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source: palm/trunk/SOURCE/init_masks.f90 @ 1172

Last change on this file since 1172 was 1037, checked in by raasch, 12 years ago
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[298]	1	SUBROUTINE init_masks
	2
[1036]	3	!--------------------------------------------------------------------------------!
	4	! This file is part of PALM.
	5	!
	6	! PALM is free software: you can redistribute it and/or modify it under the terms
	7	! of the GNU General Public License as published by the Free Software Foundation,
	8	! either version 3 of the License, or (at your option) any later 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 1997-2012 Leibniz University Hannover
	18	!--------------------------------------------------------------------------------!
	19	!
[484]	20	! Current revisions:
[298]	21	! -----------------
	22	!
[1035]	23	!
[298]	24	! Former revisions:
	25	! -----------------
	26	! $Id: init_masks.f90 1037 2012-10-22 14:10:22Z raasch $
	27	!
[1037]	28	! 1036 2012-10-22 13:43:42Z raasch
	29	! code put under GPL (PALM 3.9)
	30	!
[1033]	31	! 1032 2012-10-21 13:03:21Z letzel
	32	! mask locations determined based on scalar positions
	33	!
[1035]	34	! 1031 2012-10-19 14:35:30Z raasch
	35	! netCDF4 without parallel file support implemented
	36	!
[997]	37	! 996 2012-09-07 10:41:47Z raasch
	38	! little reformatting
	39	!
[979]	40	! 978 2012-08-09 08:28:32Z fricke
	41	! +z0h*
	42	!
[810]	43	! 809 2012-01-30 13:32:58Z maronga
	44	! Bugfix: replaced .AND. and .NOT. with && and ! in the preprocessor directives
	45	!
[808]	46	! 807 2012-01-25 11:53:51Z maronga
	47	! New cpp directive "__check" implemented which is used by check_namelist_files
	48	!
[772]	49	! 771 2011-10-27 10:56:21Z heinze
	50	! +lpt
	51	!
[596]	52	! 595 2010-11-12 09:52:10Z helmke
	53	! Calculation of z locations for masked output changed
	54	!
[565]	55	! 564 2010-09-30 13:18:59Z helmke
	56	! assignment of mask_xyz_loop added, palm message identifiers of masked output
	57	! changed
	58	!
[558]	59	! 557 2010-09-07 14:50:07Z weinreis
	60	! bugfix message string in set_mask_locations
	61	!
[554]	62	! 553 2010-09-01 14:09:06Z weinreis
	63	! parameters for masked output are replaced by arrays
	64	!
[494]	65	! 493 2010-03-01 08:30:24Z raasch
	66	! netcdf_format_mask* and format_parallel_io replaced by netcdf_data_format
	67	!
[449]	68	! 410 2009-12-04 17:05:40Z letzel
	69	! Initial revision
[298]	70	!
[449]	71	!
[298]	72	! Description:
	73	! ------------
	74	! Initialize masked data output
	75	!------------------------------------------------------------------------------!
	76
	77	USE arrays_3d
	78	USE control_parameters
	79	USE grid_variables
	80	USE indices
	81	USE netcdf_control
	82	USE particle_attributes
	83	USE pegrid
	84
	85	IMPLICIT NONE
	86
	87	CHARACTER (LEN=6) :: var
	88	CHARACTER (LEN=7) :: unit
	89	CHARACTER (LEN=10), DIMENSION(max_masks,100) :: do_mask, do_mask_user
	90
	91	INTEGER :: i, ilen, ind(6), ind_array(1), j, k, n, sender
	92	INTEGER, DIMENSION(:), ALLOCATABLE :: tmp_array
	93
	94	LOGICAL :: found
	95	!
	96	!-- Allocation and initialization
	97	ALLOCATE( tmp_array( MAX(nx,ny,nz)+1 ) )
	98
	99	ALLOCATE( mask_i(max_masks,nxr-nxl+1), &
	100	mask_j(max_masks,nyn-nys+1), &
	101	mask_k(max_masks,nzt-nzb+1) )
	102	!
	103	!-- internal mask arrays ("mask,dimension,selection")
	104	ALLOCATE( mask(max_masks,3,mask_xyz_dimension), &
	105	mask_loop(max_masks,3,3) )
[493]	106
[298]	107	!
[493]	108	!-- Parallel mask output not yet tested
[1031]	109	IF ( netcdf_data_format > 4 ) THEN
[996]	110	message_string = 'netCDF file formats '// &
	111	'3 (netCDF 4) and 4 (netCDF 4 Classic model)'// &
[493]	112	'&are currently not supported (not yet tested).'
[564]	113	CALL message( 'init_masks', 'PA0328', 1, 2, 0, 6, 0 )
[298]	114	ENDIF
[553]	115
[298]	116	!
	117	!-- Store data output parameters for masked data output in few shared arrays
[996]	118	DO mid = 1, masks
[564]	119
[553]	120	do_mask (mid,:) = data_output_masks(mid,:)
	121	do_mask_user(mid,:) = data_output_masks_user(mid,:)
	122	mask (mid,1,:) = mask_x(mid,:)
	123	mask (mid,2,:) = mask_y(mid,:)
	124	mask (mid,3,:) = mask_z(mid,:)
[564]	125
[996]	126	IF ( mask_x_loop(mid,1) == -1.0 .AND. mask_x_loop(mid,2) == -1.0 &
	127	.AND. mask_x_loop(mid,3) == -1.0 ) THEN
	128	mask_loop(mid,1,1:2) = -1.0
[564]	129	mask_loop(mid,1,3) = 0.0
	130	ELSE
	131	mask_loop(mid,1,:) = mask_x_loop(mid,:)
	132	ENDIF
[996]	133	IF ( mask_y_loop(mid,1) == -1.0 .AND. mask_y_loop(mid,2) == -1.0 &
	134	.AND. mask_y_loop(mid,3) == -1.0 ) THEN
	135	mask_loop(mid,2,1:2) = -1.0
[564]	136	mask_loop(mid,2,3) = 0.0
	137	ELSE
	138	mask_loop(mid,2,:) = mask_y_loop(mid,:)
	139	ENDIF
[996]	140	IF ( mask_z_loop(mid,1) == -1.0 .AND. mask_z_loop(mid,2) == -1.0 &
	141	.AND. mask_z_loop(mid,3) == -1.0 ) THEN
	142	mask_loop(mid,3,1:2) = -1.0
[564]	143	mask_loop(mid,3,3) = 0.0
	144	ELSE
	145	mask_loop(mid,3,:) = mask_z_loop(mid,:)
	146	ENDIF
	147
[553]	148	ENDDO
	149
[298]	150	mask_i = -1; mask_j = -1; mask_k = -1
[553]	151
[298]	152	!
	153	!-- Global arrays are required by define_netcdf_header.
[1031]	154	IF ( myid == 0 .OR. netcdf_data_format > 4 ) THEN
[298]	155	ALLOCATE( mask_i_global(max_masks,nx+1), &
	156	mask_j_global(max_masks,ny+1), &
	157	mask_k_global(max_masks,nz+1) )
	158	mask_i_global = -1; mask_j_global = -1; mask_k_global = -1
	159	ENDIF
	160
	161	!
	162	!-- Determine variable names for each mask
	163	DO mid = 1, masks
	164	!
	165	!-- Append user-defined data output variables to the standard data output
	166	IF ( do_mask_user(mid,1) /= ' ' ) THEN
	167	i = 1
	168	DO WHILE ( do_mask(mid,i) /= ' ' .AND. i <= 100 )
	169	i = i + 1
	170	ENDDO
	171	j = 1
	172	DO WHILE ( do_mask_user(mid,j) /= ' ' .AND. j <= 100 )
	173	IF ( i > 100 ) THEN
	174	WRITE ( message_string, * ) 'number of output quantitities ', &
	175	'given by data_output_mask and data_output_mask_user ', &
	176	'exceeds the limit of 100'
[564]	177	CALL message( 'init_masks', 'PA0329', 1, 2, 0, 6, 0 )
[298]	178	ENDIF
	179	do_mask(mid,i) = do_mask_user(mid,j)
	180	i = i + 1
	181	j = j + 1
	182	ENDDO
	183	ENDIF
	184
	185	!
	186	!-- Check and set steering parameters for mask data output and averaging
	187	i = 1
[996]	188	DO WHILE ( do_mask(mid,i) /= ' ' .AND. i <= 100 )
[298]	189	!
	190	!-- Check for data averaging
	191	ilen = LEN_TRIM( do_mask(mid,i) )
	192	j = 0 ! no data averaging
	193	IF ( ilen > 3 ) THEN
	194	IF ( do_mask(mid,i)(ilen-2:ilen) == '_av' ) THEN
	195	j = 1 ! data averaging
	196	do_mask(mid,i) = do_mask(mid,i)(1:ilen-3)
	197	ENDIF
	198	ENDIF
	199	var = TRIM( do_mask(mid,i) )
	200	!
	201	!-- Check for allowed value and set units
	202	SELECT CASE ( TRIM( var ) )
	203
	204	CASE ( 'e' )
	205	IF ( constant_diffusion ) THEN
	206	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	207	'" requires constant_diffusion = .FALSE.'
[564]	208	CALL message( 'init_masks', 'PA0103', 1, 2, 0, 6, 0 )
[298]	209	ENDIF
	210	unit = 'm2/s2'
	211
[771]	212	CASE ( 'lpt' )
	213	IF ( .NOT. cloud_physics ) THEN
	214	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	215	'" requires cloud_physics = .TRUE.'
[773]	216	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
[771]	217	ENDIF
	218	unit = 'K'
	219
[298]	220	CASE ( 'pc', 'pr' )
	221	IF ( .NOT. particle_advection ) THEN
	222	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	223	'" requires a "particles_par"-NAMELIST in the ', &
	224	'parameter file (PARIN)'
[564]	225	CALL message( 'init_masks', 'PA0104', 1, 2, 0, 6, 0 )
[298]	226	ENDIF
	227	IF ( TRIM( var ) == 'pc' ) unit = 'number'
	228	IF ( TRIM( var ) == 'pr' ) unit = 'm'
	229
	230	CASE ( 'q', 'vpt' )
	231	IF ( .NOT. humidity ) THEN
	232	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	233	'" requires humidity = .TRUE.'
[564]	234	CALL message( 'init_masks', 'PA0105', 1, 2, 0, 6, 0 )
[298]	235	ENDIF
	236	IF ( TRIM( var ) == 'q' ) unit = 'kg/kg'
	237	IF ( TRIM( var ) == 'vpt' ) unit = 'K'
	238
	239	CASE ( 'ql' )
	240	IF ( .NOT. ( cloud_physics .OR. cloud_droplets ) ) THEN
	241	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	242	'" requires cloud_physics = .TRUE. or cloud_droplets', &
	243	' = .TRUE.'
[564]	244	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
[298]	245	ENDIF
	246	unit = 'kg/kg'
	247
	248	CASE ( 'ql_c', 'ql_v', 'ql_vp' )
	249	IF ( .NOT. cloud_droplets ) THEN
	250	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	251	'" requires cloud_droplets = .TRUE.'
[564]	252	CALL message( 'init_masks', 'PA0107', 1, 2, 0, 6, 0 )
[298]	253	ENDIF
	254	IF ( TRIM( var ) == 'ql_c' ) unit = 'kg/kg'
	255	IF ( TRIM( var ) == 'ql_v' ) unit = 'm3'
	256	IF ( TRIM( var ) == 'ql_vp' ) unit = 'none'
	257
	258	CASE ( 'qv' )
	259	IF ( .NOT. cloud_physics ) THEN
	260	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	261	'" requires cloud_physics = .TRUE.'
[564]	262	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
[298]	263	ENDIF
	264	unit = 'kg/kg'
	265
	266	CASE ( 'rho' )
	267	IF ( .NOT. ocean ) THEN
	268	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	269	'" requires ocean = .TRUE.'
[564]	270	CALL message( 'init_masks', 'PA0109', 1, 2, 0, 6, 0 )
[298]	271	ENDIF
	272	unit = 'kg/m3'
	273
	274	CASE ( 's' )
	275	IF ( .NOT. passive_scalar ) THEN
	276	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	277	'" requires passive_scalar = .TRUE.'
[564]	278	CALL message( 'init_masks', 'PA0110', 1, 2, 0, 6, 0 )
[298]	279	ENDIF
	280	unit = 'conc'
	281
	282	CASE ( 'sa' )
	283	IF ( .NOT. ocean ) THEN
	284	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	285	'" requires ocean = .TRUE.'
[564]	286	CALL message( 'init_masks', 'PA0109', 1, 2, 0, 6, 0 )
[298]	287	ENDIF
	288	unit = 'psu'
	289
[978]	290	CASE ( 'u', 't', 'lwp', 'pra', 'prr', 'z0', 'z0h*' )
[298]	291	WRITE ( message_string, * ) 'illegal value for data_',&
	292	'output: "', TRIM( var ), '" is only allowed', &
	293	'for horizontal cross section'
[564]	294	CALL message( 'init_masks', 'PA0111', 1, 2, 0, 6, 0 )
[298]	295
	296	CASE ( 'p', 'pt', 'u', 'v', 'w' )
	297	IF ( TRIM( var ) == 'p' ) unit = 'Pa'
	298	IF ( TRIM( var ) == 'pt' ) unit = 'K'
	299	IF ( TRIM( var ) == 'u' ) unit = 'm/s'
	300	IF ( TRIM( var ) == 'v' ) unit = 'm/s'
	301	IF ( TRIM( var ) == 'w' ) unit = 'm/s'
	302	CONTINUE
	303
	304	CASE DEFAULT
	305	CALL user_check_data_output( var, unit )
	306
	307	IF ( unit == 'illegal' ) THEN
	308	IF ( do_mask_user(mid,1) /= ' ' ) THEN
	309	WRITE ( message_string, * ) 'illegal value for data_',&
	310	'output or data_output_user: "', &
	311	TRIM( do_mask(mid,i) ), '"'
[564]	312	CALL message( 'init_masks', 'PA0114', 1, 2, 0, 6, 0 )
[298]	313	ELSE
	314	WRITE ( message_string, * ) 'illegal value for data_',&
	315	'output: "', TRIM( do_mask(mid,i) ), '"'
[564]	316	CALL message( 'init_masks', 'PA0330', 1, 2, 0, 6, 0 )
[298]	317	ENDIF
	318	ENDIF
	319
	320	END SELECT
	321	!
	322	!-- Set the internal steering parameters appropriately
	323	domask_no(mid,j) = domask_no(mid,j) + 1
	324	domask(mid,j,domask_no(mid,j)) = do_mask(mid,i)
	325	domask_unit(mid,j,domask_no(mid,j)) = unit
	326
	327	IF ( j == 1 ) THEN
	328	!
	329	!-- Check, if variable is already subject to averaging
	330	found = .FALSE.
	331	DO k = 1, doav_n
	332	IF ( TRIM( doav(k) ) == TRIM( var ) ) found = .TRUE.
	333	ENDDO
	334
	335	IF ( .NOT. found ) THEN
	336	doav_n = doav_n + 1
	337	doav(doav_n) = var
	338	ENDIF
	339	ENDIF
	340
	341	i = i + 1
	342
	343	ENDDO ! do_mask(mid,i)
	344	ENDDO ! mid
	345
	346
	347	!
	348	!-- Determine mask locations for each mask
	349	DO mid = 1, masks
	350	!
	351	!-- Set local masks for each subdomain along all three dimensions
	352	CALL set_mask_locations( 1, dx, 'dx', nx, 'nx', nxl, nxr )
	353	CALL set_mask_locations( 2, dy, 'dy', ny, 'ny', nys, nyn )
	354	CALL set_mask_locations( 3, dz, 'dz', nz, 'nz', nzb, nzt )
	355	!
	356	!-- Set global masks along all three dimensions (required by
	357	!-- define_netcdf_header).
[809]	358	#if defined( __parallel ) && ! defined ( __check )
[298]	359	!
	360	!-- PE0 receives partial arrays from all processors of the respective mask
	361	!-- and outputs them. Here a barrier has to be set, because otherwise
	362	!-- "-MPI- FATAL: Remote protocol queue full" may occur.
[807]	363
[298]	364	CALL MPI_BARRIER( comm2d, ierr )
	365
	366	IF ( myid == 0 ) THEN
	367	!
	368	!-- Local arrays can be relocated directly.
	369	mask_i_global(mid,mask_start_l(mid,1): &
	370	mask_start_l(mid,1)+mask_size_l(mid,1)-1) = &
	371	mask_i(mid,:mask_size_l(mid,1))
	372	mask_j_global(mid,mask_start_l(mid,2): &
	373	mask_start_l(mid,2)+mask_size_l(mid,2)-1) = &
	374	mask_j(mid,:mask_size_l(mid,2))
	375	mask_k_global(mid,mask_start_l(mid,3): &
	376	mask_start_l(mid,3)+mask_size_l(mid,3)-1) = &
	377	mask_k(mid,:mask_size_l(mid,3))
	378	!
	379	!-- Receive data from all other PEs.
	380	DO n = 1, numprocs-1
	381	!
	382	!-- Receive index limits first, then arrays.
	383	!-- Index limits are received in arbitrary order from the PEs.
	384	CALL MPI_RECV( ind(1), 6, MPI_INTEGER, MPI_ANY_SOURCE, 0, &
	385	comm2d, status, ierr )
	386	!
	387	!-- Not all PEs have data for the mask.
	388	IF ( ind(1) /= -9999 ) THEN
	389	sender = status(MPI_SOURCE)
	390	CALL MPI_RECV( tmp_array(ind(1)), ind(2)-ind(1)+1, &
[363]	391	MPI_INTEGER, sender, 1, comm2d, status, ierr )
[298]	392	mask_i_global(mid,ind(1):ind(2)) = tmp_array(ind(1):ind(2))
	393	CALL MPI_RECV( tmp_array(ind(3)), ind(4)-ind(3)+1, &
[363]	394	MPI_INTEGER, sender, 2, comm2d, status, ierr )
[298]	395	mask_j_global(mid,ind(3):ind(4)) = tmp_array(ind(3):ind(4))
	396	CALL MPI_RECV( tmp_array(ind(5)), ind(6)-ind(5)+1, &
[363]	397	MPI_INTEGER, sender, 3, comm2d, status, ierr )
[298]	398	mask_k_global(mid,ind(5):ind(6)) = tmp_array(ind(5):ind(6))
	399	ENDIF
	400	ENDDO
	401
	402	ELSE
	403	!
	404	!-- If at least part of the mask resides on the PE, send the index limits
	405	!-- for the target array, otherwise send -9999 to PE0.
[996]	406	IF ( mask_size_l(mid,1) > 0 .AND. mask_size_l(mid,2) > 0 .AND. &
	407	mask_size_l(mid,3) > 0 ) THEN
[298]	408	ind(1) = mask_start_l(mid,1)
	409	ind(2) = mask_start_l(mid,1) + mask_size_l(mid,1) - 1
	410	ind(3) = mask_start_l(mid,2)
	411	ind(4) = mask_start_l(mid,2) + mask_size_l(mid,2) - 1
	412	ind(5) = mask_start_l(mid,3)
	413	ind(6) = mask_start_l(mid,3) + mask_size_l(mid,3) - 1
	414	ELSE
	415	ind(1) = -9999; ind(2) = -9999
	416	ind(3) = -9999; ind(4) = -9999
	417	ind(5) = -9999; ind(6) = -9999
	418	ENDIF
	419	CALL MPI_SEND( ind(1), 6, MPI_INTEGER, 0, 0, comm2d, ierr )
	420	!
	421	!-- If applicable, send data to PE0.
	422	IF ( ind(1) /= -9999 ) THEN
	423	tmp_array(:mask_size_l(mid,1)) = mask_i(mid,:mask_size_l(mid,1))
	424	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,1), &
[363]	425	MPI_INTEGER, 0, 1, comm2d, ierr )
[298]	426	tmp_array(:mask_size_l(mid,2)) = mask_j(mid,:mask_size_l(mid,2))
	427	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,2), &
[363]	428	MPI_INTEGER, 0, 2, comm2d, ierr )
[298]	429	tmp_array(:mask_size_l(mid,3)) = mask_k(mid,:mask_size_l(mid,3))
	430	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,3), &
[363]	431	MPI_INTEGER, 0, 3, comm2d, ierr )
[298]	432	ENDIF
	433	ENDIF
	434	!
	435	!-- A barrier has to be set, because otherwise some PEs may proceed too fast
	436	!-- so that PE0 may receive wrong data on tag 0.
	437	CALL MPI_BARRIER( comm2d, ierr )
[409]	438
[1031]	439	IF ( netcdf_data_format > 4 ) THEN
[409]	440
[493]	441	CALL MPI_BCAST( mask_i_global(mid,:), nx+1, MPI_INTEGER, 0, comm2d, &
	442	ierr )
	443	CALL MPI_BCAST( mask_j_global(mid,:), ny+1, MPI_INTEGER, 0, comm2d, &
	444	ierr )
	445	CALL MPI_BCAST( mask_k_global(mid,:), nz+1, MPI_INTEGER, 0, comm2d, &
	446	ierr )
[409]	447
	448	ENDIF
[298]	449
[809]	450	#elif ! defined ( __parallel )
[298]	451	!
	452	!-- Local arrays can be relocated directly.
	453	mask_i_global(mid,:) = mask_i(mid,:)
	454	mask_j_global(mid,:) = mask_j(mid,:)
	455	mask_k_global(mid,:) = mask_k(mid,:)
	456	#endif
	457	ENDDO ! mid
	458
	459	DEALLOCATE( tmp_array )
	460	!
	461	!-- Internal mask arrays cannot be deallocated on PE 0 because they are
	462	!-- required for header output on PE 0.
	463	IF ( myid /= 0 ) DEALLOCATE( mask, mask_loop )
	464
	465	CONTAINS
[493]	466
[298]	467	SUBROUTINE set_mask_locations( dim, dxyz, dxyz_string, nxyz, nxyz_string, &
	468	lb, ub )
	469	!------------------------------------------------------------------------------!
	470	!
	471	! Description:
	472	! ------------
	473	! Set local mask for each subdomain along 'dim' direction.
	474	!------------------------------------------------------------------------------!
	475
	476	IMPLICIT NONE
	477
	478	CHARACTER (LEN=2) :: dxyz_string, nxyz_string
	479	INTEGER :: count, count_l, dim, m, loop_begin, loop_end, loop_stride, &
	480	lb, nxyz, ub
	481	REAL :: dxyz, ddxyz, tmp1, tmp2
	482
	483	count = 0; count_l = 0; ddxyz = 1.0 / dxyz; tmp1 = 0.0; tmp2 = 0.0
	484
	485	IF ( mask(mid,dim,1) >= 0.0 ) THEN
	486	!
	487	!-- use predefined mask_* array
	488	DO WHILE ( mask(mid,dim,count+1) >= 0.0 )
	489	count = count + 1
	490	IF ( dim == 1 .OR. dim == 2 ) THEN
[1032]	491	m = NINT( mask(mid,dim,count) * mask_scale(dim) * ddxyz - 0.5 )
[298]	492	ELSEIF ( dim == 3 ) THEN
	493	ind_array = &
[595]	494	MINLOC( ABS( mask(mid,dim,count) * mask_scale(dim) - zu ) )
[298]	495	m = ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
	496	ENDIF
	497	IF ( m > nxyz ) THEN
[303]	498	WRITE ( message_string, '(I3,A,I3,A,I1,3A,I3)' ) &
	499	m,' in mask ',mid,' along dimension ',dim, &
	500	' exceeds ',nxyz_string,' = ',nxyz
[564]	501	CALL message( 'init_masks', 'PA0331', 1, 2, 0, 6, 0 )
[298]	502	ENDIF
	503	IF ( m >= lb .AND. m <= ub ) THEN
	504	IF ( count_l == 0 ) mask_start_l(mid,dim) = count
	505	count_l = count_l + 1
	506	IF ( dim == 1 ) THEN
	507	mask_i(mid,count_l) = m
	508	ELSEIF ( dim == 2 ) THEN
	509	mask_j(mid,count_l) = m
	510	ELSEIF ( dim == 3 ) THEN
	511	mask_k(mid,count_l) = m
	512	ENDIF
	513	ENDIF
	514	IF ( count == mask_xyz_dimension ) EXIT
	515	ENDDO
	516	mask_size(mid,dim) = count
	517	mask_size_l(mid,dim) = count_l
	518
	519	ELSE
	520	!
	521	!-- use predefined mask_loop_* array, or use the default (all grid points
	522	!-- along this direction)
	523	IF ( mask_loop(mid,dim,1) < 0.0 ) THEN
	524	tmp1 = mask_loop(mid,dim,1)
	525	mask_loop(mid,dim,1) = 0.0 ! (default)
	526	ENDIF
	527	IF ( dim == 1 .OR. dim == 2 ) THEN
	528	IF ( mask_loop(mid,dim,2) < 0.0 ) THEN
	529	tmp2 = mask_loop(mid,dim,2)
[303]	530	mask_loop(mid,dim,2) = nxyz*dxyz / mask_scale(dim) ! (default)
[298]	531	ENDIF
	532	IF ( MAXVAL( mask_loop(mid,dim,1:2) ) &
[303]	533	> nxyz * dxyz / mask_scale(dim) ) THEN
	534	WRITE ( message_string, '(2(A,I3,A,I1,A,F9.3),5A,I1,A,F9.3)' ) &
	535	'mask_loop(',mid,',',dim,',1)=',mask_loop(mid,dim,1), &
	536	' and/or mask_loop(',mid,',',dim,',2)=', &
	537	mask_loop(mid,dim,2),'&exceed ', &
	538	nxyz_string,'*',dxyz_string,'/mask_scale(',dim,')=', &
	539	nxyz*dxyz/mask_scale(dim)
[564]	540	CALL message( 'init_masks', 'PA0332', 1, 2, 0, 6, 0 )
[298]	541	ENDIF
[1032]	542	loop_begin = NINT( mask_loop(mid,dim,1) * mask_scale(dim) &
	543	* ddxyz - 0.5 )
	544	loop_end = NINT( mask_loop(mid,dim,2) * mask_scale(dim) &
	545	* ddxyz - 0.5 )
	546	loop_stride = NINT( mask_loop(mid,dim,3) * mask_scale(dim) &
	547	* ddxyz )
[298]	548	ELSEIF ( dim == 3 ) THEN
	549	IF ( mask_loop(mid,dim,2) < 0.0 ) THEN
	550	tmp2 = mask_loop(mid,dim,2)
[595]	551	mask_loop(mid,dim,2) = zu(nz) / mask_scale(dim) ! (default)
[298]	552	ENDIF
	553	IF ( MAXVAL( mask_loop(mid,dim,1:2) ) &
[595]	554	> zu(nz) / mask_scale(dim) ) THEN
[303]	555	WRITE ( message_string, '(2(A,I3,A,I1,A,F9.3),A,I1,A,F9.3)' ) &
	556	'mask_loop(',mid,',',dim,',1)=',mask_loop(mid,dim,1), &
	557	' and/or mask_loop(',mid,',',dim,',2)=', &
[595]	558	mask_loop(mid,dim,2),'&exceed zu(nz)/mask_scale(',dim, &
	559	')=',zu(nz)/mask_scale(dim)
[564]	560	CALL message( 'init_masks', 'PA0333', 1, 2, 0, 6, 0 )
[298]	561	ENDIF
[303]	562	ind_array = &
[595]	563	MINLOC( ABS( mask_loop(mid,dim,1) * mask_scale(dim) - zu ) )
[298]	564	loop_begin = &
[303]	565	ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
	566	ind_array = &
[595]	567	MINLOC( ABS( mask_loop(mid,dim,2) * mask_scale(dim) - zu ) )
[298]	568	loop_end = ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
	569	!
[303]	570	!-- The following line assumes a constant vertical grid spacing within
	571	!-- the vertical mask range; it fails for vertical grid stretching.
	572	!-- Maybe revise later. Issue warning but continue execution.
	573	loop_stride = NINT( mask_loop(mid,dim,3) * mask_scale(dim) * ddxyz )
	574
	575	IF ( mask_loop(mid,dim,2) * mask_scale(dim) > dz_stretch_level ) &
	576	THEN
[557]	577	WRITE ( message_string, '(A,I3,A,I1,A,F9.3,A,F8.2,3A)' ) &
	578	'mask_loop(',mid,',',dim,',2)=', mask_loop(mid,dim,2),&
[303]	579	' exceeds dz_stretch_level=',dz_stretch_level, &
	580	'.&Vertical mask locations will not ', &
	581	'match the desired heights&within the stretching ', &
	582	'region. Recommendation: use mask instead of mask_loop.'
[564]	583	CALL message( 'init_masks', 'PA0334', 0, 1, 0, 6, 0 )
[303]	584	ENDIF
	585
[298]	586	ENDIF
	587	!
	588	!-- If necessary, reset mask_loop(mid,dim,1) and mask_loop(mid,dim,2).
	589	IF ( tmp1 < 0.0 ) mask_loop(mid,dim,1) = tmp1
	590	IF ( tmp2 < 0.0 ) mask_loop(mid,dim,2) = tmp2
	591	!
	592	!-- The default stride +/-1 (every grid point) applies if
	593	!-- mask_loop(mid,dim,3) is not specified (its default is zero).
	594	IF ( loop_stride == 0 ) THEN
	595	IF ( loop_end >= loop_begin ) THEN
	596	loop_stride = 1
	597	ELSE
	598	loop_stride = -1
	599	ENDIF
	600	ENDIF
	601	DO m = loop_begin, loop_end, loop_stride
	602	count = count + 1
[996]	603	IF ( m >= lb .AND. m <= ub ) 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	ENDDO
	615	mask_size(mid,dim) = count
	616	mask_size_l(mid,dim) = count_l
	617	ENDIF
	618
	619	END SUBROUTINE set_mask_locations
	620
	621	END SUBROUTINE init_masks

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