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
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
|
!**********************************************************************
! Copyright 1998,1999,2000,2001,2002,2005,2007,2008,2009,2010 *
! Andreas Stohl, Petra Seibert, A. Frank, Gerhard Wotawa, *
! Caroline Forster, Sabine Eckhardt, John Burkhart, Harald Sodemann *
! *
! This file is part of FLEXPART. *
! *
! FLEXPART is free software: you can redistribute it and/or modify *
! it under the terms of the GNU General Public License as published by*
! the Free Software Foundation, either version 3 of the License, or *
! (at your option) any later version. *
! *
! FLEXPART is distributed in the hope that it will be useful, *
! but WITHOUT ANY WARRANTY; without even the implied warranty of *
! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
! GNU General Public License for more details. *
! *
! You should have received a copy of the GNU General Public License *
! along with FLEXPART. If not, see <http://www.gnu.org/licenses/>. *
!**********************************************************************
subroutine gridcheck_nests
!*****************************************************************************
! *
! This routine checks the grid specification for the nested model *
! domains. It is similar to subroutine gridcheck, which checks the *
! mother domain. *
! *
! Authors: A. Stohl, G. Wotawa *
! *
! 8 February 1999 *
! *
!*****************************************************************************
! CHANGE: 11/01/2008, Harald Sodemann, GRIB1/2 input with ECMWF grib_api *
! CHANGE: 03/12/2008, Harald Sodemann, change to f90 grib_api *
!*****************************************************************************
use grib_api
use par_mod
use com_mod
implicit none
!HSO parameters for grib_api
integer :: ifile
integer :: iret
integer :: igrib
integer :: gribVer,parCat,parNum,typSurf,valSurf,discipl
integer :: gotGrib
!HSO end
integer :: i,j,k,l,ifn,ifield,iumax,iwmax,numskip,nlev_ecn
integer :: nuvzn,nwzn
real :: akmn(nwzmax),bkmn(nwzmax),akzn(nuvzmax),bkzn(nuvzmax)
real(kind=4) :: xaux1,xaux2,yaux1,yaux2
real(kind=8) :: xaux1in,xaux2in,yaux1in,yaux2in
! VARIABLES AND ARRAYS NEEDED FOR GRIB DECODING
! dimension of isec2 at least (22+n), where n is the number of parallels or
! meridians in a quasi-regular (reduced) Gaussian or lat/long grid
! dimension of zsec2 at least (10+nn), where nn is the number of vertical
! coordinate parameters
integer :: isec1(56),isec2(22+nxmaxn+nymaxn)
real(kind=4) :: zsec2(60+2*nuvzmax),zsec4(jpunp)
!HSO grib api error messages
character(len=24) :: gribErrorMsg = 'Error reading grib file'
character(len=20) :: gribFunction = 'gridcheck_nests'
xresoln(0)=1. ! resolution enhancement for mother grid
yresoln(0)=1. ! resolution enhancement for mother grid
! Loop about all nesting levels
!******************************
do l=1,numbnests
iumax=0
iwmax=0
if(ideltas.gt.0) then
ifn=1
else
ifn=numbwf
endif
!
! OPENING OF DATA FILE (GRIB CODE)
!
ifile=0
igrib=0
iret=0
5 call grib_open_file(ifile,path(numpath+2*(l-1)+1) &
(1:length(numpath+2*(l-1)+1))//trim(wfnamen(l,ifn)),'r',iret)
if (iret.ne.GRIB_SUCCESS) then
goto 999 ! ERROR DETECTED
endif
!turn on support for multi fields messages
!call grib_multi_support_on
gotGrib=0
ifield=0
10 ifield=ifield+1
!
! GET NEXT FIELDS
!
call grib_new_from_file(ifile,igrib,iret)
if (iret.eq.GRIB_END_OF_FILE) then
goto 30 ! EOF DETECTED
elseif (iret.ne.GRIB_SUCCESS) then
goto 999 ! ERROR DETECTED
endif
!first see if we read GRIB1 or GRIB2
call grib_get_int(igrib,'editionNumber',gribVer,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
if (gribVer.eq.1) then ! GRIB Edition 1
!print*,'GRiB Edition 1'
!read the grib2 identifiers
call grib_get_int(igrib,'indicatorOfParameter',isec1(6),iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_int(igrib,'level',isec1(8),iret)
call grib_check(iret,gribFunction,gribErrorMsg)
!change code for etadot to code for omega
if (isec1(6).eq.77) then
isec1(6)=135
endif
!print*,isec1(6),isec1(8)
else
!print*,'GRiB Edition 2'
!read the grib2 identifiers
call grib_get_int(igrib,'discipline',discipl,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_int(igrib,'parameterCategory',parCat,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_int(igrib,'parameterNumber',parNum,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_int(igrib,'typeOfFirstFixedSurface',typSurf,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_int(igrib,'level',valSurf,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
!print*,discipl,parCat,parNum,typSurf,valSurf
!convert to grib1 identifiers
isec1(6)=-1
isec1(7)=-1
isec1(8)=-1
isec1(8)=valSurf ! level
if ((parCat.eq.0).and.(parNum.eq.0).and.(typSurf.eq.105)) then ! T
isec1(6)=130 ! indicatorOfParameter
elseif ((parCat.eq.2).and.(parNum.eq.2).and.(typSurf.eq.105)) then ! U
isec1(6)=131 ! indicatorOfParameter
elseif ((parCat.eq.2).and.(parNum.eq.3).and.(typSurf.eq.105)) then ! V
isec1(6)=132 ! indicatorOfParameter
elseif ((parCat.eq.1).and.(parNum.eq.0).and.(typSurf.eq.105)) then ! Q
isec1(6)=133 ! indicatorOfParameter
elseif ((parCat.eq.3).and.(parNum.eq.0).and.(typSurf.eq.1)) then !SP
isec1(6)=134 ! indicatorOfParameter
elseif ((parCat.eq.2).and.(parNum.eq.32)) then ! W, actually eta dot
isec1(6)=135 ! indicatorOfParameter
elseif ((parCat.eq.3).and.(parNum.eq.0).and.(typSurf.eq.101)) then !SLP
isec1(6)=151 ! indicatorOfParameter
elseif ((parCat.eq.2).and.(parNum.eq.2).and.(typSurf.eq.103)) then ! 10U
isec1(6)=165 ! indicatorOfParameter
elseif ((parCat.eq.2).and.(parNum.eq.3).and.(typSurf.eq.103)) then ! 10V
isec1(6)=166 ! indicatorOfParameter
elseif ((parCat.eq.0).and.(parNum.eq.0).and.(typSurf.eq.103)) then ! 2T
isec1(6)=167 ! indicatorOfParameter
elseif ((parCat.eq.0).and.(parNum.eq.6).and.(typSurf.eq.103)) then ! 2D
isec1(6)=168 ! indicatorOfParameter
elseif ((parCat.eq.1).and.(parNum.eq.11).and.(typSurf.eq.1)) then ! SD
isec1(6)=141 ! indicatorOfParameter
elseif ((parCat.eq.6).and.(parNum.eq.1)) then ! CC
isec1(6)=164 ! indicatorOfParameter
elseif ((parCat.eq.1).and.(parNum.eq.9)) then ! LSP
isec1(6)=142 ! indicatorOfParameter
elseif ((parCat.eq.1).and.(parNum.eq.10)) then ! CP
isec1(6)=143 ! indicatorOfParameter
elseif ((parCat.eq.0).and.(parNum.eq.11).and.(typSurf.eq.1)) then ! SHF
isec1(6)=146 ! indicatorOfParameter
elseif ((parCat.eq.4).and.(parNum.eq.9).and.(typSurf.eq.1)) then ! SR
isec1(6)=176 ! indicatorOfParameter
elseif ((parCat.eq.2).and.(parNum.eq.17)) then ! EWSS
isec1(6)=180 ! indicatorOfParameter
elseif ((parCat.eq.2).and.(parNum.eq.18)) then ! NSSS
isec1(6)=181 ! indicatorOfParameter
elseif ((parCat.eq.3).and.(parNum.eq.4)) then ! ORO
isec1(6)=129 ! indicatorOfParameter
elseif ((parCat.eq.3).and.(parNum.eq.7)) then ! SDO
isec1(6)=160 ! indicatorOfParameter
elseif ((discipl.eq.2).and.(parCat.eq.0).and.(parNum.eq.0).and. &
(typSurf.eq.1)) then ! LSM
isec1(6)=172 ! indicatorOfParameter
else
print*,'***ERROR: undefined GRiB2 message found!',discipl, &
parCat,parNum,typSurf
endif
endif
!get the size and data of the values array
if (isec1(6).ne.-1) then
call grib_get_real4_array(igrib,'values',zsec4,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
endif
!HSO get the required fields from section 2 in a gribex compatible manner
if (ifield.eq.1) then
call grib_get_int(igrib,'numberOfPointsAlongAParallel', &
isec2(2),iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_int(igrib,'numberOfPointsAlongAMeridian', &
isec2(3),iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_int(igrib,'numberOfVerticalCoordinateValues', &
isec2(12),iret)
call grib_check(iret,gribFunction,gribErrorMsg)
!HSO get the size and data of the vertical coordinate array
call grib_get_real4_array(igrib,'pv',zsec2,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
nxn(l)=isec2(2)
nyn(l)=isec2(3)
nlev_ecn=isec2(12)/2-1
endif ! ifield
!HSO get the second part of the grid dimensions only from GRiB1 messages
if ((gribVer.eq.1).and.(gotGrib.eq.0)) then
call grib_get_real8(igrib,'longitudeOfFirstGridPointInDegrees', &
xaux1in,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_real8(igrib,'longitudeOfLastGridPointInDegrees', &
xaux2in,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_real8(igrib,'latitudeOfLastGridPointInDegrees', &
yaux1in,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_real8(igrib,'latitudeOfFirstGridPointInDegrees', &
yaux2in,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
xaux1=xaux1in
xaux2=xaux2in
yaux1=yaux1in
yaux2=yaux2in
if(xaux1.gt.180) xaux1=xaux1-360.0
if(xaux2.gt.180) xaux2=xaux2-360.0
if(xaux1.lt.-180) xaux1=xaux1+360.0
if(xaux2.lt.-180) xaux2=xaux2+360.0
if (xaux2.lt.xaux1) xaux2=xaux2+360.
xlon0n(l)=xaux1
ylat0n(l)=yaux1
dxn(l)=(xaux2-xaux1)/real(nxn(l)-1)
dyn(l)=(yaux2-yaux1)/real(nyn(l)-1)
gotGrib=1
endif ! ifield.eq.1
k=isec1(8)
if(isec1(6).eq.131) iumax=max(iumax,nlev_ec-k+1)
if(isec1(6).eq.135) iwmax=max(iwmax,nlev_ec-k+1)
if(isec1(6).eq.129) then
do j=0,nyn(l)-1
do i=0,nxn(l)-1
oron(i,j,l)=zsec4(nxn(l)*(nyn(l)-j-1)+i+1)/ga
end do
end do
endif
if(isec1(6).eq.172) then
do j=0,nyn(l)-1
do i=0,nxn(l)-1
lsmn(i,j,l)=zsec4(nxn(l)*(nyn(l)-j-1)+i+1)/ga
end do
end do
endif
if(isec1(6).eq.160) then
do j=0,nyn(l)-1
do i=0,nxn(l)-1
excessoron(i,j,l)=zsec4(nxn(l)*(nyn(l)-j-1)+i+1)/ga
end do
end do
endif
call grib_release(igrib)
goto 10 !! READ NEXT LEVEL OR PARAMETER
!
! CLOSING OF INPUT DATA FILE
!
30 call grib_close_file(ifile)
!error message if no fields found with correct first longitude in it
if (gotGrib.eq.0) then
print*,'***ERROR: input file needs to contain GRiB1 formatted'// &
'messages'
stop
endif
nuvzn=iumax
nwzn=iwmax
if(nuvzn.eq.nlev_ec) nwzn=nlev_ecn+1
if (nxn(l).gt.nxmaxn) then
write(*,*) 'FLEXPART error: Too many grid points in x direction.'
write(*,*) 'Reduce resolution of wind fields (file GRIDSPEC)'
write(*,*) 'for nesting level ',l
write(*,*) 'Or change parameter settings in file par_mod.'
write(*,*) nxn(l),nxmaxn
stop
endif
if (nyn(l).gt.nymaxn) then
write(*,*) 'FLEXPART error: Too many grid points in y direction.'
write(*,*) 'Reduce resolution of wind fields (file GRIDSPEC)'
write(*,*) 'for nesting level ',l
write(*,*) 'Or change parameter settings in file par_mod.'
write(*,*) nyn(l),nymaxn
stop
endif
if ((nuvzn.gt.nuvzmax).or.(nwzn.gt.nwzmax)) then
write(*,*) 'FLEXPART error: Nested wind fields have too many'// &
'vertical levels.'
write(*,*) 'Problem was encountered for nesting level ',l
stop
endif
! Output of grid info
!********************
write(*,'(a,i2)') 'Nested domain #: ',l
write(*,'(a,f10.2,a1,f10.2,a,f10.2)') ' Longitude range: ', &
xlon0n(l),' to ',xlon0n(l)+(nxn(l)-1)*dxn(l), &
' Grid distance: ',dxn(l)
write(*,'(a,f10.2,a1,f10.2,a,f10.2)') ' Latitude range: ', &
ylat0n(l),' to ',ylat0n(l)+(nyn(l)-1)*dyn(l), &
' Grid distance: ',dyn(l)
write(*,*)
! Determine, how much the resolutions in the nests are enhanced as
! compared to the mother grid
!*****************************************************************
xresoln(l)=dx/dxn(l)
yresoln(l)=dy/dyn(l)
! Determine the mother grid coordinates of the corner points of the
! nested grids
! Convert first to geographical coordinates, then to grid coordinates
!********************************************************************
xaux1=xlon0n(l)
xaux2=xlon0n(l)+real(nxn(l)-1)*dxn(l)
yaux1=ylat0n(l)
yaux2=ylat0n(l)+real(nyn(l)-1)*dyn(l)
xln(l)=(xaux1-xlon0)/dx
xrn(l)=(xaux2-xlon0)/dx
yln(l)=(yaux1-ylat0)/dy
yrn(l)=(yaux2-ylat0)/dy
if ((xln(l).lt.0.).or.(yln(l).lt.0.).or. &
(xrn(l).gt.real(nxmin1)).or.(yrn(l).gt.real(nymin1))) then
write(*,*) 'Nested domain does not fit into mother domain'
write(*,*) 'For global mother domain fields, you can shift'
write(*,*) 'shift the mother domain into x-direction'
write(*,*) 'by setting nxshift (file par_mod) to a'
write(*,*) 'positive value. Execution is terminated.'
stop
endif
! CALCULATE VERTICAL DISCRETIZATION OF ECMWF MODEL
! PARAMETER akm,bkm DESCRIBE THE HYBRID "ETA" COORDINATE SYSTEM
numskip=nlev_ecn-nuvzn ! number of ecmwf model layers not used by FLEXPART
do i=1,nwzn
j=numskip+i
k=nlev_ecn+1+numskip+i
akmn(nwzn-i+1)=zsec2(j)
bkmn(nwzn-i+1)=zsec2(k)
end do
!
! CALCULATION OF AKZ, BKZ
! AKZ,BKZ: model discretization parameters at the center of each model
! layer
!
! Assign the 10 m winds to an artificial model level with akz=0 and bkz=1.0,
! i.e. ground level
!*****************************************************************************
akzn(1)=0.
bkzn(1)=1.0
do i=1,nuvzn
akzn(i+1)=0.5*(akmn(i+1)+akmn(i))
bkzn(i+1)=0.5*(bkmn(i+1)+bkmn(i))
end do
nuvzn=nuvzn+1
! Check, whether the heights of the model levels of the nested
! wind fields are consistent with those of the mother domain.
! If not, terminate model run.
!*************************************************************
do i=1,nuvz
if ((akzn(i).ne.akz(i)).or.(bkzn(i).ne.bkz(i))) then
write(*,*) 'FLEXPART error: The wind fields of nesting level',l
write(*,*) 'are not consistent with the mother domain:'
write(*,*) 'Differences in vertical levels detected.'
stop
endif
end do
do i=1,nwz
if ((akmn(i).ne.akm(i)).or.(bkmn(i).ne.bkm(i))) then
write(*,*) 'FLEXPART error: The wind fields of nesting level',l
write(*,*) 'are not consistent with the mother domain:'
write(*,*) 'Differences in vertical levels detected.'
stop
endif
end do
end do
return
999 write(*,*)
write(*,*) ' ###########################################'// &
'###### '
write(*,*) ' FLEXPART SUBROUTINE GRIDCHECK:'
write(*,*) ' CAN NOT OPEN INPUT DATA FILE '//wfnamen(l,ifn)
write(*,*) ' FOR NESTING LEVEL ',k
write(*,*) ' ###########################################'// &
'###### '
stop
end subroutine gridcheck_nests
|
