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source: palm/trunk/SOURCE/init_3d_model.f90 @ 46

Last change on this file since 46 was 46, checked in by raasch, 18 years ago
updating parts of Marcus changes
Property svn:keywords set to `Id`
File size: 30.0 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	! -----------------
[46]	9	! New initializing action "by_user" calls user_init_3d_model
[1]	10	!
	11	! Former revisions:
	12	! -----------------
[3]	13	! $Id: init_3d_model.f90 46 2007-03-05 06:00:47Z raasch $
[39]	14	!
	15	! 19 2007-02-23 04:53:48Z raasch
	16	! +handling of top fluxes
	17	!
[3]	18	! RCS Log replace by Id keyword, revision history cleaned up
	19	!
[1]	20	! Revision 1.49 2006/08/22 15:59:07 raasch
	21	! No optimization of this file on the ibmy (Yonsei Univ.)
	22	!
	23	! Revision 1.1 1998/03/09 16:22:22 raasch
	24	! Initial revision
	25	!
	26	!
	27	! Description:
	28	! ------------
	29	! Allocation of arrays and initialization of the 3D model via
	30	! a) pre-run the 1D model
	31	! or
	32	! b) pre-set constant linear profiles
	33	! or
	34	! c) read values of a previous run
	35	!------------------------------------------------------------------------------!
	36
	37	USE arrays_3d
	38	USE averaging
	39	USE constants
	40	USE control_parameters
	41	USE cpulog
	42	USE indices
	43	USE interfaces
	44	USE model_1d
	45	USE particle_attributes
	46	USE pegrid
	47	USE profil_parameter
	48	USE random_function_mod
	49	USE statistics
	50
	51	IMPLICIT NONE
	52
	53	INTEGER :: i, j, k, sr
	54
	55	INTEGER, DIMENSION(:), ALLOCATABLE :: ngp_2dh_l, ngp_3d_inner_l
	56
	57	INTEGER, DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_outer_l
	58
	59	REAL, DIMENSION(1:2) :: volume_flow_area_l, volume_flow_initial_l
	60
	61
	62	!
	63	!-- Allocate arrays
	64	ALLOCATE( ngp_2dh(0:statistic_regions), ngp_2dh_l(0:statistic_regions), &
	65	ngp_3d(0:statistic_regions), &
	66	ngp_3d_inner(0:statistic_regions), &
	67	ngp_3d_inner_l(0:statistic_regions), &
	68	sums_divnew_l(0:statistic_regions), &
	69	sums_divold_l(0:statistic_regions) )
	70	ALLOCATE( rdf(nzb+1:nzt), uvmean_outflow(nzb:nzt+1), &
	71	uvmean_outflow_l(nzb:nzt+1) )
	72	ALLOCATE( hom_sum(nzb:nzt+1,var_hom,0:statistic_regions), &
	73	ngp_2dh_outer(nzb:nzt+1,0:statistic_regions), &
	74	ngp_2dh_outer_l(nzb:nzt+1,0:statistic_regions), &
	75	rmask(nys-1:nyn+1,nxl-1:nxr+1,0:statistic_regions), &
	76	sums(nzb:nzt+1,var_sum), &
	77	sums_l(nzb:nzt+1,var_sum,0:threads_per_task-1), &
	78	sums_l_l(nzb:nzt+1,0:statistic_regions,0:threads_per_task-1), &
	79	sums_up_fraction_l(10,3,0:statistic_regions), &
	80	sums_wsts_bc_l(nzb:nzt+1,0:statistic_regions) )
	81	ALLOCATE( km_damp_x(nxl-1:nxr+1), km_damp_y(nys-1:nyn+1) )
	82
[19]	83	ALLOCATE( rif_1(nys-1:nyn+1,nxl-1:nxr+1), shf_1(nys-1:nyn+1,nxl-1:nxr+1), &
	84	ts(nys-1:nyn+1,nxl-1:nxr+1), tswst_1(nys-1:nyn+1,nxl-1:nxr+1), &
	85	us(nys-1:nyn+1,nxl-1:nxr+1), usws_1(nys-1:nyn+1,nxl-1:nxr+1), &
	86	vsws_1(nys-1:nyn+1,nxl-1:nxr+1), z0(nys-1:nyn+1,nxl-1:nxr+1) )
[1]	87
	88	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
	89	!
	90	!-- Leapfrog scheme needs two timelevels of diffusion quantities
[19]	91	ALLOCATE( rif_2(nys-1:nyn+1,nxl-1:nxr+1), &
	92	shf_2(nys-1:nyn+1,nxl-1:nxr+1), &
	93	tswst_2(nys-1:nyn+1,nxl-1:nxr+1), &
	94	usws_2(nys-1:nyn+1,nxl-1:nxr+1), &
[1]	95	vsws_2(nys-1:nyn+1,nxl-1:nxr+1) )
	96	ENDIF
	97
	98	ALLOCATE( d(nzb+1:nzta,nys:nyna,nxl:nxra), &
	99	e_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	100	e_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	101	e_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	102	kh_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	103	km_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	104	p(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	105	pt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	106	pt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	107	pt_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	108	tend(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	109	u_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1+uxrp), &
	110	u_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1+uxrp), &
	111	u_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1+uxrp), &
	112	v_1(nzb:nzt+1,nys-1:nyn+1+vynp,nxl-1:nxr+1), &
	113	v_2(nzb:nzt+1,nys-1:nyn+1+vynp,nxl-1:nxr+1), &
	114	v_3(nzb:nzt+1,nys-1:nyn+1+vynp,nxl-1:nxr+1), &
	115	w_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	116	w_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	117	w_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
	118
	119	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
	120	ALLOCATE( kh_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	121	km_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
	122	ENDIF
	123
	124	IF ( moisture .OR. passive_scalar ) THEN
	125	!
	126	!-- 2D-moisture/scalar arrays
	127	ALLOCATE ( qs(nys-1:nyn+1,nxl-1:nxr+1), &
[19]	128	qsws_1(nys-1:nyn+1,nxl-1:nxr+1), &
	129	qswst_1(nys-1:nyn+1,nxl-1:nxr+1) )
[1]	130
	131	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
[19]	132	ALLOCATE( qsws_2(nys-1:nyn+1,nxl-1:nxr+1), &
	133	qswst_2(nys-1:nyn+1,nxl-1:nxr+1) )
[1]	134	ENDIF
	135	!
	136	!-- 3D-moisture/scalar arrays
	137	ALLOCATE( q_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	138	q_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	139	q_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
	140
	141	!
	142	!-- 3D-arrays needed for moisture only
	143	IF ( moisture ) THEN
	144	ALLOCATE( vpt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
	145
	146	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
	147	ALLOCATE( vpt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
	148	ENDIF
	149
	150	IF ( cloud_physics ) THEN
	151	!
	152	!-- Liquid water content
	153	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
	154	ENDIF
	155
	156	IF ( cloud_droplets ) THEN
	157	!
	158	!-- Liquid water content, change in liquid water content,
	159	!-- real volume of particles (with weighting), volume of particles
	160	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	161	ql_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	162	ql_v(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	163	ql_vp(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
	164	ENDIF
	165
	166	ENDIF
	167
	168	ENDIF
	169
	170	!
	171	!-- 3D-array for storing the dissipation, needed for calculating the sgs
	172	!-- particle velocities
	173	IF ( use_sgs_for_particles ) THEN
	174	ALLOCATE ( diss(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
	175	ENDIF
	176
	177	IF ( dt_dosp /= 9999999.9 ) THEN
	178	ALLOCATE( spectrum_x( 1:nx/2, 1:10, 1:10 ), &
	179	spectrum_y( 1:ny/2, 1:10, 1:10 ) )
	180	ENDIF
	181
	182	!
	183	!-- Initial assignment of the pointers
	184	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
	185
[19]	186	rif_m => rif_1; rif => rif_2
	187	shf_m => shf_1; shf => shf_2
	188	tswst_m => tswst_1; tswst => tswst_2
	189	usws_m => usws_1; usws => usws_2
	190	vsws_m => vsws_1; vsws => vsws_2
[1]	191	e_m => e_1; e => e_2; e_p => e_3; te_m => e_3
	192	kh_m => kh_1; kh => kh_2
	193	km_m => km_1; km => km_2
	194	pt_m => pt_1; pt => pt_2; pt_p => pt_3; tpt_m => pt_3
	195	u_m => u_1; u => u_2; u_p => u_3; tu_m => u_3
	196	v_m => v_1; v => v_2; v_p => v_3; tv_m => v_3
	197	w_m => w_1; w => w_2; w_p => w_3; tw_m => w_3
	198
	199	IF ( moisture .OR. passive_scalar ) THEN
[19]	200	qsws_m => qsws_1; qsws => qsws_2
	201	qswst_m => qswst_1; qswst => qswst_2
[1]	202	q_m => q_1; q => q_2; q_p => q_3; tq_m => q_3
	203	IF ( moisture ) vpt_m => vpt_1; vpt => vpt_2
	204	IF ( cloud_physics ) ql => ql_1
	205	IF ( cloud_droplets ) THEN
	206	ql => ql_1
	207	ql_c => ql_2
	208	ENDIF
	209	ENDIF
	210
	211	ELSE
	212
[19]	213	rif => rif_1
	214	shf => shf_1
	215	tswst => tswst_1
	216	usws => usws_1
	217	vsws => vsws_1
	218	e => e_1; e_p => e_2; te_m => e_3; e_m => e_3
	219	kh => kh_1
	220	km => km_1
	221	pt => pt_1; pt_p => pt_2; tpt_m => pt_3; pt_m => pt_3
	222	u => u_1; u_p => u_2; tu_m => u_3; u_m => u_3
	223	v => v_1; v_p => v_2; tv_m => v_3; v_m => v_3
	224	w => w_1; w_p => w_2; tw_m => w_3; w_m => w_3
[1]	225
	226	IF ( moisture .OR. passive_scalar ) THEN
	227	qsws => qsws_1
[19]	228	qswst => qswst_1
[1]	229	q => q_1; q_p => q_2; tq_m => q_3; q_m => q_3
	230	IF ( moisture ) vpt => vpt_1
	231	IF ( cloud_physics ) ql => ql_1
	232	IF ( cloud_droplets ) THEN
	233	ql => ql_1
	234	ql_c => ql_2
	235	ENDIF
	236	ENDIF
	237
	238	ENDIF
	239
	240	!
	241	!-- Initialize model variables
	242	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
	243	!
	244	!-- First model run of a possible job queue.
	245	!-- Initial profiles of the variables must be computes.
	246	IF ( INDEX( initializing_actions, 'set_1d-model_profiles' ) /= 0 ) THEN
	247	!
	248	!-- Use solutions of the 1D model as initial profiles,
	249	!-- start 1D model
	250	CALL init_1d_model
	251	!
	252	!-- Transfer initial profiles to the arrays of the 3D model
	253	DO i = nxl-1, nxr+1
	254	DO j = nys-1, nyn+1
	255	e(:,j,i) = e1d
	256	kh(:,j,i) = kh1d
	257	km(:,j,i) = km1d
	258	pt(:,j,i) = pt_init
	259	ENDDO
	260	ENDDO
	261	DO i = nxl-1, nxr+uxrp+1
	262	DO j = nys-1, nyn+1
	263	u(:,j,i) = u1d
	264	ENDDO
	265	ENDDO
	266	DO i = nxl-1, nxr+1
	267	DO j = nys-1, nyn+vynp+1
	268	v(:,j,i) = v1d
	269	ENDDO
	270	ENDDO
	271
	272	IF ( moisture .OR. passive_scalar ) THEN
	273	DO i = nxl-1, nxr+1
	274	DO j = nys-1, nyn+1
	275	q(:,j,i) = q_init
	276	ENDDO
	277	ENDDO
	278	ENDIF
	279
	280	IF ( .NOT. constant_diffusion ) THEN
	281	DO i = nxl-1, nxr+1
	282	DO j = nys-1, nyn+1
	283	e(:,j,i) = e1d
	284	ENDDO
	285	ENDDO
	286	!
	287	!-- Store initial profiles for output purposes etc.
	288	hom(:,1,25,:) = SPREAD( l1d, 2, statistic_regions+1 )
	289
	290	IF ( prandtl_layer ) THEN
	291	rif = rif1d(nzb+1)
	292	ts = 0.0 ! could actually be computed more accurately in the
	293	! 1D model. Update when opportunity arises.
	294	us = us1d
	295	usws = usws1d
	296	vsws = vsws1d
	297	ELSE
	298	ts = 0.0 ! must be set, because used in
	299	rif = 0.0 ! flowste
	300	us = 0.0
	301	usws = 0.0
	302	vsws = 0.0
	303	ENDIF
	304
	305	ELSE
	306	e = 0.0 ! must be set, because used in
	307	rif = 0.0 ! flowste
	308	ts = 0.0
	309	us = 0.0
	310	usws = 0.0
	311	vsws = 0.0
	312	ENDIF
	313
	314	!
	315	!-- In every case qs = 0.0 (see also pt)
	316	!-- This could actually be computed more accurately in the 1D model.
	317	!-- Update when opportunity arises!
	318	IF ( moisture .OR. passive_scalar ) qs = 0.0
	319
	320	!
	321	!-- inside buildings set velocities back to zero
	322	IF ( topography /= 'flat' ) THEN
	323	DO i = nxl-1, nxr+1
	324	DO j = nys-1, nyn+1
	325	u(nzb:nzb_u_inner(j,i),j,i) = 0.0
	326	v(nzb:nzb_v_inner(j,i),j,i) = 0.0
	327	ENDDO
	328	ENDDO
	329	!
	330	!-- WARNING: The extra boundary conditions set after running the
	331	!-- ------- 1D model impose an error on the divergence one layer
	332	!-- below the topography; need to correct later
	333	!-- ATTENTION: Provisional correction for Piacsek & Williams
	334	!-- --------- advection scheme: keep u and v zero one layer below
	335	!-- the topography.
	336	IF ( ibc_uv_b == 0 ) THEN
	337	!
	338	!-- Satisfying the Dirichlet condition with an extra layer below
	339	!-- the surface where the u and v component change their sign.
	340	DO i = nxl-1, nxr+1
	341	DO j = nys-1, nyn+1
	342	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = -u(1,j,i)
	343	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = -v(1,j,i)
	344	ENDDO
	345	ENDDO
	346
	347	ELSE
	348	!
	349	!-- Neumann condition
	350	DO i = nxl-1, nxr+1
	351	DO j = nys-1, nyn+1
	352	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = u(1,j,i)
	353	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = v(1,j,i)
	354	ENDDO
	355	ENDDO
	356
	357	ENDIF
	358
	359	ENDIF
	360
	361	ELSEIF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) &
	362	THEN
	363	!
	364	!-- Use constructed initial profiles (velocity constant with height,
	365	!-- temperature profile with constant gradient)
	366	DO i = nxl-1, nxr+1
	367	DO j = nys-1, nyn+1
	368	pt(:,j,i) = pt_init
	369	ENDDO
	370	ENDDO
	371	DO i = nxl-1, nxr+uxrp+1
	372	DO j = nys-1, nyn+1
	373	u(:,j,i) = u_init
	374	ENDDO
	375	ENDDO
	376	DO i = nxl-1, nxr+1
	377	DO j = nys-1, nyn+vynp+1
	378	v(:,j,i) = v_init
	379	ENDDO
	380	ENDDO
	381	!
	382	!-- Set initial horizontal velocities at the lowest grid levels to zero
	383	!-- in order to avoid too small time steps caused by the diffusion
	384	!-- limit in the initial phase of a run (at k=1, dz/2 occurs in the
	385	!-- limiting formula!)
	386	DO i = nxl-1, nxr+1
	387	DO j = nys-1, nyn+1
	388	u(nzb:nzb_u_inner(j,i)+1,j,i) = 0.0
	389	v(nzb:nzb_v_inner(j,i)+1,j,i) = 0.0
	390	ENDDO
	391	ENDDO
	392
	393	IF ( moisture .OR. passive_scalar ) THEN
	394	DO i = nxl-1, nxr+1
	395	DO j = nys-1, nyn+1
	396	q(:,j,i) = q_init
	397	ENDDO
	398	ENDDO
	399	ENDIF
	400
	401
	402	IF ( constant_diffusion ) THEN
	403	km = km_constant
	404	kh = km / prandtl_number
	405	ELSE
	406	kh = 0.01 ! there must exist an initial diffusion, because
	407	km = 0.01 ! otherwise no TKE would be produced by the
	408	! production terms, as long as not yet
	409	! e = (u/cm)*2 at k=nzb+1
	410	ENDIF
	411	e = 0.0
	412	rif = 0.0
	413	ts = 0.0
	414	us = 0.0
	415	usws = 0.0
	416	vsws = 0.0
	417	IF ( moisture .OR. passive_scalar ) qs = 0.0
	418
	419	!
	420	!-- Compute initial temperature field and other constants used in case
	421	!-- of a sloping surface
	422	IF ( sloping_surface ) CALL init_slope
	423
[46]	424	ELSEIF ( INDEX(initializing_actions, 'by_user') /= 0 ) &
	425	THEN
	426	!
	427	!-- Initialization will completely be done by the user
	428	CALL user_init_3d_model
	429
[1]	430	ENDIF
	431
	432	!
	433	!-- Calculate virtual potential temperature
	434	IF ( moisture ) vpt = pt * ( 1.0 + 0.61 * q )
	435
	436	!
	437	!-- Store initial profiles for output purposes etc.
	438	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
	439	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
	440	IF ( ibc_uv_b == 0 ) THEN
	441	hom(nzb,1,5,:) = -hom(nzb+1,1,5,:) ! due to satisfying the Dirichlet
	442	hom(nzb,1,6,:) = -hom(nzb+1,1,6,:) ! condition with an extra layer
	443	! below the surface where the u and v component change their sign
	444	ENDIF
	445	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
	446	hom(:,1,23,:) = SPREAD( km(:,nys,nxl), 2, statistic_regions+1 )
	447	hom(:,1,24,:) = SPREAD( kh(:,nys,nxl), 2, statistic_regions+1 )
	448
	449
	450	IF ( moisture ) THEN
	451	!
	452	!-- Store initial profile of total water content, virtual potential
	453	!-- temperature
	454	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
	455	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
	456	IF ( cloud_physics .OR. cloud_droplets ) THEN
	457	!
	458	!-- Store initial profile of specific humidity and potential
	459	!-- temperature
	460	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
	461	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
	462	ENDIF
	463	ENDIF
	464
	465	IF ( passive_scalar ) THEN
	466	!
	467	!-- Store initial scalar profile
	468	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
	469	ENDIF
	470
	471	!
[19]	472	!-- Initialize fluxes at bottom surface
[1]	473	IF ( use_surface_fluxes ) THEN
	474
	475	IF ( constant_heatflux ) THEN
	476	!
	477	!-- Heat flux is prescribed
	478	IF ( random_heatflux ) THEN
	479	CALL disturb_heatflux
	480	ELSE
	481	shf = surface_heatflux
	482	!
	483	!-- Over topography surface_heatflux is replaced by wall_heatflux(0)
	484	IF ( TRIM( topography ) /= 'flat' ) THEN
	485	DO i = nxl-1, nxr+1
	486	DO j = nys-1, nyn+1
	487	IF ( nzb_s_inner(j,i) /= 0 ) THEN
	488	shf(j,i) = wall_heatflux(0)
	489	ENDIF
	490	ENDDO
	491	ENDDO
	492	ENDIF
	493	ENDIF
	494	IF ( ASSOCIATED( shf_m ) ) shf_m = shf
	495	ENDIF
	496
	497	!
	498	!-- Determine the near-surface water flux
	499	IF ( moisture .OR. passive_scalar ) THEN
	500	IF ( constant_waterflux ) THEN
	501	qsws = surface_waterflux
	502	IF ( ASSOCIATED( qsws_m ) ) qsws_m = qsws
	503	ENDIF
	504	ENDIF
	505
	506	ENDIF
	507
	508	!
[19]	509	!-- Initialize fluxes at top surface
	510	!-- Currently, only the heatflux can be prescribed. The latent flux is
[40]	511	!-- zero in this case!
[19]	512	IF ( use_top_fluxes ) THEN
	513
	514	IF ( constant_top_heatflux ) THEN
	515	!
	516	!-- Heat flux is prescribed
	517	tswst = top_heatflux
	518	IF ( ASSOCIATED( tswst_m ) ) tswst_m = tswst
	519
	520	IF ( moisture .OR. passive_scalar ) THEN
	521	qswst = 0.0
	522	IF ( ASSOCIATED( qswst_m ) ) qswst_m = qswst
	523	ENDIF
	524	ENDIF
	525
	526	ENDIF
	527
	528	!
[1]	529	!-- Initialize Prandtl layer quantities
	530	IF ( prandtl_layer ) THEN
	531
	532	z0 = roughness_length
	533
	534	IF ( .NOT. constant_heatflux ) THEN
	535	!
	536	!-- Surface temperature is prescribed. Here the heat flux cannot be
	537	!-- simply estimated, because therefore rif, u* and theta* would have
	538	!-- to be computed by iteration. This is why the heat flux is assumed
	539	!-- to be zero before the first time step. It approaches its correct
	540	!-- value in the course of the first few time steps.
	541	shf = 0.0
	542	IF ( ASSOCIATED( shf_m ) ) shf_m = 0.0
	543	ENDIF
	544
	545	IF ( moisture .OR. passive_scalar ) THEN
	546	IF ( .NOT. constant_waterflux ) THEN
	547	qsws = 0.0
	548	IF ( ASSOCIATED( qsws_m ) ) qsws_m = 0.0
	549	ENDIF
	550	ENDIF
	551
	552	ENDIF
	553
	554	!
	555	!-- Calculate the initial volume flow at the right and north boundary
	556	IF ( conserve_volume_flow ) THEN
	557
	558	volume_flow_initial_l = 0.0
	559	volume_flow_area_l = 0.0
	560
	561	IF ( nxr == nx ) THEN
	562	DO j = nys, nyn
	563	DO k = nzb_2d(j,nx) + 1, nzt
	564	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
	565	u(k,j,nx) * dzu(k)
	566	volume_flow_area_l(1) = volume_flow_area_l(1) + dzu(k)
	567	ENDDO
	568	ENDDO
	569	ENDIF
	570
	571	IF ( nyn == ny ) THEN
	572	DO i = nxl, nxr
	573	DO k = nzb_2d(ny,i) + 1, nzt
	574	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
	575	v(k,ny,i) * dzu(k)
	576	volume_flow_area_l(2) = volume_flow_area_l(2) + dzu(k)
	577	ENDDO
	578	ENDDO
	579	ENDIF
	580
	581	#if defined( __parallel )
	582	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
	583	2, MPI_REAL, MPI_SUM, comm2d, ierr )
	584	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
	585	2, MPI_REAL, MPI_SUM, comm2d, ierr )
	586	#else
	587	volume_flow_initial = volume_flow_initial_l
	588	volume_flow_area = volume_flow_area_l
	589	#endif
	590	ENDIF
	591
	592	!
	593	!-- For the moment, perturbation pressure and vertical velocity are zero
	594	p = 0.0; w = 0.0
	595
	596	!
	597	!-- Initialize array sums (must be defined in first call of pres)
	598	sums = 0.0
	599
	600	!
	601	!-- Treating cloud physics, liquid water content is zero at beginning of
	602	!-- the simulation
	603	IF ( cloud_physics ) ql = 0.0
	604
	605	!
	606	!-- Initialize spectra
	607	IF ( dt_dosp /= 9999999.9 ) THEN
	608	spectrum_x = 0.0
	609	spectrum_y = 0.0
	610	ENDIF
	611
	612	!
	613	!-- Impose vortex with vertical axis on the initial velocity profile
	614	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
	615	CALL init_rankine
	616	ENDIF
	617
	618	!
	619	!-- Impose temperature anomaly (advection test only)
	620	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN
	621	CALL init_pt_anomaly
	622	ENDIF
	623
	624	!
	625	!-- If required, change the surface temperature at the start of the 3D run
	626	IF ( pt_surface_initial_change /= 0.0 ) THEN
	627	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
	628	ENDIF
	629
	630	!
	631	!-- If required, change the surface humidity/scalar at the start of the 3D
	632	!-- run
	633	IF ( ( moisture .OR. passive_scalar ) .AND. &
	634	q_surface_initial_change /= 0.0 ) THEN
	635	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
	636	ENDIF
	637
	638	!
	639	!-- Initialize the random number generator (from numerical recipes)
	640	CALL random_function_ini
	641
	642	!
	643	!-- Impose random perturbation on the horizontal velocity field and then
	644	!-- remove the divergences from the velocity field
	645	IF ( create_disturbances ) THEN
	646	CALL disturb_field( nzb_u_inner, tend, u, uxrp, 0 )
	647	CALL disturb_field( nzb_v_inner, tend, v, 0, vynp )
	648	n_sor = nsor_ini
	649	CALL pres
	650	n_sor = nsor
	651	ENDIF
	652
	653	!
	654	!-- Once again set the perturbation pressure explicitly to zero in order to
	655	!-- assure that it does not generate any divergences in the first time step.
	656	!-- At t=0 the velocity field is free of divergence (as constructed above).
	657	!-- Divergences being created during a time step are not yet known and thus
	658	!-- cannot be corrected during the time step yet.
	659	p = 0.0
	660
	661	!
	662	!-- Initialize old and new time levels.
	663	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
	664	e_m = e; pt_m = pt; u_m = u; v_m = v; w_m = w; kh_m = kh; km_m = km
	665	ELSE
	666	te_m = 0.0; tpt_m = 0.0; tu_m = 0.0; tv_m = 0.0; tw_m = 0.0
	667	ENDIF
	668	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
	669
	670	IF ( moisture .OR. passive_scalar ) THEN
	671	IF ( ASSOCIATED( q_m ) ) q_m = q
	672	IF ( timestep_scheme(1:5) == 'runge' ) tq_m = 0.0
	673	q_p = q
	674	IF ( moisture .AND. ASSOCIATED( vpt_m ) ) vpt_m = vpt
	675	ENDIF
	676
	677	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' ) &
	678	THEN
	679	!
	680	!-- Read binary data from restart file
	681	CALL read_3d_binary
	682
	683	!
	684	!-- Calculate initial temperature field and other constants used in case
	685	!-- of a sloping surface
	686	IF ( sloping_surface ) CALL init_slope
	687
	688	!
	689	!-- Initialize new time levels (only done in order to set boundary values
	690	!-- including ghost points)
	691	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
	692	IF ( moisture .OR. passive_scalar ) q_p = q
	693
	694	ELSE
	695	!
	696	!-- Actually this part of the programm should not be reached
	697	IF ( myid == 0 ) PRINT*,'+++ init_3d_model: unknown initializing ', &
	698	'problem'
	699	CALL local_stop
	700	ENDIF
	701
	702	!
	703	!-- If required, initialize dvrp-software
	704	! WRITE ( 9, * ) '*** myid=', myid, ' vor init_dvrp'
	705	! CALL FLUSH_( 9 )
	706	IF ( dt_dvrp /= 9999999.9 ) CALL init_dvrp
	707	! WRITE ( 9, * ) '*** myid=', myid, ' nach init_dvrp'
	708	! CALL FLUSH_( 9 )
	709
	710	!
	711	!-- If required, initialize quantities for handling cloud physics
	712	!-- This routine must be called before init_particles, because
	713	!-- otherwise, array pt_d_t, needed in data_output_dvrp (called by
	714	!-- init_particles) is not defined.
	715	CALL init_cloud_physics
	716
	717	!
	718	!-- If required, initialize particles
	719	! WRITE ( 9, * ) '*** myid=', myid, ' vor init_particles'
	720	! CALL FLUSH_( 9 )
	721	CALL init_particles
	722	! WRITE ( 9, * ) '*** myid=', myid, ' nach init_particles'
	723	! CALL FLUSH_( 9 )
	724
	725	!
	726	!-- Initialize quantities for special advections schemes
	727	CALL init_advec
	728
	729	!
	730	!-- Initialize Rayleigh damping factors
	731	rdf = 0.0
	732	IF ( rayleigh_damping_factor /= 0.0 ) THEN
	733	DO k = nzb+1, nzt
	734	IF ( zu(k) >= rayleigh_damping_height ) THEN
	735	rdf(k) = rayleigh_damping_factor * &
	736	( SIN( pi * 0.5 * ( zu(k) - rayleigh_damping_height ) &
	737	/ ( zu(nzt) - rayleigh_damping_height ) )&
	738	)**2
	739	ENDIF
	740	ENDDO
	741	ENDIF
	742
	743	!
	744	!-- Initialize diffusivities used within the outflow damping layer in case of
	745	!-- non-cyclic lateral boundaries. A linear increase is assumed over the first
	746	!-- half of the width of the damping layer
	747	IF ( bc_lr /= 'cyclic' ) THEN
	748
	749	DO i = nxl-1, nxr+1
	750
	751	IF ( outflow_r ) THEN
	752
	753	IF ( i >= nx - outflow_damping_width ) THEN
	754	km_damp_x(i) = km_damp_max * MIN( 1.0, &
	755	( i - ( nx - outflow_damping_width ) ) / &
	756	REAL( outflow_damping_width/2 ) &
	757	)
	758	ELSE
	759	km_damp_x(i) = 0.0
	760	ENDIF
	761
	762	ELSEIF ( outflow_l ) THEN
	763
	764	IF ( i <= outflow_damping_width ) THEN
	765	km_damp_x(i) = km_damp_max * MIN( 1.0, &
	766	( outflow_damping_width - i ) / &
	767	REAL( outflow_damping_width/2 ) &
	768	)
	769	ELSE
	770	km_damp_x(i) = 0.0
	771	ENDIF
	772
	773	ENDIF
	774
	775	ENDDO
	776	ENDIF
	777
	778	IF ( bc_ns /= 'cyclic' ) THEN
	779
	780	DO j = nys-1, nyn+1
	781
	782	IF ( outflow_n ) THEN
	783
	784	IF ( j >= ny - outflow_damping_width ) THEN
	785	km_damp_y(j) = km_damp_max * MIN( 1.0, &
	786	( j - ( ny - outflow_damping_width ) ) / &
	787	REAL( outflow_damping_width/2 ) &
	788	)
	789	ELSE
	790	km_damp_y(j) = 0.0
	791	ENDIF
	792
	793	ELSEIF ( outflow_s ) THEN
	794
	795	IF ( j <= outflow_damping_width ) THEN
	796	km_damp_y(j) = km_damp_max * MIN( 1.0, &
	797	( outflow_damping_width - j ) / &
	798	REAL( outflow_damping_width/2 ) &
	799	)
	800	ELSE
	801	km_damp_y(j) = 0.0
	802	ENDIF
	803
	804	ENDIF
	805
	806	ENDDO
	807	ENDIF
	808
	809	!
	810	!-- Initialize local summation arrays for UP flow_statistics. This is necessary
	811	!-- because they may not yet have been initialized when they are called from
	812	!-- flow_statistics (or - depending on the chosen model run - are never
	813	!-- initialized)
	814	sums_divnew_l = 0.0
	815	sums_divold_l = 0.0
	816	sums_l_l = 0.0
	817	sums_up_fraction_l = 0.0
	818	sums_wsts_bc_l = 0.0
	819
	820	!
	821	!-- Pre-set masks for regional statistics. Default is the total model domain.
	822	rmask = 1.0
	823
	824	!
	825	!-- User-defined initializing actions
	826	CALL user_init
	827
	828	!
	829	!-- Input binary data file is not needed anymore. This line must be placed
	830	!-- after call of user_init!
	831	CALL close_file( 13 )
	832
	833	!
	834	!-- Compute total sum of active mask grid points
	835	!-- ngp_2dh: number of grid points of a horizontal cross section through the
	836	!-- total domain
	837	!-- ngp_3d: number of grid points of the total domain
	838	!-- Note: The lower vertical index nzb_s_outer imposes a small error on the 2D
	839	!-- ---- averages of staggered variables such as u and v due to the topography
	840	!-- arrangement on the staggered grid. Maybe revise later.
	841	ngp_2dh_outer_l = 0
	842	ngp_2dh_outer = 0
	843	ngp_2dh_l = 0
	844	ngp_2dh = 0
	845	ngp_3d_inner_l = 0
	846	ngp_3d_inner = 0
	847	ngp_3d = 0
	848	ngp_sums = ( nz + 2 ) * var_sum
	849
	850	DO sr = 0, statistic_regions
	851	DO i = nxl, nxr
	852	DO j = nys, nyn
	853	IF ( rmask(j,i,sr) == 1.0 ) THEN
	854	!
	855	!-- All xy-grid points
	856	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
	857	!
	858	!-- xy-grid points above topography
	859	DO k = nzb_s_outer(j,i), nz + 1
	860	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + 1
	861	ENDDO
	862	!
	863	!-- All grid points of the total domain above topography
	864	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) + &
	865	( nz - nzb_s_inner(j,i) + 2 )
	866	ENDIF
	867	ENDDO
	868	ENDDO
	869	ENDDO
	870
	871	sr = statistic_regions + 1
	872	#if defined( __parallel )
	873	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, &
	874	comm2d, ierr )
	875	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, &
	876	MPI_INTEGER, MPI_SUM, comm2d, ierr )
	877	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner(0), sr, MPI_INTEGER, &
	878	MPI_SUM, comm2d, ierr )
	879	#else
	880	ngp_2dh = ngp_2dh_l
	881	ngp_2dh_outer = ngp_2dh_outer_l
	882	ngp_3d_inner = ngp_3d_inner_l
	883	#endif
	884
	885	ngp_3d = ngp_2dh * ( nz + 2 )
	886
	887	!
	888	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics,
	889	!-- buoyancy, etc. A zero value will occur for cases where all grid points of
	890	!-- the respective subdomain lie below the surface topography
	891	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
	892	ngp_3d_inner = MAX( 1, ngp_3d_inner(:) )
	893
	894	DEALLOCATE( ngp_2dh_l, ngp_2dh_outer_l, ngp_3d_inner_l )
	895
	896
	897	END SUBROUTINE init_3d_model

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