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source: palm/trunk/SOURCE/init_masks.f90 @ 1985

Last change on this file since 1985 was 1823, checked in by hoffmann, 9 years ago
last commit documented
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File size: 28.8 KB

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[1682]	1	!> @file init_masks.f90
[1036]	2	!--------------------------------------------------------------------------------!
	3	! This file is part of PALM.
	4	!
	5	! PALM is free software: you can redistribute it and/or modify it under the terms
	6	! of the GNU General Public License as published by the Free Software Foundation,
	7	! either version 3 of the License, or (at your option) any later version.
	8	!
	9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
	10	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	11	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
	12	!
	13	! You should have received a copy of the GNU General Public License along with
	14	! PALM. If not, see <http://www.gnu.org/licenses/>.
	15	!
[1818]	16	! Copyright 1997-2016 Leibniz Universitaet Hannover
[1036]	17	!--------------------------------------------------------------------------------!
	18	!
[484]	19	! Current revisions:
[298]	20	! -----------------
[1823]	21	!
[1805]	22	!
[1321]	23	! Former revisions:
	24	! -----------------
	25	! $Id: init_masks.f90 1823 2016-04-07 08:57:52Z suehring $
	26	!
[1823]	27	! 1822 2016-04-07 07:49:42Z hoffmann
	28	! icloud_scheme replaced by microphysics_*
	29	!
[1805]	30	! 1804 2016-04-05 16:30:18Z maronga
	31	! Removed code for parameter file check (__check)
	32	!
[1784]	33	! 1783 2016-03-06 18:36:17Z raasch
	34	! netcdf module name changed + related changes
	35	!
[1683]	36	! 1682 2015-10-07 23:56:08Z knoop
	37	! Code annotations made doxygen readable
	38	!
[1439]	39	! 1438 2014-07-22 14:14:06Z heinze
	40	! +nr, qc, qr
	41	!
[1415]	42	! 1414 2014-05-31 11:19:48Z gronemeier
	43	! Bugfix: first and last grid points as they appear in 3D volume data can now
	44	! be included to masked data output
	45	!
[1354]	46	! 1353 2014-04-08 15:21:23Z heinze
	47	! REAL constants provided with KIND-attribute
	48	!
[1325]	49	! 1324 2014-03-21 09:13:16Z suehring
	50	! Bugfix: ONLY statement for module netcdf_control removed
	51	!
[1321]	52	! 1320 2014-03-20 08:40:49Z raasch
[1320]	53	! ONLY-attribute added to USE-statements,
	54	! kind-parameters added to all INTEGER and REAL declaration statements,
	55	! kinds are defined in new module kinds,
	56	! revision history before 2012 removed,
	57	! comment fields (!:) to be used for variable explanations added to
	58	! all variable declaration statements
[298]	59	!
[1187]	60	! 1186 2013-06-18 06:22:52Z raasch
	61	! bugfix: 0.0 replaced by zu(nzb) as the lowest default height level for masks,
	62	! because a zero value does not work in case of ocean runs
	63	!
[1037]	64	! 1036 2012-10-22 13:43:42Z raasch
	65	! code put under GPL (PALM 3.9)
	66	!
[1033]	67	! 1032 2012-10-21 13:03:21Z letzel
	68	! mask locations determined based on scalar positions
	69	!
[1035]	70	! 1031 2012-10-19 14:35:30Z raasch
	71	! netCDF4 without parallel file support implemented
	72	!
[997]	73	! 996 2012-09-07 10:41:47Z raasch
	74	! little reformatting
	75	!
[979]	76	! 978 2012-08-09 08:28:32Z fricke
	77	! +z0h*
	78	!
[810]	79	! 809 2012-01-30 13:32:58Z maronga
	80	! Bugfix: replaced .AND. and .NOT. with && and ! in the preprocessor directives
	81	!
[808]	82	! 807 2012-01-25 11:53:51Z maronga
	83	! New cpp directive "__check" implemented which is used by check_namelist_files
	84	!
[449]	85	! 410 2009-12-04 17:05:40Z letzel
	86	! Initial revision
[298]	87	!
[449]	88	!
[298]	89	! Description:
	90	! ------------
[1682]	91	!> Initialize masked data output
[298]	92	!------------------------------------------------------------------------------!
[1682]	93	SUBROUTINE init_masks
[298]	94
[1320]	95	USE arrays_3d, &
	96	ONLY: zu, zw
	97
	98	USE control_parameters, &
	99	ONLY: constant_diffusion, cloud_droplets, cloud_physics, &
	100	data_output_masks, data_output_masks_user, &
	101	doav, doav_n, domask, domask_no, dz, dz_stretch_level, humidity,&
[1822]	102	mask, masks, mask_scale, mask_i, &
[1320]	103	mask_i_global, mask_j, mask_j_global, mask_k, mask_k_global, &
	104	mask_loop, mask_size, mask_size_l, mask_start_l, mask_x, &
	105	mask_x_loop, mask_xyz_dimension, mask_y, mask_y_loop, mask_z, &
	106	mask_z_loop, max_masks, message_string, mid, &
[1822]	107	microphysics_seifert, passive_scalar, ocean
[1320]	108
	109	USE grid_variables, &
	110	ONLY: dx, dy
	111
	112	USE indices, &
	113	ONLY: nx, nxl, nxr, ny, nyn, nys, nz, nzb, nzt
	114
	115	USE kinds
	116
[1783]	117	USE netcdf_interface, &
	118	ONLY: domask_unit, netcdf_data_format
[1320]	119
	120	USE particle_attributes, &
	121	ONLY: particle_advection
	122
[298]	123	USE pegrid
	124
	125	IMPLICIT NONE
	126
[1682]	127	CHARACTER (LEN=6) :: var !<
	128	CHARACTER (LEN=7) :: unit !<
[1320]	129
[1682]	130	CHARACTER (LEN=10), DIMENSION(max_masks,100) :: do_mask !<
	131	CHARACTER (LEN=10), DIMENSION(max_masks,100) :: do_mask_user !<
[298]	132
[1682]	133	INTEGER(iwp) :: i !<
	134	INTEGER(iwp) :: ilen !<
	135	INTEGER(iwp) :: ind(6) !<
	136	INTEGER(iwp) :: ind_array(1) !<
	137	INTEGER(iwp) :: j !<
	138	INTEGER(iwp) :: k !<
	139	INTEGER(iwp) :: n !<
	140	INTEGER(iwp) :: sender !<
[1320]	141
[1682]	142	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: tmp_array !<
[298]	143
[1682]	144	LOGICAL :: found !<
[298]	145	!
	146	!-- Allocation and initialization
[1414]	147	ALLOCATE( tmp_array( MAX(nx,ny,nz)+2 ) )
[298]	148
[1414]	149	ALLOCATE( mask_i(max_masks,nxr-nxl+2), &
	150	mask_j(max_masks,nyn-nys+2), &
	151	mask_k(max_masks,nzt-nzb+2) )
[298]	152	!
	153	!-- internal mask arrays ("mask,dimension,selection")
	154	ALLOCATE( mask(max_masks,3,mask_xyz_dimension), &
	155	mask_loop(max_masks,3,3) )
[493]	156
[298]	157	!
[493]	158	!-- Parallel mask output not yet tested
[1031]	159	IF ( netcdf_data_format > 4 ) THEN
[996]	160	message_string = 'netCDF file formats '// &
	161	'3 (netCDF 4) and 4 (netCDF 4 Classic model)'// &
[493]	162	'&are currently not supported (not yet tested).'
[564]	163	CALL message( 'init_masks', 'PA0328', 1, 2, 0, 6, 0 )
[298]	164	ENDIF
[553]	165
[298]	166	!
	167	!-- Store data output parameters for masked data output in few shared arrays
[996]	168	DO mid = 1, masks
[564]	169
[553]	170	do_mask (mid,:) = data_output_masks(mid,:)
	171	do_mask_user(mid,:) = data_output_masks_user(mid,:)
	172	mask (mid,1,:) = mask_x(mid,:)
	173	mask (mid,2,:) = mask_y(mid,:)
	174	mask (mid,3,:) = mask_z(mid,:)
[564]	175
[1353]	176	IF ( mask_x_loop(mid,1) == -1.0_wp .AND. mask_x_loop(mid,2) == -1.0_wp&
	177	.AND. mask_x_loop(mid,3) == -1.0_wp ) THEN
	178	mask_loop(mid,1,1:2) = -1.0_wp
	179	mask_loop(mid,1,3) = 0.0_wp
[564]	180	ELSE
	181	mask_loop(mid,1,:) = mask_x_loop(mid,:)
	182	ENDIF
[1353]	183	IF ( mask_y_loop(mid,1) == -1.0_wp .AND. mask_y_loop(mid,2) == -1.0_wp&
	184	.AND. mask_y_loop(mid,3) == -1.0_wp ) THEN
	185	mask_loop(mid,2,1:2) = -1.0_wp
	186	mask_loop(mid,2,3) = 0.0_wp
[564]	187	ELSE
	188	mask_loop(mid,2,:) = mask_y_loop(mid,:)
	189	ENDIF
[1353]	190	IF ( mask_z_loop(mid,1) == -1.0_wp .AND. mask_z_loop(mid,2) == -1.0_wp&
	191	.AND. mask_z_loop(mid,3) == -1.0_wp ) THEN
	192	mask_loop(mid,3,1:2) = -1.0_wp
	193	mask_loop(mid,3,3) = 0.0_wp
[564]	194	ELSE
	195	mask_loop(mid,3,:) = mask_z_loop(mid,:)
	196	ENDIF
	197
[553]	198	ENDDO
	199
[298]	200	mask_i = -1; mask_j = -1; mask_k = -1
[553]	201
[298]	202	!
	203	!-- Global arrays are required by define_netcdf_header.
[1031]	204	IF ( myid == 0 .OR. netcdf_data_format > 4 ) THEN
[1414]	205	ALLOCATE( mask_i_global(max_masks,nx+2), &
	206	mask_j_global(max_masks,ny+2), &
	207	mask_k_global(max_masks,nz+2) )
[298]	208	mask_i_global = -1; mask_j_global = -1; mask_k_global = -1
	209	ENDIF
	210
	211	!
	212	!-- Determine variable names for each mask
	213	DO mid = 1, masks
	214	!
	215	!-- Append user-defined data output variables to the standard data output
	216	IF ( do_mask_user(mid,1) /= ' ' ) THEN
	217	i = 1
	218	DO WHILE ( do_mask(mid,i) /= ' ' .AND. i <= 100 )
	219	i = i + 1
	220	ENDDO
	221	j = 1
	222	DO WHILE ( do_mask_user(mid,j) /= ' ' .AND. j <= 100 )
	223	IF ( i > 100 ) THEN
	224	WRITE ( message_string, * ) 'number of output quantitities ', &
	225	'given by data_output_mask and data_output_mask_user ', &
	226	'exceeds the limit of 100'
[564]	227	CALL message( 'init_masks', 'PA0329', 1, 2, 0, 6, 0 )
[298]	228	ENDIF
	229	do_mask(mid,i) = do_mask_user(mid,j)
	230	i = i + 1
	231	j = j + 1
	232	ENDDO
	233	ENDIF
	234
	235	!
	236	!-- Check and set steering parameters for mask data output and averaging
	237	i = 1
[996]	238	DO WHILE ( do_mask(mid,i) /= ' ' .AND. i <= 100 )
[298]	239	!
	240	!-- Check for data averaging
	241	ilen = LEN_TRIM( do_mask(mid,i) )
	242	j = 0 ! no data averaging
	243	IF ( ilen > 3 ) THEN
	244	IF ( do_mask(mid,i)(ilen-2:ilen) == '_av' ) THEN
	245	j = 1 ! data averaging
	246	do_mask(mid,i) = do_mask(mid,i)(1:ilen-3)
	247	ENDIF
	248	ENDIF
	249	var = TRIM( do_mask(mid,i) )
	250	!
	251	!-- Check for allowed value and set units
	252	SELECT CASE ( TRIM( var ) )
	253
	254	CASE ( 'e' )
	255	IF ( constant_diffusion ) THEN
	256	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	257	'" requires constant_diffusion = .FALSE.'
[564]	258	CALL message( 'init_masks', 'PA0103', 1, 2, 0, 6, 0 )
[298]	259	ENDIF
	260	unit = 'm2/s2'
	261
[771]	262	CASE ( 'lpt' )
	263	IF ( .NOT. cloud_physics ) THEN
	264	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	265	'" requires cloud_physics = .TRUE.'
[773]	266	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
[771]	267	ENDIF
	268	unit = 'K'
	269
[1438]	270	CASE ( 'nr' )
	271	IF ( .NOT. cloud_physics ) THEN
	272	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	273	'" requires cloud_physics = .TRUE.'
	274	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
[1822]	275	ELSEIF ( .NOT. microphysics_seifert ) THEN
[1438]	276	message_string = 'output of "' // TRIM( var ) // '" requi' // &
	277	'res cloud_scheme = seifert_beheng'
	278	CALL message( 'check_parameters', 'PA0359', 1, 2, 0, 6, 0 )
	279	ENDIF
	280	unit = '1/m3'
	281
[298]	282	CASE ( 'pc', 'pr' )
	283	IF ( .NOT. particle_advection ) THEN
	284	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	285	'" requires a "particles_par"-NAMELIST in the ', &
	286	'parameter file (PARIN)'
[564]	287	CALL message( 'init_masks', 'PA0104', 1, 2, 0, 6, 0 )
[298]	288	ENDIF
	289	IF ( TRIM( var ) == 'pc' ) unit = 'number'
	290	IF ( TRIM( var ) == 'pr' ) unit = 'm'
	291
	292	CASE ( 'q', 'vpt' )
	293	IF ( .NOT. humidity ) THEN
	294	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	295	'" requires humidity = .TRUE.'
[564]	296	CALL message( 'init_masks', 'PA0105', 1, 2, 0, 6, 0 )
[298]	297	ENDIF
	298	IF ( TRIM( var ) == 'q' ) unit = 'kg/kg'
	299	IF ( TRIM( var ) == 'vpt' ) unit = 'K'
	300
[1438]	301	CASE ( 'qc' )
	302	IF ( .NOT. cloud_physics ) THEN
	303	message_string = 'output of "' // TRIM( var ) // '" requi' // &
	304	'res cloud_physics = .TRUE.'
	305	CALL message( 'check_parameters', 'PA0108', 1, 2, 0, 6, 0 )
	306	ENDIF
	307	unit = 'kg/kg'
	308
[298]	309	CASE ( 'ql' )
	310	IF ( .NOT. ( cloud_physics .OR. cloud_droplets ) ) THEN
	311	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	312	'" requires cloud_physics = .TRUE. or cloud_droplets', &
	313	' = .TRUE.'
[564]	314	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
[298]	315	ENDIF
	316	unit = 'kg/kg'
	317
	318	CASE ( 'ql_c', 'ql_v', 'ql_vp' )
	319	IF ( .NOT. cloud_droplets ) THEN
	320	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	321	'" requires cloud_droplets = .TRUE.'
[564]	322	CALL message( 'init_masks', 'PA0107', 1, 2, 0, 6, 0 )
[298]	323	ENDIF
	324	IF ( TRIM( var ) == 'ql_c' ) unit = 'kg/kg'
	325	IF ( TRIM( var ) == 'ql_v' ) unit = 'm3'
	326	IF ( TRIM( var ) == 'ql_vp' ) unit = 'none'
	327
	328	CASE ( 'qv' )
	329	IF ( .NOT. cloud_physics ) THEN
	330	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	331	'" requires cloud_physics = .TRUE.'
[564]	332	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
[298]	333	ENDIF
	334	unit = 'kg/kg'
	335
[1438]	336	CASE ( 'qr' )
	337	IF ( .NOT. cloud_physics ) THEN
	338	message_string = 'output of "' // TRIM( var ) // '" requi' // &
	339	'res cloud_physics = .TRUE.'
	340	CALL message( 'check_parameters', 'PA0108', 1, 2, 0, 6, 0 )
[1822]	341	ELSEIF ( .NOT. microphysics_seifert ) THEN
[1438]	342	message_string = 'output of "' // TRIM( var ) // '" requi' // &
	343	'res cloud_scheme = seifert_beheng'
	344	CALL message( 'check_parameters', 'PA0359', 1, 2, 0, 6, 0 )
	345	ENDIF
	346	unit = 'kg/kg'
	347
[298]	348	CASE ( 'rho' )
	349	IF ( .NOT. ocean ) THEN
	350	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	351	'" requires ocean = .TRUE.'
[564]	352	CALL message( 'init_masks', 'PA0109', 1, 2, 0, 6, 0 )
[298]	353	ENDIF
	354	unit = 'kg/m3'
	355
	356	CASE ( 's' )
	357	IF ( .NOT. passive_scalar ) THEN
	358	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	359	'" requires passive_scalar = .TRUE.'
[564]	360	CALL message( 'init_masks', 'PA0110', 1, 2, 0, 6, 0 )
[298]	361	ENDIF
	362	unit = 'conc'
	363
	364	CASE ( 'sa' )
	365	IF ( .NOT. ocean ) THEN
	366	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	367	'" requires ocean = .TRUE.'
[564]	368	CALL message( 'init_masks', 'PA0109', 1, 2, 0, 6, 0 )
[298]	369	ENDIF
	370	unit = 'psu'
	371
[978]	372	CASE ( 'u', 't', 'lwp', 'pra', 'prr', 'z0', 'z0h*' )
[298]	373	WRITE ( message_string, * ) 'illegal value for data_',&
	374	'output: "', TRIM( var ), '" is only allowed', &
	375	'for horizontal cross section'
[564]	376	CALL message( 'init_masks', 'PA0111', 1, 2, 0, 6, 0 )
[298]	377
	378	CASE ( 'p', 'pt', 'u', 'v', 'w' )
	379	IF ( TRIM( var ) == 'p' ) unit = 'Pa'
	380	IF ( TRIM( var ) == 'pt' ) unit = 'K'
	381	IF ( TRIM( var ) == 'u' ) unit = 'm/s'
	382	IF ( TRIM( var ) == 'v' ) unit = 'm/s'
	383	IF ( TRIM( var ) == 'w' ) unit = 'm/s'
	384	CONTINUE
	385
	386	CASE DEFAULT
	387	CALL user_check_data_output( var, unit )
	388
	389	IF ( unit == 'illegal' ) THEN
	390	IF ( do_mask_user(mid,1) /= ' ' ) THEN
	391	WRITE ( message_string, * ) 'illegal value for data_',&
	392	'output or data_output_user: "', &
	393	TRIM( do_mask(mid,i) ), '"'
[564]	394	CALL message( 'init_masks', 'PA0114', 1, 2, 0, 6, 0 )
[298]	395	ELSE
	396	WRITE ( message_string, * ) 'illegal value for data_',&
	397	'output: "', TRIM( do_mask(mid,i) ), '"'
[564]	398	CALL message( 'init_masks', 'PA0330', 1, 2, 0, 6, 0 )
[298]	399	ENDIF
	400	ENDIF
	401
	402	END SELECT
	403	!
	404	!-- Set the internal steering parameters appropriately
	405	domask_no(mid,j) = domask_no(mid,j) + 1
	406	domask(mid,j,domask_no(mid,j)) = do_mask(mid,i)
	407	domask_unit(mid,j,domask_no(mid,j)) = unit
	408
	409	IF ( j == 1 ) THEN
	410	!
	411	!-- Check, if variable is already subject to averaging
	412	found = .FALSE.
	413	DO k = 1, doav_n
	414	IF ( TRIM( doav(k) ) == TRIM( var ) ) found = .TRUE.
	415	ENDDO
	416
	417	IF ( .NOT. found ) THEN
	418	doav_n = doav_n + 1
	419	doav(doav_n) = var
	420	ENDIF
	421	ENDIF
	422
	423	i = i + 1
	424
	425	ENDDO ! do_mask(mid,i)
	426	ENDDO ! mid
	427
	428
	429	!
	430	!-- Determine mask locations for each mask
	431	DO mid = 1, masks
	432	!
	433	!-- Set local masks for each subdomain along all three dimensions
	434	CALL set_mask_locations( 1, dx, 'dx', nx, 'nx', nxl, nxr )
	435	CALL set_mask_locations( 2, dy, 'dy', ny, 'ny', nys, nyn )
	436	CALL set_mask_locations( 3, dz, 'dz', nz, 'nz', nzb, nzt )
	437	!
	438	!-- Set global masks along all three dimensions (required by
	439	!-- define_netcdf_header).
[1804]	440	#if defined( __parallel )
[298]	441	!
	442	!-- PE0 receives partial arrays from all processors of the respective mask
	443	!-- and outputs them. Here a barrier has to be set, because otherwise
	444	!-- "-MPI- FATAL: Remote protocol queue full" may occur.
[807]	445
[298]	446	CALL MPI_BARRIER( comm2d, ierr )
	447
	448	IF ( myid == 0 ) THEN
	449	!
	450	!-- Local arrays can be relocated directly.
	451	mask_i_global(mid,mask_start_l(mid,1): &
	452	mask_start_l(mid,1)+mask_size_l(mid,1)-1) = &
	453	mask_i(mid,:mask_size_l(mid,1))
	454	mask_j_global(mid,mask_start_l(mid,2): &
	455	mask_start_l(mid,2)+mask_size_l(mid,2)-1) = &
	456	mask_j(mid,:mask_size_l(mid,2))
	457	mask_k_global(mid,mask_start_l(mid,3): &
	458	mask_start_l(mid,3)+mask_size_l(mid,3)-1) = &
	459	mask_k(mid,:mask_size_l(mid,3))
	460	!
	461	!-- Receive data from all other PEs.
	462	DO n = 1, numprocs-1
	463	!
	464	!-- Receive index limits first, then arrays.
	465	!-- Index limits are received in arbitrary order from the PEs.
	466	CALL MPI_RECV( ind(1), 6, MPI_INTEGER, MPI_ANY_SOURCE, 0, &
	467	comm2d, status, ierr )
	468	!
	469	!-- Not all PEs have data for the mask.
	470	IF ( ind(1) /= -9999 ) THEN
	471	sender = status(MPI_SOURCE)
	472	CALL MPI_RECV( tmp_array(ind(1)), ind(2)-ind(1)+1, &
[363]	473	MPI_INTEGER, sender, 1, comm2d, status, ierr )
[298]	474	mask_i_global(mid,ind(1):ind(2)) = tmp_array(ind(1):ind(2))
	475	CALL MPI_RECV( tmp_array(ind(3)), ind(4)-ind(3)+1, &
[363]	476	MPI_INTEGER, sender, 2, comm2d, status, ierr )
[298]	477	mask_j_global(mid,ind(3):ind(4)) = tmp_array(ind(3):ind(4))
	478	CALL MPI_RECV( tmp_array(ind(5)), ind(6)-ind(5)+1, &
[363]	479	MPI_INTEGER, sender, 3, comm2d, status, ierr )
[298]	480	mask_k_global(mid,ind(5):ind(6)) = tmp_array(ind(5):ind(6))
	481	ENDIF
	482	ENDDO
	483
	484	ELSE
	485	!
	486	!-- If at least part of the mask resides on the PE, send the index limits
	487	!-- for the target array, otherwise send -9999 to PE0.
[996]	488	IF ( mask_size_l(mid,1) > 0 .AND. mask_size_l(mid,2) > 0 .AND. &
	489	mask_size_l(mid,3) > 0 ) THEN
[298]	490	ind(1) = mask_start_l(mid,1)
	491	ind(2) = mask_start_l(mid,1) + mask_size_l(mid,1) - 1
	492	ind(3) = mask_start_l(mid,2)
	493	ind(4) = mask_start_l(mid,2) + mask_size_l(mid,2) - 1
	494	ind(5) = mask_start_l(mid,3)
	495	ind(6) = mask_start_l(mid,3) + mask_size_l(mid,3) - 1
	496	ELSE
	497	ind(1) = -9999; ind(2) = -9999
	498	ind(3) = -9999; ind(4) = -9999
	499	ind(5) = -9999; ind(6) = -9999
	500	ENDIF
	501	CALL MPI_SEND( ind(1), 6, MPI_INTEGER, 0, 0, comm2d, ierr )
	502	!
	503	!-- If applicable, send data to PE0.
	504	IF ( ind(1) /= -9999 ) THEN
	505	tmp_array(:mask_size_l(mid,1)) = mask_i(mid,:mask_size_l(mid,1))
	506	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,1), &
[363]	507	MPI_INTEGER, 0, 1, comm2d, ierr )
[298]	508	tmp_array(:mask_size_l(mid,2)) = mask_j(mid,:mask_size_l(mid,2))
	509	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,2), &
[363]	510	MPI_INTEGER, 0, 2, comm2d, ierr )
[298]	511	tmp_array(:mask_size_l(mid,3)) = mask_k(mid,:mask_size_l(mid,3))
	512	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,3), &
[363]	513	MPI_INTEGER, 0, 3, comm2d, ierr )
[298]	514	ENDIF
	515	ENDIF
	516	!
	517	!-- A barrier has to be set, because otherwise some PEs may proceed too fast
	518	!-- so that PE0 may receive wrong data on tag 0.
	519	CALL MPI_BARRIER( comm2d, ierr )
[409]	520
[1031]	521	IF ( netcdf_data_format > 4 ) THEN
[409]	522
[1414]	523	CALL MPI_BCAST( mask_i_global(mid,:), nx+2, MPI_INTEGER, 0, comm2d, &
[493]	524	ierr )
[1414]	525	CALL MPI_BCAST( mask_j_global(mid,:), ny+2, MPI_INTEGER, 0, comm2d, &
[493]	526	ierr )
[1414]	527	CALL MPI_BCAST( mask_k_global(mid,:), nz+2, MPI_INTEGER, 0, comm2d, &
[493]	528	ierr )
[1682]	529
[409]	530	ENDIF
[298]	531
[1804]	532	#else
[298]	533	!
	534	!-- Local arrays can be relocated directly.
	535	mask_i_global(mid,:) = mask_i(mid,:)
	536	mask_j_global(mid,:) = mask_j(mid,:)
	537	mask_k_global(mid,:) = mask_k(mid,:)
	538	#endif
	539	ENDDO ! mid
	540
	541	DEALLOCATE( tmp_array )
	542	!
	543	!-- Internal mask arrays cannot be deallocated on PE 0 because they are
	544	!-- required for header output on PE 0.
	545	IF ( myid /= 0 ) DEALLOCATE( mask, mask_loop )
	546
	547	CONTAINS
[493]	548
[298]	549	!------------------------------------------------------------------------------!
	550	! Description:
	551	! ------------
[1682]	552	!> Set local mask for each subdomain along 'dim' direction.
[298]	553	!------------------------------------------------------------------------------!
[1682]	554	SUBROUTINE set_mask_locations( dim, dxyz, dxyz_string, nxyz, nxyz_string, &
	555	lb, ub )
[298]	556
	557	IMPLICIT NONE
	558
[1682]	559	CHARACTER (LEN=2) :: dxyz_string !<
	560	CHARACTER (LEN=2) :: nxyz_string !<
[1320]	561
[1682]	562	INTEGER(iwp) :: count !<
	563	INTEGER(iwp) :: count_l !<
	564	INTEGER(iwp) :: dim !<
	565	INTEGER(iwp) :: m !<
	566	INTEGER(iwp) :: loop_begin !<
	567	INTEGER(iwp) :: loop_end !<
	568	INTEGER(iwp) :: loop_stride !<
	569	INTEGER(iwp) :: lb !<
	570	INTEGER(iwp) :: nxyz !<
	571	INTEGER(iwp) :: ub !<
[1320]	572
[1682]	573	REAL(wp) :: dxyz !<
	574	REAL(wp) :: ddxyz !<
	575	REAL(wp) :: tmp1 !<
	576	REAL(wp) :: tmp2 !<
[298]	577
[1353]	578	count = 0; count_l = 0
	579	ddxyz = 1.0_wp / dxyz
	580	tmp1 = 0.0_wp
	581	tmp2 = 0.0_wp
[298]	582
[1353]	583	IF ( mask(mid,dim,1) >= 0.0_wp ) THEN
[298]	584	!
	585	!-- use predefined mask_* array
[1353]	586	DO WHILE ( mask(mid,dim,count+1) >= 0.0_wp )
[298]	587	count = count + 1
	588	IF ( dim == 1 .OR. dim == 2 ) THEN
[1353]	589	m = NINT( mask(mid,dim,count) * mask_scale(dim) * ddxyz - 0.5_wp )
[1414]	590	IF ( m < 0 ) m = 0 ! avoid negative values
[298]	591	ELSEIF ( dim == 3 ) THEN
	592	ind_array = &
[595]	593	MINLOC( ABS( mask(mid,dim,count) * mask_scale(dim) - zu ) )
[298]	594	m = ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
	595	ENDIF
[1414]	596	IF ( m > (nxyz+1) ) THEN
[303]	597	WRITE ( message_string, '(I3,A,I3,A,I1,3A,I3)' ) &
	598	m,' in mask ',mid,' along dimension ',dim, &
[1414]	599	' exceeds (',nxyz_string,'+1) = ',nxyz+1
[564]	600	CALL message( 'init_masks', 'PA0331', 1, 2, 0, 6, 0 )
[298]	601	ENDIF
[1414]	602	IF ( ( m >= lb .AND. m <= ub ) .OR. &
	603	( m == (nxyz+1) .AND. ub == nxyz ) ) THEN
[298]	604	IF ( count_l == 0 ) mask_start_l(mid,dim) = count
	605	count_l = count_l + 1
	606	IF ( dim == 1 ) THEN
	607	mask_i(mid,count_l) = m
	608	ELSEIF ( dim == 2 ) THEN
	609	mask_j(mid,count_l) = m
	610	ELSEIF ( dim == 3 ) THEN
	611	mask_k(mid,count_l) = m
	612	ENDIF
	613	ENDIF
	614	IF ( count == mask_xyz_dimension ) EXIT
	615	ENDDO
	616	mask_size(mid,dim) = count
	617	mask_size_l(mid,dim) = count_l
	618
	619	ELSE
	620	!
	621	!-- use predefined mask_loop_* array, or use the default (all grid points
	622	!-- along this direction)
[1353]	623	IF ( mask_loop(mid,dim,1) < 0.0_wp ) THEN
[298]	624	tmp1 = mask_loop(mid,dim,1)
[1186]	625	mask_loop(mid,dim,1) = zw(nzb) ! lowest level (default)
[298]	626	ENDIF
	627	IF ( dim == 1 .OR. dim == 2 ) THEN
[1353]	628	IF ( mask_loop(mid,dim,2) < 0.0_wp ) THEN
[298]	629	tmp2 = mask_loop(mid,dim,2)
[1414]	630	mask_loop(mid,dim,2) = (nxyz+1)*dxyz / mask_scale(dim) ! (default)
[298]	631	ENDIF
	632	IF ( MAXVAL( mask_loop(mid,dim,1:2) ) &
[1414]	633	> (nxyz+1) * dxyz / mask_scale(dim) ) THEN
[303]	634	WRITE ( message_string, '(2(A,I3,A,I1,A,F9.3),5A,I1,A,F9.3)' ) &
	635	'mask_loop(',mid,',',dim,',1)=',mask_loop(mid,dim,1), &
	636	' and/or mask_loop(',mid,',',dim,',2)=', &
[1414]	637	mask_loop(mid,dim,2),'&exceed (', &
	638	nxyz_string,'+1)*',dxyz_string,'/mask_scale(',dim,')=', &
	639	(nxyz+1)*dxyz/mask_scale(dim)
[564]	640	CALL message( 'init_masks', 'PA0332', 1, 2, 0, 6, 0 )
[298]	641	ENDIF
[1032]	642	loop_begin = NINT( mask_loop(mid,dim,1) * mask_scale(dim) &
[1353]	643	* ddxyz - 0.5_wp )
[1032]	644	loop_end = NINT( mask_loop(mid,dim,2) * mask_scale(dim) &
[1353]	645	* ddxyz - 0.5_wp )
[1032]	646	loop_stride = NINT( mask_loop(mid,dim,3) * mask_scale(dim) &
	647	* ddxyz )
[1414]	648	IF ( loop_begin == -1 ) loop_begin = 0 ! avoid negative values
[298]	649	ELSEIF ( dim == 3 ) THEN
[1353]	650	IF ( mask_loop(mid,dim,2) < 0.0_wp ) THEN
[298]	651	tmp2 = mask_loop(mid,dim,2)
[1414]	652	mask_loop(mid,dim,2) = zu(nz+1) / mask_scale(dim) ! (default)
[298]	653	ENDIF
	654	IF ( MAXVAL( mask_loop(mid,dim,1:2) ) &
[1414]	655	> zu(nz+1) / mask_scale(dim) ) THEN
[303]	656	WRITE ( message_string, '(2(A,I3,A,I1,A,F9.3),A,I1,A,F9.3)' ) &
	657	'mask_loop(',mid,',',dim,',1)=',mask_loop(mid,dim,1), &
	658	' and/or mask_loop(',mid,',',dim,',2)=', &
[1414]	659	mask_loop(mid,dim,2),'&exceed zu(nz+1)/mask_scale(',dim, &
	660	')=',zu(nz+1)/mask_scale(dim)
[564]	661	CALL message( 'init_masks', 'PA0333', 1, 2, 0, 6, 0 )
[298]	662	ENDIF
[303]	663	ind_array = &
[595]	664	MINLOC( ABS( mask_loop(mid,dim,1) * mask_scale(dim) - zu ) )
[298]	665	loop_begin = &
[303]	666	ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
	667	ind_array = &
[595]	668	MINLOC( ABS( mask_loop(mid,dim,2) * mask_scale(dim) - zu ) )
[298]	669	loop_end = ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
	670	!
[303]	671	!-- The following line assumes a constant vertical grid spacing within
	672	!-- the vertical mask range; it fails for vertical grid stretching.
	673	!-- Maybe revise later. Issue warning but continue execution.
	674	loop_stride = NINT( mask_loop(mid,dim,3) * mask_scale(dim) * ddxyz )
	675
	676	IF ( mask_loop(mid,dim,2) * mask_scale(dim) > dz_stretch_level ) &
	677	THEN
[557]	678	WRITE ( message_string, '(A,I3,A,I1,A,F9.3,A,F8.2,3A)' ) &
	679	'mask_loop(',mid,',',dim,',2)=', mask_loop(mid,dim,2),&
[303]	680	' exceeds dz_stretch_level=',dz_stretch_level, &
	681	'.&Vertical mask locations will not ', &
	682	'match the desired heights&within the stretching ', &
	683	'region. Recommendation: use mask instead of mask_loop.'
[564]	684	CALL message( 'init_masks', 'PA0334', 0, 1, 0, 6, 0 )
[303]	685	ENDIF
	686
[298]	687	ENDIF
	688	!
	689	!-- If necessary, reset mask_loop(mid,dim,1) and mask_loop(mid,dim,2).
[1353]	690	IF ( tmp1 < 0.0_wp ) mask_loop(mid,dim,1) = tmp1
	691	IF ( tmp2 < 0.0_wp ) mask_loop(mid,dim,2) = tmp2
[298]	692	!
	693	!-- The default stride +/-1 (every grid point) applies if
	694	!-- mask_loop(mid,dim,3) is not specified (its default is zero).
	695	IF ( loop_stride == 0 ) THEN
	696	IF ( loop_end >= loop_begin ) THEN
	697	loop_stride = 1
	698	ELSE
	699	loop_stride = -1
	700	ENDIF
	701	ENDIF
	702	DO m = loop_begin, loop_end, loop_stride
	703	count = count + 1
[1414]	704	IF ( ( m >= lb .AND. m <= ub ) .OR. &
	705	( m == (nxyz+1) .AND. ub == nxyz ) ) THEN
[298]	706	IF ( count_l == 0 ) mask_start_l(mid,dim) = count
	707	count_l = count_l + 1
	708	IF ( dim == 1 ) THEN
	709	mask_i(mid,count_l) = m
	710	ELSEIF ( dim == 2 ) THEN
	711	mask_j(mid,count_l) = m
	712	ELSEIF ( dim == 3 ) THEN
	713	mask_k(mid,count_l) = m
	714	ENDIF
	715	ENDIF
	716	ENDDO
	717	mask_size(mid,dim) = count
	718	mask_size_l(mid,dim) = count_l
[1414]	719
[298]	720	ENDIF
	721
	722	END SUBROUTINE set_mask_locations
	723
	724	END SUBROUTINE init_masks

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