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source: palm/trunk/SOURCE/time_integration_spinup.f90 @ 2750

Last change on this file since 2750 was 2728, checked in by maronga, 7 years ago
adjustments in spinup mechanism
Property svn:keywords set to `Id`
File size: 19.5 KB

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1	!> @file time_integration_spinup.f90
2	!------------------------------------------------------------------------------!
3	! This file is part of the PALM model system.
4	!
5	! PALM is free software: you can redistribute it and/or modify it under the
6	! terms of the GNU General Public License as published by the Free Software
7	! Foundation, either version 3 of the License, or (at your option) any later
8	! 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 1997-2018 Leibniz Universitaet Hannover
18	!------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! ------------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: time_integration_spinup.f90 2728 2018-01-09 07:03:53Z knoop $
27	! Set velocity componenets to homogeneous values during spinup
28	!
29	! 2724 2018-01-05 12:12:38Z maronga
30	! Use dt_spinup for all active components during spinup
31	!
32	! 2723 2018-01-05 09:27:03Z maronga
33	! Bugfix: array rad_sw_in no longer exists and is thus removed from RUN_CONTROL
34	! output.
35	! Added output of XY and 3D data during spinup.
36	! Bugfix: time step in LSM and USM was set to dt_3d instead of dt_spinup
37	!
38	! 2718 2018-01-02 08:49:38Z maronga
39	! Corrected "Former revisions" section
40	!
41	! 2696 2017-12-14 17:12:51Z kanani
42	! Change in file header (GPL part)
43	! Added radiation interactions (moved from USM) (MS)
44	!
45	! 2544 2017-10-13 18:09:32Z maronga
46	! Date and time quantities are now read from date_and_time_mod
47	!
48	! 2299 2017-06-29 10:14:38Z maronga
49	! Call of soil model adjusted to avoid prognostic equation for soil moisture
50	! during spinup.
51	! Better representation of diurnal cycle of near-surface temperature.
52	! Excluded prognostic equation for soil moisture during spinup.
53	! Added output of run control data for spinup.
54	!
55	! 2297 2017-06-28 14:35:57Z scharf
56	! bugfixes
57	!
58	! 2296 2017-06-28 07:53:56Z maronga
59	! Initial revision
60	!
61	!
62	! Description:
63	! ------------
64	!> Integration in time of the non-atmospheric model components such as land
65	!> surface model and urban surface model
66	!------------------------------------------------------------------------------!
67	SUBROUTINE time_integration_spinup
68
69	USE arrays_3d, &
70	ONLY: pt, pt_p, u, v
71
72	USE control_parameters, &
73	ONLY: averaging_interval_pr, constant_diffusion, constant_flux_layer, &
74	coupling_start_time, current_timestep_number, &
75	data_output_during_spinup, disturbance_created, dopr_n, do_sum, &
76	dt_averaging_input_pr, dt_dopr, dt_dots, dt_do2d_xy, dt_do3d, &
77	dt_run_control, dt_spinup, dt_3d, humidity, &
78	intermediate_timestep_count, &
79	intermediate_timestep_count_max, land_surface, &
80	simulated_time, simulated_time_chr, &
81	skip_time_dopr, skip_time_do2d_xy, skip_time_do3d, spinup, &
82	spinup_pt_amplitude, spinup_pt_mean, spinup_time, &
83	timestep_count, timestep_scheme, time_dopr, time_dopr_av, &
84	time_dots, time_do2d_xy, time_do3d, time_run_control, &
85	time_since_reference_point, ug_surface, vg_surface, urban_surface
86
87	USE constants, &
88	ONLY: pi
89
90	USE cpulog, &
91	ONLY: cpu_log, log_point, log_point_s
92
93	USE date_and_time_mod, &
94	ONLY: day_of_year_init, time_utc_init
95
96	USE indices, &
97	ONLY: nbgp, nzb, nzt, nysg, nyng, nxlg, nxrg
98
99
100	USE land_surface_model_mod, &
101	ONLY: lsm_energy_balance, lsm_soil_model, lsm_swap_timelevel
102
103	USE pegrid, &
104	ONLY: myid
105
106	USE kinds
107
108	USE radiation_model_mod, &
109	ONLY: force_radiation_call, radiation, &
110	radiation_control, rad_sw_in, time_radiation, &
111	radiation_interaction, radiation_interactions
112
113	USE statistics, &
114	ONLY: flow_statistics_called
115
116	USE surface_layer_fluxes_mod, &
117	ONLY: surface_layer_fluxes
118
119	USE surface_mod, &
120	ONLY : surf_def_h, surf_def_v, surf_lsm_h, surf_lsm_v, surf_usm_h, &
121	surf_usm_v
122
123	USE urban_surface_mod, &
124	ONLY: usm_material_heat_model, usm_material_model, &
125	usm_surface_energy_balance, usm_swap_timelevel, &
126	usm_green_heat_model, usm_temperature_near_surface
127
128
129
130
131	IMPLICIT NONE
132
133	CHARACTER (LEN=9) :: time_to_string !<
134
135	INTEGER(iwp) :: i !< running index
136	INTEGER(iwp) :: j !< running index
137	INTEGER(iwp) :: k !< running index
138	INTEGER(iwp) :: l !< running index
139	INTEGER(iwp) :: m !< running index
140
141	INTEGER(iwp) :: current_timestep_number_spinup = 0 !< number if timestep during spinup
142
143	LOGICAL :: run_control_header_spinup = .FALSE. !< flag parameter for steering whether the header information must be output
144
145	REAL(wp) :: pt_spinup !< temporary storage of temperature
146	REAL(wp) :: dt_save !< temporary storage for time step
147
148	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: pt_save !< temporary storage of temperature
149	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: u_save !< temporary storage of u wind component
150	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: v_save !< temporary storage of v wind component
151
152
153	!
154	!-- Save 3D arrays because they are to be changed for spinup purpose
155	ALLOCATE( pt_save(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
156	ALLOCATE( u_save(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
157	ALLOCATE( v_save(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
158
159	CALL exchange_horiz( pt, nbgp )
160	CALL exchange_horiz( u, nbgp )
161	CALL exchange_horiz( v, nbgp )
162
163	pt_save = pt
164	u_save = u
165	v_save = v
166
167	!
168	!-- Set the same wall-adjacent velocity to all grid points. The sign of the
169	!-- original velocity field must be preserved because the surface schemes crash
170	!-- otherwise. The precise reason is still unknown. A minimum velocity of 0.1
171	!-- m/s is used to maintain turbulent transfer at the surface.
172	u = SIGN(1.0_wp,u) * MAX(ug_surface,0.1_wp)
173	v = SIGN(1.0_wp,v) * MAX(vg_surface,0.1_wp)
174
175	dt_save = dt_3d
176	dt_3d = dt_spinup
177
178	CALL location_message( 'starting spinup-sequence', .TRUE. )
179	!
180	!-- Start of the time loop
181	DO WHILE ( simulated_time < spinup_time )
182
183	CALL cpu_log( log_point_s(15), 'timesteps spinup', 'start' )
184
185	!
186	!-- Start of intermediate step loop
187	intermediate_timestep_count = 0
188	DO WHILE ( intermediate_timestep_count < &
189	intermediate_timestep_count_max )
190
191	intermediate_timestep_count = intermediate_timestep_count + 1
192
193	!
194	!-- Set the steering factors for the prognostic equations which depend
195	!-- on the timestep scheme
196	CALL timestep_scheme_steering
197
198
199	!
200	!-- Estimate a near-surface air temperature based on the position of the
201	!-- sun and user input about mean temperature and amplitude. The time is
202	!-- shifted by one hour to simulate a lag between air temperature and
203	!-- incoming radiation
204	pt_spinup = spinup_pt_mean + spinup_pt_amplitude &
205	* solar_angle (time_utc_init + time_since_reference_point - 3600.0)
206
207	!
208	!-- Map air temperature to all grid points in the vicinity of a surface
209	!-- element
210	IF ( land_surface ) THEN
211	DO m = 1, surf_lsm_h%ns
212	i = surf_lsm_h%i(m)
213	j = surf_lsm_h%j(m)
214	k = surf_lsm_h%k(m)
215	pt(k,j,i) = pt_spinup
216	ENDDO
217
218	DO l = 0, 3
219	DO m = 1, surf_lsm_v(l)%ns
220	i = surf_lsm_v(l)%i(m)
221	j = surf_lsm_v(l)%j(m)
222	k = surf_lsm_v(l)%k(m)
223	pt(k,j,i) = pt_spinup
224	ENDDO
225	ENDDO
226	ENDIF
227
228	IF ( urban_surface ) THEN
229	DO m = 1, surf_usm_h%ns
230	i = surf_usm_h%i(m)
231	j = surf_usm_h%j(m)
232	k = surf_usm_h%k(m)
233	pt(k,j,i) = pt_spinup
234	ENDDO
235
236	DO l = 0, 3
237	DO m = 1, surf_usm_v(l)%ns
238	i = surf_usm_v(l)%i(m)
239	j = surf_usm_v(l)%j(m)
240	k = surf_usm_v(l)%k(m)
241	pt(k,j,i) = pt_spinup
242	ENDDO
243	ENDDO
244	ENDIF
245
246	!
247	!-- Swap the time levels in preparation for the next time step.
248	timestep_count = timestep_count + 1
249
250	IF ( land_surface ) THEN
251	CALL lsm_swap_timelevel ( 0 )
252	ENDIF
253
254	IF ( urban_surface ) THEN
255	CALL usm_swap_timelevel ( 0 )
256	ENDIF
257
258	IF ( land_surface ) THEN
259	CALL lsm_swap_timelevel ( MOD( timestep_count, 2) )
260	ENDIF
261
262	IF ( urban_surface ) THEN
263	CALL usm_swap_timelevel ( MOD( timestep_count, 2) )
264	ENDIF
265
266	!
267	!-- If required, compute virtual potential temperature
268	IF ( humidity ) THEN
269	CALL compute_vpt
270	ENDIF
271
272	!
273	!-- Compute the diffusion quantities
274	IF ( .NOT. constant_diffusion ) THEN
275
276	!
277	!-- First the vertical (and horizontal) fluxes in the surface
278	!-- (constant flux) layer are computed
279	IF ( constant_flux_layer ) THEN
280	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
281	CALL surface_layer_fluxes
282	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
283	ENDIF
284
285	!
286	!-- If required, solve the energy balance for the surface and run soil
287	!-- model. Call for horizontal as well as vertical surfaces.
288	!-- The prognostic equation for soil moisure is switched off
289	IF ( land_surface ) THEN
290
291	CALL cpu_log( log_point(54), 'land_surface', 'start' )
292	!
293	!-- Call for horizontal upward-facing surfaces
294	CALL lsm_energy_balance( .TRUE., -1 )
295	CALL lsm_soil_model( .TRUE., -1, .FALSE. )
296	!
297	!-- Call for northward-facing surfaces
298	CALL lsm_energy_balance( .FALSE., 0 )
299	CALL lsm_soil_model( .FALSE., 0, .FALSE. )
300	!
301	!-- Call for southward-facing surfaces
302	CALL lsm_energy_balance( .FALSE., 1 )
303	CALL lsm_soil_model( .FALSE., 1, .FALSE. )
304	!
305	!-- Call for eastward-facing surfaces
306	CALL lsm_energy_balance( .FALSE., 2 )
307	CALL lsm_soil_model( .FALSE., 2, .FALSE. )
308	!
309	!-- Call for westward-facing surfaces
310	CALL lsm_energy_balance( .FALSE., 3 )
311	CALL lsm_soil_model( .FALSE., 3, .FALSE. )
312
313	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
314	ENDIF
315
316	!
317	!-- If required, solve the energy balance for urban surfaces and run
318	!-- the material heat model
319	IF (urban_surface) THEN
320	CALL cpu_log( log_point(74), 'urban_surface', 'start' )
321	CALL usm_surface_energy_balance
322	IF ( usm_material_model ) THEN
323	CALL usm_green_heat_model
324	CALL usm_material_heat_model
325	ENDIF
326	IF ( urban_surface ) THEN
327	CALL usm_temperature_near_surface
328	ENDIF
329	CALL cpu_log( log_point(74), 'urban_surface', 'stop' )
330	ENDIF
331
332	ENDIF
333
334	!
335	!-- If required, calculate radiative fluxes and heating rates
336	IF ( radiation .AND. intermediate_timestep_count &
337	== intermediate_timestep_count_max ) THEN
338
339	time_radiation = time_radiation + dt_3d
340
341	IF ( time_radiation >= dt_3d .OR. force_radiation_call ) &
342	THEN
343
344	CALL cpu_log( log_point(50), 'radiation', 'start' )
345
346	IF ( .NOT. force_radiation_call ) THEN
347	time_radiation = time_radiation - dt_3d
348	ENDIF
349
350	CALL radiation_control
351
352	CALL cpu_log( log_point(50), 'radiation', 'stop' )
353
354	IF ( radiation_interactions ) THEN
355	CALL cpu_log( log_point(75), 'radiation_interaction', 'start' )
356	CALL radiation_interaction
357	CALL cpu_log( log_point(75), 'radiation_interaction', 'stop' )
358	ENDIF
359	ENDIF
360	ENDIF
361
362	ENDDO ! Intermediate step loop
363
364	!
365	!-- Increase simulation time and output times
366	current_timestep_number_spinup = current_timestep_number_spinup + 1
367	simulated_time = simulated_time + dt_3d
368	simulated_time_chr = time_to_string( simulated_time )
369	time_since_reference_point = simulated_time - coupling_start_time
370
371	IF ( data_output_during_spinup ) THEN
372	IF ( simulated_time >= skip_time_do2d_xy ) THEN
373	time_do2d_xy = time_do2d_xy + dt_3d
374	ENDIF
375	IF ( simulated_time >= skip_time_do3d ) THEN
376	time_do3d = time_do3d + dt_3d
377	ENDIF
378	time_dots = time_dots + dt_3d
379	IF ( simulated_time >= skip_time_dopr ) THEN
380	time_dopr = time_dopr + dt_3d
381	ENDIF
382	time_run_control = time_run_control + dt_3d
383
384	!
385	!-- Carry out statistical analysis and output at the requested output times.
386	!-- The MOD function is used for calculating the output time counters (like
387	!-- time_dopr) in order to regard a possible decrease of the output time
388	!-- interval in case of restart runs
389
390	!
391	!-- Set a flag indicating that so far no statistics have been created
392	!-- for this time step
393	flow_statistics_called = .FALSE.
394
395	!
396	!-- If required, call flow_statistics for averaging in time
397	IF ( averaging_interval_pr /= 0.0_wp .AND. &
398	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
399	simulated_time >= skip_time_dopr ) THEN
400	time_dopr_av = time_dopr_av + dt_3d
401	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
402	do_sum = .TRUE.
403	time_dopr_av = MOD( time_dopr_av, &
404	MAX( dt_averaging_input_pr, dt_3d ) )
405	ENDIF
406	ENDIF
407	IF ( do_sum ) CALL flow_statistics
408
409	!
410	!-- Output of profiles
411	IF ( time_dopr >= dt_dopr ) THEN
412	IF ( dopr_n /= 0 ) CALL data_output_profiles
413	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
414	time_dopr_av = 0.0_wp ! due to averaging (see above)
415	ENDIF
416
417	!
418	!-- Output of time series
419	IF ( time_dots >= dt_dots ) THEN
420	CALL data_output_tseries
421	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
422	ENDIF
423
424	!
425	!-- 2d-data output (cross-sections)
426	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
427	CALL data_output_2d( 'xy', 0 )
428	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
429	ENDIF
430
431	!
432	!-- 3d-data output (volume data)
433	IF ( time_do3d >= dt_do3d ) THEN
434	CALL data_output_3d( 0 )
435	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
436	ENDIF
437
438
439	ENDIF
440
441	!
442	!-- Computation and output of run control parameters.
443	!-- This is also done whenever perturbations have been imposed
444	! IF ( time_run_control >= dt_run_control .OR. &
445	! timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
446	! THEN
447	! CALL run_control
448	! IF ( time_run_control >= dt_run_control ) THEN
449	! time_run_control = MOD( time_run_control, &
450	! MAX( dt_run_control, dt_3d ) )
451	! ENDIF
452	! ENDIF
453
454	CALL cpu_log( log_point_s(15), 'timesteps spinup', 'stop' )
455
456
457	!
458	!-- Run control output
459	IF ( myid == 0 ) THEN
460	!
461	!-- If necessary, write header
462	IF ( .NOT. run_control_header_spinup ) THEN
463	CALL check_open( 15 )
464	WRITE ( 15, 100 )
465	run_control_header_spinup = .TRUE.
466	ENDIF
467	!
468	!-- Write some general information about the spinup in run control file
469	WRITE ( 15, 101 ) current_timestep_number_spinup, simulated_time_chr, dt_3d, pt_spinup
470	!
471	!-- Write buffer contents to disc immediately
472	FLUSH( 15 )
473	ENDIF
474
475
476
477	ENDDO ! time loop
478
479	!
480	!-- Write back saved arrays to the 3D arrays
481	pt = pt_save
482	pt_p = pt_save
483	u = u_save
484	v = v_save
485
486	!
487	!-- Reset time step
488	dt_3d = dt_save
489
490	DEALLOCATE(pt_save)
491	DEALLOCATE(u_save)
492	DEALLOCATE(v_save)
493
494	CALL location_message( 'finished spinup-sequence', .TRUE. )
495
496
497	!
498	!-- Formats
499	100 FORMAT (///'Spinup control output:'/ &
500	'--------------------------------'// &
501	'ITER. HH:MM:SS DT PT(z_MO)'/ &
502	'--------------------------------')
503	101 FORMAT (I5,2X,A9,1X,F6.2,3X,F6.2,2X,F6.2)
504
505	CONTAINS
506
507	!
508	!-- Returns the cosine of the solar zenith angle at a given time. This routine
509	!-- is similar to that for calculation zenith (see radiation_model_mod.f90)
510	FUNCTION solar_angle( local_time )
511
512	USE constants, &
513	ONLY: pi
514
515	USE kinds
516
517	USE radiation_model_mod, &
518	ONLY: decl_1, decl_2, decl_3, lat, lon
519
520	IMPLICIT NONE
521
522
523	REAL(wp) :: solar_angle !< cosine of the solar zenith angle
524
525	REAL(wp) :: day !< day of the year
526	REAL(wp) :: declination !< solar declination angle
527	REAL(wp) :: hour_angle !< solar hour angle
528	REAL(wp) :: time_utc !< current time in UTC
529	REAL(wp), INTENT(IN) :: local_time
530	!
531	!-- Calculate current day and time based on the initial values and simulation
532	!-- time
533
534	day = day_of_year_init + INT(FLOOR( local_time / 86400.0_wp ), KIND=iwp)
535	time_utc = MOD(local_time, 86400.0_wp)
536
537
538	!
539	!-- Calculate solar declination and hour angle
540	declination = ASIN( decl_1 * SIN(decl_2 * REAL(day, KIND=wp) - decl_3) )
541	hour_angle = 2.0_wp * pi * (time_utc / 86400.0_wp) + lon - pi
542
543	!
544	!-- Calculate cosine of solar zenith angle
545	solar_angle = SIN(lat) * SIN(declination) + COS(lat) * COS(declination) &
546	* COS(hour_angle)
547
548
549	END FUNCTION solar_angle
550
551
552	END SUBROUTINE time_integration_spinup

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