/[MITgcm]/MITgcm/pkg/mom_fluxform/mom_cdscheme.F
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revision 1.1.2.1 by adcroft, Wed Mar 28 19:51:14 2001 UTC revision 1.4 by jmc, Sat Feb 8 02:13:02 2003 UTC
# Line 3  C $Name$ Line 3  C $Name$
3    
4  #include "CPP_OPTIONS.h"  #include "CPP_OPTIONS.h"
5    
6    CBOP
7    C !ROUTINE: MOM_CDSCHEME
8    
9    C !INTERFACE: ==========================================================
10        SUBROUTINE MOM_CDSCHEME(        SUBROUTINE MOM_CDSCHEME(
11       I        bi,bj,k,phi_hyd,       I        bi,bj,k,phi_hyd,dPhiHydX,dPhiHydY,
12       I        myThid)       I        myThid)
13    
14        IMPLICIT NONE  C !DESCRIPTION:
15    C The C-D scheme. The less said the better :-)
16    
17    C !USES: ===============================================================
18  C     == Global variables ==  C     == Global variables ==
19          IMPLICIT NONE
20  #include "SIZE.h"  #include "SIZE.h"
21  #include "DYNVARS.h"  #include "DYNVARS.h"
22  #include "EEPARAMS.h"  #include "EEPARAMS.h"
# Line 17  C     == Global variables == Line 24  C     == Global variables ==
24  #include "GRID.h"  #include "GRID.h"
25  #include "SURFACE.h"  #include "SURFACE.h"
26    
27  C     == Routine arguments ==  C !INPUT PARAMETERS: ===================================================
28  C     myThid - Instance number for this innvocation of CALC_MOM_RHS  C  bi,bj                :: tile indices
29        INTEGER bi,bj,K  C  k                    :: vertical level
30    C  phi_hyd              :: hydrostatic pressure
31    C     dPhiHydX,Y        :: Gradient (X & Y dir.) of Hydrostatic Potential
32    C  myThid               :: thread number
33          INTEGER bi,bj,k
34        _RL phi_hyd(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)        _RL phi_hyd(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
35          _RL dPhiHydX(1-Olx:sNx+Olx,1-Oly:sNy+Oly)
36          _RL dPhiHydY(1-Olx:sNx+Olx,1-Oly:sNy+Oly)
37        INTEGER myThid        INTEGER myThid
38    
 #ifdef INCLUDE_CD_CODE  
39    
40  C     == Local variables ==  C !LOCAL VARIABLES: ====================================================
41    #ifdef INCLUDE_CD_CODE
42    C  i,j                  :: loop indices
43    C  pF                   :: pressure gradient
44    C  vF                   :: work space
45    C  aF                   :: work space
46        _RL pF(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL pF(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
47        _RL vF(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL vF(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
48        _RL aF(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL aF(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
49        INTEGER i,j,iMin,iMax,jMin,jMax        INTEGER i,j,iMin,iMax,jMin,jMax
50        _RL ab15,ab05        _RL ab15,ab05
51          _RL phxFac, phyFac
52    CEOP
53    
54  C     Compute ranges  C     Compute ranges
55        iMin=1-Olx+1        iMin=1-Olx+1
# Line 42  C     Adams-Bashforth weighting factors Line 61  C     Adams-Bashforth weighting factors
61        ab15   =  1.5 + abEps        ab15   =  1.5 + abEps
62        ab05   = -0.5 - abEps        ab05   = -0.5 - abEps
63    
64    C-- stagger time stepping: grad Phi_Hyp is not in gU,gV and needs to be added:
65          IF (.FALSE.) THEN
66    c     IF (staggerTimeStep) THEN
67            phxFac = pfFacMom
68            phyFac = pfFacMom
69          ELSE
70            phxFac = 0.
71            phyFac = 0.
72          ENDIF
73    
74  C     Pressure extrapolated forward in time  C     Pressure extrapolated forward in time
75        DO j=1-Oly,sNy+Oly        DO j=1-Oly,sNy+Oly
76         DO i=1-Olx,sNx+Olx         DO i=1-Olx,sNx+Olx
# Line 64  C--   Coriolis with CD scheme allowed Line 93  C--   Coriolis with CD scheme allowed
93  C     grady(p) + gV  C     grady(p) + gV
94        DO j=1-Oly+1,sNy+Oly        DO j=1-Oly+1,sNy+Oly
95         DO i=1-Olx,sNx+Olx         DO i=1-Olx,sNx+Olx
96          af(i,j) = -_maskS(i,j,k,bi,bj)          af(i,j) = -_maskS(i,j,k,bi,bj)*(
97       &            *_recip_dyC(i,j,bi,bj)       &            _recip_dyC(i,j,bi,bj)*(pf(i,j)-pf(i,j-1))
98       &            *(pf(i,j)-pf(i,j-1))       &           +phyFac*dPhiHydY(i,j) )
99       &            +gV(i,j,k,bi,bj)       &          + gV(i,j,k,bi,bj)
100         ENDDO         ENDDO
101        ENDDO        ENDDO
102  C     Average to Vd point and add coriolis  C     Average to Vd point and add coriolis
# Line 120  C--   Meridional velocity coriolis term Line 149  C--   Meridional velocity coriolis term
149  C     gradx(p)+gU  C     gradx(p)+gU
150        DO j=1-Oly,sNy+Oly        DO j=1-Oly,sNy+Oly
151         DO i=1-Olx+1,sNx+Olx         DO i=1-Olx+1,sNx+Olx
152          af(i,j) = -_maskW(i,j,k,bi,bj)          af(i,j) = -_maskW(i,j,k,bi,bj)*(
153       &            *_recip_dxC(i,j,bi,bj)*       &            _recip_dxC(i,j,bi,bj)*(pf(i,j)-pf(i-1,j))
154       &            (pf(i,j)-pf(i-1,j))       &           +phxFac*dPhiHydX(i,j) )
155       &            +gU(i,j,k,bi,bj)       &          + gU(i,j,k,bi,bj)
156         ENDDO         ENDDO
157        ENDDO        ENDDO
158  C     Average to Ud point and add coriolis  C     Average to Ud point and add coriolis
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