| 1 |
jmc |
1.24 |
C $Header: /u/gcmpack/MITgcm/model/src/ini_cartesian_grid.F,v 1.23 2011/12/12 19:01:01 jmc Exp $ |
| 2 |
adcroft |
1.16 |
C $Name: $ |
| 3 |
cnh |
1.1 |
|
| 4 |
cnh |
1.10 |
#include "CPP_OPTIONS.h" |
| 5 |
cnh |
1.1 |
|
| 6 |
cnh |
1.17 |
CBOP |
| 7 |
|
|
C !ROUTINE: INI_CARTESIAN_GRID |
| 8 |
|
|
C !INTERFACE: |
| 9 |
cnh |
1.1 |
SUBROUTINE INI_CARTESIAN_GRID( myThid ) |
| 10 |
jmc |
1.22 |
|
| 11 |
cnh |
1.17 |
C !DESCRIPTION: \bv |
| 12 |
|
|
C *==========================================================* |
| 13 |
jmc |
1.21 |
C | SUBROUTINE INI_CARTESIAN_GRID |
| 14 |
|
|
C | o Initialise model coordinate system |
| 15 |
cnh |
1.17 |
C *==========================================================* |
| 16 |
jmc |
1.21 |
C | The grid arrays, initialised here, are used throughout |
| 17 |
|
|
C | the code in evaluating gradients, integrals and spatial |
| 18 |
jmc |
1.23 |
C | avarages. This routine is called separately by each |
| 19 |
|
|
C | thread and initialises only the region of the domain |
| 20 |
|
|
C | it is "responsible" for. |
| 21 |
|
|
C | Under the cartesian grid mode primitive distances |
| 22 |
|
|
C | in X and Y are in metres. Distance in Z are in m or Pa |
| 23 |
jmc |
1.21 |
C | depending on the vertical gridding mode. |
| 24 |
cnh |
1.17 |
C *==========================================================* |
| 25 |
|
|
C \ev |
| 26 |
|
|
|
| 27 |
|
|
C !USES: |
| 28 |
adcroft |
1.12 |
IMPLICIT NONE |
| 29 |
cnh |
1.1 |
C === Global variables === |
| 30 |
|
|
#include "SIZE.h" |
| 31 |
|
|
#include "EEPARAMS.h" |
| 32 |
|
|
#include "PARAMS.h" |
| 33 |
|
|
#include "GRID.h" |
| 34 |
|
|
|
| 35 |
cnh |
1.17 |
C !INPUT/OUTPUT PARAMETERS: |
| 36 |
cnh |
1.1 |
C == Routine arguments == |
| 37 |
jmc |
1.23 |
C myThid :: my Thread Id Number |
| 38 |
cnh |
1.1 |
INTEGER myThid |
| 39 |
|
|
|
| 40 |
cnh |
1.17 |
C !LOCAL VARIABLES: |
| 41 |
cnh |
1.1 |
C == Local variables == |
| 42 |
jmc |
1.23 |
C bi,bj :: tile indices |
| 43 |
|
|
C i, j :: loop counters |
| 44 |
|
|
C delXloc :: mesh spacing in X direction |
| 45 |
|
|
C delYloc :: mesh spacing in Y direction |
| 46 |
|
|
C xGloc :: mesh corner-point location (local "Long" real array type) |
| 47 |
|
|
C yGloc :: mesh corner-point location (local "Long" real array type) |
| 48 |
|
|
INTEGER bi, bj |
| 49 |
|
|
INTEGER i, j |
| 50 |
|
|
INTEGER gridNx, gridNy |
| 51 |
|
|
C NOTICE the extended range of indices!! |
| 52 |
|
|
_RL delXloc(0-OLx:sNx+OLx) |
| 53 |
|
|
_RL delYloc(0-OLy:sNy+OLy) |
| 54 |
|
|
C NOTICE the extended range of indices!! |
| 55 |
|
|
_RL xGloc(1-OLx:sNx+OLx+1,1-OLy:sNy+OLy+1) |
| 56 |
|
|
_RL yGloc(1-OLx:sNx+OLx+1,1-OLy:sNy+OLy+1) |
| 57 |
cnh |
1.17 |
CEOP |
| 58 |
adcroft |
1.16 |
|
| 59 |
jmc |
1.23 |
C-- For each tile ... |
| 60 |
cnh |
1.1 |
DO bj = myByLo(myThid), myByHi(myThid) |
| 61 |
|
|
DO bi = myBxLo(myThid), myBxHi(myThid) |
| 62 |
adcroft |
1.16 |
|
| 63 |
jmc |
1.23 |
C-- set tile local mesh (same units as delX,deY) |
| 64 |
|
|
C corresponding to coordinates of cell corners for N+1 grid-lines |
| 65 |
|
|
|
| 66 |
|
|
CALL INI_LOCAL_GRID( |
| 67 |
|
|
O xGloc, yGloc, |
| 68 |
|
|
O delXloc, delYloc, |
| 69 |
|
|
O gridNx, gridNy, |
| 70 |
|
|
I bi, bj, myThid ) |
| 71 |
adcroft |
1.16 |
|
| 72 |
|
|
C-- Make a permanent copy of [xGloc,yGloc] in [xG,yG] |
| 73 |
jmc |
1.23 |
DO j=1-OLy,sNy+OLy |
| 74 |
|
|
DO i=1-OLx,sNx+OLx |
| 75 |
jmc |
1.22 |
xG(i,j,bi,bj) = xGloc(i,j) |
| 76 |
|
|
yG(i,j,bi,bj) = yGloc(i,j) |
| 77 |
adcroft |
1.16 |
ENDDO |
| 78 |
|
|
ENDDO |
| 79 |
|
|
|
| 80 |
|
|
C-- Calculate [xC,yC], coordinates of cell centers |
| 81 |
jmc |
1.23 |
DO j=1-OLy,sNy+OLy |
| 82 |
|
|
DO i=1-OLx,sNx+OLx |
| 83 |
adcroft |
1.16 |
C by averaging |
| 84 |
jmc |
1.22 |
xC(i,j,bi,bj) = 0.25 _d 0*( |
| 85 |
|
|
& xGloc(i,j)+xGloc(i+1,j)+xGloc(i,j+1)+xGloc(i+1,j+1) ) |
| 86 |
|
|
yC(i,j,bi,bj) = 0.25 _d 0*( |
| 87 |
|
|
& yGloc(i,j)+yGloc(i+1,j)+yGloc(i,j+1)+yGloc(i+1,j+1) ) |
| 88 |
adcroft |
1.16 |
ENDDO |
| 89 |
|
|
ENDDO |
| 90 |
|
|
|
| 91 |
|
|
C-- Calculate [dxF,dyF], lengths between cell faces (through center) |
| 92 |
jmc |
1.23 |
DO j=1-OLy,sNy+OLy |
| 93 |
|
|
DO i=1-OLx,sNx+OLx |
| 94 |
|
|
dxF(i,j,bi,bj) = delXloc(i) |
| 95 |
|
|
dyF(i,j,bi,bj) = delYloc(j) |
| 96 |
adcroft |
1.16 |
ENDDO |
| 97 |
|
|
ENDDO |
| 98 |
|
|
|
| 99 |
|
|
C-- Calculate [dxG,dyG], lengths along cell boundaries |
| 100 |
jmc |
1.23 |
DO j=1-OLy,sNy+OLy |
| 101 |
|
|
DO i=1-OLx,sNx+OLx |
| 102 |
|
|
dxG(i,j,bi,bj) = delXloc(i) |
| 103 |
|
|
dyG(i,j,bi,bj) = delYloc(j) |
| 104 |
adcroft |
1.16 |
ENDDO |
| 105 |
|
|
ENDDO |
| 106 |
|
|
|
| 107 |
|
|
C-- The following arrays are not defined in some parts of the halo |
| 108 |
|
|
C region. We set them to zero here for safety. If they are ever |
| 109 |
|
|
C referred to, especially in the denominator then it is a mistake! |
| 110 |
jmc |
1.23 |
DO j=1-OLy,sNy+OLy |
| 111 |
|
|
DO i=1-OLx,sNx+OLx |
| 112 |
jmc |
1.22 |
dxC(i,j,bi,bj) = 0. |
| 113 |
|
|
dyC(i,j,bi,bj) = 0. |
| 114 |
|
|
dxV(i,j,bi,bj) = 0. |
| 115 |
|
|
dyU(i,j,bi,bj) = 0. |
| 116 |
|
|
rAw(i,j,bi,bj) = 0. |
| 117 |
|
|
rAs(i,j,bi,bj) = 0. |
| 118 |
adcroft |
1.16 |
ENDDO |
| 119 |
|
|
ENDDO |
| 120 |
|
|
|
| 121 |
|
|
C-- Calculate [dxC], zonal length between cell centers |
| 122 |
jmc |
1.23 |
DO j=1-OLy,sNy+OLy |
| 123 |
|
|
DO i=1-OLx+1,sNx+OLx ! NOTE range |
| 124 |
jmc |
1.22 |
dxC(i,j,bi,bj) = 0.5 _d 0*(dxF(i,j,bi,bj)+dxF(i-1,j,bi,bj)) |
| 125 |
cnh |
1.1 |
ENDDO |
| 126 |
|
|
ENDDO |
| 127 |
adcroft |
1.16 |
|
| 128 |
|
|
C-- Calculate [dyC], meridional length between cell centers |
| 129 |
jmc |
1.23 |
DO j=1-OLy+1,sNy+OLy ! NOTE range |
| 130 |
|
|
DO i=1-OLx,sNx+OLx |
| 131 |
jmc |
1.22 |
dyC(i,j,bi,bj) = 0.5 _d 0*(dyF(i,j,bi,bj)+dyF(i,j-1,bi,bj)) |
| 132 |
cnh |
1.1 |
ENDDO |
| 133 |
|
|
ENDDO |
| 134 |
adcroft |
1.16 |
|
| 135 |
|
|
C-- Calculate [dxV,dyU], length between velocity points (through corners) |
| 136 |
jmc |
1.23 |
DO j=1-OLy+1,sNy+OLy ! NOTE range |
| 137 |
|
|
DO i=1-OLx+1,sNx+OLx ! NOTE range |
| 138 |
adcroft |
1.16 |
C by averaging (method I) |
| 139 |
jmc |
1.22 |
dxV(i,j,bi,bj) = 0.5 _d 0*(dxG(i,j,bi,bj)+dxG(i-1,j,bi,bj)) |
| 140 |
|
|
dyU(i,j,bi,bj) = 0.5 _d 0*(dyG(i,j,bi,bj)+dyG(i,j-1,bi,bj)) |
| 141 |
adcroft |
1.16 |
C by averaging (method II) |
| 142 |
jmc |
1.22 |
c dxV(i,j,bi,bj) = 0.5*(dxG(i,j,bi,bj)+dxG(i-1,j,bi,bj)) |
| 143 |
|
|
c dyU(i,j,bi,bj) = 0.5*(dyC(i,j,bi,bj)+dyC(i-1,j,bi,bj)) |
| 144 |
cnh |
1.1 |
ENDDO |
| 145 |
|
|
ENDDO |
| 146 |
adcroft |
1.16 |
|
| 147 |
jmc |
1.21 |
C-- Calculate vertical face area |
| 148 |
jmc |
1.23 |
DO j=1-OLy,sNy+OLy |
| 149 |
|
|
DO i=1-OLx,sNx+OLx |
| 150 |
jmc |
1.22 |
rA (i,j,bi,bj) = dxF(i,j,bi,bj)*dyF(i,j,bi,bj) |
| 151 |
|
|
rAw(i,j,bi,bj) = dxC(i,j,bi,bj)*dyG(i,j,bi,bj) |
| 152 |
|
|
rAs(i,j,bi,bj) = dxG(i,j,bi,bj)*dyC(i,j,bi,bj) |
| 153 |
|
|
rAz(i,j,bi,bj) = dxV(i,j,bi,bj)*dyU(i,j,bi,bj) |
| 154 |
jmc |
1.18 |
C-- Set trigonometric terms & grid orientation: |
| 155 |
jmc |
1.22 |
tanPhiAtU(i,j,bi,bj) = 0. |
| 156 |
|
|
tanPhiAtV(i,j,bi,bj) = 0. |
| 157 |
|
|
angleCosC(i,j,bi,bj) = 1. |
| 158 |
|
|
angleSinC(i,j,bi,bj) = 0. |
| 159 |
cnh |
1.6 |
ENDDO |
| 160 |
|
|
ENDDO |
| 161 |
cnh |
1.1 |
|
| 162 |
adcroft |
1.16 |
C-- Cosine(lat) scaling |
| 163 |
jmc |
1.22 |
DO j=1-OLy,sNy+OLy |
| 164 |
jmc |
1.23 |
cosFacU(j,bi,bj) = 1. |
| 165 |
|
|
cosFacV(j,bi,bj) = 1. |
| 166 |
jmc |
1.22 |
sqcosFacU(j,bi,bj)=1. |
| 167 |
|
|
sqcosFacV(j,bi,bj)=1. |
| 168 |
adcroft |
1.16 |
ENDDO |
| 169 |
|
|
|
| 170 |
jmc |
1.21 |
C-- end bi,bj loops |
| 171 |
|
|
ENDDO |
| 172 |
|
|
ENDDO |
| 173 |
adcroft |
1.16 |
|
| 174 |
cnh |
1.1 |
RETURN |
| 175 |
|
|
END |
Parent Directory
| 
Revision Log
| 
Revision Graph