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source: palm/trunk/SOURCE/init_masks.f90 @ 1186

Last change on this file since 1186 was 1186, checked in by raasch, 11 years ago
bugfix: 0.0 replaced by zu(nzb) as the lowest default height level for masks, because a zero value does not work in case of ocean runs
Property svn:keywords set to `Id`
File size: 24.4 KB

Rev	Line
[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	! -----------------
[1186]	22	! bugfix: 0.0 replaced by zu(nzb) as the lowest default height level for masks,
	23	! because a zero value does not work in case of ocean runs
[298]	24	!
	25	! Former revisions:
	26	! -----------------
	27	! $Id: init_masks.f90 1186 2013-06-18 06:22:52Z raasch $
	28	!
[1037]	29	! 1036 2012-10-22 13:43:42Z raasch
	30	! code put under GPL (PALM 3.9)
	31	!
[1033]	32	! 1032 2012-10-21 13:03:21Z letzel
	33	! mask locations determined based on scalar positions
	34	!
[1035]	35	! 1031 2012-10-19 14:35:30Z raasch
	36	! netCDF4 without parallel file support implemented
	37	!
[997]	38	! 996 2012-09-07 10:41:47Z raasch
	39	! little reformatting
	40	!
[979]	41	! 978 2012-08-09 08:28:32Z fricke
	42	! +z0h*
	43	!
[810]	44	! 809 2012-01-30 13:32:58Z maronga
	45	! Bugfix: replaced .AND. and .NOT. with && and ! in the preprocessor directives
	46	!
[808]	47	! 807 2012-01-25 11:53:51Z maronga
	48	! New cpp directive "__check" implemented which is used by check_namelist_files
	49	!
[772]	50	! 771 2011-10-27 10:56:21Z heinze
	51	! +lpt
	52	!
[596]	53	! 595 2010-11-12 09:52:10Z helmke
	54	! Calculation of z locations for masked output changed
	55	!
[565]	56	! 564 2010-09-30 13:18:59Z helmke
	57	! assignment of mask_xyz_loop added, palm message identifiers of masked output
	58	! changed
[1186]	59	!/localdata/raasch.14299
[558]	60	! 557 2010-09-07 14:50:07Z weinreis
	61	! bugfix message string in set_mask_locations
	62	!
[554]	63	! 553 2010-09-01 14:09:06Z weinreis
	64	! parameters for masked output are replaced by arrays
	65	!
[494]	66	! 493 2010-03-01 08:30:24Z raasch
	67	! netcdf_format_mask* and format_parallel_io replaced by netcdf_data_format
	68	!
[449]	69	! 410 2009-12-04 17:05:40Z letzel
	70	! Initial revision
[298]	71	!
[449]	72	!
[298]	73	! Description:
	74	! ------------
	75	! Initialize masked data output
	76	!------------------------------------------------------------------------------!
	77
	78	USE arrays_3d
	79	USE control_parameters
	80	USE grid_variables
	81	USE indices
	82	USE netcdf_control
	83	USE particle_attributes
	84	USE pegrid
	85
	86	IMPLICIT NONE
	87
	88	CHARACTER (LEN=6) :: var
	89	CHARACTER (LEN=7) :: unit
	90	CHARACTER (LEN=10), DIMENSION(max_masks,100) :: do_mask, do_mask_user
	91
	92	INTEGER :: i, ilen, ind(6), ind_array(1), j, k, n, sender
	93	INTEGER, DIMENSION(:), ALLOCATABLE :: tmp_array
	94
	95	LOGICAL :: found
	96	!
	97	!-- Allocation and initialization
	98	ALLOCATE( tmp_array( MAX(nx,ny,nz)+1 ) )
	99
	100	ALLOCATE( mask_i(max_masks,nxr-nxl+1), &
	101	mask_j(max_masks,nyn-nys+1), &
	102	mask_k(max_masks,nzt-nzb+1) )
	103	!
	104	!-- internal mask arrays ("mask,dimension,selection")
	105	ALLOCATE( mask(max_masks,3,mask_xyz_dimension), &
	106	mask_loop(max_masks,3,3) )
[493]	107
[298]	108	!
[493]	109	!-- Parallel mask output not yet tested
[1031]	110	IF ( netcdf_data_format > 4 ) THEN
[996]	111	message_string = 'netCDF file formats '// &
	112	'3 (netCDF 4) and 4 (netCDF 4 Classic model)'// &
[493]	113	'&are currently not supported (not yet tested).'
[564]	114	CALL message( 'init_masks', 'PA0328', 1, 2, 0, 6, 0 )
[298]	115	ENDIF
[553]	116
[298]	117	!
	118	!-- Store data output parameters for masked data output in few shared arrays
[996]	119	DO mid = 1, masks
[564]	120
[553]	121	do_mask (mid,:) = data_output_masks(mid,:)
	122	do_mask_user(mid,:) = data_output_masks_user(mid,:)
	123	mask (mid,1,:) = mask_x(mid,:)
	124	mask (mid,2,:) = mask_y(mid,:)
	125	mask (mid,3,:) = mask_z(mid,:)
[564]	126
[996]	127	IF ( mask_x_loop(mid,1) == -1.0 .AND. mask_x_loop(mid,2) == -1.0 &
	128	.AND. mask_x_loop(mid,3) == -1.0 ) THEN
	129	mask_loop(mid,1,1:2) = -1.0
[564]	130	mask_loop(mid,1,3) = 0.0
	131	ELSE
	132	mask_loop(mid,1,:) = mask_x_loop(mid,:)
	133	ENDIF
[996]	134	IF ( mask_y_loop(mid,1) == -1.0 .AND. mask_y_loop(mid,2) == -1.0 &
	135	.AND. mask_y_loop(mid,3) == -1.0 ) THEN
	136	mask_loop(mid,2,1:2) = -1.0
[564]	137	mask_loop(mid,2,3) = 0.0
	138	ELSE
	139	mask_loop(mid,2,:) = mask_y_loop(mid,:)
	140	ENDIF
[996]	141	IF ( mask_z_loop(mid,1) == -1.0 .AND. mask_z_loop(mid,2) == -1.0 &
	142	.AND. mask_z_loop(mid,3) == -1.0 ) THEN
	143	mask_loop(mid,3,1:2) = -1.0
[564]	144	mask_loop(mid,3,3) = 0.0
	145	ELSE
	146	mask_loop(mid,3,:) = mask_z_loop(mid,:)
	147	ENDIF
	148
[553]	149	ENDDO
	150
[298]	151	mask_i = -1; mask_j = -1; mask_k = -1
[553]	152
[298]	153	!
	154	!-- Global arrays are required by define_netcdf_header.
[1031]	155	IF ( myid == 0 .OR. netcdf_data_format > 4 ) THEN
[298]	156	ALLOCATE( mask_i_global(max_masks,nx+1), &
	157	mask_j_global(max_masks,ny+1), &
	158	mask_k_global(max_masks,nz+1) )
	159	mask_i_global = -1; mask_j_global = -1; mask_k_global = -1
	160	ENDIF
	161
	162	!
	163	!-- Determine variable names for each mask
	164	DO mid = 1, masks
	165	!
	166	!-- Append user-defined data output variables to the standard data output
	167	IF ( do_mask_user(mid,1) /= ' ' ) THEN
	168	i = 1
	169	DO WHILE ( do_mask(mid,i) /= ' ' .AND. i <= 100 )
	170	i = i + 1
	171	ENDDO
	172	j = 1
	173	DO WHILE ( do_mask_user(mid,j) /= ' ' .AND. j <= 100 )
	174	IF ( i > 100 ) THEN
	175	WRITE ( message_string, * ) 'number of output quantitities ', &
	176	'given by data_output_mask and data_output_mask_user ', &
	177	'exceeds the limit of 100'
[564]	178	CALL message( 'init_masks', 'PA0329', 1, 2, 0, 6, 0 )
[298]	179	ENDIF
	180	do_mask(mid,i) = do_mask_user(mid,j)
	181	i = i + 1
	182	j = j + 1
	183	ENDDO
	184	ENDIF
	185
	186	!
	187	!-- Check and set steering parameters for mask data output and averaging
	188	i = 1
[996]	189	DO WHILE ( do_mask(mid,i) /= ' ' .AND. i <= 100 )
[298]	190	!
	191	!-- Check for data averaging
	192	ilen = LEN_TRIM( do_mask(mid,i) )
	193	j = 0 ! no data averaging
	194	IF ( ilen > 3 ) THEN
	195	IF ( do_mask(mid,i)(ilen-2:ilen) == '_av' ) THEN
	196	j = 1 ! data averaging
	197	do_mask(mid,i) = do_mask(mid,i)(1:ilen-3)
	198	ENDIF
	199	ENDIF
	200	var = TRIM( do_mask(mid,i) )
	201	!
	202	!-- Check for allowed value and set units
	203	SELECT CASE ( TRIM( var ) )
	204
	205	CASE ( 'e' )
	206	IF ( constant_diffusion ) THEN
	207	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	208	'" requires constant_diffusion = .FALSE.'
[564]	209	CALL message( 'init_masks', 'PA0103', 1, 2, 0, 6, 0 )
[298]	210	ENDIF
	211	unit = 'm2/s2'
	212
[771]	213	CASE ( 'lpt' )
	214	IF ( .NOT. cloud_physics ) THEN
	215	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	216	'" requires cloud_physics = .TRUE.'
[773]	217	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
[771]	218	ENDIF
	219	unit = 'K'
	220
[298]	221	CASE ( 'pc', 'pr' )
	222	IF ( .NOT. particle_advection ) THEN
	223	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	224	'" requires a "particles_par"-NAMELIST in the ', &
	225	'parameter file (PARIN)'
[564]	226	CALL message( 'init_masks', 'PA0104', 1, 2, 0, 6, 0 )
[298]	227	ENDIF
	228	IF ( TRIM( var ) == 'pc' ) unit = 'number'
	229	IF ( TRIM( var ) == 'pr' ) unit = 'm'
	230
	231	CASE ( 'q', 'vpt' )
	232	IF ( .NOT. humidity ) THEN
	233	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	234	'" requires humidity = .TRUE.'
[564]	235	CALL message( 'init_masks', 'PA0105', 1, 2, 0, 6, 0 )
[298]	236	ENDIF
	237	IF ( TRIM( var ) == 'q' ) unit = 'kg/kg'
	238	IF ( TRIM( var ) == 'vpt' ) unit = 'K'
	239
	240	CASE ( 'ql' )
	241	IF ( .NOT. ( cloud_physics .OR. cloud_droplets ) ) THEN
	242	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	243	'" requires cloud_physics = .TRUE. or cloud_droplets', &
	244	' = .TRUE.'
[564]	245	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
[298]	246	ENDIF
	247	unit = 'kg/kg'
	248
	249	CASE ( 'ql_c', 'ql_v', 'ql_vp' )
	250	IF ( .NOT. cloud_droplets ) THEN
	251	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	252	'" requires cloud_droplets = .TRUE.'
[564]	253	CALL message( 'init_masks', 'PA0107', 1, 2, 0, 6, 0 )
[298]	254	ENDIF
	255	IF ( TRIM( var ) == 'ql_c' ) unit = 'kg/kg'
	256	IF ( TRIM( var ) == 'ql_v' ) unit = 'm3'
	257	IF ( TRIM( var ) == 'ql_vp' ) unit = 'none'
	258
	259	CASE ( 'qv' )
	260	IF ( .NOT. cloud_physics ) THEN
	261	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	262	'" requires cloud_physics = .TRUE.'
[564]	263	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
[298]	264	ENDIF
	265	unit = 'kg/kg'
	266
	267	CASE ( 'rho' )
	268	IF ( .NOT. ocean ) THEN
	269	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	270	'" requires ocean = .TRUE.'
[564]	271	CALL message( 'init_masks', 'PA0109', 1, 2, 0, 6, 0 )
[298]	272	ENDIF
	273	unit = 'kg/m3'
	274
	275	CASE ( 's' )
	276	IF ( .NOT. passive_scalar ) THEN
	277	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	278	'" requires passive_scalar = .TRUE.'
[564]	279	CALL message( 'init_masks', 'PA0110', 1, 2, 0, 6, 0 )
[298]	280	ENDIF
	281	unit = 'conc'
	282
	283	CASE ( 'sa' )
	284	IF ( .NOT. ocean ) THEN
	285	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	286	'" requires ocean = .TRUE.'
[564]	287	CALL message( 'init_masks', 'PA0109', 1, 2, 0, 6, 0 )
[298]	288	ENDIF
	289	unit = 'psu'
	290
[978]	291	CASE ( 'u', 't', 'lwp', 'pra', 'prr', 'z0', 'z0h*' )
[298]	292	WRITE ( message_string, * ) 'illegal value for data_',&
	293	'output: "', TRIM( var ), '" is only allowed', &
	294	'for horizontal cross section'
[564]	295	CALL message( 'init_masks', 'PA0111', 1, 2, 0, 6, 0 )
[298]	296
	297	CASE ( 'p', 'pt', 'u', 'v', 'w' )
	298	IF ( TRIM( var ) == 'p' ) unit = 'Pa'
	299	IF ( TRIM( var ) == 'pt' ) unit = 'K'
	300	IF ( TRIM( var ) == 'u' ) unit = 'm/s'
	301	IF ( TRIM( var ) == 'v' ) unit = 'm/s'
	302	IF ( TRIM( var ) == 'w' ) unit = 'm/s'
	303	CONTINUE
	304
	305	CASE DEFAULT
	306	CALL user_check_data_output( var, unit )
	307
	308	IF ( unit == 'illegal' ) THEN
	309	IF ( do_mask_user(mid,1) /= ' ' ) THEN
	310	WRITE ( message_string, * ) 'illegal value for data_',&
	311	'output or data_output_user: "', &
	312	TRIM( do_mask(mid,i) ), '"'
[564]	313	CALL message( 'init_masks', 'PA0114', 1, 2, 0, 6, 0 )
[298]	314	ELSE
	315	WRITE ( message_string, * ) 'illegal value for data_',&
	316	'output: "', TRIM( do_mask(mid,i) ), '"'
[564]	317	CALL message( 'init_masks', 'PA0330', 1, 2, 0, 6, 0 )
[298]	318	ENDIF
	319	ENDIF
	320
	321	END SELECT
	322	!
	323	!-- Set the internal steering parameters appropriately
	324	domask_no(mid,j) = domask_no(mid,j) + 1
	325	domask(mid,j,domask_no(mid,j)) = do_mask(mid,i)
	326	domask_unit(mid,j,domask_no(mid,j)) = unit
	327
	328	IF ( j == 1 ) THEN
	329	!
	330	!-- Check, if variable is already subject to averaging
	331	found = .FALSE.
	332	DO k = 1, doav_n
	333	IF ( TRIM( doav(k) ) == TRIM( var ) ) found = .TRUE.
	334	ENDDO
	335
	336	IF ( .NOT. found ) THEN
	337	doav_n = doav_n + 1
	338	doav(doav_n) = var
	339	ENDIF
	340	ENDIF
	341
	342	i = i + 1
	343
	344	ENDDO ! do_mask(mid,i)
	345	ENDDO ! mid
	346
	347
	348	!
	349	!-- Determine mask locations for each mask
	350	DO mid = 1, masks
	351	!
	352	!-- Set local masks for each subdomain along all three dimensions
	353	CALL set_mask_locations( 1, dx, 'dx', nx, 'nx', nxl, nxr )
	354	CALL set_mask_locations( 2, dy, 'dy', ny, 'ny', nys, nyn )
	355	CALL set_mask_locations( 3, dz, 'dz', nz, 'nz', nzb, nzt )
	356	!
	357	!-- Set global masks along all three dimensions (required by
	358	!-- define_netcdf_header).
[809]	359	#if defined( __parallel ) && ! defined ( __check )
[298]	360	!
	361	!-- PE0 receives partial arrays from all processors of the respective mask
	362	!-- and outputs them. Here a barrier has to be set, because otherwise
	363	!-- "-MPI- FATAL: Remote protocol queue full" may occur.
[807]	364
[298]	365	CALL MPI_BARRIER( comm2d, ierr )
	366
	367	IF ( myid == 0 ) THEN
	368	!
	369	!-- Local arrays can be relocated directly.
	370	mask_i_global(mid,mask_start_l(mid,1): &
	371	mask_start_l(mid,1)+mask_size_l(mid,1)-1) = &
	372	mask_i(mid,:mask_size_l(mid,1))
	373	mask_j_global(mid,mask_start_l(mid,2): &
	374	mask_start_l(mid,2)+mask_size_l(mid,2)-1) = &
	375	mask_j(mid,:mask_size_l(mid,2))
	376	mask_k_global(mid,mask_start_l(mid,3): &
	377	mask_start_l(mid,3)+mask_size_l(mid,3)-1) = &
	378	mask_k(mid,:mask_size_l(mid,3))
	379	!
	380	!-- Receive data from all other PEs.
	381	DO n = 1, numprocs-1
	382	!
	383	!-- Receive index limits first, then arrays.
	384	!-- Index limits are received in arbitrary order from the PEs.
	385	CALL MPI_RECV( ind(1), 6, MPI_INTEGER, MPI_ANY_SOURCE, 0, &
	386	comm2d, status, ierr )
	387	!
	388	!-- Not all PEs have data for the mask.
	389	IF ( ind(1) /= -9999 ) THEN
	390	sender = status(MPI_SOURCE)
	391	CALL MPI_RECV( tmp_array(ind(1)), ind(2)-ind(1)+1, &
[363]	392	MPI_INTEGER, sender, 1, comm2d, status, ierr )
[298]	393	mask_i_global(mid,ind(1):ind(2)) = tmp_array(ind(1):ind(2))
	394	CALL MPI_RECV( tmp_array(ind(3)), ind(4)-ind(3)+1, &
[363]	395	MPI_INTEGER, sender, 2, comm2d, status, ierr )
[298]	396	mask_j_global(mid,ind(3):ind(4)) = tmp_array(ind(3):ind(4))
	397	CALL MPI_RECV( tmp_array(ind(5)), ind(6)-ind(5)+1, &
[363]	398	MPI_INTEGER, sender, 3, comm2d, status, ierr )
[298]	399	mask_k_global(mid,ind(5):ind(6)) = tmp_array(ind(5):ind(6))
	400	ENDIF
	401	ENDDO
	402
	403	ELSE
	404	!
	405	!-- If at least part of the mask resides on the PE, send the index limits
	406	!-- for the target array, otherwise send -9999 to PE0.
[996]	407	IF ( mask_size_l(mid,1) > 0 .AND. mask_size_l(mid,2) > 0 .AND. &
	408	mask_size_l(mid,3) > 0 ) THEN
[298]	409	ind(1) = mask_start_l(mid,1)
	410	ind(2) = mask_start_l(mid,1) + mask_size_l(mid,1) - 1
	411	ind(3) = mask_start_l(mid,2)
	412	ind(4) = mask_start_l(mid,2) + mask_size_l(mid,2) - 1
	413	ind(5) = mask_start_l(mid,3)
	414	ind(6) = mask_start_l(mid,3) + mask_size_l(mid,3) - 1
	415	ELSE
	416	ind(1) = -9999; ind(2) = -9999
	417	ind(3) = -9999; ind(4) = -9999
	418	ind(5) = -9999; ind(6) = -9999
	419	ENDIF
	420	CALL MPI_SEND( ind(1), 6, MPI_INTEGER, 0, 0, comm2d, ierr )
	421	!
	422	!-- If applicable, send data to PE0.
	423	IF ( ind(1) /= -9999 ) THEN
	424	tmp_array(:mask_size_l(mid,1)) = mask_i(mid,:mask_size_l(mid,1))
	425	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,1), &
[363]	426	MPI_INTEGER, 0, 1, comm2d, ierr )
[298]	427	tmp_array(:mask_size_l(mid,2)) = mask_j(mid,:mask_size_l(mid,2))
	428	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,2), &
[363]	429	MPI_INTEGER, 0, 2, comm2d, ierr )
[298]	430	tmp_array(:mask_size_l(mid,3)) = mask_k(mid,:mask_size_l(mid,3))
	431	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,3), &
[363]	432	MPI_INTEGER, 0, 3, comm2d, ierr )
[298]	433	ENDIF
	434	ENDIF
	435	!
	436	!-- A barrier has to be set, because otherwise some PEs may proceed too fast
	437	!-- so that PE0 may receive wrong data on tag 0.
	438	CALL MPI_BARRIER( comm2d, ierr )
[409]	439
[1031]	440	IF ( netcdf_data_format > 4 ) THEN
[409]	441
[493]	442	CALL MPI_BCAST( mask_i_global(mid,:), nx+1, MPI_INTEGER, 0, comm2d, &
	443	ierr )
	444	CALL MPI_BCAST( mask_j_global(mid,:), ny+1, MPI_INTEGER, 0, comm2d, &
	445	ierr )
	446	CALL MPI_BCAST( mask_k_global(mid,:), nz+1, MPI_INTEGER, 0, comm2d, &
	447	ierr )
[409]	448
	449	ENDIF
[298]	450
[809]	451	#elif ! defined ( __parallel )
[298]	452	!
	453	!-- Local arrays can be relocated directly.
	454	mask_i_global(mid,:) = mask_i(mid,:)
	455	mask_j_global(mid,:) = mask_j(mid,:)
	456	mask_k_global(mid,:) = mask_k(mid,:)
	457	#endif
	458	ENDDO ! mid
	459
	460	DEALLOCATE( tmp_array )
	461	!
	462	!-- Internal mask arrays cannot be deallocated on PE 0 because they are
	463	!-- required for header output on PE 0.
	464	IF ( myid /= 0 ) DEALLOCATE( mask, mask_loop )
	465
	466	CONTAINS
[493]	467
[298]	468	SUBROUTINE set_mask_locations( dim, dxyz, dxyz_string, nxyz, nxyz_string, &
	469	lb, ub )
	470	!------------------------------------------------------------------------------!
	471	!
	472	! Description:
	473	! ------------
	474	! Set local mask for each subdomain along 'dim' direction.
	475	!------------------------------------------------------------------------------!
	476
	477	IMPLICIT NONE
	478
	479	CHARACTER (LEN=2) :: dxyz_string, nxyz_string
	480	INTEGER :: count, count_l, dim, m, loop_begin, loop_end, loop_stride, &
	481	lb, nxyz, ub
	482	REAL :: dxyz, ddxyz, tmp1, tmp2
	483
	484	count = 0; count_l = 0; ddxyz = 1.0 / dxyz; tmp1 = 0.0; tmp2 = 0.0
	485
	486	IF ( mask(mid,dim,1) >= 0.0 ) THEN
	487	!
	488	!-- use predefined mask_* array
	489	DO WHILE ( mask(mid,dim,count+1) >= 0.0 )
	490	count = count + 1
	491	IF ( dim == 1 .OR. dim == 2 ) THEN
[1032]	492	m = NINT( mask(mid,dim,count) * mask_scale(dim) * ddxyz - 0.5 )
[298]	493	ELSEIF ( dim == 3 ) THEN
	494	ind_array = &
[595]	495	MINLOC( ABS( mask(mid,dim,count) * mask_scale(dim) - zu ) )
[298]	496	m = ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
	497	ENDIF
	498	IF ( m > nxyz ) THEN
[303]	499	WRITE ( message_string, '(I3,A,I3,A,I1,3A,I3)' ) &
	500	m,' in mask ',mid,' along dimension ',dim, &
	501	' exceeds ',nxyz_string,' = ',nxyz
[564]	502	CALL message( 'init_masks', 'PA0331', 1, 2, 0, 6, 0 )
[298]	503	ENDIF
	504	IF ( m >= lb .AND. m <= ub ) THEN
	505	IF ( count_l == 0 ) mask_start_l(mid,dim) = count
	506	count_l = count_l + 1
	507	IF ( dim == 1 ) THEN
	508	mask_i(mid,count_l) = m
	509	ELSEIF ( dim == 2 ) THEN
	510	mask_j(mid,count_l) = m
	511	ELSEIF ( dim == 3 ) THEN
	512	mask_k(mid,count_l) = m
	513	ENDIF
	514	ENDIF
	515	IF ( count == mask_xyz_dimension ) EXIT
	516	ENDDO
	517	mask_size(mid,dim) = count
	518	mask_size_l(mid,dim) = count_l
	519
	520	ELSE
	521	!
	522	!-- use predefined mask_loop_* array, or use the default (all grid points
	523	!-- along this direction)
	524	IF ( mask_loop(mid,dim,1) < 0.0 ) THEN
	525	tmp1 = mask_loop(mid,dim,1)
[1186]	526	mask_loop(mid,dim,1) = zw(nzb) ! lowest level (default)
[298]	527	ENDIF
	528	IF ( dim == 1 .OR. dim == 2 ) THEN
	529	IF ( mask_loop(mid,dim,2) < 0.0 ) THEN
	530	tmp2 = mask_loop(mid,dim,2)
[303]	531	mask_loop(mid,dim,2) = nxyz*dxyz / mask_scale(dim) ! (default)
[298]	532	ENDIF
	533	IF ( MAXVAL( mask_loop(mid,dim,1:2) ) &
[303]	534	> nxyz * dxyz / mask_scale(dim) ) THEN
	535	WRITE ( message_string, '(2(A,I3,A,I1,A,F9.3),5A,I1,A,F9.3)' ) &
	536	'mask_loop(',mid,',',dim,',1)=',mask_loop(mid,dim,1), &
	537	' and/or mask_loop(',mid,',',dim,',2)=', &
	538	mask_loop(mid,dim,2),'&exceed ', &
	539	nxyz_string,'*',dxyz_string,'/mask_scale(',dim,')=', &
	540	nxyz*dxyz/mask_scale(dim)
[564]	541	CALL message( 'init_masks', 'PA0332', 1, 2, 0, 6, 0 )
[298]	542	ENDIF
[1032]	543	loop_begin = NINT( mask_loop(mid,dim,1) * mask_scale(dim) &
	544	* ddxyz - 0.5 )
	545	loop_end = NINT( mask_loop(mid,dim,2) * mask_scale(dim) &
	546	* ddxyz - 0.5 )
	547	loop_stride = NINT( mask_loop(mid,dim,3) * mask_scale(dim) &
	548	* ddxyz )
[298]	549	ELSEIF ( dim == 3 ) THEN
	550	IF ( mask_loop(mid,dim,2) < 0.0 ) THEN
	551	tmp2 = mask_loop(mid,dim,2)
[595]	552	mask_loop(mid,dim,2) = zu(nz) / mask_scale(dim) ! (default)
[298]	553	ENDIF
	554	IF ( MAXVAL( mask_loop(mid,dim,1:2) ) &
[595]	555	> zu(nz) / mask_scale(dim) ) THEN
[303]	556	WRITE ( message_string, '(2(A,I3,A,I1,A,F9.3),A,I1,A,F9.3)' ) &
	557	'mask_loop(',mid,',',dim,',1)=',mask_loop(mid,dim,1), &
	558	' and/or mask_loop(',mid,',',dim,',2)=', &
[595]	559	mask_loop(mid,dim,2),'&exceed zu(nz)/mask_scale(',dim, &
	560	')=',zu(nz)/mask_scale(dim)
[564]	561	CALL message( 'init_masks', 'PA0333', 1, 2, 0, 6, 0 )
[298]	562	ENDIF
[303]	563	ind_array = &
[595]	564	MINLOC( ABS( mask_loop(mid,dim,1) * mask_scale(dim) - zu ) )
[298]	565	loop_begin = &
[303]	566	ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
	567	ind_array = &
[595]	568	MINLOC( ABS( mask_loop(mid,dim,2) * mask_scale(dim) - zu ) )
[298]	569	loop_end = ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
	570	!
[303]	571	!-- The following line assumes a constant vertical grid spacing within
	572	!-- the vertical mask range; it fails for vertical grid stretching.
	573	!-- Maybe revise later. Issue warning but continue execution.
	574	loop_stride = NINT( mask_loop(mid,dim,3) * mask_scale(dim) * ddxyz )
	575
	576	IF ( mask_loop(mid,dim,2) * mask_scale(dim) > dz_stretch_level ) &
	577	THEN
[557]	578	WRITE ( message_string, '(A,I3,A,I1,A,F9.3,A,F8.2,3A)' ) &
	579	'mask_loop(',mid,',',dim,',2)=', mask_loop(mid,dim,2),&
[303]	580	' exceeds dz_stretch_level=',dz_stretch_level, &
	581	'.&Vertical mask locations will not ', &
	582	'match the desired heights&within the stretching ', &
	583	'region. Recommendation: use mask instead of mask_loop.'
[564]	584	CALL message( 'init_masks', 'PA0334', 0, 1, 0, 6, 0 )
[303]	585	ENDIF
	586
[298]	587	ENDIF
	588	!
	589	!-- If necessary, reset mask_loop(mid,dim,1) and mask_loop(mid,dim,2).
	590	IF ( tmp1 < 0.0 ) mask_loop(mid,dim,1) = tmp1
	591	IF ( tmp2 < 0.0 ) mask_loop(mid,dim,2) = tmp2
	592	!
	593	!-- The default stride +/-1 (every grid point) applies if
	594	!-- mask_loop(mid,dim,3) is not specified (its default is zero).
	595	IF ( loop_stride == 0 ) THEN
	596	IF ( loop_end >= loop_begin ) THEN
	597	loop_stride = 1
	598	ELSE
	599	loop_stride = -1
	600	ENDIF
	601	ENDIF
	602	DO m = loop_begin, loop_end, loop_stride
	603	count = count + 1
[996]	604	IF ( m >= lb .AND. m <= ub ) THEN
[298]	605	IF ( count_l == 0 ) mask_start_l(mid,dim) = count
	606	count_l = count_l + 1
	607	IF ( dim == 1 ) THEN
	608	mask_i(mid,count_l) = m
	609	ELSEIF ( dim == 2 ) THEN
	610	mask_j(mid,count_l) = m
	611	ELSEIF ( dim == 3 ) THEN
	612	mask_k(mid,count_l) = m
	613	ENDIF
	614	ENDIF
	615	ENDDO
	616	mask_size(mid,dim) = count
	617	mask_size_l(mid,dim) = count_l
	618	ENDIF
	619
	620	END SUBROUTINE set_mask_locations
	621
	622	END SUBROUTINE init_masks

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