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C $Header: /u/gcmpack/MITgcm/pkg/seaice/seaice_ocean_stress.F,v 1.3 2006/03/06 20:53:25 mlosch Exp $ |
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C $Name: $ |
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|
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#include "SEAICE_OPTIONS.h" |
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|
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CStartOfInterface |
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SUBROUTINE SEAICE_OCEAN_STRESS( |
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I myTime, myIter, myThid ) |
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C /==========================================================\ |
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C | SUBROUTINE SEAICE_OCEAN_STRESS | |
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C | o Calculate ocean surface stresses | |
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C | - C-grid version | |
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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 "FFIELDS.h" |
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#include "SEAICE.h" |
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#include "SEAICE_PARAMS.h" |
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|
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C === Routine arguments === |
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C myTime - Simulation time |
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C myIter - Simulation timestep number |
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C myThid - Thread no. that called this routine. |
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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CML _RL COR_ICE (1-OLx:sNx+OLx,1-OLy:sNy+OLy, nSx,nSy) |
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CEndOfInterface |
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|
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#ifdef SEAICE_CGRID |
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C === Local variables === |
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C i,j,bi,bj - Loop counters |
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|
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INTEGER i, j, bi, bj |
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_RL SINWAT, COSWAT |
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_RL fuIce, fvIce |
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_RL areaW, areaS |
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|
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c introduce turning angle (default is zero) |
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SINWAT=SIN(SEAICE_waterTurnAngle*deg2rad) |
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COSWAT=COS(SEAICE_waterTurnAngle*deg2rad) |
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|
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C-- Update overlap regions |
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CALL EXCH_UV_XY_RL(WINDX, WINDY, .TRUE., myThid) |
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|
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#ifndef SEAICE_EXTERNAL_FLUXES |
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C-- Interpolate wind stress (N/m^2) from C-points of C-grid |
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C to U and V points of C-grid for forcing the ocean model. |
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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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fu(I,J,bi,bj)=0.5*(WINDX(I,J,bi,bj) + WINDX(I-1,J,bi,bj)) |
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fv(I,J,bi,bj)=0.5*(WINDY(I,J,bi,bj) + WINDY(I,J-1,bi,bj)) |
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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 /* ifndef SEAICE_EXTERNAL_FLUXES */ |
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|
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C-- Compute ice-affected wind stress (interpolate to U/V-points) |
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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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fuIce=HALF*( DWATN(I,J,bi,bj)+DWATN(I,J+1,bi,bj) )*( |
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& COSWAT * |
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& ( UICE(I,J,1,bi,bj)-GWATX(I,J,bi,bj) ) |
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& - SINWAT* 0.5 _d 0 * ( |
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& 0.5 _d 0*(vIce(I ,J ,1,bi,bj)-GWATY(I ,J ,bi,bj) |
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& +vIce(I-1,J ,1,bi,bj)-GWATY(I-1,J ,bi,bj)) |
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& +0.5 _d 0*(vIce(I ,J+1,1,bi,bj)-GWATY(I ,J+1,bi,bj) |
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& +vIce(I-1,J+1,1,bi,bj)-GWATY(I-1,J+1,bi,bj)) ) |
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& ) |
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fvIce=HALF*( DWATN(I,J,bi,bj)+DWATN(I+1,J,bi,bj) )*( |
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& SINWAT * |
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& ( UICE(I,J,1,bi,bj)-GWATX(I,J,bi,bj) ) |
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& + COSWAT * 0.5 _d 0 * ( |
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& 0.5 _d 0*(uIce(I ,J ,1,bi,bj)-GWATX(I ,J ,bi,bj) |
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& +uIce(I+1,J ,1,bi,bj)-GWATX(I+1,J ,bi,bj)) |
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& +0.5 _d 0*(uIce(I ,J-1,1,bi,bj)-GWATX(I ,J-1,bi,bj) |
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& +uIce(I+1,J-1,1,bi,bj)-GWATX(I+1,J-1,bi,bj)) ) |
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& ) |
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areaW = 0.5 _d 0 * (AREA(I,J,1,bi,bj) + AREA(I-1,J,1,bi,bj)) |
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areaS = 0.5 _d 0 * (AREA(I,J,1,bi,bj) + AREA(I,J-1,1,bi,bj)) |
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fu(I,J,bi,bj)=(ONE-areaW)*fu(I,J,bi,bj)+areaW*fuIce |
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fv(I,J,bi,bj)=(ONE-areaS)*fv(I,J,bi,bj)+areaS*fvIce |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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CALL EXCH_UV_XY_RS(fu, fv, .TRUE., myThid) |
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|
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#endif /* not SEAICE_CGRID */ |
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|
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RETURN |
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END |
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