1 |
cnh |
1.4 |
C $Header: /u/gcmpack/models/MITgcmUV/model/src/ini_cartesian_grid.F,v 1.3 1998/04/24 02:10:20 cnh Exp $ |
2 |
cnh |
1.1 |
|
3 |
|
|
#include "CPP_EEOPTIONS.h" |
4 |
|
|
|
5 |
|
|
CStartOfInterface |
6 |
|
|
SUBROUTINE INI_CARTESIAN_GRID( myThid ) |
7 |
|
|
C /==========================================================\ |
8 |
|
|
C | SUBROUTINE INI_CARTESIAN_GRID | |
9 |
|
|
C | o Initialise model coordinate system | |
10 |
|
|
C |==========================================================| |
11 |
|
|
C | These arrays are used throughout the code in evaluating | |
12 |
|
|
C | gradients, integrals and spatial avarages. This routine | |
13 |
|
|
C | is called separately by each thread and initialise only | |
14 |
|
|
C | the region of the domain it is "responsible" for. | |
15 |
|
|
C | Notes: | |
16 |
|
|
C | Two examples are included. One illustrates the | |
17 |
|
|
C | initialisation of a cartesian grid. The other shows the | |
18 |
|
|
C | inialisation of a spherical polar grid. Other orthonormal| |
19 |
|
|
C | grids can be fitted into this design. In this case | |
20 |
|
|
C | custom metric terms also need adding to account for the | |
21 |
|
|
C | projections of velocity vectors onto these grids. | |
22 |
|
|
C | The structure used here also makes it possible to | |
23 |
|
|
C | implement less regular grid mappings. In particular | |
24 |
|
|
C | o Schemes which leave out blocks of the domain that are | |
25 |
|
|
C | all land could be supported. | |
26 |
|
|
C | o Multi-level schemes such as icosohedral or cubic | |
27 |
|
|
C | grid projections onto a sphere can also be fitted | |
28 |
|
|
C | within the strategy we use. | |
29 |
|
|
C | Both of the above also require modifying the support | |
30 |
|
|
C | routines that map computational blocks to simulation | |
31 |
|
|
C | domain blocks. | |
32 |
|
|
C | Under the cartesian grid mode primitive distances in X | |
33 |
|
|
C | and Y are in metres. Disktance in Z are in m or Pa | |
34 |
|
|
C | depending on the vertical gridding mode. | |
35 |
|
|
C \==========================================================/ |
36 |
|
|
|
37 |
|
|
C === Global variables === |
38 |
|
|
#include "SIZE.h" |
39 |
|
|
#include "EEPARAMS.h" |
40 |
|
|
#include "PARAMS.h" |
41 |
|
|
#include "GRID.h" |
42 |
|
|
|
43 |
|
|
C == Routine arguments == |
44 |
|
|
C myThid - Number of this instance of INI_CARTESIAN_GRID |
45 |
|
|
INTEGER myThid |
46 |
|
|
CEndOfInterface |
47 |
|
|
|
48 |
|
|
C == Local variables == |
49 |
|
|
C xG, yG - Global coordinate location. |
50 |
|
|
C zG |
51 |
|
|
C xBase - South-west corner location for process. |
52 |
|
|
C yBase |
53 |
|
|
C zUpper - Work arrays for upper and lower |
54 |
|
|
C zLower cell-face heights. |
55 |
|
|
C phi - Temporary scalar |
56 |
|
|
C xBase - Temporaries for lower corner coordinate |
57 |
|
|
C yBase |
58 |
|
|
C iG, jG - Global coordinate index. Usually used to hold |
59 |
|
|
C the south-west global coordinate of a tile. |
60 |
|
|
C bi,bj - Loop counters |
61 |
|
|
C zUpper - Temporary arrays holding z coordinates of |
62 |
|
|
C zLower upper and lower faces. |
63 |
|
|
C I,J,K |
64 |
|
|
_RL xG, yG, zG |
65 |
|
|
_RL phi |
66 |
|
|
_RL zUpper(Nz), zLower(Nz) |
67 |
|
|
_RL xBase, yBase |
68 |
|
|
INTEGER iG, jG |
69 |
|
|
INTEGER bi, bj |
70 |
|
|
INTEGER I, J, K |
71 |
|
|
|
72 |
|
|
C-- Simple example of inialisation on cartesian grid |
73 |
|
|
C-- First set coordinates of cell centers |
74 |
|
|
C This operation is only performed at start up so for more |
75 |
|
|
C complex configurations it is usually OK to pass iG, jG to a custom |
76 |
|
|
C function and have it return xG and yG. |
77 |
|
|
C Set up my local grid first |
78 |
|
|
DO bj = myByLo(myThid), myByHi(myThid) |
79 |
|
|
jG = myYGlobalLo + (bj-1)*sNy |
80 |
|
|
DO bi = myBxLo(myThid), myBxHi(myThid) |
81 |
|
|
iG = myXGlobalLo + (bi-1)*sNx |
82 |
|
|
yBase = 0. _d 0 |
83 |
|
|
xBase = 0. _d 0 |
84 |
|
|
DO i=1,iG-1 |
85 |
|
|
xBase = xBase + delX(i) |
86 |
|
|
ENDDO |
87 |
|
|
DO j=1,jG-1 |
88 |
|
|
yBase = yBase + delY(j) |
89 |
|
|
ENDDO |
90 |
|
|
yG = yBase |
91 |
|
|
DO J=1,sNy |
92 |
|
|
xG = xBase |
93 |
|
|
DO I=1,sNx |
94 |
|
|
xc(I,J,bi,bj) = xG + delX(iG+i-1)*0.5 _d 0 |
95 |
|
|
yc(I,J,bi,bj) = yG + delY(jG+j-1)*0.5 _d 0 |
96 |
|
|
xG = xG + delX(iG+I-1) |
97 |
|
|
dxF(I,J,bi,bj) = delX(iG+i-1) |
98 |
|
|
dyF(I,J,bi,bj) = delY(jG+j-1) |
99 |
|
|
ENDDO |
100 |
|
|
yG = yG + delY(jG+J-1) |
101 |
|
|
ENDDO |
102 |
|
|
ENDDO |
103 |
|
|
ENDDO |
104 |
|
|
C Now sync. and get edge regions from other threads and/or processes. |
105 |
|
|
C Note: We could just set the overlap regions ourselves here but |
106 |
|
|
C exchanging edges is safer and is good practice! |
107 |
|
|
_EXCH_XY_R4( xc, myThid ) |
108 |
|
|
_EXCH_XY_R4( yc, myThid ) |
109 |
|
|
_EXCH_XY_R4(dxF, myThid ) |
110 |
|
|
_EXCH_XY_R4(dyF, myThid ) |
111 |
|
|
|
112 |
|
|
C-- Calculate separation between other points |
113 |
|
|
C dxG, dyG are separations between cell corners along cell faces. |
114 |
|
|
DO bj = myByLo(myThid), myByHi(myThid) |
115 |
|
|
DO bi = myBxLo(myThid), myBxHi(myThid) |
116 |
|
|
DO J=1,sNy |
117 |
|
|
DO I=1,sNx |
118 |
|
|
dxG(I,J,bi,bj) = (dxF(I,J,bi,bj)+dxF(I,J-1,bi,bj))*0.5 _d 0 |
119 |
|
|
dyG(I,J,bi,bj) = (dyF(I,J,bi,bj)+dyF(I-1,J,bi,bj))*0.5 _d 0 |
120 |
|
|
ENDDO |
121 |
|
|
ENDDO |
122 |
|
|
ENDDO |
123 |
|
|
ENDDO |
124 |
|
|
_EXCH_XY_R4(dxG, myThid ) |
125 |
|
|
_EXCH_XY_R4(dyG, myThid ) |
126 |
|
|
C dxV, dyU are separations between velocity points along cell faces. |
127 |
|
|
DO bj = myByLo(myThid), myByHi(myThid) |
128 |
|
|
DO bi = myBxLo(myThid), myBxHi(myThid) |
129 |
|
|
DO J=1,sNy |
130 |
|
|
DO I=1,sNx |
131 |
|
|
dxV(I,J,bi,bj) = (dxG(I,J,bi,bj)+dxG(I-1,J,bi,bj))*0.5 _d 0 |
132 |
|
|
dyU(I,J,bi,bj) = (dyG(I,J,bi,bj)+dyG(I,J-1,bi,bj))*0.5 _d 0 |
133 |
|
|
ENDDO |
134 |
|
|
ENDDO |
135 |
|
|
ENDDO |
136 |
|
|
ENDDO |
137 |
|
|
_EXCH_XY_R4(dxV, myThid ) |
138 |
|
|
_EXCH_XY_R4(dyU, myThid ) |
139 |
|
|
C dxC, dyC is separation between cell centers |
140 |
|
|
DO bj = myByLo(myThid), myByHi(myThid) |
141 |
|
|
DO bi = myBxLo(myThid), myBxHi(myThid) |
142 |
|
|
DO J=1,sNy |
143 |
|
|
DO I=1,sNx |
144 |
|
|
dxC(I,J,bi,bj) = (dxF(I,J,bi,bj)+dxF(I-1,J,bi,bj))*0.5 D0 |
145 |
|
|
dyC(I,J,bi,bj) = (dyF(I,J,bi,bj)+dyF(I,J-1,bi,bj))*0.5 D0 |
146 |
|
|
ENDDO |
147 |
|
|
ENDDO |
148 |
|
|
ENDDO |
149 |
|
|
ENDDO |
150 |
|
|
_EXCH_XY_R4(dxC, myThid ) |
151 |
|
|
_EXCH_XY_R4(dyC, myThid ) |
152 |
|
|
C Calculate recipricols |
153 |
|
|
DO bj = myByLo(myThid), myByHi(myThid) |
154 |
|
|
DO bi = myBxLo(myThid), myBxHi(myThid) |
155 |
|
|
DO J=1,sNy |
156 |
|
|
DO I=1,sNx |
157 |
|
|
rDxG(I,J,bi,bj)=1.d0/dxG(I,J,bi,bj) |
158 |
|
|
rDyG(I,J,bi,bj)=1.d0/dyG(I,J,bi,bj) |
159 |
|
|
rDxC(I,J,bi,bj)=1.d0/dxC(I,J,bi,bj) |
160 |
|
|
rDyC(I,J,bi,bj)=1.d0/dyC(I,J,bi,bj) |
161 |
|
|
rDxF(I,J,bi,bj)=1.d0/dxF(I,J,bi,bj) |
162 |
|
|
rDyF(I,J,bi,bj)=1.d0/dyF(I,J,bi,bj) |
163 |
|
|
rDxV(I,J,bi,bj)=1.d0/dxV(I,J,bi,bj) |
164 |
|
|
rDyU(I,J,bi,bj)=1.d0/dyU(I,J,bi,bj) |
165 |
|
|
ENDDO |
166 |
|
|
ENDDO |
167 |
|
|
ENDDO |
168 |
|
|
ENDDO |
169 |
|
|
_EXCH_XY_R4(rDxG, myThid ) |
170 |
|
|
_EXCH_XY_R4(rDyG, myThid ) |
171 |
|
|
_EXCH_XY_R4(rDxC, myThid ) |
172 |
|
|
_EXCH_XY_R4(rDyC, myThid ) |
173 |
|
|
_EXCH_XY_R4(rDxF, myThid ) |
174 |
|
|
_EXCH_XY_R4(rDyF, myThid ) |
175 |
|
|
_EXCH_XY_R4(rDxV, myThid ) |
176 |
|
|
_EXCH_XY_R4(rDyU, myThid ) |
177 |
|
|
C Calculate vertical face area |
178 |
|
|
DO bj = myByLo(myThid), myByHi(myThid) |
179 |
|
|
DO bi = myBxLo(myThid), myBxHi(myThid) |
180 |
|
|
DO J=1,sNy |
181 |
|
|
DO I=1,sNx |
182 |
|
|
zA(I,J,bi,bj) = dxF(I,J,bi,bj)*dyF(I,J,bi,bj) |
183 |
|
|
ENDDO |
184 |
|
|
ENDDO |
185 |
|
|
ENDDO |
186 |
|
|
ENDDO |
187 |
|
|
|
188 |
|
|
DO bj = myByLo(myThid), myByHi(myThid) |
189 |
|
|
DO bi = myBxLo(myThid), myBxHi(myThid) |
190 |
|
|
DO K=1,Nz |
191 |
|
|
DO J=1,sNy |
192 |
|
|
DO I=1,sNx |
193 |
|
|
IF (HFacC(I,J,K,bi,bj) .NE. 0. D0 ) THEN |
194 |
|
|
rHFacC(I,J,K,bi,bj) = 1. D0 / HFacC(I,J,K,bi,bj) |
195 |
|
|
ELSE |
196 |
|
|
rHFacC(I,J,K,bi,bj) = 0. D0 |
197 |
|
|
ENDIF |
198 |
|
|
IF (HFacW(I,J,K,bi,bj) .NE. 0. D0 ) THEN |
199 |
|
|
rHFacW(I,J,K,bi,bj) = 1. D0 / HFacW(I,J,K,bi,bj) |
200 |
|
|
maskW(I,J,K,bi,bj) = 1. D0 |
201 |
|
|
ELSE |
202 |
|
|
rHFacW(I,J,K,bi,bj) = 0. D0 |
203 |
|
|
maskW(I,J,K,bi,bj) = 0.0 D0 |
204 |
|
|
ENDIF |
205 |
|
|
IF (HFacS(I,J,K,bi,bj) .NE. 0. D0 ) THEN |
206 |
|
|
rHFacS(I,J,K,bi,bj) = 1. D0 / HFacS(I,J,K,bi,bj) |
207 |
|
|
maskS(I,J,K,bi,bj) = 1. D0 |
208 |
|
|
ELSE |
209 |
|
|
rHFacS(I,J,K,bi,bj) = 0. D0 |
210 |
|
|
maskS(I,J,K,bi,bj) = 0. D0 |
211 |
|
|
ENDIF |
212 |
|
|
ENDDO |
213 |
|
|
ENDDO |
214 |
|
|
ENDDO |
215 |
|
|
ENDDO |
216 |
|
|
ENDDO |
217 |
|
|
C Now sync. and get/send edge regions that are shared with |
218 |
|
|
C other threads. |
219 |
|
|
_EXCH_XYZ_R4(rHFacC , myThid ) |
220 |
|
|
_EXCH_XYZ_R4(rHFacW , myThid ) |
221 |
|
|
_EXCH_XYZ_R4(rHFacS , myThid ) |
222 |
|
|
_EXCH_XYZ_R4(maskW , myThid ) |
223 |
|
|
_EXCH_XYZ_R4(maskS , myThid ) |
224 |
cnh |
1.4 |
_EXCH_XY_R4 (zA , myThid ) |
225 |
cnh |
1.1 |
|
226 |
|
|
C |
227 |
|
|
RETURN |
228 |
|
|
END |