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source: palm/trunk/SOURCE/time_integration.f90 @ 1327

Last change on this file since 1327 was 1321, checked in by raasch, 11 years ago
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[1]	1	SUBROUTINE time_integration
	2
[1036]	3	!--------------------------------------------------------------------------------!
	4	! This file is part of PALM.
	5	!
	6	! PALM is free software: you can redistribute it and/or modify it under the terms
	7	! of the GNU General Public License as published by the Free Software Foundation,
	8	! either version 3 of the License, or (at your option) any later version.
	9	!
	10	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
	11	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	12	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
	13	!
	14	! You should have received a copy of the GNU General Public License along with
	15	! PALM. If not, see <http://www.gnu.org/licenses/>.
	16	!
[1310]	17	! Copyright 1997-2014 Leibniz Universitaet Hannover
[1036]	18	!--------------------------------------------------------------------------------!
	19	!
[484]	20	! Current revisions:
[1092]	21	! ------------------
[1321]	22	!
	23	!
	24	! Former revisions:
	25	! -----------------
	26	! $Id: time_integration.f90 1321 2014-03-20 09:40:40Z raasch $
	27	!
	28	! 1320 2014-03-20 08:40:49Z raasch
[1320]	29	! ONLY-attribute added to USE-statements,
	30	! kind-parameters added to all INTEGER and REAL declaration statements,
	31	! kinds are defined in new module kinds,
	32	! old module precision_kind is removed,
	33	! revision history before 2012 removed,
	34	! comment fields (!:) to be used for variable explanations added to
	35	! all variable declaration statements
[1319]	36	! 1318 2014-03-17 13:35:16Z raasch
	37	! module interfaces removed
	38	!
[1309]	39	! 1308 2014-03-13 14:58:42Z fricke
	40	! +netcdf_data_format_save
	41	! For masked data, parallel netcdf output is not tested so far, hence
	42	! netcdf_data_format is switched back to non-paralell output.
	43	!
[1277]	44	! 1276 2014-01-15 13:40:41Z heinze
	45	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
	46	!
[1258]	47	! 1257 2013-11-08 15:18:40Z raasch
	48	! acc-update-host directive for timestep removed
	49	!
[1242]	50	! 1241 2013-10-30 11:36:58Z heinze
	51	! Generalize calc_mean_profile for wider use
	52	! Determine shf and qsws in dependence on data from LSF_DATA
	53	! Determine ug and vg in dependence on data from LSF_DATA
[1222]	54	! 1221 2013-09-10 08:59:13Z raasch
	55	! host update of arrays before timestep is called
	56	!
[1182]	57	! 1179 2013-06-14 05:57:58Z raasch
	58	! mean profiles for reference state are only calculated if required,
	59	! small bugfix for background communication
	60	!
[1172]	61	! 1171 2013-05-30 11:27:45Z raasch
	62	! split of prognostic_equations deactivated (comment lines), for the time being
	63	!
[1132]	64	! 1128 2013-04-12 06:19:32Z raasch
[1128]	65	! asynchronous transfer of ghost point data realized for acc-optimized version:
	66	! prognostic_equations are first called two times for those points required for
	67	! the left-right and north-south exchange, respectively, and then for the
	68	! remaining points,
	69	! those parts requiring global communication moved from prognostic_equations to
	70	! here
[392]	71	!
[1116]	72	! 1115 2013-03-26 18:16:16Z hoffmann
	73	! calculation of qr and nr is restricted to precipitation
	74	!
[1114]	75	! 1113 2013-03-10 02:48:14Z raasch
	76	! GPU-porting of boundary conditions,
	77	! openACC directives updated
	78	! formal parameter removed from routine boundary_conds
	79	!
[1112]	80	! 1111 2013-03-08 23:54:10Z raasch
	81	! +internal timestep counter for cpu statistics added,
	82	! openACC directives updated
	83	!
[1093]	84	! 1092 2013-02-02 11:24:22Z raasch
	85	! unused variables removed
	86	!
[1066]	87	! 1065 2012-11-22 17:42:36Z hoffmann
	88	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
	89	!
[1054]	90	! 1053 2012-11-13 17:11:03Z hoffmann
	91	! exchange of ghost points for nr, qr added
	92	!
[1037]	93	! 1036 2012-10-22 13:43:42Z raasch
	94	! code put under GPL (PALM 3.9)
	95	!
[1020]	96	! 1019 2012-09-28 06:46:45Z raasch
	97	! non-optimized version of prognostic_equations removed
	98	!
[1017]	99	! 1015 2012-09-27 09:23:24Z raasch
	100	! +call of prognostic_equations_acc
	101	!
[1002]	102	! 1001 2012-09-13 14:08:46Z raasch
	103	! all actions concerning leapfrog- and upstream-spline-scheme removed
	104	!
[850]	105	! 849 2012-03-15 10:35:09Z raasch
	106	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
	107	!
[826]	108	! 825 2012-02-19 03:03:44Z raasch
	109	! wang_collision_kernel renamed wang_kernel
	110	!
[1]	111	! Revision 1.1 1997/08/11 06:19:04 raasch
	112	! Initial revision
	113	!
	114	!
	115	! Description:
	116	! ------------
	117	! Integration in time of the model equations, statistical analysis and graphic
	118	! output
	119	!------------------------------------------------------------------------------!
	120
[1320]	121	USE advec_ws, &
	122	ONLY: ws_statistics
	123
	124	USE arrays_3d, &
	125	ONLY: diss, e_p, nr_p, prho, pt, pt_p, ql, ql_c, ql_v, ql_vp, qr_p, &
	126	q_p, rho, sa_p, tend, u, u_p, v, vpt, v_p, w_p
	127
	128	USE buoyancy_mod, &
	129	ONLY: calc_mean_profile
	130
	131	USE control_parameters, &
	132	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
	133	average_count_sp, averaging_interval, averaging_interval_pr, &
	134	averaging_interval_sp, bc_lr_cyc, bc_ns_cyc, &
	135	call_psolver_at_all_substeps, cloud_droplets, cloud_physics, &
	136	constant_heatflux, create_disturbances, dopr_n, &
	137	constant_diffusion, coupling_mode, coupling_start_time, &
	138	current_timestep_number, disturbance_created, &
	139	disturbance_energy_limit, dist_range, do_sum, dt_3d, &
	140	dt_averaging_input, dt_averaging_input_pr, dt_coupling, &
	141	dt_data_output_av, dt_disturb, dt_do2d_xy, dt_do2d_xz, &
	142	dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
	143	dt_dopr_listing, dt_dosp, dt_dots, dt_dvrp, dt_run_control, &
	144	end_time, first_call_lpm, galilei_transformation, humidity, &
	145	icloud_scheme, intermediate_timestep_count, &
	146	intermediate_timestep_count_max, large_scale_forcing, &
	147	loop_optimization, lsf_surf, lsf_vert, masks, mid, &
	148	netcdf_data_format, neutral, nr_timesteps_this_run, ocean, &
	149	on_device, passive_scalar, prandtl_layer, precipitation, &
	150	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
	151	run_coupled, simulated_time, simulated_time_chr, &
	152	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
	153	skip_time_do3d, skip_time_domask, skip_time_dopr, &
	154	skip_time_dosp, skip_time_data_output_av, sloping_surface, &
	155	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
	156	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
	157	time_do3d, time_domask, time_dopr, time_dopr_av, &
	158	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
	159	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
	160	time_run_control, time_since_reference_point, turbulence, &
	161	turbulent_inflow, use_initial_profile_as_reference, &
	162	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
	163	ws_scheme_sca
	164
	165	USE cpulog, &
	166	ONLY: cpu_log, log_point, log_point_s
	167
	168	USE indices, &
	169	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
	170	nxrg, nyn, nys, nzb, nzb_u_inner, nzb_v_inner
	171
	172	USE interaction_droplets_ptq_mod, &
	173	ONLY: interaction_droplets_ptq
	174
	175	USE kinds
	176
	177	USE ls_forcing_mod, &
	178	ONLY: ls_forcing_surf, ls_forcing_vert
	179
	180	USE particle_attributes, &
	181	ONLY: particle_advection, particle_advection_start, wang_kernel
	182
[1]	183	USE pegrid
	184
[1320]	185	USE production_e_mod, &
	186	ONLY: production_e_init
	187
	188	USE prognostic_equations_mod, &
	189	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
	190	prognostic_equations_vector
	191
	192	USE statistics, &
	193	ONLY: flow_statistics_called, hom, pr_palm
	194
	195	USE user_actions_mod, &
	196	ONLY: user_actions
	197
[1]	198	IMPLICIT NONE
	199
[1320]	200	CHARACTER (LEN=9) :: time_to_string !:
[1]	201
[1320]	202	INTEGER(iwp) :: netcdf_data_format_save !:
	203
[1]	204	!
	205	!-- At the beginning of a simulation determine the time step as well as
	206	!-- determine and print out the run control parameters
	207	IF ( simulated_time == 0.0 ) CALL timestep
[667]	208
[1]	209	CALL run_control
	210
[667]	211
[108]	212	!
	213	!-- Data exchange between coupled models in case that a call has been omitted
	214	!-- at the end of the previous run of a job chain.
[291]	215	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[108]	216	!
	217	!-- In case of model termination initiated by the local model the coupler
	218	!-- must not be called because this would again cause an MPI hang.
	219	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
	220	CALL surface_coupler
	221	time_coupling = time_coupling - dt_coupling
	222	ENDDO
[348]	223	IF (time_coupling == 0.0 .AND. time_since_reference_point < dt_coupling)&
	224	THEN
	225	time_coupling = time_since_reference_point
	226	ENDIF
[108]	227	ENDIF
	228
	229
[1]	230	#if defined( __dvrp_graphics )
	231	!
	232	!-- Time measurement with dvrp software
	233	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	234	#endif
	235
	236	!
	237	!-- Start of the time loop
	238	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
	239	.NOT. terminate_run )
	240
	241	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
[1221]	242
[1]	243	!
	244	!-- Determine size of next time step
[1221]	245	IF ( simulated_time /= 0.0 ) THEN
	246	CALL timestep
	247	ENDIF
	248
[1]	249	!
[1241]	250	!-- Determine ug, vg and w_subs in dependence on data from external file
	251	!-- LSF_DATA
	252	IF ( large_scale_forcing .AND. lsf_vert ) THEN
	253	CALL ls_forcing_vert ( simulated_time )
	254	ENDIF
	255
	256	!
[1]	257	!-- Execute the user-defined actions
	258	CALL user_actions( 'before_timestep' )
	259
	260	!
	261	!-- Start of intermediate step loop
	262	intermediate_timestep_count = 0
	263	DO WHILE ( intermediate_timestep_count < &
	264	intermediate_timestep_count_max )
	265
	266	intermediate_timestep_count = intermediate_timestep_count + 1
	267
	268	!
	269	!-- Set the steering factors for the prognostic equations which depend
	270	!-- on the timestep scheme
	271	CALL timestep_scheme_steering
	272
	273	!
[1128]	274	!-- Calculate those variables needed in the tendency terms which need
	275	!-- global communication
[1179]	276	IF ( .NOT. use_single_reference_value .AND. &
	277	.NOT. use_initial_profile_as_reference ) THEN
	278	!
	279	!-- Horizontally averaged profiles to be used as reference state in
	280	!-- buoyancy terms (WARNING: only the respective last call of
	281	!-- calc_mean_profile defines the reference state!)
[1241]	282	IF ( .NOT. neutral ) CALL calc_mean_profile( pt, 4, 'time_int' )
	283	IF ( ocean ) CALL calc_mean_profile( rho, 64, 'time_int' )
	284	IF ( humidity ) CALL calc_mean_profile( vpt, 44, 'time_int' )
[1179]	285	ENDIF
	286
[1128]	287	IF ( .NOT. constant_diffusion ) CALL production_e_init
	288	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
	289	intermediate_timestep_count == 1 ) CALL ws_statistics
	290
	291	!
[1]	292	!-- Solve the prognostic equations. A fast cache optimized version with
	293	!-- only one single loop is used in case of Piascek-Williams advection
	294	!-- scheme. NEC vector machines use a different version, because
	295	!-- in the other versions a good vectorization is prohibited due to
	296	!-- inlining problems.
[1019]	297	IF ( loop_optimization == 'cache' ) THEN
	298	CALL prognostic_equations_cache
	299	ELSEIF ( loop_optimization == 'vector' ) THEN
[63]	300	CALL prognostic_equations_vector
[1015]	301	ELSEIF ( loop_optimization == 'acc' ) THEN
[1171]	302	i_left = nxl; i_right = nxr
	303	j_south = nys; j_north = nyn
	304	CALL prognostic_equations_acc
	305
	306	! i_left = nxl; i_right = nxl+nbgp-1
[1128]	307	! j_south = nys; j_north = nyn
	308	! CALL prognostic_equations_acc
[1171]	309	! i_left = nxr-nbgp+1; i_right = nxr
	310	! j_south = nys; j_north = nyn
	311	! CALL prognostic_equations_acc
[1128]	312
	313	!
	314	!-- Exchange of ghost points (lateral boundary conditions)
	315	IF ( background_communication ) THEN
	316
	317	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
	318
	319	send_receive = 'lr'
	320	sendrecv_in_background = .TRUE.
	321	req = 0
	322	req_count = 0
	323
	324	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	325	on_device = .TRUE. ! to be removed after complete porting
	326	ELSE ! of ghost point exchange
	327	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	328	ENDIF
	329
	330	CALL exchange_horiz( u_p, nbgp )
	331	CALL exchange_horiz( v_p, nbgp )
	332	CALL exchange_horiz( w_p, nbgp )
	333	CALL exchange_horiz( pt_p, nbgp )
	334	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	335	IF ( ocean ) THEN
	336	CALL exchange_horiz( sa_p, nbgp )
	337	CALL exchange_horiz( rho, nbgp )
	338	CALL exchange_horiz( prho, nbgp )
	339	ENDIF
	340	IF (humidity .OR. passive_scalar) THEN
	341	CALL exchange_horiz( q_p, nbgp )
	342	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	343	CALL exchange_horiz( qr_p, nbgp )
	344	CALL exchange_horiz( nr_p, nbgp )
	345	ENDIF
	346	ENDIF
	347	IF ( cloud_droplets ) THEN
	348	CALL exchange_horiz( ql, nbgp )
	349	CALL exchange_horiz( ql_c, nbgp )
	350	CALL exchange_horiz( ql_v, nbgp )
	351	CALL exchange_horiz( ql_vp, nbgp )
	352	ENDIF
	353	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	354
	355	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	356	on_device = .FALSE. ! to be removed after complete porting
	357	ELSE ! of ghost point exchange
	358	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	359	ENDIF
	360
	361	sendrecv_in_background = .FALSE.
	362
	363	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
	364
	365	ENDIF
	366
[1171]	367	! i_left = nxl+nbgp; i_right = nxr-nbgp
	368	! j_south = nys; j_north = nys+nbgp-1
	369	! CALL prognostic_equations_acc
	370	! i_left = nxl+nbgp; i_right = nxr-nbgp
	371	! j_south = nyn-nbgp+1; j_north = nyn
	372	! CALL prognostic_equations_acc
[1128]	373
	374	IF ( background_communication ) THEN
	375	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
	376	#if defined( __parallel )
	377	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	378	#endif
	379	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
	380
	381	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
	382
	383	send_receive = 'ns'
	384	sendrecv_in_background = .TRUE.
	385	req = 0
	386	req_count = 0
	387
	388	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	389	on_device = .TRUE. ! to be removed after complete porting
	390	ELSE ! of ghost point exchange
	391	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	392	ENDIF
	393
	394	CALL exchange_horiz( u_p, nbgp )
	395	CALL exchange_horiz( v_p, nbgp )
	396	CALL exchange_horiz( w_p, nbgp )
	397	CALL exchange_horiz( pt_p, nbgp )
	398	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	399	IF ( ocean ) THEN
	400	CALL exchange_horiz( sa_p, nbgp )
	401	CALL exchange_horiz( rho, nbgp )
	402	CALL exchange_horiz( prho, nbgp )
	403	ENDIF
	404	IF (humidity .OR. passive_scalar) THEN
	405	CALL exchange_horiz( q_p, nbgp )
	406	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	407	CALL exchange_horiz( qr_p, nbgp )
	408	CALL exchange_horiz( nr_p, nbgp )
	409	ENDIF
	410	ENDIF
	411	IF ( cloud_droplets ) THEN
	412	CALL exchange_horiz( ql, nbgp )
	413	CALL exchange_horiz( ql_c, nbgp )
	414	CALL exchange_horiz( ql_v, nbgp )
	415	CALL exchange_horiz( ql_vp, nbgp )
	416	ENDIF
	417	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	418
	419	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	420	on_device = .FALSE. ! to be removed after complete porting
	421	ELSE ! of ghost point exchange
	422	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	423	ENDIF
	424
	425	sendrecv_in_background = .FALSE.
	426
	427	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	428
	429	ENDIF
	430
[1171]	431	! i_left = nxl+nbgp; i_right = nxr-nbgp
	432	! j_south = nys+nbgp; j_north = nyn-nbgp
	433	! CALL prognostic_equations_acc
[1128]	434
	435	IF ( background_communication ) THEN
	436	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
	437	#if defined( __parallel )
	438	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	439	#endif
	440	send_receive = 'al'
	441	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
	442	ENDIF
	443
[1]	444	ENDIF
	445
	446	!
[849]	447	!-- Particle transport/physics with the Lagrangian particle model
	448	!-- (only once during intermediate steps, because it uses an Euler-step)
[1128]	449	!-- ### particle model should be moved before prognostic_equations, in order
	450	!-- to regard droplet interactions directly
[63]	451	IF ( particle_advection .AND. &
	452	simulated_time >= particle_advection_start .AND. &
[1]	453	intermediate_timestep_count == 1 ) THEN
[849]	454	CALL lpm
	455	first_call_lpm = .FALSE.
[1]	456	ENDIF
	457
	458	!
	459	!-- Interaction of droplets with temperature and specific humidity.
	460	!-- Droplet condensation and evaporation is calculated within
	461	!-- advec_particles.
	462	IF ( cloud_droplets .AND. &
	463	intermediate_timestep_count == intermediate_timestep_count_max )&
	464	THEN
	465	CALL interaction_droplets_ptq
	466	ENDIF
	467
	468	!
	469	!-- Exchange of ghost points (lateral boundary conditions)
[1128]	470	IF ( .NOT. background_communication ) THEN
[1113]	471
[1128]	472	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
[1113]	473
[1128]	474	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	475	on_device = .TRUE. ! to be removed after complete porting
	476	ELSE ! of ghost point exchange
	477	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
[1053]	478	ENDIF
[1]	479
[1128]	480	CALL exchange_horiz( u_p, nbgp )
	481	CALL exchange_horiz( v_p, nbgp )
	482	CALL exchange_horiz( w_p, nbgp )
	483	CALL exchange_horiz( pt_p, nbgp )
	484	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	485	IF ( ocean ) THEN
	486	CALL exchange_horiz( sa_p, nbgp )
	487	CALL exchange_horiz( rho, nbgp )
	488	CALL exchange_horiz( prho, nbgp )
	489	ENDIF
	490	IF (humidity .OR. passive_scalar) THEN
	491	CALL exchange_horiz( q_p, nbgp )
[1179]	492	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
	493	precipitation ) THEN
[1128]	494	CALL exchange_horiz( qr_p, nbgp )
	495	CALL exchange_horiz( nr_p, nbgp )
	496	ENDIF
	497	ENDIF
	498	IF ( cloud_droplets ) THEN
	499	CALL exchange_horiz( ql, nbgp )
	500	CALL exchange_horiz( ql_c, nbgp )
	501	CALL exchange_horiz( ql_v, nbgp )
	502	CALL exchange_horiz( ql_vp, nbgp )
	503	ENDIF
	504	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	505
	506	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	507	on_device = .FALSE. ! to be removed after complete porting
	508	ELSE ! of ghost point exchange
	509	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	510	ENDIF
	511
	512	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	513
[1113]	514	ENDIF
	515
[1]	516	!
	517	!-- Boundary conditions for the prognostic quantities (except of the
	518	!-- velocities at the outflow in case of a non-cyclic lateral wall)
[1113]	519	CALL boundary_conds
[1]	520
	521	!
[73]	522	!-- Swap the time levels in preparation for the next time step.
	523	CALL swap_timelevel
	524
	525	!
[1]	526	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
	527	!-- when a sloping surface is used
	528	IF ( sloping_surface ) THEN
[707]	529	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
	530	pt_slope_offset
	531	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
	532	pt_slope_offset
[1]	533	ENDIF
	534
	535	!
[151]	536	!-- Impose a turbulent inflow using the recycling method
	537	IF ( turbulent_inflow ) CALL inflow_turbulence
	538
	539	!
[1]	540	!-- Impose a random perturbation on the horizontal velocity field
[106]	541	IF ( create_disturbances .AND. &
	542	( call_psolver_at_all_substeps .AND. &
[1]	543	intermediate_timestep_count == intermediate_timestep_count_max )&
[106]	544	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
	545	intermediate_timestep_count == 1 ) ) &
[1]	546	THEN
	547	time_disturb = time_disturb + dt_3d
	548	IF ( time_disturb >= dt_disturb ) THEN
[1111]	549	!$acc update host( u, v )
[1113]	550	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
[87]	551	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
[75]	552	CALL disturb_field( nzb_u_inner, tend, u )
	553	CALL disturb_field( nzb_v_inner, tend, v )
[707]	554	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
[1]	555	!
	556	!-- Runs with a non-cyclic lateral wall need perturbations
	557	!-- near the inflow throughout the whole simulation
	558	dist_range = 1
[75]	559	CALL disturb_field( nzb_u_inner, tend, u )
	560	CALL disturb_field( nzb_v_inner, tend, v )
[1]	561	dist_range = 0
	562	ENDIF
[1113]	563	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
[1111]	564	!$acc update device( u, v )
[1]	565	time_disturb = time_disturb - dt_disturb
	566	ENDIF
	567	ENDIF
	568
	569	!
	570	!-- Reduce the velocity divergence via the equation for perturbation
	571	!-- pressure.
[106]	572	IF ( intermediate_timestep_count == 1 .OR. &
	573	call_psolver_at_all_substeps ) THEN
[1]	574	CALL pres
	575	ENDIF
	576
	577	!
	578	!-- If required, compute liquid water content
[1015]	579	IF ( cloud_physics ) THEN
	580	CALL calc_liquid_water_content
	581	!$acc update device( ql )
	582	ENDIF
[1115]	583	!
	584	!-- If required, compute virtual potential temperature
	585	IF ( humidity ) THEN
	586	CALL compute_vpt
	587	!$acc update device( vpt )
	588	ENDIF
[1]	589	!
	590	!-- Compute the diffusion quantities
	591	IF ( .NOT. constant_diffusion ) THEN
	592
	593	!
[1276]	594	!-- Determine surface fluxes shf and qsws and surface values
	595	!-- pt_surface and q_surface in dependence on data from external
	596	!-- file LSF_DATA respectively
	597	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
	598	intermediate_timestep_count == intermediate_timestep_count_max )&
	599	THEN
	600	CALL ls_forcing_surf ( simulated_time )
	601	ENDIF
	602
	603	!
[1]	604	!-- First the vertical fluxes in the Prandtl layer are being computed
	605	IF ( prandtl_layer ) THEN
	606	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'start' )
	607	CALL prandtl_fluxes
	608	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'stop' )
	609	ENDIF
[1241]	610
[1]	611	!
	612	!-- Compute the diffusion coefficients
	613	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
[75]	614	IF ( .NOT. humidity ) THEN
[97]	615	IF ( ocean ) THEN
[388]	616	CALL diffusivities( prho, prho_reference )
[97]	617	ELSE
	618	CALL diffusivities( pt, pt_reference )
	619	ENDIF
[1]	620	ELSE
[97]	621	CALL diffusivities( vpt, pt_reference )
[1]	622	ENDIF
	623	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
	624
	625	ENDIF
	626
	627	ENDDO ! Intermediate step loop
	628
	629	!
	630	!-- Increase simulation time and output times
[1111]	631	nr_timesteps_this_run = nr_timesteps_this_run + 1
[291]	632	current_timestep_number = current_timestep_number + 1
	633	simulated_time = simulated_time + dt_3d
	634	simulated_time_chr = time_to_string( simulated_time )
	635	time_since_reference_point = simulated_time - coupling_start_time
	636
[1]	637	IF ( simulated_time >= skip_time_data_output_av ) THEN
	638	time_do_av = time_do_av + dt_3d
	639	ENDIF
	640	IF ( simulated_time >= skip_time_do2d_xy ) THEN
	641	time_do2d_xy = time_do2d_xy + dt_3d
	642	ENDIF
	643	IF ( simulated_time >= skip_time_do2d_xz ) THEN
	644	time_do2d_xz = time_do2d_xz + dt_3d
	645	ENDIF
	646	IF ( simulated_time >= skip_time_do2d_yz ) THEN
	647	time_do2d_yz = time_do2d_yz + dt_3d
	648	ENDIF
	649	IF ( simulated_time >= skip_time_do3d ) THEN
	650	time_do3d = time_do3d + dt_3d
	651	ENDIF
[410]	652	DO mid = 1, masks
	653	IF ( simulated_time >= skip_time_domask(mid) ) THEN
	654	time_domask(mid)= time_domask(mid) + dt_3d
	655	ENDIF
	656	ENDDO
[1]	657	time_dvrp = time_dvrp + dt_3d
	658	IF ( simulated_time >= skip_time_dosp ) THEN
	659	time_dosp = time_dosp + dt_3d
	660	ENDIF
	661	time_dots = time_dots + dt_3d
[849]	662	IF ( .NOT. first_call_lpm ) THEN
[1]	663	time_dopts = time_dopts + dt_3d
	664	ENDIF
	665	IF ( simulated_time >= skip_time_dopr ) THEN
	666	time_dopr = time_dopr + dt_3d
	667	ENDIF
	668	time_dopr_listing = time_dopr_listing + dt_3d
	669	time_run_control = time_run_control + dt_3d
	670
	671	!
[102]	672	!-- Data exchange between coupled models
[291]	673	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[102]	674	time_coupling = time_coupling + dt_3d
[343]	675
[108]	676	!
	677	!-- In case of model termination initiated by the local model
	678	!-- (terminate_coupled > 0), the coupler must be skipped because it would
	679	!-- cause an MPI intercomminucation hang.
	680	!-- If necessary, the coupler will be called at the beginning of the
	681	!-- next restart run.
	682	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
[102]	683	CALL surface_coupler
	684	time_coupling = time_coupling - dt_coupling
	685	ENDDO
	686	ENDIF
	687
	688	!
[46]	689	!-- Execute user-defined actions
	690	CALL user_actions( 'after_integration' )
	691
	692	!
[1]	693	!-- If Galilei transformation is used, determine the distance that the
	694	!-- model has moved so far
	695	IF ( galilei_transformation ) THEN
	696	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
	697	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
	698	ENDIF
	699
	700	!
	701	!-- Check, if restart is necessary (because cpu-time is expiring or
	702	!-- because it is forced by user) and set stop flag
[108]	703	!-- This call is skipped if the remote model has already initiated a restart.
	704	IF ( .NOT. terminate_run ) CALL check_for_restart
[1]	705
	706	!
	707	!-- Carry out statistical analysis and output at the requested output times.
	708	!-- The MOD function is used for calculating the output time counters (like
	709	!-- time_dopr) in order to regard a possible decrease of the output time
	710	!-- interval in case of restart runs
	711
	712	!
	713	!-- Set a flag indicating that so far no statistics have been created
	714	!-- for this time step
	715	flow_statistics_called = .FALSE.
	716
	717	!
	718	!-- If required, call flow_statistics for averaging in time
	719	IF ( averaging_interval_pr /= 0.0 .AND. &
	720	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
	721	simulated_time >= skip_time_dopr ) THEN
	722	time_dopr_av = time_dopr_av + dt_3d
	723	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
	724	do_sum = .TRUE.
	725	time_dopr_av = MOD( time_dopr_av, &
	726	MAX( dt_averaging_input_pr, dt_3d ) )
	727	ENDIF
	728	ENDIF
	729	IF ( do_sum ) CALL flow_statistics
	730
	731	!
[410]	732	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
[1]	733	IF ( averaging_interval /= 0.0 .AND. &
	734	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
	735	simulated_time >= skip_time_data_output_av ) &
	736	THEN
	737	time_do_sla = time_do_sla + dt_3d
	738	IF ( time_do_sla >= dt_averaging_input ) THEN
	739	CALL sum_up_3d_data
	740	average_count_3d = average_count_3d + 1
	741	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
	742	ENDIF
	743	ENDIF
	744
	745	!
	746	!-- Calculate spectra for time averaging
	747	IF ( averaging_interval_sp /= 0.0 .AND. &
	748	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
	749	simulated_time >= skip_time_dosp ) THEN
	750	time_dosp_av = time_dosp_av + dt_3d
	751	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
	752	CALL calc_spectra
	753	time_dosp_av = MOD( time_dosp_av, &
	754	MAX( dt_averaging_input_pr, dt_3d ) )
	755	ENDIF
	756	ENDIF
	757
	758	!
	759	!-- Computation and output of run control parameters.
[1001]	760	!-- This is also done whenever perturbations have been imposed
[1]	761	IF ( time_run_control >= dt_run_control .OR. &
[1001]	762	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
[1]	763	THEN
	764	CALL run_control
	765	IF ( time_run_control >= dt_run_control ) THEN
	766	time_run_control = MOD( time_run_control, &
	767	MAX( dt_run_control, dt_3d ) )
	768	ENDIF
	769	ENDIF
	770
	771	!
	772	!-- Profile output (ASCII) on file
	773	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
	774	CALL print_1d
	775	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
	776	dt_3d ) )
	777	ENDIF
	778
	779	!
	780	!-- Graphic output for PROFIL
	781	IF ( time_dopr >= dt_dopr ) THEN
	782	IF ( dopr_n /= 0 ) CALL data_output_profiles
	783	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
	784	time_dopr_av = 0.0 ! due to averaging (see above)
	785	ENDIF
	786
	787	!
	788	!-- Graphic output for time series
	789	IF ( time_dots >= dt_dots ) THEN
[48]	790	CALL data_output_tseries
[1]	791	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
	792	ENDIF
	793
	794	!
	795	!-- Output of spectra (formatted for use with PROFIL), in case of no
	796	!-- time averaging, spectra has to be calculated before
	797	IF ( time_dosp >= dt_dosp ) THEN
	798	IF ( average_count_sp == 0 ) CALL calc_spectra
	799	CALL data_output_spectra
	800	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
	801	ENDIF
	802
	803	!
	804	!-- 2d-data output (cross-sections)
	805	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
	806	CALL data_output_2d( 'xy', 0 )
	807	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
	808	ENDIF
	809	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
	810	CALL data_output_2d( 'xz', 0 )
	811	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
	812	ENDIF
	813	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
	814	CALL data_output_2d( 'yz', 0 )
	815	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
	816	ENDIF
	817
	818	!
	819	!-- 3d-data output (volume data)
	820	IF ( time_do3d >= dt_do3d ) THEN
	821	CALL data_output_3d( 0 )
	822	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
	823	ENDIF
	824
	825	!
[410]	826	!-- masked data output
[1308]	827	!-- Parallel netcdf output is not tested so far for masked data, hence
	828	!-- netcdf_data_format is switched back to non-paralell output.
	829	netcdf_data_format_save = netcdf_data_format
	830	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	831	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	832	DO mid = 1, masks
	833	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
	834	CALL data_output_mask( 0 )
	835	time_domask(mid) = MOD( time_domask(mid), &
	836	MAX( dt_domask(mid), dt_3d ) )
	837	ENDIF
	838	ENDDO
[1308]	839	netcdf_data_format = netcdf_data_format_save
[410]	840
	841	!
	842	!-- Output of time-averaged 2d/3d/masked data
[1]	843	IF ( time_do_av >= dt_data_output_av ) THEN
	844	CALL average_3d_data
	845	CALL data_output_2d( 'xy', 1 )
	846	CALL data_output_2d( 'xz', 1 )
	847	CALL data_output_2d( 'yz', 1 )
	848	CALL data_output_3d( 1 )
[1308]	849	!-- Parallel netcdf output is not tested so far for masked data, hence
	850	!-- netcdf_data_format is switched back to non-paralell output.
	851	netcdf_data_format_save = netcdf_data_format
	852	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	853	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	854	DO mid = 1, masks
	855	CALL data_output_mask( 1 )
	856	ENDDO
[1308]	857	netcdf_data_format = netcdf_data_format_save
[1]	858	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
	859	ENDIF
	860
	861	!
	862	!-- Output of particle time series
[253]	863	IF ( particle_advection ) THEN
	864	IF ( time_dopts >= dt_dopts .OR. &
	865	( simulated_time >= particle_advection_start .AND. &
[849]	866	first_call_lpm ) ) THEN
[253]	867	CALL data_output_ptseries
	868	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
	869	ENDIF
[1]	870	ENDIF
	871
	872	!
	873	!-- Output of dvrp-graphics (isosurface, particles, slicer)
	874	#if defined( __dvrp_graphics )
	875	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
	876	#endif
	877	IF ( time_dvrp >= dt_dvrp ) THEN
	878	CALL data_output_dvrp
	879	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
	880	ENDIF
	881	#if defined( __dvrp_graphics )
	882	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	883	#endif
	884
	885	!
	886	!-- If required, set the heat flux for the next time step at a random value
	887	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
	888
	889	!
	890	!-- Execute user-defined actions
	891	CALL user_actions( 'after_timestep' )
	892
	893	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
	894
[667]	895
[1]	896	ENDDO ! time loop
	897
	898	#if defined( __dvrp_graphics )
	899	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
	900	#endif
	901
	902	END SUBROUTINE time_integration

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