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#undef USE_BACKWARD_COMPATIBLE_GRID |
#undef USE_BACKWARD_COMPATIBLE_GRID |
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CStartOfInterface |
CBOP |
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C !ROUTINE: INI_SPHERICAL_POLAR_GRID |
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C !INTERFACE: |
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SUBROUTINE INI_SPHERICAL_POLAR_GRID( myThid ) |
SUBROUTINE INI_SPHERICAL_POLAR_GRID( myThid ) |
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C !DESCRIPTION: \bv |
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C /==========================================================\ |
C /==========================================================\ |
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C | SUBROUTINE INI_SPHERICAL_POLAR_GRID | |
C | SUBROUTINE INI_SPHERICAL_POLAR_GRID | |
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C | o Initialise model coordinate system | |
C | o Initialise model coordinate system arrays | |
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C |==========================================================| |
C |==========================================================| |
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C | These arrays are used throughout the code in evaluating | |
C | These arrays are used throughout the code in evaluating | |
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C | gradients, integrals and spatial avarages. This routine | |
C | gradients, integrals and spatial avarages. This routine | |
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C | is called separately by each thread and initialise only | |
C | is called separately by each thread and initialise only | |
| 20 |
C | the region of the domain it is "responsible" for. | |
C | the region of the domain it is "responsible" for. | |
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C | Notes: | |
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C | Two examples are included. One illustrates the | |
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C | initialisation of a cartesian grid. The other shows the | |
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C | inialisation of a spherical polar grid. Other orthonormal| |
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C | grids can be fitted into this design. In this case | |
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C | custom metric terms also need adding to account for the | |
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C | projections of velocity vectors onto these grids. | |
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C | The structure used here also makes it possible to | |
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C | implement less regular grid mappings. In particular | |
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C | o Schemes which leave out blocks of the domain that are | |
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C | all land could be supported. | |
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C | o Multi-level schemes such as icosohedral or cubic | |
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C | grid projections onto a sphere can also be fitted | |
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C | within the strategy we use. | |
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C | Both of the above also require modifying the support | |
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C | routines that map computational blocks to simulation | |
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C | domain blocks. | |
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| 21 |
C | Under the spherical polar grid mode primitive distances | |
C | Under the spherical polar grid mode primitive distances | |
| 22 |
C | in X and Y are in degrees. Distance in Z are in m or Pa | |
C | in X and Y are in degrees. Distance in Z are in m or Pa | |
| 23 |
C | depending on the vertical gridding mode. | |
C | depending on the vertical gridding mode. | |
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C \==========================================================/ |
C \==========================================================/ |
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IMPLICIT NONE |
C \ev |
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C !USES: |
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IMPLICIT NONE |
| 29 |
C === Global variables === |
C === Global variables === |
| 30 |
#include "SIZE.h" |
#include "SIZE.h" |
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#include "EEPARAMS.h" |
#include "EEPARAMS.h" |
| 32 |
#include "PARAMS.h" |
#include "PARAMS.h" |
| 33 |
#include "GRID.h" |
#include "GRID.h" |
| 34 |
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| 35 |
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C !INPUT/OUTPUT PARAMETERS: |
| 36 |
C == Routine arguments == |
C == Routine arguments == |
| 37 |
C myThid - Number of this instance of INI_CARTESIAN_GRID |
C myThid - Number of this instance of INI_CARTESIAN_GRID |
| 38 |
INTEGER myThid |
INTEGER myThid |
| 39 |
CEndOfInterface |
CEndOfInterface |
| 40 |
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| 41 |
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C !LOCAL VARIABLES: |
| 42 |
C == Local variables == |
C == Local variables == |
| 43 |
C xG, yG - Global coordinate location. |
C xG, yG - Global coordinate location. |
| 44 |
C xBase - South-west corner location for process. |
C xBase - South-west corner location for process. |
| 62 |
_RL lat, dlat, dlon, xG0, yG0 |
_RL lat, dlat, dlon, xG0, yG0 |
| 63 |
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| 64 |
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| 65 |
C "Long" real for temporary coordinate calculation |
C "Long" real for temporary coordinate calculation |
| 66 |
C NOTICE the extended range of indices!! |
C NOTICE the extended range of indices!! |
| 67 |
_RL xGloc(1-Olx:sNx+Olx+1,1-Oly:sNy+Oly+1) |
_RL xGloc(1-Olx:sNx+Olx+1,1-Oly:sNy+Oly+1) |
| 68 |
_RL yGloc(1-Olx:sNx+Olx+1,1-Oly:sNy+Oly+1) |
_RL yGloc(1-Olx:sNx+Olx+1,1-Oly:sNy+Oly+1) |
| 69 |
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| 70 |
C These functions return the "global" index with valid values beyond |
C The functions iGl, jGl return the "global" index with valid values beyond |
| 71 |
C halo regions |
C halo regions |
| 72 |
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C cnh wrote: |
| 73 |
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C > I dont understand why we would ever have to multiply the |
| 74 |
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C > overlap by the total domain size e.g |
| 75 |
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C > OLx*Nx, OLy*Ny. |
| 76 |
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C > Can anybody explain? Lines are in ini_spherical_polar_grid.F. |
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C > Surprised the code works if its wrong, so I am puzzled. |
| 78 |
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C jmc replied: |
| 79 |
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C Yes, I can explain this since I put this modification to work |
| 80 |
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C with small domain (where Oly > Ny, as for instance, zonal-average |
| 81 |
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C case): |
| 82 |
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C This has no effect on the acuracy of the evaluation of iGl(I,bi) |
| 83 |
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C and jGl(J,bj) since we take mod(a+OLx*Nx,Nx) and mod(b+OLy*Ny,Ny). |
| 84 |
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C But in case a or b is negative, then the FORTRAN function "mod" |
| 85 |
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C does not return the matematical value of the "modulus" function, |
| 86 |
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C and this is not good for your purpose. |
| 87 |
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C This is why I add +OLx*Nx and +OLy*Ny to be sure that the 1rst |
| 88 |
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C argument of the mod function is positive. |
| 89 |
INTEGER iGl,jGl |
INTEGER iGl,jGl |
| 90 |
iGl(I,bi) = 1+mod(myXGlobalLo-1+(bi-1)*sNx+I+Olx*Nx-1,Nx) |
iGl(I,bi) = 1+mod(myXGlobalLo-1+(bi-1)*sNx+I+Olx*Nx-1,Nx) |
| 91 |
jGl(J,bj) = 1+mod(myYGlobalLo-1+(bj-1)*sNy+J+Oly*Ny-1,Ny) |
jGl(J,bj) = 1+mod(myYGlobalLo-1+(bj-1)*sNy+J+Oly*Ny-1,Ny) |
| 92 |
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CEOP |
| 93 |
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| 94 |
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| 95 |
C For each tile ... |
C For each tile ... |
| 96 |
DO bj = myByLo(myThid), myByHi(myThid) |
DO bj = myByLo(myThid), myByHi(myThid) |
| 185 |
dlon = delX( iGl(I,bi) ) |
dlon = delX( iGl(I,bi) ) |
| 186 |
dlat = delY( jGl(J,bj) ) |
dlat = delY( jGl(J,bj) ) |
| 187 |
dXG(I,J,bi,bj) = rSphere*COS(deg2rad*lat)*dlon*deg2rad |
dXG(I,J,bi,bj) = rSphere*COS(deg2rad*lat)*dlon*deg2rad |
| 188 |
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if (dXG(I,J,bi,bj).LT.1.) dXG(I,J,bi,bj)=0. |
| 189 |
dYG(I,J,bi,bj) = rSphere*dlat*deg2rad |
dYG(I,J,bi,bj) = rSphere*dlat*deg2rad |
| 190 |
ENDDO |
ENDDO |
| 191 |
ENDDO |
ENDDO |
| 319 |
ENDDO |
ENDDO |
| 320 |
ENDDO |
ENDDO |
| 321 |
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| 322 |
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C-- Cosine(lat) scaling |
| 323 |
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DO J=1-OLy,sNy+OLy |
| 324 |
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jG = myYGlobalLo + (bj-1)*sNy + J-1 |
| 325 |
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jG = min(max(1,jG),Ny) |
| 326 |
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IF (cosPower.NE.0.) THEN |
| 327 |
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cosFacU(J,bi,bj)=COS(yC(1,J,bi,bj)*deg2rad) |
| 328 |
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& **cosPower |
| 329 |
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cosFacV(J,bi,bj)=COS((yC(1,J,bi,bj)-0.5*delY(jG))*deg2rad) |
| 330 |
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& **cosPower |
| 331 |
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sqcosFacU(J,bi,bj)=sqrt(cosFacU(J,bi,bj)) |
| 332 |
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sqcosFacV(J,bi,bj)=sqrt(cosFacV(J,bi,bj)) |
| 333 |
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ELSE |
| 334 |
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cosFacU(J,bi,bj)=1. |
| 335 |
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cosFacV(J,bi,bj)=1. |
| 336 |
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sqcosFacU(J,bi,bj)=1. |
| 337 |
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sqcosFacV(J,bi,bj)=1. |
| 338 |
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ENDIF |
| 339 |
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ENDDO |
| 340 |
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| 341 |
ENDDO ! bi |
ENDDO ! bi |
| 342 |
ENDDO ! bj |
ENDDO ! bj |
| 343 |
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