/[MITgcm]/MITgcm/pkg/seaice/seaice_calc_strainrates.F
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revision 1.7 by mlosch, Wed Sep 19 08:48:21 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 91  C     no slip boundary conditions apply Line 97  C     no slip boundary conditions apply
97             hFacV = _maskS(i,j,k,bi,bj) - _maskS(i-1,j,k,bi,bj)             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)             e12(I,J,bi,bj) = e12(I,J,bi,bj)
100       &          + recip_rAz(i,j,bi,bj) *       &          + recip_rAz(i,j,bi,bj) *
101       &          ( hFacU * ( _dxC(i,j-1,bi,bj)*uFld(i,j  ,bi,bj)       &          ( hFacU * ( _dxC(i,j-1,bi,bj)*uFld(i,j  ,bi,bj)
102       &                    + _dxC(i,j,  bi,bj)*uFld(i,j-1,bi,bj) )       &                    + _dxC(i,j,  bi,bj)*uFld(i,j-1,bi,bj) )
103       &          + hFacV * ( _dyC(i-1,j,bi,bj)*vFld(i  ,j,bi,bj)       &          + hFacV * ( _dyC(i-1,j,bi,bj)*vFld(i  ,j,bi,bj)
104       &                    + _dyC(i,  j,bi,bj)*vFld(i-1,j,bi,bj) ) )       &                    + _dyC(i,  j,bi,bj)*vFld(i-1,j,bi,bj) ) )
105       &         - hFacU       &         - hFacU
106       &         * 0.25 _d 0 * (uFld(I,J,bi,bj)+uFld(I  ,J-1,bi,bj))       &         * 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) )       &         * ( _tanPhiAtU(I,J,bi,bj) + _tanPhiAtU(I,J-1,bi,bj) )
108       &         *recip_rSphere       &         *recip_rSphere
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