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source: palm/trunk/SOURCE/init_3d_model.f90 @ 63

Last change on this file since 63 was 63, checked in by raasch, 17 years ago
preliminary changes concerning update of BC-scheme
Property svn:keywords set to `Id`
File size: 31.8 KB

Rev	Line
[1]	1	#if defined( __ibmy_special )
	2	@PROCESS NOOPTimize
	3	#endif
	4	SUBROUTINE init_3d_model
	5
	6	!------------------------------------------------------------------------------!
	7	! Actual revisions:
	8	! -----------------
[48]	9	! New initializing action "by_user" calls user_init_3d_model,
[51]	10	! ts_value is allocated, +module netcdf_control,
	11	! initial velocities at nzb+1 are regarded for volume
	12	! flow control in case they have been set zero before (to avoid small timesteps)
[1]	13	!
	14	! Former revisions:
	15	! -----------------
[3]	16	! $Id: init_3d_model.f90 63 2007-03-13 03:52:49Z raasch $
[39]	17	!
	18	! 19 2007-02-23 04:53:48Z raasch
	19	! +handling of top fluxes
	20	!
[3]	21	! RCS Log replace by Id keyword, revision history cleaned up
	22	!
[1]	23	! Revision 1.49 2006/08/22 15:59:07 raasch
	24	! No optimization of this file on the ibmy (Yonsei Univ.)
	25	!
	26	! Revision 1.1 1998/03/09 16:22:22 raasch
	27	! Initial revision
	28	!
	29	!
	30	! Description:
	31	! ------------
	32	! Allocation of arrays and initialization of the 3D model via
	33	! a) pre-run the 1D model
	34	! or
	35	! b) pre-set constant linear profiles
	36	! or
	37	! c) read values of a previous run
	38	!------------------------------------------------------------------------------!
	39
	40	USE arrays_3d
	41	USE averaging
	42	USE constants
	43	USE control_parameters
	44	USE cpulog
	45	USE indices
	46	USE interfaces
	47	USE model_1d
[51]	48	USE netcdf_control
[1]	49	USE particle_attributes
	50	USE pegrid
	51	USE profil_parameter
	52	USE random_function_mod
	53	USE statistics
	54
	55	IMPLICIT NONE
	56
	57	INTEGER :: i, j, k, sr
	58
	59	INTEGER, DIMENSION(:), ALLOCATABLE :: ngp_2dh_l, ngp_3d_inner_l
	60
	61	INTEGER, DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_outer_l
	62
	63	REAL, DIMENSION(1:2) :: volume_flow_area_l, volume_flow_initial_l
	64
	65
	66	!
	67	!-- Allocate arrays
	68	ALLOCATE( ngp_2dh(0:statistic_regions), ngp_2dh_l(0:statistic_regions), &
	69	ngp_3d(0:statistic_regions), &
	70	ngp_3d_inner(0:statistic_regions), &
	71	ngp_3d_inner_l(0:statistic_regions), &
	72	sums_divnew_l(0:statistic_regions), &
	73	sums_divold_l(0:statistic_regions) )
	74	ALLOCATE( rdf(nzb+1:nzt), uvmean_outflow(nzb:nzt+1), &
	75	uvmean_outflow_l(nzb:nzt+1) )
	76	ALLOCATE( hom_sum(nzb:nzt+1,var_hom,0:statistic_regions), &
	77	ngp_2dh_outer(nzb:nzt+1,0:statistic_regions), &
	78	ngp_2dh_outer_l(nzb:nzt+1,0:statistic_regions), &
	79	rmask(nys-1:nyn+1,nxl-1:nxr+1,0:statistic_regions), &
	80	sums(nzb:nzt+1,var_sum), &
	81	sums_l(nzb:nzt+1,var_sum,0:threads_per_task-1), &
	82	sums_l_l(nzb:nzt+1,0:statistic_regions,0:threads_per_task-1), &
	83	sums_up_fraction_l(10,3,0:statistic_regions), &
[48]	84	sums_wsts_bc_l(nzb:nzt+1,0:statistic_regions), &
	85	ts_value(var_ts,0:statistic_regions) )
[1]	86	ALLOCATE( km_damp_x(nxl-1:nxr+1), km_damp_y(nys-1:nyn+1) )
	87
[19]	88	ALLOCATE( rif_1(nys-1:nyn+1,nxl-1:nxr+1), shf_1(nys-1:nyn+1,nxl-1:nxr+1), &
	89	ts(nys-1:nyn+1,nxl-1:nxr+1), tswst_1(nys-1:nyn+1,nxl-1:nxr+1), &
	90	us(nys-1:nyn+1,nxl-1:nxr+1), usws_1(nys-1:nyn+1,nxl-1:nxr+1), &
	91	vsws_1(nys-1:nyn+1,nxl-1:nxr+1), z0(nys-1:nyn+1,nxl-1:nxr+1) )
[1]	92
	93	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
	94	!
	95	!-- Leapfrog scheme needs two timelevels of diffusion quantities
[19]	96	ALLOCATE( rif_2(nys-1:nyn+1,nxl-1:nxr+1), &
	97	shf_2(nys-1:nyn+1,nxl-1:nxr+1), &
	98	tswst_2(nys-1:nyn+1,nxl-1:nxr+1), &
	99	usws_2(nys-1:nyn+1,nxl-1:nxr+1), &
[1]	100	vsws_2(nys-1:nyn+1,nxl-1:nxr+1) )
	101	ENDIF
	102
	103	ALLOCATE( d(nzb+1:nzta,nys:nyna,nxl:nxra), &
	104	e_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	105	e_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	106	e_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	107	kh_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	108	km_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	109	p(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	110	pt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	111	pt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	112	pt_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	113	tend(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	114	u_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1+uxrp), &
	115	u_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1+uxrp), &
	116	u_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1+uxrp), &
	117	v_1(nzb:nzt+1,nys-1:nyn+1+vynp,nxl-1:nxr+1), &
	118	v_2(nzb:nzt+1,nys-1:nyn+1+vynp,nxl-1:nxr+1), &
	119	v_3(nzb:nzt+1,nys-1:nyn+1+vynp,nxl-1:nxr+1), &
	120	w_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	121	w_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	122	w_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
	123
	124	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
	125	ALLOCATE( kh_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	126	km_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
	127	ENDIF
	128
	129	IF ( moisture .OR. passive_scalar ) THEN
	130	!
	131	!-- 2D-moisture/scalar arrays
	132	ALLOCATE ( qs(nys-1:nyn+1,nxl-1:nxr+1), &
[19]	133	qsws_1(nys-1:nyn+1,nxl-1:nxr+1), &
	134	qswst_1(nys-1:nyn+1,nxl-1:nxr+1) )
[1]	135
	136	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
[19]	137	ALLOCATE( qsws_2(nys-1:nyn+1,nxl-1:nxr+1), &
	138	qswst_2(nys-1:nyn+1,nxl-1:nxr+1) )
[1]	139	ENDIF
	140	!
	141	!-- 3D-moisture/scalar arrays
	142	ALLOCATE( q_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	143	q_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	144	q_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
	145
	146	!
	147	!-- 3D-arrays needed for moisture only
	148	IF ( moisture ) THEN
	149	ALLOCATE( vpt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
	150
	151	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
	152	ALLOCATE( vpt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
	153	ENDIF
	154
	155	IF ( cloud_physics ) THEN
	156	!
	157	!-- Liquid water content
	158	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
	159	ENDIF
	160
	161	IF ( cloud_droplets ) THEN
	162	!
	163	!-- Liquid water content, change in liquid water content,
	164	!-- real volume of particles (with weighting), volume of particles
	165	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	166	ql_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	167	ql_v(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	168	ql_vp(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
	169	ENDIF
	170
	171	ENDIF
	172
	173	ENDIF
	174
	175	!
	176	!-- 3D-array for storing the dissipation, needed for calculating the sgs
	177	!-- particle velocities
	178	IF ( use_sgs_for_particles ) THEN
	179	ALLOCATE ( diss(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
	180	ENDIF
	181
	182	IF ( dt_dosp /= 9999999.9 ) THEN
	183	ALLOCATE( spectrum_x( 1:nx/2, 1:10, 1:10 ), &
	184	spectrum_y( 1:ny/2, 1:10, 1:10 ) )
	185	ENDIF
	186
	187	!
[51]	188	!-- 4D-array for storing the Rif-values at vertical walls
	189	IF ( topography /= 'flat' ) THEN
	190	ALLOCATE( rif_wall(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1,1:4) )
	191	rif_wall = 0.0
	192	ENDIF
	193
	194	!
	195	!-- Velocities at nzb+1 needed for volume flow control
	196	IF ( conserve_volume_flow ) THEN
	197	ALLOCATE( u_nzb_p1_for_vfc(nys:nyn), v_nzb_p1_for_vfc(nxl:nxr) )
	198	u_nzb_p1_for_vfc = 0.0
	199	v_nzb_p1_for_vfc = 0.0
	200	ENDIF
	201
	202	!
[1]	203	!-- Initial assignment of the pointers
	204	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
	205
[19]	206	rif_m => rif_1; rif => rif_2
	207	shf_m => shf_1; shf => shf_2
	208	tswst_m => tswst_1; tswst => tswst_2
	209	usws_m => usws_1; usws => usws_2
	210	vsws_m => vsws_1; vsws => vsws_2
[1]	211	e_m => e_1; e => e_2; e_p => e_3; te_m => e_3
	212	kh_m => kh_1; kh => kh_2
	213	km_m => km_1; km => km_2
	214	pt_m => pt_1; pt => pt_2; pt_p => pt_3; tpt_m => pt_3
	215	u_m => u_1; u => u_2; u_p => u_3; tu_m => u_3
	216	v_m => v_1; v => v_2; v_p => v_3; tv_m => v_3
	217	w_m => w_1; w => w_2; w_p => w_3; tw_m => w_3
	218
	219	IF ( moisture .OR. passive_scalar ) THEN
[19]	220	qsws_m => qsws_1; qsws => qsws_2
	221	qswst_m => qswst_1; qswst => qswst_2
[1]	222	q_m => q_1; q => q_2; q_p => q_3; tq_m => q_3
	223	IF ( moisture ) vpt_m => vpt_1; vpt => vpt_2
	224	IF ( cloud_physics ) ql => ql_1
	225	IF ( cloud_droplets ) THEN
	226	ql => ql_1
	227	ql_c => ql_2
	228	ENDIF
	229	ENDIF
	230
	231	ELSE
	232
[19]	233	rif => rif_1
	234	shf => shf_1
	235	tswst => tswst_1
	236	usws => usws_1
	237	vsws => vsws_1
	238	e => e_1; e_p => e_2; te_m => e_3; e_m => e_3
	239	kh => kh_1
	240	km => km_1
	241	pt => pt_1; pt_p => pt_2; tpt_m => pt_3; pt_m => pt_3
	242	u => u_1; u_p => u_2; tu_m => u_3; u_m => u_3
	243	v => v_1; v_p => v_2; tv_m => v_3; v_m => v_3
	244	w => w_1; w_p => w_2; tw_m => w_3; w_m => w_3
[1]	245
	246	IF ( moisture .OR. passive_scalar ) THEN
	247	qsws => qsws_1
[19]	248	qswst => qswst_1
[1]	249	q => q_1; q_p => q_2; tq_m => q_3; q_m => q_3
	250	IF ( moisture ) vpt => vpt_1
	251	IF ( cloud_physics ) ql => ql_1
	252	IF ( cloud_droplets ) THEN
	253	ql => ql_1
	254	ql_c => ql_2
	255	ENDIF
	256	ENDIF
	257
	258	ENDIF
	259
	260	!
	261	!-- Initialize model variables
	262	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
	263	!
	264	!-- First model run of a possible job queue.
	265	!-- Initial profiles of the variables must be computes.
	266	IF ( INDEX( initializing_actions, 'set_1d-model_profiles' ) /= 0 ) THEN
	267	!
	268	!-- Use solutions of the 1D model as initial profiles,
	269	!-- start 1D model
	270	CALL init_1d_model
	271	!
	272	!-- Transfer initial profiles to the arrays of the 3D model
	273	DO i = nxl-1, nxr+1
	274	DO j = nys-1, nyn+1
	275	e(:,j,i) = e1d
	276	kh(:,j,i) = kh1d
	277	km(:,j,i) = km1d
	278	pt(:,j,i) = pt_init
	279	ENDDO
	280	ENDDO
	281	DO i = nxl-1, nxr+uxrp+1
	282	DO j = nys-1, nyn+1
	283	u(:,j,i) = u1d
	284	ENDDO
	285	ENDDO
	286	DO i = nxl-1, nxr+1
	287	DO j = nys-1, nyn+vynp+1
	288	v(:,j,i) = v1d
	289	ENDDO
	290	ENDDO
	291
	292	IF ( moisture .OR. passive_scalar ) THEN
	293	DO i = nxl-1, nxr+1
	294	DO j = nys-1, nyn+1
	295	q(:,j,i) = q_init
	296	ENDDO
	297	ENDDO
	298	ENDIF
	299
	300	IF ( .NOT. constant_diffusion ) THEN
	301	DO i = nxl-1, nxr+1
	302	DO j = nys-1, nyn+1
	303	e(:,j,i) = e1d
	304	ENDDO
	305	ENDDO
	306	!
	307	!-- Store initial profiles for output purposes etc.
	308	hom(:,1,25,:) = SPREAD( l1d, 2, statistic_regions+1 )
	309
	310	IF ( prandtl_layer ) THEN
	311	rif = rif1d(nzb+1)
	312	ts = 0.0 ! could actually be computed more accurately in the
	313	! 1D model. Update when opportunity arises.
	314	us = us1d
	315	usws = usws1d
	316	vsws = vsws1d
	317	ELSE
	318	ts = 0.0 ! must be set, because used in
	319	rif = 0.0 ! flowste
	320	us = 0.0
	321	usws = 0.0
	322	vsws = 0.0
	323	ENDIF
	324
	325	ELSE
	326	e = 0.0 ! must be set, because used in
	327	rif = 0.0 ! flowste
	328	ts = 0.0
	329	us = 0.0
	330	usws = 0.0
	331	vsws = 0.0
	332	ENDIF
	333
	334	!
	335	!-- In every case qs = 0.0 (see also pt)
	336	!-- This could actually be computed more accurately in the 1D model.
	337	!-- Update when opportunity arises!
	338	IF ( moisture .OR. passive_scalar ) qs = 0.0
	339
	340	!
	341	!-- inside buildings set velocities back to zero
	342	IF ( topography /= 'flat' ) THEN
	343	DO i = nxl-1, nxr+1
	344	DO j = nys-1, nyn+1
	345	u(nzb:nzb_u_inner(j,i),j,i) = 0.0
	346	v(nzb:nzb_v_inner(j,i),j,i) = 0.0
	347	ENDDO
	348	ENDDO
	349	!
	350	!-- WARNING: The extra boundary conditions set after running the
	351	!-- ------- 1D model impose an error on the divergence one layer
	352	!-- below the topography; need to correct later
	353	!-- ATTENTION: Provisional correction for Piacsek & Williams
	354	!-- --------- advection scheme: keep u and v zero one layer below
	355	!-- the topography.
	356	IF ( ibc_uv_b == 0 ) THEN
	357	!
	358	!-- Satisfying the Dirichlet condition with an extra layer below
	359	!-- the surface where the u and v component change their sign.
	360	DO i = nxl-1, nxr+1
	361	DO j = nys-1, nyn+1
	362	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = -u(1,j,i)
	363	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = -v(1,j,i)
	364	ENDDO
	365	ENDDO
	366
	367	ELSE
	368	!
	369	!-- Neumann condition
	370	DO i = nxl-1, nxr+1
	371	DO j = nys-1, nyn+1
	372	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = u(1,j,i)
	373	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = v(1,j,i)
	374	ENDDO
	375	ENDDO
	376
	377	ENDIF
	378
	379	ENDIF
	380
	381	ELSEIF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) &
	382	THEN
	383	!
	384	!-- Use constructed initial profiles (velocity constant with height,
	385	!-- temperature profile with constant gradient)
	386	DO i = nxl-1, nxr+1
	387	DO j = nys-1, nyn+1
	388	pt(:,j,i) = pt_init
	389	ENDDO
	390	ENDDO
	391	DO i = nxl-1, nxr+uxrp+1
	392	DO j = nys-1, nyn+1
	393	u(:,j,i) = u_init
	394	ENDDO
	395	ENDDO
	396	DO i = nxl-1, nxr+1
	397	DO j = nys-1, nyn+vynp+1
	398	v(:,j,i) = v_init
	399	ENDDO
	400	ENDDO
	401	!
[51]	402	!-- Set initial horizontal velocities at the lowest computational grid levels
	403	!-- to zero in order to avoid too small time steps caused by the diffusion
[1]	404	!-- limit in the initial phase of a run (at k=1, dz/2 occurs in the
[51]	405	!-- limiting formula!). The original values are stored to be later used for
	406	!-- volume flow control.
[1]	407	DO i = nxl-1, nxr+1
	408	DO j = nys-1, nyn+1
	409	u(nzb:nzb_u_inner(j,i)+1,j,i) = 0.0
	410	v(nzb:nzb_v_inner(j,i)+1,j,i) = 0.0
	411	ENDDO
	412	ENDDO
[51]	413	IF ( conserve_volume_flow ) THEN
	414	IF ( nxr == nx ) THEN
	415	DO j = nys, nyn
	416	k = nzb_u_inner(j,nx) + 1
	417	u_nzb_p1_for_vfc(j) = u_init(k) * dzu(k)
	418	ENDDO
	419	ENDIF
	420	IF ( nyn == ny ) THEN
	421	DO i = nxl, nxr
	422	k = nzb_v_inner(ny,i) + 1
	423	v_nzb_p1_for_vfc(i) = v_init(k) * dzu(k)
	424	ENDDO
	425	ENDIF
	426	ENDIF
[1]	427
	428	IF ( moisture .OR. passive_scalar ) THEN
	429	DO i = nxl-1, nxr+1
	430	DO j = nys-1, nyn+1
	431	q(:,j,i) = q_init
	432	ENDDO
	433	ENDDO
	434	ENDIF
	435
	436
	437	IF ( constant_diffusion ) THEN
	438	km = km_constant
	439	kh = km / prandtl_number
	440	ELSE
	441	kh = 0.01 ! there must exist an initial diffusion, because
	442	km = 0.01 ! otherwise no TKE would be produced by the
	443	! production terms, as long as not yet
	444	! e = (u/cm)*2 at k=nzb+1
	445	ENDIF
	446	e = 0.0
	447	rif = 0.0
	448	ts = 0.0
	449	us = 0.0
	450	usws = 0.0
	451	vsws = 0.0
	452	IF ( moisture .OR. passive_scalar ) qs = 0.0
	453
	454	!
	455	!-- Compute initial temperature field and other constants used in case
	456	!-- of a sloping surface
	457	IF ( sloping_surface ) CALL init_slope
	458
[46]	459	ELSEIF ( INDEX(initializing_actions, 'by_user') /= 0 ) &
	460	THEN
	461	!
	462	!-- Initialization will completely be done by the user
	463	CALL user_init_3d_model
	464
[1]	465	ENDIF
	466
	467	!
	468	!-- Calculate virtual potential temperature
	469	IF ( moisture ) vpt = pt * ( 1.0 + 0.61 * q )
	470
	471	!
	472	!-- Store initial profiles for output purposes etc.
	473	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
	474	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
	475	IF ( ibc_uv_b == 0 ) THEN
	476	hom(nzb,1,5,:) = -hom(nzb+1,1,5,:) ! due to satisfying the Dirichlet
	477	hom(nzb,1,6,:) = -hom(nzb+1,1,6,:) ! condition with an extra layer
	478	! below the surface where the u and v component change their sign
	479	ENDIF
	480	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
	481	hom(:,1,23,:) = SPREAD( km(:,nys,nxl), 2, statistic_regions+1 )
	482	hom(:,1,24,:) = SPREAD( kh(:,nys,nxl), 2, statistic_regions+1 )
	483
	484
	485	IF ( moisture ) THEN
	486	!
	487	!-- Store initial profile of total water content, virtual potential
	488	!-- temperature
	489	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
	490	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
	491	IF ( cloud_physics .OR. cloud_droplets ) THEN
	492	!
	493	!-- Store initial profile of specific humidity and potential
	494	!-- temperature
	495	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
	496	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
	497	ENDIF
	498	ENDIF
	499
	500	IF ( passive_scalar ) THEN
	501	!
	502	!-- Store initial scalar profile
	503	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
	504	ENDIF
	505
	506	!
[19]	507	!-- Initialize fluxes at bottom surface
[1]	508	IF ( use_surface_fluxes ) THEN
	509
	510	IF ( constant_heatflux ) THEN
	511	!
	512	!-- Heat flux is prescribed
	513	IF ( random_heatflux ) THEN
	514	CALL disturb_heatflux
	515	ELSE
	516	shf = surface_heatflux
	517	!
	518	!-- Over topography surface_heatflux is replaced by wall_heatflux(0)
	519	IF ( TRIM( topography ) /= 'flat' ) THEN
	520	DO i = nxl-1, nxr+1
	521	DO j = nys-1, nyn+1
	522	IF ( nzb_s_inner(j,i) /= 0 ) THEN
	523	shf(j,i) = wall_heatflux(0)
	524	ENDIF
	525	ENDDO
	526	ENDDO
	527	ENDIF
	528	ENDIF
	529	IF ( ASSOCIATED( shf_m ) ) shf_m = shf
	530	ENDIF
	531
	532	!
	533	!-- Determine the near-surface water flux
	534	IF ( moisture .OR. passive_scalar ) THEN
	535	IF ( constant_waterflux ) THEN
	536	qsws = surface_waterflux
	537	IF ( ASSOCIATED( qsws_m ) ) qsws_m = qsws
	538	ENDIF
	539	ENDIF
	540
	541	ENDIF
	542
	543	!
[19]	544	!-- Initialize fluxes at top surface
	545	!-- Currently, only the heatflux can be prescribed. The latent flux is
[40]	546	!-- zero in this case!
[19]	547	IF ( use_top_fluxes ) THEN
	548
	549	IF ( constant_top_heatflux ) THEN
	550	!
	551	!-- Heat flux is prescribed
	552	tswst = top_heatflux
	553	IF ( ASSOCIATED( tswst_m ) ) tswst_m = tswst
	554
	555	IF ( moisture .OR. passive_scalar ) THEN
	556	qswst = 0.0
	557	IF ( ASSOCIATED( qswst_m ) ) qswst_m = qswst
	558	ENDIF
	559	ENDIF
	560
	561	ENDIF
	562
	563	!
[1]	564	!-- Initialize Prandtl layer quantities
	565	IF ( prandtl_layer ) THEN
	566
	567	z0 = roughness_length
	568
	569	IF ( .NOT. constant_heatflux ) THEN
	570	!
	571	!-- Surface temperature is prescribed. Here the heat flux cannot be
	572	!-- simply estimated, because therefore rif, u* and theta* would have
	573	!-- to be computed by iteration. This is why the heat flux is assumed
	574	!-- to be zero before the first time step. It approaches its correct
	575	!-- value in the course of the first few time steps.
	576	shf = 0.0
	577	IF ( ASSOCIATED( shf_m ) ) shf_m = 0.0
	578	ENDIF
	579
	580	IF ( moisture .OR. passive_scalar ) THEN
	581	IF ( .NOT. constant_waterflux ) THEN
	582	qsws = 0.0
	583	IF ( ASSOCIATED( qsws_m ) ) qsws_m = 0.0
	584	ENDIF
	585	ENDIF
	586
	587	ENDIF
	588
	589	!
	590	!-- Calculate the initial volume flow at the right and north boundary
	591	IF ( conserve_volume_flow ) THEN
	592
	593	volume_flow_initial_l = 0.0
	594	volume_flow_area_l = 0.0
	595
	596	IF ( nxr == nx ) THEN
	597	DO j = nys, nyn
	598	DO k = nzb_2d(j,nx) + 1, nzt
	599	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
	600	u(k,j,nx) * dzu(k)
	601	volume_flow_area_l(1) = volume_flow_area_l(1) + dzu(k)
	602	ENDDO
[51]	603	!
	604	!-- Correction if velocity at nzb+1 has been set zero further above
	605	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
	606	u_nzb_p1_for_vfc(j)
[1]	607	ENDDO
	608	ENDIF
	609
	610	IF ( nyn == ny ) THEN
	611	DO i = nxl, nxr
	612	DO k = nzb_2d(ny,i) + 1, nzt
	613	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
	614	v(k,ny,i) * dzu(k)
	615	volume_flow_area_l(2) = volume_flow_area_l(2) + dzu(k)
	616	ENDDO
[51]	617	!
	618	!-- Correction if velocity at nzb+1 has been set zero further above
	619	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
	620	v_nzb_p1_for_vfc(i)
[1]	621	ENDDO
	622	ENDIF
	623
	624	#if defined( __parallel )
	625	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
	626	2, MPI_REAL, MPI_SUM, comm2d, ierr )
	627	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
	628	2, MPI_REAL, MPI_SUM, comm2d, ierr )
	629	#else
	630	volume_flow_initial = volume_flow_initial_l
	631	volume_flow_area = volume_flow_area_l
	632	#endif
	633	ENDIF
	634
	635	!
	636	!-- For the moment, perturbation pressure and vertical velocity are zero
	637	p = 0.0; w = 0.0
	638
	639	!
	640	!-- Initialize array sums (must be defined in first call of pres)
	641	sums = 0.0
	642
	643	!
	644	!-- Treating cloud physics, liquid water content is zero at beginning of
	645	!-- the simulation
	646	IF ( cloud_physics ) ql = 0.0
	647
	648	!
	649	!-- Initialize spectra
	650	IF ( dt_dosp /= 9999999.9 ) THEN
	651	spectrum_x = 0.0
	652	spectrum_y = 0.0
	653	ENDIF
	654
	655	!
	656	!-- Impose vortex with vertical axis on the initial velocity profile
	657	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
	658	CALL init_rankine
	659	ENDIF
	660
	661	!
	662	!-- Impose temperature anomaly (advection test only)
	663	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN
	664	CALL init_pt_anomaly
	665	ENDIF
	666
	667	!
	668	!-- If required, change the surface temperature at the start of the 3D run
	669	IF ( pt_surface_initial_change /= 0.0 ) THEN
	670	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
	671	ENDIF
	672
	673	!
	674	!-- If required, change the surface humidity/scalar at the start of the 3D
	675	!-- run
	676	IF ( ( moisture .OR. passive_scalar ) .AND. &
	677	q_surface_initial_change /= 0.0 ) THEN
	678	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
	679	ENDIF
	680
	681	!
	682	!-- Initialize the random number generator (from numerical recipes)
	683	CALL random_function_ini
	684
	685	!
	686	!-- Impose random perturbation on the horizontal velocity field and then
	687	!-- remove the divergences from the velocity field
	688	IF ( create_disturbances ) THEN
	689	CALL disturb_field( nzb_u_inner, tend, u, uxrp, 0 )
	690	CALL disturb_field( nzb_v_inner, tend, v, 0, vynp )
	691	n_sor = nsor_ini
	692	CALL pres
	693	n_sor = nsor
	694	ENDIF
	695
	696	!
	697	!-- Once again set the perturbation pressure explicitly to zero in order to
	698	!-- assure that it does not generate any divergences in the first time step.
	699	!-- At t=0 the velocity field is free of divergence (as constructed above).
	700	!-- Divergences being created during a time step are not yet known and thus
	701	!-- cannot be corrected during the time step yet.
	702	p = 0.0
	703
	704	!
	705	!-- Initialize old and new time levels.
	706	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
	707	e_m = e; pt_m = pt; u_m = u; v_m = v; w_m = w; kh_m = kh; km_m = km
	708	ELSE
	709	te_m = 0.0; tpt_m = 0.0; tu_m = 0.0; tv_m = 0.0; tw_m = 0.0
	710	ENDIF
	711	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
	712
	713	IF ( moisture .OR. passive_scalar ) THEN
	714	IF ( ASSOCIATED( q_m ) ) q_m = q
	715	IF ( timestep_scheme(1:5) == 'runge' ) tq_m = 0.0
	716	q_p = q
	717	IF ( moisture .AND. ASSOCIATED( vpt_m ) ) vpt_m = vpt
	718	ENDIF
	719
	720	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' ) &
	721	THEN
	722	!
	723	!-- Read binary data from restart file
	724	CALL read_3d_binary
	725
	726	!
	727	!-- Calculate initial temperature field and other constants used in case
	728	!-- of a sloping surface
	729	IF ( sloping_surface ) CALL init_slope
	730
	731	!
	732	!-- Initialize new time levels (only done in order to set boundary values
	733	!-- including ghost points)
	734	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
	735	IF ( moisture .OR. passive_scalar ) q_p = q
	736
	737	ELSE
	738	!
	739	!-- Actually this part of the programm should not be reached
	740	IF ( myid == 0 ) PRINT*,'+++ init_3d_model: unknown initializing ', &
	741	'problem'
	742	CALL local_stop
	743	ENDIF
	744
	745	!
	746	!-- If required, initialize dvrp-software
	747	IF ( dt_dvrp /= 9999999.9 ) CALL init_dvrp
	748
	749	!
	750	!-- If required, initialize quantities for handling cloud physics
	751	!-- This routine must be called before init_particles, because
	752	!-- otherwise, array pt_d_t, needed in data_output_dvrp (called by
	753	!-- init_particles) is not defined.
	754	CALL init_cloud_physics
	755
	756	!
	757	!-- If required, initialize particles
[63]	758	IF ( particle_advection ) CALL init_particles
[1]	759
	760	!
	761	!-- Initialize quantities for special advections schemes
	762	CALL init_advec
	763
	764	!
	765	!-- Initialize Rayleigh damping factors
	766	rdf = 0.0
	767	IF ( rayleigh_damping_factor /= 0.0 ) THEN
	768	DO k = nzb+1, nzt
	769	IF ( zu(k) >= rayleigh_damping_height ) THEN
	770	rdf(k) = rayleigh_damping_factor * &
	771	( SIN( pi * 0.5 * ( zu(k) - rayleigh_damping_height ) &
	772	/ ( zu(nzt) - rayleigh_damping_height ) )&
	773	)**2
	774	ENDIF
	775	ENDDO
	776	ENDIF
	777
	778	!
	779	!-- Initialize diffusivities used within the outflow damping layer in case of
	780	!-- non-cyclic lateral boundaries. A linear increase is assumed over the first
	781	!-- half of the width of the damping layer
	782	IF ( bc_lr /= 'cyclic' ) THEN
	783
	784	DO i = nxl-1, nxr+1
	785
	786	IF ( outflow_r ) THEN
	787
	788	IF ( i >= nx - outflow_damping_width ) THEN
	789	km_damp_x(i) = km_damp_max * MIN( 1.0, &
	790	( i - ( nx - outflow_damping_width ) ) / &
	791	REAL( outflow_damping_width/2 ) &
	792	)
	793	ELSE
	794	km_damp_x(i) = 0.0
	795	ENDIF
	796
	797	ELSEIF ( outflow_l ) THEN
	798
	799	IF ( i <= outflow_damping_width ) THEN
	800	km_damp_x(i) = km_damp_max * MIN( 1.0, &
	801	( outflow_damping_width - i ) / &
	802	REAL( outflow_damping_width/2 ) &
	803	)
	804	ELSE
	805	km_damp_x(i) = 0.0
	806	ENDIF
	807
	808	ENDIF
	809
	810	ENDDO
	811	ENDIF
	812
	813	IF ( bc_ns /= 'cyclic' ) THEN
	814
	815	DO j = nys-1, nyn+1
	816
	817	IF ( outflow_n ) THEN
	818
	819	IF ( j >= ny - outflow_damping_width ) THEN
	820	km_damp_y(j) = km_damp_max * MIN( 1.0, &
	821	( j - ( ny - outflow_damping_width ) ) / &
	822	REAL( outflow_damping_width/2 ) &
	823	)
	824	ELSE
	825	km_damp_y(j) = 0.0
	826	ENDIF
	827
	828	ELSEIF ( outflow_s ) THEN
	829
	830	IF ( j <= outflow_damping_width ) THEN
	831	km_damp_y(j) = km_damp_max * MIN( 1.0, &
	832	( outflow_damping_width - j ) / &
	833	REAL( outflow_damping_width/2 ) &
	834	)
	835	ELSE
	836	km_damp_y(j) = 0.0
	837	ENDIF
	838
	839	ENDIF
	840
	841	ENDDO
	842	ENDIF
	843
	844	!
	845	!-- Initialize local summation arrays for UP flow_statistics. This is necessary
	846	!-- because they may not yet have been initialized when they are called from
	847	!-- flow_statistics (or - depending on the chosen model run - are never
	848	!-- initialized)
	849	sums_divnew_l = 0.0
	850	sums_divold_l = 0.0
	851	sums_l_l = 0.0
	852	sums_up_fraction_l = 0.0
	853	sums_wsts_bc_l = 0.0
	854
	855	!
	856	!-- Pre-set masks for regional statistics. Default is the total model domain.
	857	rmask = 1.0
	858
	859	!
[51]	860	!-- User-defined initializing actions. Check afterwards, if maximum number
	861	!-- of allowed timeseries is not exceeded
[1]	862	CALL user_init
	863
[51]	864	IF ( dots_num > dots_max ) THEN
	865	IF ( myid == 0 ) THEN
	866	PRINT*, '+++ user_init: number of time series quantities exceeds', &
	867	' its maximum of dots_max = ', dots_max
	868	PRINT*, ' Please increase dots_max in modules.f90.'
	869	ENDIF
	870	CALL local_stop
	871	ENDIF
	872
[1]	873	!
	874	!-- Input binary data file is not needed anymore. This line must be placed
	875	!-- after call of user_init!
	876	CALL close_file( 13 )
	877
	878	!
	879	!-- Compute total sum of active mask grid points
	880	!-- ngp_2dh: number of grid points of a horizontal cross section through the
	881	!-- total domain
	882	!-- ngp_3d: number of grid points of the total domain
	883	!-- Note: The lower vertical index nzb_s_outer imposes a small error on the 2D
	884	!-- ---- averages of staggered variables such as u and v due to the topography
	885	!-- arrangement on the staggered grid. Maybe revise later.
	886	ngp_2dh_outer_l = 0
	887	ngp_2dh_outer = 0
	888	ngp_2dh_l = 0
	889	ngp_2dh = 0
	890	ngp_3d_inner_l = 0
	891	ngp_3d_inner = 0
	892	ngp_3d = 0
	893	ngp_sums = ( nz + 2 ) * var_sum
	894
	895	DO sr = 0, statistic_regions
	896	DO i = nxl, nxr
	897	DO j = nys, nyn
	898	IF ( rmask(j,i,sr) == 1.0 ) THEN
	899	!
	900	!-- All xy-grid points
	901	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
	902	!
	903	!-- xy-grid points above topography
	904	DO k = nzb_s_outer(j,i), nz + 1
	905	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + 1
	906	ENDDO
	907	!
	908	!-- All grid points of the total domain above topography
	909	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) + &
	910	( nz - nzb_s_inner(j,i) + 2 )
	911	ENDIF
	912	ENDDO
	913	ENDDO
	914	ENDDO
	915
	916	sr = statistic_regions + 1
	917	#if defined( __parallel )
	918	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, &
	919	comm2d, ierr )
	920	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, &
	921	MPI_INTEGER, MPI_SUM, comm2d, ierr )
	922	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner(0), sr, MPI_INTEGER, &
	923	MPI_SUM, comm2d, ierr )
	924	#else
	925	ngp_2dh = ngp_2dh_l
	926	ngp_2dh_outer = ngp_2dh_outer_l
	927	ngp_3d_inner = ngp_3d_inner_l
	928	#endif
	929
	930	ngp_3d = ngp_2dh * ( nz + 2 )
	931
	932	!
	933	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics,
	934	!-- buoyancy, etc. A zero value will occur for cases where all grid points of
	935	!-- the respective subdomain lie below the surface topography
	936	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
	937	ngp_3d_inner = MAX( 1, ngp_3d_inner(:) )
	938
	939	DEALLOCATE( ngp_2dh_l, ngp_2dh_outer_l, ngp_3d_inner_l )
	940
	941
	942	END SUBROUTINE init_3d_model

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