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io_grib_share.F

Last change on this file was 11, checked in by aslmd, 14 years ago
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1	!
2	! Todd Hutchinson
3	! WSI
4	! August 17, 2005
5	!
6	! Routines in this file are shared by io_grib1 and io_grib2
7	!
8
9	!*****************************************************************************
10
11	SUBROUTINE get_dims(MemoryOrder, Start, End, ndim, x_start, x_end, y_start, &
12	y_end, z_start, z_end)
13	IMPLICIT NONE
14	CHARACTER (LEN=*) ,INTENT(IN) :: MemoryOrder
15	INTEGER ,INTENT(OUT) :: ndim,x_start,x_end,y_start
16	INTEGER ,INTENT(OUT) :: y_end,z_start,z_end
17	integer ,dimension(*),intent(in) :: Start, End
18	CHARACTER (LEN=1) :: char
19	INTEGER :: idx
20	CHARACTER (LEN=3) :: MemoryOrderLcl
21
22	x_start = 1
23	x_end = 1
24	y_start = 1
25	y_end = 1
26	z_start = 1
27	z_end = 1
28
29	!
30	! Note: Need to add "char == 'S'" for boundary conditions
31	!
32
33	ndim = 0
34
35	! Fix for out-of-bounds references
36	MemoryOrderLcl = ' '
37	do idx=1,len_trim(MemoryOrder)
38	MemoryOrderLcl(idx:idx) = MemoryOrder(idx:idx)
39	enddo
40	!
41	! First, do the special boundary cases. These do not seem to
42	!
43	if ((MemoryOrderLcl(1:3) .eq. 'XSZ') &
44	.or. (MemoryOrderLcl(1:3) .eq. 'XEZ')) then
45	x_start = Start(3)
46	x_end = End(3)
47	y_start = Start(1)
48	y_end = End(1)
49	z_start = Start(2)
50	z_end = End(2)
51	ndim = 3
52	else if ((MemoryOrderLcl(1:3) .eq. 'YSZ') .or. &
53	(MemoryOrderLcl(1:3) .eq. 'YEZ')) then
54	x_start = Start(1)
55	x_end = End(1)
56	y_start = Start(3)
57	y_end = End(3)
58	z_start = Start(2)
59	z_end = End(2)
60	ndim = 3
61	else if ((MemoryOrderLcl(1:2) .eq. 'YS') .or. &
62	(MemoryOrderLcl(1:2) .eq. 'YE')) then
63	x_start = Start(1)
64	x_end = End(1)
65	y_start = Start(2)
66	y_end = End(2)
67	ndim = 2
68	else if ((MemoryOrderLcl(1:2) .eq. 'XS') .or. &
69	(MemoryOrderLcl(1:2) .eq. 'XE')) then
70	x_start = Start(2)
71	x_end = End(2)
72	y_start = Start(1)
73	y_end = End(1)
74	ndim = 2
75	else if ((MemoryOrderLcl(1:1) .eq. 'C') .or. (MemoryOrderLcl(1:1) .eq. 'c')) then
76	! This is for "non-decomposed" fields
77	x_start = Start(1)
78	x_end = End(1)
79	! y_start = Start(2)
80	! y_end = End(2)
81	! z_start = Start(3)
82	! z_end = End(3)
83	ndim = 3
84	else
85	do idx=1,len_trim(MemoryOrderLcl)
86	char = MemoryOrderLcl(idx:idx)
87	if ((char == 'X') .or. (char == 'x')) then
88	x_start = Start(idx)
89	x_end = End(idx)
90	ndim = ndim + 1
91	else if ((char == 'Y') .or. (char == 'y')) then
92	y_start = Start(idx)
93	y_end = End(idx)
94	ndim = ndim + 1
95	else if ((char == 'Z') .or. (char == 'z')) then
96	z_start = Start(idx)
97	z_end = End(idx)
98	ndim = ndim + 1
99	else if (char == '0') then
100	! Do nothing, this indicates field is a scalar.
101	ndim = 0
102	else
103	call wrf_message('Invalid Dimension in get_dims: '//char)
104	endif
105	enddo
106	endif
107
108	END SUBROUTINE get_dims
109
110	!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
111
112	SUBROUTINE geth_idts (ndate, odate, idts)
113
114	IMPLICIT NONE
115
116	! From 2 input mdates ('YYYY-MM-DD HH:MM:SS.ffff'),
117	! compute the time difference.
118
119	! on entry - ndate - the new hdate.
120	! odate - the old hdate.
121
122	! on exit - idts - the change in time in seconds.
123
124	CHARACTER (LEN=*) , INTENT(INOUT) :: ndate, odate
125	REAL , INTENT(OUT) :: idts
126
127	! Local Variables
128
129	! yrnew - indicates the year associated with "ndate"
130	! yrold - indicates the year associated with "odate"
131	! monew - indicates the month associated with "ndate"
132	! moold - indicates the month associated with "odate"
133	! dynew - indicates the day associated with "ndate"
134	! dyold - indicates the day associated with "odate"
135	! hrnew - indicates the hour associated with "ndate"
136	! hrold - indicates the hour associated with "odate"
137	! minew - indicates the minute associated with "ndate"
138	! miold - indicates the minute associated with "odate"
139	! scnew - indicates the second associated with "ndate"
140	! scold - indicates the second associated with "odate"
141	! i - loop counter
142	! mday - a list assigning the number of days in each month
143
144	CHARACTER (LEN=24) :: tdate
145	INTEGER :: olen, nlen
146	INTEGER :: yrnew, monew, dynew, hrnew, minew, scnew
147	INTEGER :: yrold, moold, dyold, hrold, miold, scold
148	INTEGER :: mday(12), i, newdys, olddys
149	LOGICAL :: npass, opass
150	INTEGER :: isign
151	CHARACTER (LEN=300) :: wrf_err_message
152	INTEGER :: ndfeb
153
154	IF (odate.GT.ndate) THEN
155	isign = -1
156	tdate=ndate
157	ndate=odate
158	odate=tdate
159	ELSE
160	isign = 1
161	END IF
162
163	! Assign the number of days in a months
164
165	mday( 1) = 31
166	mday( 2) = 28
167	mday( 3) = 31
168	mday( 4) = 30
169	mday( 5) = 31
170	mday( 6) = 30
171	mday( 7) = 31
172	mday( 8) = 31
173	mday( 9) = 30
174	mday(10) = 31
175	mday(11) = 30
176	mday(12) = 31
177
178	! Break down old hdate into parts
179
180	hrold = 0
181	miold = 0
182	scold = 0
183	olen = LEN(odate)
184
185	READ(odate(1:4), '(I4)') yrold
186	READ(odate(6:7), '(I2)') moold
187	READ(odate(9:10), '(I2)') dyold
188	IF (olen.GE.13) THEN
189	READ(odate(12:13),'(I2)') hrold
190	IF (olen.GE.16) THEN
191	READ(odate(15:16),'(I2)') miold
192	IF (olen.GE.19) THEN
193	READ(odate(18:19),'(I2)') scold
194	END IF
195	END IF
196	END IF
197
198	! Break down new hdate into parts
199
200	hrnew = 0
201	minew = 0
202	scnew = 0
203	nlen = LEN(ndate)
204
205	READ(ndate(1:4), '(I4)') yrnew
206	READ(ndate(6:7), '(I2)') monew
207	READ(ndate(9:10), '(I2)') dynew
208	IF (nlen.GE.13) THEN
209	READ(ndate(12:13),'(I2)') hrnew
210	IF (nlen.GE.16) THEN
211	READ(ndate(15:16),'(I2)') minew
212	IF (nlen.GE.19) THEN
213	READ(ndate(18:19),'(I2)') scnew
214	END IF
215	END IF
216	END IF
217
218	! Check that the dates make sense.
219
220	npass = .true.
221	opass = .true.
222
223	! Check that the month of NDATE makes sense.
224
225	IF ((monew.GT.12).or.(monew.LT.1)) THEN
226	PRINT*, 'GETH_IDTS: Month of NDATE = ', monew
227	npass = .false.
228	END IF
229
230	! Check that the month of ODATE makes sense.
231
232	IF ((moold.GT.12).or.(moold.LT.1)) THEN
233	PRINT*, 'GETH_IDTS: Month of ODATE = ', moold
234	opass = .false.
235	END IF
236
237	! Check that the day of NDATE makes sense.
238
239	IF (monew.ne.2) THEN
240	! ...... For all months but February
241	IF ((dynew.GT.mday(monew)).or.(dynew.LT.1)) THEN
242	PRINT*, 'GETH_IDTS: Day of NDATE = ', dynew
243	npass = .false.
244	END IF
245	ELSE IF (monew.eq.2) THEN
246	! ...... For February
247	IF ((dynew.GT.ndfeb(yrnew)).OR.(dynew.LT.1)) THEN
248	PRINT*, 'GETH_IDTS: Day of NDATE = ', dynew
249	npass = .false.
250	END IF
251	END IF
252
253	! Check that the day of ODATE makes sense.
254
255	IF (moold.ne.2) THEN
256	! ...... For all months but February
257	IF ((dyold.GT.mday(moold)).or.(dyold.LT.1)) THEN
258	PRINT*, 'GETH_IDTS: Day of ODATE = ', dyold
259	opass = .false.
260	END IF
261	ELSE IF (moold.eq.2) THEN
262	! ....... For February
263	IF ((dyold.GT.ndfeb(yrold)).or.(dyold.LT.1)) THEN
264	PRINT*, 'GETH_IDTS: Day of ODATE = ', dyold
265	opass = .false.
266	END IF
267	END IF
268
269	! Check that the hour of NDATE makes sense.
270
271	IF ((hrnew.GT.23).or.(hrnew.LT.0)) THEN
272	PRINT*, 'GETH_IDTS: Hour of NDATE = ', hrnew
273	npass = .false.
274	END IF
275
276	! Check that the hour of ODATE makes sense.
277
278	IF ((hrold.GT.23).or.(hrold.LT.0)) THEN
279	PRINT*, 'GETH_IDTS: Hour of ODATE = ', hrold
280	opass = .false.
281	END IF
282
283	! Check that the minute of NDATE makes sense.
284
285	IF ((minew.GT.59).or.(minew.LT.0)) THEN
286	PRINT*, 'GETH_IDTS: Minute of NDATE = ', minew
287	npass = .false.
288	END IF
289
290	! Check that the minute of ODATE makes sense.
291
292	IF ((miold.GT.59).or.(miold.LT.0)) THEN
293	PRINT*, 'GETH_IDTS: Minute of ODATE = ', miold
294	opass = .false.
295	END IF
296
297	! Check that the second of NDATE makes sense.
298
299	IF ((scnew.GT.59).or.(scnew.LT.0)) THEN
300	PRINT*, 'GETH_IDTS: SECOND of NDATE = ', scnew
301	npass = .false.
302	END IF
303
304	! Check that the second of ODATE makes sense.
305
306	IF ((scold.GT.59).or.(scold.LT.0)) THEN
307	PRINT*, 'GETH_IDTS: Second of ODATE = ', scold
308	opass = .false.
309	END IF
310
311	IF (.not. npass) THEN
312	WRITE( wrf_err_message , * ) &
313	'module_date_time: geth_idts: Bad NDATE: ', ndate(1:nlen)
314	CALL wrf_error_fatal ( TRIM ( wrf_err_message ) )
315	END IF
316
317	IF (.not. opass) THEN
318	WRITE( wrf_err_message , * ) &
319	'module_date_time: geth_idts: Bad ODATE: ', odate(1:olen)
320	CALL wrf_error_fatal ( TRIM ( wrf_err_message ) )
321	END IF
322
323	! Date Checks are completed. Continue.
324
325	! Compute number of days from 1 January ODATE, 00:00:00 until ndate
326	! Compute number of hours from 1 January ODATE, 00:00:00 until ndate
327	! Compute number of minutes from 1 January ODATE, 00:00:00 until ndate
328
329	newdys = 0
330	DO i = yrold, yrnew - 1
331	newdys = newdys + (365 + (ndfeb(i)-28))
332	END DO
333
334	IF (monew .GT. 1) THEN
335	mday(2) = ndfeb(yrnew)
336	DO i = 1, monew - 1
337	newdys = newdys + mday(i)
338	END DO
339	mday(2) = 28
340	END IF
341
342	newdys = newdys + dynew-1
343
344	! Compute number of hours from 1 January ODATE, 00:00:00 until odate
345	! Compute number of minutes from 1 January ODATE, 00:00:00 until odate
346
347	olddys = 0
348
349	IF (moold .GT. 1) THEN
350	mday(2) = ndfeb(yrold)
351	DO i = 1, moold - 1
352	olddys = olddys + mday(i)
353	END DO
354	mday(2) = 28
355	END IF
356
357	olddys = olddys + dyold-1
358
359	! Determine the time difference in seconds
360
361	idts = (newdys - olddys) * 86400
362	idts = idts + (hrnew - hrold) * 3600
363	idts = idts + (minew - miold) * 60
364	idts = idts + (scnew - scold)
365
366	IF (isign .eq. -1) THEN
367	tdate=ndate
368	ndate=odate
369	odate=tdate
370	idts = idts * isign
371	END IF
372
373	END SUBROUTINE geth_idts
374
375	!*****************************************************************************
376
377	SUBROUTINE get_vert_stag(VarName,Stagger,vert_stag)
378
379	character (LEN=*) :: VarName
380	character (LEN=*) :: Stagger
381	logical :: vert_stag
382
383	if ((index(Stagger,'Z') > 0) .or. (VarName .eq. 'DNW') &
384	.or.(VarName .eq. 'RDNW')) then
385	vert_stag = .true.
386	else
387	vert_stag = .false.
388	endif
389	end SUBROUTINE
390
391	!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
392
393	FUNCTION ndfeb ( year ) RESULT (num_days)
394
395	! Compute the number of days in February for the given year
396
397	IMPLICIT NONE
398
399	INTEGER :: year
400	INTEGER :: num_days
401
402	num_days = 28 ! By default, February has 28 days ...
403	IF (MOD(year,4).eq.0) THEN
404	num_days = 29 ! But every four years, it has 29 days ...
405	IF (MOD(year,100).eq.0) THEN
406	num_days = 28 ! Except every 100 years, when it has 28 days ...
407	IF (MOD(year,400).eq.0) THEN
408	num_days = 29 ! Except every 400 years, when it has 29 days.
409	END IF
410	END IF
411	END IF
412
413	END FUNCTION ndfeb
414
415	!*****************************************************************************
416
417	SUBROUTINE get_dimvals(MemoryOrder,x,y,z,dims)
418
419	IMPLICIT NONE
420	CHARACTER (LEN=*) ,INTENT(IN) :: MemoryOrder
421	INTEGER ,INTENT(IN) :: x,y,z
422	INTEGER, DIMENSION(*),INTENT(OUT) :: dims
423	INTEGER :: idx
424	CHARACTER (LEN=1) :: char
425	CHARACTER (LEN=3) :: MemoryOrderLcl
426
427	dims(1) = 1
428	dims(2) = 1
429	dims(3) = 1
430
431	! Fix for out-of-bounds references
432	MemoryOrderLcl = ' '
433	do idx=1,len_trim(MemoryOrder)
434	MemoryOrderLcl(idx:idx) = MemoryOrder(idx:idx)
435	enddo
436
437	!
438	! Note: Need to add "char == 'S'" for boundary conditions
439	!
440
441	if ((MemoryOrderLcl(1:3) .eq. 'XSZ') &
442	.or. (MemoryOrderLcl(1:3) .eq. 'XEZ')) then
443	dims(1) = y
444	dims(2) = z
445	dims(3) = x
446	else if ((MemoryOrderLcl(1:3) .eq. 'YSZ') .or. &
447	(MemoryOrderLcl(1:3) .eq. 'YEZ')) then
448	dims(1) = x
449	dims(2) = z
450	dims(3) = y
451	else if ((MemoryOrderLcl(1:2) .eq. 'YS') .or. &
452	(MemoryOrderLcl(1:2) .eq. 'YE')) then
453	dims(1) = x
454	dims(2) = y
455	dims(3) = z
456	else if ((MemoryOrderLcl(1:2) .eq. 'XS') .or. &
457	(MemoryOrderLcl(1:2) .eq. 'XE')) then
458	dims(1) = y
459	dims(2) = x
460	dims(3) = z
461	else if ((MemoryOrderLcl(1:1) .eq. 'C') .or. &
462	(MemoryOrderLcl(1:1) .eq. 'c')) then
463	! Non-decomposed field
464	dims(1) = x
465	dims(2) = y
466	dims(3) = z
467	else
468	do idx=1,len_trim(MemoryOrderLcl)
469	char = MemoryOrderLcl(idx:idx)
470	if ((char == 'X') .or. (char == 'x')) then
471	dims(idx) = x
472	else if ((char == 'Y') .or. (char == 'y')) then
473	dims(idx) = y
474	else if ((char == 'Z') .or. (char == 'z')) then
475	dims(idx) = z
476	else if (char == '0') then
477	! This is a scalar, do nothing.
478	else
479	call wrf_message ('Invalid Dimension in get_dimvals: '//char)
480	endif
481	enddo
482	endif
483
484	END SUBROUTINE get_dimvals
485
486	!*****************************************************************************
487
488	SUBROUTINE get_soil_layers(VarName,soil_layers)
489
490	character (LEN=*) :: VarName
491	logical :: soil_layers
492
493	if ((VarName .eq. 'ZS') .or. (VarName .eq. 'DZS') &
494	.or.(VarName .eq. 'TSLB') .or. (VarName .eq. 'SMOIS') &
495	.or. (VarName .eq. 'SH2O') .or. (VarName .eq. 'KEEPFR3DFLAG') &
496	.or. (VarName .eq. 'SMFR3D')) then
497	soil_layers = .true.
498	else
499	soil_layers = .false.
500	endif
501	end SUBROUTINE
502
503	!*****************************************************************************
504
505	SUBROUTINE Transpose(MemoryOrder, di, FieldType, Field, &
506	Start1, End1, Start2, End2, Start3, End3, data, zidx, numrows, numcols)
507
508	IMPLICIT NONE
509
510	#include "wrf_io_flags.h"
511
512	CHARACTER (LEN=*),INTENT(IN) :: MemoryOrder
513	INTEGER ,INTENT(IN) :: Start1,End1,Start2,End2,Start3,End3
514	INTEGER ,INTENT(IN) :: di
515	integer ,intent(inout) :: &
516	Field(di,Start1:End1,Start2:End2,Start3:End3)
517	INTEGER ,intent(in) :: FieldType
518	real ,intent(in) :: data(*)
519	INTEGER ,INTENT(IN) :: zidx, numcols, numrows
520	INTEGER, DIMENSION(3) :: dims
521	INTEGER :: col, row
522	LOGICAL :: logicaltype
523	CHARACTER (LEN=1000) :: msg
524
525	if ((FieldType == WRF_REAL) .or. (FieldType == WRF_DOUBLE)) then
526	do col=1,numcols
527	do row=1,numrows
528	call get_dimvals(MemoryOrder,col,row,zidx,dims)
529	Field(1:di,dims(1),dims(2),dims(3)) = &
530	TRANSFER(data((row-1)*numcols+col),Field,1)
531	enddo
532	enddo
533	else if (FieldType == WRF_INTEGER) then
534	do col=1,numcols
535	do row=1,numrows
536	call get_dimvals(MemoryOrder,col,row,zidx,dims)
537	Field(1:di,dims(1),dims(2),dims(3)) = data((row-1)*numcols+col)
538	enddo
539	enddo
540	else
541	write (msg,*)'Reading of type ',FieldType,'from grib data not supported'
542	call wrf_message(msg)
543	endif
544
545	!
546	! This following seciton is for the logical type. This caused some problems
547	! on certain platforms.
548	!
549	! else if (FieldType == WRF_LOGICAL) then
550	! do col=1,numcols
551	! do row=1,numrows
552	! call get_dimvals(MemoryOrder,col,row,zidx,dims)
553	! Field(1:di,dims(1),dims(2),dims(3)) = &
554	! TRANSFER(data((row-1)*numcols+col),logicaltype,1)
555	! enddo
556	! enddo
557
558
559	end SUBROUTINE
560
561	!*****************************************************************************
562
563	SUBROUTINE Transpose1D(MemoryOrder, di, FieldType, Field, &
564	Start1, End1, Start2, End2, Start3, End3, data, nelems)
565
566	IMPLICIT NONE
567
568	#include "wrf_io_flags.h"
569
570	CHARACTER (LEN=*),INTENT(IN) :: MemoryOrder
571	INTEGER ,INTENT(IN) :: Start1,End1,Start2,End2,Start3,End3
572	INTEGER ,INTENT(IN) :: di
573	integer ,intent(inout) :: &
574	Field(di,Start1:End1,Start2:End2,Start3:End3)
575	INTEGER ,intent(in) :: FieldType
576	real ,intent(in) :: data(*)
577	LOGICAL :: logicaltype
578	CHARACTER (LEN=1000) :: msg
579	integer :: elemnum,nelems
580
581	if ((FieldType == WRF_REAL) .or. (FieldType == WRF_DOUBLE)) then
582	do elemnum=1,nelems
583	Field(1:di,elemnum,1,1) = TRANSFER(data(elemnum),Field,1)
584	enddo
585	else if (FieldType == WRF_INTEGER) then
586	do elemnum=1,nelems
587	Field(1:di,elemnum,1,1) = TRANSFER(data(elemnum),Field,1)
588	enddo
589	else
590	write (msg,*)'Reading of type ',FieldType,'from grib1 data not supported'
591	call wrf_message(msg)
592	endif
593
594	!
595	! This following seciton is for the logical type. This caused some problems
596	! on certain platforms.
597	!
598	! else if (FieldType == WRF_LOGICAL) then
599	! do col=1,numcols
600	! do row=1,numrows
601	! call get_dimvals(MemoryOrder,col,row,zidx,dims)
602	! Field(1:di,dims(1),dims(2),dims(3)) = &
603	! TRANSFER(data((row-1)*numcols+col),logicaltype,1)
604	! enddo
605	! enddo
606
607
608	end SUBROUTINE Transpose1D
609
610	!*****************************************************************************
611	!
612	! Takes a starting date (startTime) in WRF format (yyyy-mm-dd_hh:mm:ss),
613	! adds an input number of seconds to the time, and outputs a new date
614	! (endTime) in WRF format.
615	!
616	!*****************************************************************************
617
618	subroutine advance_wrf_time(startTime, addsecs, endTime)
619	implicit none
620
621	integer , intent(in) :: addsecs
622	character (len=*), intent(in) :: startTime
623	character (len=*), intent(out) :: endTime
624	integer :: syear,smonth,sday,shour,smin,ssec
625	integer :: days_in_month(12)
626
627	read(startTime,'(I4.4,1X,I2.2,1X,I2.2,1X,I2.2,1X,I2.2,1X,I2.2)') &
628	syear,smonth,sday,shour,smin,ssec
629
630	ssec = ssec + addsecs
631
632	do while (ssec .ge. 60)
633	smin = smin + 1
634	ssec = ssec - 60
635	enddo
636
637	do while (smin .ge. 60)
638	shour = shour + 1
639	smin = smin - 60
640	enddo
641
642	do while (shour .ge. 24)
643	sday = sday + 1
644	shour = shour - 24
645	enddo
646
647
648	days_in_month(1) = 31
649	if (((mod(syear,4) .eq. 0) .and. (mod(syear,100) .ne. 0)) &
650	.or. (mod(syear,400) .eq. 0)) then
651	days_in_month(2) = 29
652	else
653	days_in_month(2) = 28
654	endif
655	days_in_month(3) = 31
656	days_in_month(4) = 30
657	days_in_month(5) = 31
658	days_in_month(6) = 30
659	days_in_month(7) = 31
660	days_in_month(8) = 31
661	days_in_month(9) = 30
662	days_in_month(10) = 31
663	days_in_month(11) = 30
664	days_in_month(12) = 31
665
666
667	do while (sday .gt. days_in_month(smonth))
668	sday = sday - days_in_month(smonth)
669	smonth = smonth + 1
670	if (smonth .gt. 12) then
671	smonth = 1
672	syear = syear + 1
673	endif
674	enddo
675
676
677	write(endTime,'(I4.4,A,I2.2,A,I2.2,A,I2.2,A,I2.2,A,I2.2)') &
678	syear,'-',smonth,'-',sday,'_',shour,':',smin,':',ssec
679
680	return
681
682	end subroutine

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