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dgoldberg |
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C $Header: /u/gcmpack/MITgcm/pkg/streamice/streamice_forced_buttress.F,v 1.2 2014/06/04 12:56:40 dgoldberg Exp $ |
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C $Name: $ |
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#include "STREAMICE_OPTIONS.h" |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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CBOP |
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SUBROUTINE STREAMICE_FORCED_BUTTRESS( myThid ) |
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! O taudx, |
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! O taudy ) |
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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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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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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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#ifdef ALLOW_STREAMICE |
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#ifdef STREAMICE_STRESS_BOUNDARY_CONTROL |
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C LOCAL VARIABLES |
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INTEGER i, j, bi, bj, k, l |
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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 unconf_stress |
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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-OLy+1,sNx+OLy-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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if (streamice_hmask(i,j,bi,bj).eq.1.0) then |
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! baseline unconfined stress |
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IF (float_frac_streamice(i,j,bi,bj) .eq. 1.0) THEN |
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unconf_stress = gravity * |
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& (streamice_density * H_streamice(i,j,bi,bj)**2 - |
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#ifdef USE_ALT_RLOW |
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& streamice_density_ocean_avg * R_low_si(i,j,bi,bj)**2) |
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#else |
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& streamice_density_ocean_avg * R_low(i,j,bi,bj)**2) |
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#endif |
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ELSE |
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unconf_stress = streamice_density * gravity * |
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& (1-streamice_density/streamice_density_ocean_avg) * |
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& H_streamice(i,j,bi,bj)**2 |
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ENDIF |
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! right face |
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if (streamice_ufacemask(i+1,j,bi,bj).eq.2.0) then |
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do k=0,1 |
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if (streamice_umask(i+1,j+k,bi,bj).eq.1.0) then |
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taudx_SI(i+1,j+k,bi,bj) = taudx_SI(i+1,j+k,bi,bj) + |
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& (streamice_u_normal_pert(i+1,j,bi,bj) + |
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& streamice_u_normal_stress(i+1,j,bi,bj)) * |
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& .5 * unconf_stress * dyG(i+1,j,bi,bj) |
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taudy_SI(i+1,j+k,bi,bj) = taudy_SI(i+1,j+k,bi,bj) + |
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& (streamice_v_shear_pert(i+1,j,bi,bj) + |
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& streamice_v_shear_stress(i+1,j,bi,bj)) * |
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& .5 * unconf_stress * dyG(i+1,j,bi,bj) |
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endif |
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enddo |
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endif |
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! left face |
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if (streamice_ufacemask(i,j,bi,bj).eq.2.0) then |
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do k=0,1 |
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if (streamice_umask(i,j+k,bi,bj).eq.1.0) then |
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taudx_SI(i,j+k,bi,bj) = taudx_SI(i,j+k,bi,bj) - |
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& (streamice_u_normal_pert(i,j,bi,bj) + |
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& streamice_u_normal_stress(i,j,bi,bj)) * |
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& .5 * unconf_stress * dyG(i,j,bi,bj) |
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taudy_SI(i,j+k,bi,bj) = taudy_SI(i,j+k,bi,bj) - |
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& (streamice_v_shear_pert(i,j,bi,bj) + |
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& streamice_v_shear_stress(i,j,bi,bj)) * |
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& .5 * unconf_stress * dyG(i,j,bi,bj) |
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endif |
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enddo |
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endif |
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if (streamice_vfacemask(i,j+1,bi,bj).eq.2.0) then |
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do k=0,1 |
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if (streamice_umask(i+k,j+1,bi,bj).eq.1.0) then |
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taudy_SI(i+k,j+1,bi,bj) = taudy_SI(i+k,j+1,bi,bj) + |
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& (streamice_v_normal_pert(i,j+1,bi,bj) + |
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& streamice_v_normal_stress(i,j+1,bi,bj)) * |
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& .5 * dxG(i,j+1,bi,bj) * unconf_stress |
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taudx_SI(i+k,j+1,bi,bj) = taudx_SI(i+k,j+1,bi,bj) + |
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& (streamice_u_shear_pert(i,j+1,bi,bj) + |
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& streamice_u_shear_stress(i,j+1,bi,bj)) * |
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& .5 * unconf_stress * dxG(i,j+1,bi,bj) |
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endif |
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enddo |
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endif |
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if (streamice_vfacemask(i,j,bi,bj).eq.2.0) then |
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do k=0,1 |
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if (streamice_umask(i+k,j,bi,bj).eq.1.0) then |
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taudy_SI(i+k,j,bi,bj) = taudy_SI(i+k,j,bi,bj) - |
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& (streamice_v_normal_pert(i,j,bi,bj) + |
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& streamice_v_normal_stress(i,j,bi,bj)) * |
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& .5 * dxG(i,j,bi,bj) * unconf_stress |
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taudx_SI(i+k,j,bi,bj) = taudx_SI(i+k,j,bi,bj) - |
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& (streamice_u_shear_pert(i,j,bi,bj) + |
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& streamice_u_shear_stress(i,j,bi,bj)) * |
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& .5 * unconf_stress * dxG(i,j,bi,bj) |
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endif |
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enddo |
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endif |
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END IF |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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#endif |
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#endif |
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RETURN |
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END |
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