1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
|
C Copyright 1981-2007 ECMWF
C
C Licensed under the GNU Lesser General Public License which
C incorporates the terms and conditions of version 3 of the GNU
C General Public License.
C See LICENSE and gpl-3.0.txt for details.
C
INTEGER FUNCTION INTUVF( KVGRIB, KDGRIB, INLEN,
X KUGRIBO, KVGRIBO, OUTLEN)
C
C---->
C**** INTUVF
C
C Purpose
C -------
C
C Interpolate input vorticity and divergence field to
C U and V fields.
C
C
C Interface
C ---------
C
C IRET = INTUVF( KVGRIB, KDGRIB, INLEN, KUGRIBO,KVGRIBO,OUTLEN)
C
C Input
C -----
C
C KVGRIB - Input vorticity field (spectral, GRIB format).
C KDGRIB - Input divergence field (spectral, GRIB format).
C INLEN - Input field length (words).
C
C
C Output
C ------
C
C KUGRIBO - Output U field (GRIB format).
C KVGRIBO - Output V field (GRIB format).
C OUTLEN - Output field length (words).
C
C
C Method
C ------
C
C Convert spectral vorticity/divergence to spectral U/V and then
C interpolate U and V to output fields.
C
C
C Externals
C ---------
C
C IBASINI - Ensure basic interpolation setup is done.
C JVOD2UV - Converts spectral vorticity/divergence to spectral U/V.
C JMEMHAN - Allocate/deallocate scratch memory.
C INTFAU - Prepare to interpolate unpacked input field.
C INTFBU - Interpolate unpacked input field.
C INTLOG - Log error message.
C RESET_C - Reset interpolation handling options using GRIB product.
C INSANE - Ensure no outrageous values given for interpolation.
C
C
C Author
C ------
C
C J.D.Chambers ECMWF Jan 1995
C
C J.D.Chambers ECMWF Feb 1997
C Allow for 64-bit pointers
C
C----<
C -----------------------------------------------------------------|
C
IMPLICIT NONE
C
C Function arguments
C
INTEGER KVGRIB(*), KDGRIB(*), INLEN
INTEGER KUGRIBO(*), KVGRIBO(*), OUTLEN
C
#include "parim.h"
#include "nifld.common"
#include "nofld.common"
#include "grfixed.h"
#include "intf.h"
C
C Parameters
C
INTEGER JPROUTINE, JPALLOC, JPDEALL, JPSCR3, JPSCR4
PARAMETER (JPROUTINE = 26800 )
PARAMETER (JPALLOC = 1)
PARAMETER (JPDEALL = 0)
PARAMETER (JPSCR3 = 3)
PARAMETER (JPSCR4 = 4)
C
C Local variables
C
INTEGER IERR, KPR, ISZVD, ISZUV, IWORD, ISAME
INTEGER IPVORT, IPDIV, IP_U, IP_V
#ifdef POINTER_64
INTEGER*8 IUV
INTEGER*8 IVD
#endif
REAL UV, VD
POINTER ( IUV, UV )
POINTER ( IVD, VD )
DIMENSION UV( 1 ), VD( 1 )
C
C Externals
C
INTEGER INTFAU, INTFBU, RESET_C
INTEGER IBASINI, INSANE
C
C -----------------------------------------------------------------|
C* Section 1. Initialise
C -----------------------------------------------------------------|
C
100 CONTINUE
INTUVF = 0
IERR = 0
KPR = 0
C
C Ensure that basic initialisation has been done
C
IERR = IBASINI(0)
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTUVF: basic initialise failed',JPQUIET)
INTUVF = IERR
GOTO 900
ENDIF
C
C -----------------------------------------------------------------|
C* Section 2. Unpack the vorticity/divergence fields.
C -----------------------------------------------------------------|
C
200 CONTINUE
C
C Get scratch memory for vorticity/divergence unpacked fields.
C Vorticity/divergence memory areas are adjacent.
C
C Need to establish input truncation, so unpack GRIB sections 1
C and 2.
C
IERR = 1
CALL GRIBEX(ISEC0, ISEC1, ISEC2, ZSEC2, ISEC3, ZSEC3, ISEC4,
X VD(IPVORT), ISZVD, KVGRIB, INLEN, IWORD, 'I',IERR)
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTUVF: GRIBEX decoding failed.',IERR)
INTUVF = IERR
GOTO 900
ENDIF
C
NIRESO = ISEC2(2)
ISZVD = (NIRESO+1)*(NIRESO+2)
IPVORT = 1
IPDIV = 1 + ISZVD
CALL JMEMHAN( JPSCR4, IVD, ISZVD*2, JPALLOC, IERR)
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTUVF: Memory allocation fail.',JPQUIET)
INTUVF = IERR
GOTO 900
ENDIF
C
C Decode data from GRIB code (no checking)
C Vorticity ...
C
IWORD = INLEN
IERR = 0
CALL GRSVCK(0)
IERR = 1
ISEC3(2) = NINT(RMISSGV)
ZSEC3(2) = RMISSGV
CALL GRIBEX(ISEC0, ISEC1, ISEC2, ZSEC2, ISEC3, ZSEC3, ISEC4,
X VD(IPVORT), ISZVD, KVGRIB, INLEN, IWORD, 'D',IERR)
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTUVF: GRIBEX decoding failed.',IERR)
INTUVF = IERR
GOTO 900
ENDIF
C
C Divergence ...
C
IERR = 1
ISEC3(2) = NINT(RMISSGV)
ZSEC3(2) = RMISSGV
CALL GRIBEX(ISEC0, ISEC1, ISEC2, ZSEC2, ISEC3, ZSEC3, ISEC4,
X VD(IPDIV), ISZVD, KDGRIB, INLEN, IWORD, 'D',IERR)
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTUVF: GRIBEX decoding failed.',IERR)
INTUVF = IERR
GOTO 900
ENDIF
C
C Setup interpolation options from input GRIB characteristics.
C
IERR = RESET_C( ISEC1, ISEC2, ZSEC2, ISEC4)
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_ERROR,
X 'INTUVF: Setup interp. options from GRIB failed.',JPQUIET)
INTUVF = IERR
GOTO 900
ENDIF
C
C Check that no outrageous values given for interpolation
C
ISAME = INSANE()
IF( ISAME.GT.0 ) THEN
CALL INTLOG(JP_ERROR,
X 'INTUVF: Interpolation cannot use given values.',JPQUIET)
INTUVF = ISAME
GOTO 900
ENDIF
C
C -----------------------------------------------------------------|
C* Section 3. Convert spectral vorticity/divergence
C to spectral U/V
C -----------------------------------------------------------------|
C
300 CONTINUE
C
C Get scratch memory for U and V spectral fields.
C U and V memory areas are adjacent.
C
ISZUV = (NIRESO+1)*(NIRESO+4)
IP_U = 1
IP_V = 1 + ISZUV
CALL JMEMHAN( JPSCR3, IUV, ISZUV*2, JPALLOC, IERR)
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTUVF: Memory allocation fail.',JPQUIET)
INTUVF = IERR
GOTO 900
ENDIF
C
C Generate U and V with same truncation as input fields.
C
CALL JVOD2UV( VD(IPVORT), VD(IPDIV), NIRESO,
X UV(IP_U), UV(IP_V), NIRESO)
C
C -----------------------------------------------------------------|
C* Section 4. Interpolate U field.
C -----------------------------------------------------------------|
C
400 CONTINUE
C
C Prepare to interpolate U field.
C
NIFORM = 0
IERR = INTFAU( UV(IP_U), ISZUV, KUGRIBO, OUTLEN)
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_ERROR,
X 'INTUVF: Prepare to interpolate failed.',IERR)
INTUVF = IERR
GOTO 900
ENDIF
C
C Interpolate U field.
C
IERR = INTFBU( UV(IP_U), ISZUV, KUGRIBO, OUTLEN)
C
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTUVF: Interpolation failed.',JPQUIET)
INTUVF = IERR
GOTO 900
ENDIF
C
C -----------------------------------------------------------------|
C* Section 5. Interpolate V field.
C -----------------------------------------------------------------|
C
500 CONTINUE
C
C Prepare to interpolate V field.
C
IERR = INTFAU( UV(IP_V), ISZUV, KVGRIBO, OUTLEN)
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_ERROR,
X 'INTUVF: Prepare to interpolate failed.',JPQUIET)
INTUVF = IERR
GOTO 900
ENDIF
C
C Interpolate V field.
C
IERR = INTFBU( UV(IP_V), ISZUV, KVGRIBO, OUTLEN)
C
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_ERROR,
X 'INTUVF: Prepare to interpolate failed.',JPQUIET)
INTUVF = IERR
GOTO 900
ENDIF
C
C -----------------------------------------------------------------|
C* Section 9. Closedown.
C -----------------------------------------------------------------|
C
900 CONTINUE
C
C Clear change flags for next product processing
C
LCHANGE = .FALSE.
LSMCHNG = .FALSE.
C
C Return the scratch memory.
C
CALL JMEMHAN( JPSCR3, IUV, ISZUV*2, JPDEALL, IERR)
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTUVF: Memory deallocation fail',JPQUIET)
INTUVF = IERR
ENDIF
C
CALL JMEMHAN( JPSCR4, IVD, ISZVD*2, JPDEALL, IERR)
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTUVF: Memory deallocation fail',JPQUIET)
INTUVF = IERR
ENDIF
C
RETURN
END
|
