/[MITgcm]/MITgcm/pkg/seaice/seaice_calc_strainrates.F
ViewVC logotype

Diff of /MITgcm/pkg/seaice/seaice_calc_strainrates.F

Parent Directory Parent Directory | Revision Log Revision Log | View Revision Graph Revision Graph | View Patch Patch

revision 1.1 by mlosch, Fri Apr 20 18:29:58 2007 UTC revision 1.8 by jmc, Tue Nov 13 19:26:25 2007 UTC
# Line 4  C $Name$ Line 4  C $Name$
4  #include "SEAICE_OPTIONS.h"  #include "SEAICE_OPTIONS.h"
5    
6  CStartOfInterface  CStartOfInterface
7        SUBROUTINE SEAICE_CALC_STRAINRATES(        SUBROUTINE SEAICE_CALC_STRAINRATES(
8       I     uFld, vFld,       I     uFld, vFld,
9       O     e11, e22, e12,       O     e11, e22, e12,
10       I     myThid )       I     iStep, myTime, myIter, myThid )
11  C     /==========================================================\  C     /==========================================================\
12  C     | SUBROUTINE  SEAICE_CALC_STRAINRATES                      |  C     | SUBROUTINE  SEAICE_CALC_STRAINRATES                      |
13  C     | o compute strain rates from ice velocities               |  C     | o compute strain rates from ice velocities               |
# Line 28  C     === Global variables === Line 28  C     === Global variables ===
28  #endif  #endif
29    
30  C     === Routine arguments ===  C     === Routine arguments ===
31  C     myThid - Thread no. that called this routine.  C     iStep  :: Sub-time-step number
32    C     myTime :: Simulation time
33    C     myIter :: Simulation timestep number
34    C     myThid :: My Thread Id. number
35          INTEGER iStep
36          _RL     myTime
37          INTEGER myIter
38        INTEGER myThid        INTEGER myThid
39  C     ice velocities  C     ice velocities
40        _RL uFld(1-Olx:sNx+Olx,1-Oly:sNy+Oly,nSx,nSy)        _RL uFld(1-Olx:sNx+Olx,1-Oly:sNy+Oly,nSx,nSy)
# Line 44  CEndOfInterface Line 50  CEndOfInterface
50  C     === Local variables ===  C     === Local variables ===
51  C     i,j,bi,bj - Loop counters  C     i,j,bi,bj - Loop counters
52        INTEGER i, j, bi, bj        INTEGER i, j, bi, bj
53    C  hFacU, hFacV - determine the no-slip boundary condition
54          INTEGER k
55          _RS hFacU, hFacV
56    
57          k = 1
58  C  C
59        DO bj=myByLo(myThid),myByHi(myThid)        DO bj=myByLo(myThid),myByHi(myThid)
60         DO bi=myBxLo(myThid),myBxHi(myThid)         DO bi=myBxLo(myThid),myBxHi(myThid)
61          DO j=1-Oly+1,sNy+Oly-1          DO j=1-Oly,sNy+Oly-1
62           DO i=1-Olx+1,sNx+Olx-1           DO i=1-Olx,sNx+Olx-1
63  C NOW EVALUATE STRAIN RATES  C     evaluate strain rates
64            e11(I,J,bi,bj)= _recip_dxF(I,J,bi,bj) *            e11(I,J,bi,bj) = _recip_dxF(I,J,bi,bj) *
65       &         (uFld(I+1,J,bi,bj)-uFld(I,J,bi,bj))       &         (uFld(I+1,J,bi,bj)-uFld(I,J,bi,bj))
66       &         -HALF*       &         -HALF*
67       &         (vFld(I,J,bi,bj)+vFld(I,J+1,bi,bj))       &         (vFld(I,J,bi,bj)+vFld(I,J+1,bi,bj))
68       &         * _tanPhiAtU(I,J,bi,bj)*recip_rSphere       &         * _tanPhiAtU(I,J,bi,bj)*recip_rSphere
69            e22(I,J,bi,bj)= _recip_dyF(I,J,bi,bj) *            e22(I,J,bi,bj) = _recip_dyF(I,J,bi,bj) *
70       &         (vFld(I,J+1,bi,bj)-vFld(I,J,bi,bj))       &         (vFld(I,J+1,bi,bj)-vFld(I,J,bi,bj))
71  C     one metric term is missing  C     one metric term is missing
72            e12(I,J,bi,bj)=HALF*(           ENDDO
73            ENDDO
74            DO j=1-Oly+1,sNy+Oly
75             DO i=1-Olx+1,sNx+Olx
76              e12(I,J,bi,bj) = HALF*(
77       &         (uFld(I  ,J  ,bi,bj) * _dxC(I  ,J  ,bi,bj)       &         (uFld(I  ,J  ,bi,bj) * _dxC(I  ,J  ,bi,bj)
78       &         -uFld(I  ,J-1,bi,bj) * _dxC(I  ,J-1,bi,bj)       &         -uFld(I  ,J-1,bi,bj) * _dxC(I  ,J-1,bi,bj)
79       &         +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 84  C     one metric term is missing
84       &         * ( _tanPhiAtU(I,J,bi,bj) + _tanPhiAtU(I,J-1,bi,bj) )       &         * ( _tanPhiAtU(I,J,bi,bj) + _tanPhiAtU(I,J-1,bi,bj) )
85       &         *recip_rSphere       &         *recip_rSphere
86       &         )       &         )
87         &         *maskC(I  ,J  ,k,bi,bj)*maskC(I-1,J  ,k,bi,bj)
88         &         *maskC(I  ,J-1,k,bi,bj)*maskC(I-1,J-1,k,bi,bj)
89  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)  
90           ENDDO           ENDDO
91          ENDDO          ENDDO
92            IF ( SEAICE_no_slip ) THEN
93    C     no slip boundary conditions apply only to e12
94             DO j=1-Oly+1,sNy+Oly
95              DO i=1-Olx+1,sNx+Olx
96               hFacU = _maskW(i,j,k,bi,bj) - _maskW(i,j-1,k,bi,bj)
97               hFacV = _maskS(i,j,k,bi,bj) - _maskS(i-1,j,k,bi,bj)
98    
99               e12(I,J,bi,bj) = e12(I,J,bi,bj)
100         &          + recip_rAz(i,j,bi,bj) *
101         &          ( hFacU * ( _dxC(i,j-1,bi,bj)*uFld(i,j  ,bi,bj)
102         &                    + _dxC(i,j,  bi,bj)*uFld(i,j-1,bi,bj) )
103         &          + hFacV * ( _dyC(i-1,j,bi,bj)*vFld(i  ,j,bi,bj)
104         &                    + _dyC(i,  j,bi,bj)*vFld(i-1,j,bi,bj) ) )
105         &         - hFacU
106         &         * 0.25 _d 0 * (uFld(I,J,bi,bj)+uFld(I  ,J-1,bi,bj))
107         &         * ( _tanPhiAtU(I,J,bi,bj) + _tanPhiAtU(I,J-1,bi,bj) )
108         &         *recip_rSphere
109    C     one metric term is missing
110              ENDDO
111             ENDDO
112    
113            ENDIF
114         ENDDO         ENDDO
115        ENDDO        ENDDO
116  #endif /* SEAICE_ALLOW_DYNAMICS */  #endif /* SEAICE_ALLOW_DYNAMICS */
Legend:
Removed from v.1.1  
changed lines
  Added in v.1.8
  ViewVC Help
Powered by ViewVC 1.1.22