/[MITgcm]/MITgcm/pkg/seaice/seaice_calc_strainrates.F
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revision 1.1 by mlosch, Fri Apr 20 18:29:58 2007 UTC revision 1.6 by mlosch, Tue Jun 19 12:09:36 2007 UTC
# Line 44  CEndOfInterface Line 44  CEndOfInterface
44  C     === Local variables ===  C     === Local variables ===
45  C     i,j,bi,bj - Loop counters  C     i,j,bi,bj - Loop counters
46        INTEGER i, j, bi, bj        INTEGER i, j, bi, bj
47    C  hFacU, hFacV - determine the no-slip boundary condition
48          INTEGER k
49          _RS hFacU, hFacV
50    
51          k = 1
52  C  C
53        DO bj=myByLo(myThid),myByHi(myThid)        DO bj=myByLo(myThid),myByHi(myThid)
54         DO bi=myBxLo(myThid),myBxHi(myThid)         DO bi=myBxLo(myThid),myBxHi(myThid)
55          DO j=1-Oly+1,sNy+Oly-1          DO j=1-Oly,sNy+Oly-1
56           DO i=1-Olx+1,sNx+Olx-1           DO i=1-Olx,sNx+Olx-1
57  C NOW EVALUATE STRAIN RATES  C     evaluate strain rates
58            e11(I,J,bi,bj)= _recip_dxF(I,J,bi,bj) *            e11(I,J,bi,bj) = _recip_dxF(I,J,bi,bj) *
59       &         (uFld(I+1,J,bi,bj)-uFld(I,J,bi,bj))       &         (uFld(I+1,J,bi,bj)-uFld(I,J,bi,bj))
60       &         -HALF*       &         -HALF*
61       &         (vFld(I,J,bi,bj)+vFld(I,J+1,bi,bj))       &         (vFld(I,J,bi,bj)+vFld(I,J+1,bi,bj))
62       &         * _tanPhiAtU(I,J,bi,bj)*recip_rSphere       &         * _tanPhiAtU(I,J,bi,bj)*recip_rSphere
63            e22(I,J,bi,bj)= _recip_dyF(I,J,bi,bj) *            e22(I,J,bi,bj) = _recip_dyF(I,J,bi,bj) *
64       &         (vFld(I,J+1,bi,bj)-vFld(I,J,bi,bj))       &         (vFld(I,J+1,bi,bj)-vFld(I,J,bi,bj))
65  C     one metric term is missing  C     one metric term is missing
66            e12(I,J,bi,bj)=HALF*(           ENDDO
67            ENDDO
68            DO j=1-Oly+1,sNy+Oly
69             DO i=1-Olx+1,sNx+Olx
70              e12(I,J,bi,bj) = HALF*(
71       &         (uFld(I  ,J  ,bi,bj) * _dxC(I  ,J  ,bi,bj)       &         (uFld(I  ,J  ,bi,bj) * _dxC(I  ,J  ,bi,bj)
72       &         -uFld(I  ,J-1,bi,bj) * _dxC(I  ,J-1,bi,bj)       &         -uFld(I  ,J-1,bi,bj) * _dxC(I  ,J-1,bi,bj)
73       &         +vFld(I  ,J  ,bi,bj) * _dyC(I  ,J  ,bi,bj)       &         +vFld(I  ,J  ,bi,bj) * _dyC(I  ,J  ,bi,bj)
# Line 70  C     one metric term is missing Line 78  C     one metric term is missing
78       &         * ( _tanPhiAtU(I,J,bi,bj) + _tanPhiAtU(I,J-1,bi,bj) )       &         * ( _tanPhiAtU(I,J,bi,bj) + _tanPhiAtU(I,J-1,bi,bj) )
79       &         *recip_rSphere       &         *recip_rSphere
80       &         )       &         )
81         &         *maskC(I  ,J  ,k,bi,bj)*maskC(I-1,J  ,k,bi,bj)
82         &         *maskC(I  ,J-1,k,bi,bj)*maskC(I-1,J-1,k,bi,bj)
83  C     one metric term is missing  C     one metric term is missing
 CML          e12(I,J,bi,bj)=HALF*(  
 CML     &         (uFld(I,J+1,bi,bj)+uFld(I+1,J+1,bi,bj)  
 CML     &         -uFld(I,J-1,bi,bj)-uFld(I+1,J-1,bi,bj))  
 CML     &         * 1. _d 0 / (dyC(I,J,bi,bj) + dyC(I,J-1,bi,bj))  
 CML     &         +  
 CML     &         (vFld(I+1,J+1,bi,bj)+vFld(I+1,J,bi,bj)  
 CML     &         -vFld(I-1,J+1,bi,bj)-vFld(I-1,J,bi,bj))  
 CML     &         * 1. _d 0 / (dxC(I,J,bi,bj) + dxC(I-1,J,bi,bj))  
 CML     &         +HALF*  
 CML     &         (uFld(I,  J,  bi,bj)+uFld(I+1,J,  bi,bj))  
 CML     &         * _tanPhiAtU(I,J,bi,bj)*recip_rSphere)  
84           ENDDO           ENDDO
85          ENDDO          ENDDO
86            IF ( SEAICE_no_slip ) THEN
87    C     no slip boundary conditions apply only to e12
88             DO j=1-Oly+1,sNy+Oly
89              DO i=1-Olx+1,sNx+Olx
90               hFacU = _maskW(i,j,k,bi,bj) - _maskW(i,j-1,k,bi,bj)
91               hFacV = _maskS(i,j,k,bi,bj) - _maskS(i-1,j,k,bi,bj)
92    
93               e12(I,J,bi,bj) = e12(I,J,bi,bj)
94         &          + recip_rAz(i,j,bi,bj) *
95         &          ( hFacU * ( _dxC(i,j  ,bi,bj)*uFld(i,j  ,bi,bj)
96         &                    + _dxC(i,j-1,bi,bj)*uFld(i,j-1,bi,bj) )
97         &          + hFacV * ( _dyC(i  ,j,bi,bj)*vFld(i  ,j,bi,bj)
98         &                    + _dyC(i-1,j,bi,bj)*vFld(i-1,j,bi,bj) ) )
99         &         - hFacU
100         &         * 0.25 _d 0 * (uFld(I,J,bi,bj)+uFld(I  ,J-1,bi,bj))
101         &         * ( _tanPhiAtU(I,J,bi,bj) + _tanPhiAtU(I,J-1,bi,bj) )
102         &         *recip_rSphere
103    C     one metric term is missing
104              ENDDO
105             ENDDO
106    
107            ENDIF
108         ENDDO         ENDDO
109        ENDDO        ENDDO
110  #endif /* SEAICE_ALLOW_DYNAMICS */  #endif /* SEAICE_ALLOW_DYNAMICS */
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