--- MITgcm/pkg/seaice/seaice_calc_strainrates.F 2009/03/18 10:26:49 1.10 +++ MITgcm/pkg/seaice/seaice_calc_strainrates.F 2013/02/28 17:25:41 1.20 @@ -1,19 +1,31 @@ -C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/pkg/seaice/seaice_calc_strainrates.F,v 1.10 2009/03/18 10:26:49 mlosch Exp $ +C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/pkg/seaice/seaice_calc_strainrates.F,v 1.20 2013/02/28 17:25:41 mlosch Exp $ C $Name: $ #include "SEAICE_OPTIONS.h" +#ifdef ALLOW_OBCS +# include "OBCS_OPTIONS.h" +#else +# define OBCS_UVICE_OLD +#endif -CStartOfInterface +CBOP +C !ROUTINE: SEAICE_CALC_STRAINRATES +C !INTERFACE: SUBROUTINE SEAICE_CALC_STRAINRATES( I uFld, vFld, - O e11, e22, e12, - I kSize, iStep, myTime, myIter, myThid ) -C /==========================================================\ -C | SUBROUTINE SEAICE_CALC_STRAINRATES | -C | o compute strain rates from ice velocities | -C |==========================================================| -C | written by Martin Losch, Apr 2007 | -C \==========================================================/ + O e11Loc, e22Loc, e12Loc, + I iStep, myTime, myIter, myThid ) + +C !DESCRIPTION: \bv +C *==========================================================* +C | SUBROUTINE SEAICE_CALC_STRAINRATES +C | o compute strain rates from ice velocities +C *==========================================================* +C | written by Martin Losch, Apr 2007 +C *==========================================================* +C \ev + +C !USES: IMPLICIT NONE C === Global variables === @@ -21,100 +33,148 @@ #include "EEPARAMS.h" #include "PARAMS.h" #include "GRID.h" +#include "SEAICE_SIZE.h" #include "SEAICE_PARAMS.h" +#include "SEAICE.h" #ifdef ALLOW_AUTODIFF_TAMC # include "tamc.h" #endif +C !INPUT/OUTPUT PARAMETERS: C === Routine arguments === +C uFld :: ice velocity, u-component +C vFld :: ice velocity, v-component +C e11Loc :: strain rate tensor, component 1,1 +C e22Loc :: strain rate tensor, component 2,2 +C e12Loc :: strain rate tensor, component 1,2 C iStep :: Sub-time-step number C myTime :: Simulation time C myIter :: Simulation timestep number C myThid :: My Thread Id. number -C kSize :: length of 3rd dimension of velocity variables + _RL uFld (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) + _RL vFld (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) + _RL e11Loc (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) + _RL e22Loc (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) + _RL e12Loc (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) INTEGER iStep _RL myTime INTEGER myIter INTEGER myThid - INTEGER kSize -C ice velocities - _RL uFld(1-Olx:sNx+Olx,1-Oly:sNy+Oly,kSize,nSx,nSy) - _RL vFld(1-Olx:sNx+Olx,1-Oly:sNy+Oly,kSize,nSx,nSy) -C strain rate tensor - _RL e11 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) - _RL e22 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) - _RL e12 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) -CEndOfInterface +CEOP #ifdef SEAICE_CGRID #ifdef SEAICE_ALLOW_DYNAMICS +C !LOCAL VARIABLES: C === Local variables === -C i,j,bi,bj - Loop counters +C i,j,bi,bj :: Loop counters INTEGER i, j, bi, bj -C hFacU, hFacV - determine the no-slip boundary condition +C hFacU, hFacV :: determine the no-slip boundary condition INTEGER k - _RS hFacU, hFacV + _RS hFacU, hFacV, noSlipFac +C auxillary variables that help writing code that +C vectorizes even after TAFization + _RL dudx (1-OLx:sNx+OLx,1-OLy:sNy+OLy) + _RL dvdy (1-OLx:sNx+OLx,1-OLy:sNy+OLy) + _RL dudy (1-OLx:sNx+OLx,1-OLy:sNy+OLy) + _RL dvdx (1-OLx:sNx+OLx,1-OLy:sNy+OLy) + _RL uave (1-OLx:sNx+OLx,1-OLy:sNy+OLy) + _RL vave (1-OLx:sNx+OLx,1-OLy:sNy+OLy) k = 1 + noSlipFac = 0. _d 0 + IF ( SEAICE_no_slip ) noSlipFac = 1. _d 0 +C in order repoduce results before fixing a bug in r1.20 comment out +C the following line +CML IF ( SEAICE_no_slip ) noSlipFac = 2. _d 0 C DO bj=myByLo(myThid),myByHi(myThid) DO bi=myBxLo(myThid),myBxHi(myThid) - DO j=1-Oly,sNy+Oly-1 - DO i=1-Olx,sNx+Olx-1 -C evaluate strain rates - e11(I,J,bi,bj) = _recip_dxF(I,J,bi,bj) * - & (uFld(I+1,J,1,bi,bj)-uFld(I,J,1,bi,bj)) - & -HALF* - & (vFld(I,J,1,bi,bj)+vFld(I,J+1,1,bi,bj)) - & * _tanPhiAtU(I,J,bi,bj)*recip_rSphere - e22(I,J,bi,bj) = _recip_dyF(I,J,bi,bj) * - & (vFld(I,J+1,1,bi,bj)-vFld(I,J,1,bi,bj)) -C one metric term is missing - ENDDO - ENDDO - DO j=1-Oly+1,sNy+Oly - DO i=1-Olx+1,sNx+Olx - e12(I,J,bi,bj) = HALF*( - & (uFld(I ,J ,1,bi,bj) * _dxC(I ,J ,bi,bj) - & -uFld(I ,J-1,1,bi,bj) * _dxC(I ,J-1,bi,bj) - & +vFld(I ,J ,1,bi,bj) * _dyC(I ,J ,bi,bj) - & -vFld(I-1,J ,1,bi,bj) * _dyC(I-1,J ,bi,bj)) - & * recip_rAz(I,J,bi,bj) - & + - & 0.25 _d 0 * (uFld(I,J,1,bi,bj)+uFld(I ,J-1,1,bi,bj)) - & * ( _tanPhiAtU(I,J,bi,bj) + _tanPhiAtU(I,J-1,bi,bj) ) - & *recip_rSphere +C abbreviations on C-points, need to do them in separate loops +C for vectorization + DO j=1-OLy,sNy+OLy-1 + DO i=1-OLx,sNx+OLx-1 + dudx(i,j) = _recip_dxF(i,j,bi,bj) * + & (uFld(i+1,j,bi,bj)-uFld(i,j,bi,bj)) + uave(i,j) = 0.5 _d 0 * (uFld(i,j,bi,bj)+uFld(i+1,j,bi,bj)) + ENDDO + ENDDO + DO j=1-OLy,sNy+OLy-1 + DO i=1-OLx,sNx+OLx-1 + dvdy(i,j) = _recip_dyF(i,j,bi,bj) * + & (vFld(i,j+1,bi,bj)-vFld(i,j,bi,bj)) + vave(i,j) = 0.5 _d 0 * (vFld(i,j,bi,bj)+vFld(i,j+1,bi,bj)) + ENDDO + ENDDO +C evaluate strain rates at C-points + DO j=1-OLy,sNy+OLy-1 + DO i=1-OLx,sNx+OLx-1 + e11Loc(i,j,bi,bj) = dudx(i,j) + vave(i,j) * k2AtC(i,j,bi,bj) + e22Loc(i,j,bi,bj) = dvdy(i,j) + uave(i,j) * k1AtC(i,j,bi,bj) + ENDDO + ENDDO +#ifndef OBCS_UVICE_OLD +C-- for OBCS: assume no gradient beyong OB + DO j=1-OLy,sNy+OLy-1 + DO i=1-OLx,sNx+OLx-1 + e11Loc(i,j,bi,bj) = e11Loc(i,j,bi,bj)*maskInC(i,j,bi,bj) + e22Loc(i,j,bi,bj) = e22Loc(i,j,bi,bj)*maskInC(i,j,bi,bj) + ENDDO + ENDDO +#endif /* OBCS_UVICE_OLD */ + +C abbreviations at Z-points, need to do them in separate loops +C for vectorization + DO j=1-OLy+1,sNy+OLy + DO i=1-OLx+1,sNx+OLx + dudy(i,j) = ( uFld(i,j,bi,bj) - uFld(i ,j-1,bi,bj) ) + & * _recip_dyU(i,j,bi,bj) + uave(i,j) = 0.5 _d 0 * (uFld(i,j,bi,bj)+uFld(i ,j-1,bi,bj)) + ENDDO + ENDDO + DO j=1-OLy+1,sNy+OLy + DO i=1-OLx+1,sNx+OLx + dvdx(i,j) = ( vFld(i,j,bi,bj) - vFld(i-1,j ,bi,bj) ) + & * _recip_dxV(i,j,bi,bj) + vave(i,j) = 0.5 _d 0 * (vFld(i,j,bi,bj)+vFld(i-1,j ,bi,bj)) + ENDDO + ENDDO +C evaluate strain rates at Z-points + DO j=1-OLy+1,sNy+OLy + DO i=1-OLx+1,sNx+OLx + hFacU = _maskW(i,j,k,bi,bj) - _maskW(i,j-1,k,bi,bj) + hFacV = _maskS(i,j,k,bi,bj) - _maskS(i-1,j,k,bi,bj) + e12Loc(i,j,bi,bj) = 0.5 _d 0 * ( + & dudy(i,j) + dvdx(i,j) + & - k1AtZ(i,j,bi,bj) * vave(i,j) + & - k2AtZ(i,j,bi,bj) * uave(i,j) + & ) + & *maskC(i ,j ,k,bi,bj)*maskC(i-1,j ,k,bi,bj) + & *maskC(i ,j-1,k,bi,bj)*maskC(i-1,j-1,k,bi,bj) + & + noSlipFac * ( + & 2.0 _d 0 * uave(i,j) * _recip_dyU(i,j,bi,bj) * hFacU + & + 2.0 _d 0 * vave(i,j) * _recip_dxV(i,j,bi,bj) * hFacV & ) - & *maskC(I ,J ,k,bi,bj)*maskC(I-1,J ,k,bi,bj) - & *maskC(I ,J-1,k,bi,bj)*maskC(I-1,J-1,k,bi,bj) -C one metric term is missing - ENDDO - ENDDO - IF ( SEAICE_no_slip ) THEN -C no slip boundary conditions apply only to e12 - DO j=1-Oly+1,sNy+Oly - DO i=1-Olx+1,sNx+Olx - hFacU = _maskW(i,j,k,bi,bj) - _maskW(i,j-1,k,bi,bj) - hFacV = _maskS(i,j,k,bi,bj) - _maskS(i-1,j,k,bi,bj) - - e12(I,J,bi,bj) = e12(I,J,bi,bj) - & + recip_rAz(i,j,bi,bj) * 2. _d 0 * - & ( hFacU * ( _dxC(i,j-1,bi,bj)*uFld(i,j ,1,bi,bj) - & + _dxC(i,j, bi,bj)*uFld(i,j-1,1,bi,bj) ) - & + hFacV * ( _dyC(i-1,j,bi,bj)*vFld(i ,j,1,bi,bj) - & + _dyC(i, j,bi,bj)*vFld(i-1,j,1,bi,bj) ) ) - & - hFacU - & * 0.25 _d 0 * (uFld(I,J,1,bi,bj)+uFld(I ,J-1,1,bi,bj)) - & * ( _tanPhiAtU(I,J,bi,bj) + _tanPhiAtU(I,J-1,bi,bj) ) - & *recip_rSphere -C one metric term is missing - ENDDO +C no slip at the boundary implies u(j)+u(j-1)=0 and v(i)+v(i-1)=0 +C accross the boundary; this is already accomplished by masking so +C that the following lines are not necessary +c$$$ & - hFacV * k1AtZ(i,j,bi,bj) * vave(i,j) +c$$$ & - hFacU * k2AtZ(i,j,bi,bj) * uave(i,j) ENDDO + ENDDO - ENDIF ENDDO ENDDO + +#ifdef ALLOW_AUTODIFF_TAMC +#ifdef SEAICE_DYN_STABLE_ADJOINT +cgf zero out adjoint fields to stabilize pkg/seaice dyna. adjoint + CALL ZERO_ADJ( 1, e11Loc, myThid) + CALL ZERO_ADJ( 1, e12Loc, myThid) + CALL ZERO_ADJ( 1, e22Loc, myThid) +#endif +#endif /* ALLOW_AUTODIFF_TAMC */ + #endif /* SEAICE_ALLOW_DYNAMICS */ #endif /* SEAICE_CGRID */ RETURN