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source: palm/trunk/SOURCE/time_integration.f90 @ 1230

Last change on this file since 1230 was 1222, 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	!
	17	! Copyright 1997-2012 Leibniz University Hannover
	18	!--------------------------------------------------------------------------------!
	19	!
[484]	20	! Current revisions:
[1092]	21	! ------------------
[1132]	22	!
[1222]	23	!
[1132]	24	! Former revisions:
	25	! -----------------
	26	! $Id: time_integration.f90 1222 2013-09-10 14:48:09Z raasch $
	27	!
[1222]	28	! 1221 2013-09-10 08:59:13Z raasch
	29	! host update of arrays before timestep is called
	30	!
[1182]	31	! 1179 2013-06-14 05:57:58Z raasch
	32	! mean profiles for reference state are only calculated if required,
	33	! small bugfix for background communication
	34	!
[1172]	35	! 1171 2013-05-30 11:27:45Z raasch
	36	! split of prognostic_equations deactivated (comment lines), for the time being
	37	!
[1132]	38	! 1128 2013-04-12 06:19:32Z raasch
[1128]	39	! asynchronous transfer of ghost point data realized for acc-optimized version:
	40	! prognostic_equations are first called two times for those points required for
	41	! the left-right and north-south exchange, respectively, and then for the
	42	! remaining points,
	43	! those parts requiring global communication moved from prognostic_equations to
	44	! here
[392]	45	!
[1116]	46	! 1115 2013-03-26 18:16:16Z hoffmann
	47	! calculation of qr and nr is restricted to precipitation
	48	!
[1114]	49	! 1113 2013-03-10 02:48:14Z raasch
	50	! GPU-porting of boundary conditions,
	51	! openACC directives updated
	52	! formal parameter removed from routine boundary_conds
	53	!
[1112]	54	! 1111 2013-03-08 23:54:10Z raasch
	55	! +internal timestep counter for cpu statistics added,
	56	! openACC directives updated
	57	!
[1093]	58	! 1092 2013-02-02 11:24:22Z raasch
	59	! unused variables removed
	60	!
[1066]	61	! 1065 2012-11-22 17:42:36Z hoffmann
	62	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
	63	!
[1054]	64	! 1053 2012-11-13 17:11:03Z hoffmann
	65	! exchange of ghost points for nr, qr added
	66	!
[1037]	67	! 1036 2012-10-22 13:43:42Z raasch
	68	! code put under GPL (PALM 3.9)
	69	!
[1020]	70	! 1019 2012-09-28 06:46:45Z raasch
	71	! non-optimized version of prognostic_equations removed
	72	!
[1017]	73	! 1015 2012-09-27 09:23:24Z raasch
	74	! +call of prognostic_equations_acc
	75	!
[1002]	76	! 1001 2012-09-13 14:08:46Z raasch
	77	! all actions concerning leapfrog- and upstream-spline-scheme removed
	78	!
[850]	79	! 849 2012-03-15 10:35:09Z raasch
	80	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
	81	!
[826]	82	! 825 2012-02-19 03:03:44Z raasch
	83	! wang_collision_kernel renamed wang_kernel
	84	!
[791]	85	! 790 2011-11-29 03:11:20Z raasch
	86	! exchange of ghostpoints for array diss
	87	!
[708]	88	! 707 2011-03-29 11:39:40Z raasch
	89	! bc_lr/ns replaced by bc_lr/ns_cyc, calls of exchange_horiz are modified,
	90	! adaption to sloping surface
	91	!
[668]	92	! 667 2010-12-23 12:06:00Z suehring/gryschka
	93	! Calls of exchange_horiz are modified.
	94	! Adaption to slooping surface.
	95	!
[482]	96	! 449 2010-02-02 11:23:59Z raasch
	97	! Bugfix: exchange of ghost points for prho included
	98	!
[449]	99	! 410 2009-12-04 17:05:40Z letzel
	100	! masked data output
	101	!
[392]	102	! 388 2009-09-23 09:40:33Z raasch
[388]	103	! Using prho instead of rho in diffusvities.
[291]	104	! Coupling with independent precursor runs.
	105	! Bugfix: output of particle time series only if particle advection is switched
[253]	106	! on
[110]	107	!
[198]	108	! 151 2008-03-07 13:42:18Z raasch
	109	! inflow turbulence is imposed by calling new routine inflow_turbulence
	110	!
[110]	111	! 108 2007-08-24 15:10:38Z letzel
[106]	112	! Call of new routine surface_coupler,
	113	! presure solver is called after the first Runge-Kutta substep instead of the
	114	! last in case that call_psolver_at_all_substeps = .F.; for this case, the
	115	! random perturbation has to be added to the velocity fields also after the
	116	! first substep
[77]	117	!
[98]	118	! 97 2007-06-21 08:23:15Z raasch
	119	! diffusivities is called with argument rho in case of ocean runs,
	120	! new argument pt_/prho_reference in calls of diffusivities,
	121	! ghostpoint exchange for salinity and density
	122	!
[90]	123	! 87 2007-05-22 15:46:47Z raasch
	124	! var_hom renamed pr_palm
	125	!
[77]	126	! 75 2007-03-22 09:54:05Z raasch
[46]	127	! Move call of user_actions( 'after_integration' ) below increment of times
[63]	128	! and counters,
	129	! calls of prognostic_equations_.. changed to .._noopt, .._cache, and
[75]	130	! .._vector, these calls are now controlled by switch loop_optimization,
	131	! uxrp, vynp eliminated, 2nd+3rd argument removed from exchange horiz,
	132	! moisture renamed humidity
[1]	133	!
[3]	134	! RCS Log replace by Id keyword, revision history cleaned up
	135	!
[1]	136	! Revision 1.8 2006/08/22 14:16:05 raasch
	137	! Disturbances are imposed only for the last Runge-Kutta-substep
	138	!
	139	! Revision 1.2 2004/04/30 13:03:40 raasch
	140	! decalpha-specific warning removed, routine name changed to time_integration,
	141	! particle advection is carried out only once during the intermediate steps,
	142	! impulse_advec renamed momentum_advec
	143	!
	144	! Revision 1.1 1997/08/11 06:19:04 raasch
	145	! Initial revision
	146	!
	147	!
	148	! Description:
	149	! ------------
	150	! Integration in time of the model equations, statistical analysis and graphic
	151	! output
	152	!------------------------------------------------------------------------------!
	153
[1128]	154	USE advec_ws
[1]	155	USE arrays_3d
	156	USE averaging
[1128]	157	USE buoyancy_mod
[1]	158	USE control_parameters
	159	USE cpulog
	160	#if defined( __dvrp_graphics )
	161	USE DVRP
	162	#endif
	163	USE grid_variables
	164	USE indices
	165	USE interaction_droplets_ptq_mod
	166	USE interfaces
	167	USE particle_attributes
	168	USE pegrid
[1128]	169	USE production_e_mod
[1]	170	USE prognostic_equations_mod
	171	USE statistics
	172	USE user_actions_mod
	173
	174	IMPLICIT NONE
	175
	176	CHARACTER (LEN=9) :: time_to_string
	177
	178	!
	179	!-- At the beginning of a simulation determine the time step as well as
	180	!-- determine and print out the run control parameters
	181	IF ( simulated_time == 0.0 ) CALL timestep
[667]	182
[1]	183	CALL run_control
	184
[667]	185
[108]	186	!
	187	!-- Data exchange between coupled models in case that a call has been omitted
	188	!-- at the end of the previous run of a job chain.
[291]	189	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[108]	190	!
	191	!-- In case of model termination initiated by the local model the coupler
	192	!-- must not be called because this would again cause an MPI hang.
	193	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
	194	CALL surface_coupler
	195	time_coupling = time_coupling - dt_coupling
	196	ENDDO
[348]	197	IF (time_coupling == 0.0 .AND. time_since_reference_point < dt_coupling)&
	198	THEN
	199	time_coupling = time_since_reference_point
	200	ENDIF
[108]	201	ENDIF
	202
	203
[1]	204	#if defined( __dvrp_graphics )
	205	!
	206	!-- Time measurement with dvrp software
	207	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	208	#endif
	209
	210	!
	211	!-- Start of the time loop
	212	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
	213	.NOT. terminate_run )
	214
	215	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
[1221]	216
[1]	217	!
	218	!-- Determine size of next time step
[1221]	219	IF ( simulated_time /= 0.0 ) THEN
	220	!$acc update host( kh, km, u, v, w )
	221	CALL timestep
	222	ENDIF
	223
[1]	224	!
	225	!-- Execute the user-defined actions
	226	CALL user_actions( 'before_timestep' )
	227
	228	!
	229	!-- Start of intermediate step loop
	230	intermediate_timestep_count = 0
	231	DO WHILE ( intermediate_timestep_count < &
	232	intermediate_timestep_count_max )
	233
	234	intermediate_timestep_count = intermediate_timestep_count + 1
	235
	236	!
	237	!-- Set the steering factors for the prognostic equations which depend
	238	!-- on the timestep scheme
	239	CALL timestep_scheme_steering
	240
	241	!
[1128]	242	!-- Calculate those variables needed in the tendency terms which need
	243	!-- global communication
[1179]	244	IF ( .NOT. use_single_reference_value .AND. &
	245	.NOT. use_initial_profile_as_reference ) THEN
	246	!
	247	!-- Horizontally averaged profiles to be used as reference state in
	248	!-- buoyancy terms (WARNING: only the respective last call of
	249	!-- calc_mean_profile defines the reference state!)
	250	IF ( .NOT. neutral ) CALL calc_mean_profile( pt, 4 )
	251	IF ( ocean ) CALL calc_mean_profile( rho, 64 )
	252	IF ( humidity ) CALL calc_mean_profile( vpt, 44 )
	253	ENDIF
	254
[1128]	255	IF ( .NOT. constant_diffusion ) CALL production_e_init
	256	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
	257	intermediate_timestep_count == 1 ) CALL ws_statistics
	258
	259	!
[1]	260	!-- Solve the prognostic equations. A fast cache optimized version with
	261	!-- only one single loop is used in case of Piascek-Williams advection
	262	!-- scheme. NEC vector machines use a different version, because
	263	!-- in the other versions a good vectorization is prohibited due to
	264	!-- inlining problems.
[1019]	265	IF ( loop_optimization == 'cache' ) THEN
	266	CALL prognostic_equations_cache
	267	ELSEIF ( loop_optimization == 'vector' ) THEN
[63]	268	CALL prognostic_equations_vector
[1015]	269	ELSEIF ( loop_optimization == 'acc' ) THEN
[1171]	270	i_left = nxl; i_right = nxr
	271	j_south = nys; j_north = nyn
	272	CALL prognostic_equations_acc
	273
	274	! i_left = nxl; i_right = nxl+nbgp-1
[1128]	275	! j_south = nys; j_north = nyn
	276	! CALL prognostic_equations_acc
[1171]	277	! i_left = nxr-nbgp+1; i_right = nxr
	278	! j_south = nys; j_north = nyn
	279	! CALL prognostic_equations_acc
[1128]	280
	281	!
	282	!-- Exchange of ghost points (lateral boundary conditions)
	283	IF ( background_communication ) THEN
	284
	285	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
	286
	287	send_receive = 'lr'
	288	sendrecv_in_background = .TRUE.
	289	req = 0
	290	req_count = 0
	291
	292	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	293	on_device = .TRUE. ! to be removed after complete porting
	294	ELSE ! of ghost point exchange
	295	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	296	ENDIF
	297
	298	CALL exchange_horiz( u_p, nbgp )
	299	CALL exchange_horiz( v_p, nbgp )
	300	CALL exchange_horiz( w_p, nbgp )
	301	CALL exchange_horiz( pt_p, nbgp )
	302	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	303	IF ( ocean ) THEN
	304	CALL exchange_horiz( sa_p, nbgp )
	305	CALL exchange_horiz( rho, nbgp )
	306	CALL exchange_horiz( prho, nbgp )
	307	ENDIF
	308	IF (humidity .OR. passive_scalar) THEN
	309	CALL exchange_horiz( q_p, nbgp )
	310	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	311	CALL exchange_horiz( qr_p, nbgp )
	312	CALL exchange_horiz( nr_p, nbgp )
	313	ENDIF
	314	ENDIF
	315	IF ( cloud_droplets ) THEN
	316	CALL exchange_horiz( ql, nbgp )
	317	CALL exchange_horiz( ql_c, nbgp )
	318	CALL exchange_horiz( ql_v, nbgp )
	319	CALL exchange_horiz( ql_vp, nbgp )
	320	ENDIF
	321	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	322
	323	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	324	on_device = .FALSE. ! to be removed after complete porting
	325	ELSE ! of ghost point exchange
	326	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	327	ENDIF
	328
	329	sendrecv_in_background = .FALSE.
	330
	331	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
	332
	333	ENDIF
	334
[1171]	335	! i_left = nxl+nbgp; i_right = nxr-nbgp
	336	! j_south = nys; j_north = nys+nbgp-1
	337	! CALL prognostic_equations_acc
	338	! i_left = nxl+nbgp; i_right = nxr-nbgp
	339	! j_south = nyn-nbgp+1; j_north = nyn
	340	! CALL prognostic_equations_acc
[1128]	341
	342	IF ( background_communication ) THEN
	343	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
	344	#if defined( __parallel )
	345	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	346	#endif
	347	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
	348
	349	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
	350
	351	send_receive = 'ns'
	352	sendrecv_in_background = .TRUE.
	353	req = 0
	354	req_count = 0
	355
	356	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	357	on_device = .TRUE. ! to be removed after complete porting
	358	ELSE ! of ghost point exchange
	359	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	360	ENDIF
	361
	362	CALL exchange_horiz( u_p, nbgp )
	363	CALL exchange_horiz( v_p, nbgp )
	364	CALL exchange_horiz( w_p, nbgp )
	365	CALL exchange_horiz( pt_p, nbgp )
	366	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	367	IF ( ocean ) THEN
	368	CALL exchange_horiz( sa_p, nbgp )
	369	CALL exchange_horiz( rho, nbgp )
	370	CALL exchange_horiz( prho, nbgp )
	371	ENDIF
	372	IF (humidity .OR. passive_scalar) THEN
	373	CALL exchange_horiz( q_p, nbgp )
	374	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	375	CALL exchange_horiz( qr_p, nbgp )
	376	CALL exchange_horiz( nr_p, nbgp )
	377	ENDIF
	378	ENDIF
	379	IF ( cloud_droplets ) THEN
	380	CALL exchange_horiz( ql, nbgp )
	381	CALL exchange_horiz( ql_c, nbgp )
	382	CALL exchange_horiz( ql_v, nbgp )
	383	CALL exchange_horiz( ql_vp, nbgp )
	384	ENDIF
	385	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	386
	387	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	388	on_device = .FALSE. ! to be removed after complete porting
	389	ELSE ! of ghost point exchange
	390	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	391	ENDIF
	392
	393	sendrecv_in_background = .FALSE.
	394
	395	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	396
	397	ENDIF
	398
[1171]	399	! i_left = nxl+nbgp; i_right = nxr-nbgp
	400	! j_south = nys+nbgp; j_north = nyn-nbgp
	401	! CALL prognostic_equations_acc
[1128]	402
	403	IF ( background_communication ) THEN
	404	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
	405	#if defined( __parallel )
	406	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	407	#endif
	408	send_receive = 'al'
	409	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
	410	ENDIF
	411
[1]	412	ENDIF
	413
	414	!
[849]	415	!-- Particle transport/physics with the Lagrangian particle model
	416	!-- (only once during intermediate steps, because it uses an Euler-step)
[1128]	417	!-- ### particle model should be moved before prognostic_equations, in order
	418	!-- to regard droplet interactions directly
[63]	419	IF ( particle_advection .AND. &
	420	simulated_time >= particle_advection_start .AND. &
[1]	421	intermediate_timestep_count == 1 ) THEN
[849]	422	CALL lpm
	423	first_call_lpm = .FALSE.
[1]	424	ENDIF
	425
	426	!
	427	!-- Interaction of droplets with temperature and specific humidity.
	428	!-- Droplet condensation and evaporation is calculated within
	429	!-- advec_particles.
	430	IF ( cloud_droplets .AND. &
	431	intermediate_timestep_count == intermediate_timestep_count_max )&
	432	THEN
	433	CALL interaction_droplets_ptq
	434	ENDIF
	435
	436	!
	437	!-- Exchange of ghost points (lateral boundary conditions)
[1128]	438	IF ( .NOT. background_communication ) THEN
[1113]	439
[1128]	440	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
[1113]	441
[1128]	442	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	443	on_device = .TRUE. ! to be removed after complete porting
	444	ELSE ! of ghost point exchange
	445	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
[1053]	446	ENDIF
[1]	447
[1128]	448	CALL exchange_horiz( u_p, nbgp )
	449	CALL exchange_horiz( v_p, nbgp )
	450	CALL exchange_horiz( w_p, nbgp )
	451	CALL exchange_horiz( pt_p, nbgp )
	452	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	453	IF ( ocean ) THEN
	454	CALL exchange_horiz( sa_p, nbgp )
	455	CALL exchange_horiz( rho, nbgp )
	456	CALL exchange_horiz( prho, nbgp )
	457	ENDIF
	458	IF (humidity .OR. passive_scalar) THEN
	459	CALL exchange_horiz( q_p, nbgp )
[1179]	460	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
	461	precipitation ) THEN
[1128]	462	CALL exchange_horiz( qr_p, nbgp )
	463	CALL exchange_horiz( nr_p, nbgp )
	464	ENDIF
	465	ENDIF
	466	IF ( cloud_droplets ) THEN
	467	CALL exchange_horiz( ql, nbgp )
	468	CALL exchange_horiz( ql_c, nbgp )
	469	CALL exchange_horiz( ql_v, nbgp )
	470	CALL exchange_horiz( ql_vp, nbgp )
	471	ENDIF
	472	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	473
	474	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	475	on_device = .FALSE. ! to be removed after complete porting
	476	ELSE ! of ghost point exchange
	477	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	478	ENDIF
	479
	480	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	481
[1113]	482	ENDIF
	483
[1]	484	!
	485	!-- Boundary conditions for the prognostic quantities (except of the
	486	!-- velocities at the outflow in case of a non-cyclic lateral wall)
[1113]	487	CALL boundary_conds
[1]	488
	489	!
[73]	490	!-- Swap the time levels in preparation for the next time step.
	491	CALL swap_timelevel
	492
	493	!
[1]	494	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
	495	!-- when a sloping surface is used
	496	IF ( sloping_surface ) THEN
[707]	497	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
	498	pt_slope_offset
	499	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
	500	pt_slope_offset
[1]	501	ENDIF
	502
	503	!
[151]	504	!-- Impose a turbulent inflow using the recycling method
	505	IF ( turbulent_inflow ) CALL inflow_turbulence
	506
	507	!
[1]	508	!-- Impose a random perturbation on the horizontal velocity field
[106]	509	IF ( create_disturbances .AND. &
	510	( call_psolver_at_all_substeps .AND. &
[1]	511	intermediate_timestep_count == intermediate_timestep_count_max )&
[106]	512	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
	513	intermediate_timestep_count == 1 ) ) &
[1]	514	THEN
	515	time_disturb = time_disturb + dt_3d
	516	IF ( time_disturb >= dt_disturb ) THEN
[1111]	517	!$acc update host( u, v )
[1113]	518	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
[87]	519	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
[75]	520	CALL disturb_field( nzb_u_inner, tend, u )
	521	CALL disturb_field( nzb_v_inner, tend, v )
[707]	522	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
[1]	523	!
	524	!-- Runs with a non-cyclic lateral wall need perturbations
	525	!-- near the inflow throughout the whole simulation
	526	dist_range = 1
[75]	527	CALL disturb_field( nzb_u_inner, tend, u )
	528	CALL disturb_field( nzb_v_inner, tend, v )
[1]	529	dist_range = 0
	530	ENDIF
[1113]	531	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
[1111]	532	!$acc update device( u, v )
[1]	533	time_disturb = time_disturb - dt_disturb
	534	ENDIF
	535	ENDIF
	536
	537	!
	538	!-- Reduce the velocity divergence via the equation for perturbation
	539	!-- pressure.
[106]	540	IF ( intermediate_timestep_count == 1 .OR. &
	541	call_psolver_at_all_substeps ) THEN
[1]	542	CALL pres
	543	ENDIF
	544
	545	!
	546	!-- If required, compute liquid water content
[1015]	547	IF ( cloud_physics ) THEN
	548	CALL calc_liquid_water_content
	549	!$acc update device( ql )
	550	ENDIF
[1115]	551	!
	552	!-- If required, compute virtual potential temperature
	553	IF ( humidity ) THEN
	554	CALL compute_vpt
	555	!$acc update device( vpt )
	556	ENDIF
[1]	557	!
	558	!-- Compute the diffusion quantities
	559	IF ( .NOT. constant_diffusion ) THEN
	560
	561	!
	562	!-- First the vertical fluxes in the Prandtl layer are being computed
	563	IF ( prandtl_layer ) THEN
	564	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'start' )
	565	CALL prandtl_fluxes
	566	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'stop' )
	567	ENDIF
	568	!
	569	!-- Compute the diffusion coefficients
	570	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
[75]	571	IF ( .NOT. humidity ) THEN
[97]	572	IF ( ocean ) THEN
[388]	573	CALL diffusivities( prho, prho_reference )
[97]	574	ELSE
	575	CALL diffusivities( pt, pt_reference )
	576	ENDIF
[1]	577	ELSE
[97]	578	CALL diffusivities( vpt, pt_reference )
[1]	579	ENDIF
	580	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
	581
	582	ENDIF
	583
	584	ENDDO ! Intermediate step loop
	585
	586	!
	587	!-- Increase simulation time and output times
[1111]	588	nr_timesteps_this_run = nr_timesteps_this_run + 1
[291]	589	current_timestep_number = current_timestep_number + 1
	590	simulated_time = simulated_time + dt_3d
	591	simulated_time_chr = time_to_string( simulated_time )
	592	time_since_reference_point = simulated_time - coupling_start_time
	593
[1]	594	IF ( simulated_time >= skip_time_data_output_av ) THEN
	595	time_do_av = time_do_av + dt_3d
	596	ENDIF
	597	IF ( simulated_time >= skip_time_do2d_xy ) THEN
	598	time_do2d_xy = time_do2d_xy + dt_3d
	599	ENDIF
	600	IF ( simulated_time >= skip_time_do2d_xz ) THEN
	601	time_do2d_xz = time_do2d_xz + dt_3d
	602	ENDIF
	603	IF ( simulated_time >= skip_time_do2d_yz ) THEN
	604	time_do2d_yz = time_do2d_yz + dt_3d
	605	ENDIF
	606	IF ( simulated_time >= skip_time_do3d ) THEN
	607	time_do3d = time_do3d + dt_3d
	608	ENDIF
[410]	609	DO mid = 1, masks
	610	IF ( simulated_time >= skip_time_domask(mid) ) THEN
	611	time_domask(mid)= time_domask(mid) + dt_3d
	612	ENDIF
	613	ENDDO
[1]	614	time_dvrp = time_dvrp + dt_3d
	615	IF ( simulated_time >= skip_time_dosp ) THEN
	616	time_dosp = time_dosp + dt_3d
	617	ENDIF
	618	time_dots = time_dots + dt_3d
[849]	619	IF ( .NOT. first_call_lpm ) THEN
[1]	620	time_dopts = time_dopts + dt_3d
	621	ENDIF
	622	IF ( simulated_time >= skip_time_dopr ) THEN
	623	time_dopr = time_dopr + dt_3d
	624	ENDIF
	625	time_dopr_listing = time_dopr_listing + dt_3d
	626	time_run_control = time_run_control + dt_3d
	627
	628	!
[102]	629	!-- Data exchange between coupled models
[291]	630	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[102]	631	time_coupling = time_coupling + dt_3d
[343]	632
[108]	633	!
	634	!-- In case of model termination initiated by the local model
	635	!-- (terminate_coupled > 0), the coupler must be skipped because it would
	636	!-- cause an MPI intercomminucation hang.
	637	!-- If necessary, the coupler will be called at the beginning of the
	638	!-- next restart run.
	639	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
[102]	640	CALL surface_coupler
	641	time_coupling = time_coupling - dt_coupling
	642	ENDDO
	643	ENDIF
	644
	645	!
[46]	646	!-- Execute user-defined actions
	647	CALL user_actions( 'after_integration' )
	648
	649	!
[1]	650	!-- If Galilei transformation is used, determine the distance that the
	651	!-- model has moved so far
	652	IF ( galilei_transformation ) THEN
	653	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
	654	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
	655	ENDIF
	656
	657	!
	658	!-- Check, if restart is necessary (because cpu-time is expiring or
	659	!-- because it is forced by user) and set stop flag
[108]	660	!-- This call is skipped if the remote model has already initiated a restart.
	661	IF ( .NOT. terminate_run ) CALL check_for_restart
[1]	662
	663	!
	664	!-- Carry out statistical analysis and output at the requested output times.
	665	!-- The MOD function is used for calculating the output time counters (like
	666	!-- time_dopr) in order to regard a possible decrease of the output time
	667	!-- interval in case of restart runs
	668
	669	!
	670	!-- Set a flag indicating that so far no statistics have been created
	671	!-- for this time step
	672	flow_statistics_called = .FALSE.
	673
	674	!
	675	!-- If required, call flow_statistics for averaging in time
	676	IF ( averaging_interval_pr /= 0.0 .AND. &
	677	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
	678	simulated_time >= skip_time_dopr ) THEN
	679	time_dopr_av = time_dopr_av + dt_3d
	680	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
	681	do_sum = .TRUE.
	682	time_dopr_av = MOD( time_dopr_av, &
	683	MAX( dt_averaging_input_pr, dt_3d ) )
	684	ENDIF
	685	ENDIF
	686	IF ( do_sum ) CALL flow_statistics
	687
	688	!
[410]	689	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
[1]	690	IF ( averaging_interval /= 0.0 .AND. &
	691	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
	692	simulated_time >= skip_time_data_output_av ) &
	693	THEN
	694	time_do_sla = time_do_sla + dt_3d
	695	IF ( time_do_sla >= dt_averaging_input ) THEN
	696	CALL sum_up_3d_data
	697	average_count_3d = average_count_3d + 1
	698	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
	699	ENDIF
	700	ENDIF
	701
	702	!
	703	!-- Calculate spectra for time averaging
	704	IF ( averaging_interval_sp /= 0.0 .AND. &
	705	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
	706	simulated_time >= skip_time_dosp ) THEN
	707	time_dosp_av = time_dosp_av + dt_3d
	708	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
	709	CALL calc_spectra
	710	time_dosp_av = MOD( time_dosp_av, &
	711	MAX( dt_averaging_input_pr, dt_3d ) )
	712	ENDIF
	713	ENDIF
	714
	715	!
	716	!-- Computation and output of run control parameters.
[1001]	717	!-- This is also done whenever perturbations have been imposed
[1]	718	IF ( time_run_control >= dt_run_control .OR. &
[1001]	719	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
[1]	720	THEN
	721	CALL run_control
	722	IF ( time_run_control >= dt_run_control ) THEN
	723	time_run_control = MOD( time_run_control, &
	724	MAX( dt_run_control, dt_3d ) )
	725	ENDIF
	726	ENDIF
	727
	728	!
	729	!-- Profile output (ASCII) on file
	730	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
	731	CALL print_1d
	732	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
	733	dt_3d ) )
	734	ENDIF
	735
	736	!
	737	!-- Graphic output for PROFIL
	738	IF ( time_dopr >= dt_dopr ) THEN
	739	IF ( dopr_n /= 0 ) CALL data_output_profiles
	740	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
	741	time_dopr_av = 0.0 ! due to averaging (see above)
	742	ENDIF
	743
	744	!
	745	!-- Graphic output for time series
	746	IF ( time_dots >= dt_dots ) THEN
[48]	747	CALL data_output_tseries
[1]	748	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
	749	ENDIF
	750
	751	!
	752	!-- Output of spectra (formatted for use with PROFIL), in case of no
	753	!-- time averaging, spectra has to be calculated before
	754	IF ( time_dosp >= dt_dosp ) THEN
	755	IF ( average_count_sp == 0 ) CALL calc_spectra
	756	CALL data_output_spectra
	757	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
	758	ENDIF
	759
	760	!
	761	!-- 2d-data output (cross-sections)
	762	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
	763	CALL data_output_2d( 'xy', 0 )
	764	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
	765	ENDIF
	766	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
	767	CALL data_output_2d( 'xz', 0 )
	768	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
	769	ENDIF
	770	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
	771	CALL data_output_2d( 'yz', 0 )
	772	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
	773	ENDIF
	774
	775	!
	776	!-- 3d-data output (volume data)
	777	IF ( time_do3d >= dt_do3d ) THEN
	778	CALL data_output_3d( 0 )
	779	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
	780	ENDIF
	781
	782	!
[410]	783	!-- masked data output
	784	DO mid = 1, masks
	785	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
	786	CALL data_output_mask( 0 )
	787	time_domask(mid) = MOD( time_domask(mid), &
	788	MAX( dt_domask(mid), dt_3d ) )
	789	ENDIF
	790	ENDDO
	791
	792	!
	793	!-- Output of time-averaged 2d/3d/masked data
[1]	794	IF ( time_do_av >= dt_data_output_av ) THEN
	795	CALL average_3d_data
	796	CALL data_output_2d( 'xy', 1 )
	797	CALL data_output_2d( 'xz', 1 )
	798	CALL data_output_2d( 'yz', 1 )
	799	CALL data_output_3d( 1 )
[410]	800	DO mid = 1, masks
	801	CALL data_output_mask( 1 )
	802	ENDDO
[1]	803	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
	804	ENDIF
	805
	806	!
	807	!-- Output of particle time series
[253]	808	IF ( particle_advection ) THEN
	809	IF ( time_dopts >= dt_dopts .OR. &
	810	( simulated_time >= particle_advection_start .AND. &
[849]	811	first_call_lpm ) ) THEN
[253]	812	CALL data_output_ptseries
	813	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
	814	ENDIF
[1]	815	ENDIF
	816
	817	!
	818	!-- Output of dvrp-graphics (isosurface, particles, slicer)
	819	#if defined( __dvrp_graphics )
	820	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
	821	#endif
	822	IF ( time_dvrp >= dt_dvrp ) THEN
	823	CALL data_output_dvrp
	824	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
	825	ENDIF
	826	#if defined( __dvrp_graphics )
	827	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	828	#endif
	829
	830	!
	831	!-- If required, set the heat flux for the next time step at a random value
	832	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
	833
	834	!
	835	!-- Execute user-defined actions
	836	CALL user_actions( 'after_timestep' )
	837
	838	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
	839
[667]	840
[1]	841	ENDDO ! time loop
	842
	843	#if defined( __dvrp_graphics )
	844	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
	845	#endif
	846
	847	END SUBROUTINE time_integration

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