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source: palm/trunk/SOURCE/time_integration.f90 @ 1350

Last change on this file since 1350 was 1343, checked in by kanani, 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	!
[1343]	23	!
[1321]	24	! Former revisions:
	25	! -----------------
	26	! $Id: time_integration.f90 1343 2014-03-26 17:07:58Z maronga $
	27	!
[1343]	28	! 1342 2014-03-26 17:04:47Z kanani
	29	! REAL constants defined as wp-kind
	30	!
[1321]	31	! 1320 2014-03-20 08:40:49Z raasch
[1320]	32	! ONLY-attribute added to USE-statements,
	33	! kind-parameters added to all INTEGER and REAL declaration statements,
	34	! kinds are defined in new module kinds,
	35	! old module precision_kind is removed,
	36	! revision history before 2012 removed,
	37	! comment fields (!:) to be used for variable explanations added to
	38	! all variable declaration statements
[1319]	39	! 1318 2014-03-17 13:35:16Z raasch
	40	! module interfaces removed
	41	!
[1309]	42	! 1308 2014-03-13 14:58:42Z fricke
	43	! +netcdf_data_format_save
	44	! For masked data, parallel netcdf output is not tested so far, hence
	45	! netcdf_data_format is switched back to non-paralell output.
	46	!
[1277]	47	! 1276 2014-01-15 13:40:41Z heinze
	48	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
	49	!
[1258]	50	! 1257 2013-11-08 15:18:40Z raasch
	51	! acc-update-host directive for timestep removed
	52	!
[1242]	53	! 1241 2013-10-30 11:36:58Z heinze
	54	! Generalize calc_mean_profile for wider use
	55	! Determine shf and qsws in dependence on data from LSF_DATA
	56	! Determine ug and vg in dependence on data from LSF_DATA
[1222]	57	! 1221 2013-09-10 08:59:13Z raasch
	58	! host update of arrays before timestep is called
	59	!
[1182]	60	! 1179 2013-06-14 05:57:58Z raasch
	61	! mean profiles for reference state are only calculated if required,
	62	! small bugfix for background communication
	63	!
[1172]	64	! 1171 2013-05-30 11:27:45Z raasch
	65	! split of prognostic_equations deactivated (comment lines), for the time being
	66	!
[1132]	67	! 1128 2013-04-12 06:19:32Z raasch
[1128]	68	! asynchronous transfer of ghost point data realized for acc-optimized version:
	69	! prognostic_equations are first called two times for those points required for
	70	! the left-right and north-south exchange, respectively, and then for the
	71	! remaining points,
	72	! those parts requiring global communication moved from prognostic_equations to
	73	! here
[392]	74	!
[1116]	75	! 1115 2013-03-26 18:16:16Z hoffmann
	76	! calculation of qr and nr is restricted to precipitation
	77	!
[1114]	78	! 1113 2013-03-10 02:48:14Z raasch
	79	! GPU-porting of boundary conditions,
	80	! openACC directives updated
	81	! formal parameter removed from routine boundary_conds
	82	!
[1112]	83	! 1111 2013-03-08 23:54:10Z raasch
	84	! +internal timestep counter for cpu statistics added,
	85	! openACC directives updated
	86	!
[1093]	87	! 1092 2013-02-02 11:24:22Z raasch
	88	! unused variables removed
	89	!
[1066]	90	! 1065 2012-11-22 17:42:36Z hoffmann
	91	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
	92	!
[1054]	93	! 1053 2012-11-13 17:11:03Z hoffmann
	94	! exchange of ghost points for nr, qr added
	95	!
[1037]	96	! 1036 2012-10-22 13:43:42Z raasch
	97	! code put under GPL (PALM 3.9)
	98	!
[1020]	99	! 1019 2012-09-28 06:46:45Z raasch
	100	! non-optimized version of prognostic_equations removed
	101	!
[1017]	102	! 1015 2012-09-27 09:23:24Z raasch
	103	! +call of prognostic_equations_acc
	104	!
[1002]	105	! 1001 2012-09-13 14:08:46Z raasch
	106	! all actions concerning leapfrog- and upstream-spline-scheme removed
	107	!
[850]	108	! 849 2012-03-15 10:35:09Z raasch
	109	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
	110	!
[826]	111	! 825 2012-02-19 03:03:44Z raasch
	112	! wang_collision_kernel renamed wang_kernel
	113	!
[1]	114	! Revision 1.1 1997/08/11 06:19:04 raasch
	115	! Initial revision
	116	!
	117	!
	118	! Description:
	119	! ------------
	120	! Integration in time of the model equations, statistical analysis and graphic
	121	! output
	122	!------------------------------------------------------------------------------!
	123
[1320]	124	USE advec_ws, &
	125	ONLY: ws_statistics
	126
	127	USE arrays_3d, &
	128	ONLY: diss, e_p, nr_p, prho, pt, pt_p, ql, ql_c, ql_v, ql_vp, qr_p, &
	129	q_p, rho, sa_p, tend, u, u_p, v, vpt, v_p, w_p
	130
	131	USE buoyancy_mod, &
	132	ONLY: calc_mean_profile
	133
	134	USE control_parameters, &
	135	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
	136	average_count_sp, averaging_interval, averaging_interval_pr, &
	137	averaging_interval_sp, bc_lr_cyc, bc_ns_cyc, &
	138	call_psolver_at_all_substeps, cloud_droplets, cloud_physics, &
	139	constant_heatflux, create_disturbances, dopr_n, &
	140	constant_diffusion, coupling_mode, coupling_start_time, &
	141	current_timestep_number, disturbance_created, &
	142	disturbance_energy_limit, dist_range, do_sum, dt_3d, &
	143	dt_averaging_input, dt_averaging_input_pr, dt_coupling, &
	144	dt_data_output_av, dt_disturb, dt_do2d_xy, dt_do2d_xz, &
	145	dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
	146	dt_dopr_listing, dt_dosp, dt_dots, dt_dvrp, dt_run_control, &
	147	end_time, first_call_lpm, galilei_transformation, humidity, &
	148	icloud_scheme, intermediate_timestep_count, &
	149	intermediate_timestep_count_max, large_scale_forcing, &
	150	loop_optimization, lsf_surf, lsf_vert, masks, mid, &
	151	netcdf_data_format, neutral, nr_timesteps_this_run, ocean, &
	152	on_device, passive_scalar, prandtl_layer, precipitation, &
	153	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
	154	run_coupled, simulated_time, simulated_time_chr, &
	155	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
	156	skip_time_do3d, skip_time_domask, skip_time_dopr, &
	157	skip_time_dosp, skip_time_data_output_av, sloping_surface, &
	158	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
	159	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
	160	time_do3d, time_domask, time_dopr, time_dopr_av, &
	161	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
	162	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
	163	time_run_control, time_since_reference_point, turbulence, &
	164	turbulent_inflow, use_initial_profile_as_reference, &
	165	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
	166	ws_scheme_sca
	167
	168	USE cpulog, &
	169	ONLY: cpu_log, log_point, log_point_s
	170
	171	USE indices, &
	172	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
	173	nxrg, nyn, nys, nzb, nzb_u_inner, nzb_v_inner
	174
	175	USE interaction_droplets_ptq_mod, &
	176	ONLY: interaction_droplets_ptq
	177
	178	USE kinds
	179
	180	USE ls_forcing_mod, &
	181	ONLY: ls_forcing_surf, ls_forcing_vert
	182
	183	USE particle_attributes, &
	184	ONLY: particle_advection, particle_advection_start, wang_kernel
	185
[1]	186	USE pegrid
	187
[1320]	188	USE production_e_mod, &
	189	ONLY: production_e_init
	190
	191	USE prognostic_equations_mod, &
	192	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
	193	prognostic_equations_vector
	194
	195	USE statistics, &
	196	ONLY: flow_statistics_called, hom, pr_palm
	197
	198	USE user_actions_mod, &
	199	ONLY: user_actions
	200
[1]	201	IMPLICIT NONE
	202
[1320]	203	CHARACTER (LEN=9) :: time_to_string !:
[1]	204
[1320]	205	INTEGER(iwp) :: netcdf_data_format_save !:
	206
[1]	207	!
	208	!-- At the beginning of a simulation determine the time step as well as
	209	!-- determine and print out the run control parameters
[1342]	210	IF ( simulated_time == 0.0_wp ) CALL timestep
[667]	211
[1]	212	CALL run_control
	213
[667]	214
[108]	215	!
	216	!-- Data exchange between coupled models in case that a call has been omitted
	217	!-- at the end of the previous run of a job chain.
[291]	218	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[108]	219	!
	220	!-- In case of model termination initiated by the local model the coupler
	221	!-- must not be called because this would again cause an MPI hang.
	222	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
	223	CALL surface_coupler
	224	time_coupling = time_coupling - dt_coupling
	225	ENDDO
[1342]	226	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
[348]	227	THEN
	228	time_coupling = time_since_reference_point
	229	ENDIF
[108]	230	ENDIF
	231
	232
[1]	233	#if defined( __dvrp_graphics )
	234	!
	235	!-- Time measurement with dvrp software
	236	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	237	#endif
	238
	239	!
	240	!-- Start of the time loop
	241	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
	242	.NOT. terminate_run )
	243
	244	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
[1221]	245
[1]	246	!
	247	!-- Determine size of next time step
[1342]	248	IF ( simulated_time /= 0.0_wp ) THEN
[1221]	249	CALL timestep
	250	ENDIF
	251
[1]	252	!
[1241]	253	!-- Determine ug, vg and w_subs in dependence on data from external file
	254	!-- LSF_DATA
	255	IF ( large_scale_forcing .AND. lsf_vert ) THEN
	256	CALL ls_forcing_vert ( simulated_time )
	257	ENDIF
	258
	259	!
[1]	260	!-- Execute the user-defined actions
	261	CALL user_actions( 'before_timestep' )
	262
	263	!
	264	!-- Start of intermediate step loop
	265	intermediate_timestep_count = 0
	266	DO WHILE ( intermediate_timestep_count < &
	267	intermediate_timestep_count_max )
	268
	269	intermediate_timestep_count = intermediate_timestep_count + 1
	270
	271	!
	272	!-- Set the steering factors for the prognostic equations which depend
	273	!-- on the timestep scheme
	274	CALL timestep_scheme_steering
	275
	276	!
[1128]	277	!-- Calculate those variables needed in the tendency terms which need
	278	!-- global communication
[1179]	279	IF ( .NOT. use_single_reference_value .AND. &
	280	.NOT. use_initial_profile_as_reference ) THEN
	281	!
	282	!-- Horizontally averaged profiles to be used as reference state in
	283	!-- buoyancy terms (WARNING: only the respective last call of
	284	!-- calc_mean_profile defines the reference state!)
[1241]	285	IF ( .NOT. neutral ) CALL calc_mean_profile( pt, 4, 'time_int' )
	286	IF ( ocean ) CALL calc_mean_profile( rho, 64, 'time_int' )
	287	IF ( humidity ) CALL calc_mean_profile( vpt, 44, 'time_int' )
[1179]	288	ENDIF
	289
[1128]	290	IF ( .NOT. constant_diffusion ) CALL production_e_init
	291	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
	292	intermediate_timestep_count == 1 ) CALL ws_statistics
	293
	294	!
[1]	295	!-- Solve the prognostic equations. A fast cache optimized version with
	296	!-- only one single loop is used in case of Piascek-Williams advection
	297	!-- scheme. NEC vector machines use a different version, because
	298	!-- in the other versions a good vectorization is prohibited due to
	299	!-- inlining problems.
[1019]	300	IF ( loop_optimization == 'cache' ) THEN
	301	CALL prognostic_equations_cache
	302	ELSEIF ( loop_optimization == 'vector' ) THEN
[63]	303	CALL prognostic_equations_vector
[1015]	304	ELSEIF ( loop_optimization == 'acc' ) THEN
[1171]	305	i_left = nxl; i_right = nxr
	306	j_south = nys; j_north = nyn
	307	CALL prognostic_equations_acc
	308
	309	! i_left = nxl; i_right = nxl+nbgp-1
[1128]	310	! j_south = nys; j_north = nyn
	311	! CALL prognostic_equations_acc
[1171]	312	! i_left = nxr-nbgp+1; i_right = nxr
	313	! j_south = nys; j_north = nyn
	314	! CALL prognostic_equations_acc
[1128]	315
	316	!
	317	!-- Exchange of ghost points (lateral boundary conditions)
	318	IF ( background_communication ) THEN
	319
	320	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
	321
	322	send_receive = 'lr'
	323	sendrecv_in_background = .TRUE.
	324	req = 0
	325	req_count = 0
	326
	327	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	328	on_device = .TRUE. ! to be removed after complete porting
	329	ELSE ! of ghost point exchange
	330	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	331	ENDIF
	332
	333	CALL exchange_horiz( u_p, nbgp )
	334	CALL exchange_horiz( v_p, nbgp )
	335	CALL exchange_horiz( w_p, nbgp )
	336	CALL exchange_horiz( pt_p, nbgp )
	337	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	338	IF ( ocean ) THEN
	339	CALL exchange_horiz( sa_p, nbgp )
	340	CALL exchange_horiz( rho, nbgp )
	341	CALL exchange_horiz( prho, nbgp )
	342	ENDIF
	343	IF (humidity .OR. passive_scalar) THEN
	344	CALL exchange_horiz( q_p, nbgp )
	345	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	346	CALL exchange_horiz( qr_p, nbgp )
	347	CALL exchange_horiz( nr_p, nbgp )
	348	ENDIF
	349	ENDIF
	350	IF ( cloud_droplets ) THEN
	351	CALL exchange_horiz( ql, nbgp )
	352	CALL exchange_horiz( ql_c, nbgp )
	353	CALL exchange_horiz( ql_v, nbgp )
	354	CALL exchange_horiz( ql_vp, nbgp )
	355	ENDIF
	356	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	357
	358	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	359	on_device = .FALSE. ! to be removed after complete porting
	360	ELSE ! of ghost point exchange
	361	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	362	ENDIF
	363
	364	sendrecv_in_background = .FALSE.
	365
	366	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
	367
	368	ENDIF
	369
[1171]	370	! i_left = nxl+nbgp; i_right = nxr-nbgp
	371	! j_south = nys; j_north = nys+nbgp-1
	372	! CALL prognostic_equations_acc
	373	! i_left = nxl+nbgp; i_right = nxr-nbgp
	374	! j_south = nyn-nbgp+1; j_north = nyn
	375	! CALL prognostic_equations_acc
[1128]	376
	377	IF ( background_communication ) THEN
	378	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
	379	#if defined( __parallel )
	380	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	381	#endif
	382	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
	383
	384	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
	385
	386	send_receive = 'ns'
	387	sendrecv_in_background = .TRUE.
	388	req = 0
	389	req_count = 0
	390
	391	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	392	on_device = .TRUE. ! to be removed after complete porting
	393	ELSE ! of ghost point exchange
	394	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	395	ENDIF
	396
	397	CALL exchange_horiz( u_p, nbgp )
	398	CALL exchange_horiz( v_p, nbgp )
	399	CALL exchange_horiz( w_p, nbgp )
	400	CALL exchange_horiz( pt_p, nbgp )
	401	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	402	IF ( ocean ) THEN
	403	CALL exchange_horiz( sa_p, nbgp )
	404	CALL exchange_horiz( rho, nbgp )
	405	CALL exchange_horiz( prho, nbgp )
	406	ENDIF
	407	IF (humidity .OR. passive_scalar) THEN
	408	CALL exchange_horiz( q_p, nbgp )
	409	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	410	CALL exchange_horiz( qr_p, nbgp )
	411	CALL exchange_horiz( nr_p, nbgp )
	412	ENDIF
	413	ENDIF
	414	IF ( cloud_droplets ) THEN
	415	CALL exchange_horiz( ql, nbgp )
	416	CALL exchange_horiz( ql_c, nbgp )
	417	CALL exchange_horiz( ql_v, nbgp )
	418	CALL exchange_horiz( ql_vp, nbgp )
	419	ENDIF
	420	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	421
	422	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	423	on_device = .FALSE. ! to be removed after complete porting
	424	ELSE ! of ghost point exchange
	425	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	426	ENDIF
	427
	428	sendrecv_in_background = .FALSE.
	429
	430	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	431
	432	ENDIF
	433
[1171]	434	! i_left = nxl+nbgp; i_right = nxr-nbgp
	435	! j_south = nys+nbgp; j_north = nyn-nbgp
	436	! CALL prognostic_equations_acc
[1128]	437
	438	IF ( background_communication ) THEN
	439	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
	440	#if defined( __parallel )
	441	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	442	#endif
	443	send_receive = 'al'
	444	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
	445	ENDIF
	446
[1]	447	ENDIF
	448
	449	!
[849]	450	!-- Particle transport/physics with the Lagrangian particle model
	451	!-- (only once during intermediate steps, because it uses an Euler-step)
[1128]	452	!-- ### particle model should be moved before prognostic_equations, in order
	453	!-- to regard droplet interactions directly
[63]	454	IF ( particle_advection .AND. &
	455	simulated_time >= particle_advection_start .AND. &
[1]	456	intermediate_timestep_count == 1 ) THEN
[849]	457	CALL lpm
	458	first_call_lpm = .FALSE.
[1]	459	ENDIF
	460
	461	!
	462	!-- Interaction of droplets with temperature and specific humidity.
	463	!-- Droplet condensation and evaporation is calculated within
	464	!-- advec_particles.
	465	IF ( cloud_droplets .AND. &
	466	intermediate_timestep_count == intermediate_timestep_count_max )&
	467	THEN
	468	CALL interaction_droplets_ptq
	469	ENDIF
	470
	471	!
	472	!-- Exchange of ghost points (lateral boundary conditions)
[1128]	473	IF ( .NOT. background_communication ) THEN
[1113]	474
[1128]	475	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
[1113]	476
[1128]	477	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	478	on_device = .TRUE. ! to be removed after complete porting
	479	ELSE ! of ghost point exchange
	480	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
[1053]	481	ENDIF
[1]	482
[1128]	483	CALL exchange_horiz( u_p, nbgp )
	484	CALL exchange_horiz( v_p, nbgp )
	485	CALL exchange_horiz( w_p, nbgp )
	486	CALL exchange_horiz( pt_p, nbgp )
	487	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	488	IF ( ocean ) THEN
	489	CALL exchange_horiz( sa_p, nbgp )
	490	CALL exchange_horiz( rho, nbgp )
	491	CALL exchange_horiz( prho, nbgp )
	492	ENDIF
	493	IF (humidity .OR. passive_scalar) THEN
	494	CALL exchange_horiz( q_p, nbgp )
[1179]	495	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
	496	precipitation ) THEN
[1128]	497	CALL exchange_horiz( qr_p, nbgp )
	498	CALL exchange_horiz( nr_p, nbgp )
	499	ENDIF
	500	ENDIF
	501	IF ( cloud_droplets ) THEN
	502	CALL exchange_horiz( ql, nbgp )
	503	CALL exchange_horiz( ql_c, nbgp )
	504	CALL exchange_horiz( ql_v, nbgp )
	505	CALL exchange_horiz( ql_vp, nbgp )
	506	ENDIF
	507	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	508
	509	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	510	on_device = .FALSE. ! to be removed after complete porting
	511	ELSE ! of ghost point exchange
	512	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	513	ENDIF
	514
	515	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	516
[1113]	517	ENDIF
	518
[1]	519	!
	520	!-- Boundary conditions for the prognostic quantities (except of the
	521	!-- velocities at the outflow in case of a non-cyclic lateral wall)
[1113]	522	CALL boundary_conds
[1]	523
	524	!
[73]	525	!-- Swap the time levels in preparation for the next time step.
	526	CALL swap_timelevel
	527
	528	!
[1]	529	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
	530	!-- when a sloping surface is used
	531	IF ( sloping_surface ) THEN
[707]	532	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
	533	pt_slope_offset
	534	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
	535	pt_slope_offset
[1]	536	ENDIF
	537
	538	!
[151]	539	!-- Impose a turbulent inflow using the recycling method
	540	IF ( turbulent_inflow ) CALL inflow_turbulence
	541
	542	!
[1]	543	!-- Impose a random perturbation on the horizontal velocity field
[106]	544	IF ( create_disturbances .AND. &
	545	( call_psolver_at_all_substeps .AND. &
[1]	546	intermediate_timestep_count == intermediate_timestep_count_max )&
[106]	547	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
	548	intermediate_timestep_count == 1 ) ) &
[1]	549	THEN
	550	time_disturb = time_disturb + dt_3d
	551	IF ( time_disturb >= dt_disturb ) THEN
[1111]	552	!$acc update host( u, v )
[1113]	553	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
[87]	554	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
[75]	555	CALL disturb_field( nzb_u_inner, tend, u )
	556	CALL disturb_field( nzb_v_inner, tend, v )
[707]	557	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
[1]	558	!
	559	!-- Runs with a non-cyclic lateral wall need perturbations
	560	!-- near the inflow throughout the whole simulation
	561	dist_range = 1
[75]	562	CALL disturb_field( nzb_u_inner, tend, u )
	563	CALL disturb_field( nzb_v_inner, tend, v )
[1]	564	dist_range = 0
	565	ENDIF
[1113]	566	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
[1111]	567	!$acc update device( u, v )
[1]	568	time_disturb = time_disturb - dt_disturb
	569	ENDIF
	570	ENDIF
	571
	572	!
	573	!-- Reduce the velocity divergence via the equation for perturbation
	574	!-- pressure.
[106]	575	IF ( intermediate_timestep_count == 1 .OR. &
	576	call_psolver_at_all_substeps ) THEN
[1]	577	CALL pres
	578	ENDIF
	579
	580	!
	581	!-- If required, compute liquid water content
[1015]	582	IF ( cloud_physics ) THEN
	583	CALL calc_liquid_water_content
	584	!$acc update device( ql )
	585	ENDIF
[1115]	586	!
	587	!-- If required, compute virtual potential temperature
	588	IF ( humidity ) THEN
	589	CALL compute_vpt
	590	!$acc update device( vpt )
	591	ENDIF
[1]	592	!
	593	!-- Compute the diffusion quantities
	594	IF ( .NOT. constant_diffusion ) THEN
	595
	596	!
[1276]	597	!-- Determine surface fluxes shf and qsws and surface values
	598	!-- pt_surface and q_surface in dependence on data from external
	599	!-- file LSF_DATA respectively
	600	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
	601	intermediate_timestep_count == intermediate_timestep_count_max )&
	602	THEN
	603	CALL ls_forcing_surf ( simulated_time )
	604	ENDIF
	605
	606	!
[1]	607	!-- First the vertical fluxes in the Prandtl layer are being computed
	608	IF ( prandtl_layer ) THEN
	609	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'start' )
	610	CALL prandtl_fluxes
	611	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'stop' )
	612	ENDIF
[1241]	613
[1]	614	!
	615	!-- Compute the diffusion coefficients
	616	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
[75]	617	IF ( .NOT. humidity ) THEN
[97]	618	IF ( ocean ) THEN
[388]	619	CALL diffusivities( prho, prho_reference )
[97]	620	ELSE
	621	CALL diffusivities( pt, pt_reference )
	622	ENDIF
[1]	623	ELSE
[97]	624	CALL diffusivities( vpt, pt_reference )
[1]	625	ENDIF
	626	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
	627
	628	ENDIF
	629
	630	ENDDO ! Intermediate step loop
	631
	632	!
	633	!-- Increase simulation time and output times
[1111]	634	nr_timesteps_this_run = nr_timesteps_this_run + 1
[291]	635	current_timestep_number = current_timestep_number + 1
	636	simulated_time = simulated_time + dt_3d
	637	simulated_time_chr = time_to_string( simulated_time )
	638	time_since_reference_point = simulated_time - coupling_start_time
	639
[1]	640	IF ( simulated_time >= skip_time_data_output_av ) THEN
	641	time_do_av = time_do_av + dt_3d
	642	ENDIF
	643	IF ( simulated_time >= skip_time_do2d_xy ) THEN
	644	time_do2d_xy = time_do2d_xy + dt_3d
	645	ENDIF
	646	IF ( simulated_time >= skip_time_do2d_xz ) THEN
	647	time_do2d_xz = time_do2d_xz + dt_3d
	648	ENDIF
	649	IF ( simulated_time >= skip_time_do2d_yz ) THEN
	650	time_do2d_yz = time_do2d_yz + dt_3d
	651	ENDIF
	652	IF ( simulated_time >= skip_time_do3d ) THEN
	653	time_do3d = time_do3d + dt_3d
	654	ENDIF
[410]	655	DO mid = 1, masks
	656	IF ( simulated_time >= skip_time_domask(mid) ) THEN
	657	time_domask(mid)= time_domask(mid) + dt_3d
	658	ENDIF
	659	ENDDO
[1]	660	time_dvrp = time_dvrp + dt_3d
	661	IF ( simulated_time >= skip_time_dosp ) THEN
	662	time_dosp = time_dosp + dt_3d
	663	ENDIF
	664	time_dots = time_dots + dt_3d
[849]	665	IF ( .NOT. first_call_lpm ) THEN
[1]	666	time_dopts = time_dopts + dt_3d
	667	ENDIF
	668	IF ( simulated_time >= skip_time_dopr ) THEN
	669	time_dopr = time_dopr + dt_3d
	670	ENDIF
	671	time_dopr_listing = time_dopr_listing + dt_3d
	672	time_run_control = time_run_control + dt_3d
	673
	674	!
[102]	675	!-- Data exchange between coupled models
[291]	676	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[102]	677	time_coupling = time_coupling + dt_3d
[343]	678
[108]	679	!
	680	!-- In case of model termination initiated by the local model
	681	!-- (terminate_coupled > 0), the coupler must be skipped because it would
	682	!-- cause an MPI intercomminucation hang.
	683	!-- If necessary, the coupler will be called at the beginning of the
	684	!-- next restart run.
	685	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
[102]	686	CALL surface_coupler
	687	time_coupling = time_coupling - dt_coupling
	688	ENDDO
	689	ENDIF
	690
	691	!
[46]	692	!-- Execute user-defined actions
	693	CALL user_actions( 'after_integration' )
	694
	695	!
[1]	696	!-- If Galilei transformation is used, determine the distance that the
	697	!-- model has moved so far
	698	IF ( galilei_transformation ) THEN
	699	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
	700	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
	701	ENDIF
	702
	703	!
	704	!-- Check, if restart is necessary (because cpu-time is expiring or
	705	!-- because it is forced by user) and set stop flag
[108]	706	!-- This call is skipped if the remote model has already initiated a restart.
	707	IF ( .NOT. terminate_run ) CALL check_for_restart
[1]	708
	709	!
	710	!-- Carry out statistical analysis and output at the requested output times.
	711	!-- The MOD function is used for calculating the output time counters (like
	712	!-- time_dopr) in order to regard a possible decrease of the output time
	713	!-- interval in case of restart runs
	714
	715	!
	716	!-- Set a flag indicating that so far no statistics have been created
	717	!-- for this time step
	718	flow_statistics_called = .FALSE.
	719
	720	!
	721	!-- If required, call flow_statistics for averaging in time
[1342]	722	IF ( averaging_interval_pr /= 0.0_wp .AND. &
[1]	723	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
	724	simulated_time >= skip_time_dopr ) THEN
	725	time_dopr_av = time_dopr_av + dt_3d
	726	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
	727	do_sum = .TRUE.
	728	time_dopr_av = MOD( time_dopr_av, &
	729	MAX( dt_averaging_input_pr, dt_3d ) )
	730	ENDIF
	731	ENDIF
	732	IF ( do_sum ) CALL flow_statistics
	733
	734	!
[410]	735	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
[1342]	736	IF ( averaging_interval /= 0.0_wp .AND. &
[1]	737	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
	738	simulated_time >= skip_time_data_output_av ) &
	739	THEN
	740	time_do_sla = time_do_sla + dt_3d
	741	IF ( time_do_sla >= dt_averaging_input ) THEN
	742	CALL sum_up_3d_data
	743	average_count_3d = average_count_3d + 1
	744	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
	745	ENDIF
	746	ENDIF
	747
	748	!
	749	!-- Calculate spectra for time averaging
[1342]	750	IF ( averaging_interval_sp /= 0.0_wp .AND. &
[1]	751	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
	752	simulated_time >= skip_time_dosp ) THEN
	753	time_dosp_av = time_dosp_av + dt_3d
	754	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
	755	CALL calc_spectra
	756	time_dosp_av = MOD( time_dosp_av, &
	757	MAX( dt_averaging_input_pr, dt_3d ) )
	758	ENDIF
	759	ENDIF
	760
	761	!
	762	!-- Computation and output of run control parameters.
[1001]	763	!-- This is also done whenever perturbations have been imposed
[1]	764	IF ( time_run_control >= dt_run_control .OR. &
[1001]	765	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
[1]	766	THEN
	767	CALL run_control
	768	IF ( time_run_control >= dt_run_control ) THEN
	769	time_run_control = MOD( time_run_control, &
	770	MAX( dt_run_control, dt_3d ) )
	771	ENDIF
	772	ENDIF
	773
	774	!
	775	!-- Profile output (ASCII) on file
	776	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
	777	CALL print_1d
	778	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
	779	dt_3d ) )
	780	ENDIF
	781
	782	!
	783	!-- Graphic output for PROFIL
	784	IF ( time_dopr >= dt_dopr ) THEN
	785	IF ( dopr_n /= 0 ) CALL data_output_profiles
	786	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
[1342]	787	time_dopr_av = 0.0_wp ! due to averaging (see above)
[1]	788	ENDIF
	789
	790	!
	791	!-- Graphic output for time series
	792	IF ( time_dots >= dt_dots ) THEN
[48]	793	CALL data_output_tseries
[1]	794	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
	795	ENDIF
	796
	797	!
	798	!-- Output of spectra (formatted for use with PROFIL), in case of no
	799	!-- time averaging, spectra has to be calculated before
	800	IF ( time_dosp >= dt_dosp ) THEN
	801	IF ( average_count_sp == 0 ) CALL calc_spectra
	802	CALL data_output_spectra
	803	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
	804	ENDIF
	805
	806	!
	807	!-- 2d-data output (cross-sections)
	808	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
	809	CALL data_output_2d( 'xy', 0 )
	810	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
	811	ENDIF
	812	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
	813	CALL data_output_2d( 'xz', 0 )
	814	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
	815	ENDIF
	816	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
	817	CALL data_output_2d( 'yz', 0 )
	818	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
	819	ENDIF
	820
	821	!
	822	!-- 3d-data output (volume data)
	823	IF ( time_do3d >= dt_do3d ) THEN
	824	CALL data_output_3d( 0 )
	825	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
	826	ENDIF
	827
	828	!
[410]	829	!-- masked data output
[1308]	830	!-- Parallel netcdf output is not tested so far for masked data, hence
	831	!-- netcdf_data_format is switched back to non-paralell output.
	832	netcdf_data_format_save = netcdf_data_format
	833	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	834	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	835	DO mid = 1, masks
	836	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
	837	CALL data_output_mask( 0 )
	838	time_domask(mid) = MOD( time_domask(mid), &
	839	MAX( dt_domask(mid), dt_3d ) )
	840	ENDIF
	841	ENDDO
[1308]	842	netcdf_data_format = netcdf_data_format_save
[410]	843
	844	!
	845	!-- Output of time-averaged 2d/3d/masked data
[1]	846	IF ( time_do_av >= dt_data_output_av ) THEN
	847	CALL average_3d_data
	848	CALL data_output_2d( 'xy', 1 )
	849	CALL data_output_2d( 'xz', 1 )
	850	CALL data_output_2d( 'yz', 1 )
	851	CALL data_output_3d( 1 )
[1308]	852	!-- Parallel netcdf output is not tested so far for masked data, hence
	853	!-- netcdf_data_format is switched back to non-paralell output.
	854	netcdf_data_format_save = netcdf_data_format
	855	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	856	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	857	DO mid = 1, masks
	858	CALL data_output_mask( 1 )
	859	ENDDO
[1308]	860	netcdf_data_format = netcdf_data_format_save
[1]	861	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
	862	ENDIF
	863
	864	!
	865	!-- Output of particle time series
[253]	866	IF ( particle_advection ) THEN
	867	IF ( time_dopts >= dt_dopts .OR. &
	868	( simulated_time >= particle_advection_start .AND. &
[849]	869	first_call_lpm ) ) THEN
[253]	870	CALL data_output_ptseries
	871	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
	872	ENDIF
[1]	873	ENDIF
	874
	875	!
	876	!-- Output of dvrp-graphics (isosurface, particles, slicer)
	877	#if defined( __dvrp_graphics )
	878	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
	879	#endif
	880	IF ( time_dvrp >= dt_dvrp ) THEN
	881	CALL data_output_dvrp
	882	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
	883	ENDIF
	884	#if defined( __dvrp_graphics )
	885	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	886	#endif
	887
	888	!
	889	!-- If required, set the heat flux for the next time step at a random value
	890	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
	891
	892	!
	893	!-- Execute user-defined actions
	894	CALL user_actions( 'after_timestep' )
	895
	896	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
	897
[667]	898
[1]	899	ENDDO ! time loop
	900
	901	#if defined( __dvrp_graphics )
	902	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
	903	#endif
	904
	905	END SUBROUTINE time_integration

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