/[MITgcm]/MITgcm/pkg/exf/exf_set_gen.F
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Contents of /MITgcm/pkg/exf/exf_set_gen.F

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Revision 1.6 - (show annotations) (download)
Tue Sep 23 04:34:25 2003 UTC (20 years, 8 months ago) by dimitri
Branch: MAIN
CVS Tags: checkpoint51j_post, checkpoint51f_post, branchpoint-genmake2, checkpoint51h_pre, checkpoint51g_post, checkpoint51i_pre
Branch point for: branch-genmake2
Changes since 1.5: +1 -0 lines
o Mods and bug fixes to pkg/cal and pkg/exf needed for computation
  of tracer Green's fucntions for ocean inversion project.

1 #include "EXF_CPPOPTIONS.h"
2
3 subroutine exf_set_gen(
4 & genfile, genstartdate, genperiod, exf_inscal_gen,
5 & genfld, gen0, gen1, genmask,
6 #ifdef USE_EXF_INTERPOLATION
7 & gen_lon0, gen_lon_inc, gen_lat0, gen_lat_inc,
8 & gen_nlon, gen_nlat, gen_xout, gen_yout,
9 #endif
10 & mycurrenttime, mycurrentiter, mythid )
11
12 c ==================================================================
13 c SUBROUTINE exf_set_gen
14 c ==================================================================
15 c
16 c o set external forcing gen
17 c
18 c started: Ralf.Giering@FastOpt.de 25-Mai-2000
19 c changed: heimbach@mit.edu 10-Jan-2002
20 c 20-Dec-2002: mods for pkg/seaice, menemenlis@jpl.nasa.gov
21 c heimbach@mit.edu: totally re-organized exf_set_...
22 c replaced all routines by one generic routine
23 c 5-Aug-2003: added USE_EXF_INTERPOLATION for arbitrary
24 c input grid capability
25
26 c ==================================================================
27 c SUBROUTINE exf_set_gen
28 c ==================================================================
29
30 implicit none
31
32 c == global variables ==
33
34 #include "EEPARAMS.h"
35 #include "SIZE.h"
36 #include "GRID.h"
37
38 #include "exf_param.h"
39 #include "exf_constants.h"
40
41 c == routine arguments ==
42
43 integer genstartdate(4)
44 _RL genperiod
45 _RL exf_inscal_gen
46 _RL genfld(1-olx:snx+olx,1-oly:sny+oly,nsx,nsy)
47 _RL gen0 (1-olx:snx+olx,1-oly:sny+oly,nsx,nsy)
48 _RL gen1 (1-olx:snx+olx,1-oly:sny+oly,nsx,nsy)
49 character*1 genmask
50 character*(128) genfile
51 _RL mycurrenttime
52 integer mycurrentiter
53 integer mythid
54 #ifdef USE_EXF_INTERPOLATION
55 c gen_lon_0 ,gen_lat_0 :: longitude and latitude of SouthWest
56 c corner of global input grid
57 c gen_nlon, gen_nlat :: input x-grid and y-grid size
58 c gen_lon_inc :: scalar x-grid increment
59 c gen_lat_inc :: vector y-grid increments
60 c gen_xout, gen_yout :: coordinates for output grid
61 _RL gen_lon0, gen_lon_inc
62 _RL gen_lat0, gen_lat_inc(MAX_LAT_INC)
63 INTEGER gen_nlon, gen_nlat
64 _RS gen_xout (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
65 _RS gen_yout (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
66 #endif
67
68 c == local variables ==
69
70 logical first, changed
71 integer count0, count1
72 _RL fac
73
74 integer bi, bj
75 integer i, j, interp_method
76
77 c == end of interface ==
78
79 if ( genfile .NE. ' ' ) then
80
81 c get record numbers and interpolation factor for gen
82 call exf_GetFFieldRec(
83 I genstartdate, genperiod
84 O , fac, first, changed
85 O , count0, count1
86 I , mycurrenttime, mycurrentiter, mythid
87 & )
88
89 if ( first ) then
90 #ifdef USE_EXF_INTERPOLATION
91 interp_method = 2
92 call exf_interp( genfile, exf_iprec
93 & , gen1, count0, gen_xout, gen_yout
94 & , gen_lon0,gen_lon_inc
95 & , gen_lat0,gen_lat_inc
96 & , gen_nlon,gen_nlat,interp_method,mythid
97 & )
98 #else
99 call mdsreadfield( genfile, exf_iprec, exf_yftype, 1
100 & , gen1, count0, mythid
101 & )
102 #endif
103
104 if (exf_yftype .eq. 'RL') then
105 call exf_filter_rl( gen1, genmask, mythid )
106 else
107 call exf_filter_rs( gen1, genmask, mythid )
108 end if
109 endif
110
111 if (( first ) .or. ( changed )) then
112 call exf_SwapFFields( gen0, gen1, mythid )
113
114 #ifdef USE_EXF_INTERPOLATION
115 interp_method = 2
116 call exf_interp( genfile, exf_iprec
117 & , gen1, count1, gen_xout, gen_yout
118 & , gen_lon0,gen_lon_inc
119 & , gen_lat0,gen_lat_inc
120 & , gen_nlon,gen_nlat,interp_method,mythid
121 & )
122 #else
123 call mdsreadfield( genfile, exf_iprec, exf_yftype, 1
124 & , gen1, count1, mythid
125 & )
126 #endif
127
128 if (exf_yftype .eq. 'RL') then
129 call exf_filter_rl( gen1, genmask, mythid )
130 else
131 call exf_filter_rs( gen1, genmask, mythid )
132 end if
133 endif
134
135 c Loop over tiles.
136 do bj = mybylo(mythid),mybyhi(mythid)
137 do bi = mybxlo(mythid),mybxhi(mythid)
138 do j = 1,sny
139 do i = 1,snx
140
141 c Interpolate linearly onto the current time.
142
143 genfld(i,j,bi,bj) = exf_inscal_gen * (
144 & fac * gen0(i,j,bi,bj) +
145 & (exf_one - fac) * gen1(i,j,bi,bj) )
146
147 enddo
148 enddo
149 enddo
150 enddo
151
152 endif
153
154 end
155
156
157
158 subroutine exf_init_gen (
159 & genconst, genfld, gen0, gen1, mythid )
160
161 c ==================================================================
162 c SUBROUTINE exf_init_gen
163 c ==================================================================
164 c
165 c o
166 c
167 c started: Ralf.Giering@FastOpt.de 25-Mai-2000
168 c changed: heimbach@mit.edu 10-Jan-2002
169 c heimbach@mit.edu: totally re-organized exf_set_...
170 c replaced all routines by one generic routine
171 c
172 c ==================================================================
173 c SUBROUTINE exf_init_gen
174 c ==================================================================
175
176 implicit none
177
178 c == global variables ==
179
180 #include "EEPARAMS.h"
181 #include "SIZE.h"
182
183 #include "exf_param.h"
184
185 c == routine arguments ==
186
187 _RL genconst
188 _RL genfld(1-olx:snx+olx,1-oly:sny+oly,nsx,nsy)
189 _RL gen0 (1-olx:snx+olx,1-oly:sny+oly,nsx,nsy)
190 _RL gen1 (1-olx:snx+olx,1-oly:sny+oly,nsx,nsy)
191 integer mythid
192
193 c == local variables ==
194
195 integer bi, bj
196 integer i, j
197
198 c == end of interface ==
199
200 do bj = mybylo(mythid), mybyhi(mythid)
201 do bi = mybxlo(mythid), mybxhi(mythid)
202 do j = 1, sny
203 do i = 1, snx
204 genfld(i,j,bi,bj) = genconst
205 gen0(i,j,bi,bj) = 0. _d 0
206 gen1(i,j,bi,bj) = 0. _d 0
207 enddo
208 enddo
209 enddo
210 enddo
211
212 end

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