/[MITgcm]/MITgcm/model/src/ini_cartesian_grid.F
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revision 1.3 by cnh, Fri Apr 24 02:10:20 1998 UTC revision 1.13 by adcroft, Mon Mar 27 22:25:44 2000 UTC
# Line 1  Line 1 
1  C $Header$  C $Header$
2    
3  #include "CPP_EEOPTIONS.h"  #include "CPP_OPTIONS.h"
4    
5  CStartOfInterface  CStartOfInterface
6        SUBROUTINE INI_CARTESIAN_GRID( myThid )        SUBROUTINE INI_CARTESIAN_GRID( myThid )
# Line 33  C     | Under the cartesian grid mode pr Line 33  C     | Under the cartesian grid mode pr
33  C     | and Y are in metres. Disktance in Z are in m or Pa       |  C     | and Y are in metres. Disktance in Z are in m or Pa       |
34  C     | depending on the vertical gridding mode.                 |  C     | depending on the vertical gridding mode.                 |
35  C     \==========================================================/  C     \==========================================================/
36          IMPLICIT NONE
37    
38  C     === Global variables ===  C     === Global variables ===
39  #include "SIZE.h"  #include "SIZE.h"
# Line 47  CEndOfInterface Line 48  CEndOfInterface
48    
49  C     == Local variables ==  C     == Local variables ==
50  C     xG, yG - Global coordinate location.  C     xG, yG - Global coordinate location.
 C     zG  
51  C     xBase  - South-west corner location for process.  C     xBase  - South-west corner location for process.
52  C     yBase  C     yBase
 C     zUpper - Work arrays for upper and lower  
 C     zLower   cell-face heights.  
 C     phi    - Temporary scalar  
53  C     xBase  - Temporaries for lower corner coordinate  C     xBase  - Temporaries for lower corner coordinate
54  C     yBase  C     yBase
55  C     iG, jG - Global coordinate index. Usually used to hold  C     iG, jG - Global coordinate index. Usually used to hold
# Line 61  C     bi,bj  - Loop counters Line 58  C     bi,bj  - Loop counters
58  C     zUpper - Temporary arrays holding z coordinates of  C     zUpper - Temporary arrays holding z coordinates of
59  C     zLower   upper and lower faces.  C     zLower   upper and lower faces.
60  C     I,J,K  C     I,J,K
61        _RL    xG, yG, zG        _RL    xG, yG
       _RL    phi  
       _RL    zUpper(Nz), zLower(Nz)  
62        _RL    xBase, yBase        _RL    xBase, yBase
63        INTEGER iG, jG        INTEGER iG, jG
64        INTEGER bi, bj        INTEGER bi, bj
65        INTEGER  I,  J, K        INTEGER  I,  J
66    
67  C--   Simple example of inialisation on cartesian grid  C--   Simple example of inialisation on cartesian grid
68  C--   First set coordinates of cell centers  C--   First set coordinates of cell centers
# Line 75  C     This operation is only performed a Line 70  C     This operation is only performed a
70  C     complex configurations it is usually OK to pass iG, jG to a custom  C     complex configurations it is usually OK to pass iG, jG to a custom
71  C     function and have it return xG and yG.  C     function and have it return xG and yG.
72  C     Set up my local grid first  C     Set up my local grid first
73          xC0 = 0. _d 0
74          yC0 = 0. _d 0
75        DO bj = myByLo(myThid), myByHi(myThid)        DO bj = myByLo(myThid), myByHi(myThid)
76         jG = myYGlobalLo + (bj-1)*sNy         jG = myYGlobalLo + (bj-1)*sNy
77         DO bi = myBxLo(myThid), myBxHi(myThid)         DO bi = myBxLo(myThid), myBxHi(myThid)
# Line 141  C     dxC, dyC is separation between cel Line 138  C     dxC, dyC is separation between cel
138         DO bi = myBxLo(myThid), myBxHi(myThid)         DO bi = myBxLo(myThid), myBxHi(myThid)
139          DO J=1,sNy          DO J=1,sNy
140           DO I=1,sNx           DO I=1,sNx
141            dxC(I,J,bi,bj)    = (dxF(I,J,bi,bj)+dxF(I-1,J,bi,bj))*0.5 D0            dxC(I,J,bi,bj)    = (dxF(I,J,bi,bj)+dxF(I-1,J,bi,bj))*0.5 _d 0
142            dyC(I,J,bi,bj)    = (dyF(I,J,bi,bj)+dyF(I,J-1,bi,bj))*0.5 D0            dyC(I,J,bi,bj)    = (dyF(I,J,bi,bj)+dyF(I,J-1,bi,bj))*0.5 _d 0
143           ENDDO           ENDDO
144          ENDDO          ENDDO
145         ENDDO         ENDDO
146        ENDDO        ENDDO
147        _EXCH_XY_R4(dxC, myThid )        _EXCH_XY_R4(dxC, myThid )
148        _EXCH_XY_R4(dyC, myThid )        _EXCH_XY_R4(dyC, myThid )
 C     Calculate recipricols  
       DO bj = myByLo(myThid), myByHi(myThid)  
        DO bi = myBxLo(myThid), myBxHi(myThid)  
         DO J=1,sNy  
          DO I=1,sNx  
           rDxG(I,J,bi,bj)=1.d0/dxG(I,J,bi,bj)  
           rDyG(I,J,bi,bj)=1.d0/dyG(I,J,bi,bj)  
           rDxC(I,J,bi,bj)=1.d0/dxC(I,J,bi,bj)  
           rDyC(I,J,bi,bj)=1.d0/dyC(I,J,bi,bj)  
           rDxF(I,J,bi,bj)=1.d0/dxF(I,J,bi,bj)  
           rDyF(I,J,bi,bj)=1.d0/dyF(I,J,bi,bj)  
           rDxV(I,J,bi,bj)=1.d0/dxV(I,J,bi,bj)  
           rDyU(I,J,bi,bj)=1.d0/dyU(I,J,bi,bj)  
          ENDDO  
         ENDDO  
        ENDDO  
       ENDDO  
       _EXCH_XY_R4(rDxG, myThid )  
       _EXCH_XY_R4(rDyG, myThid )  
       _EXCH_XY_R4(rDxC, myThid )  
       _EXCH_XY_R4(rDyC, myThid )  
       _EXCH_XY_R4(rDxF, myThid )  
       _EXCH_XY_R4(rDyF, myThid )  
       _EXCH_XY_R4(rDxV, myThid )  
       _EXCH_XY_R4(rDyU, myThid )  
149  C     Calculate vertical face area  C     Calculate vertical face area
150        DO bj = myByLo(myThid), myByHi(myThid)        DO bj = myByLo(myThid), myByHi(myThid)
151         DO bi = myBxLo(myThid), myBxHi(myThid)         DO bi = myBxLo(myThid), myBxHi(myThid)
152          DO J=1,sNy          DO J=1,sNy
153           DO I=1,sNx           DO I=1,sNx
154            zA(I,J,bi,bj) = dxF(I,J,bi,bj)*dyF(I,J,bi,bj)            rA (I,J,bi,bj) = dxF(I,J,bi,bj)*dyF(I,J,bi,bj)
155           ENDDO            rAw(I,J,bi,bj) = dxC(I,J,bi,bj)*dyG(I,J,bi,bj)
156          ENDDO            rAs(I,J,bi,bj) = dxG(I,J,bi,bj)*dyC(I,J,bi,bj)
157         ENDDO            tanPhiAtU(I,J,bi,bj) = 0. _d 0
158        ENDDO            tanPhiAtV(I,J,bi,bj) = 0. _d 0
   
       DO bj = myByLo(myThid), myByHi(myThid)  
        DO bi = myBxLo(myThid), myBxHi(myThid)  
         DO K=1,Nz  
          DO J=1,sNy  
           DO I=1,sNx  
            IF (HFacC(I,J,K,bi,bj) .NE. 0. D0 ) THEN  
             rHFacC(I,J,K,bi,bj) = 1. D0 / HFacC(I,J,K,bi,bj)  
            ELSE  
             rHFacC(I,J,K,bi,bj) = 0. D0  
            ENDIF  
            IF (HFacW(I,J,K,bi,bj) .NE. 0. D0 ) THEN  
             rHFacW(I,J,K,bi,bj) = 1. D0 / HFacW(I,J,K,bi,bj)  
             maskW(I,J,K,bi,bj) = 1. D0  
            ELSE  
             rHFacW(I,J,K,bi,bj) = 0. D0  
             maskW(I,J,K,bi,bj) = 0.0 D0  
            ENDIF  
            IF (HFacS(I,J,K,bi,bj) .NE. 0. D0 ) THEN  
             rHFacS(I,J,K,bi,bj) = 1. D0 / HFacS(I,J,K,bi,bj)  
             maskS(I,J,K,bi,bj) = 1. D0  
            ELSE  
             rHFacS(I,J,K,bi,bj) = 0. D0  
             maskS(I,J,K,bi,bj) = 0. D0  
            ENDIF  
           ENDDO  
159           ENDDO           ENDDO
160          ENDDO          ENDDO
161         ENDDO         ENDDO
162        ENDDO        ENDDO
163  C     Now sync. and get/send edge regions that are shared with        _EXCH_XY_R4 (rA       , myThid )
164  C     other threads.        _EXCH_XY_R4 (rAw      , myThid )
165        _EXCH_XYZ_R4(rHFacC    , myThid )        _EXCH_XY_R4 (rAs      , myThid )
166        _EXCH_XYZ_R4(rHFacW    , myThid )        _EXCH_XY_R4 (tanPhiAtU , myThid )
167        _EXCH_XYZ_R4(rHFacS    , myThid )        _EXCH_XY_R4 (tanPhiAtV , myThid )
       _EXCH_XYZ_R4(maskW    , myThid )  
       _EXCH_XYZ_R4(maskS    , myThid )  
168    
169  C  C
170        RETURN        RETURN
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