& H_streamice (i,j,bi,bj) * dsdx (i,j,bi,bj) * |
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& 0.25 * dyF(i,j,bi,bj) * |
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& 0.5 * dxG(i,j,bi,bj) |
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|
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ENDIF |
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|
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IF (streamice_umask(i,j+1,bi,bj).eq.1.0) THEN |
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|
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taudx_si(i,j+1,bi,bj) = taudx_si(i,j+1,bi,bj) + |
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& gravity * streamice_density * |
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& H_streamice (i,j,bi,bj) * dsdx (i,j,bi,bj) * |
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& (0.5 * dyG(i,j,bi,bj) + 0.25 * dyF(i,j,bi,bj)) * |
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& 0.5 * dxG(i,j+1,bi,bj) |
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|
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taudx_si(i,j+1,bi,bj) = taudx_si(i,j+1,bi,bj) + |
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& gravity * streamice_density * |
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& H_streamice (i,j,bi,bj) * dsdx (i+1,j,bi,bj) * |
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& 0.25 * dyF(i,j,bi,bj) * |
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& 0.5 * dxG(i,j+1,bi,bj) |
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|
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ENDIF |
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|
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IF (streamice_umask(i+1,j+1,bi,bj).eq.1.0) THEN |
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|
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taudx_si(i+1,j+1,bi,bj) = taudx_si(i+1,j+1,bi,bj) + |
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& gravity * streamice_density * |
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& H_streamice (i,j,bi,bj) * dsdx (i+1,j,bi,bj) * |
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& (0.5 * dyG(i+1,j,bi,bj) + 0.25 * dyF(i,j,bi,bj)) * |
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& 0.5 * dxG(i,j+1,bi,bj) |
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|
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taudx_si(i+1,j+1,bi,bj) = taudx_si(i+1,j+1,bi,bj) + |
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& gravity * streamice_density * |
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& H_streamice (i,j,bi,bj) * dsdx (i,j,bi,bj) * |
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& 0.25 * dyF(i,j,bi,bj) * |
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& 0.5 * dxG(i,j+1,bi,bj) |
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|
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ENDIF |
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|
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#ifdef USE_ALT_RLOW |
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IF (R_low_si(i,j,bi,bj) .lt. 0. _d 0) then |
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#else |
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IF (R_low(i,j,bi,bj) .lt. 0. _d 0) then |
| 238 |
#endif |
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grd_below_sl = 1. _d 0 |
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else |
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grd_below_sl = 0. _d 0 |
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endif |
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|
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|
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! check face to right |
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IF (streamice_hmask(i+1,j,bi,bj).eq.0.or. |
| 247 |
& streamice_hmask(i+1,j,bi,bj).eq.2.or. |
| 248 |
& streamice_ufacemask(i+1,j,bi,bj).eq.2) THEN |
| 249 |
|
| 250 |
IF (float_frac_streamice(i,j,bi,bj) .eq. 1.0) THEN |
| 251 |
|
| 252 |
face_factor = |
| 253 |
& 0.25 * dyG(i+1,j,bi,bj) * |
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& gravity * |
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& streamice_density * H_streamice(i,j,bi,bj)**2- |
| 256 |
#ifdef USE_ALT_RLOW |
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& streamice_density_ocean_avg * grd_below_sl * |
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& R_low_si(i,j,bi,bj)**2 |
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#else |
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& streamice_density_ocean_avg * grd_below_sl * |
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& R_low(i,j,bi,bj)**2 |
| 262 |
#endif |
| 263 |
|
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ELSE |
| 265 |
|
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face_factor = |
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& 0.25 * dyG(i+1,j,bi,bj) * |
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& streamice_density * gravity * |
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& (1-streamice_density*i_rhow) * |
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& H_streamice(i,j,bi,bj)**2 |
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|
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ENDIF |
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|
| 274 |
taudx_si(i+1,j,bi,bj) = taudx_si(i+1,j,bi,bj) |
| 275 |
& - face_factor |
| 276 |
|
| 277 |
taudx_si(i+1,j+1,bi,bj) = taudx_si(i+1,j+1,bi,bj) |
| 278 |
& - face_factor |
| 279 |
|
| 280 |
ENDIF |
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|
| 282 |
! check face to left |
| 283 |
IF (streamice_hmask(i-1,j,bi,bj).eq.0.or. |
| 284 |
& streamice_hmask(i-1,j,bi,bj).eq.2.or. |
| 285 |
& streamice_ufacemask(i,j,bi,bj).eq.2) THEN |
| 286 |
|
| 287 |
IF (float_frac_streamice(i,j,bi,bj) .eq. 1.0) THEN |
| 288 |
|
| 289 |
face_factor = |
| 290 |
& 0.25 * dyG(i,j,bi,bj) * |
| 291 |
& gravity * |
| 292 |
& streamice_density * H_streamice(i,j,bi,bj)**2- |
| 293 |
#ifdef USE_ALT_RLOW |
| 294 |
& streamice_density_ocean_avg * grd_below_sl * |
| 295 |
& R_low_si(i,j,bi,bj)**2 |
| 296 |
#else |
| 297 |
& streamice_density_ocean_avg * grd_below_sl * |
| 298 |
& R_low(i,j,bi,bj)**2 |
| 299 |
#endif |
| 300 |
|
| 301 |
ELSE |
| 302 |
|
| 303 |
face_factor = |
| 304 |
& 0.25 * dyG(i,j,bi,bj) * |
| 305 |
& streamice_density * gravity * |
| 306 |
& (1-streamice_density*i_rhow) * |
| 307 |
& H_streamice(i,j,bi,bj)**2 |
| 308 |
|
| 309 |
ENDIF |
| 310 |
|
| 311 |
taudx_si(i,j,bi,bj) = taudx_si(i,j,bi,bj) |
| 312 |
& + face_factor |
| 313 |
|
| 314 |
taudx_si(i,j+1,bi,bj) = taudx_si(i,j+1,bi,bj) |
| 315 |
& + face_factor |
| 316 |
|
| 317 |
ENDIF |
| 318 |
|
| 319 |
! Y FORCES |
| 320 |
|
| 321 |
IF (streamice_vmask(i,j,bi,bj).eq.1.0) THEN |
| 322 |
|
| 323 |
taudy_si(i,j,bi,bj) = taudy_si(i,j,bi,bj) + |
| 324 |
& gravity * streamice_density * |
| 325 |
& H_streamice (i,j,bi,bj) * dsdy (i,j,bi,bj) * |
| 326 |
& (0.5 * dxG(i,j,bi,bj) + 0.25 * dxF(i,j,bi,bj)) * |
| 327 |
& 0.5 * dyG(i,j,bi,bj) |
| 328 |
|
| 329 |
taudy_si(i,j,bi,bj) = taudy_si(i,j,bi,bj) + |
| 330 |
& gravity * streamice_density * |
| 331 |
& H_streamice (i,j,bi,bj) * dsdy (i,j+1,bi,bj) * |
| 332 |
& 0.25 * dxF(i,j,bi,bj) * |
| 333 |
& 0.5 * dyG(i,j,bi,bj) |
| 334 |
|
| 335 |
ENDIF |
| 336 |
|
| 337 |
IF (streamice_vmask(i,j+1,bi,bj).eq.1.0) THEN |
| 338 |
|
| 339 |
taudy_si(i,j+1,bi,bj) = taudy_si(i,j+1,bi,bj) + |
| 340 |
& gravity * streamice_density * |
| 341 |
& H_streamice (i,j,bi,bj) * dsdy (i,j+1,bi,bj) * |
| 342 |
& (0.5 * dxG(i,j+1,bi,bj) + 0.25 * dxF(i,j,bi,bj)) * |
| 343 |
& 0.5 * dyG(i,j,bi,bj) |
| 344 |
|
| 345 |
taudy_si(i,j+1,bi,bj) = taudy_si(i,j+1,bi,bj) + |
| 346 |
& gravity * streamice_density * |
| 347 |
& H_streamice (i,j,bi,bj) * dsdy (i,j,bi,bj) * |
| 348 |
& 0.25 * dxF(i,j,bi,bj) * |
| 349 |
& 0.5 * dyG(i,j,bi,bj) |
| 350 |
|
| 351 |
ENDIF |
| 352 |
|
| 353 |
IF (streamice_vmask(i+1,j,bi,bj).eq.1.0) THEN |
| 354 |
|
| 355 |
taudy_si(i+1,j,bi,bj) = taudy_si(i+1,j,bi,bj) + |
| 356 |
& gravity * streamice_density * |
| 357 |
& H_streamice (i,j,bi,bj) * dsdy (i,j,bi,bj) * |
| 358 |
& (0.5 * dxG(i,j,bi,bj) + 0.25 * dxF(i,j,bi,bj)) * |
| 359 |
& 0.5 * dyG(i+1,j,bi,bj) |
| 360 |
|
| 361 |
taudy_si(i+1,j,bi,bj) = taudy_si(i+1,j,bi,bj) + |
| 362 |
& gravity * streamice_density * |
| 363 |
& H_streamice (i,j,bi,bj) * dsdy (i,j+1,bi,bj) * |
| 364 |
& 0.25 * dxF(i,j,bi,bj) * |
| 365 |
& 0.5 * dyG(i+1,j,bi,bj) |
| 366 |
|
| 367 |
ENDIF |
| 368 |
|
| 369 |
IF (streamice_umask(i+1,j+1,bi,bj).eq.1.0) THEN |
| 370 |
|
| 371 |
taudy_si(i+1,j+1,bi,bj) = taudy_si(i+1,j+1,bi,bj) + |
| 372 |
& gravity * streamice_density * |
| 373 |
& H_streamice (i,j,bi,bj) * dsdy (i,j+1,bi,bj) * |
| 374 |
& (0.5 * dxG(i,j+1,bi,bj) + 0.25 * dxF(i,j,bi,bj)) * |
| 375 |
& 0.5 * dyG(i,j+1,bi,bj) |
| 376 |
|
| 377 |
taudy_si(i+1,j+1,bi,bj) = taudy_si(i+1,j+1,bi,bj) + |
| 378 |
& gravity * streamice_density * |
| 379 |
& H_streamice (i,j,bi,bj) * dsdy (i,j,bi,bj) * |
| 380 |
& 0.25 * dxF(i,j,bi,bj) * |
| 381 |
& 0.5 * dyG(i,j+1,bi,bj) |
| 382 |
|
| 383 |
ENDIF |
| 384 |
|
| 385 |
#ifdef USE_ALT_RLOW |
| 386 |
IF (R_low_si(i,j,bi,bj) .lt. 0. _d 0) then |
| 387 |
#else |
| 388 |
IF (R_low(i,j,bi,bj) .lt. 0. _d 0) then |
| 389 |
#endif |
| 390 |
grd_below_sl = 1. _d 0 |
| 391 |
else |
| 392 |
grd_below_sl = 0. _d 0 |
| 393 |
endif |
| 394 |
|
| 395 |
|
| 396 |
! check face to right |
| 397 |
IF (streamice_hmask(i,j+1,bi,bj).eq.0.or. |
| 398 |
& streamice_hmask(i,j+1,bi,bj).eq.2.or. |
| 399 |
& streamice_vfacemask(i,j+1,bi,bj).eq.2) THEN |
| 400 |
|
| 401 |
IF (float_frac_streamice(i,j,bi,bj) .eq. 1.0) THEN |
| 402 |
|
| 403 |
face_factor = |
| 404 |
& 0.25 * dxG(i,j+1,bi,bj) * |
| 405 |
& gravity * |
| 406 |
& streamice_density * H_streamice(i,j,bi,bj)**2- |
| 407 |
#ifdef USE_ALT_RLOW |
| 408 |
& streamice_density_ocean_avg * grd_below_sl * |
| 409 |
& R_low_si(i,j,bi,bj)**2 |
| 410 |
#else |
| 411 |
& streamice_density_ocean_avg * grd_below_sl * |
| 412 |
& R_low(i,j,bi,bj)**2 |
| 413 |
#endif |
| 414 |
|
| 415 |
ELSE |
| 416 |
|
| 417 |
face_factor = |
| 418 |
& 0.25 * dxG(i,j+1,bi,bj) * |
| 419 |
& streamice_density * gravity * |
| 420 |
& (1-streamice_density*i_rhow) * |
| 421 |
& H_streamice(i,j,bi,bj)**2 |
| 422 |
|
| 423 |
ENDIF |
| 424 |
|
| 425 |
taudy_si(i,j+1,bi,bj) = taudy_si(i,j+1,bi,bj) |
| 426 |
& - face_factor |
| 427 |
|
| 428 |
taudy_si(i+1,j+1,bi,bj) = taudy_si(i+1,j+1,bi,bj) |
| 429 |
& - face_factor |
| 430 |
|
| 431 |
ENDIF |
| 432 |
|
| 433 |
! check face to left |
| 434 |
IF (streamice_hmask(i,j-1,bi,bj).eq.0.or. |
| 435 |
& streamice_hmask(i,j-1,bi,bj).eq.2.or. |
| 436 |
& streamice_vfacemask(i,j,bi,bj).eq.2) THEN |
| 437 |
|
| 438 |
IF (float_frac_streamice(i,j,bi,bj) .eq. 1.0) THEN |
| 439 |
|
| 440 |
face_factor = |
| 441 |
& 0.25 * dxG(i,j,bi,bj) * |
| 442 |
& gravity * |
| 443 |
& streamice_density * H_streamice(i,j,bi,bj)**2- |
| 444 |
#ifdef USE_ALT_RLOW |
| 445 |
& streamice_density_ocean_avg * grd_below_sl * |
| 446 |
& R_low_si(i,j,bi,bj)**2 |
| 447 |
#else |
| 448 |
& streamice_density_ocean_avg * grd_below_sl * |
| 449 |
& R_low(i,j,bi,bj)**2 |
| 450 |
#endif |
| 451 |
|
| 452 |
ELSE |
| 453 |
|
| 454 |
face_factor = |
| 455 |
& 0.25 * dxG(i,j,bi,bj) * |
| 456 |
& streamice_density * gravity * |
| 457 |
& (1-streamice_density*i_rhow) * |
| 458 |
& H_streamice(i,j,bi,bj)**2 |
| 459 |
|
| 460 |
ENDIF |
| 461 |
|
| 462 |
taudy_si(i,j,bi,bj) = taudy_SI(i,j,bi,bj) |
| 463 |
& + face_factor |
| 464 |
|
| 465 |
taudy_si(i+1,j,bi,bj) = taudy_si(i+1,j,bi,bj) |
| 466 |
& + face_factor |
| 467 |
|
| 468 |
ENDIF |
| 469 |
|
| 470 |
|
| 471 |
ENDIF |
| 472 |
|
| 473 |
ENDDO |
| 474 |
ENDDO |
| 475 |
ENDDO |
| 476 |
ENDDO |
| 477 |
|
| 478 |
DO bj = myByLo(myThid), myByHi(myThid) |
| 479 |
DO bi = myBxLo(myThid), myBxHi(myThid) |
| 480 |
DO j=1-OLy+1,sNy+OLy-1 |
| 481 |
DO i=1-OLx+1,sNx+OLx-1 |
| 482 |
taudx_SI(i,j,bi,bj) = -1.*taudx_SI(i,j,bi,bj) |
| 483 |
taudy_SI(i,j,bi,bj) = -1.*taudy_SI(i,j,bi,bj) |
| 484 |
ENDDO |
| 485 |
ENDDO |
| 486 |
ENDDO |
| 487 |
ENDDO |
| 488 |
! call write_fld_xy_rl ('driving_taux','',taudx_si,0,mythid) |
| 489 |
|
| 490 |
#endif |
| 491 |
RETURN |
| 492 |
END |
| 493 |
|
| 494 |
|
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