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source: palm/trunk/SOURCE/init_masks.f90 @ 3274

Last change on this file since 3274 was 3274, checked in by knoop, 6 years ago
Modularization of all bulk cloud physics code components
Property svn:keywords set to `Id`
File size: 31.6 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 3274 2018-09-24 15:42:55Z knoop $
27	! Modularization of all bulk cloud physics code components
28	!
29	! 3065 2018-06-12 07:03:02Z Giersch
30	! dz_stretch_level was replaced by dz_stretch_level_start
31	!
32	! 3049 2018-05-29 13:52:36Z Giersch
33	! Error messages revised
34	!
35	! 3045 2018-05-28 07:55:41Z Giersch
36	! Error messages revised
37	!
38	! 2718 2018-01-02 08:49:38Z maronga
39	! Corrected "Former revisions" section
40	!
41	! 2696 2017-12-14 17:12:51Z kanani
42	! Change in file header (GPL part)
43	!
44	! 2344 2017-08-09 11:00:34Z raasch
45	! explicit setting of initial values for array domask required due to a bug
46	! in the Cray compiler (appears only if option -eD is used)
47	!
48	! 2301 2017-06-29 16:41:21Z gronemeier
49	! Bugfix: set variable name length to global value
50	!
51	!
52	! Implementation of new microphysic scheme: cloud_scheme = 'morrison'
53	! includes two more prognostic equations for cloud drop concentration (nc)
54	! and cloud water content (qc).
55	!
56	! 2271 2017-06-09 12:34:55Z sward
57	! Changed error message
58	!
59	! 2101 2017-01-05 16:42:31Z suehring
60	!
61	! 2031 2016-10-21 15:11:58Z knoop
62	! renamed variable rho to rho_ocean
63	!
64	! 2000 2016-08-20 18:09:15Z knoop
65	! Forced header and separation lines into 80 columns
66	!
67	! 1822 2016-04-07 07:49:42Z hoffmann
68	! icloud_scheme replaced by microphysics_*
69	!
70	! 1804 2016-04-05 16:30:18Z maronga
71	! Removed code for parameter file check (__check)
72	!
73	! 1783 2016-03-06 18:36:17Z raasch
74	! netcdf module name changed + related changes
75	!
76	! 1682 2015-10-07 23:56:08Z knoop
77	! Code annotations made doxygen readable
78	!
79	! 1438 2014-07-22 14:14:06Z heinze
80	! +nr, qc, qr
81	!
82	! 1414 2014-05-31 11:19:48Z gronemeier
83	! Bugfix: first and last grid points as they appear in 3D volume data can now
84	! be included to masked data output
85	!
86	! 1353 2014-04-08 15:21:23Z heinze
87	! REAL constants provided with KIND-attribute
88	!
89	! 1324 2014-03-21 09:13:16Z suehring
90	! Bugfix: ONLY statement for module netcdf_control removed
91	!
92	! 1320 2014-03-20 08:40:49Z raasch
93	! ONLY-attribute added to USE-statements,
94	! kind-parameters added to all INTEGER and REAL declaration statements,
95	! kinds are defined in new module kinds,
96	! revision history before 2012 removed,
97	! comment fields (!:) to be used for variable explanations added to
98	! all variable declaration statements
99	!
100	! 1186 2013-06-18 06:22:52Z raasch
101	! bugfix: 0.0 replaced by zu(nzb) as the lowest default height level for masks,
102	! because a zero value does not work in case of ocean runs
103	!
104	! 1036 2012-10-22 13:43:42Z raasch
105	! code put under GPL (PALM 3.9)
106	!
107	! 1032 2012-10-21 13:03:21Z letzel
108	! mask locations determined based on scalar positions
109	!
110	! 1031 2012-10-19 14:35:30Z raasch
111	! netCDF4 without parallel file support implemented
112	!
113	! 996 2012-09-07 10:41:47Z raasch
114	! little reformatting
115	!
116	! 978 2012-08-09 08:28:32Z fricke
117	! +z0h*
118	!
119	! 809 2012-01-30 13:32:58Z maronga
120	! Bugfix: replaced .AND. and .NOT. with && and ! in the preprocessor directives
121	!
122	! 807 2012-01-25 11:53:51Z maronga
123	! New cpp directive "__check" implemented which is used by check_namelist_files
124	!
125	! 410 2009-12-04 17:05:40Z letzel
126	! Initial revision
127	!
128	!
129	! Description:
130	! ------------
131	!> Initialize masked data output
132	!------------------------------------------------------------------------------!
133	SUBROUTINE init_masks
134
135	USE arrays_3d, &
136	ONLY: zu, zw
137
138	USE control_parameters, &
139	ONLY: constant_diffusion, cloud_droplets, &
140	data_output_masks, data_output_masks_user, &
141	doav, doav_n, domask, domask_no, dz, dz_stretch_level_start, &
142	humidity, mask, masks, mask_scale, mask_i, &
143	mask_i_global, mask_j, mask_j_global, mask_k, mask_k_global, &
144	mask_loop, mask_size, mask_size_l, mask_start_l, mask_x, &
145	mask_x_loop, mask_xyz_dimension, mask_y, mask_y_loop, mask_z, &
146	mask_z_loop, max_masks, message_string, mid, &
147	passive_scalar, ocean, varnamelength
148
149
150	USE grid_variables, &
151	ONLY: dx, dy
152
153	USE indices, &
154	ONLY: nx, nxl, nxr, ny, nyn, nys, nz, nzb, nzt
155
156	USE kinds
157
158	USE bulk_cloud_model_mod, &
159	ONLY: bulk_cloud_model, microphysics_morrison, microphysics_seifert
160
161	USE netcdf_interface, &
162	ONLY: domask_unit, netcdf_data_format
163
164	USE particle_attributes, &
165	ONLY: particle_advection
166
167	USE pegrid
168
169	IMPLICIT NONE
170
171	CHARACTER (LEN=varnamelength) :: var !<
172	CHARACTER (LEN=7) :: unit !<
173
174	CHARACTER (LEN=varnamelength), DIMENSION(max_masks,100) :: do_mask !<
175	CHARACTER (LEN=varnamelength), DIMENSION(max_masks,100) :: do_mask_user !<
176
177	INTEGER(iwp) :: i !<
178	INTEGER(iwp) :: ilen !<
179	INTEGER(iwp) :: ind(6) !<
180	INTEGER(iwp) :: ind_array(1) !<
181	INTEGER(iwp) :: j !<
182	INTEGER(iwp) :: k !<
183	INTEGER(iwp) :: n !<
184	INTEGER(iwp) :: sender !<
185
186	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: tmp_array !<
187
188	LOGICAL :: found !<
189
190	!
191	!-- Initial values are explicitly set here due to a bug in the Cray compiler
192	!-- in case of assignments of initial values in declaration statements for
193	!-- arrays with more than 9999 elements (appears with -eD only)
194	domask = ' '
195
196	!
197	!-- Allocation and initialization
198	ALLOCATE( tmp_array( MAX(nx,ny,nz)+2 ) )
199
200	ALLOCATE( mask_i(max_masks,nxr-nxl+2), &
201	mask_j(max_masks,nyn-nys+2), &
202	mask_k(max_masks,nzt-nzb+2) )
203	!
204	!-- internal mask arrays ("mask,dimension,selection")
205	ALLOCATE( mask(max_masks,3,mask_xyz_dimension), &
206	mask_loop(max_masks,3,3) )
207
208	!
209	!-- Parallel mask output not yet supported. In check_parameters data format
210	!-- is restricted and is switched back to non-parallel output. Therefore the
211	!-- following error can not occur at the moment.
212	IF ( netcdf_data_format > 4 ) THEN
213	message_string = 'netCDF file formats '// &
214	'5 and 6 (with parallel I/O support)'// &
215	' are currently not supported.'
216	CALL message( 'init_masks', 'PA0328', 1, 2, 0, 6, 0 )
217	ENDIF
218
219	!
220	!-- Store data output parameters for masked data output in few shared arrays
221	DO mid = 1, masks
222
223	do_mask (mid,:) = data_output_masks(mid,:)
224	do_mask_user(mid,:) = data_output_masks_user(mid,:)
225	mask (mid,1,:) = mask_x(mid,:)
226	mask (mid,2,:) = mask_y(mid,:)
227	mask (mid,3,:) = mask_z(mid,:)
228
229	IF ( mask_x_loop(mid,1) == -1.0_wp .AND. mask_x_loop(mid,2) == -1.0_wp&
230	.AND. mask_x_loop(mid,3) == -1.0_wp ) THEN
231	mask_loop(mid,1,1:2) = -1.0_wp
232	mask_loop(mid,1,3) = 0.0_wp
233	ELSE
234	mask_loop(mid,1,:) = mask_x_loop(mid,:)
235	ENDIF
236	IF ( mask_y_loop(mid,1) == -1.0_wp .AND. mask_y_loop(mid,2) == -1.0_wp&
237	.AND. mask_y_loop(mid,3) == -1.0_wp ) THEN
238	mask_loop(mid,2,1:2) = -1.0_wp
239	mask_loop(mid,2,3) = 0.0_wp
240	ELSE
241	mask_loop(mid,2,:) = mask_y_loop(mid,:)
242	ENDIF
243	IF ( mask_z_loop(mid,1) == -1.0_wp .AND. mask_z_loop(mid,2) == -1.0_wp&
244	.AND. mask_z_loop(mid,3) == -1.0_wp ) THEN
245	mask_loop(mid,3,1:2) = -1.0_wp
246	mask_loop(mid,3,3) = 0.0_wp
247	ELSE
248	mask_loop(mid,3,:) = mask_z_loop(mid,:)
249	ENDIF
250
251	ENDDO
252
253	mask_i = -1; mask_j = -1; mask_k = -1
254
255	!
256	!-- Global arrays are required by define_netcdf_header.
257	IF ( myid == 0 .OR. netcdf_data_format > 4 ) THEN
258	ALLOCATE( mask_i_global(max_masks,nx+2), &
259	mask_j_global(max_masks,ny+2), &
260	mask_k_global(max_masks,nz+2) )
261	mask_i_global = -1; mask_j_global = -1; mask_k_global = -1
262	ENDIF
263
264	!
265	!-- Determine variable names for each mask
266	DO mid = 1, masks
267	!
268	!-- Append user-defined data output variables to the standard data output
269	IF ( do_mask_user(mid,1) /= ' ' ) THEN
270	i = 1
271	DO WHILE ( do_mask(mid,i) /= ' ' .AND. i <= 100 )
272	i = i + 1
273	ENDDO
274	j = 1
275	DO WHILE ( do_mask_user(mid,j) /= ' ' .AND. j <= 100 )
276	IF ( i > 100 ) THEN
277	WRITE ( message_string, * ) 'number of output quantitities ', &
278	'given by data_output_mask and data_output_mask_user ', &
279	'exceeds the limit of 100'
280	CALL message( 'init_masks', 'PA0329', 1, 2, 0, 6, 0 )
281	ENDIF
282	do_mask(mid,i) = do_mask_user(mid,j)
283	i = i + 1
284	j = j + 1
285	ENDDO
286	ENDIF
287
288	!
289	!-- Check and set steering parameters for mask data output and averaging
290	i = 1
291	DO WHILE ( do_mask(mid,i) /= ' ' .AND. i <= 100 )
292	!
293	!-- Check for data averaging
294	ilen = LEN_TRIM( do_mask(mid,i) )
295	j = 0 ! no data averaging
296	IF ( ilen > 3 ) THEN
297	IF ( do_mask(mid,i)(ilen-2:ilen) == '_av' ) THEN
298	j = 1 ! data averaging
299	do_mask(mid,i) = do_mask(mid,i)(1:ilen-3)
300	ENDIF
301	ENDIF
302	var = TRIM( do_mask(mid,i) )
303	!
304	!-- Check for allowed value and set units
305	SELECT CASE ( TRIM( var ) )
306
307	CASE ( 'e' )
308	IF ( constant_diffusion ) THEN
309	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
310	'" requires constant_diffusion = .FALSE.'
311	CALL message( 'init_masks', 'PA0103', 1, 2, 0, 6, 0 )
312	ENDIF
313	unit = 'm2/s2'
314
315	CASE ( 'lpt' )
316	IF ( .NOT. bulk_cloud_model ) THEN
317	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
318	'" requires bulk_cloud_model = .TRUE.'
319	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
320	ENDIF
321	unit = 'K'
322
323	CASE ( 'nc' )
324	IF ( .NOT. bulk_cloud_model ) THEN
325	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
326	'" requires bulk_cloud_model = .TRUE.'
327	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
328	ELSEIF ( .NOT. microphysics_morrison ) THEN
329	message_string = 'output of "' // TRIM( var ) // '" ' // &
330	'requires = morrison'
331	CALL message( 'check_parameters', 'PA0359', 1, 2, 0, 6, 0 )
332	ENDIF
333	unit = '1/m3'
334
335	CASE ( 'nr' )
336	IF ( .NOT. bulk_cloud_model ) THEN
337	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
338	'" requires bulk_cloud_model = .TRUE.'
339	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
340	ELSEIF ( .NOT. microphysics_seifert ) THEN
341	message_string = 'output of "' // TRIM( var ) // '"' // &
342	'requires cloud_scheme = seifert_beheng'
343	CALL message( 'check_parameters', 'PA0359', 1, 2, 0, 6, 0 )
344	ENDIF
345	unit = '1/m3'
346
347	CASE ( 'pc', 'pr' )
348	IF ( .NOT. particle_advection ) THEN
349	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
350	'" requires a "particles_par"-NAMELIST in the ', &
351	'parameter file (PARIN)'
352	CALL message( 'init_masks', 'PA0104', 1, 2, 0, 6, 0 )
353	ENDIF
354	IF ( TRIM( var ) == 'pc' ) unit = 'number'
355	IF ( TRIM( var ) == 'pr' ) unit = 'm'
356
357	CASE ( 'q', 'vpt' )
358	IF ( .NOT. humidity ) THEN
359	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
360	'" requires humidity = .TRUE.'
361	CALL message( 'init_masks', 'PA0105', 1, 2, 0, 6, 0 )
362	ENDIF
363	IF ( TRIM( var ) == 'q' ) unit = 'kg/kg'
364	IF ( TRIM( var ) == 'vpt' ) unit = 'K'
365
366	CASE ( 'qc' )
367	IF ( .NOT. bulk_cloud_model ) THEN
368	message_string = 'output of "' // TRIM( var ) // '"' // &
369	'requires bulk_cloud_model = .TRUE.'
370	CALL message( 'check_parameters', 'PA0108', 1, 2, 0, 6, 0 )
371	ENDIF
372	unit = 'kg/kg'
373
374	CASE ( 'ql' )
375	IF ( .NOT. ( bulk_cloud_model .OR. cloud_droplets ) ) THEN
376	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
377	'" requires bulk_cloud_model = .TRUE. or ', &
378	'cloud_droplets = .TRUE.'
379	CALL message( 'init_masks', 'PA0106', 1, 2, 0, 6, 0 )
380	ENDIF
381	unit = 'kg/kg'
382
383	CASE ( 'ql_c', 'ql_v', 'ql_vp' )
384	IF ( .NOT. cloud_droplets ) THEN
385	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
386	'" requires cloud_droplets = .TRUE.'
387	CALL message( 'init_masks', 'PA0107', 1, 2, 0, 6, 0 )
388	ENDIF
389	IF ( TRIM( var ) == 'ql_c' ) unit = 'kg/kg'
390	IF ( TRIM( var ) == 'ql_v' ) unit = 'm3'
391	IF ( TRIM( var ) == 'ql_vp' ) unit = 'none'
392
393	CASE ( 'qv' )
394	IF ( .NOT. bulk_cloud_model ) THEN
395	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
396	'" requires bulk_cloud_model = .TRUE.'
397	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
398	ENDIF
399	unit = 'kg/kg'
400
401	CASE ( 'qr' )
402	IF ( .NOT. bulk_cloud_model ) THEN
403	message_string = 'output of "' // TRIM( var ) // '" ' // &
404	'requires bulk_cloud_model = .TRUE.'
405	CALL message( 'check_parameters', 'PA0108', 1, 2, 0, 6, 0 )
406	ELSEIF ( .NOT. microphysics_seifert ) THEN
407	message_string = 'output of "' // TRIM( var ) // '" ' // &
408	'requires cloud_scheme = seifert_beheng'
409	CALL message( 'check_parameters', 'PA0359', 1, 2, 0, 6, 0 )
410	ENDIF
411	unit = 'kg/kg'
412
413	CASE ( 'rho_ocean' )
414	IF ( .NOT. ocean ) THEN
415	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
416	'" requires ocean = .TRUE.'
417	CALL message( 'init_masks', 'PA0109', 1, 2, 0, 6, 0 )
418	ENDIF
419	unit = 'kg/m3'
420
421	CASE ( 's' )
422	IF ( .NOT. passive_scalar ) THEN
423	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
424	'" requires passive_scalar = .TRUE.'
425	CALL message( 'init_masks', 'PA0110', 1, 2, 0, 6, 0 )
426	ENDIF
427	unit = 'conc'
428
429	CASE ( 'sa' )
430	IF ( .NOT. ocean ) THEN
431	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
432	'" requires ocean = .TRUE.'
433	CALL message( 'init_masks', 'PA0109', 1, 2, 0, 6, 0 )
434	ENDIF
435	unit = 'psu'
436
437	CASE ( 'u', 't', 'lwp', 'pra', 'prr', 'z0', 'z0h*' )
438	WRITE ( message_string, * ) 'illegal value for data_', &
439	'output: "', TRIM( var ), '" is only allowed', &
440	'for horizontal cross section'
441	CALL message( 'init_masks', 'PA0111', 1, 2, 0, 6, 0 )
442
443	CASE ( 'p', 'pt', 'u', 'v', 'w' )
444	IF ( TRIM( var ) == 'p' ) unit = 'Pa'
445	IF ( TRIM( var ) == 'pt' ) unit = 'K'
446	IF ( TRIM( var ) == 'u' ) unit = 'm/s'
447	IF ( TRIM( var ) == 'v' ) unit = 'm/s'
448	IF ( TRIM( var ) == 'w' ) unit = 'm/s'
449	CONTINUE
450
451	CASE DEFAULT
452	CALL user_check_data_output( var, unit )
453
454	IF ( unit == 'illegal' ) THEN
455	IF ( do_mask_user(mid,1) /= ' ' ) THEN
456	WRITE ( message_string, * ) 'illegal value for data_', &
457	'output_masks or data_output_masks_user: "', &
458	TRIM( do_mask(mid,i) ), '"'
459	CALL message( 'init_masks', 'PA0018', 1, 2, 0, 6, 0 )
460	ELSE
461	WRITE ( message_string, * ) 'illegal value for data_', &
462	' output_masks : "', TRIM( do_mask(mid,i) ), '"'
463	CALL message( 'init_masks', 'PA0330', 1, 2, 0, 6, 0 )
464	ENDIF
465	ENDIF
466
467	END SELECT
468	!
469	!-- Set the internal steering parameters appropriately
470	domask_no(mid,j) = domask_no(mid,j) + 1
471	domask(mid,j,domask_no(mid,j)) = do_mask(mid,i)
472	domask_unit(mid,j,domask_no(mid,j)) = unit
473
474	IF ( j == 1 ) THEN
475	!
476	!-- Check, if variable is already subject to averaging
477	found = .FALSE.
478	DO k = 1, doav_n
479	IF ( TRIM( doav(k) ) == TRIM( var ) ) found = .TRUE.
480	ENDDO
481
482	IF ( .NOT. found ) THEN
483	doav_n = doav_n + 1
484	doav(doav_n) = var
485	ENDIF
486	ENDIF
487
488	i = i + 1
489
490	ENDDO ! do_mask(mid,i)
491	ENDDO ! mid
492
493
494	!
495	!-- Determine mask locations for each mask
496	DO mid = 1, masks
497	!
498	!-- Set local masks for each subdomain along all three dimensions
499	CALL set_mask_locations( 1, dx, 'dx', nx, 'nx', nxl, nxr )
500	CALL set_mask_locations( 2, dy, 'dy', ny, 'ny', nys, nyn )
501	CALL set_mask_locations( 3, dz(1), 'dz', nz, 'nz', nzb, nzt )
502	!
503	!-- Set global masks along all three dimensions (required by
504	!-- define_netcdf_header).
505	#if defined( __parallel )
506	!
507	!-- PE0 receives partial arrays from all processors of the respective mask
508	!-- and outputs them. Here a barrier has to be set, because otherwise
509	!-- "-MPI- FATAL: Remote protocol queue full" may occur.
510
511	CALL MPI_BARRIER( comm2d, ierr )
512
513	IF ( myid == 0 ) THEN
514	!
515	!-- Local arrays can be relocated directly.
516	mask_i_global(mid,mask_start_l(mid,1): &
517	mask_start_l(mid,1)+mask_size_l(mid,1)-1) = &
518	mask_i(mid,:mask_size_l(mid,1))
519	mask_j_global(mid,mask_start_l(mid,2): &
520	mask_start_l(mid,2)+mask_size_l(mid,2)-1) = &
521	mask_j(mid,:mask_size_l(mid,2))
522	mask_k_global(mid,mask_start_l(mid,3): &
523	mask_start_l(mid,3)+mask_size_l(mid,3)-1) = &
524	mask_k(mid,:mask_size_l(mid,3))
525	!
526	!-- Receive data from all other PEs.
527	DO n = 1, numprocs-1
528	!
529	!-- Receive index limits first, then arrays.
530	!-- Index limits are received in arbitrary order from the PEs.
531	CALL MPI_RECV( ind(1), 6, MPI_INTEGER, MPI_ANY_SOURCE, 0, &
532	comm2d, status, ierr )
533	!
534	!-- Not all PEs have data for the mask.
535	IF ( ind(1) /= -9999 ) THEN
536	sender = status(MPI_SOURCE)
537	CALL MPI_RECV( tmp_array(ind(1)), ind(2)-ind(1)+1, &
538	MPI_INTEGER, sender, 1, comm2d, status, ierr )
539	mask_i_global(mid,ind(1):ind(2)) = tmp_array(ind(1):ind(2))
540	CALL MPI_RECV( tmp_array(ind(3)), ind(4)-ind(3)+1, &
541	MPI_INTEGER, sender, 2, comm2d, status, ierr )
542	mask_j_global(mid,ind(3):ind(4)) = tmp_array(ind(3):ind(4))
543	CALL MPI_RECV( tmp_array(ind(5)), ind(6)-ind(5)+1, &
544	MPI_INTEGER, sender, 3, comm2d, status, ierr )
545	mask_k_global(mid,ind(5):ind(6)) = tmp_array(ind(5):ind(6))
546	ENDIF
547	ENDDO
548
549	ELSE
550	!
551	!-- If at least part of the mask resides on the PE, send the index limits
552	!-- for the target array, otherwise send -9999 to PE0.
553	IF ( mask_size_l(mid,1) > 0 .AND. mask_size_l(mid,2) > 0 .AND. &
554	mask_size_l(mid,3) > 0 ) THEN
555	ind(1) = mask_start_l(mid,1)
556	ind(2) = mask_start_l(mid,1) + mask_size_l(mid,1) - 1
557	ind(3) = mask_start_l(mid,2)
558	ind(4) = mask_start_l(mid,2) + mask_size_l(mid,2) - 1
559	ind(5) = mask_start_l(mid,3)
560	ind(6) = mask_start_l(mid,3) + mask_size_l(mid,3) - 1
561	ELSE
562	ind(1) = -9999; ind(2) = -9999
563	ind(3) = -9999; ind(4) = -9999
564	ind(5) = -9999; ind(6) = -9999
565	ENDIF
566	CALL MPI_SEND( ind(1), 6, MPI_INTEGER, 0, 0, comm2d, ierr )
567	!
568	!-- If applicable, send data to PE0.
569	IF ( ind(1) /= -9999 ) THEN
570	tmp_array(:mask_size_l(mid,1)) = mask_i(mid,:mask_size_l(mid,1))
571	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,1), &
572	MPI_INTEGER, 0, 1, comm2d, ierr )
573	tmp_array(:mask_size_l(mid,2)) = mask_j(mid,:mask_size_l(mid,2))
574	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,2), &
575	MPI_INTEGER, 0, 2, comm2d, ierr )
576	tmp_array(:mask_size_l(mid,3)) = mask_k(mid,:mask_size_l(mid,3))
577	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,3), &
578	MPI_INTEGER, 0, 3, comm2d, ierr )
579	ENDIF
580	ENDIF
581	!
582	!-- A barrier has to be set, because otherwise some PEs may proceed too fast
583	!-- so that PE0 may receive wrong data on tag 0.
584	CALL MPI_BARRIER( comm2d, ierr )
585
586	IF ( netcdf_data_format > 4 ) THEN
587
588	CALL MPI_BCAST( mask_i_global(mid,:), nx+2, MPI_INTEGER, 0, comm2d, &
589	ierr )
590	CALL MPI_BCAST( mask_j_global(mid,:), ny+2, MPI_INTEGER, 0, comm2d, &
591	ierr )
592	CALL MPI_BCAST( mask_k_global(mid,:), nz+2, MPI_INTEGER, 0, comm2d, &
593	ierr )
594
595	ENDIF
596
597	#else
598	!
599	!-- Local arrays can be relocated directly.
600	mask_i_global(mid,:) = mask_i(mid,:)
601	mask_j_global(mid,:) = mask_j(mid,:)
602	mask_k_global(mid,:) = mask_k(mid,:)
603	#endif
604	ENDDO ! mid
605
606	DEALLOCATE( tmp_array )
607	!
608	!-- Internal mask arrays cannot be deallocated on PE 0 because they are
609	!-- required for header output on PE 0.
610	IF ( myid /= 0 ) DEALLOCATE( mask, mask_loop )
611
612	CONTAINS
613
614	!------------------------------------------------------------------------------!
615	! Description:
616	! ------------
617	!> Set local mask for each subdomain along 'dim' direction.
618	!------------------------------------------------------------------------------!
619	SUBROUTINE set_mask_locations( dim, dxyz, dxyz_string, nxyz, nxyz_string, &
620	lb, ub )
621
622	IMPLICIT NONE
623
624	CHARACTER (LEN=2) :: dxyz_string !<
625	CHARACTER (LEN=2) :: nxyz_string !<
626
627	INTEGER(iwp) :: count !<
628	INTEGER(iwp) :: count_l !<
629	INTEGER(iwp) :: dim !<
630	INTEGER(iwp) :: m !<
631	INTEGER(iwp) :: loop_begin !<
632	INTEGER(iwp) :: loop_end !<
633	INTEGER(iwp) :: loop_stride !<
634	INTEGER(iwp) :: lb !<
635	INTEGER(iwp) :: nxyz !<
636	INTEGER(iwp) :: ub !<
637
638	REAL(wp) :: dxyz !<
639	REAL(wp) :: ddxyz !<
640	REAL(wp) :: tmp1 !<
641	REAL(wp) :: tmp2 !<
642
643	count = 0; count_l = 0
644	ddxyz = 1.0_wp / dxyz
645	tmp1 = 0.0_wp
646	tmp2 = 0.0_wp
647
648	IF ( mask(mid,dim,1) >= 0.0_wp ) THEN
649	!
650	!-- use predefined mask_* array
651	DO WHILE ( mask(mid,dim,count+1) >= 0.0_wp )
652	count = count + 1
653	IF ( dim == 1 .OR. dim == 2 ) THEN
654	m = NINT( mask(mid,dim,count) * mask_scale(dim) * ddxyz - 0.5_wp )
655	IF ( m < 0 ) m = 0 ! avoid negative values
656	ELSEIF ( dim == 3 ) THEN
657	ind_array = &
658	MINLOC( ABS( mask(mid,dim,count) * mask_scale(dim) - zu ) )
659	m = ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
660	ENDIF
661	IF ( m > (nxyz+1) ) THEN
662	WRITE ( message_string, '(I3,A,I3,A,I1,3A,I3)' ) &
663	m,' in mask ',mid,' along dimension ',dim, &
664	' exceeds (',nxyz_string,'+1) = ',nxyz+1
665	CALL message( 'init_masks', 'PA0331', 1, 2, 0, 6, 0 )
666	ENDIF
667	IF ( ( m >= lb .AND. m <= ub ) .OR. &
668	( m == (nxyz+1) .AND. ub == nxyz ) ) THEN
669	IF ( count_l == 0 ) mask_start_l(mid,dim) = count
670	count_l = count_l + 1
671	IF ( dim == 1 ) THEN
672	mask_i(mid,count_l) = m
673	ELSEIF ( dim == 2 ) THEN
674	mask_j(mid,count_l) = m
675	ELSEIF ( dim == 3 ) THEN
676	mask_k(mid,count_l) = m
677	ENDIF
678	ENDIF
679	IF ( count == mask_xyz_dimension ) EXIT
680	ENDDO
681	mask_size(mid,dim) = count
682	mask_size_l(mid,dim) = count_l
683
684	ELSE
685	!
686	!-- use predefined mask_loop_* array, or use the default (all grid points
687	!-- along this direction)
688	IF ( mask_loop(mid,dim,1) < 0.0_wp ) THEN
689	tmp1 = mask_loop(mid,dim,1)
690	mask_loop(mid,dim,1) = zw(nzb) ! lowest level (default)
691	ENDIF
692	IF ( dim == 1 .OR. dim == 2 ) THEN
693	IF ( mask_loop(mid,dim,2) < 0.0_wp ) THEN
694	tmp2 = mask_loop(mid,dim,2)
695	mask_loop(mid,dim,2) = (nxyz+1)*dxyz / mask_scale(dim) ! (default)
696	ENDIF
697	IF ( MAXVAL( mask_loop(mid,dim,1:2) ) &
698	> (nxyz+1) * dxyz / mask_scale(dim) ) THEN
699	WRITE ( message_string, '(2(A,I3,A,I1,A,F9.3),5A,I1,A,F9.3)' ) &
700	'mask_loop(',mid,',',dim,',1)=',mask_loop(mid,dim,1), &
701	' and/or mask_loop(',mid,',',dim,',2)=', &
702	mask_loop(mid,dim,2),' exceed (', &
703	nxyz_string,'+1)*',dxyz_string,'/mask_scale(',dim,')=', &
704	(nxyz+1)*dxyz/mask_scale(dim)
705	CALL message( 'init_masks', 'PA0332', 1, 2, 0, 6, 0 )
706	ENDIF
707	loop_begin = NINT( mask_loop(mid,dim,1) * mask_scale(dim) &
708	* ddxyz - 0.5_wp )
709	loop_end = NINT( mask_loop(mid,dim,2) * mask_scale(dim) &
710	* ddxyz - 0.5_wp )
711	loop_stride = NINT( mask_loop(mid,dim,3) * mask_scale(dim) &
712	* ddxyz )
713	IF ( loop_begin == -1 ) loop_begin = 0 ! avoid negative values
714	ELSEIF ( dim == 3 ) THEN
715	IF ( mask_loop(mid,dim,2) < 0.0_wp ) THEN
716	tmp2 = mask_loop(mid,dim,2)
717	mask_loop(mid,dim,2) = zu(nz+1) / mask_scale(dim) ! (default)
718	ENDIF
719	IF ( MAXVAL( mask_loop(mid,dim,1:2) ) &
720	> zu(nz+1) / mask_scale(dim) ) THEN
721	WRITE ( message_string, '(2(A,I3,A,I1,A,F9.3),A,I1,A,F9.3)' ) &
722	'mask_loop(',mid,',',dim,',1)=',mask_loop(mid,dim,1), &
723	' and/or mask_loop(',mid,',',dim,',2)=', &
724	mask_loop(mid,dim,2),' exceed zu(nz+1)/mask_scale(',dim, &
725	')=',zu(nz+1)/mask_scale(dim)
726	CALL message( 'init_masks', 'PA0333', 1, 2, 0, 6, 0 )
727	ENDIF
728	ind_array = &
729	MINLOC( ABS( mask_loop(mid,dim,1) * mask_scale(dim) - zu ) )
730	loop_begin = &
731	ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
732	ind_array = &
733	MINLOC( ABS( mask_loop(mid,dim,2) * mask_scale(dim) - zu ) )
734	loop_end = ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
735	!
736	!-- The following line assumes a constant vertical grid spacing within
737	!-- the vertical mask range; it fails for vertical grid stretching.
738	!-- Maybe revise later. Issue warning but continue execution. ABS(...)
739	!-- within the IF statement is necessary because the default value of
740	!-- dz_stretch_level_start is -9999999.9_wp.
741	loop_stride = NINT( mask_loop(mid,dim,3) * mask_scale(dim) * ddxyz )
742
743	IF ( mask_loop(mid,dim,2) * mask_scale(dim) > &
744	ABS( dz_stretch_level_start(1) ) ) THEN
745	WRITE ( message_string, '(A,I3,A,I1,A,F9.3,A,F8.2,3A)' ) &
746	'mask_loop(',mid,',',dim,',2)=', mask_loop(mid,dim,2), &
747	' exceeds dz_stretch_level=',dz_stretch_level_start(1), &
748	'.&Vertical mask locations will not ', &
749	'match the desired heights within the stretching ', &
750	'region.'
751	CALL message( 'init_masks', 'PA0334', 0, 1, 0, 6, 0 )
752	ENDIF
753
754	ENDIF
755	!
756	!-- If necessary, reset mask_loop(mid,dim,1) and mask_loop(mid,dim,2).
757	IF ( tmp1 < 0.0_wp ) mask_loop(mid,dim,1) = tmp1
758	IF ( tmp2 < 0.0_wp ) mask_loop(mid,dim,2) = tmp2
759	!
760	!-- The default stride +/-1 (every grid point) applies if
761	!-- mask_loop(mid,dim,3) is not specified (its default is zero).
762	IF ( loop_stride == 0 ) THEN
763	IF ( loop_end >= loop_begin ) THEN
764	loop_stride = 1
765	ELSE
766	loop_stride = -1
767	ENDIF
768	ENDIF
769	DO m = loop_begin, loop_end, loop_stride
770	count = count + 1
771	IF ( ( m >= lb .AND. m <= ub ) .OR. &
772	( m == (nxyz+1) .AND. ub == nxyz ) ) THEN
773	IF ( count_l == 0 ) mask_start_l(mid,dim) = count
774	count_l = count_l + 1
775	IF ( dim == 1 ) THEN
776	mask_i(mid,count_l) = m
777	ELSEIF ( dim == 2 ) THEN
778	mask_j(mid,count_l) = m
779	ELSEIF ( dim == 3 ) THEN
780	mask_k(mid,count_l) = m
781	ENDIF
782	ENDIF
783	ENDDO
784	mask_size(mid,dim) = count
785	mask_size_l(mid,dim) = count_l
786
787	ENDIF
788
789	END SUBROUTINE set_mask_locations
790
791	END SUBROUTINE init_masks

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