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source: palm/trunk/SOURCE/init_masks.f90 @ 583

Last change on this file since 583 was 565, checked in by helmke, 14 years ago
last commit documented
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File size: 23.9 KB

Rev	Line
[298]	1	SUBROUTINE init_masks
	2
	3	!------------------------------------------------------------------------------!
[484]	4	! Current revisions:
[298]	5	! -----------------
	6	!
[565]	7	!
[298]	8	! Former revisions:
	9	! -----------------
	10	! $Id: init_masks.f90 565 2010-09-30 13:34:53Z heinze $
	11	!
[565]	12	! 564 2010-09-30 13:18:59Z helmke
	13	! assignment of mask_xyz_loop added, palm message identifiers of masked output
	14	! changed
	15	!
[558]	16	! 557 2010-09-07 14:50:07Z weinreis
	17	! bugfix message string in set_mask_locations
	18	!
[554]	19	! 553 2010-09-01 14:09:06Z weinreis
	20	! parameters for masked output are replaced by arrays
	21	!
[494]	22	! 493 2010-03-01 08:30:24Z raasch
	23	! netcdf_format_mask* and format_parallel_io replaced by netcdf_data_format
	24	!
[449]	25	! 410 2009-12-04 17:05:40Z letzel
	26	! Initial revision
[298]	27	!
[449]	28	!
[298]	29	! Description:
	30	! ------------
	31	! Initialize masked data output
	32	!------------------------------------------------------------------------------!
	33
	34	USE arrays_3d
	35	USE control_parameters
	36	USE grid_variables
	37	USE indices
	38	USE netcdf_control
	39	USE particle_attributes
	40	USE pegrid
	41
	42	IMPLICIT NONE
	43
	44	CHARACTER (LEN=6) :: var
	45	CHARACTER (LEN=7) :: unit
	46	CHARACTER (LEN=10), DIMENSION(max_masks,100) :: do_mask, do_mask_user
	47
	48	INTEGER :: i, ilen, ind(6), ind_array(1), j, k, n, sender
	49	INTEGER, DIMENSION(:), ALLOCATABLE :: tmp_array
	50
	51	LOGICAL :: found
	52	!
	53	!-- Allocation and initialization
	54	ALLOCATE( tmp_array( MAX(nx,ny,nz)+1 ) )
	55
	56	ALLOCATE( mask_i(max_masks,nxr-nxl+1), &
	57	mask_j(max_masks,nyn-nys+1), &
	58	mask_k(max_masks,nzt-nzb+1) )
	59	!
	60	!-- internal mask arrays ("mask,dimension,selection")
	61	ALLOCATE( mask(max_masks,3,mask_xyz_dimension), &
	62	mask_loop(max_masks,3,3) )
[493]	63
[298]	64	!
[493]	65	!-- Parallel mask output not yet tested
	66	IF ( netcdf_data_format > 2 ) THEN
	67	message_string = 'NetCDF file formats '// &
	68	'3 (NetCDF 4) and 4 (NetCDF 4 Classic model)'// &
	69	'&are currently not supported (not yet tested).'
[564]	70	CALL message( 'init_masks', 'PA0328', 1, 2, 0, 6, 0 )
[298]	71	ENDIF
[553]	72
[298]	73	!
	74	!-- Store data output parameters for masked data output in few shared arrays
[553]	75	DO mid = 1, masks
[564]	76
[553]	77	do_mask (mid,:) = data_output_masks(mid,:)
	78	do_mask_user(mid,:) = data_output_masks_user(mid,:)
	79	mask (mid,1,:) = mask_x(mid,:)
	80	mask (mid,2,:) = mask_y(mid,:)
	81	mask (mid,3,:) = mask_z(mid,:)
[564]	82
	83	IF ( mask_x_loop(mid,1) == -1.0 .AND. mask_x_loop(mid,2) == -1.0 &
	84	.AND. mask_x_loop(mid,3) == -1.0 ) THEN
	85	mask_loop(mid,1,1:2) = -1.0
	86	mask_loop(mid,1,3) = 0.0
	87	ELSE
	88	mask_loop(mid,1,:) = mask_x_loop(mid,:)
	89	ENDIF
	90	IF ( mask_y_loop(mid,1) == -1.0 .AND. mask_y_loop(mid,2) == -1.0 &
	91	.AND. mask_y_loop(mid,3) == -1.0 ) THEN
	92	mask_loop(mid,2,1:2) = -1.0
	93	mask_loop(mid,2,3) = 0.0
	94	ELSE
	95	mask_loop(mid,2,:) = mask_y_loop(mid,:)
	96	ENDIF
	97	IF ( mask_z_loop(mid,1) == -1.0 .AND. mask_z_loop(mid,2) == -1.0 &
	98	.AND. mask_z_loop(mid,3) == -1.0 ) THEN
	99	mask_loop(mid,3,1:2) = -1.0
	100	mask_loop(mid,3,3) = 0.0
	101	ELSE
	102	mask_loop(mid,3,:) = mask_z_loop(mid,:)
	103	ENDIF
	104
[553]	105	ENDDO
	106
[298]	107	mask_i = -1; mask_j = -1; mask_k = -1
[553]	108
[298]	109	!
	110	!-- Global arrays are required by define_netcdf_header.
[493]	111	IF ( myid == 0 .OR. netcdf_data_format > 2 ) THEN
[298]	112	ALLOCATE( mask_i_global(max_masks,nx+1), &
	113	mask_j_global(max_masks,ny+1), &
	114	mask_k_global(max_masks,nz+1) )
	115	mask_i_global = -1; mask_j_global = -1; mask_k_global = -1
	116	ENDIF
	117
	118	!
	119	!-- Determine variable names for each mask
	120	DO mid = 1, masks
	121	!
	122	!-- Append user-defined data output variables to the standard data output
	123	IF ( do_mask_user(mid,1) /= ' ' ) THEN
	124	i = 1
	125	DO WHILE ( do_mask(mid,i) /= ' ' .AND. i <= 100 )
	126	i = i + 1
	127	ENDDO
	128	j = 1
	129	DO WHILE ( do_mask_user(mid,j) /= ' ' .AND. j <= 100 )
	130	IF ( i > 100 ) THEN
	131	WRITE ( message_string, * ) 'number of output quantitities ', &
	132	'given by data_output_mask and data_output_mask_user ', &
	133	'exceeds the limit of 100'
[564]	134	CALL message( 'init_masks', 'PA0329', 1, 2, 0, 6, 0 )
[298]	135	ENDIF
	136	do_mask(mid,i) = do_mask_user(mid,j)
	137	i = i + 1
	138	j = j + 1
	139	ENDDO
	140	ENDIF
	141
	142	!
	143	!-- Check and set steering parameters for mask data output and averaging
	144	i = 1
	145	DO WHILE ( do_mask(mid,i) /= ' ' .AND. i <= 100 )
	146	!
	147	!-- Check for data averaging
	148	ilen = LEN_TRIM( do_mask(mid,i) )
	149	j = 0 ! no data averaging
	150	IF ( ilen > 3 ) THEN
	151	IF ( do_mask(mid,i)(ilen-2:ilen) == '_av' ) THEN
	152	j = 1 ! data averaging
	153	do_mask(mid,i) = do_mask(mid,i)(1:ilen-3)
	154	ENDIF
	155	ENDIF
	156	var = TRIM( do_mask(mid,i) )
	157	!
	158	!-- Check for allowed value and set units
	159	SELECT CASE ( TRIM( var ) )
	160
	161	CASE ( 'e' )
	162	IF ( constant_diffusion ) THEN
	163	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	164	'" requires constant_diffusion = .FALSE.'
[564]	165	CALL message( 'init_masks', 'PA0103', 1, 2, 0, 6, 0 )
[298]	166	ENDIF
	167	unit = 'm2/s2'
	168
	169	CASE ( 'pc', 'pr' )
	170	IF ( .NOT. particle_advection ) THEN
	171	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	172	'" requires a "particles_par"-NAMELIST in the ', &
	173	'parameter file (PARIN)'
[564]	174	CALL message( 'init_masks', 'PA0104', 1, 2, 0, 6, 0 )
[298]	175	ENDIF
	176	IF ( TRIM( var ) == 'pc' ) unit = 'number'
	177	IF ( TRIM( var ) == 'pr' ) unit = 'm'
	178
	179	CASE ( 'q', 'vpt' )
	180	IF ( .NOT. humidity ) THEN
	181	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	182	'" requires humidity = .TRUE.'
[564]	183	CALL message( 'init_masks', 'PA0105', 1, 2, 0, 6, 0 )
[298]	184	ENDIF
	185	IF ( TRIM( var ) == 'q' ) unit = 'kg/kg'
	186	IF ( TRIM( var ) == 'vpt' ) unit = 'K'
	187
	188	CASE ( 'ql' )
	189	IF ( .NOT. ( cloud_physics .OR. cloud_droplets ) ) THEN
	190	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	191	'" requires cloud_physics = .TRUE. or cloud_droplets', &
	192	' = .TRUE.'
[564]	193	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
[298]	194	ENDIF
	195	unit = 'kg/kg'
	196
	197	CASE ( 'ql_c', 'ql_v', 'ql_vp' )
	198	IF ( .NOT. cloud_droplets ) THEN
	199	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	200	'" requires cloud_droplets = .TRUE.'
[564]	201	CALL message( 'init_masks', 'PA0107', 1, 2, 0, 6, 0 )
[298]	202	ENDIF
	203	IF ( TRIM( var ) == 'ql_c' ) unit = 'kg/kg'
	204	IF ( TRIM( var ) == 'ql_v' ) unit = 'm3'
	205	IF ( TRIM( var ) == 'ql_vp' ) unit = 'none'
	206
	207	CASE ( 'qv' )
	208	IF ( .NOT. cloud_physics ) THEN
	209	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	210	'" requires cloud_physics = .TRUE.'
[564]	211	CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
[298]	212	ENDIF
	213	unit = 'kg/kg'
	214
	215	CASE ( 'rho' )
	216	IF ( .NOT. ocean ) THEN
	217	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	218	'" requires ocean = .TRUE.'
[564]	219	CALL message( 'init_masks', 'PA0109', 1, 2, 0, 6, 0 )
[298]	220	ENDIF
	221	unit = 'kg/m3'
	222
	223	CASE ( 's' )
	224	IF ( .NOT. passive_scalar ) THEN
	225	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	226	'" requires passive_scalar = .TRUE.'
[564]	227	CALL message( 'init_masks', 'PA0110', 1, 2, 0, 6, 0 )
[298]	228	ENDIF
	229	unit = 'conc'
	230
	231	CASE ( 'sa' )
	232	IF ( .NOT. ocean ) THEN
	233	WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	234	'" requires ocean = .TRUE.'
[564]	235	CALL message( 'init_masks', 'PA0109', 1, 2, 0, 6, 0 )
[298]	236	ENDIF
	237	unit = 'psu'
	238
	239	CASE ( 'u', 't', 'lwp', 'pra', 'prr', 'z0' )
	240	WRITE ( message_string, * ) 'illegal value for data_',&
	241	'output: "', TRIM( var ), '" is only allowed', &
	242	'for horizontal cross section'
[564]	243	CALL message( 'init_masks', 'PA0111', 1, 2, 0, 6, 0 )
[298]	244	! IF ( TRIM( var ) == 'lwp*' .AND. .NOT. cloud_physics ) THEN
	245	! WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	246	! '" requires cloud_physics = .TRUE.'
[564]	247	! CALL message( 'init_masks', 'PA0108', 1, 2, 0, 6, 0 )
[298]	248	! ENDIF
	249	! IF ( TRIM( var ) == 'pra*' .AND. .NOT. precipitation ) THEN
	250	! WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	251	! '" requires precipitation = .TRUE.'
[564]	252	! CALL message( 'init_masks', 'PA0112', 1, 2, 0, 6, 0 )
[298]	253	! ENDIF
	254	! IF ( TRIM( var ) == 'pra*' .AND. j == 1 ) THEN
	255	! WRITE ( message_string, * ) 'temporal averaging of ', &
	256	! ' precipitation amount "', TRIM( var ), &
	257	! '" not possible'
[564]	258	! CALL message( 'init_masks', 'PA0113', 1, 2, 0, 6, 0 )
[298]	259	! ENDIF
	260	! IF ( TRIM( var ) == 'prr*' .AND. .NOT. precipitation ) THEN
	261	! WRITE ( message_string, * ) 'output of "', TRIM( var ), &
	262	! '" requires precipitation = .TRUE.'
[564]	263	! CALL message( 'init_masks', 'PA0112', 1, 2, 0, 6, 0 )
[298]	264	! ENDIF
	265	!
	266	! IF ( TRIM( var ) == 'u*' ) unit = 'm/s'
	267	! IF ( TRIM( var ) == 't*' ) unit = 'K'
	268	! IF ( TRIM( var ) == 'lwp' ) unit = 'kg/kgm'
	269	! IF ( TRIM( var ) == 'pra*' ) unit = 'mm'
	270	! IF ( TRIM( var ) == 'prr*' ) unit = 'mm/s'
	271	! IF ( TRIM( var ) == 'z0*' ) unit = 'm'
	272
	273	CASE ( 'p', 'pt', 'u', 'v', 'w' )
	274	IF ( TRIM( var ) == 'p' ) unit = 'Pa'
	275	IF ( TRIM( var ) == 'pt' ) unit = 'K'
	276	IF ( TRIM( var ) == 'u' ) unit = 'm/s'
	277	IF ( TRIM( var ) == 'v' ) unit = 'm/s'
	278	IF ( TRIM( var ) == 'w' ) unit = 'm/s'
	279	CONTINUE
	280
	281	CASE DEFAULT
	282	CALL user_check_data_output( var, unit )
	283
	284	IF ( unit == 'illegal' ) THEN
	285	IF ( do_mask_user(mid,1) /= ' ' ) THEN
	286	WRITE ( message_string, * ) 'illegal value for data_',&
	287	'output or data_output_user: "', &
	288	TRIM( do_mask(mid,i) ), '"'
[564]	289	CALL message( 'init_masks', 'PA0114', 1, 2, 0, 6, 0 )
[298]	290	ELSE
	291	WRITE ( message_string, * ) 'illegal value for data_',&
	292	'output: "', TRIM( do_mask(mid,i) ), '"'
[564]	293	CALL message( 'init_masks', 'PA0330', 1, 2, 0, 6, 0 )
[298]	294	ENDIF
	295	ENDIF
	296
	297	END SELECT
	298	!
	299	!-- Set the internal steering parameters appropriately
	300	domask_no(mid,j) = domask_no(mid,j) + 1
	301	domask(mid,j,domask_no(mid,j)) = do_mask(mid,i)
	302	domask_unit(mid,j,domask_no(mid,j)) = unit
	303
	304	IF ( j == 1 ) THEN
	305	!
	306	!-- Check, if variable is already subject to averaging
	307	found = .FALSE.
	308	DO k = 1, doav_n
	309	IF ( TRIM( doav(k) ) == TRIM( var ) ) found = .TRUE.
	310	ENDDO
	311
	312	IF ( .NOT. found ) THEN
	313	doav_n = doav_n + 1
	314	doav(doav_n) = var
	315	ENDIF
	316	ENDIF
	317
	318	i = i + 1
	319
	320	ENDDO ! do_mask(mid,i)
	321	ENDDO ! mid
	322
	323
	324	!
	325	!-- Determine mask locations for each mask
	326	DO mid = 1, masks
	327	!
	328	!-- Set local masks for each subdomain along all three dimensions
	329	CALL set_mask_locations( 1, dx, 'dx', nx, 'nx', nxl, nxr )
	330	CALL set_mask_locations( 2, dy, 'dy', ny, 'ny', nys, nyn )
	331	CALL set_mask_locations( 3, dz, 'dz', nz, 'nz', nzb, nzt )
	332	!
	333	!-- Set global masks along all three dimensions (required by
	334	!-- define_netcdf_header).
	335	#if defined( __parallel )
	336	!
	337	!-- PE0 receives partial arrays from all processors of the respective mask
	338	!-- and outputs them. Here a barrier has to be set, because otherwise
	339	!-- "-MPI- FATAL: Remote protocol queue full" may occur.
	340	CALL MPI_BARRIER( comm2d, ierr )
	341
	342	IF ( myid == 0 ) THEN
	343	!
	344	!-- Local arrays can be relocated directly.
	345	mask_i_global(mid,mask_start_l(mid,1): &
	346	mask_start_l(mid,1)+mask_size_l(mid,1)-1) = &
	347	mask_i(mid,:mask_size_l(mid,1))
	348	mask_j_global(mid,mask_start_l(mid,2): &
	349	mask_start_l(mid,2)+mask_size_l(mid,2)-1) = &
	350	mask_j(mid,:mask_size_l(mid,2))
	351	mask_k_global(mid,mask_start_l(mid,3): &
	352	mask_start_l(mid,3)+mask_size_l(mid,3)-1) = &
	353	mask_k(mid,:mask_size_l(mid,3))
	354	!
	355	!-- Receive data from all other PEs.
	356	DO n = 1, numprocs-1
	357	!
	358	!-- Receive index limits first, then arrays.
	359	!-- Index limits are received in arbitrary order from the PEs.
	360	CALL MPI_RECV( ind(1), 6, MPI_INTEGER, MPI_ANY_SOURCE, 0, &
	361	comm2d, status, ierr )
	362	!
	363	!-- Not all PEs have data for the mask.
	364	IF ( ind(1) /= -9999 ) THEN
	365	sender = status(MPI_SOURCE)
	366	CALL MPI_RECV( tmp_array(ind(1)), ind(2)-ind(1)+1, &
[363]	367	MPI_INTEGER, sender, 1, comm2d, status, ierr )
[298]	368	mask_i_global(mid,ind(1):ind(2)) = tmp_array(ind(1):ind(2))
	369	CALL MPI_RECV( tmp_array(ind(3)), ind(4)-ind(3)+1, &
[363]	370	MPI_INTEGER, sender, 2, comm2d, status, ierr )
[298]	371	mask_j_global(mid,ind(3):ind(4)) = tmp_array(ind(3):ind(4))
	372	CALL MPI_RECV( tmp_array(ind(5)), ind(6)-ind(5)+1, &
[363]	373	MPI_INTEGER, sender, 3, comm2d, status, ierr )
[298]	374	mask_k_global(mid,ind(5):ind(6)) = tmp_array(ind(5):ind(6))
	375	ENDIF
	376	ENDDO
	377
	378	ELSE
	379	!
	380	!-- If at least part of the mask resides on the PE, send the index limits
	381	!-- for the target array, otherwise send -9999 to PE0.
	382	IF ( mask_size_l(mid,1) > 0 .AND. mask_size_l(mid,2) > 0 .AND. &
	383	mask_size_l(mid,3) > 0 ) &
	384	THEN
	385	ind(1) = mask_start_l(mid,1)
	386	ind(2) = mask_start_l(mid,1) + mask_size_l(mid,1) - 1
	387	ind(3) = mask_start_l(mid,2)
	388	ind(4) = mask_start_l(mid,2) + mask_size_l(mid,2) - 1
	389	ind(5) = mask_start_l(mid,3)
	390	ind(6) = mask_start_l(mid,3) + mask_size_l(mid,3) - 1
	391	ELSE
	392	ind(1) = -9999; ind(2) = -9999
	393	ind(3) = -9999; ind(4) = -9999
	394	ind(5) = -9999; ind(6) = -9999
	395	ENDIF
	396	CALL MPI_SEND( ind(1), 6, MPI_INTEGER, 0, 0, comm2d, ierr )
	397	!
	398	!-- If applicable, send data to PE0.
	399	IF ( ind(1) /= -9999 ) THEN
	400	tmp_array(:mask_size_l(mid,1)) = mask_i(mid,:mask_size_l(mid,1))
	401	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,1), &
[363]	402	MPI_INTEGER, 0, 1, comm2d, ierr )
[298]	403	tmp_array(:mask_size_l(mid,2)) = mask_j(mid,:mask_size_l(mid,2))
	404	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,2), &
[363]	405	MPI_INTEGER, 0, 2, comm2d, ierr )
[298]	406	tmp_array(:mask_size_l(mid,3)) = mask_k(mid,:mask_size_l(mid,3))
	407	CALL MPI_SEND( tmp_array(1), mask_size_l(mid,3), &
[363]	408	MPI_INTEGER, 0, 3, comm2d, ierr )
[298]	409	ENDIF
	410	ENDIF
	411	!
	412	!-- A barrier has to be set, because otherwise some PEs may proceed too fast
	413	!-- so that PE0 may receive wrong data on tag 0.
	414	CALL MPI_BARRIER( comm2d, ierr )
[409]	415
[493]	416	IF ( netcdf_data_format > 2 ) THEN
[409]	417
[493]	418	CALL MPI_BCAST( mask_i_global(mid,:), nx+1, MPI_INTEGER, 0, comm2d, &
	419	ierr )
	420	CALL MPI_BCAST( mask_j_global(mid,:), ny+1, MPI_INTEGER, 0, comm2d, &
	421	ierr )
	422	CALL MPI_BCAST( mask_k_global(mid,:), nz+1, MPI_INTEGER, 0, comm2d, &
	423	ierr )
[409]	424
	425	ENDIF
[298]	426
	427	#else
	428	!
	429	!-- Local arrays can be relocated directly.
	430	mask_i_global(mid,:) = mask_i(mid,:)
	431	mask_j_global(mid,:) = mask_j(mid,:)
	432	mask_k_global(mid,:) = mask_k(mid,:)
	433	#endif
	434	ENDDO ! mid
	435
	436	DEALLOCATE( tmp_array )
	437	!
	438	!-- Internal mask arrays cannot be deallocated on PE 0 because they are
	439	!-- required for header output on PE 0.
	440	IF ( myid /= 0 ) DEALLOCATE( mask, mask_loop )
	441
	442	CONTAINS
[493]	443
[298]	444	SUBROUTINE set_mask_locations( dim, dxyz, dxyz_string, nxyz, nxyz_string, &
	445	lb, ub )
	446	!------------------------------------------------------------------------------!
	447	!
	448	! Description:
	449	! ------------
	450	! Set local mask for each subdomain along 'dim' direction.
	451	!------------------------------------------------------------------------------!
	452
	453	IMPLICIT NONE
	454
	455	CHARACTER (LEN=2) :: dxyz_string, nxyz_string
	456	INTEGER :: count, count_l, dim, m, loop_begin, loop_end, loop_stride, &
	457	lb, nxyz, ub
	458	REAL :: dxyz, ddxyz, tmp1, tmp2
	459
	460	count = 0; count_l = 0; ddxyz = 1.0 / dxyz; tmp1 = 0.0; tmp2 = 0.0
	461
	462	IF ( mask(mid,dim,1) >= 0.0 ) THEN
	463	!
	464	!-- use predefined mask_* array
	465	DO WHILE ( mask(mid,dim,count+1) >= 0.0 )
	466	count = count + 1
	467	IF ( dim == 1 .OR. dim == 2 ) THEN
[303]	468	m = NINT( mask(mid,dim,count) * mask_scale(dim) * ddxyz )
[298]	469	ELSEIF ( dim == 3 ) THEN
	470	ind_array = &
[303]	471	MINLOC( ABS( mask(mid,dim,count) * mask_scale(dim) - zw ) )
[298]	472	m = ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
	473	ENDIF
	474	IF ( m > nxyz ) THEN
[303]	475	WRITE ( message_string, '(I3,A,I3,A,I1,3A,I3)' ) &
	476	m,' in mask ',mid,' along dimension ',dim, &
	477	' exceeds ',nxyz_string,' = ',nxyz
[564]	478	CALL message( 'init_masks', 'PA0331', 1, 2, 0, 6, 0 )
[298]	479	ENDIF
	480	IF ( m >= lb .AND. m <= ub ) THEN
	481	IF ( count_l == 0 ) mask_start_l(mid,dim) = count
	482	count_l = count_l + 1
	483	IF ( dim == 1 ) THEN
	484	mask_i(mid,count_l) = m
	485	ELSEIF ( dim == 2 ) THEN
	486	mask_j(mid,count_l) = m
	487	ELSEIF ( dim == 3 ) THEN
	488	mask_k(mid,count_l) = m
	489	ENDIF
	490	ENDIF
	491	IF ( count == mask_xyz_dimension ) EXIT
	492	ENDDO
	493	mask_size(mid,dim) = count
	494	mask_size_l(mid,dim) = count_l
	495
	496	ELSE
	497	!
	498	!-- use predefined mask_loop_* array, or use the default (all grid points
	499	!-- along this direction)
	500	IF ( mask_loop(mid,dim,1) < 0.0 ) THEN
	501	tmp1 = mask_loop(mid,dim,1)
	502	mask_loop(mid,dim,1) = 0.0 ! (default)
	503	ENDIF
	504	IF ( dim == 1 .OR. dim == 2 ) THEN
	505	IF ( mask_loop(mid,dim,2) < 0.0 ) THEN
	506	tmp2 = mask_loop(mid,dim,2)
[303]	507	mask_loop(mid,dim,2) = nxyz*dxyz / mask_scale(dim) ! (default)
[298]	508	ENDIF
	509	IF ( MAXVAL( mask_loop(mid,dim,1:2) ) &
[303]	510	> nxyz * dxyz / mask_scale(dim) ) THEN
	511	WRITE ( message_string, '(2(A,I3,A,I1,A,F9.3),5A,I1,A,F9.3)' ) &
	512	'mask_loop(',mid,',',dim,',1)=',mask_loop(mid,dim,1), &
	513	' and/or mask_loop(',mid,',',dim,',2)=', &
	514	mask_loop(mid,dim,2),'&exceed ', &
	515	nxyz_string,'*',dxyz_string,'/mask_scale(',dim,')=', &
	516	nxyz*dxyz/mask_scale(dim)
[564]	517	CALL message( 'init_masks', 'PA0332', 1, 2, 0, 6, 0 )
[298]	518	ENDIF
[303]	519	loop_begin = NINT( mask_loop(mid,dim,1) * mask_scale(dim) * ddxyz )
	520	loop_end = NINT( mask_loop(mid,dim,2) * mask_scale(dim) * ddxyz )
	521	loop_stride = NINT( mask_loop(mid,dim,3) * mask_scale(dim) * ddxyz )
[298]	522	ELSEIF ( dim == 3 ) THEN
	523	IF ( mask_loop(mid,dim,2) < 0.0 ) THEN
	524	tmp2 = mask_loop(mid,dim,2)
[303]	525	mask_loop(mid,dim,2) = zw(nz) / mask_scale(dim) ! (default)
[298]	526	ENDIF
	527	IF ( MAXVAL( mask_loop(mid,dim,1:2) ) &
[303]	528	> zw(nz) / mask_scale(dim) ) THEN
	529	WRITE ( message_string, '(2(A,I3,A,I1,A,F9.3),A,I1,A,F9.3)' ) &
	530	'mask_loop(',mid,',',dim,',1)=',mask_loop(mid,dim,1), &
	531	' and/or mask_loop(',mid,',',dim,',2)=', &
	532	mask_loop(mid,dim,2),'&exceed zw(nz)/mask_scale(',dim, &
	533	')=',zw(nz)/mask_scale(dim)
[564]	534	CALL message( 'init_masks', 'PA0333', 1, 2, 0, 6, 0 )
[298]	535	ENDIF
[303]	536	ind_array = &
	537	MINLOC( ABS( mask_loop(mid,dim,1) * mask_scale(dim) - zw ) )
[298]	538	loop_begin = &
[303]	539	ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
	540	ind_array = &
	541	MINLOC( ABS( mask_loop(mid,dim,2) * mask_scale(dim) - zw ) )
[298]	542	loop_end = ind_array(1) - 1 + nzb ! MINLOC uses lower array bound 1
	543	!
[303]	544	!-- The following line assumes a constant vertical grid spacing within
	545	!-- the vertical mask range; it fails for vertical grid stretching.
	546	!-- Maybe revise later. Issue warning but continue execution.
	547	loop_stride = NINT( mask_loop(mid,dim,3) * mask_scale(dim) * ddxyz )
	548
	549	IF ( mask_loop(mid,dim,2) * mask_scale(dim) > dz_stretch_level ) &
	550	THEN
[557]	551	WRITE ( message_string, '(A,I3,A,I1,A,F9.3,A,F8.2,3A)' ) &
	552	'mask_loop(',mid,',',dim,',2)=', mask_loop(mid,dim,2),&
[303]	553	' exceeds dz_stretch_level=',dz_stretch_level, &
	554	'.&Vertical mask locations will not ', &
	555	'match the desired heights&within the stretching ', &
	556	'region. Recommendation: use mask instead of mask_loop.'
[564]	557	CALL message( 'init_masks', 'PA0334', 0, 1, 0, 6, 0 )
[303]	558	ENDIF
	559
[298]	560	ENDIF
	561	!
	562	!-- If necessary, reset mask_loop(mid,dim,1) and mask_loop(mid,dim,2).
	563	IF ( tmp1 < 0.0 ) mask_loop(mid,dim,1) = tmp1
	564	IF ( tmp2 < 0.0 ) mask_loop(mid,dim,2) = tmp2
	565	!
	566	!-- The default stride +/-1 (every grid point) applies if
	567	!-- mask_loop(mid,dim,3) is not specified (its default is zero).
	568	IF ( loop_stride == 0 ) THEN
	569	IF ( loop_end >= loop_begin ) THEN
	570	loop_stride = 1
	571	ELSE
	572	loop_stride = -1
	573	ENDIF
	574	ENDIF
	575	DO m = loop_begin, loop_end, loop_stride
	576	count = count + 1
	577	IF ( m >= lb .AND. m <= ub ) THEN
	578	IF ( count_l == 0 ) mask_start_l(mid,dim) = count
	579	count_l = count_l + 1
	580	IF ( dim == 1 ) THEN
	581	mask_i(mid,count_l) = m
	582	ELSEIF ( dim == 2 ) THEN
	583	mask_j(mid,count_l) = m
	584	ELSEIF ( dim == 3 ) THEN
	585	mask_k(mid,count_l) = m
	586	ENDIF
	587	ENDIF
	588	ENDDO
	589	mask_size(mid,dim) = count
	590	mask_size_l(mid,dim) = count_l
	591	ENDIF
	592
	593	END SUBROUTINE set_mask_locations
	594
	595	END SUBROUTINE init_masks

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