1 |
C $Header: /u/gcmpack/MITgcm/pkg/shap_filt/shap_filt_tracer_s2g.F,v 1.2 2001/05/29 14:01:40 adcroft Exp $ |
2 |
C $Name: $ |
3 |
|
4 |
#include "SHAP_FILT_OPTIONS.h" |
5 |
|
6 |
CBOP |
7 |
C !ROUTINE: SHAP_FILT_TRACER_S2G |
8 |
C !INTERFACE: |
9 |
SUBROUTINE SHAP_FILT_TRACER_S2G( |
10 |
U field, tmpFld, |
11 |
I kSize, myTime, myThid ) |
12 |
C !DESCRIPTION: \bv |
13 |
C *==========================================================* |
14 |
C | S/R SHAP_FILT_TRACER_S2G |
15 |
C | o Applies Shapiro filter to tracer field (cell center). |
16 |
C | o use filtering function "S2" = [1 - (d_xx+d_yy)^n] |
17 |
C | with grid spacing (physical space filter) |
18 |
C *==========================================================* |
19 |
C \ev |
20 |
|
21 |
C !USES: |
22 |
IMPLICIT NONE |
23 |
|
24 |
C == Global variables === |
25 |
#include "SIZE.h" |
26 |
#include "EEPARAMS.h" |
27 |
#include "PARAMS.h" |
28 |
#include "GRID.h" |
29 |
#include "SHAP_FILT.h" |
30 |
|
31 |
C !INPUT/OUTPUT PARAMETERS: |
32 |
C == Routine arguments |
33 |
C field :: cell-centered 2D field on which filter applies |
34 |
C tmpFld :: working temporary array |
35 |
C kSize :: length of 3rd Dim : either =1 (2D field) or =Nr (3D field) |
36 |
C myTime :: Current time in simulation |
37 |
C myThid :: Thread number for this instance of SHAP_FILT_TRACER_S2G |
38 |
INTEGER kSize |
39 |
_RL field(1-OLx:sNx+OLx,1-OLy:sNy+OLy,kSize,nSx,nSy) |
40 |
_RL tmpFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,kSize,nSx,nSy) |
41 |
_RL myTime |
42 |
INTEGER myThid |
43 |
|
44 |
#ifdef ALLOW_SHAP_FILT |
45 |
|
46 |
C !LOCAL VARIABLES: |
47 |
C == Local variables == |
48 |
INTEGER bi,bj,K,I,J,N |
49 |
_RL tmpGrd(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
50 |
CEOP |
51 |
|
52 |
IF (nShapT.gt.0) THEN |
53 |
|
54 |
DO bj=myByLo(myThid),myByHi(myThid) |
55 |
DO bi=myBxLo(myThid),myBxHi(myThid) |
56 |
DO K=1,kSize |
57 |
DO J=1-OLy,sNy+OLy |
58 |
DO I=1-OLx,sNx+OLx |
59 |
tmpFld(i,j,k,bi,bj)=field(i,j,k,bi,bj) |
60 |
ENDDO |
61 |
ENDDO |
62 |
ENDDO |
63 |
ENDDO |
64 |
ENDDO |
65 |
|
66 |
|
67 |
C ( d_xx +d_yy )^n tmpFld |
68 |
|
69 |
DO N=1,nShapT |
70 |
|
71 |
IF (kSize.EQ.Nr) THEN |
72 |
_EXCH_XYZ_R8( tmpFld, myThid ) |
73 |
ELSE |
74 |
_EXCH_XY_R8( tmpFld, myThid ) |
75 |
ENDIF |
76 |
|
77 |
DO bj=myByLo(myThid),myByHi(myThid) |
78 |
DO bi=myBxLo(myThid),myBxHi(myThid) |
79 |
DO K=1,kSize |
80 |
|
81 |
DO J=1,sNy |
82 |
DO I=1,sNx |
83 |
tmpGrd(i,j) = -0.125*( |
84 |
& ( tmpFld(i+1,j,k,bi,bj)-tmpFld( i ,j,k,bi,bj) ) |
85 |
& *_hFacW(i+1,j,k,bi,bj) |
86 |
& *DYG(i+1,j,bi,bj) |
87 |
& *recip_DXC(i+1,j,bi,bj) |
88 |
& -( tmpFld( i ,j,k,bi,bj)-tmpFld(i-1,j,k,bi,bj) ) |
89 |
& *_hFacW( i ,j,k,bi,bj) |
90 |
& *DYG( i ,j,bi,bj) |
91 |
& *recip_DXC( i ,j,bi,bj) |
92 |
& +( tmpFld(i,j+1,k,bi,bj)-tmpFld(i, j ,k,bi,bj) ) |
93 |
& *_hFacS(i,j+1,k,bi,bj) |
94 |
& *DXG(i,j+1,bi,bj) |
95 |
& *recip_DYC(i,j+1,bi,bj) |
96 |
& -( tmpFld(i, j ,k,bi,bj)-tmpFld(i,j-1,k,bi,bj) ) |
97 |
& *_hFacS(i, j ,k,bi,bj) |
98 |
& *DXG(i, j ,bi,bj) |
99 |
& *recip_DYC(i, j ,bi,bj) |
100 |
& )*recip_hFacC(i,j,k,bi,bj) |
101 |
ENDDO |
102 |
ENDDO |
103 |
|
104 |
IF (Shap_TrLength.EQ.0.) THEN |
105 |
DO J=1,sNy |
106 |
DO I=1,sNx |
107 |
tmpFld(i,j,k,bi,bj) = tmpGrd(i,j) |
108 |
ENDDO |
109 |
ENDDO |
110 |
ELSE |
111 |
DO J=1,sNy |
112 |
DO I=1,sNx |
113 |
tmpFld(i,j,k,bi,bj) = tmpGrd(i,j) |
114 |
& *recip_rA(i,j,bi,bj) |
115 |
& *Shap_TrLength*Shap_TrLength |
116 |
ENDDO |
117 |
ENDDO |
118 |
ENDIF |
119 |
|
120 |
ENDDO |
121 |
ENDDO |
122 |
ENDDO |
123 |
|
124 |
ENDDO |
125 |
|
126 |
C F <- [1 - (d_xx+d_yy)^n *deltaT/tau].F |
127 |
DO bj=myByLo(myThid),myByHi(myThid) |
128 |
DO bi=myBxLo(myThid),myBxHi(myThid) |
129 |
DO K=1,kSize |
130 |
DO J=1,sNy |
131 |
DO I=1,sNx |
132 |
field(i,j,k,bi,bj)=field(i,j,k,bi,bj) |
133 |
& -deltaTtracer/Shap_Trtau*tmpFld(i,j,k,bi,bj) |
134 |
ENDDO |
135 |
ENDDO |
136 |
ENDDO |
137 |
ENDDO |
138 |
ENDDO |
139 |
|
140 |
IF (kSize.EQ.Nr) THEN |
141 |
_EXCH_XYZ_R8( field, myThid ) |
142 |
ELSEIF (kSize.EQ.1) THEN |
143 |
_EXCH_XY_R8( field, myThid ) |
144 |
ELSE |
145 |
STOP 'S/R SHAP_FILT_TRACER_S4: kSize is wrong' |
146 |
ENDIF |
147 |
|
148 |
ENDIF |
149 |
#endif /* ALLOW_SHAP_FILT */ |
150 |
|
151 |
RETURN |
152 |
END |