Home

Context Navigation

source: palm/trunk/SOURCE/plant_canopy_model_mod.f90 @ 2008

Last change on this file since 2008 was 2008, checked in by kanani, 8 years ago
last commit documented
Property svn:keywords set to `Id`
File size: 58.6 KB

Rev	Line
[1826]	1	!> @file plant_canopy_model_mod.f90
[2000]	2	!------------------------------------------------------------------------------!
[1036]	3	! This file is part of PALM.
	4	!
[2000]	5	! PALM is free software: you can redistribute it and/or modify it under the
	6	! terms of the GNU General Public License as published by the Free Software
	7	! Foundation, either version 3 of the License, or (at your option) any later
	8	! version.
[1036]	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	!
[1818]	17	! Copyright 1997-2016 Leibniz Universitaet Hannover
[2000]	18	!------------------------------------------------------------------------------!
[1036]	19	!
[257]	20	! Current revisions:
[138]	21	! -----------------
[2008]	22	!
	23	!
	24	! Former revisions:
	25	! -----------------
	26	! $Id: plant_canopy_model_mod.f90 2008 2016-08-24 15:53:00Z kanani $
	27	!
	28	! 2007 2016-08-24 15:47:17Z kanani
[2007]	29	! Added SUBROUTINE pcm_read_plant_canopy_3d for reading 3d plant canopy data
	30	! from file (new case canopy_mode=read_from_file_3d) in the course of
	31	! introduction of urban surface model,
	32	! introduced variable ext_coef,
	33	! resorted SUBROUTINEs to alphabetical order
[1827]	34	!
[2001]	35	! 2000 2016-08-20 18:09:15Z knoop
	36	! Forced header and separation lines into 80 columns
	37	!
[1961]	38	! 1960 2016-07-12 16:34:24Z suehring
	39	! Separate humidity and passive scalar
	40	!
[1954]	41	! 1953 2016-06-21 09:28:42Z suehring
	42	! Bugfix, lad_s and lad must be public
	43	!
[1827]	44	! 1826 2016-04-07 12:01:39Z maronga
	45	! Further modularization
	46	!
[1722]	47	! 1721 2015-11-16 12:56:48Z raasch
	48	! bugfixes: shf is reduced in areas covered with canopy only,
	49	! canopy is set on top of topography
	50	!
[1683]	51	! 1682 2015-10-07 23:56:08Z knoop
	52	! Code annotations made doxygen readable
	53	!
[1485]	54	! 1484 2014-10-21 10:53:05Z kanani
[1484]	55	! Changes due to new module structure of the plant canopy model:
	56	! module plant_canopy_model_mod now contains a subroutine for the
[1826]	57	! initialization of the canopy model (pcm_init),
[1484]	58	! limitation of the canopy drag (previously accounted for by calculation of
	59	! a limiting canopy timestep for the determination of the maximum LES timestep
	60	! in subroutine timestep) is now realized by the calculation of pre-tendencies
[1826]	61	! and preliminary velocities in subroutine pcm_tendency,
	62	! some redundant MPI communication removed in subroutine pcm_init
[1484]	63	! (was previously in init_3d_model),
	64	! unnecessary 3d-arrays lad_u, lad_v, lad_w removed - lad information on the
	65	! respective grid is now provided only by lad_s (e.g. in the calculation of
	66	! the tendency terms or of cum_lai_hf),
	67	! drag_coefficient, lai, leaf_surface_concentration,
	68	! scalar_exchange_coefficient, sec and sls renamed to canopy_drag_coeff,
	69	! cum_lai_hf, leaf_surface_conc, leaf_scalar_exch_coeff, lsec and lsc,
	70	! respectively,
	71	! unnecessary 3d-arrays cdc, lsc and lsec now defined as single-value constants,
	72	! USE-statements and ONLY-lists modified accordingly
[1341]	73	!
	74	! 1340 2014-03-25 19:45:13Z kanani
	75	! REAL constants defined as wp-kind
	76	!
[1321]	77	! 1320 2014-03-20 08:40:49Z raasch
[1320]	78	! ONLY-attribute added to USE-statements,
	79	! kind-parameters added to all INTEGER and REAL declaration statements,
	80	! kinds are defined in new module kinds,
	81	! old module precision_kind is removed,
	82	! revision history before 2012 removed,
	83	! comment fields (!:) to be used for variable explanations added to
	84	! all variable declaration statements
[153]	85	!
[1037]	86	! 1036 2012-10-22 13:43:42Z raasch
	87	! code put under GPL (PALM 3.9)
	88	!
[139]	89	! 138 2007-11-28 10:03:58Z letzel
	90	! Initial revision
	91	!
[138]	92	! Description:
	93	! ------------
[1682]	94	!> 1) Initialization of the canopy model, e.g. construction of leaf area density
[1826]	95	!> profile (subroutine pcm_init).
[1682]	96	!> 2) Calculation of sinks and sources of momentum, heat and scalar concentration
[1826]	97	!> due to canopy elements (subroutine pcm_tendency).
[138]	98	!------------------------------------------------------------------------------!
[1682]	99	MODULE plant_canopy_model_mod
	100
[1484]	101	USE arrays_3d, &
[1960]	102	ONLY: dzu, dzw, e, q, s, shf, tend, u, v, w, zu, zw
[138]	103
[1484]	104	USE indices, &
	105	ONLY: nbgp, nxl, nxlg, nxlu, nxr, nxrg, nyn, nyng, nys, nysg, nysv, &
	106	nz, nzb, nzb_s_inner, nzb_u_inner, nzb_v_inner, nzb_w_inner, nzt
	107
	108	USE kinds
	109
	110
	111	IMPLICIT NONE
	112
	113
[1682]	114	CHARACTER (LEN=20) :: canopy_mode = 'block' !< canopy coverage
[1484]	115
[1682]	116	INTEGER(iwp) :: pch_index = 0 !< plant canopy height/top index
[1484]	117	INTEGER(iwp) :: &
[1682]	118	lad_vertical_gradient_level_ind(10) = -9999 !< lad-profile levels (index)
[1484]	119
[1682]	120	LOGICAL :: calc_beta_lad_profile = .FALSE. !< switch for calc. of lad from beta func.
	121	LOGICAL :: plant_canopy = .FALSE. !< switch for use of canopy model
[1484]	122
[1682]	123	REAL(wp) :: alpha_lad = 9999999.9_wp !< coefficient for lad calculation
	124	REAL(wp) :: beta_lad = 9999999.9_wp !< coefficient for lad calculation
	125	REAL(wp) :: canopy_drag_coeff = 0.0_wp !< canopy drag coefficient (parameter)
	126	REAL(wp) :: cdc = 0.0_wp !< canopy drag coeff. (abbreviation used in equations)
	127	REAL(wp) :: cthf = 0.0_wp !< canopy top heat flux
	128	REAL(wp) :: dt_plant_canopy = 0.0_wp !< timestep account. for canopy drag
[2007]	129	REAL(wp) :: ext_coef = 0.6_wp !< extinction coefficient
[1682]	130	REAL(wp) :: lad_surface = 0.0_wp !< lad surface value
	131	REAL(wp) :: lai_beta = 0.0_wp !< leaf area index (lai) for lad calc.
[1484]	132	REAL(wp) :: &
[1682]	133	leaf_scalar_exch_coeff = 0.0_wp !< canopy scalar exchange coeff.
[1484]	134	REAL(wp) :: &
[1682]	135	leaf_surface_conc = 0.0_wp !< leaf surface concentration
	136	REAL(wp) :: lsec = 0.0_wp !< leaf scalar exchange coeff.
	137	REAL(wp) :: lsc = 0.0_wp !< leaf surface concentration
[1484]	138
	139	REAL(wp) :: &
[1682]	140	lad_vertical_gradient(10) = 0.0_wp !< lad gradient
[1484]	141	REAL(wp) :: &
[1682]	142	lad_vertical_gradient_level(10) = -9999999.9_wp !< lad-prof. levels (in m)
[1484]	143
[1682]	144	REAL(wp), DIMENSION(:), ALLOCATABLE :: lad !< leaf area density
	145	REAL(wp), DIMENSION(:), ALLOCATABLE :: pre_lad !< preliminary lad
[1484]	146
	147	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: &
[1682]	148	canopy_heat_flux !< canopy heat flux
	149	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: cum_lai_hf !< cumulative lai for heatflux calc.
	150	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: lad_s !< lad on scalar-grid
[1484]	151
	152
	153	SAVE
	154
	155
[138]	156	PRIVATE
[1826]	157
	158	!
	159	!-- Public functions
	160	PUBLIC pcm_check_parameters, pcm_header, pcm_init, pcm_parin, pcm_tendency
[138]	161
[1826]	162	!
	163	!-- Public variables and constants
[2007]	164	PUBLIC canopy_heat_flux, canopy_mode, cthf, dt_plant_canopy, lad, lad_s, &
	165	pch_index, plant_canopy
	166
[1484]	167
	168
[1826]	169	INTERFACE pcm_check_parameters
	170	MODULE PROCEDURE pcm_check_parameters
	171	END INTERFACE pcm_check_parameters
	172
	173	INTERFACE pcm_header
	174	MODULE PROCEDURE pcm_header
	175	END INTERFACE pcm_header
	176
	177	INTERFACE pcm_init
	178	MODULE PROCEDURE pcm_init
	179	END INTERFACE pcm_init
[138]	180
[1826]	181	INTERFACE pcm_parin
	182	MODULE PROCEDURE pcm_parin
[2007]	183	END INTERFACE pcm_parin
	184
	185	INTERFACE pcm_read_plant_canopy_3d
	186	MODULE PROCEDURE pcm_read_plant_canopy_3d
	187	END INTERFACE pcm_read_plant_canopy_3d
[1826]	188
	189	INTERFACE pcm_tendency
	190	MODULE PROCEDURE pcm_tendency
	191	MODULE PROCEDURE pcm_tendency_ij
	192	END INTERFACE pcm_tendency
[1484]	193
	194
[138]	195	CONTAINS
	196
[1826]	197
	198	!------------------------------------------------------------------------------!
	199	! Description:
	200	! ------------
	201	!> Check parameters routine for plant canopy model
	202	!------------------------------------------------------------------------------!
	203	SUBROUTINE pcm_check_parameters
[138]	204
[1826]	205	USE control_parameters, &
	206	ONLY: cloud_physics, message_string, microphysics_seifert
	207
	208
	209	IMPLICIT NONE
	210
	211
	212	IF ( canopy_drag_coeff == 0.0_wp ) THEN
	213	message_string = 'plant_canopy = .TRUE. requires a non-zero drag '// &
	214	'coefficient & given value is canopy_drag_coeff = 0.0'
	215	CALL message( 'check_parameters', 'PA0041', 1, 2, 0, 6, 0 )
	216	ENDIF
	217
	218	IF ( ( alpha_lad /= 9999999.9_wp .AND. beta_lad == 9999999.9_wp ) .OR.&
	219	beta_lad /= 9999999.9_wp .AND. alpha_lad == 9999999.9_wp ) THEN
	220	message_string = 'using the beta function for the construction ' // &
	221	'of the leaf area density profile requires ' // &
	222	'both alpha_lad and beta_lad to be /= 9999999.9'
	223	CALL message( 'check_parameters', 'PA0118', 1, 2, 0, 6, 0 )
	224	ENDIF
	225
	226	IF ( calc_beta_lad_profile .AND. lai_beta == 0.0_wp ) THEN
	227	message_string = 'using the beta function for the construction ' // &
	228	'of the leaf area density profile requires ' // &
	229	'a non-zero lai_beta, but given value is ' // &
	230	'lai_beta = 0.0'
	231	CALL message( 'check_parameters', 'PA0119', 1, 2, 0, 6, 0 )
	232	ENDIF
	233
	234	IF ( calc_beta_lad_profile .AND. lad_surface /= 0.0_wp ) THEN
	235	message_string = 'simultaneous setting of alpha_lad /= 9999999.9' // &
	236	'and lad_surface /= 0.0 is not possible, ' // &
	237	'use either vertical gradients or the beta ' // &
	238	'function for the construction of the leaf area '// &
	239	'density profile'
	240	CALL message( 'check_parameters', 'PA0120', 1, 2, 0, 6, 0 )
	241	ENDIF
	242
	243	IF ( cloud_physics .AND. microphysics_seifert ) THEN
	244	message_string = 'plant_canopy = .TRUE. requires cloud_scheme /=' // &
	245	' seifert_beheng'
	246	CALL message( 'check_parameters', 'PA0360', 1, 2, 0, 6, 0 )
	247	ENDIF
	248
	249
	250	END SUBROUTINE pcm_check_parameters
	251
	252
[138]	253	!------------------------------------------------------------------------------!
[1484]	254	! Description:
	255	! ------------
[1826]	256	!> Header output for plant canopy model
	257	!------------------------------------------------------------------------------!
	258	SUBROUTINE pcm_header ( io )
	259
	260	USE control_parameters, &
	261	ONLY: dz, passive_scalar
	262
	263
	264	IMPLICIT NONE
	265
	266	CHARACTER (LEN=10) :: coor_chr !<
	267
	268	CHARACTER (LEN=86) :: coordinates !<
	269	CHARACTER (LEN=86) :: gradients !<
	270	CHARACTER (LEN=86) :: leaf_area_density !<
	271	CHARACTER (LEN=86) :: slices !<
	272
	273	INTEGER(iwp) :: i !<
	274	INTEGER(iwp), INTENT(IN) :: io !< Unit of the output file
	275	INTEGER(iwp) :: k !<
	276
	277	REAL(wp) :: canopy_height !< canopy height (in m)
	278
	279	canopy_height = pch_index * dz
	280
	281	WRITE ( io, 1 ) canopy_mode, canopy_height, pch_index, &
	282	canopy_drag_coeff
	283	IF ( passive_scalar ) THEN
	284	WRITE ( io, 2 ) leaf_scalar_exch_coeff, &
	285	leaf_surface_conc
	286	ENDIF
	287
	288	!
	289	!-- Heat flux at the top of vegetation
	290	WRITE ( io, 3 ) cthf
	291
	292	!
	293	!-- Leaf area density profile, calculated either from given vertical
	294	!-- gradients or from beta probability density function.
	295	IF ( .NOT. calc_beta_lad_profile ) THEN
	296
	297	!-- Building output strings, starting with surface value
	298	WRITE ( leaf_area_density, '(F7.4)' ) lad_surface
	299	gradients = '------'
	300	slices = ' 0'
	301	coordinates = ' 0.0'
	302	i = 1
	303	DO WHILE ( i < 11 .AND. lad_vertical_gradient_level_ind(i) &
	304	/= -9999 )
	305
	306	WRITE (coor_chr,'(F7.2)') lad(lad_vertical_gradient_level_ind(i))
	307	leaf_area_density = TRIM( leaf_area_density ) // ' ' // &
	308	TRIM( coor_chr )
	309
	310	WRITE (coor_chr,'(F7.2)') lad_vertical_gradient(i)
	311	gradients = TRIM( gradients ) // ' ' // TRIM( coor_chr )
	312
	313	WRITE (coor_chr,'(I7)') lad_vertical_gradient_level_ind(i)
	314	slices = TRIM( slices ) // ' ' // TRIM( coor_chr )
	315
	316	WRITE (coor_chr,'(F7.1)') lad_vertical_gradient_level(i)
	317	coordinates = TRIM( coordinates ) // ' ' // TRIM( coor_chr )
	318
	319	i = i + 1
	320	ENDDO
	321
	322	WRITE ( io, 4 ) TRIM( coordinates ), TRIM( leaf_area_density ), &
	323	TRIM( gradients ), TRIM( slices )
	324
	325	ELSE
	326
	327	WRITE ( leaf_area_density, '(F7.4)' ) lad_surface
	328	coordinates = ' 0.0'
	329
	330	DO k = 1, pch_index
	331
	332	WRITE (coor_chr,'(F7.2)') lad(k)
	333	leaf_area_density = TRIM( leaf_area_density ) // ' ' // &
	334	TRIM( coor_chr )
	335
	336	WRITE (coor_chr,'(F7.1)') zu(k)
	337	coordinates = TRIM( coordinates ) // ' ' // TRIM( coor_chr )
	338
	339	ENDDO
	340
	341	WRITE ( io, 5 ) TRIM( coordinates ), TRIM( leaf_area_density ), &
	342	alpha_lad, beta_lad, lai_beta
	343
	344	ENDIF
	345
	346	1 FORMAT (//' Vegetation canopy (drag) model:'/ &
	347	' ------------------------------'// &
	348	' Canopy mode: ', A / &
	349	' Canopy height: ',F6.2,'m (',I4,' grid points)' / &
	350	' Leaf drag coefficient: ',F6.2 /)
	351	2 FORMAT (/ ' Scalar exchange coefficient: ',F6.2 / &
	352	' Scalar concentration at leaf surfaces in kg/m**3: ',F6.2 /)
	353	3 FORMAT (' Predefined constant heatflux at the top of the vegetation: ',F6.2, &
	354	' K m/s')
	355	4 FORMAT (/ ' Characteristic levels of the leaf area density:'// &
	356	' Height: ',A,' m'/ &
	357	' Leaf area density: ',A,' m2/m3'/ &
	358	' Gradient: ',A,' m2/m4'/ &
	359	' Gridpoint: ',A)
	360	5 FORMAT (//' Characteristic levels of the leaf area density and coefficients:'&
	361	// ' Height: ',A,' m'/ &
	362	' Leaf area density: ',A,' m2/m3'/ &
	363	' Coefficient alpha: ',F6.2 / &
	364	' Coefficient beta: ',F6.2 / &
	365	' Leaf area index: ',F6.2,' m2/m2' /)
	366
	367	END SUBROUTINE pcm_header
	368
	369
	370	!------------------------------------------------------------------------------!
	371	! Description:
	372	! ------------
[1682]	373	!> Initialization of the plant canopy model
[138]	374	!------------------------------------------------------------------------------!
[1826]	375	SUBROUTINE pcm_init
[1484]	376
	377
	378	USE control_parameters, &
[2007]	379	ONLY: coupling_char, dz, humidity, io_blocks, io_group, &
	380	message_string, ocean, passive_scalar
[1484]	381
	382
	383	IMPLICIT NONE
	384
[2007]	385	CHARACTER(10) :: pct
	386
	387	INTEGER(iwp) :: i !< running index
	388	INTEGER(iwp) :: ii !< index
	389	INTEGER(iwp) :: j !< running index
	390	INTEGER(iwp) :: k !< running index
[1484]	391
[2007]	392	REAL(wp) :: int_bpdf !< vertical integral for lad-profile construction
	393	REAL(wp) :: dzh !< vertical grid spacing in units of canopy height
	394	REAL(wp) :: gradient !< gradient for lad-profile construction
	395	REAL(wp) :: canopy_height !< canopy height for lad-profile construction
	396	REAL(wp) :: pcv(nzb:nzt+1) !<
	397
[1484]	398	!
	399	!-- Allocate one-dimensional arrays for the computation of the
	400	!-- leaf area density (lad) profile
	401	ALLOCATE( lad(0:nz+1), pre_lad(0:nz+1) )
	402	lad = 0.0_wp
	403	pre_lad = 0.0_wp
	404
	405	!
[1826]	406	!-- Set flag that indicates that the lad-profile shall be calculated by using
	407	!-- a beta probability density function
	408	IF ( alpha_lad /= 9999999.9_wp .AND. beta_lad /= 9999999.9_wp ) THEN
	409	calc_beta_lad_profile = .TRUE.
	410	ENDIF
	411
	412
	413	!
[1484]	414	!-- Compute the profile of leaf area density used in the plant
	415	!-- canopy model. The profile can either be constructed from
	416	!-- prescribed vertical gradients of the leaf area density or by
	417	!-- using a beta probability density function (see e.g. Markkanen et al.,
	418	!-- 2003: Boundary-Layer Meteorology, 106, 437-459)
	419	IF ( .NOT. calc_beta_lad_profile ) THEN
	420
	421	!
	422	!-- Use vertical gradients for lad-profile construction
	423	i = 1
	424	gradient = 0.0_wp
	425
	426	IF ( .NOT. ocean ) THEN
	427
	428	lad(0) = lad_surface
	429	lad_vertical_gradient_level_ind(1) = 0
	430
	431	DO k = 1, pch_index
	432	IF ( i < 11 ) THEN
	433	IF ( lad_vertical_gradient_level(i) < zu(k) .AND. &
	434	lad_vertical_gradient_level(i) >= 0.0_wp ) THEN
	435	gradient = lad_vertical_gradient(i)
	436	lad_vertical_gradient_level_ind(i) = k - 1
	437	i = i + 1
	438	ENDIF
	439	ENDIF
	440	IF ( gradient /= 0.0_wp ) THEN
	441	IF ( k /= 1 ) THEN
	442	lad(k) = lad(k-1) + dzu(k) * gradient
	443	ELSE
	444	lad(k) = lad_surface + dzu(k) * gradient
	445	ENDIF
	446	ELSE
	447	lad(k) = lad(k-1)
	448	ENDIF
	449	ENDDO
	450
	451	ENDIF
	452
	453	!
	454	!-- In case of no given leaf area density gradients, choose a vanishing
	455	!-- gradient. This information is used for the HEADER and the RUN_CONTROL
	456	!-- file.
	457	IF ( lad_vertical_gradient_level(1) == -9999999.9_wp ) THEN
	458	lad_vertical_gradient_level(1) = 0.0_wp
	459	ENDIF
	460
	461	ELSE
	462
	463	!
	464	!-- Use beta function for lad-profile construction
	465	int_bpdf = 0.0_wp
	466	canopy_height = pch_index * dz
	467
	468	DO k = nzb, pch_index
	469	int_bpdf = int_bpdf + &
[1826]	470	( ( ( zw(k) / canopy_height )*( alpha_lad-1.0_wp ) ) &
	471	( ( 1.0_wp - ( zw(k) / canopy_height ) )**( &
	472	beta_lad-1.0_wp ) ) &
	473	* ( ( zw(k+1)-zw(k) ) / canopy_height ) )
[1484]	474	ENDDO
	475
	476	!
	477	!-- Preliminary lad profile (defined on w-grid)
	478	DO k = nzb, pch_index
[1826]	479	pre_lad(k) = lai_beta * &
	480	( ( ( zw(k) / canopy_height )**( alpha_lad-1.0_wp ) ) &
	481	* ( ( 1.0_wp - ( zw(k) / canopy_height ) )**( &
	482	beta_lad-1.0_wp ) ) / int_bpdf &
	483	) / canopy_height
[1484]	484	ENDDO
	485
	486	!
	487	!-- Final lad profile (defined on scalar-grid level, since most prognostic
	488	!-- quantities are defined there, hence, less interpolation is required
	489	!-- when calculating the canopy tendencies)
	490	lad(0) = pre_lad(0)
	491	DO k = nzb+1, pch_index
	492	lad(k) = 0.5 * ( pre_lad(k-1) + pre_lad(k) )
	493	ENDDO
	494
	495	ENDIF
	496
	497	!
	498	!-- Allocate 3D-array for the leaf area density (lad_s). In case of a
	499	!-- prescribed canopy-top heat flux (cthf), allocate 3D-arrays for
	500	!-- the cumulative leaf area index (cum_lai_hf) and the canopy heat flux.
	501	ALLOCATE( lad_s(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	502
	503	IF ( cthf /= 0.0_wp ) THEN
	504	ALLOCATE( cum_lai_hf(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
	505	canopy_heat_flux(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	506	ENDIF
	507
	508	!
	509	!-- Initialize canopy parameters cdc (canopy drag coefficient),
	510	!-- lsec (leaf scalar exchange coefficient), lsc (leaf surface concentration)
	511	!-- with the prescribed values
	512	cdc = canopy_drag_coeff
	513	lsec = leaf_scalar_exch_coeff
	514	lsc = leaf_surface_conc
	515
	516	!
	517	!-- Initialization of the canopy coverage in the model domain:
	518	!-- Setting the parameter canopy_mode = 'block' initializes a canopy, which
	519	!-- fully covers the domain surface
	520	SELECT CASE ( TRIM( canopy_mode ) )
	521
	522	CASE( 'block' )
	523
	524	DO i = nxlg, nxrg
	525	DO j = nysg, nyng
	526	lad_s(:,j,i) = lad(:)
	527	ENDDO
	528	ENDDO
	529
[2007]	530	CASE ( 'read_from_file_3d' )
	531	!
	532	!-- Initialize canopy parameters cdc (canopy drag coefficient),
	533	!-- lsec (leaf scalar exchange coefficient), lsc (leaf surface concentration)
	534	!-- from file which contains complete 3D data (separate vertical profiles for
	535	!-- each location).
	536	CALL pcm_read_plant_canopy_3d
	537
[1484]	538	CASE DEFAULT
	539	!
[2007]	540	!-- The DEFAULT case is reached either if the parameter
	541	!-- canopy mode contains a wrong character string or if the
	542	!-- user has coded a special case in the user interface.
	543	!-- There, the subroutine user_init_plant_canopy checks
	544	!-- which of these two conditions applies.
	545	CALL user_init_plant_canopy
[1484]	546
	547	END SELECT
	548
	549	!
	550	!-- Initialization of the canopy heat source distribution
	551	IF ( cthf /= 0.0_wp ) THEN
	552	!
	553	!-- Piecewise calculation of the leaf area index by vertical
	554	!-- integration of the leaf area density
	555	cum_lai_hf(:,:,:) = 0.0_wp
	556	DO i = nxlg, nxrg
	557	DO j = nysg, nyng
	558	DO k = pch_index-1, 0, -1
	559	IF ( k == pch_index-1 ) THEN
	560	cum_lai_hf(k,j,i) = cum_lai_hf(k+1,j,i) + &
	561	( 0.5_wp * lad_s(k+1,j,i) * &
	562	( zw(k+1) - zu(k+1) ) ) + &
	563	( 0.5_wp * ( 0.5_wp * ( lad_s(k+1,j,i) + &
	564	lad_s(k,j,i) ) + &
	565	lad_s(k+1,j,i) ) * &
	566	( zu(k+1) - zw(k) ) )
	567	ELSE
	568	cum_lai_hf(k,j,i) = cum_lai_hf(k+1,j,i) + &
	569	( 0.5_wp * ( 0.5_wp * ( lad_s(k+2,j,i) + &
	570	lad_s(k+1,j,i) ) + &
	571	lad_s(k+1,j,i) ) * &
	572	( zw(k+1) - zu(k+1) ) ) + &
	573	( 0.5_wp * ( 0.5_wp * ( lad_s(k+1,j,i) + &
	574	lad_s(k,j,i) ) + &
	575	lad_s(k+1,j,i) ) * &
	576	( zu(k+1) - zw(k) ) )
	577	ENDIF
	578	ENDDO
	579	ENDDO
	580	ENDDO
	581
	582	!
	583	!-- Calculation of the upward kinematic vertical heat flux within the
	584	!-- canopy
	585	DO i = nxlg, nxrg
	586	DO j = nysg, nyng
	587	DO k = 0, pch_index
	588	canopy_heat_flux(k,j,i) = cthf * &
[2007]	589	exp( -ext_coef * cum_lai_hf(k,j,i) )
[1484]	590	ENDDO
	591	ENDDO
	592	ENDDO
	593
	594	!
[1721]	595	!-- In areas covered with canopy, the surface heat flux is set to
	596	!-- the surface value of the above calculated in-canopy heat flux
	597	!-- distribution
	598	DO i = nxlg,nxrg
	599	DO j = nysg, nyng
	600	IF ( canopy_heat_flux(0,j,i) /= cthf ) THEN
	601	shf(j,i) = canopy_heat_flux(0,j,i)
	602	ENDIF
	603	ENDDO
	604	ENDDO
[1484]	605
	606	ENDIF
	607
	608
	609
[1826]	610	END SUBROUTINE pcm_init
[1484]	611
	612
[2007]	613	!------------------------------------------------------------------------------!
	614	! Description:
	615	! ------------
	616	!> Parin for &canopy_par for plant canopy model
	617	!------------------------------------------------------------------------------!
	618	SUBROUTINE pcm_parin
[1484]	619
[2007]	620
	621	IMPLICIT NONE
	622
	623	CHARACTER (LEN=80) :: line !< dummy string that contains the current line of the parameter file
	624
	625	NAMELIST /canopy_par/ alpha_lad, beta_lad, canopy_drag_coeff, &
	626	canopy_mode, cthf, &
	627	lad_surface, &
	628	lad_vertical_gradient, &
	629	lad_vertical_gradient_level, &
	630	lai_beta, &
	631	leaf_scalar_exch_coeff, &
	632	leaf_surface_conc, pch_index
	633
	634	line = ' '
	635
	636	!
	637	!-- Try to find radiation model package
	638	REWIND ( 11 )
	639	line = ' '
	640	DO WHILE ( INDEX( line, '&canopy_par' ) == 0 )
	641	READ ( 11, '(A)', END=10 ) line
	642	ENDDO
	643	BACKSPACE ( 11 )
	644
	645	!
	646	!-- Read user-defined namelist
	647	READ ( 11, canopy_par )
	648
	649	!
	650	!-- Set flag that indicates that the radiation model is switched on
	651	plant_canopy = .TRUE.
	652
	653	10 CONTINUE
	654
	655
	656	END SUBROUTINE pcm_parin
	657
	658
	659
[1484]	660	!------------------------------------------------------------------------------!
	661	! Description:
	662	! ------------
[2007]	663	!
	664	!> Loads 3D plant canopy data from file. File format is as follows:
	665	!>
	666	!> num_levels
	667	!> dtype,x,y,value(nzb),value(nzb+1), ... ,value(nzb+num_levels-1)
	668	!> dtype,x,y,value(nzb),value(nzb+1), ... ,value(nzb+num_levels-1)
	669	!> dtype,x,y,value(nzb),value(nzb+1), ... ,value(nzb+num_levels-1)
	670	!> ...
	671	!>
	672	!> i.e. first line determines number of levels and further lines represent plant
	673	!> canopy data, one line per column and variable. In each data line,
	674	!> dtype represents variable to be set:
	675	!>
	676	!> dtype=1: leaf area density (lad_s)
	677	!> dtype=2: canopy drag coefficient (cdc)
	678	!> dtype=3: leaf scalar exchange coefficient (lsec)
	679	!> dtype=4: leaf surface concentration (lsc)
	680	!>
	681	!> Zeros are added automatically above num_levels until top of domain. Any
	682	!> non-specified (x,y) columns have zero values as default.
	683	!------------------------------------------------------------------------------!
	684	SUBROUTINE pcm_read_plant_canopy_3d
	685	USE control_parameters, &
	686	ONLY: passive_scalar, message_string
	687	IMPLICIT NONE
	688
	689	INTEGER(iwp) :: i, j, dtype, nzp, nzpltop, nzpl, kk
	690	REAL(wp), DIMENSION(:), ALLOCATABLE :: col
	691
	692	lad_s = 0.0_wp
	693	! cdc = 0.0_wp
	694	! if ( passive_scalar ) then
	695	! lsc = 0.0_wp
	696	! lsec = 0.0_wp
	697	! endif
	698
	699	WRITE(9,*) 'Reading PLANT_CANOPY_DATA_3D', nzt
	700	FLUSH(9)
	701	OPEN(152, file='PLANT_CANOPY_DATA_3D', access='SEQUENTIAL', &
	702	action='READ', status='OLD', form='FORMATTED', err=515)
	703	READ(152, *, err=516, end=517) nzp !< read first line = number of vertical layers
	704	ALLOCATE(col(1:nzp))
	705	nzpltop = MIN(nzt+1, nzb+nzp-1)
	706	nzpl = nzpltop - nzb + 1 !< no. of layers to assign
	707
	708	DO
	709	READ(152, *, err=516, end=517) dtype, i, j, col(:)
	710	IF ( i < nxlg .or. i > nxrg .or. j < nysg .or. j > nyng ) CYCLE
	711	WRITE(9,*) 'Read ', i,j,nzb_s_inner(j,i),col(:)
	712	FLUSH(9)
	713
	714	SELECT CASE (dtype)
	715	CASE( 1 ) !< leaf area density
	716	!-- only lad_s has flat z-coordinate, others have regular
	717	kk = nzb_s_inner(j, i)
	718	lad_s(nzb:nzpltop-kk, j, i) = col(1+kk:nzpl)
	719	! CASE( 2 ) !< canopy drag coefficient
	720	! cdc(nzb:nzpltop, j, i) = col(1:nzpl)
	721	! CASE( 3 ) !< leaf scalar exchange coefficient
	722	! lsec(nzb:nzpltop, j, i) = col(1:nzpl)
	723	! CASE( 4 ) !< leaf surface concentration
	724	! lsc(nzb:nzpltop, j, i) = col(1:nzpl)
	725	CASE DEFAULT
	726	write(message_string, '(a,i2,a)') &
	727	'Unknown record type in file PLANT_CANOPY_DATA_3D: "', dtype, '"'
	728	CALL message( 'pcm_read_plant_canopy_3d', 'PA0530', 1, 2, 0, 6, 0 )
	729	END SELECT
	730	ENDDO
	731
	732	515 message_string = 'error opening file PLANT_CANOPY_DATA_3D'
	733	CALL message( 'pcm_read_plant_canopy_3d', 'PA0531', 1, 2, 0, 6, 0 )
	734
	735	516 message_string = 'error reading file PLANT_CANOPY_DATA_3D'
	736	CALL message( 'pcm_read_plant_canopy_3d', 'PA0532', 1, 2, 0, 6, 0 )
	737
	738	517 CLOSE(152)
	739	DEALLOCATE(col)
	740
	741	END SUBROUTINE pcm_read_plant_canopy_3d
	742
	743
	744
	745	!------------------------------------------------------------------------------!
	746	! Description:
	747	! ------------
[1682]	748	!> Calculation of the tendency terms, accounting for the effect of the plant
	749	!> canopy on momentum and scalar quantities.
	750	!>
	751	!> The canopy is located where the leaf area density lad_s(k,j,i) > 0.0
[1826]	752	!> (defined on scalar grid), as initialized in subroutine pcm_init.
[1682]	753	!> The lad on the w-grid is vertically interpolated from the surrounding
	754	!> lad_s. The upper boundary of the canopy is defined on the w-grid at
	755	!> k = pch_index. Here, the lad is zero.
	756	!>
	757	!> The canopy drag must be limited (previously accounted for by calculation of
	758	!> a limiting canopy timestep for the determination of the maximum LES timestep
	759	!> in subroutine timestep), since it is physically impossible that the canopy
	760	!> drag alone can locally change the sign of a velocity component. This
	761	!> limitation is realized by calculating preliminary tendencies and velocities.
	762	!> It is subsequently checked if the preliminary new velocity has a different
	763	!> sign than the current velocity. If so, the tendency is limited in a way that
	764	!> the velocity can at maximum be reduced to zero by the canopy drag.
	765	!>
	766	!>
	767	!> Call for all grid points
[1484]	768	!------------------------------------------------------------------------------!
[1826]	769	SUBROUTINE pcm_tendency( component )
[138]	770
	771
[1320]	772	USE control_parameters, &
[1484]	773	ONLY: dt_3d, message_string
[1320]	774
	775	USE kinds
	776
[138]	777	IMPLICIT NONE
	778
[1682]	779	INTEGER(iwp) :: component !< prognostic variable (u,v,w,pt,q,e)
	780	INTEGER(iwp) :: i !< running index
	781	INTEGER(iwp) :: j !< running index
	782	INTEGER(iwp) :: k !< running index
[1721]	783	INTEGER(iwp) :: kk !< running index for flat lad arrays
[1484]	784
[1682]	785	REAL(wp) :: ddt_3d !< inverse of the LES timestep (dt_3d)
	786	REAL(wp) :: lad_local !< local lad value
	787	REAL(wp) :: pre_tend !< preliminary tendency
	788	REAL(wp) :: pre_u !< preliminary u-value
	789	REAL(wp) :: pre_v !< preliminary v-value
	790	REAL(wp) :: pre_w !< preliminary w-value
[1484]	791
	792
	793	ddt_3d = 1.0_wp / dt_3d
[138]	794
	795	!
[1484]	796	!-- Compute drag for the three velocity components and the SGS-TKE:
[138]	797	SELECT CASE ( component )
	798
	799	!
	800	!-- u-component
	801	CASE ( 1 )
	802	DO i = nxlu, nxr
	803	DO j = nys, nyn
[1721]	804	DO k = nzb_u_inner(j,i)+1, nzb_u_inner(j,i)+pch_index
[1484]	805
[1721]	806	kk = k - nzb_u_inner(j,i) !- lad arrays are defined flat
[1484]	807	!
	808	!-- In order to create sharp boundaries of the plant canopy,
	809	!-- the lad on the u-grid at index (k,j,i) is equal to
	810	!-- lad_s(k,j,i), rather than being interpolated from the
	811	!-- surrounding lad_s, because this would yield smaller lad
	812	!-- at the canopy boundaries than inside of the canopy.
	813	!-- For the same reason, the lad at the rightmost(i+1)canopy
	814	!-- boundary on the u-grid equals lad_s(k,j,i).
[1721]	815	lad_local = lad_s(kk,j,i)
	816	IF ( lad_local == 0.0_wp .AND. lad_s(kk,j,i-1) > 0.0_wp )&
	817	THEN
	818	lad_local = lad_s(kk,j,i-1)
[1484]	819	ENDIF
	820
	821	pre_tend = 0.0_wp
	822	pre_u = 0.0_wp
	823	!
	824	!-- Calculate preliminary value (pre_tend) of the tendency
	825	pre_tend = - cdc * &
	826	lad_local * &
	827	SQRT( u(k,j,i)**2 + &
	828	( 0.25_wp * ( v(k,j,i-1) + &
	829	v(k,j,i) + &
	830	v(k,j+1,i) + &
	831	v(k,j+1,i-1) ) &
	832	)**2 + &
	833	( 0.25_wp * ( w(k-1,j,i-1) + &
	834	w(k-1,j,i) + &
	835	w(k,j,i-1) + &
	836	w(k,j,i) ) &
	837	)**2 &
	838	) * &
	839	u(k,j,i)
	840
	841	!
	842	!-- Calculate preliminary new velocity, based on pre_tend
	843	pre_u = u(k,j,i) + dt_3d * pre_tend
	844	!
	845	!-- Compare sign of old velocity and new preliminary velocity,
	846	!-- and in case the signs are different, limit the tendency
	847	IF ( SIGN(pre_u,u(k,j,i)) /= pre_u ) THEN
	848	pre_tend = - u(k,j,i) * ddt_3d
	849	ELSE
	850	pre_tend = pre_tend
	851	ENDIF
	852	!
	853	!-- Calculate final tendency
	854	tend(k,j,i) = tend(k,j,i) + pre_tend
	855
[138]	856	ENDDO
	857	ENDDO
	858	ENDDO
	859
	860	!
	861	!-- v-component
	862	CASE ( 2 )
	863	DO i = nxl, nxr
	864	DO j = nysv, nyn
[1721]	865	DO k = nzb_v_inner(j,i)+1, nzb_v_inner(j,i)+pch_index
[1484]	866
[1721]	867	kk = k - nzb_v_inner(j,i) !- lad arrays are defined flat
[1484]	868	!
	869	!-- In order to create sharp boundaries of the plant canopy,
	870	!-- the lad on the v-grid at index (k,j,i) is equal to
	871	!-- lad_s(k,j,i), rather than being interpolated from the
	872	!-- surrounding lad_s, because this would yield smaller lad
	873	!-- at the canopy boundaries than inside of the canopy.
	874	!-- For the same reason, the lad at the northmost(j+1) canopy
	875	!-- boundary on the v-grid equals lad_s(k,j,i).
[1721]	876	lad_local = lad_s(kk,j,i)
	877	IF ( lad_local == 0.0_wp .AND. lad_s(kk,j-1,i) > 0.0_wp )&
	878	THEN
	879	lad_local = lad_s(kk,j-1,i)
[1484]	880	ENDIF
	881
	882	pre_tend = 0.0_wp
	883	pre_v = 0.0_wp
	884	!
	885	!-- Calculate preliminary value (pre_tend) of the tendency
	886	pre_tend = - cdc * &
	887	lad_local * &
	888	SQRT( ( 0.25_wp * ( u(k,j-1,i) + &
	889	u(k,j-1,i+1) + &
	890	u(k,j,i) + &
	891	u(k,j,i+1) ) &
	892	)**2 + &
	893	v(k,j,i)**2 + &
	894	( 0.25_wp * ( w(k-1,j-1,i) + &
	895	w(k-1,j,i) + &
	896	w(k,j-1,i) + &
	897	w(k,j,i) ) &
	898	)**2 &
	899	) * &
	900	v(k,j,i)
	901
	902	!
	903	!-- Calculate preliminary new velocity, based on pre_tend
	904	pre_v = v(k,j,i) + dt_3d * pre_tend
	905	!
	906	!-- Compare sign of old velocity and new preliminary velocity,
	907	!-- and in case the signs are different, limit the tendency
	908	IF ( SIGN(pre_v,v(k,j,i)) /= pre_v ) THEN
	909	pre_tend = - v(k,j,i) * ddt_3d
	910	ELSE
	911	pre_tend = pre_tend
	912	ENDIF
	913	!
	914	!-- Calculate final tendency
	915	tend(k,j,i) = tend(k,j,i) + pre_tend
	916
[138]	917	ENDDO
	918	ENDDO
	919	ENDDO
	920
	921	!
	922	!-- w-component
	923	CASE ( 3 )
	924	DO i = nxl, nxr
	925	DO j = nys, nyn
[1721]	926	DO k = nzb_w_inner(j,i)+1, nzb_w_inner(j,i)+pch_index-1
[1484]	927
[1721]	928	kk = k - nzb_w_inner(j,i) !- lad arrays are defined flat
	929
[1484]	930	pre_tend = 0.0_wp
	931	pre_w = 0.0_wp
	932	!
	933	!-- Calculate preliminary value (pre_tend) of the tendency
	934	pre_tend = - cdc * &
	935	(0.5_wp * &
[1721]	936	( lad_s(kk+1,j,i) + lad_s(kk,j,i) )) * &
[1484]	937	SQRT( ( 0.25_wp * ( u(k,j,i) + &
	938	u(k,j,i+1) + &
	939	u(k+1,j,i) + &
	940	u(k+1,j,i+1) ) &
	941	)**2 + &
	942	( 0.25_wp * ( v(k,j,i) + &
	943	v(k,j+1,i) + &
	944	v(k+1,j,i) + &
	945	v(k+1,j+1,i) ) &
	946	)**2 + &
	947	w(k,j,i)**2 &
	948	) * &
	949	w(k,j,i)
	950	!
	951	!-- Calculate preliminary new velocity, based on pre_tend
	952	pre_w = w(k,j,i) + dt_3d * pre_tend
	953	!
	954	!-- Compare sign of old velocity and new preliminary velocity,
	955	!-- and in case the signs are different, limit the tendency
	956	IF ( SIGN(pre_w,w(k,j,i)) /= pre_w ) THEN
	957	pre_tend = - w(k,j,i) * ddt_3d
	958	ELSE
	959	pre_tend = pre_tend
	960	ENDIF
	961	!
	962	!-- Calculate final tendency
	963	tend(k,j,i) = tend(k,j,i) + pre_tend
	964
[138]	965	ENDDO
	966	ENDDO
	967	ENDDO
	968
	969	!
[153]	970	!-- potential temperature
[138]	971	CASE ( 4 )
	972	DO i = nxl, nxr
	973	DO j = nys, nyn
[1721]	974	DO k = nzb_s_inner(j,i)+1, nzb_s_inner(j,i)+pch_index
	975	kk = k - nzb_s_inner(j,i) !- lad arrays are defined flat
[1484]	976	tend(k,j,i) = tend(k,j,i) + &
[1721]	977	( canopy_heat_flux(kk,j,i) - &
	978	canopy_heat_flux(kk-1,j,i) ) / dzw(k)
[153]	979	ENDDO
	980	ENDDO
	981	ENDDO
	982
	983	!
[1960]	984	!-- humidity
[153]	985	CASE ( 5 )
	986	DO i = nxl, nxr
	987	DO j = nys, nyn
[1721]	988	DO k = nzb_s_inner(j,i)+1, nzb_s_inner(j,i)+pch_index
	989	kk = k - nzb_s_inner(j,i) !- lad arrays are defined flat
[1484]	990	tend(k,j,i) = tend(k,j,i) - &
	991	lsec * &
[1721]	992	lad_s(kk,j,i) * &
[1484]	993	SQRT( ( 0.5_wp * ( u(k,j,i) + &
	994	u(k,j,i+1) ) &
	995	)**2 + &
	996	( 0.5_wp * ( v(k,j,i) + &
	997	v(k,j+1,i) ) &
	998	)**2 + &
	999	( 0.5_wp * ( w(k-1,j,i) + &
	1000	w(k,j,i) ) &
	1001	)**2 &
	1002	) * &
	1003	( q(k,j,i) - lsc )
[153]	1004	ENDDO
	1005	ENDDO
	1006	ENDDO
	1007
	1008	!
	1009	!-- sgs-tke
	1010	CASE ( 6 )
	1011	DO i = nxl, nxr
	1012	DO j = nys, nyn
[1721]	1013	DO k = nzb_s_inner(j,i)+1, nzb_s_inner(j,i)+pch_index
	1014	kk = k - nzb_s_inner(j,i) !- lad arrays are defined flat
[1484]	1015	tend(k,j,i) = tend(k,j,i) - &
	1016	2.0_wp * cdc * &
[1721]	1017	lad_s(kk,j,i) * &
[1484]	1018	SQRT( ( 0.5_wp * ( u(k,j,i) + &
	1019	u(k,j,i+1) ) &
	1020	)**2 + &
	1021	( 0.5_wp * ( v(k,j,i) + &
	1022	v(k,j+1,i) ) &
	1023	)**2 + &
	1024	( 0.5_wp * ( w(k,j,i) + &
	1025	w(k+1,j,i) ) &
	1026	)**2 &
	1027	) * &
	1028	e(k,j,i)
[138]	1029	ENDDO
	1030	ENDDO
	1031	ENDDO
[1960]	1032	!
	1033	!-- scalar concentration
	1034	CASE ( 7 )
	1035	DO i = nxl, nxr
	1036	DO j = nys, nyn
	1037	DO k = nzb_s_inner(j,i)+1, nzb_s_inner(j,i)+pch_index
	1038	kk = k - nzb_s_inner(j,i) !- lad arrays are defined flat
	1039	tend(k,j,i) = tend(k,j,i) - &
	1040	lsec * &
	1041	lad_s(kk,j,i) * &
	1042	SQRT( ( 0.5_wp * ( u(k,j,i) + &
	1043	u(k,j,i+1) ) &
	1044	)**2 + &
	1045	( 0.5_wp * ( v(k,j,i) + &
	1046	v(k,j+1,i) ) &
	1047	)**2 + &
	1048	( 0.5_wp * ( w(k-1,j,i) + &
	1049	w(k,j,i) ) &
	1050	)**2 &
	1051	) * &
	1052	( s(k,j,i) - lsc )
	1053	ENDDO
	1054	ENDDO
	1055	ENDDO
[1484]	1056
	1057
[1960]	1058
[138]	1059	CASE DEFAULT
	1060
[257]	1061	WRITE( message_string, * ) 'wrong component: ', component
[1826]	1062	CALL message( 'pcm_tendency', 'PA0279', 1, 2, 0, 6, 0 )
[138]	1063
	1064	END SELECT
	1065
[1826]	1066	END SUBROUTINE pcm_tendency
[138]	1067
	1068
	1069	!------------------------------------------------------------------------------!
[1484]	1070	! Description:
	1071	! ------------
[1682]	1072	!> Calculation of the tendency terms, accounting for the effect of the plant
	1073	!> canopy on momentum and scalar quantities.
	1074	!>
	1075	!> The canopy is located where the leaf area density lad_s(k,j,i) > 0.0
[1826]	1076	!> (defined on scalar grid), as initialized in subroutine pcm_init.
[1682]	1077	!> The lad on the w-grid is vertically interpolated from the surrounding
	1078	!> lad_s. The upper boundary of the canopy is defined on the w-grid at
	1079	!> k = pch_index. Here, the lad is zero.
	1080	!>
	1081	!> The canopy drag must be limited (previously accounted for by calculation of
	1082	!> a limiting canopy timestep for the determination of the maximum LES timestep
	1083	!> in subroutine timestep), since it is physically impossible that the canopy
	1084	!> drag alone can locally change the sign of a velocity component. This
	1085	!> limitation is realized by calculating preliminary tendencies and velocities.
	1086	!> It is subsequently checked if the preliminary new velocity has a different
	1087	!> sign than the current velocity. If so, the tendency is limited in a way that
	1088	!> the velocity can at maximum be reduced to zero by the canopy drag.
	1089	!>
	1090	!>
	1091	!> Call for grid point i,j
[138]	1092	!------------------------------------------------------------------------------!
[1826]	1093	SUBROUTINE pcm_tendency_ij( i, j, component )
[138]	1094
	1095
[1320]	1096	USE control_parameters, &
[1484]	1097	ONLY: dt_3d, message_string
[1320]	1098
	1099	USE kinds
	1100
[138]	1101	IMPLICIT NONE
	1102
[1682]	1103	INTEGER(iwp) :: component !< prognostic variable (u,v,w,pt,q,e)
	1104	INTEGER(iwp) :: i !< running index
	1105	INTEGER(iwp) :: j !< running index
	1106	INTEGER(iwp) :: k !< running index
[1721]	1107	INTEGER(iwp) :: kk !< running index for flat lad arrays
[138]	1108
[1682]	1109	REAL(wp) :: ddt_3d !< inverse of the LES timestep (dt_3d)
	1110	REAL(wp) :: lad_local !< local lad value
	1111	REAL(wp) :: pre_tend !< preliminary tendency
	1112	REAL(wp) :: pre_u !< preliminary u-value
	1113	REAL(wp) :: pre_v !< preliminary v-value
	1114	REAL(wp) :: pre_w !< preliminary w-value
[1484]	1115
	1116
	1117	ddt_3d = 1.0_wp / dt_3d
	1118
[138]	1119	!
[1484]	1120	!-- Compute drag for the three velocity components and the SGS-TKE
[142]	1121	SELECT CASE ( component )
[138]	1122
	1123	!
[142]	1124	!-- u-component
[1484]	1125	CASE ( 1 )
[1721]	1126	DO k = nzb_u_inner(j,i)+1, nzb_u_inner(j,i)+pch_index
[138]	1127
[1721]	1128	kk = k - nzb_u_inner(j,i) !- lad arrays are defined flat
[138]	1129	!
[1484]	1130	!-- In order to create sharp boundaries of the plant canopy,
	1131	!-- the lad on the u-grid at index (k,j,i) is equal to lad_s(k,j,i),
	1132	!-- rather than being interpolated from the surrounding lad_s,
	1133	!-- because this would yield smaller lad at the canopy boundaries
	1134	!-- than inside of the canopy.
	1135	!-- For the same reason, the lad at the rightmost(i+1)canopy
	1136	!-- boundary on the u-grid equals lad_s(k,j,i).
[1721]	1137	lad_local = lad_s(kk,j,i)
	1138	IF ( lad_local == 0.0_wp .AND. lad_s(kk,j,i-1) > 0.0_wp ) THEN
	1139	lad_local = lad_s(kk,j,i-1)
[1484]	1140	ENDIF
	1141
	1142	pre_tend = 0.0_wp
	1143	pre_u = 0.0_wp
	1144	!
	1145	!-- Calculate preliminary value (pre_tend) of the tendency
	1146	pre_tend = - cdc * &
	1147	lad_local * &
	1148	SQRT( u(k,j,i)**2 + &
	1149	( 0.25_wp * ( v(k,j,i-1) + &
	1150	v(k,j,i) + &
	1151	v(k,j+1,i) + &
	1152	v(k,j+1,i-1) ) &
	1153	)**2 + &
	1154	( 0.25_wp * ( w(k-1,j,i-1) + &
	1155	w(k-1,j,i) + &
	1156	w(k,j,i-1) + &
	1157	w(k,j,i) ) &
	1158	)**2 &
	1159	) * &
	1160	u(k,j,i)
	1161
	1162	!
	1163	!-- Calculate preliminary new velocity, based on pre_tend
	1164	pre_u = u(k,j,i) + dt_3d * pre_tend
	1165	!
	1166	!-- Compare sign of old velocity and new preliminary velocity,
	1167	!-- and in case the signs are different, limit the tendency
	1168	IF ( SIGN(pre_u,u(k,j,i)) /= pre_u ) THEN
	1169	pre_tend = - u(k,j,i) * ddt_3d
	1170	ELSE
	1171	pre_tend = pre_tend
	1172	ENDIF
	1173	!
	1174	!-- Calculate final tendency
	1175	tend(k,j,i) = tend(k,j,i) + pre_tend
	1176	ENDDO
	1177
	1178
	1179	!
[142]	1180	!-- v-component
[1484]	1181	CASE ( 2 )
[1721]	1182	DO k = nzb_v_inner(j,i)+1, nzb_v_inner(j,i)+pch_index
[138]	1183
[1721]	1184	kk = k - nzb_v_inner(j,i) !- lad arrays are defined flat
[138]	1185	!
[1484]	1186	!-- In order to create sharp boundaries of the plant canopy,
	1187	!-- the lad on the v-grid at index (k,j,i) is equal to lad_s(k,j,i),
	1188	!-- rather than being interpolated from the surrounding lad_s,
	1189	!-- because this would yield smaller lad at the canopy boundaries
	1190	!-- than inside of the canopy.
	1191	!-- For the same reason, the lad at the northmost(j+1)canopy
	1192	!-- boundary on the v-grid equals lad_s(k,j,i).
[1721]	1193	lad_local = lad_s(kk,j,i)
	1194	IF ( lad_local == 0.0_wp .AND. lad_s(kk,j-1,i) > 0.0_wp ) THEN
	1195	lad_local = lad_s(kk,j-1,i)
[1484]	1196	ENDIF
	1197
	1198	pre_tend = 0.0_wp
	1199	pre_v = 0.0_wp
	1200	!
	1201	!-- Calculate preliminary value (pre_tend) of the tendency
	1202	pre_tend = - cdc * &
	1203	lad_local * &
	1204	SQRT( ( 0.25_wp * ( u(k,j-1,i) + &
	1205	u(k,j-1,i+1) + &
	1206	u(k,j,i) + &
	1207	u(k,j,i+1) ) &
	1208	)**2 + &
	1209	v(k,j,i)**2 + &
	1210	( 0.25_wp * ( w(k-1,j-1,i) + &
	1211	w(k-1,j,i) + &
	1212	w(k,j-1,i) + &
	1213	w(k,j,i) ) &
	1214	)**2 &
	1215	) * &
	1216	v(k,j,i)
	1217
	1218	!
	1219	!-- Calculate preliminary new velocity, based on pre_tend
	1220	pre_v = v(k,j,i) + dt_3d * pre_tend
	1221	!
	1222	!-- Compare sign of old velocity and new preliminary velocity,
	1223	!-- and in case the signs are different, limit the tendency
	1224	IF ( SIGN(pre_v,v(k,j,i)) /= pre_v ) THEN
	1225	pre_tend = - v(k,j,i) * ddt_3d
	1226	ELSE
	1227	pre_tend = pre_tend
	1228	ENDIF
	1229	!
	1230	!-- Calculate final tendency
	1231	tend(k,j,i) = tend(k,j,i) + pre_tend
	1232	ENDDO
	1233
	1234
	1235	!
[142]	1236	!-- w-component
[1484]	1237	CASE ( 3 )
[1721]	1238	DO k = nzb_w_inner(j,i)+1, nzb_w_inner(j,i)+pch_index-1
[138]	1239
[1721]	1240	kk = k - nzb_w_inner(j,i) !- lad arrays are defined flat
	1241
[1484]	1242	pre_tend = 0.0_wp
	1243	pre_w = 0.0_wp
[138]	1244	!
[1484]	1245	!-- Calculate preliminary value (pre_tend) of the tendency
	1246	pre_tend = - cdc * &
	1247	(0.5_wp * &
[1721]	1248	( lad_s(kk+1,j,i) + lad_s(kk,j,i) )) * &
[1484]	1249	SQRT( ( 0.25_wp * ( u(k,j,i) + &
	1250	u(k,j,i+1) + &
	1251	u(k+1,j,i) + &
	1252	u(k+1,j,i+1) ) &
	1253	)**2 + &
	1254	( 0.25_wp * ( v(k,j,i) + &
	1255	v(k,j+1,i) + &
	1256	v(k+1,j,i) + &
	1257	v(k+1,j+1,i) ) &
	1258	)**2 + &
	1259	w(k,j,i)**2 &
	1260	) * &
	1261	w(k,j,i)
	1262	!
	1263	!-- Calculate preliminary new velocity, based on pre_tend
	1264	pre_w = w(k,j,i) + dt_3d * pre_tend
	1265	!
	1266	!-- Compare sign of old velocity and new preliminary velocity,
	1267	!-- and in case the signs are different, limit the tendency
	1268	IF ( SIGN(pre_w,w(k,j,i)) /= pre_w ) THEN
	1269	pre_tend = - w(k,j,i) * ddt_3d
	1270	ELSE
	1271	pre_tend = pre_tend
	1272	ENDIF
	1273	!
	1274	!-- Calculate final tendency
	1275	tend(k,j,i) = tend(k,j,i) + pre_tend
	1276	ENDDO
	1277
	1278	!
[153]	1279	!-- potential temperature
	1280	CASE ( 4 )
[1721]	1281	DO k = nzb_s_inner(j,i)+1, nzb_s_inner(j,i)+pch_index
	1282	kk = k - nzb_s_inner(j,i) !- lad arrays are defined flat
[1484]	1283	tend(k,j,i) = tend(k,j,i) + &
[1721]	1284	( canopy_heat_flux(kk,j,i) - &
	1285	canopy_heat_flux(kk-1,j,i) ) / dzw(k)
[153]	1286	ENDDO
	1287
	1288
	1289	!
[1960]	1290	!-- humidity
[153]	1291	CASE ( 5 )
[1721]	1292	DO k = nzb_s_inner(j,i)+1, nzb_s_inner(j,i)+pch_index
	1293	kk = k - nzb_s_inner(j,i) !- lad arrays are defined flat
[1484]	1294	tend(k,j,i) = tend(k,j,i) - &
	1295	lsec * &
[1721]	1296	lad_s(kk,j,i) * &
[1484]	1297	SQRT( ( 0.5_wp * ( u(k,j,i) + &
	1298	u(k,j,i+1) ) &
	1299	)**2 + &
	1300	( 0.5_wp * ( v(k,j,i) + &
	1301	v(k,j+1,i) ) &
	1302	)**2 + &
	1303	( 0.5_wp * ( w(k-1,j,i) + &
	1304	w(k,j,i) ) &
	1305	)**2 &
	1306	) * &
	1307	( q(k,j,i) - lsc )
[153]	1308	ENDDO
	1309
	1310	!
[142]	1311	!-- sgs-tke
[1484]	1312	CASE ( 6 )
[1721]	1313	DO k = nzb_s_inner(j,i)+1, nzb_s_inner(j,i)+pch_index
	1314	kk = k - nzb_s_inner(j,i) !- lad arrays are defined flat
[1484]	1315	tend(k,j,i) = tend(k,j,i) - &
	1316	2.0_wp * cdc * &
[1721]	1317	lad_s(kk,j,i) * &
[1484]	1318	SQRT( ( 0.5_wp * ( u(k,j,i) + &
	1319	u(k,j,i+1) ) &
	1320	)**2 + &
	1321	( 0.5_wp * ( v(k,j,i) + &
	1322	v(k,j+1,i) ) &
	1323	)**2 + &
	1324	( 0.5_wp * ( w(k,j,i) + &
	1325	w(k+1,j,i) ) &
	1326	)**2 &
	1327	) * &
	1328	e(k,j,i)
	1329	ENDDO
[1960]	1330
	1331	!
	1332	!-- scalar concentration
	1333	CASE ( 7 )
	1334	DO k = nzb_s_inner(j,i)+1, nzb_s_inner(j,i)+pch_index
	1335	kk = k - nzb_s_inner(j,i) !- lad arrays are defined flat
	1336	tend(k,j,i) = tend(k,j,i) - &
	1337	lsec * &
	1338	lad_s(kk,j,i) * &
	1339	SQRT( ( 0.5_wp * ( u(k,j,i) + &
	1340	u(k,j,i+1) ) &
	1341	)**2 + &
	1342	( 0.5_wp * ( v(k,j,i) + &
	1343	v(k,j+1,i) ) &
	1344	)**2 + &
	1345	( 0.5_wp * ( w(k-1,j,i) + &
	1346	w(k,j,i) ) &
	1347	)**2 &
	1348	) * &
	1349	( s(k,j,i) - lsc )
	1350	ENDDO
[138]	1351
[142]	1352	CASE DEFAULT
[138]	1353
[257]	1354	WRITE( message_string, * ) 'wrong component: ', component
[1826]	1355	CALL message( 'pcm_tendency', 'PA0279', 1, 2, 0, 6, 0 )
[138]	1356
[142]	1357	END SELECT
[138]	1358
[1826]	1359	END SUBROUTINE pcm_tendency_ij
[138]	1360
[2007]	1361
	1362
[138]	1363	END MODULE plant_canopy_model_mod

Note: See TracBrowser for help on using the repository browser.

Download in other formats:

| Impressum | ©Leibniz Universität Hannover |