/[MITgcm]/MITgcm/pkg/shap_filt/shap_filt_tracer_s4.F
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Contents of /MITgcm/pkg/shap_filt/shap_filt_tracer_s4.F

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Revision 1.3 - (show annotations) (download)
Mon Mar 4 01:32:55 2002 UTC (22 years, 2 months ago) by jmc
Branch: MAIN
CVS Tags: checkpoint46n_post, checkpoint51k_post, checkpoint47e_post, checkpoint52l_pre, hrcube4, hrcube5, checkpoint46l_post, checkpoint46g_pre, checkpoint47c_post, checkpoint50c_post, checkpoint46f_post, checkpoint52d_pre, checkpoint48e_post, checkpoint50c_pre, checkpoint44f_post, checkpoint46b_post, checkpoint52j_pre, checkpoint51o_pre, checkpoint51l_post, checkpoint48i_post, checkpoint46l_pre, checkpoint52l_post, checkpoint52k_post, checkpoint51, checkpoint50, checkpoint53, checkpoint52, checkpoint50d_post, checkpoint52f_post, checkpoint50b_pre, checkpoint51f_post, checkpoint48b_post, checkpoint51d_post, checkpoint48c_pre, checkpoint47d_pre, checkpoint51t_post, checkpoint51n_post, checkpoint52i_pre, hrcube_1, hrcube_2, hrcube_3, checkpoint51s_post, checkpoint47a_post, checkpoint48d_pre, checkpoint51j_post, checkpoint47i_post, checkpoint52e_pre, checkpoint52e_post, checkpoint51n_pre, checkpoint47d_post, checkpoint53d_post, checkpoint46d_pre, checkpoint48d_post, checkpoint48f_post, checkpoint45d_post, checkpoint52b_pre, checkpoint46j_pre, checkpoint51l_pre, checkpoint52m_post, checkpoint44h_pre, checkpoint48h_post, checkpoint51q_post, checkpoint51b_pre, checkpoint46a_post, checkpoint47g_post, checkpoint52b_post, checkpoint52c_post, checkpoint46j_post, checkpoint51h_pre, checkpoint46k_post, checkpoint48a_post, checkpoint45a_post, checkpoint50f_post, checkpoint50a_post, checkpoint50f_pre, checkpoint52f_pre, checkpoint47j_post, checkpoint53c_post, branch-exfmods-tag, checkpoint44g_post, branchpoint-genmake2, checkpoint46e_pre, checkpoint51r_post, checkpoint48c_post, checkpoint45b_post, checkpoint46b_pre, checkpoint51i_post, checkpoint51b_post, checkpoint51c_post, checkpoint46c_pre, checkpoint53a_post, checkpoint46, checkpoint47b_post, checkpoint46h_pre, checkpoint52d_post, checkpoint46m_post, checkpoint46a_pre, checkpoint50g_post, checkpoint45c_post, checkpoint44h_post, checkpoint46g_post, checkpoint52a_pre, checkpoint50h_post, checkpoint52i_post, checkpoint50e_pre, checkpoint50i_post, checkpoint51i_pre, checkpoint52h_pre, checkpoint53f_post, checkpoint52j_post, checkpoint47f_post, checkpoint50e_post, checkpoint46i_post, checkpoint46c_post, branch-netcdf, checkpoint50d_pre, checkpoint52n_post, checkpoint53b_pre, checkpoint46e_post, checkpoint51e_post, checkpoint47, checkpoint45, checkpoint48, checkpoint49, checkpoint46h_post, checkpoint51o_post, checkpoint51f_pre, checkpoint48g_post, checkpoint53b_post, checkpoint47h_post, checkpoint52a_post, checkpoint44f_pre, checkpoint51g_post, ecco_c52_e35, checkpoint46d_post, checkpoint50b_post, checkpoint51m_post, checkpoint53d_pre, checkpoint51a_post, checkpoint51p_post, checkpoint51u_post
Branch point for: branch-exfmods-curt, branch-genmake2, branch-nonh, tg2-branch, netcdf-sm0, checkpoint51n_branch
Changes since 1.2: +63 -30 lines 
o parameter Shap_noSlip replace CPP option NO_SLIP_SHAP
o add filter time scale (missing in some Shap_filt S/R)
o add exchange at the end (missing in some Shapi_filt S/R)
o working arrays (in common block SHAP_FILT.h) become argument
  of Shap_filt S/R.  => Enable to filter 2D fields.
1 C $Header: /u/gcmpack/MITgcm/pkg/shap_filt/shap_filt_tracer_s4.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_S4
8 C !INTERFACE:
9 SUBROUTINE SHAP_FILT_TRACER_S4(
10 U field, tmpFld,
11 I kSize, myTime, myThid )
12 C !DESCRIPTION: \bv
13 C *==========================================================*
14 C | S/R SHAP_FILT_TRACER_S4
15 C | o Applies Shapiro filter to tracer field (cell center).
16 C | o use filtering function "S4" = [1 - d_xx^n][1- d_yy^n]
17 C | with no grid spacing (computational 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_S4
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^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) = -0.25*(
84 & ( tmpFld(i+1,j,k,bi,bj)-tmpFld( i ,j,k,bi,bj) )
85 & *_maskW(i+1,j,k,bi,bj)
86 & -( tmpFld( i ,j,k,bi,bj)-tmpFld(i-1,j,k,bi,bj) )
87 & *_maskW(i,j,k,bi,bj) )
88 ENDDO
89 ENDDO
90
91 DO J=1,sNy
92 DO I=1,sNx
93 tmpFld(i,j,k,bi,bj) = tmpGrd(i,j)
94 ENDDO
95 ENDDO
96
97 ENDDO
98 ENDDO
99 ENDDO
100
101 ENDDO
102
103 C F <- [1 - d_xx^n *deltaT/tau].F
104 DO bj=myByLo(myThid),myByHi(myThid)
105 DO bi=myBxLo(myThid),myBxHi(myThid)
106 DO K=1,kSize
107 DO J=1,sNy
108 DO I=1,sNx
109 field(i,j,k,bi,bj)=field(i,j,k,bi,bj)
110 & -tmpFld(i,j,k,bi,bj)*deltaTtracer/Shap_Trtau
111 tmpFld(i,j,k,bi,bj)=field(i,j,k,bi,bj)
112 ENDDO
113 ENDDO
114 ENDDO
115 ENDDO
116 ENDDO
117
118
119 C d_yy^n tmpFld
120
121 DO N=1,nShapT
122
123 IF (kSize.EQ.1) THEN
124 _EXCH_XY_R8( tmpFld, myThid )
125 ELSE
126 _EXCH_XYZ_R8( tmpFld, myThid )
127 ENDIF
128
129 DO bj=myByLo(myThid),myByHi(myThid)
130 DO bi=myBxLo(myThid),myBxHi(myThid)
131 DO K=1,kSize
132
133 DO J=1,sNy
134 DO I=1,sNx
135 tmpGrd(i,j) = -0.25*(
136 & ( tmpFld(i,j+1,k,bi,bj)-tmpFld(i, j ,k,bi,bj) )
137 & *_maskS(i,j+1,k,bi,bj)
138 & -( tmpFld(i, j ,k,bi,bj)-tmpFld(i,j-1,k,bi,bj) )
139 & *_maskS(i,j,k,bi,bj) )
140 ENDDO
141 ENDDO
142
143 DO J=1,sNy
144 DO I=1,sNx
145 tmpFld(i,j,k,bi,bj) = tmpGrd(i,j)
146 ENDDO
147 ENDDO
148
149 ENDDO
150 ENDDO
151 ENDDO
152
153 ENDDO
154
155 C F <- [1 - d_yy^n *deltaT/tau].F
156 DO bj=myByLo(myThid),myByHi(myThid)
157 DO bi=myBxLo(myThid),myBxHi(myThid)
158 DO K=1,kSize
159 DO J=1,sNy
160 DO I=1,sNx
161 field(i,j,k,bi,bj)=field(i,j,k,bi,bj)
162 & -tmpFld(i,j,k,bi,bj)*deltaTtracer/Shap_Trtau
163 ENDDO
164 ENDDO
165 ENDDO
166 ENDDO
167 ENDDO
168
169 IF (kSize.EQ.Nr) THEN
170 _EXCH_XYZ_R8( field, myThid )
171 ELSEIF (kSize.EQ.1) THEN
172 _EXCH_XY_R8( field, myThid )
173 ELSE
174 STOP 'S/R SHAP_FILT_TRACER_S4: kSize is wrong'
175 ENDIF
176
177 ENDIF
178 #endif /* ALLOW_SHAP_FILT */
179
180 RETURN
181 END
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