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source: palm/trunk/SOURCE/time_integration.f90 @ 1252

Last change on this file since 1252 was 1242, checked in by heinze, 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	!
	17	! Copyright 1997-2012 Leibniz University Hannover
	18	!--------------------------------------------------------------------------------!
	19	!
[484]	20	! Current revisions:
[1092]	21	! ------------------
[1132]	22	!
[1242]	23	!
[1132]	24	! Former revisions:
	25	! -----------------
	26	! $Id: time_integration.f90 1242 2013-10-30 11:50:11Z heinze $
	27	!
[1242]	28	! 1241 2013-10-30 11:36:58Z heinze
	29	! Generalize calc_mean_profile for wider use
	30	! Determine shf and qsws in dependence on data from LSF_DATA
	31	! Determine ug and vg in dependence on data from LSF_DATA
[1222]	32	! 1221 2013-09-10 08:59:13Z raasch
	33	! host update of arrays before timestep is called
	34	!
[1182]	35	! 1179 2013-06-14 05:57:58Z raasch
	36	! mean profiles for reference state are only calculated if required,
	37	! small bugfix for background communication
	38	!
[1172]	39	! 1171 2013-05-30 11:27:45Z raasch
	40	! split of prognostic_equations deactivated (comment lines), for the time being
	41	!
[1132]	42	! 1128 2013-04-12 06:19:32Z raasch
[1128]	43	! asynchronous transfer of ghost point data realized for acc-optimized version:
	44	! prognostic_equations are first called two times for those points required for
	45	! the left-right and north-south exchange, respectively, and then for the
	46	! remaining points,
	47	! those parts requiring global communication moved from prognostic_equations to
	48	! here
[392]	49	!
[1116]	50	! 1115 2013-03-26 18:16:16Z hoffmann
	51	! calculation of qr and nr is restricted to precipitation
	52	!
[1114]	53	! 1113 2013-03-10 02:48:14Z raasch
	54	! GPU-porting of boundary conditions,
	55	! openACC directives updated
	56	! formal parameter removed from routine boundary_conds
	57	!
[1112]	58	! 1111 2013-03-08 23:54:10Z raasch
	59	! +internal timestep counter for cpu statistics added,
	60	! openACC directives updated
	61	!
[1093]	62	! 1092 2013-02-02 11:24:22Z raasch
	63	! unused variables removed
	64	!
[1066]	65	! 1065 2012-11-22 17:42:36Z hoffmann
	66	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
	67	!
[1054]	68	! 1053 2012-11-13 17:11:03Z hoffmann
	69	! exchange of ghost points for nr, qr added
	70	!
[1037]	71	! 1036 2012-10-22 13:43:42Z raasch
	72	! code put under GPL (PALM 3.9)
	73	!
[1020]	74	! 1019 2012-09-28 06:46:45Z raasch
	75	! non-optimized version of prognostic_equations removed
	76	!
[1017]	77	! 1015 2012-09-27 09:23:24Z raasch
	78	! +call of prognostic_equations_acc
	79	!
[1002]	80	! 1001 2012-09-13 14:08:46Z raasch
	81	! all actions concerning leapfrog- and upstream-spline-scheme removed
	82	!
[850]	83	! 849 2012-03-15 10:35:09Z raasch
	84	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
	85	!
[826]	86	! 825 2012-02-19 03:03:44Z raasch
	87	! wang_collision_kernel renamed wang_kernel
	88	!
[791]	89	! 790 2011-11-29 03:11:20Z raasch
	90	! exchange of ghostpoints for array diss
	91	!
[708]	92	! 707 2011-03-29 11:39:40Z raasch
	93	! bc_lr/ns replaced by bc_lr/ns_cyc, calls of exchange_horiz are modified,
	94	! adaption to sloping surface
	95	!
[668]	96	! 667 2010-12-23 12:06:00Z suehring/gryschka
	97	! Calls of exchange_horiz are modified.
	98	! Adaption to slooping surface.
	99	!
[482]	100	! 449 2010-02-02 11:23:59Z raasch
	101	! Bugfix: exchange of ghost points for prho included
	102	!
[449]	103	! 410 2009-12-04 17:05:40Z letzel
	104	! masked data output
	105	!
[392]	106	! 388 2009-09-23 09:40:33Z raasch
[388]	107	! Using prho instead of rho in diffusvities.
[291]	108	! Coupling with independent precursor runs.
	109	! Bugfix: output of particle time series only if particle advection is switched
[253]	110	! on
[110]	111	!
[198]	112	! 151 2008-03-07 13:42:18Z raasch
	113	! inflow turbulence is imposed by calling new routine inflow_turbulence
	114	!
[110]	115	! 108 2007-08-24 15:10:38Z letzel
[106]	116	! Call of new routine surface_coupler,
	117	! presure solver is called after the first Runge-Kutta substep instead of the
	118	! last in case that call_psolver_at_all_substeps = .F.; for this case, the
	119	! random perturbation has to be added to the velocity fields also after the
	120	! first substep
[77]	121	!
[98]	122	! 97 2007-06-21 08:23:15Z raasch
	123	! diffusivities is called with argument rho in case of ocean runs,
	124	! new argument pt_/prho_reference in calls of diffusivities,
	125	! ghostpoint exchange for salinity and density
	126	!
[90]	127	! 87 2007-05-22 15:46:47Z raasch
	128	! var_hom renamed pr_palm
	129	!
[77]	130	! 75 2007-03-22 09:54:05Z raasch
[46]	131	! Move call of user_actions( 'after_integration' ) below increment of times
[63]	132	! and counters,
	133	! calls of prognostic_equations_.. changed to .._noopt, .._cache, and
[75]	134	! .._vector, these calls are now controlled by switch loop_optimization,
	135	! uxrp, vynp eliminated, 2nd+3rd argument removed from exchange horiz,
	136	! moisture renamed humidity
[1]	137	!
[3]	138	! RCS Log replace by Id keyword, revision history cleaned up
	139	!
[1]	140	! Revision 1.8 2006/08/22 14:16:05 raasch
	141	! Disturbances are imposed only for the last Runge-Kutta-substep
	142	!
	143	! Revision 1.2 2004/04/30 13:03:40 raasch
	144	! decalpha-specific warning removed, routine name changed to time_integration,
	145	! particle advection is carried out only once during the intermediate steps,
	146	! impulse_advec renamed momentum_advec
	147	!
	148	! Revision 1.1 1997/08/11 06:19:04 raasch
	149	! Initial revision
	150	!
	151	!
	152	! Description:
	153	! ------------
	154	! Integration in time of the model equations, statistical analysis and graphic
	155	! output
	156	!------------------------------------------------------------------------------!
	157
[1128]	158	USE advec_ws
[1]	159	USE arrays_3d
	160	USE averaging
[1128]	161	USE buoyancy_mod
[1]	162	USE control_parameters
	163	USE cpulog
	164	#if defined( __dvrp_graphics )
	165	USE DVRP
	166	#endif
	167	USE grid_variables
	168	USE indices
	169	USE interaction_droplets_ptq_mod
	170	USE interfaces
[1241]	171	USE ls_forcing_mod
[1]	172	USE particle_attributes
	173	USE pegrid
[1128]	174	USE production_e_mod
[1]	175	USE prognostic_equations_mod
	176	USE statistics
	177	USE user_actions_mod
	178
	179	IMPLICIT NONE
	180
	181	CHARACTER (LEN=9) :: time_to_string
	182
	183	!
	184	!-- At the beginning of a simulation determine the time step as well as
	185	!-- determine and print out the run control parameters
	186	IF ( simulated_time == 0.0 ) CALL timestep
[667]	187
[1]	188	CALL run_control
	189
[667]	190
[108]	191	!
	192	!-- Data exchange between coupled models in case that a call has been omitted
	193	!-- at the end of the previous run of a job chain.
[291]	194	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[108]	195	!
	196	!-- In case of model termination initiated by the local model the coupler
	197	!-- must not be called because this would again cause an MPI hang.
	198	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
	199	CALL surface_coupler
	200	time_coupling = time_coupling - dt_coupling
	201	ENDDO
[348]	202	IF (time_coupling == 0.0 .AND. time_since_reference_point < dt_coupling)&
	203	THEN
	204	time_coupling = time_since_reference_point
	205	ENDIF
[108]	206	ENDIF
	207
	208
[1]	209	#if defined( __dvrp_graphics )
	210	!
	211	!-- Time measurement with dvrp software
	212	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	213	#endif
	214
	215	!
	216	!-- Start of the time loop
	217	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
	218	.NOT. terminate_run )
	219
	220	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
[1221]	221
[1]	222	!
	223	!-- Determine size of next time step
[1221]	224	IF ( simulated_time /= 0.0 ) THEN
	225	!$acc update host( kh, km, u, v, w )
	226	CALL timestep
	227	ENDIF
	228
[1]	229	!
[1241]	230	!-- Determine ug, vg and w_subs in dependence on data from external file
	231	!-- LSF_DATA
	232	IF ( large_scale_forcing .AND. lsf_vert ) THEN
	233	CALL ls_forcing_vert ( simulated_time )
	234	ENDIF
	235
	236	!
[1]	237	!-- Execute the user-defined actions
	238	CALL user_actions( 'before_timestep' )
	239
	240	!
	241	!-- Start of intermediate step loop
	242	intermediate_timestep_count = 0
	243	DO WHILE ( intermediate_timestep_count < &
	244	intermediate_timestep_count_max )
	245
	246	intermediate_timestep_count = intermediate_timestep_count + 1
	247
	248	!
	249	!-- Set the steering factors for the prognostic equations which depend
	250	!-- on the timestep scheme
	251	CALL timestep_scheme_steering
	252
	253	!
[1128]	254	!-- Calculate those variables needed in the tendency terms which need
	255	!-- global communication
[1179]	256	IF ( .NOT. use_single_reference_value .AND. &
	257	.NOT. use_initial_profile_as_reference ) THEN
	258	!
	259	!-- Horizontally averaged profiles to be used as reference state in
	260	!-- buoyancy terms (WARNING: only the respective last call of
	261	!-- calc_mean_profile defines the reference state!)
[1241]	262	IF ( .NOT. neutral ) CALL calc_mean_profile( pt, 4, 'time_int' )
	263	IF ( ocean ) CALL calc_mean_profile( rho, 64, 'time_int' )
	264	IF ( humidity ) CALL calc_mean_profile( vpt, 44, 'time_int' )
[1179]	265	ENDIF
	266
[1128]	267	IF ( .NOT. constant_diffusion ) CALL production_e_init
	268	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
	269	intermediate_timestep_count == 1 ) CALL ws_statistics
	270
	271	!
[1]	272	!-- Solve the prognostic equations. A fast cache optimized version with
	273	!-- only one single loop is used in case of Piascek-Williams advection
	274	!-- scheme. NEC vector machines use a different version, because
	275	!-- in the other versions a good vectorization is prohibited due to
	276	!-- inlining problems.
[1019]	277	IF ( loop_optimization == 'cache' ) THEN
	278	CALL prognostic_equations_cache
	279	ELSEIF ( loop_optimization == 'vector' ) THEN
[63]	280	CALL prognostic_equations_vector
[1015]	281	ELSEIF ( loop_optimization == 'acc' ) THEN
[1171]	282	i_left = nxl; i_right = nxr
	283	j_south = nys; j_north = nyn
	284	CALL prognostic_equations_acc
	285
	286	! i_left = nxl; i_right = nxl+nbgp-1
[1128]	287	! j_south = nys; j_north = nyn
	288	! CALL prognostic_equations_acc
[1171]	289	! i_left = nxr-nbgp+1; i_right = nxr
	290	! j_south = nys; j_north = nyn
	291	! CALL prognostic_equations_acc
[1128]	292
	293	!
	294	!-- Exchange of ghost points (lateral boundary conditions)
	295	IF ( background_communication ) THEN
	296
	297	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
	298
	299	send_receive = 'lr'
	300	sendrecv_in_background = .TRUE.
	301	req = 0
	302	req_count = 0
	303
	304	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	305	on_device = .TRUE. ! to be removed after complete porting
	306	ELSE ! of ghost point exchange
	307	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	308	ENDIF
	309
	310	CALL exchange_horiz( u_p, nbgp )
	311	CALL exchange_horiz( v_p, nbgp )
	312	CALL exchange_horiz( w_p, nbgp )
	313	CALL exchange_horiz( pt_p, nbgp )
	314	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	315	IF ( ocean ) THEN
	316	CALL exchange_horiz( sa_p, nbgp )
	317	CALL exchange_horiz( rho, nbgp )
	318	CALL exchange_horiz( prho, nbgp )
	319	ENDIF
	320	IF (humidity .OR. passive_scalar) THEN
	321	CALL exchange_horiz( q_p, nbgp )
	322	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	323	CALL exchange_horiz( qr_p, nbgp )
	324	CALL exchange_horiz( nr_p, nbgp )
	325	ENDIF
	326	ENDIF
	327	IF ( cloud_droplets ) THEN
	328	CALL exchange_horiz( ql, nbgp )
	329	CALL exchange_horiz( ql_c, nbgp )
	330	CALL exchange_horiz( ql_v, nbgp )
	331	CALL exchange_horiz( ql_vp, nbgp )
	332	ENDIF
	333	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	334
	335	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	336	on_device = .FALSE. ! to be removed after complete porting
	337	ELSE ! of ghost point exchange
	338	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	339	ENDIF
	340
	341	sendrecv_in_background = .FALSE.
	342
	343	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
	344
	345	ENDIF
	346
[1171]	347	! i_left = nxl+nbgp; i_right = nxr-nbgp
	348	! j_south = nys; j_north = nys+nbgp-1
	349	! CALL prognostic_equations_acc
	350	! i_left = nxl+nbgp; i_right = nxr-nbgp
	351	! j_south = nyn-nbgp+1; j_north = nyn
	352	! CALL prognostic_equations_acc
[1128]	353
	354	IF ( background_communication ) THEN
	355	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
	356	#if defined( __parallel )
	357	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	358	#endif
	359	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
	360
	361	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
	362
	363	send_receive = 'ns'
	364	sendrecv_in_background = .TRUE.
	365	req = 0
	366	req_count = 0
	367
	368	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	369	on_device = .TRUE. ! to be removed after complete porting
	370	ELSE ! of ghost point exchange
	371	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	372	ENDIF
	373
	374	CALL exchange_horiz( u_p, nbgp )
	375	CALL exchange_horiz( v_p, nbgp )
	376	CALL exchange_horiz( w_p, nbgp )
	377	CALL exchange_horiz( pt_p, nbgp )
	378	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	379	IF ( ocean ) THEN
	380	CALL exchange_horiz( sa_p, nbgp )
	381	CALL exchange_horiz( rho, nbgp )
	382	CALL exchange_horiz( prho, nbgp )
	383	ENDIF
	384	IF (humidity .OR. passive_scalar) THEN
	385	CALL exchange_horiz( q_p, nbgp )
	386	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	387	CALL exchange_horiz( qr_p, nbgp )
	388	CALL exchange_horiz( nr_p, nbgp )
	389	ENDIF
	390	ENDIF
	391	IF ( cloud_droplets ) THEN
	392	CALL exchange_horiz( ql, nbgp )
	393	CALL exchange_horiz( ql_c, nbgp )
	394	CALL exchange_horiz( ql_v, nbgp )
	395	CALL exchange_horiz( ql_vp, nbgp )
	396	ENDIF
	397	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	398
	399	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	400	on_device = .FALSE. ! to be removed after complete porting
	401	ELSE ! of ghost point exchange
	402	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	403	ENDIF
	404
	405	sendrecv_in_background = .FALSE.
	406
	407	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	408
	409	ENDIF
	410
[1171]	411	! i_left = nxl+nbgp; i_right = nxr-nbgp
	412	! j_south = nys+nbgp; j_north = nyn-nbgp
	413	! CALL prognostic_equations_acc
[1128]	414
	415	IF ( background_communication ) THEN
	416	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
	417	#if defined( __parallel )
	418	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	419	#endif
	420	send_receive = 'al'
	421	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
	422	ENDIF
	423
[1]	424	ENDIF
	425
	426	!
[849]	427	!-- Particle transport/physics with the Lagrangian particle model
	428	!-- (only once during intermediate steps, because it uses an Euler-step)
[1128]	429	!-- ### particle model should be moved before prognostic_equations, in order
	430	!-- to regard droplet interactions directly
[63]	431	IF ( particle_advection .AND. &
	432	simulated_time >= particle_advection_start .AND. &
[1]	433	intermediate_timestep_count == 1 ) THEN
[849]	434	CALL lpm
	435	first_call_lpm = .FALSE.
[1]	436	ENDIF
	437
	438	!
	439	!-- Interaction of droplets with temperature and specific humidity.
	440	!-- Droplet condensation and evaporation is calculated within
	441	!-- advec_particles.
	442	IF ( cloud_droplets .AND. &
	443	intermediate_timestep_count == intermediate_timestep_count_max )&
	444	THEN
	445	CALL interaction_droplets_ptq
	446	ENDIF
	447
	448	!
	449	!-- Exchange of ghost points (lateral boundary conditions)
[1128]	450	IF ( .NOT. background_communication ) THEN
[1113]	451
[1128]	452	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
[1113]	453
[1128]	454	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	455	on_device = .TRUE. ! to be removed after complete porting
	456	ELSE ! of ghost point exchange
	457	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
[1053]	458	ENDIF
[1]	459
[1128]	460	CALL exchange_horiz( u_p, nbgp )
	461	CALL exchange_horiz( v_p, nbgp )
	462	CALL exchange_horiz( w_p, nbgp )
	463	CALL exchange_horiz( pt_p, nbgp )
	464	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	465	IF ( ocean ) THEN
	466	CALL exchange_horiz( sa_p, nbgp )
	467	CALL exchange_horiz( rho, nbgp )
	468	CALL exchange_horiz( prho, nbgp )
	469	ENDIF
	470	IF (humidity .OR. passive_scalar) THEN
	471	CALL exchange_horiz( q_p, nbgp )
[1179]	472	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
	473	precipitation ) THEN
[1128]	474	CALL exchange_horiz( qr_p, nbgp )
	475	CALL exchange_horiz( nr_p, nbgp )
	476	ENDIF
	477	ENDIF
	478	IF ( cloud_droplets ) THEN
	479	CALL exchange_horiz( ql, nbgp )
	480	CALL exchange_horiz( ql_c, nbgp )
	481	CALL exchange_horiz( ql_v, nbgp )
	482	CALL exchange_horiz( ql_vp, nbgp )
	483	ENDIF
	484	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	485
	486	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	487	on_device = .FALSE. ! to be removed after complete porting
	488	ELSE ! of ghost point exchange
	489	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	490	ENDIF
	491
	492	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	493
[1113]	494	ENDIF
	495
[1]	496	!
	497	!-- Boundary conditions for the prognostic quantities (except of the
	498	!-- velocities at the outflow in case of a non-cyclic lateral wall)
[1113]	499	CALL boundary_conds
[1]	500
	501	!
[73]	502	!-- Swap the time levels in preparation for the next time step.
	503	CALL swap_timelevel
	504
	505	!
[1]	506	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
	507	!-- when a sloping surface is used
	508	IF ( sloping_surface ) THEN
[707]	509	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
	510	pt_slope_offset
	511	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
	512	pt_slope_offset
[1]	513	ENDIF
	514
	515	!
[151]	516	!-- Impose a turbulent inflow using the recycling method
	517	IF ( turbulent_inflow ) CALL inflow_turbulence
	518
	519	!
[1]	520	!-- Impose a random perturbation on the horizontal velocity field
[106]	521	IF ( create_disturbances .AND. &
	522	( call_psolver_at_all_substeps .AND. &
[1]	523	intermediate_timestep_count == intermediate_timestep_count_max )&
[106]	524	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
	525	intermediate_timestep_count == 1 ) ) &
[1]	526	THEN
	527	time_disturb = time_disturb + dt_3d
	528	IF ( time_disturb >= dt_disturb ) THEN
[1111]	529	!$acc update host( u, v )
[1113]	530	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
[87]	531	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
[75]	532	CALL disturb_field( nzb_u_inner, tend, u )
	533	CALL disturb_field( nzb_v_inner, tend, v )
[707]	534	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
[1]	535	!
	536	!-- Runs with a non-cyclic lateral wall need perturbations
	537	!-- near the inflow throughout the whole simulation
	538	dist_range = 1
[75]	539	CALL disturb_field( nzb_u_inner, tend, u )
	540	CALL disturb_field( nzb_v_inner, tend, v )
[1]	541	dist_range = 0
	542	ENDIF
[1113]	543	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
[1111]	544	!$acc update device( u, v )
[1]	545	time_disturb = time_disturb - dt_disturb
	546	ENDIF
	547	ENDIF
	548
	549	!
	550	!-- Reduce the velocity divergence via the equation for perturbation
	551	!-- pressure.
[106]	552	IF ( intermediate_timestep_count == 1 .OR. &
	553	call_psolver_at_all_substeps ) THEN
[1]	554	CALL pres
	555	ENDIF
	556
	557	!
	558	!-- If required, compute liquid water content
[1015]	559	IF ( cloud_physics ) THEN
	560	CALL calc_liquid_water_content
	561	!$acc update device( ql )
	562	ENDIF
[1115]	563	!
	564	!-- If required, compute virtual potential temperature
	565	IF ( humidity ) THEN
	566	CALL compute_vpt
	567	!$acc update device( vpt )
	568	ENDIF
[1]	569	!
	570	!-- Compute the diffusion quantities
	571	IF ( .NOT. constant_diffusion ) THEN
	572
	573	!
	574	!-- First the vertical fluxes in the Prandtl layer are being computed
	575	IF ( prandtl_layer ) THEN
	576	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'start' )
	577	CALL prandtl_fluxes
	578	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'stop' )
	579	ENDIF
[1241]	580
[1]	581	!
[1241]	582	!-- Determine shf and qsws in dependence on data from external file
	583	!-- LSF_DATA
	584	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
	585	intermediate_timestep_count == intermediate_timestep_count_max )&
	586	THEN
	587	CALL ls_forcing_surf ( simulated_time )
	588	ENDIF
	589
	590	!
[1]	591	!-- Compute the diffusion coefficients
	592	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
[75]	593	IF ( .NOT. humidity ) THEN
[97]	594	IF ( ocean ) THEN
[388]	595	CALL diffusivities( prho, prho_reference )
[97]	596	ELSE
	597	CALL diffusivities( pt, pt_reference )
	598	ENDIF
[1]	599	ELSE
[97]	600	CALL diffusivities( vpt, pt_reference )
[1]	601	ENDIF
	602	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
	603
	604	ENDIF
	605
	606	ENDDO ! Intermediate step loop
	607
	608	!
	609	!-- Increase simulation time and output times
[1111]	610	nr_timesteps_this_run = nr_timesteps_this_run + 1
[291]	611	current_timestep_number = current_timestep_number + 1
	612	simulated_time = simulated_time + dt_3d
	613	simulated_time_chr = time_to_string( simulated_time )
	614	time_since_reference_point = simulated_time - coupling_start_time
	615
[1]	616	IF ( simulated_time >= skip_time_data_output_av ) THEN
	617	time_do_av = time_do_av + dt_3d
	618	ENDIF
	619	IF ( simulated_time >= skip_time_do2d_xy ) THEN
	620	time_do2d_xy = time_do2d_xy + dt_3d
	621	ENDIF
	622	IF ( simulated_time >= skip_time_do2d_xz ) THEN
	623	time_do2d_xz = time_do2d_xz + dt_3d
	624	ENDIF
	625	IF ( simulated_time >= skip_time_do2d_yz ) THEN
	626	time_do2d_yz = time_do2d_yz + dt_3d
	627	ENDIF
	628	IF ( simulated_time >= skip_time_do3d ) THEN
	629	time_do3d = time_do3d + dt_3d
	630	ENDIF
[410]	631	DO mid = 1, masks
	632	IF ( simulated_time >= skip_time_domask(mid) ) THEN
	633	time_domask(mid)= time_domask(mid) + dt_3d
	634	ENDIF
	635	ENDDO
[1]	636	time_dvrp = time_dvrp + dt_3d
	637	IF ( simulated_time >= skip_time_dosp ) THEN
	638	time_dosp = time_dosp + dt_3d
	639	ENDIF
	640	time_dots = time_dots + dt_3d
[849]	641	IF ( .NOT. first_call_lpm ) THEN
[1]	642	time_dopts = time_dopts + dt_3d
	643	ENDIF
	644	IF ( simulated_time >= skip_time_dopr ) THEN
	645	time_dopr = time_dopr + dt_3d
	646	ENDIF
	647	time_dopr_listing = time_dopr_listing + dt_3d
	648	time_run_control = time_run_control + dt_3d
	649
	650	!
[102]	651	!-- Data exchange between coupled models
[291]	652	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[102]	653	time_coupling = time_coupling + dt_3d
[343]	654
[108]	655	!
	656	!-- In case of model termination initiated by the local model
	657	!-- (terminate_coupled > 0), the coupler must be skipped because it would
	658	!-- cause an MPI intercomminucation hang.
	659	!-- If necessary, the coupler will be called at the beginning of the
	660	!-- next restart run.
	661	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
[102]	662	CALL surface_coupler
	663	time_coupling = time_coupling - dt_coupling
	664	ENDDO
	665	ENDIF
	666
	667	!
[46]	668	!-- Execute user-defined actions
	669	CALL user_actions( 'after_integration' )
	670
	671	!
[1]	672	!-- If Galilei transformation is used, determine the distance that the
	673	!-- model has moved so far
	674	IF ( galilei_transformation ) THEN
	675	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
	676	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
	677	ENDIF
	678
	679	!
	680	!-- Check, if restart is necessary (because cpu-time is expiring or
	681	!-- because it is forced by user) and set stop flag
[108]	682	!-- This call is skipped if the remote model has already initiated a restart.
	683	IF ( .NOT. terminate_run ) CALL check_for_restart
[1]	684
	685	!
	686	!-- Carry out statistical analysis and output at the requested output times.
	687	!-- The MOD function is used for calculating the output time counters (like
	688	!-- time_dopr) in order to regard a possible decrease of the output time
	689	!-- interval in case of restart runs
	690
	691	!
	692	!-- Set a flag indicating that so far no statistics have been created
	693	!-- for this time step
	694	flow_statistics_called = .FALSE.
	695
	696	!
	697	!-- If required, call flow_statistics for averaging in time
	698	IF ( averaging_interval_pr /= 0.0 .AND. &
	699	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
	700	simulated_time >= skip_time_dopr ) THEN
	701	time_dopr_av = time_dopr_av + dt_3d
	702	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
	703	do_sum = .TRUE.
	704	time_dopr_av = MOD( time_dopr_av, &
	705	MAX( dt_averaging_input_pr, dt_3d ) )
	706	ENDIF
	707	ENDIF
	708	IF ( do_sum ) CALL flow_statistics
	709
	710	!
[410]	711	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
[1]	712	IF ( averaging_interval /= 0.0 .AND. &
	713	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
	714	simulated_time >= skip_time_data_output_av ) &
	715	THEN
	716	time_do_sla = time_do_sla + dt_3d
	717	IF ( time_do_sla >= dt_averaging_input ) THEN
	718	CALL sum_up_3d_data
	719	average_count_3d = average_count_3d + 1
	720	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
	721	ENDIF
	722	ENDIF
	723
	724	!
	725	!-- Calculate spectra for time averaging
	726	IF ( averaging_interval_sp /= 0.0 .AND. &
	727	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
	728	simulated_time >= skip_time_dosp ) THEN
	729	time_dosp_av = time_dosp_av + dt_3d
	730	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
	731	CALL calc_spectra
	732	time_dosp_av = MOD( time_dosp_av, &
	733	MAX( dt_averaging_input_pr, dt_3d ) )
	734	ENDIF
	735	ENDIF
	736
	737	!
	738	!-- Computation and output of run control parameters.
[1001]	739	!-- This is also done whenever perturbations have been imposed
[1]	740	IF ( time_run_control >= dt_run_control .OR. &
[1001]	741	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
[1]	742	THEN
	743	CALL run_control
	744	IF ( time_run_control >= dt_run_control ) THEN
	745	time_run_control = MOD( time_run_control, &
	746	MAX( dt_run_control, dt_3d ) )
	747	ENDIF
	748	ENDIF
	749
	750	!
	751	!-- Profile output (ASCII) on file
	752	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
	753	CALL print_1d
	754	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
	755	dt_3d ) )
	756	ENDIF
	757
	758	!
	759	!-- Graphic output for PROFIL
	760	IF ( time_dopr >= dt_dopr ) THEN
	761	IF ( dopr_n /= 0 ) CALL data_output_profiles
	762	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
	763	time_dopr_av = 0.0 ! due to averaging (see above)
	764	ENDIF
	765
	766	!
	767	!-- Graphic output for time series
	768	IF ( time_dots >= dt_dots ) THEN
[48]	769	CALL data_output_tseries
[1]	770	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
	771	ENDIF
	772
	773	!
	774	!-- Output of spectra (formatted for use with PROFIL), in case of no
	775	!-- time averaging, spectra has to be calculated before
	776	IF ( time_dosp >= dt_dosp ) THEN
	777	IF ( average_count_sp == 0 ) CALL calc_spectra
	778	CALL data_output_spectra
	779	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
	780	ENDIF
	781
	782	!
	783	!-- 2d-data output (cross-sections)
	784	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
	785	CALL data_output_2d( 'xy', 0 )
	786	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
	787	ENDIF
	788	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
	789	CALL data_output_2d( 'xz', 0 )
	790	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
	791	ENDIF
	792	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
	793	CALL data_output_2d( 'yz', 0 )
	794	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
	795	ENDIF
	796
	797	!
	798	!-- 3d-data output (volume data)
	799	IF ( time_do3d >= dt_do3d ) THEN
	800	CALL data_output_3d( 0 )
	801	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
	802	ENDIF
	803
	804	!
[410]	805	!-- masked data output
	806	DO mid = 1, masks
	807	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
	808	CALL data_output_mask( 0 )
	809	time_domask(mid) = MOD( time_domask(mid), &
	810	MAX( dt_domask(mid), dt_3d ) )
	811	ENDIF
	812	ENDDO
	813
	814	!
	815	!-- Output of time-averaged 2d/3d/masked data
[1]	816	IF ( time_do_av >= dt_data_output_av ) THEN
	817	CALL average_3d_data
	818	CALL data_output_2d( 'xy', 1 )
	819	CALL data_output_2d( 'xz', 1 )
	820	CALL data_output_2d( 'yz', 1 )
	821	CALL data_output_3d( 1 )
[410]	822	DO mid = 1, masks
	823	CALL data_output_mask( 1 )
	824	ENDDO
[1]	825	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
	826	ENDIF
	827
	828	!
	829	!-- Output of particle time series
[253]	830	IF ( particle_advection ) THEN
	831	IF ( time_dopts >= dt_dopts .OR. &
	832	( simulated_time >= particle_advection_start .AND. &
[849]	833	first_call_lpm ) ) THEN
[253]	834	CALL data_output_ptseries
	835	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
	836	ENDIF
[1]	837	ENDIF
	838
	839	!
	840	!-- Output of dvrp-graphics (isosurface, particles, slicer)
	841	#if defined( __dvrp_graphics )
	842	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
	843	#endif
	844	IF ( time_dvrp >= dt_dvrp ) THEN
	845	CALL data_output_dvrp
	846	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
	847	ENDIF
	848	#if defined( __dvrp_graphics )
	849	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	850	#endif
	851
	852	!
	853	!-- If required, set the heat flux for the next time step at a random value
	854	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
	855
	856	!
	857	!-- Execute user-defined actions
	858	CALL user_actions( 'after_timestep' )
	859
	860	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
	861
[667]	862
[1]	863	ENDDO ! time loop
	864
	865	#if defined( __dvrp_graphics )
	866	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
	867	#endif
	868
	869	END SUBROUTINE time_integration

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