1 |
C $Header: /u/gcmpack/models/MITgcmUV/model/src/ini_masks_etc.F,v 1.3 1998/07/29 18:33:47 adcroft Exp $ |
2 |
|
3 |
#include "CPP_EEOPTIONS.h" |
4 |
|
5 |
CStartOfInterface |
6 |
SUBROUTINE INI_MASKS_ETC( myThid ) |
7 |
C /==========================================================\ |
8 |
C | SUBROUTINE INI_MASKS_ETC | |
9 |
C | o Initialise masks and topography factors | |
10 |
C |==========================================================| |
11 |
C | These arrays are used throughout the code and describe | |
12 |
C | the topography of the domain through masks (0s and 1s) | |
13 |
C | and fractional height factors (0<hFac<1). The latter | |
14 |
C | distinguish between the lopped-cell and full-step | |
15 |
C | topographic representations. | |
16 |
C \==========================================================/ |
17 |
|
18 |
C === Global variables === |
19 |
#include "SIZE.h" |
20 |
#include "EEPARAMS.h" |
21 |
#include "PARAMS.h" |
22 |
#include "GRID.h" |
23 |
|
24 |
C == Routine arguments == |
25 |
C myThid - Number of this instance of INI_CARTESIAN_GRID |
26 |
INTEGER myThid |
27 |
CEndOfInterface |
28 |
|
29 |
C == Local variables == |
30 |
C bi,bj - Loop counters |
31 |
C I,J,K |
32 |
INTEGER bi, bj |
33 |
INTEGER I, J, K |
34 |
|
35 |
C Calculate quantities derived from XY depth map |
36 |
DO bj = myByLo(myThid), myByHi(myThid) |
37 |
DO bi = myBxLo(myThid), myBxHi(myThid) |
38 |
DO J=1,sNy |
39 |
DO I=1,sNx |
40 |
C Inverse of depth |
41 |
IF ( h(i,j,bi,bj) .EQ. 0. _d 0 ) THEN |
42 |
recip_H(i,j,bi,bj) = 0. _d 0 |
43 |
ELSE |
44 |
recip_H(i,j,bi,bj) = 1. _d 0 / abs( H(i,j,bi,bj) ) |
45 |
ENDIF |
46 |
ENDDO |
47 |
ENDDO |
48 |
ENDDO |
49 |
ENDDO |
50 |
_EXCH_XY_R4( recip_H, myThid ) |
51 |
|
52 |
C Calculate lopping factor hFacC |
53 |
DO bj=myByLo(myThid), myByHi(myThid) |
54 |
DO bi=myBxLo(myThid), myBxHi(myThid) |
55 |
DO K=1, Nr |
56 |
DO J=1,sNy |
57 |
DO I=1,sNx |
58 |
IF ( H(I,J,bi,bj) .GE. rF(K) ) THEN |
59 |
C Top of cell is below base of domain |
60 |
hFacC(I,J,K,bi,bj) = 0. |
61 |
ELSEIF ( H(I,J,bi,bj) .LE. rF(K+1) ) THEN |
62 |
C Base of domain is below bottom of this cell |
63 |
hFacC(I,J,K,bi,bj) = 1. |
64 |
ELSE |
65 |
C Base of domain is in this cell |
66 |
C Set hFac to the fraction of the cell that is open. |
67 |
hFacC(I,J,K,bi,bj) = (rF(K)-H(I,J,bi,bj))*recip_drF(K) |
68 |
ENDIF |
69 |
C Impose minimum fraction |
70 |
IF (hFacC(I,J,K,bi,bj).LT.hFacMin) THEN |
71 |
IF (hFacC(I,J,K,bi,bj).LT.hFacMin*0.5) THEN |
72 |
hFacC(I,J,K,bi,bj)=0. |
73 |
ELSE |
74 |
hFacC(I,J,K,bi,bj)=hFacMin |
75 |
ENDIF |
76 |
ENDIF |
77 |
C Impose minimum size (dimensional) |
78 |
IF (drF(k)*hFacC(I,J,K,bi,bj).LT.hFacMinDz) THEN |
79 |
IF (drF(k)*hFacC(I,J,K,bi,bj).LT.hFacMinDz*0.5) THEN |
80 |
hFacC(I,J,K,bi,bj)=0. |
81 |
ELSE |
82 |
hFacC(I,J,K,bi,bj)=hFacMinDz*recip_drF(k) |
83 |
ENDIF |
84 |
ENDIF |
85 |
ENDDO |
86 |
ENDDO |
87 |
ENDDO |
88 |
ENDDO |
89 |
ENDDO |
90 |
_EXCH_XYZ_R4(hFacC , myThid ) |
91 |
|
92 |
C hFacW and hFacS (at U and V points) |
93 |
DO bj=myByLo(myThid), myByHi(myThid) |
94 |
DO bi=myBxLo(myThid), myBxHi(myThid) |
95 |
DO K=1, Nr |
96 |
DO J=1,sNy |
97 |
DO I=1,sNx |
98 |
hFacW(I,J,K,bi,bj)= |
99 |
& MIN(hFacC(I,J,K,bi,bj),hFacC(I-1,J,K,bi,bj)) |
100 |
hFacS(I,J,K,bi,bj)= |
101 |
& MIN(hFacC(I,J,K,bi,bj),hFacC(I,J-1,K,bi,bj)) |
102 |
ENDDO |
103 |
ENDDO |
104 |
ENDDO |
105 |
ENDDO |
106 |
ENDDO |
107 |
_EXCH_XYZ_R4(hFacW , myThid ) |
108 |
_EXCH_XYZ_R4(hFacS , myThid ) |
109 |
|
110 |
C Masks and reciprocals of hFac[CWS] |
111 |
DO bj = myByLo(myThid), myByHi(myThid) |
112 |
DO bi = myBxLo(myThid), myBxHi(myThid) |
113 |
DO K=1,Nr |
114 |
DO J=1,sNy |
115 |
DO I=1,sNx |
116 |
IF (HFacC(I,J,K,bi,bj) .NE. 0. D0 ) THEN |
117 |
recip_HFacC(I,J,K,bi,bj) = 1. D0 / HFacC(I,J,K,bi,bj) |
118 |
ELSE |
119 |
recip_HFacC(I,J,K,bi,bj) = 0. D0 |
120 |
ENDIF |
121 |
IF (HFacW(I,J,K,bi,bj) .NE. 0. D0 ) THEN |
122 |
recip_HFacW(I,J,K,bi,bj) = 1. D0 / HFacW(I,J,K,bi,bj) |
123 |
maskW(I,J,K,bi,bj) = 1. D0 |
124 |
ELSE |
125 |
recip_HFacW(I,J,K,bi,bj) = 0. D0 |
126 |
maskW(I,J,K,bi,bj) = 0.0 D0 |
127 |
ENDIF |
128 |
IF (HFacS(I,J,K,bi,bj) .NE. 0. D0 ) THEN |
129 |
recip_HFacS(I,J,K,bi,bj) = 1. D0 / HFacS(I,J,K,bi,bj) |
130 |
maskS(I,J,K,bi,bj) = 1. D0 |
131 |
ELSE |
132 |
recip_HFacS(I,J,K,bi,bj) = 0. D0 |
133 |
maskS(I,J,K,bi,bj) = 0. D0 |
134 |
ENDIF |
135 |
ENDDO |
136 |
ENDDO |
137 |
ENDDO |
138 |
ENDDO |
139 |
ENDDO |
140 |
_EXCH_XYZ_R4(recip_HFacC , myThid ) |
141 |
_EXCH_XYZ_R4(recip_HFacW , myThid ) |
142 |
_EXCH_XYZ_R4(recip_HFacS , myThid ) |
143 |
_EXCH_XYZ_R4(maskW , myThid ) |
144 |
_EXCH_XYZ_R4(maskS , myThid ) |
145 |
|
146 |
C Calculate recipricols grid lengths |
147 |
DO bj = myByLo(myThid), myByHi(myThid) |
148 |
DO bi = myBxLo(myThid), myBxHi(myThid) |
149 |
DO J=1,sNy |
150 |
DO I=1,sNx |
151 |
recip_dxG(I,J,bi,bj)=1.d0/dxG(I,J,bi,bj) |
152 |
recip_dyG(I,J,bi,bj)=1.d0/dyG(I,J,bi,bj) |
153 |
recip_dxC(I,J,bi,bj)=1.d0/dxC(I,J,bi,bj) |
154 |
recip_dyC(I,J,bi,bj)=1.d0/dyC(I,J,bi,bj) |
155 |
recip_dxF(I,J,bi,bj)=1.d0/dxF(I,J,bi,bj) |
156 |
recip_dyF(I,J,bi,bj)=1.d0/dyF(I,J,bi,bj) |
157 |
recip_dxV(I,J,bi,bj)=1.d0/dxV(I,J,bi,bj) |
158 |
recip_dyU(I,J,bi,bj)=1.d0/dyU(I,J,bi,bj) |
159 |
ENDDO |
160 |
ENDDO |
161 |
ENDDO |
162 |
ENDDO |
163 |
_EXCH_XY_R4(recip_dxG, myThid ) |
164 |
_EXCH_XY_R4(recip_dyG, myThid ) |
165 |
_EXCH_XY_R4(recip_dxC, myThid ) |
166 |
_EXCH_XY_R4(recip_dyC, myThid ) |
167 |
_EXCH_XY_R4(recip_dxF, myThid ) |
168 |
_EXCH_XY_R4(recip_dyF, myThid ) |
169 |
_EXCH_XY_R4(recip_dxV, myThid ) |
170 |
_EXCH_XY_R4(recip_dyU, myThid ) |
171 |
|
172 |
C |
173 |
RETURN |
174 |
END |