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source: palm/trunk/SOURCE/spectra_mod.f90 @ 3358

Last change on this file since 3358 was 3248, checked in by sward, 6 years ago
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1	!> @file spectra_mod.f90
2	!------------------------------------------------------------------------------!
3	! This file is part of the PALM model system.
4	!
5	! PALM is free software: you can redistribute it and/or modify it under the
6	! terms of the GNU General Public License as published by the Free Software
7	! Foundation, either version 3 of the License, or (at your option) any later
8	! version.
9	!
10	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
11	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
13	!
14	! You should have received a copy of the GNU General Public License along with
15	! PALM. If not, see <http://www.gnu.org/licenses/>.
16	!
17	! Copyright 1997-2018 Leibniz Universitaet Hannover
18	!------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! -----------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: spectra_mod.f90 3248 2018-09-14 09:42:06Z knoop $
27	! Minor formating changes
28	!
29	! 3246 2018-09-13 15:14:50Z sward
30	! Added error handling for input namelist via parin_fail_message
31	!
32	! 3241 2018-09-12 15:02:00Z raasch
33	! unused variables removed
34	!
35	! 3049 2018-05-29 13:52:36Z Giersch
36	! Error messages revised
37	!
38	! 3045 2018-05-28 07:55:41Z Giersch
39	! Error message revised
40	!
41	! 2956 2018-04-10 11:01:03Z Giersch
42	! spectrum_x and spectrum_y will only be allocated if they are not allocated
43	! before (e.g. in case of restart runs)
44	!
45	! 2932 2018-03-26 09:39:22Z maronga
46	! renamed spectra_par to spectra_parameters
47	!
48	! 2841 2018-02-27 15:02:57Z knoop
49	! Bugfix: wrong placement of include 'mpif.h' corrected
50	!
51	! 2718 2018-01-02 08:49:38Z maronga
52	! Corrected "Former revisions" section
53	!
54	! 2696 2017-12-14 17:12:51Z kanani
55	! Change in file header (GPL part)
56	!
57	! 2216 2017-04-28 12:54:20Z suehring
58	!
59	! 2193 2017-03-22 04:21:28Z raasch
60	! Normalization of spectra output adjusted
61	!
62	! 2192 2017-03-22 04:14:10Z raasch
63	! bugfix for index bounds of arrays spectrum_x and spectrum_y
64	!
65	! 2000 2016-08-20 18:09:15Z knoop
66	! Forced header and separation lines into 80 columns
67	!
68	! 1960 2016-07-12 16:34:24Z suehring
69	! Additional default spectra for passive scalar
70	!
71	! 1833 2016-04-07 14:23:03Z raasch
72	! file renamed, reading the spectra_par NAMELIST moved from package_parin to
73	! here
74	!
75	! 1815 2016-04-06 13:49:59Z raasch
76	! bugfix: preprocessor directives included for the non-parallel case
77	!
78	! 1808 2016-04-05 19:44:00Z raasch
79	! MPI module used by default on all machines
80	!
81	! 1786 2016-03-08 05:49:27Z raasch
82	! routine is modularized, filename renamed from calc_spectra to spectrum,
83	! privious data module spectrum moved from modules.f90 to here,
84	! cpp-direktives for spectra removed, immediate return if no spectra levels are
85	! given
86	!
87	! 1682 2015-10-07 23:56:08Z knoop
88	! Code annotations made doxygen readable
89	!
90	! 1575 2015-03-27 09:56:27Z raasch
91	! adjustments for psolver-queries
92	!
93	! 1511 2014-12-16 15:54:16Z suehring
94	! Bugfix concerning spectra normalization
95	!
96	! 1431 2014-07-15 14:47:17Z suehring
97	! Wavenumber-integrated spectra coincide with respective variance.
98	!
99	! 1342 2014-03-26 17:04:47Z kanani
100	! REAL constants defined as wp-kinds
101	!
102	! 1324 2014-03-21 09:13:16Z suehring
103	! Bugfix: nzb_x, nzb_yd, nyn_x, nyn_x, nzt_x, nzt_yd belong to transpose_indices
104	!
105	! 1320 2014-03-20 08:40:49Z raasch
106	! ONLY-attribute added to USE-statements,
107	! kind-parameters added to all INTEGER and REAL declaration statements,
108	! kinds are defined in new module kinds,
109	! revision history before 2012 removed,
110	! comment fields (!:) to be used for variable explanations added to
111	! all variable declaration statements
112	!
113	! 1318 2014-03-17 13:35:16Z raasch
114	! module interfaces removed
115	!
116	! 1216 2013-08-26 09:31:42Z raasch
117	! resorting of array moved to separate routine resort_for_zx,
118	! one argument removed from the transpose_..d routines
119	!
120	! 1120 2013-04-05 15:11:35Z raasch
121	! bugfix: calls of fft_x\|y replaced by fft_x\|y_1d
122	!
123	! 1036 2012-10-22 13:43:42Z raasch
124	! code put under GPL (PALM 3.9)
125	!
126	! 1003 2012-09-14 14:35:53Z raasch
127	! adjustment of array tend for cases with unequal subdomain sizes removed
128	!
129	! Revision 1.1 2001/01/05 15:08:07 raasch
130	! Initial revision
131	!
132	!
133	! Description:
134	! ------------
135	!> Calculate horizontal spectra along x and y.
136	!> ATTENTION: 1d-decomposition along y still needs improvement, because in that
137	!> case the gridpoint number along z still depends on the PE number
138	!> because transpose_xz has to be used (and possibly also
139	!> transpose_zyd needs modification).
140	!------------------------------------------------------------------------------!
141	MODULE spectra_mod
142
143	USE kinds
144
145	PRIVATE
146
147	CHARACTER (LEN=2), DIMENSION(10) :: spectra_direction = 'x'
148	CHARACTER (LEN=10), DIMENSION(10) :: data_output_sp = ' '
149
150	INTEGER(iwp) :: average_count_sp = 0
151	INTEGER(iwp) :: dosp_time_count = 0
152	INTEGER(iwp) :: n_sp_x = 0, n_sp_y = 0
153
154	INTEGER(iwp) :: comp_spectra_level(100) = 999999
155
156	LOGICAL :: calculate_spectra = .FALSE. !< internal switch that spectra are calculated
157	LOGICAL :: spectra_initialized = .FALSE. !< internal switch that spectra related quantities are initialized
158
159	REAL(wp) :: averaging_interval_sp = 9999999.9_wp !< averaging interval for spectra output
160	REAL(wp) :: dt_dosp = 9999999.9_wp !< time interval for spectra output
161	REAL(wp) :: skip_time_dosp = 9999999.9_wp !< no output of spectra data before this interval has passed
162
163	REAL(wp), DIMENSION(:), ALLOCATABLE :: var_d
164
165	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: spectrum_x, spectrum_y
166
167	SAVE
168
169	INTERFACE calc_spectra
170	MODULE PROCEDURE calc_spectra
171	END INTERFACE calc_spectra
172
173	INTERFACE preprocess_spectra
174	MODULE PROCEDURE preprocess_spectra
175	END INTERFACE preprocess_spectra
176
177	INTERFACE calc_spectra_x
178	MODULE PROCEDURE calc_spectra_x
179	END INTERFACE calc_spectra_x
180
181	INTERFACE calc_spectra_y
182	MODULE PROCEDURE calc_spectra_y
183	END INTERFACE calc_spectra_y
184
185	INTERFACE spectra_check_parameters
186	MODULE PROCEDURE spectra_check_parameters
187	END INTERFACE spectra_check_parameters
188
189	INTERFACE spectra_header
190	MODULE PROCEDURE spectra_header
191	END INTERFACE spectra_header
192
193	INTERFACE spectra_init
194	MODULE PROCEDURE spectra_init
195	END INTERFACE spectra_init
196
197	INTERFACE spectra_parin
198	MODULE PROCEDURE spectra_parin
199	END INTERFACE spectra_parin
200
201	PUBLIC average_count_sp, averaging_interval_sp, calc_spectra, &
202	calculate_spectra, comp_spectra_level, data_output_sp, &
203	dosp_time_count, dt_dosp, n_sp_x, n_sp_y, plot_spectra_level, &
204	skip_time_dosp, spectra_check_parameters, spectra_direction, &
205	spectra_header, spectra_init, spectra_parin, spectrum_x, &
206	spectrum_y, var_d
207
208
209	CONTAINS
210
211	!------------------------------------------------------------------------------!
212	! Description:
213	! ------------
214	!> Parin for &spectra_par for calculating spectra
215	!------------------------------------------------------------------------------!
216	SUBROUTINE spectra_parin
217
218	USE control_parameters, &
219	ONLY: dt_data_output, message_string
220
221	IMPLICIT NONE
222
223	CHARACTER (LEN=80) :: line !< dummy string that contains the current &
224	!< line of the parameter file
225
226	NAMELIST /spectra_par/ averaging_interval_sp, comp_spectra_level, &
227	data_output_sp, dt_dosp, skip_time_dosp, &
228	spectra_direction
229
230	NAMELIST /spectra_parameters/ &
231	averaging_interval_sp, comp_spectra_level, &
232	data_output_sp, dt_dosp, skip_time_dosp, &
233	spectra_direction
234	!
235	!-- Position the namelist-file at the beginning (it was already opened in
236	!-- parin), search for the namelist-group of the package and position the
237	!-- file at this line.
238	line = ' '
239
240	!
241	!-- Try to find the spectra package
242	REWIND ( 11 )
243	line = ' '
244	DO WHILE ( INDEX( line, '&spectra_parameters' ) == 0 )
245	READ ( 11, '(A)', END=12 ) line
246	ENDDO
247	BACKSPACE ( 11 )
248
249	!
250	!-- Read namelist
251	READ ( 11, spectra_parameters, ERR = 10 )
252
253	!
254	!-- Default setting of dt_dosp here (instead of check_parameters), because
255	!-- its current value is needed in init_pegrid
256	IF ( dt_dosp == 9999999.9_wp ) dt_dosp = dt_data_output
257
258	!
259	!-- Set general switch that spectra shall be calculated
260	calculate_spectra = .TRUE.
261
262	GOTO 14
263
264	10 BACKSPACE( 11 )
265	READ( 11 , '(A)') line
266	CALL parin_fail_message( 'spectra_parameters', line )
267	!
268	!-- Try to find the old namelist
269	12 REWIND ( 11 )
270	line = ' '
271	DO WHILE ( INDEX( line, '&spectra_par' ) == 0 )
272	READ ( 11, '(A)', END=14 ) line
273	ENDDO
274	BACKSPACE ( 11 )
275
276	!
277	!-- Read namelist
278	READ ( 11, spectra_par, ERR = 13, END = 14 )
279
280
281	message_string = 'namelist spectra_par is deprecated and will be ' // &
282	'removed in near future. Please use namelist ' // &
283	'spectra_parameters instead'
284	CALL message( 'spectra_parin', 'PA0487', 0, 1, 0, 6, 0 )
285	!
286	!-- Default setting of dt_dosp here (instead of check_parameters), because
287	!-- its current value is needed in init_pegrid
288	IF ( dt_dosp == 9999999.9_wp ) dt_dosp = dt_data_output
289
290	!
291	!-- Set general switch that spectra shall be calculated
292	calculate_spectra = .TRUE.
293
294	GOTO 14
295
296	13 BACKSPACE( 11 )
297	READ( 11 , '(A)') line
298	CALL parin_fail_message( 'spectra_par', line )
299
300
301	14 CONTINUE
302
303	END SUBROUTINE spectra_parin
304
305
306
307	!------------------------------------------------------------------------------!
308	! Description:
309	! ------------
310	!> Initialization of spectra related variables
311	!------------------------------------------------------------------------------!
312	SUBROUTINE spectra_init
313
314	USE indices, &
315	ONLY: nx, ny, nzb, nzt
316
317	IMPLICIT NONE
318
319	IF ( spectra_initialized ) RETURN
320
321	IF ( dt_dosp /= 9999999.9_wp ) THEN
322
323	IF ( .NOT. ALLOCATED( spectrum_x ) ) THEN
324	ALLOCATE( spectrum_x( 1:nx/2, 1:100, 1:10 ) )
325	spectrum_x = 0.0_wp
326	ENDIF
327
328	IF ( .NOT. ALLOCATED( spectrum_y ) ) THEN
329	ALLOCATE( spectrum_y( 1:ny/2, 1:100, 1:10 ) )
330	spectrum_y = 0.0_wp
331	ENDIF
332
333	ALLOCATE( var_d(nzb:nzt+1) )
334	var_d = 0.0_wp
335	ENDIF
336
337	spectra_initialized = .TRUE.
338
339	END SUBROUTINE spectra_init
340
341
342
343	!------------------------------------------------------------------------------!
344	! Description:
345	! ------------
346	!> Check spectra related quantities
347	!------------------------------------------------------------------------------!
348	SUBROUTINE spectra_check_parameters
349
350	USE control_parameters, &
351	ONLY: averaging_interval, message_string, skip_time_data_output
352
353	IMPLICIT NONE
354
355	!
356	!-- Check the average interval
357	IF ( averaging_interval_sp == 9999999.9_wp ) THEN
358	averaging_interval_sp = averaging_interval
359	ENDIF
360
361	IF ( averaging_interval_sp > dt_dosp ) THEN
362	WRITE( message_string, * ) 'averaging_interval_sp = ', &
363	averaging_interval_sp, ' must be <= dt_dosp = ', dt_dosp
364	CALL message( 'spectra_check_parameters', 'PA0087', 1, 2, 0, 6, 0 )
365	ENDIF
366
367	!
368	!-- Set the default skip time interval for data output, if necessary
369	IF ( skip_time_dosp == 9999999.9_wp ) &
370	skip_time_dosp = skip_time_data_output
371
372	END SUBROUTINE spectra_check_parameters
373
374
375
376	!------------------------------------------------------------------------------!
377	! Description:
378	! ------------
379	!> Header output for spectra
380	!>
381	!> @todo Output of netcdf data format and compression level
382	!------------------------------------------------------------------------------!
383	SUBROUTINE spectra_header ( io )
384
385	USE control_parameters, &
386	ONLY: dt_averaging_input_pr
387
388	! USE netcdf_interface, &
389	! ONLY: netcdf_data_format_string, netcdf_deflate
390
391	IMPLICIT NONE
392
393	! CHARACTER (LEN=40) :: output_format !< internal string
394
395	INTEGER(iwp) :: i !< internal counter
396	INTEGER(iwp), INTENT(IN) :: io !< Unit of the output file
397
398	!
399	!-- Spectra output
400	IF ( dt_dosp /= 9999999.9_wp ) THEN
401	WRITE ( io, 1 )
402
403	! output_format = netcdf_data_format_string
404	! IF ( netcdf_deflate == 0 ) THEN
405	! WRITE ( io, 2 ) output_format
406	! ELSE
407	! WRITE ( io, 3 ) TRIM( output_format ), netcdf_deflate
408	! ENDIF
409	WRITE ( io, 2 ) 'see profiles or other quantities'
410	WRITE ( io, 4 ) dt_dosp
411	IF ( skip_time_dosp /= 0.0_wp ) WRITE ( io, 5 ) skip_time_dosp
412	WRITE ( io, 6 ) ( data_output_sp(i), i = 1,10 ), &
413	( spectra_direction(i), i = 1,10 ), &
414	( comp_spectra_level(i), i = 1,100 ), &
415	averaging_interval_sp, dt_averaging_input_pr
416	ENDIF
417
418	1 FORMAT (' Spectra:')
419	2 FORMAT (' Output format: ',A/)
420	! 3 FORMAT (' Output format: ',A, ' compressed with level: ',I1/)
421	4 FORMAT (' Output every ',F7.1,' s'/)
422	5 FORMAT (' No output during initial ',F8.2,' s')
423	6 FORMAT (' Arrays: ', 10(A5,',')/ &
424	' Directions: ', 10(A5,',')/ &
425	' height levels k = ', 20(I3,',')/ &
426	' ', 20(I3,',')/ &
427	' ', 20(I3,',')/ &
428	' ', 20(I3,',')/ &
429	' ', 19(I3,','),I3,'.'/ &
430	' Time averaged over ', F7.1, ' s,' / &
431	' Profiles for the time averaging are taken every ', &
432	F6.1,' s')
433
434	END SUBROUTINE spectra_header
435
436
437
438	SUBROUTINE calc_spectra
439
440	USE arrays_3d, &
441	ONLY: d, tend
442
443	USE control_parameters, &
444	ONLY: bc_lr_cyc, bc_ns_cyc, message_string, psolver
445
446	USE cpulog, &
447	ONLY: cpu_log, log_point
448
449	USE fft_xy, &
450	ONLY: fft_init
451
452	USE indices, &
453	ONLY: nxl, nxr, nyn, nys, nzb, nzt
454
455	USE kinds
456
457	USE pegrid, &
458	ONLY: myid, pdims
459
460	IMPLICIT NONE
461
462	INTEGER(iwp) :: m !<
463	INTEGER(iwp) :: pr !<
464
465
466	!
467	!-- Check if user gave any levels for spectra to be calculated
468	IF ( comp_spectra_level(1) == 999999 ) RETURN
469
470	CALL cpu_log( log_point(30), 'calc_spectra', 'start' )
471
472	!
473	!-- Initialize spectra related quantities
474	CALL spectra_init
475
476	!
477	!-- Initialize ffts
478	CALL fft_init
479
480	!
481	!-- Reallocate array d in required size
482	IF ( psolver(1:9) == 'multigrid' ) THEN
483	DEALLOCATE( d )
484	ALLOCATE( d(nzb+1:nzt,nys:nyn,nxl:nxr) )
485	ENDIF
486
487	m = 1
488	DO WHILE ( data_output_sp(m) /= ' ' .AND. m <= 10 )
489	!
490	!-- Transposition from z --> x ( y --> x in case of a 1d-decomposition
491	!-- along x)
492	IF ( INDEX( spectra_direction(m), 'x' ) /= 0 ) THEN
493
494	!
495	!-- Calculation of spectra works for cyclic boundary conditions only
496	IF ( .NOT. bc_lr_cyc ) THEN
497
498	message_string = 'non-cyclic lateral boundaries along x do'// &
499	' not & allow calculation of spectra along x'
500	CALL message( 'calc_spectra', 'PA0160', 1, 2, 0, 6, 0 )
501	ENDIF
502
503	CALL preprocess_spectra( m, pr )
504
505	#if defined( __parallel )
506	IF ( pdims(2) /= 1 ) THEN
507	CALL resort_for_zx( d, tend )
508	CALL transpose_zx( tend, d )
509	ELSE
510	CALL transpose_yxd( d, d )
511	ENDIF
512	CALL calc_spectra_x( d, m )
513	#else
514	message_string = 'sorry, calculation of spectra in non paral' // &
515	'lel mode& is still not realized'
516	CALL message( 'calc_spectra', 'PA0161', 1, 2, 0, 6, 0 )
517	#endif
518
519	ENDIF
520
521	!
522	!-- Transposition from z --> y (d is rearranged only in case of a
523	!-- 1d-decomposition along x)
524	IF ( INDEX( spectra_direction(m), 'y' ) /= 0 ) THEN
525
526	!
527	!-- Calculation of spectra works for cyclic boundary conditions only
528	IF ( .NOT. bc_ns_cyc ) THEN
529	IF ( myid == 0 ) THEN
530	message_string = 'non-cyclic lateral boundaries along y' // &
531	' do not & allow calculation of spectra' //&
532	' along y'
533	CALL message( 'calc_spectra', 'PA0162', 1, 2, 0, 6, 0 )
534	ENDIF
535	CALL local_stop
536	ENDIF
537
538	CALL preprocess_spectra( m, pr )
539
540	#if defined( __parallel )
541	CALL transpose_zyd( d, d )
542	CALL calc_spectra_y( d, m )
543	#else
544	message_string = 'sorry, calculation of spectra in non paral' // &
545	'lel mode& is still not realized'
546	CALL message( 'calc_spectra', 'PA0161', 1, 2, 0, 6, 0 )
547	#endif
548
549	ENDIF
550
551	!
552	!-- Increase counter for next spectrum
553	m = m + 1
554
555	ENDDO
556
557	!
558	!-- Increase counter for averaging process in routine plot_spectra
559	average_count_sp = average_count_sp + 1
560
561	CALL cpu_log( log_point(30), 'calc_spectra', 'stop' )
562
563	END SUBROUTINE calc_spectra
564
565
566	!------------------------------------------------------------------------------!
567	! Description:
568	! ------------
569	!> @todo Missing subroutine description.
570	!------------------------------------------------------------------------------!
571	SUBROUTINE preprocess_spectra( m, pr )
572
573	USE arrays_3d, &
574	ONLY: d, pt, q, s, u, v, w
575
576	USE indices, &
577	ONLY: ngp_2dh, nxl, nxr, nyn, nys, nzb, nzt
578
579	USE kinds
580
581	#if defined( __parallel )
582	#if !defined( __mpifh )
583	USE MPI
584	#endif
585	#endif
586
587	USE pegrid, &
588	ONLY: collective_wait, comm2d, ierr
589
590	USE statistics, &
591	ONLY: hom
592
593
594	IMPLICIT NONE
595
596	#if defined( __parallel )
597	#if defined( __mpifh )
598	INCLUDE "mpif.h"
599	#endif
600	#endif
601
602	INTEGER(iwp) :: i !<
603	INTEGER(iwp) :: j !<
604	INTEGER(iwp) :: k !<
605	INTEGER(iwp) :: m !<
606	INTEGER(iwp) :: pr !<
607
608	REAL(wp), DIMENSION(nzb:nzt+1) :: var_d_l
609
610	SELECT CASE ( TRIM( data_output_sp(m) ) )
611
612	CASE ( 'u' )
613	pr = 1
614	d(nzb+1:nzt,nys:nyn,nxl:nxr) = u(nzb+1:nzt,nys:nyn,nxl:nxr)
615
616	CASE ( 'v' )
617	pr = 2
618	d(nzb+1:nzt,nys:nyn,nxl:nxr) = v(nzb+1:nzt,nys:nyn,nxl:nxr)
619
620	CASE ( 'w' )
621	pr = 3
622	d(nzb+1:nzt,nys:nyn,nxl:nxr) = w(nzb+1:nzt,nys:nyn,nxl:nxr)
623
624	CASE ( 'pt' )
625	pr = 4
626	d(nzb+1:nzt,nys:nyn,nxl:nxr) = pt(nzb+1:nzt,nys:nyn,nxl:nxr)
627
628	CASE ( 'q' )
629	pr = 41
630	d(nzb+1:nzt,nys:nyn,nxl:nxr) = q(nzb+1:nzt,nys:nyn,nxl:nxr)
631
632	CASE ( 's' )
633	pr = 117
634	d(nzb+1:nzt,nys:nyn,nxl:nxr) = s(nzb+1:nzt,nys:nyn,nxl:nxr)
635
636	CASE DEFAULT
637	!
638	!-- The DEFAULT case is reached either if the parameter data_output_sp(m)
639	!-- contains a wrong character string or if the user has coded a special
640	!-- case in the user interface. There, the subroutine user_spectra
641	!-- checks which of these two conditions applies.
642	CALL user_spectra( 'preprocess', m, pr )
643
644	END SELECT
645
646	!
647	!-- Subtract horizontal mean from the array, for which spectra have to be
648	!-- calculated. Moreover, calculate variance of the respective quantitiy,
649	!-- later used for normalizing spectra output.
650	var_d_l(:) = 0.0_wp
651	DO i = nxl, nxr
652	DO j = nys, nyn
653	DO k = nzb+1, nzt
654	d(k,j,i) = d(k,j,i) - hom(k,1,pr,0)
655	var_d_l(k) = var_d_l(k) + d(k,j,i) * d(k,j,i)
656	ENDDO
657	ENDDO
658	ENDDO
659	!
660	!-- Compute total variance from local variances
661	var_d(:) = 0.0_wp
662	#if defined( __parallel )
663	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
664	CALL MPI_ALLREDUCE( var_d_l(0), var_d(0), nzt+1-nzb, MPI_REAL, MPI_SUM, &
665	comm2d, ierr )
666	#else
667	var_d(:) = var_d_l(:)
668	#endif
669	var_d(:) = var_d(:) / ngp_2dh(0)
670
671	END SUBROUTINE preprocess_spectra
672
673
674	!------------------------------------------------------------------------------!
675	! Description:
676	! ------------
677	!> @todo Missing subroutine description.
678	!------------------------------------------------------------------------------!
679	SUBROUTINE calc_spectra_x( ddd, m )
680
681	USE fft_xy, &
682	ONLY: fft_x_1d
683
684	USE grid_variables, &
685	ONLY: dx
686
687	USE indices, &
688	ONLY: nx, ny
689
690	USE kinds
691
692	#if defined( __parallel )
693	#if !defined( __mpifh )
694	USE MPI
695	#endif
696	#endif
697
698	USE pegrid, &
699	ONLY: comm2d, ierr, myid
700
701	USE transpose_indices, &
702	ONLY: nyn_x, nys_x, nzb_x, nzt_x
703
704
705	IMPLICIT NONE
706
707	#if defined( __parallel )
708	#if defined( __mpifh )
709	INCLUDE "mpif.h"
710	#endif
711	#endif
712
713	INTEGER(iwp) :: i !<
714	INTEGER(iwp) :: j !<
715	INTEGER(iwp) :: k !<
716	INTEGER(iwp) :: m !<
717	INTEGER(iwp) :: n !<
718
719	REAL(wp) :: exponent !<
720	REAL(wp) :: sum_spec_dum !< wavenumber-integrated spectrum
721
722	REAL(wp), DIMENSION(0:nx) :: work !<
723
724	REAL(wp), DIMENSION(0:nx/2) :: sums_spectra_l !<
725
726	REAL(wp), DIMENSION(0:nx/2,100) :: sums_spectra !<
727
728	REAL(wp), DIMENSION(0:nx,nys_x:nyn_x,nzb_x:nzt_x) :: ddd !<
729
730	!
731	!-- Exponent for geometric average
732	exponent = 1.0_wp / ( ny + 1.0_wp )
733
734	!
735	!-- Loop over all levels defined by the user
736	n = 1
737	DO WHILE ( comp_spectra_level(n) /= 999999 .AND. n <= 100 )
738
739	k = comp_spectra_level(n)
740
741	!
742	!-- Calculate FFT only if the corresponding level is situated on this PE
743	IF ( k >= nzb_x .AND. k <= nzt_x ) THEN
744
745	DO j = nys_x, nyn_x
746
747	work = ddd(0:nx,j,k)
748	CALL fft_x_1d( work, 'forward' )
749
750	ddd(0,j,k) = dx * work(0)**2
751	DO i = 1, nx/2
752	ddd(i,j,k) = dx * ( work(i)2 + work(nx+1-i)2 )
753	ENDDO
754
755	ENDDO
756
757	!
758	!-- Local sum and geometric average of these spectra
759	!-- (WARNING: no global sum should be performed, because floating
760	!-- point overflow may occur)
761	DO i = 0, nx/2
762
763	sums_spectra_l(i) = 1.0_wp
764	DO j = nys_x, nyn_x
765	sums_spectra_l(i) = sums_spectra_l(i) * ddd(i,j,k)**exponent
766	ENDDO
767
768	ENDDO
769
770	ELSE
771
772	sums_spectra_l = 1.0_wp
773
774	ENDIF
775
776	!
777	!-- Global sum of spectra on PE0 (from where they are written on file)
778	sums_spectra(:,n) = 0.0_wp
779	#if defined( __parallel )
780	CALL MPI_BARRIER( comm2d, ierr ) ! Necessary?
781	CALL MPI_REDUCE( sums_spectra_l(0), sums_spectra(0,n), nx/2+1, &
782	MPI_REAL, MPI_PROD, 0, comm2d, ierr )
783	#else
784	sums_spectra(:,n) = sums_spectra_l
785	#endif
786	!
787	!-- Normalize spectra by variance
788	sum_spec_dum = SUM( sums_spectra(1:nx/2,n) )
789
790	IF ( sum_spec_dum /= 0.0_wp ) THEN
791	sums_spectra(1:nx/2,n) = sums_spectra(1:nx/2,n) * &
792	var_d(k) / sum_spec_dum
793	ENDIF
794	n = n + 1
795
796	ENDDO
797	n = n - 1
798
799	IF ( myid == 0 ) THEN
800	!
801	!-- Sum of spectra for later averaging (see routine data_output_spectra)
802	DO i = 1, nx/2
803	DO k = 1, n
804	spectrum_x(i,k,m) = spectrum_x(i,k,m) + sums_spectra(i,k)
805	ENDDO
806	ENDDO
807
808	ENDIF
809	!
810	!-- n_sp_x is needed by data_output_spectra_x
811	n_sp_x = n
812
813	END SUBROUTINE calc_spectra_x
814
815
816	!------------------------------------------------------------------------------!
817	! Description:
818	! ------------
819	!> @todo Missing subroutine description.
820	!------------------------------------------------------------------------------!
821	SUBROUTINE calc_spectra_y( ddd, m )
822
823	USE fft_xy, &
824	ONLY: fft_y_1d
825
826	USE grid_variables, &
827	ONLY: dy
828
829	USE indices, &
830	ONLY: nx, ny
831
832	USE kinds
833
834	#if defined( __parallel )
835	#if !defined( __mpifh )
836	USE MPI
837	#endif
838	#endif
839
840	USE pegrid, &
841	ONLY: comm2d, ierr, myid
842
843	USE transpose_indices, &
844	ONLY: nxl_yd, nxr_yd, nzb_yd, nzt_yd
845
846
847	IMPLICIT NONE
848
849	#if defined( __parallel )
850	#if defined( __mpifh )
851	INCLUDE "mpif.h"
852	#endif
853	#endif
854
855	INTEGER(iwp) :: i !<
856	INTEGER(iwp) :: j !<
857	INTEGER(iwp) :: k !<
858	INTEGER(iwp) :: m !<
859	INTEGER(iwp) :: n !<
860
861	REAL(wp) :: exponent !<
862	REAL(wp) :: sum_spec_dum !< wavenumber-integrated spectrum
863
864	REAL(wp), DIMENSION(0:ny) :: work !<
865
866	REAL(wp), DIMENSION(0:ny/2) :: sums_spectra_l !<
867
868	REAL(wp), DIMENSION(0:ny/2,100) :: sums_spectra !<
869
870	REAL(wp), DIMENSION(0:ny,nxl_yd:nxr_yd,nzb_yd:nzt_yd) :: ddd !<
871
872
873	!
874	!-- Exponent for geometric average
875	exponent = 1.0_wp / ( nx + 1.0_wp )
876
877	!
878	!-- Loop over all levels defined by the user
879	n = 1
880	DO WHILE ( comp_spectra_level(n) /= 999999 .AND. n <= 100 )
881
882	k = comp_spectra_level(n)
883
884	!
885	!-- Calculate FFT only if the corresponding level is situated on this PE
886	IF ( k >= nzb_yd .AND. k <= nzt_yd ) THEN
887
888	DO i = nxl_yd, nxr_yd
889
890	work = ddd(0:ny,i,k)
891	CALL fft_y_1d( work, 'forward' )
892
893	ddd(0,i,k) = dy * work(0)**2
894	DO j = 1, ny/2
895	ddd(j,i,k) = dy * ( work(j)2 + work(ny+1-j)2 )
896	ENDDO
897
898	ENDDO
899
900	!
901	!-- Local sum and geometric average of these spectra
902	!-- (WARNING: no global sum should be performed, because floating
903	!-- point overflow may occur)
904	DO j = 0, ny/2
905
906	sums_spectra_l(j) = 1.0_wp
907	DO i = nxl_yd, nxr_yd
908	sums_spectra_l(j) = sums_spectra_l(j) * ddd(j,i,k)**exponent
909	ENDDO
910
911	ENDDO
912
913	ELSE
914
915	sums_spectra_l = 1.0_wp
916
917	ENDIF
918
919	!
920	!-- Global sum of spectra on PE0 (from where they are written on file)
921	sums_spectra(:,n) = 0.0_wp
922	#if defined( __parallel )
923	CALL MPI_BARRIER( comm2d, ierr ) ! Necessary?
924	CALL MPI_REDUCE( sums_spectra_l(0), sums_spectra(0,n), ny/2+1, &
925	MPI_REAL, MPI_PROD, 0, comm2d, ierr )
926	#else
927	sums_spectra(:,n) = sums_spectra_l
928	#endif
929	!
930	!-- Normalize spectra by variance
931	sum_spec_dum = SUM( sums_spectra(1:ny/2,n) )
932	IF ( sum_spec_dum /= 0.0_wp ) THEN
933	sums_spectra(1:ny/2,n) = sums_spectra(1:ny/2,n) * &
934	var_d(k) / sum_spec_dum
935	ENDIF
936	n = n + 1
937
938	ENDDO
939	n = n - 1
940
941
942	IF ( myid == 0 ) THEN
943	!
944	!-- Sum of spectra for later averaging (see routine data_output_spectra)
945	DO j = 1, ny/2
946	DO k = 1, n
947	spectrum_y(j,k,m) = spectrum_y(j,k,m) + sums_spectra(j,k)
948	ENDDO
949	ENDDO
950
951	ENDIF
952
953	!
954	!-- n_sp_y is needed by data_output_spectra_y
955	n_sp_y = n
956
957	END SUBROUTINE calc_spectra_y
958
959	END MODULE spectra_mod

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