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source: palm/trunk/SOURCE/init_masks.f90 @ 3126

Last change on this file since 3126 was 3065, checked in by Giersch, 6 years ago
New vertical stretching procedure has been introduced
Property svn:keywords set to `Id`
File size: 31.3 KB

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1	!> @file init_masks.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: init_masks.f90 3065 2018-06-12 07:03:02Z gronemeier $
27	! dz_stretch_level was replaced by dz_stretch_level_start
28	!
29	! 3049 2018-05-29 13:52:36Z Giersch
30	! Error messages revised
31	!
32	! 3045 2018-05-28 07:55:41Z Giersch
33	! Error messages revised
34	!
35	! 2718 2018-01-02 08:49:38Z maronga
36	! Corrected "Former revisions" section
37	!
38	! 2696 2017-12-14 17:12:51Z kanani
39	! Change in file header (GPL part)
40	!
41	! 2344 2017-08-09 11:00:34Z raasch
42	! explicit setting of initial values for array domask required due to a bug
43	! in the Cray compiler (appears only if option -eD is used)
44	!
45	! 2301 2017-06-29 16:41:21Z gronemeier
46	! Bugfix: set variable name length to global value
47	!
48	!
49	! Implementation of new microphysic scheme: cloud_scheme = 'morrison'
50	! includes two more prognostic equations for cloud drop concentration (nc)
51	! and cloud water content (qc).
52	!
53	! 2271 2017-06-09 12:34:55Z sward
54	! Changed error message
55	!
56	! 2101 2017-01-05 16:42:31Z suehring
57	!
58	! 2031 2016-10-21 15:11:58Z knoop
59	! renamed variable rho to rho_ocean
60	!
61	! 2000 2016-08-20 18:09:15Z knoop
62	! Forced header and separation lines into 80 columns
63	!
64	! 1822 2016-04-07 07:49:42Z hoffmann
65	! icloud_scheme replaced by microphysics_*
66	!
67	! 1804 2016-04-05 16:30:18Z maronga
68	! Removed code for parameter file check (__check)
69	!
70	! 1783 2016-03-06 18:36:17Z raasch
71	! netcdf module name changed + related changes
72	!
73	! 1682 2015-10-07 23:56:08Z knoop
74	! Code annotations made doxygen readable
75	!
76	! 1438 2014-07-22 14:14:06Z heinze
77	! +nr, qc, qr
78	!
79	! 1414 2014-05-31 11:19:48Z gronemeier
80	! Bugfix: first and last grid points as they appear in 3D volume data can now
81	! be included to masked data output
82	!
83	! 1353 2014-04-08 15:21:23Z heinze
84	! REAL constants provided with KIND-attribute
85	!
86	! 1324 2014-03-21 09:13:16Z suehring
87	! Bugfix: ONLY statement for module netcdf_control removed
88	!
89	! 1320 2014-03-20 08:40:49Z raasch
90	! ONLY-attribute added to USE-statements,
91	! kind-parameters added to all INTEGER and REAL declaration statements,
92	! kinds are defined in new module kinds,
93	! revision history before 2012 removed,
94	! comment fields (!:) to be used for variable explanations added to
95	! all variable declaration statements
96	!
97	! 1186 2013-06-18 06:22:52Z raasch
98	! bugfix: 0.0 replaced by zu(nzb) as the lowest default height level for masks,
99	! because a zero value does not work in case of ocean runs
100	!
101	! 1036 2012-10-22 13:43:42Z raasch
102	! code put under GPL (PALM 3.9)
103	!
104	! 1032 2012-10-21 13:03:21Z letzel
105	! mask locations determined based on scalar positions
106	!
107	! 1031 2012-10-19 14:35:30Z raasch
108	! netCDF4 without parallel file support implemented
109	!
110	! 996 2012-09-07 10:41:47Z raasch
111	! little reformatting
112	!
113	! 978 2012-08-09 08:28:32Z fricke
114	! +z0h*
115	!
116	! 809 2012-01-30 13:32:58Z maronga
117	! Bugfix: replaced .AND. and .NOT. with && and ! in the preprocessor directives
118	!
119	! 807 2012-01-25 11:53:51Z maronga
120	! New cpp directive "__check" implemented which is used by check_namelist_files
121	!
122	! 410 2009-12-04 17:05:40Z letzel
123	! Initial revision
124	!
125	!
126	! Description:
127	! ------------
128	!> Initialize masked data output
129	!------------------------------------------------------------------------------!
130	SUBROUTINE init_masks
131
132	USE arrays_3d, &
133	ONLY: zu, zw
134
135	USE control_parameters, &
136	ONLY: constant_diffusion, cloud_droplets, cloud_physics, &
137	data_output_masks, data_output_masks_user, &
138	doav, doav_n, domask, domask_no, dz, dz_stretch_level_start, &
139	humidity, mask, masks, mask_scale, mask_i, &
140	mask_i_global, mask_j, mask_j_global, mask_k, mask_k_global, &
141	mask_loop, mask_size, mask_size_l, mask_start_l, mask_x, &
142	mask_x_loop, mask_xyz_dimension, mask_y, mask_y_loop, mask_z, &
143	mask_z_loop, max_masks, message_string, mid, &
144	microphysics_morrison, microphysics_seifert, passive_scalar, &
145	ocean, varnamelength
146
147
148	USE grid_variables, &
149	ONLY: dx, dy
150
151	USE indices, &
152	ONLY: nx, nxl, nxr, ny, nyn, nys, nz, nzb, nzt
153
154	USE kinds
155
156	USE netcdf_interface, &
157	ONLY: domask_unit, netcdf_data_format
158
159	USE particle_attributes, &
160	ONLY: particle_advection
161
162	USE pegrid
163
164	IMPLICIT NONE
165
166	CHARACTER (LEN=varnamelength) :: var !<
167	CHARACTER (LEN=7) :: unit !<
168
169	CHARACTER (LEN=varnamelength), DIMENSION(max_masks,100) :: do_mask !<
170	CHARACTER (LEN=varnamelength), DIMENSION(max_masks,100) :: do_mask_user !<
171
172	INTEGER(iwp) :: i !<
173	INTEGER(iwp) :: ilen !<
174	INTEGER(iwp) :: ind(6) !<
175	INTEGER(iwp) :: ind_array(1) !<
176	INTEGER(iwp) :: j !<
177	INTEGER(iwp) :: k !<
178	INTEGER(iwp) :: n !<
179	INTEGER(iwp) :: sender !<
180
181	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: tmp_array !<
182
183	LOGICAL :: found !<
184
185	!
186	!-- Initial values are explicitly set here due to a bug in the Cray compiler
187	!-- in case of assignments of initial values in declaration statements for
188	!-- arrays with more than 9999 elements (appears with -eD only)
189	domask = ' '
190
191	!
192	!-- Allocation and initialization
193	ALLOCATE( tmp_array( MAX(nx,ny,nz)+2 ) )
194
195	ALLOCATE( mask_i(max_masks,nxr-nxl+2), &
196	mask_j(max_masks,nyn-nys+2), &
197	mask_k(max_masks,nzt-nzb+2) )
198	!
199	!-- internal mask arrays ("mask,dimension,selection")
200	ALLOCATE( mask(max_masks,3,mask_xyz_dimension), &
201	mask_loop(max_masks,3,3) )
202
203	!
204	!-- Parallel mask output not yet supported. In check_parameters data format
205	!-- is restricted and is switched back to non-parallel output. Therefore the
206	!-- following error can not occur at the moment.
207	IF ( netcdf_data_format > 4 ) THEN
208	message_string = 'netCDF file formats '// &
209	'5 and 6 (with parallel I/O support)'// &
210	' are currently not supported.'
211	CALL message( 'init_masks', 'PA0328', 1, 2, 0, 6, 0 )
212	ENDIF
213
214	!
215	!-- Store data output parameters for masked data output in few shared arrays
216	DO mid = 1, masks
217
218	do_mask (mid,:) = data_output_masks(mid,:)
219	do_mask_user(mid,:) = data_output_masks_user(mid,:)
220	mask (mid,1,:) = mask_x(mid,:)
221	mask (mid,2,:) = mask_y(mid,:)
222	mask (mid,3,:) = mask_z(mid,:)
223
224	IF ( mask_x_loop(mid,1) == -1.0_wp .AND. mask_x_loop(mid,2) == -1.0_wp&
225	.AND. mask_x_loop(mid,3) == -1.0_wp ) THEN
226	mask_loop(mid,1,1:2) = -1.0_wp
227	mask_loop(mid,1,3) = 0.0_wp
228	ELSE
229	mask_loop(mid,1,:) = mask_x_loop(mid,:)
230	ENDIF
231	IF ( mask_y_loop(mid,1) == -1.0_wp .AND. mask_y_loop(mid,2) == -1.0_wp&
232	.AND. mask_y_loop(mid,3) == -1.0_wp ) THEN
233	mask_loop(mid,2,1:2) = -1.0_wp
234	mask_loop(mid,2,3) = 0.0_wp
235	ELSE
236	mask_loop(mid,2,:) = mask_y_loop(mid,:)
237	ENDIF
238	IF ( mask_z_loop(mid,1) == -1.0_wp .AND. mask_z_loop(mid,2) == -1.0_wp&
239	.AND. mask_z_loop(mid,3) == -1.0_wp ) THEN
240	mask_loop(mid,3,1:2) = -1.0_wp
241	mask_loop(mid,3,3) = 0.0_wp
242	ELSE
243	mask_loop(mid,3,:) = mask_z_loop(mid,:)
244	ENDIF
245
246	ENDDO
247
248	mask_i = -1; mask_j = -1; mask_k = -1
249
250	!
251	!-- Global arrays are required by define_netcdf_header.
252	IF ( myid == 0 .OR. netcdf_data_format > 4 ) THEN
253	ALLOCATE( mask_i_global(max_masks,nx+2), &
254	mask_j_global(max_masks,ny+2), &
255	mask_k_global(max_masks,nz+2) )
256	mask_i_global = -1; mask_j_global = -1; mask_k_global = -1
257	ENDIF
258
259	!
260	!-- Determine variable names for each mask
261	DO mid = 1, masks
262	!
263	!-- Append user-defined data output variables to the standard data output
264	IF ( do_mask_user(mid,1) /= ' ' ) THEN
265	i = 1
266	DO WHILE ( do_mask(mid,i) /= ' ' .AND. i <= 100 )
267	i = i + 1
268	ENDDO
269	j = 1
270	DO WHILE ( do_mask_user(mid,j) /= ' ' .AND. j <= 100 )
271	IF ( i > 100 ) THEN
272	WRITE ( message_string, * ) 'number of output quantitities ', &
273	'given by data_output_mask and data_output_mask_user ', &
274	'exceeds the limit of 100'
275	CALL message( 'init_masks', 'PA0329', 1, 2, 0, 6, 0 )
276	ENDIF
277	do_mask(mid,i) = do_mask_user(mid,j)
278	i = i + 1
279	j = j + 1
280	ENDDO
281	ENDIF
282
283	!
284	!-- Check and set steering parameters for mask data output and averaging
285	i = 1
286	DO WHILE ( do_mask(mid,i) /= ' ' .AND. i <= 100 )
287	!
288	!-- Check for data averaging
289	ilen = LEN_TRIM( do_mask(mid,i) )
290	j = 0 ! no data averaging
291	IF ( ilen > 3 ) THEN
292	IF ( do_mask(mid,i)(ilen-2:ilen) == '_av' ) THEN
293	j = 1 ! data averaging
294	do_mask(mid,i) = do_mask(mid,i)(1:ilen-3)
295	ENDIF
296	ENDIF
297	var = TRIM( do_mask(mid,i) )
298	!
299	!-- Check for allowed value and set units
300	SELECT CASE ( TRIM( var ) )
301
302	CASE ( 'e' )
303	IF ( constant_diffusion ) THEN
304	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
305	'" requires constant_diffusion = .FALSE.'
306	CALL message( 'init_masks', 'PA0103', 1, 2, 0, 6, 0 )
307	ENDIF
308	unit = 'm2/s2'
309
310	CASE ( 'lpt' )
311	IF ( .NOT. cloud_physics ) THEN
312	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
313	'" requires cloud_physics = .TRUE.'
314	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
315	ENDIF
316	unit = 'K'
317
318	CASE ( 'nc' )
319	IF ( .NOT. cloud_physics ) THEN
320	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
321	'" requires cloud_physics = .TRUE.'
322	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
323	ELSEIF ( .NOT. microphysics_morrison ) THEN
324	message_string = 'output of "' // TRIM( var ) // '" ' // &
325	'requires = morrison'
326	CALL message( 'check_parameters', 'PA0359', 1, 2, 0, 6, 0 )
327	ENDIF
328	unit = '1/m3'
329
330	CASE ( 'nr' )
331	IF ( .NOT. cloud_physics ) THEN
332	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
333	'" requires cloud_physics = .TRUE.'
334	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
335	ELSEIF ( .NOT. microphysics_seifert ) THEN
336	message_string = 'output of "' // TRIM( var ) // '"' // &
337	'requires cloud_scheme = seifert_beheng'
338	CALL message( 'check_parameters', 'PA0359', 1, 2, 0, 6, 0 )
339	ENDIF
340	unit = '1/m3'
341
342	CASE ( 'pc', 'pr' )
343	IF ( .NOT. particle_advection ) THEN
344	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
345	'" requires a "particles_par"-NAMELIST in the ', &
346	'parameter file (PARIN)'
347	CALL message( 'init_masks', 'PA0104', 1, 2, 0, 6, 0 )
348	ENDIF
349	IF ( TRIM( var ) == 'pc' ) unit = 'number'
350	IF ( TRIM( var ) == 'pr' ) unit = 'm'
351
352	CASE ( 'q', 'vpt' )
353	IF ( .NOT. humidity ) THEN
354	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
355	'" requires humidity = .TRUE.'
356	CALL message( 'init_masks', 'PA0105', 1, 2, 0, 6, 0 )
357	ENDIF
358	IF ( TRIM( var ) == 'q' ) unit = 'kg/kg'
359	IF ( TRIM( var ) == 'vpt' ) unit = 'K'
360
361	CASE ( 'qc' )
362	IF ( .NOT. cloud_physics ) THEN
363	message_string = 'output of "' // TRIM( var ) // '"' // &
364	'requires cloud_physics = .TRUE.'
365	CALL message( 'check_parameters', 'PA0108', 1, 2, 0, 6, 0 )
366	ENDIF
367	unit = 'kg/kg'
368
369	CASE ( 'ql' )
370	IF ( .NOT. ( cloud_physics .OR. cloud_droplets ) ) THEN
371	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
372	'" requires cloud_physics = .TRUE. or cloud_droplets', &
373	' = .TRUE.'
374	CALL message( 'init_masks', 'PA0106', 1, 2, 0, 6, 0 )
375	ENDIF
376	unit = 'kg/kg'
377
378	CASE ( 'ql_c', 'ql_v', 'ql_vp' )
379	IF ( .NOT. cloud_droplets ) THEN
380	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
381	'" requires cloud_droplets = .TRUE.'
382	CALL message( 'init_masks', 'PA0107', 1, 2, 0, 6, 0 )
383	ENDIF
384	IF ( TRIM( var ) == 'ql_c' ) unit = 'kg/kg'
385	IF ( TRIM( var ) == 'ql_v' ) unit = 'm3'
386	IF ( TRIM( var ) == 'ql_vp' ) unit = 'none'
387
388	CASE ( 'qv' )
389	IF ( .NOT. cloud_physics ) THEN
390	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
391	'" requires cloud_physics = .TRUE.'
392	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
393	ENDIF
394	unit = 'kg/kg'
395
396	CASE ( 'qr' )
397	IF ( .NOT. cloud_physics ) THEN
398	message_string = 'output of "' // TRIM( var ) // '" ' // &
399	'requires cloud_physics = .TRUE.'
400	CALL message( 'check_parameters', 'PA0108', 1, 2, 0, 6, 0 )
401	ELSEIF ( .NOT. microphysics_seifert ) THEN
402	message_string = 'output of "' // TRIM( var ) // '" ' // &
403	'requires cloud_scheme = seifert_beheng'
404	CALL message( 'check_parameters', 'PA0359', 1, 2, 0, 6, 0 )
405	ENDIF
406	unit = 'kg/kg'
407
408	CASE ( 'rho_ocean' )
409	IF ( .NOT. ocean ) THEN
410	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
411	'" requires ocean = .TRUE.'
412	CALL message( 'init_masks', 'PA0109', 1, 2, 0, 6, 0 )
413	ENDIF
414	unit = 'kg/m3'
415
416	CASE ( 's' )
417	IF ( .NOT. passive_scalar ) THEN
418	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
419	'" requires passive_scalar = .TRUE.'
420	CALL message( 'init_masks', 'PA0110', 1, 2, 0, 6, 0 )
421	ENDIF
422	unit = 'conc'
423
424	CASE ( 'sa' )
425	IF ( .NOT. ocean ) THEN
426	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
427	'" requires ocean = .TRUE.'
428	CALL message( 'init_masks', 'PA0109', 1, 2, 0, 6, 0 )
429	ENDIF
430	unit = 'psu'
431
432	CASE ( 'u', 't', 'lwp', 'pra', 'prr', 'z0', 'z0h*' )
433	WRITE ( message_string, * ) 'illegal value for data_', &
434	'output: "', TRIM( var ), '" is only allowed', &
435	'for horizontal cross section'
436	CALL message( 'init_masks', 'PA0111', 1, 2, 0, 6, 0 )
437
438	CASE ( 'p', 'pt', 'u', 'v', 'w' )
439	IF ( TRIM( var ) == 'p' ) unit = 'Pa'
440	IF ( TRIM( var ) == 'pt' ) unit = 'K'
441	IF ( TRIM( var ) == 'u' ) unit = 'm/s'
442	IF ( TRIM( var ) == 'v' ) unit = 'm/s'
443	IF ( TRIM( var ) == 'w' ) unit = 'm/s'
444	CONTINUE
445
446	CASE DEFAULT
447	CALL user_check_data_output( var, unit )
448
449	IF ( unit == 'illegal' ) THEN
450	IF ( do_mask_user(mid,1) /= ' ' ) THEN
451	WRITE ( message_string, * ) 'illegal value for data_', &
452	'output_masks or data_output_masks_user: "', &
453	TRIM( do_mask(mid,i) ), '"'
454	CALL message( 'init_masks', 'PA0018', 1, 2, 0, 6, 0 )
455	ELSE
456	WRITE ( message_string, * ) 'illegal value for data_', &
457	' output_masks : "', TRIM( do_mask(mid,i) ), '"'
458	CALL message( 'init_masks', 'PA0330', 1, 2, 0, 6, 0 )
459	ENDIF
460	ENDIF
461
462	END SELECT
463	!
464	!-- Set the internal steering parameters appropriately
465	domask_no(mid,j) = domask_no(mid,j) + 1
466	domask(mid,j,domask_no(mid,j)) = do_mask(mid,i)
467	domask_unit(mid,j,domask_no(mid,j)) = unit
468
469	IF ( j == 1 ) THEN
470	!
471	!-- Check, if variable is already subject to averaging
472	found = .FALSE.
473	DO k = 1, doav_n
474	IF ( TRIM( doav(k) ) == TRIM( var ) ) found = .TRUE.
475	ENDDO
476
477	IF ( .NOT. found ) THEN
478	doav_n = doav_n + 1
479	doav(doav_n) = var
480	ENDIF
481	ENDIF
482
483	i = i + 1
484
485	ENDDO ! do_mask(mid,i)
486	ENDDO ! mid
487
488
489	!
490	!-- Determine mask locations for each mask
491	DO mid = 1, masks
492	!
493	!-- Set local masks for each subdomain along all three dimensions
494	CALL set_mask_locations( 1, dx, 'dx', nx, 'nx', nxl, nxr )
495	CALL set_mask_locations( 2, dy, 'dy', ny, 'ny', nys, nyn )
496	CALL set_mask_locations( 3, dz(1), 'dz', nz, 'nz', nzb, nzt )
497	!
498	!-- Set global masks along all three dimensions (required by
499	!-- define_netcdf_header).
500	#if defined( __parallel )
501	!
502	!-- PE0 receives partial arrays from all processors of the respective mask
503	!-- and outputs them. Here a barrier has to be set, because otherwise
504	!-- "-MPI- FATAL: Remote protocol queue full" may occur.
505
506	CALL MPI_BARRIER( comm2d, ierr )
507
508	IF ( myid == 0 ) THEN
509	!
510	!-- Local arrays can be relocated directly.
511	mask_i_global(mid,mask_start_l(mid,1): &
512	mask_start_l(mid,1)+mask_size_l(mid,1)-1) = &
513	mask_i(mid,:mask_size_l(mid,1))
514	mask_j_global(mid,mask_start_l(mid,2): &
515	mask_start_l(mid,2)+mask_size_l(mid,2)-1) = &
516	mask_j(mid,:mask_size_l(mid,2))
517	mask_k_global(mid,mask_start_l(mid,3): &
518	mask_start_l(mid,3)+mask_size_l(mid,3)-1) = &
519	mask_k(mid,:mask_size_l(mid,3))
520	!
521	!-- Receive data from all other PEs.
522	DO n = 1, numprocs-1
523	!
524	!-- Receive index limits first, then arrays.
525	!-- Index limits are received in arbitrary order from the PEs.
526	CALL MPI_RECV( ind(1), 6, MPI_INTEGER, MPI_ANY_SOURCE, 0, &
527	comm2d, status, ierr )
528	!
529	!-- Not all PEs have data for the mask.
530	IF ( ind(1) /= -9999 ) THEN
531	sender = status(MPI_SOURCE)
532	CALL MPI_RECV( tmp_array(ind(1)), ind(2)-ind(1)+1, &
533	MPI_INTEGER, sender, 1, comm2d, status, ierr )
534	mask_i_global(mid,ind(1):ind(2)) = tmp_array(ind(1):ind(2))
535	CALL MPI_RECV( tmp_array(ind(3)), ind(4)-ind(3)+1, &
536	MPI_INTEGER, sender, 2, comm2d, status, ierr )
537	mask_j_global(mid,ind(3):ind(4)) = tmp_array(ind(3):ind(4))
538	CALL MPI_RECV( tmp_array(ind(5)), ind(6)-ind(5)+1, &
539	MPI_INTEGER, sender, 3, comm2d, status, ierr )
540	mask_k_global(mid,ind(5):ind(6)) = tmp_array(ind(5):ind(6))
541	ENDIF
542	ENDDO
543
544	ELSE
545	!
546	!-- If at least part of the mask resides on the PE, send the index limits
547	!-- for the target array, otherwise send -9999 to PE0.
548	IF ( mask_size_l(mid,1) > 0 .AND. mask_size_l(mid,2) > 0 .AND. &
549	mask_size_l(mid,3) > 0 ) THEN
550	ind(1) = mask_start_l(mid,1)
551	ind(2) = mask_start_l(mid,1) + mask_size_l(mid,1) - 1
552	ind(3) = mask_start_l(mid,2)
553	ind(4) = mask_start_l(mid,2) + mask_size_l(mid,2) - 1
554	ind(5) = mask_start_l(mid,3)
555	ind(6) = mask_start_l(mid,3) + mask_size_l(mid,3) - 1
556	ELSE
557	ind(1) = -9999; ind(2) = -9999
558	ind(3) = -9999; ind(4) = -9999
559	ind(5) = -9999; ind(6) = -9999
560	ENDIF
561	CALL MPI_SEND( ind(1), 6, MPI_INTEGER, 0, 0, comm2d, ierr )
562	!
563	!-- If applicable, send data to PE0.
564	IF ( ind(1) /= -9999 ) THEN
565	tmp_array(:mask_size_l(mid,1)) = mask_i(mid,:mask_size_l(mid,1))
566	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,1), &
567	MPI_INTEGER, 0, 1, comm2d, ierr )
568	tmp_array(:mask_size_l(mid,2)) = mask_j(mid,:mask_size_l(mid,2))
569	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,2), &
570	MPI_INTEGER, 0, 2, comm2d, ierr )
571	tmp_array(:mask_size_l(mid,3)) = mask_k(mid,:mask_size_l(mid,3))
572	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,3), &
573	MPI_INTEGER, 0, 3, comm2d, ierr )
574	ENDIF
575	ENDIF
576	!
577	!-- A barrier has to be set, because otherwise some PEs may proceed too fast
578	!-- so that PE0 may receive wrong data on tag 0.
579	CALL MPI_BARRIER( comm2d, ierr )
580
581	IF ( netcdf_data_format > 4 ) THEN
582
583	CALL MPI_BCAST( mask_i_global(mid,:), nx+2, MPI_INTEGER, 0, comm2d, &
584	ierr )
585	CALL MPI_BCAST( mask_j_global(mid,:), ny+2, MPI_INTEGER, 0, comm2d, &
586	ierr )
587	CALL MPI_BCAST( mask_k_global(mid,:), nz+2, MPI_INTEGER, 0, comm2d, &
588	ierr )
589
590	ENDIF
591
592	#else
593	!
594	!-- Local arrays can be relocated directly.
595	mask_i_global(mid,:) = mask_i(mid,:)
596	mask_j_global(mid,:) = mask_j(mid,:)
597	mask_k_global(mid,:) = mask_k(mid,:)
598	#endif
599	ENDDO ! mid
600
601	DEALLOCATE( tmp_array )
602	!
603	!-- Internal mask arrays cannot be deallocated on PE 0 because they are
604	!-- required for header output on PE 0.
605	IF ( myid /= 0 ) DEALLOCATE( mask, mask_loop )
606
607	CONTAINS
608
609	!------------------------------------------------------------------------------!
610	! Description:
611	! ------------
612	!> Set local mask for each subdomain along 'dim' direction.
613	!------------------------------------------------------------------------------!
614	SUBROUTINE set_mask_locations( dim, dxyz, dxyz_string, nxyz, nxyz_string, &
615	lb, ub )
616
617	IMPLICIT NONE
618
619	CHARACTER (LEN=2) :: dxyz_string !<
620	CHARACTER (LEN=2) :: nxyz_string !<
621
622	INTEGER(iwp) :: count !<
623	INTEGER(iwp) :: count_l !<
624	INTEGER(iwp) :: dim !<
625	INTEGER(iwp) :: m !<
626	INTEGER(iwp) :: loop_begin !<
627	INTEGER(iwp) :: loop_end !<
628	INTEGER(iwp) :: loop_stride !<
629	INTEGER(iwp) :: lb !<
630	INTEGER(iwp) :: nxyz !<
631	INTEGER(iwp) :: ub !<
632
633	REAL(wp) :: dxyz !<
634	REAL(wp) :: ddxyz !<
635	REAL(wp) :: tmp1 !<
636	REAL(wp) :: tmp2 !<
637
638	count = 0; count_l = 0
639	ddxyz = 1.0_wp / dxyz
640	tmp1 = 0.0_wp
641	tmp2 = 0.0_wp
642
643	IF ( mask(mid,dim,1) >= 0.0_wp ) THEN
644	!
645	!-- use predefined mask_* array
646	DO WHILE ( mask(mid,dim,count+1) >= 0.0_wp )
647	count = count + 1
648	IF ( dim == 1 .OR. dim == 2 ) THEN
649	m = NINT( mask(mid,dim,count) * mask_scale(dim) * ddxyz - 0.5_wp )
650	IF ( m < 0 ) m = 0 ! avoid negative values
651	ELSEIF ( dim == 3 ) THEN
652	ind_array = &
653	MINLOC( ABS( mask(mid,dim,count) * mask_scale(dim) - zu ) )
654	m = ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
655	ENDIF
656	IF ( m > (nxyz+1) ) THEN
657	WRITE ( message_string, '(I3,A,I3,A,I1,3A,I3)' ) &
658	m,' in mask ',mid,' along dimension ',dim, &
659	' exceeds (',nxyz_string,'+1) = ',nxyz+1
660	CALL message( 'init_masks', 'PA0331', 1, 2, 0, 6, 0 )
661	ENDIF
662	IF ( ( m >= lb .AND. m <= ub ) .OR. &
663	( m == (nxyz+1) .AND. ub == nxyz ) ) THEN
664	IF ( count_l == 0 ) mask_start_l(mid,dim) = count
665	count_l = count_l + 1
666	IF ( dim == 1 ) THEN
667	mask_i(mid,count_l) = m
668	ELSEIF ( dim == 2 ) THEN
669	mask_j(mid,count_l) = m
670	ELSEIF ( dim == 3 ) THEN
671	mask_k(mid,count_l) = m
672	ENDIF
673	ENDIF
674	IF ( count == mask_xyz_dimension ) EXIT
675	ENDDO
676	mask_size(mid,dim) = count
677	mask_size_l(mid,dim) = count_l
678
679	ELSE
680	!
681	!-- use predefined mask_loop_* array, or use the default (all grid points
682	!-- along this direction)
683	IF ( mask_loop(mid,dim,1) < 0.0_wp ) THEN
684	tmp1 = mask_loop(mid,dim,1)
685	mask_loop(mid,dim,1) = zw(nzb) ! lowest level (default)
686	ENDIF
687	IF ( dim == 1 .OR. dim == 2 ) THEN
688	IF ( mask_loop(mid,dim,2) < 0.0_wp ) THEN
689	tmp2 = mask_loop(mid,dim,2)
690	mask_loop(mid,dim,2) = (nxyz+1)*dxyz / mask_scale(dim) ! (default)
691	ENDIF
692	IF ( MAXVAL( mask_loop(mid,dim,1:2) ) &
693	> (nxyz+1) * dxyz / mask_scale(dim) ) THEN
694	WRITE ( message_string, '(2(A,I3,A,I1,A,F9.3),5A,I1,A,F9.3)' ) &
695	'mask_loop(',mid,',',dim,',1)=',mask_loop(mid,dim,1), &
696	' and/or mask_loop(',mid,',',dim,',2)=', &
697	mask_loop(mid,dim,2),' exceed (', &
698	nxyz_string,'+1)*',dxyz_string,'/mask_scale(',dim,')=', &
699	(nxyz+1)*dxyz/mask_scale(dim)
700	CALL message( 'init_masks', 'PA0332', 1, 2, 0, 6, 0 )
701	ENDIF
702	loop_begin = NINT( mask_loop(mid,dim,1) * mask_scale(dim) &
703	* ddxyz - 0.5_wp )
704	loop_end = NINT( mask_loop(mid,dim,2) * mask_scale(dim) &
705	* ddxyz - 0.5_wp )
706	loop_stride = NINT( mask_loop(mid,dim,3) * mask_scale(dim) &
707	* ddxyz )
708	IF ( loop_begin == -1 ) loop_begin = 0 ! avoid negative values
709	ELSEIF ( dim == 3 ) THEN
710	IF ( mask_loop(mid,dim,2) < 0.0_wp ) THEN
711	tmp2 = mask_loop(mid,dim,2)
712	mask_loop(mid,dim,2) = zu(nz+1) / mask_scale(dim) ! (default)
713	ENDIF
714	IF ( MAXVAL( mask_loop(mid,dim,1:2) ) &
715	> zu(nz+1) / mask_scale(dim) ) THEN
716	WRITE ( message_string, '(2(A,I3,A,I1,A,F9.3),A,I1,A,F9.3)' ) &
717	'mask_loop(',mid,',',dim,',1)=',mask_loop(mid,dim,1), &
718	' and/or mask_loop(',mid,',',dim,',2)=', &
719	mask_loop(mid,dim,2),' exceed zu(nz+1)/mask_scale(',dim, &
720	')=',zu(nz+1)/mask_scale(dim)
721	CALL message( 'init_masks', 'PA0333', 1, 2, 0, 6, 0 )
722	ENDIF
723	ind_array = &
724	MINLOC( ABS( mask_loop(mid,dim,1) * mask_scale(dim) - zu ) )
725	loop_begin = &
726	ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
727	ind_array = &
728	MINLOC( ABS( mask_loop(mid,dim,2) * mask_scale(dim) - zu ) )
729	loop_end = ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
730	!
731	!-- The following line assumes a constant vertical grid spacing within
732	!-- the vertical mask range; it fails for vertical grid stretching.
733	!-- Maybe revise later. Issue warning but continue execution. ABS(...)
734	!-- within the IF statement is necessary because the default value of
735	!-- dz_stretch_level_start is -9999999.9_wp.
736	loop_stride = NINT( mask_loop(mid,dim,3) * mask_scale(dim) * ddxyz )
737
738	IF ( mask_loop(mid,dim,2) * mask_scale(dim) > &
739	ABS( dz_stretch_level_start(1) ) ) THEN
740	WRITE ( message_string, '(A,I3,A,I1,A,F9.3,A,F8.2,3A)' ) &
741	'mask_loop(',mid,',',dim,',2)=', mask_loop(mid,dim,2), &
742	' exceeds dz_stretch_level=',dz_stretch_level_start(1), &
743	'.&Vertical mask locations will not ', &
744	'match the desired heights within the stretching ', &
745	'region.'
746	CALL message( 'init_masks', 'PA0334', 0, 1, 0, 6, 0 )
747	ENDIF
748
749	ENDIF
750	!
751	!-- If necessary, reset mask_loop(mid,dim,1) and mask_loop(mid,dim,2).
752	IF ( tmp1 < 0.0_wp ) mask_loop(mid,dim,1) = tmp1
753	IF ( tmp2 < 0.0_wp ) mask_loop(mid,dim,2) = tmp2
754	!
755	!-- The default stride +/-1 (every grid point) applies if
756	!-- mask_loop(mid,dim,3) is not specified (its default is zero).
757	IF ( loop_stride == 0 ) THEN
758	IF ( loop_end >= loop_begin ) THEN
759	loop_stride = 1
760	ELSE
761	loop_stride = -1
762	ENDIF
763	ENDIF
764	DO m = loop_begin, loop_end, loop_stride
765	count = count + 1
766	IF ( ( m >= lb .AND. m <= ub ) .OR. &
767	( m == (nxyz+1) .AND. ub == nxyz ) ) THEN
768	IF ( count_l == 0 ) mask_start_l(mid,dim) = count
769	count_l = count_l + 1
770	IF ( dim == 1 ) THEN
771	mask_i(mid,count_l) = m
772	ELSEIF ( dim == 2 ) THEN
773	mask_j(mid,count_l) = m
774	ELSEIF ( dim == 3 ) THEN
775	mask_k(mid,count_l) = m
776	ENDIF
777	ENDIF
778	ENDDO
779	mask_size(mid,dim) = count
780	mask_size_l(mid,dim) = count_l
781
782	ENDIF
783
784	END SUBROUTINE set_mask_locations
785
786	END SUBROUTINE init_masks

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