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source: palm/trunk/SOURCE/time_integration.f90 @ 1202

Last change on this file since 1202 was 1182, checked in by raasch, 11 years ago
last commit documented, rc-file for example run updated
Property svn:keywords set to `Id`
File size: 31.1 KB

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

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