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source: palm/trunk/SOURCE/surface_coupler.f90 @ 3254

Last change on this file since 3254 was 3049, checked in by Giersch, 6 years ago
Revision history corrected
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1	!> @file surface_coupler.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: surface_coupler.f90 3049 2018-05-29 13:52:36Z suehring $
27	! Error messages revised
28	!
29	! 3045 2018-05-28 07:55:41Z Giersch
30	! Error message revised
31	!
32	! 2718 2018-01-02 08:49:38Z maronga
33	! Corrected "Former revisions" section
34	!
35	! 2696 2017-12-14 17:12:51Z kanani
36	! Change in file header (GPL part)
37	!
38	! 2233 2017-05-30 18:08:54Z suehring
39	!
40	! 2232 2017-05-30 17:47:52Z suehring
41	! Adjust to new surface structure. Transfer 1D surface fluxes onto 2D grid
42	! (and back).
43	!
44	! 2031 2016-10-21 15:11:58Z knoop
45	! renamed variable rho to rho_ocean
46	!
47	! 2000 2016-08-20 18:09:15Z knoop
48	! Forced header and separation lines into 80 columns
49	!
50	! 1682 2015-10-07 23:56:08Z knoop
51	! Code annotations made doxygen readable
52	!
53	! 1427 2014-07-07 14:04:59Z maronga
54	! Bugfix: value of l_v corrected.
55	!
56	! 1418 2014-06-06 13:05:08Z fricke
57	! Bugfix: For caluclation of the salinity flux at the sea surface,
58	! the given value for salinity must be in percent and not in psu
59	!
60	! 1353 2014-04-08 15:21:23Z heinze
61	! REAL constants provided with KIND-attribute
62	!
63	! 1324 2014-03-21 09:13:16Z suehring
64	! Bugfix: ONLY statement for module pegrid removed
65	!
66	! 1322 2014-03-20 16:38:49Z raasch
67	! REAL constants defined as wp-kind
68	!
69	! 1320 2014-03-20 08:40:49Z raasch
70	! ONLY-attribute added to USE-statements,
71	! kind-parameters added to all INTEGER and REAL declaration statements,
72	! kinds are defined in new module kinds,
73	! old module precision_kind is removed,
74	! revision history before 2012 removed,
75	! comment fields (!:) to be used for variable explanations added to
76	! all variable declaration statements
77	!
78	! 1318 2014-03-17 13:35:16Z raasch
79	! module interfaces removed
80	!
81	! 1092 2013-02-02 11:24:22Z raasch
82	! unused variables removed
83	!
84	! 1036 2012-10-22 13:43:42Z raasch
85	! code put under GPL (PALM 3.9)
86	!
87	! 880 2012-04-13 06:28:59Z raasch
88	! Bugfix: preprocessor statements for parallel execution added
89	!
90	! 109 2007-08-28 15:26:47Z letzel
91	! Initial revision
92	!
93	! Description:
94	! ------------
95	!> Data exchange at the interface between coupled models
96	!------------------------------------------------------------------------------!
97	SUBROUTINE surface_coupler
98
99
100	USE arrays_3d, &
101	ONLY: pt, rho_ocean, sa, total_2d_a, total_2d_o, u, v
102
103	USE cloud_parameters, &
104	ONLY: cp, l_v
105
106	USE control_parameters, &
107	ONLY: coupling_mode, coupling_mode_remote, coupling_topology, &
108	humidity, humidity_remote, land_surface, message_string, &
109	terminate_coupled, terminate_coupled_remote, &
110	time_since_reference_point, urban_surface
111
112	USE cpulog, &
113	ONLY: cpu_log, log_point
114
115	USE indices, &
116	ONLY: nbgp, nx, nxl, nxlg, nxr, nxrg, nx_a, nx_o, ny, nyn, nyng, nys, &
117	nysg, ny_a, ny_o, nzt
118
119	USE kinds
120
121	USE pegrid
122
123	USE surface_mod, &
124	ONLY : surf_def_h, surf_lsm_h, surf_type, surf_usm_h
125
126	IMPLICIT NONE
127
128	INTEGER(iwp) :: i !< index variable x-direction
129	INTEGER(iwp) :: j !< index variable y-direction
130	INTEGER(iwp) :: m !< running index for surface elements
131
132	REAL(wp) :: cpw = 4218.0_wp !< heat capacity of water at constant pressure
133	REAL(wp) :: time_since_reference_point_rem !<
134	REAL(wp) :: total_2d(-nbgp:ny+nbgp,-nbgp:nx+nbgp) !<
135
136	REAL(wp), DIMENSION(nysg:nyng,nxlg:nxrg) :: surface_flux !< dummy array for surface fluxes on 2D grid
137
138
139	#if defined( __parallel )
140
141	CALL cpu_log( log_point(39), 'surface_coupler', 'start' )
142
143
144
145	!
146	!-- In case of model termination initiated by the remote model
147	!-- (terminate_coupled_remote > 0), initiate termination of the local model.
148	!-- The rest of the coupler must then be skipped because it would cause an MPI
149	!-- intercomminucation hang.
150	!-- If necessary, the coupler will be called at the beginning of the next
151	!-- restart run.
152
153	IF ( coupling_topology == 0 ) THEN
154	CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, target_id, &
155	0, &
156	terminate_coupled_remote, 1, MPI_INTEGER, target_id, &
157	0, comm_inter, status, ierr )
158	ELSE
159	IF ( myid == 0) THEN
160	CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, &
161	target_id, 0, &
162	terminate_coupled_remote, 1, MPI_INTEGER, &
163	target_id, 0, &
164	comm_inter, status, ierr )
165	ENDIF
166	CALL MPI_BCAST( terminate_coupled_remote, 1, MPI_INTEGER, 0, comm2d, &
167	ierr )
168
169	ALLOCATE( total_2d_a(-nbgp:ny_a+nbgp,-nbgp:nx_a+nbgp), &
170	total_2d_o(-nbgp:ny_o+nbgp,-nbgp:nx_o+nbgp) )
171
172	ENDIF
173
174	IF ( terminate_coupled_remote > 0 ) THEN
175	WRITE( message_string, * ) 'remote model "', &
176	TRIM( coupling_mode_remote ), &
177	'" terminated', &
178	'&with terminate_coupled_remote = ', &
179	terminate_coupled_remote, &
180	'&local model "', TRIM( coupling_mode ), &
181	'" has', &
182	'&terminate_coupled = ', &
183	terminate_coupled
184	CALL message( 'surface_coupler', 'PA0310', 1, 2, 0, 6, 0 )
185	RETURN
186	ENDIF
187
188
189	!
190	!-- Exchange the current simulated time between the models,
191	!-- currently just for total_2d
192	IF ( coupling_topology == 0 ) THEN
193
194	CALL MPI_SEND( time_since_reference_point, 1, MPI_REAL, target_id, 11, &
195	comm_inter, ierr )
196	CALL MPI_RECV( time_since_reference_point_rem, 1, MPI_REAL, target_id, &
197	11, comm_inter, status, ierr )
198	ELSE
199
200	IF ( myid == 0 ) THEN
201
202	CALL MPI_SEND( time_since_reference_point, 1, MPI_REAL, target_id, &
203	11, comm_inter, ierr )
204	CALL MPI_RECV( time_since_reference_point_rem, 1, MPI_REAL, &
205	target_id, 11, comm_inter, status, ierr )
206
207	ENDIF
208
209	CALL MPI_BCAST( time_since_reference_point_rem, 1, MPI_REAL, 0, comm2d, &
210	ierr )
211
212	ENDIF
213
214	!
215	!-- Exchange the interface data
216	IF ( coupling_mode == 'atmosphere_to_ocean' ) THEN
217
218	!
219	!-- Horizontal grid size and number of processors is equal in ocean and
220	!-- atmosphere
221	IF ( coupling_topology == 0 ) THEN
222
223	!
224	!-- Send heat flux at bottom surface to the ocean. First, transfer from
225	!-- 1D surface type to 2D grid.
226	CALL transfer_1D_to_2D_equal( surf_def_h(0)%shf, surf_lsm_h%shf, &
227	surf_usm_h%shf )
228	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
229	12, comm_inter, ierr )
230	!
231	!-- Send humidity flux at bottom surface to the ocean. First, transfer
232	!-- from 1D surface type to 2D grid.
233	CALL transfer_1D_to_2D_equal( surf_def_h(0)%qsws, surf_lsm_h%qsws, &
234	surf_usm_h%qsws )
235	IF ( humidity ) THEN
236	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, &
237	target_id, 13, comm_inter, ierr )
238	ENDIF
239	!
240	!-- Receive temperature at the bottom surface from the ocean
241	CALL MPI_RECV( pt(0,nysg,nxlg), 1, type_xy, target_id, 14, &
242	comm_inter, status, ierr )
243	!
244	!-- Send the momentum flux (u) at bottom surface to the ocean. First,
245	!-- transfer from 1D surface type to 2D grid.
246	CALL transfer_1D_to_2D_equal( surf_def_h(0)%usws, surf_lsm_h%usws, &
247	surf_usm_h%usws )
248	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
249	15, comm_inter, ierr )
250	!
251	!-- Send the momentum flux (v) at bottom surface to the ocean. First,
252	!-- transfer from 1D surface type to 2D grid.
253	CALL transfer_1D_to_2D_equal( surf_def_h(0)%vsws, surf_lsm_h%vsws, &
254	surf_usm_h%vsws )
255	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
256	16, comm_inter, ierr )
257	!
258	!-- Receive u at the bottom surface from the ocean
259	CALL MPI_RECV( u(0,nysg,nxlg), 1, type_xy, target_id, 17, &
260	comm_inter, status, ierr )
261	!
262	!-- Receive v at the bottom surface from the ocean
263	CALL MPI_RECV( v(0,nysg,nxlg), 1, type_xy, target_id, 18, &
264	comm_inter, status, ierr )
265	!
266	!-- Horizontal grid size or number of processors differs between
267	!-- ocean and atmosphere
268	ELSE
269
270	!
271	!-- Send heat flux at bottom surface to the ocean
272	total_2d_a = 0.0_wp
273	total_2d = 0.0_wp
274	!
275	!-- Transfer from 1D surface type to 2D grid.
276	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%shf, surf_lsm_h%shf, &
277	surf_usm_h%shf )
278
279	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
280	comm2d, ierr )
281	CALL interpolate_to_ocean( 12 )
282	!
283	!-- Send humidity flux at bottom surface to the ocean
284	IF ( humidity ) THEN
285	total_2d_a = 0.0_wp
286	total_2d = 0.0_wp
287	!
288	!-- Transfer from 1D surface type to 2D grid.
289	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%qsws, &
290	surf_lsm_h%qsws, &
291	surf_usm_h%qsws )
292
293	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, &
294	0, comm2d, ierr )
295	CALL interpolate_to_ocean( 13 )
296	ENDIF
297	!
298	!-- Receive temperature at the bottom surface from the ocean
299	IF ( myid == 0 ) THEN
300	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
301	target_id, 14, comm_inter, status, ierr )
302	ENDIF
303	CALL MPI_BARRIER( comm2d, ierr )
304	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
305	ierr )
306	pt(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
307	!
308	!-- Send momentum flux (u) at bottom surface to the ocean
309	total_2d_a = 0.0_wp
310	total_2d = 0.0_wp
311	!
312	!-- Transfer from 1D surface type to 2D grid.
313	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%usws, surf_lsm_h%usws, &
314	surf_usm_h%usws )
315	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
316	comm2d, ierr )
317	CALL interpolate_to_ocean( 15 )
318	!
319	!-- Send momentum flux (v) at bottom surface to the ocean
320	total_2d_a = 0.0_wp
321	total_2d = 0.0_wp
322	!
323	!-- Transfer from 1D surface type to 2D grid.
324	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%usws, surf_lsm_h%usws, &
325	surf_usm_h%usws )
326	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
327	comm2d, ierr )
328	CALL interpolate_to_ocean( 16 )
329	!
330	!-- Receive u at the bottom surface from the ocean
331	IF ( myid == 0 ) THEN
332	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
333	target_id, 17, comm_inter, status, ierr )
334	ENDIF
335	CALL MPI_BARRIER( comm2d, ierr )
336	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
337	ierr )
338	u(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
339	!
340	!-- Receive v at the bottom surface from the ocean
341	IF ( myid == 0 ) THEN
342	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
343	target_id, 18, comm_inter, status, ierr )
344	ENDIF
345	CALL MPI_BARRIER( comm2d, ierr )
346	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
347	ierr )
348	v(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
349
350	ENDIF
351
352	ELSEIF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
353
354	!
355	!-- Horizontal grid size and number of processors is equal
356	!-- in ocean and atmosphere
357	IF ( coupling_topology == 0 ) THEN
358	!
359	!-- Receive heat flux at the sea surface (top) from the atmosphere
360	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 12, &
361	comm_inter, status, ierr )
362	CALL transfer_2D_to_1D_equal( surf_def_h(2)%shf )
363	!
364	!-- Receive humidity flux from the atmosphere (bottom)
365	!-- and add it to the heat flux at the sea surface (top)...
366	IF ( humidity_remote ) THEN
367	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, &
368	target_id, 13, comm_inter, status, ierr )
369	CALL transfer_2D_to_1D_equal( surf_def_h(2)%qsws )
370	ENDIF
371	!
372	!-- Send sea surface temperature to the atmosphere model
373	CALL MPI_SEND( pt(nzt,nysg,nxlg), 1, type_xy, target_id, 14, &
374	comm_inter, ierr )
375	!
376	!-- Receive momentum flux (u) at the sea surface (top) from the atmosphere
377	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 15, &
378	comm_inter, status, ierr )
379	CALL transfer_2D_to_1D_equal( surf_def_h(2)%usws )
380	!
381	!-- Receive momentum flux (v) at the sea surface (top) from the atmosphere
382	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 16, &
383	comm_inter, status, ierr )
384	CALL transfer_2D_to_1D_equal( surf_def_h(2)%vsws )
385	!
386	!-- Send u to the atmosphere
387	CALL MPI_SEND( u(nzt,nysg,nxlg), 1, type_xy, target_id, 17, &
388	comm_inter, ierr )
389	!
390	!-- Send v to the atmosphere
391	CALL MPI_SEND( v(nzt,nysg,nxlg), 1, type_xy, target_id, 18, &
392	comm_inter, ierr )
393	!
394	!-- Horizontal gridsize or number of processors differs between
395	!-- ocean and atmosphere
396	ELSE
397	!
398	!-- Receive heat flux at the sea surface (top) from the atmosphere
399	IF ( myid == 0 ) THEN
400	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
401	target_id, 12, comm_inter, status, ierr )
402	ENDIF
403	CALL MPI_BARRIER( comm2d, ierr )
404	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, &
405	ierr )
406	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%shf )
407	!
408	!-- Receive humidity flux at the sea surface (top) from the atmosphere
409	IF ( humidity_remote ) THEN
410	IF ( myid == 0 ) THEN
411	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
412	target_id, 13, comm_inter, status, ierr )
413	ENDIF
414	CALL MPI_BARRIER( comm2d, ierr )
415	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, &
416	comm2d, ierr)
417	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%qsws )
418	ENDIF
419	!
420	!-- Send surface temperature to atmosphere
421	total_2d_o = 0.0_wp
422	total_2d = 0.0_wp
423	total_2d(nys:nyn,nxl:nxr) = pt(nzt,nys:nyn,nxl:nxr)
424
425	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
426	comm2d, ierr)
427	CALL interpolate_to_atmos( 14 )
428	!
429	!-- Receive momentum flux (u) at the sea surface (top) from the atmosphere
430	IF ( myid == 0 ) THEN
431	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
432	target_id, 15, comm_inter, status, ierr )
433	ENDIF
434	CALL MPI_BARRIER( comm2d, ierr )
435	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
436	0, comm2d, ierr )
437	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%usws )
438	!
439	!-- Receive momentum flux (v) at the sea surface (top) from the atmosphere
440	IF ( myid == 0 ) THEN
441	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
442	target_id, 16, comm_inter, status, ierr )
443	ENDIF
444	CALL MPI_BARRIER( comm2d, ierr )
445	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, &
446	ierr )
447	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%vsws )
448	!
449	!-- Send u to atmosphere
450	total_2d_o = 0.0_wp
451	total_2d = 0.0_wp
452	total_2d(nys:nyn,nxl:nxr) = u(nzt,nys:nyn,nxl:nxr)
453	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
454	comm2d, ierr )
455	CALL interpolate_to_atmos( 17 )
456	!
457	!-- Send v to atmosphere
458	total_2d_o = 0.0_wp
459	total_2d = 0.0_wp
460	total_2d(nys:nyn,nxl:nxr) = v(nzt,nys:nyn,nxl:nxr)
461	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
462	comm2d, ierr )
463	CALL interpolate_to_atmos( 18 )
464
465	ENDIF
466
467	!
468	!-- Conversions of fluxes received from atmosphere
469	IF ( humidity_remote ) THEN
470	!
471	!-- Here top heat flux is still the sum of atmospheric bottom heat fluxes,
472	!-- * latent heat of vaporization in m2/s2, or 540 cal/g, or 40.65 kJ/mol
473	!-- /(rho_atm(=1.0)*c_p)
474	DO m = 1, surf_def_h(2)%ns
475	i = surf_def_h(2)%i(m)
476	j = surf_def_h(2)%j(m)
477
478	surf_def_h(2)%shf(m) = surf_def_h(2)%shf(m) + &
479	surf_def_h(2)%qsws(m) * l_v / cp
480	!
481	!-- ...and convert it to a salinity flux at the sea surface (top)
482	!-- following Steinhorn (1991), JPO 21, pp. 1681-1683:
483	!-- S'w' = -S * evaporation / ( rho_water * ( 1 - S ) )
484	surf_def_h(2)%sasws(m) = -1.0_wp * sa(nzt,j,i) * 0.001_wp * &
485	surf_def_h(2)%qsws(m) / &
486	( rho_ocean(nzt,j,i) * &
487	( 1.0_wp - sa(nzt,j,i) * 0.001_wp ) &
488	)
489	ENDDO
490	ENDIF
491
492	!
493	!-- Adjust the kinematic heat flux with respect to ocean density
494	!-- (constants are the specific heat capacities for air and water), as well
495	!-- as momentum fluxes
496	DO m = 1, surf_def_h(2)%ns
497	i = surf_def_h(2)%i(m)
498	j = surf_def_h(2)%j(m)
499	surf_def_h(2)%shf(m) = surf_def_h(2)%shf(m) / rho_ocean(nzt,j,i) * &
500	cp / cpw
501
502	surf_def_h(2)%usws(m) = surf_def_h(2)%usws(m) / rho_ocean(nzt,j,i)
503	surf_def_h(2)%vsws(m) = surf_def_h(2)%vsws(m) / rho_ocean(nzt,j,i)
504	ENDDO
505
506	ENDIF
507
508	IF ( coupling_topology == 1 ) THEN
509	DEALLOCATE( total_2d_o, total_2d_a )
510	ENDIF
511
512	CALL cpu_log( log_point(39), 'surface_coupler', 'stop' )
513
514	#endif
515
516	CONTAINS
517
518	! Description:
519	!------------------------------------------------------------------------------!
520	!> Data transfer from 1D surface-data type to 2D dummy array for equal
521	!> grids in atmosphere and ocean.
522	!------------------------------------------------------------------------------!
523	SUBROUTINE transfer_1D_to_2D_equal( def_1d, lsm_1d, usm_1d )
524
525	IMPLICIT NONE
526
527	INTEGER(iwp) :: i !< running index x
528	INTEGER(iwp) :: j !< running index y
529	INTEGER(iwp) :: m !< running index surface type
530
531	REAL(wp), DIMENSION(1:surf_def_h(0)%ns) :: def_1d !< 1D surface flux, default surfaces
532	REAL(wp), DIMENSION(1:surf_lsm_h%ns) :: lsm_1d !< 1D surface flux, natural surfaces
533	REAL(wp), DIMENSION(1:surf_usm_h%ns) :: usm_1d !< 1D surface flux, urban surfaces
534	!
535	!-- Transfer surface flux at default surfaces to 2D grid
536	DO m = 1, surf_def_h(0)%ns
537	i = surf_def_h(0)%i(m)
538	j = surf_def_h(0)%j(m)
539	surface_flux(j,i) = def_1d(m)
540	ENDDO
541	!
542	!-- Transfer surface flux at natural surfaces to 2D grid
543	IF ( land_surface ) THEN
544	DO m = 1, SIZE(lsm_1d)
545	i = surf_lsm_h%i(m)
546	j = surf_lsm_h%j(m)
547	surface_flux(j,i) = lsm_1d(m)
548	ENDDO
549	ENDIF
550	!
551	!-- Transfer surface flux at natural surfaces to 2D grid
552	IF ( urban_surface ) THEN
553	DO m = 1, SIZE(usm_1d)
554	i = surf_usm_h%i(m)
555	j = surf_usm_h%j(m)
556	surface_flux(j,i) = usm_1d(m)
557	ENDDO
558	ENDIF
559
560	END SUBROUTINE transfer_1D_to_2D_equal
561
562	! Description:
563	!------------------------------------------------------------------------------!
564	!> Data transfer from 2D array for equal grids onto 1D surface-data type
565	!> array.
566	!------------------------------------------------------------------------------!
567	SUBROUTINE transfer_2D_to_1D_equal( def_1d )
568
569	IMPLICIT NONE
570
571	INTEGER(iwp) :: i !< running index x
572	INTEGER(iwp) :: j !< running index y
573	INTEGER(iwp) :: m !< running index surface type
574
575	REAL(wp), DIMENSION(1:surf_def_h(2)%ns) :: def_1d !< 1D surface flux, default surfaces
576	!
577	!-- Transfer surface flux to 1D surface type, only for default surfaces
578	DO m = 1, surf_def_h(2)%ns
579	i = surf_def_h(2)%i(m)
580	j = surf_def_h(2)%j(m)
581	def_1d(m) = surface_flux(j,i)
582	ENDDO
583
584	END SUBROUTINE transfer_2D_to_1D_equal
585
586	! Description:
587	!------------------------------------------------------------------------------!
588	!> Data transfer from 1D surface-data type to 2D dummy array from unequal
589	!> grids in atmosphere and ocean.
590	!------------------------------------------------------------------------------!
591	SUBROUTINE transfer_1D_to_2D_unequal( def_1d, lsm_1d, usm_1d )
592
593	IMPLICIT NONE
594
595	INTEGER(iwp) :: i !< running index x
596	INTEGER(iwp) :: j !< running index y
597	INTEGER(iwp) :: m !< running index surface type
598
599	REAL(wp), DIMENSION(1:surf_def_h(0)%ns) :: def_1d !< 1D surface flux, default surfaces
600	REAL(wp), DIMENSION(1:surf_lsm_h%ns) :: lsm_1d !< 1D surface flux, natural surfaces
601	REAL(wp), DIMENSION(1:surf_usm_h%ns) :: usm_1d !< 1D surface flux, urban surfaces
602	!
603	!-- Transfer surface flux at default surfaces to 2D grid. Transfer no
604	!-- ghost-grid points since total_2d is a global array.
605	DO m = 1, SIZE(def_1d)
606	i = surf_def_h(0)%i(m)
607	j = surf_def_h(0)%j(m)
608
609	IF ( i >= nxl .AND. i <= nxr .AND. &
610	j >= nys .AND. j <= nyn ) THEN
611	total_2d(j,i) = def_1d(m)
612	ENDIF
613	ENDDO
614	!
615	!-- Transfer surface flux at natural surfaces to 2D grid
616	IF ( land_surface ) THEN
617	DO m = 1, SIZE(lsm_1d)
618	i = surf_lsm_h%i(m)
619	j = surf_lsm_h%j(m)
620
621	IF ( i >= nxl .AND. i <= nxr .AND. &
622	j >= nys .AND. j <= nyn ) THEN
623	total_2d(j,i) = lsm_1d(m)
624	ENDIF
625	ENDDO
626	ENDIF
627	!
628	!-- Transfer surface flux at natural surfaces to 2D grid
629	IF ( urban_surface ) THEN
630	DO m = 1, SIZE(usm_1d)
631	i = surf_usm_h%i(m)
632	j = surf_usm_h%j(m)
633
634	IF ( i >= nxl .AND. i <= nxr .AND. &
635	j >= nys .AND. j <= nyn ) THEN
636	total_2d(j,i) = usm_1d(m)
637	ENDIF
638	ENDDO
639	ENDIF
640
641	END SUBROUTINE transfer_1D_to_2D_unequal
642
643	! Description:
644	!------------------------------------------------------------------------------!
645	!> Data transfer from 2D dummy array from unequal grids to 1D surface-data
646	!> type.
647	!------------------------------------------------------------------------------!
648	SUBROUTINE transfer_2D_to_1D_unequal( def_1d )
649
650	IMPLICIT NONE
651
652	INTEGER(iwp) :: i !< running index x
653	INTEGER(iwp) :: j !< running index y
654	INTEGER(iwp) :: m !< running index surface type
655
656	REAL(wp), DIMENSION(1:surf_def_h(2)%ns) :: def_1d !< 1D surface flux, default surfaces
657	!
658	!-- Transfer 2D surface flux to default surfaces data type. Transfer no
659	!-- ghost-grid points since total_2d is a global array.
660	DO m = 1, SIZE(def_1d)
661	i = surf_def_h(2)%i(m)
662	j = surf_def_h(2)%j(m)
663
664	IF ( i >= nxl .AND. i <= nxr .AND. &
665	j >= nys .AND. j <= nyn ) THEN
666	def_1d(m) = total_2d_o(j,i)
667	ENDIF
668	ENDDO
669
670
671	END SUBROUTINE transfer_2D_to_1D_unequal
672
673	END SUBROUTINE surface_coupler
674
675
676
677	!------------------------------------------------------------------------------!
678	! Description:
679	! ------------
680	!> @todo Missing subroutine description.
681	!------------------------------------------------------------------------------!
682	SUBROUTINE interpolate_to_atmos( tag )
683
684	#if defined( __parallel )
685
686	USE arrays_3d, &
687	ONLY: total_2d_a, total_2d_o
688
689	USE indices, &
690	ONLY: nbgp, nx, nx_a, nx_o, ny, ny_a, ny_o
691
692	USE kinds
693
694	USE pegrid
695
696	IMPLICIT NONE
697
698	INTEGER(iwp) :: dnx !<
699	INTEGER(iwp) :: dnx2 !<
700	INTEGER(iwp) :: dny !<
701	INTEGER(iwp) :: dny2 !<
702	INTEGER(iwp) :: i !<
703	INTEGER(iwp) :: ii !<
704	INTEGER(iwp) :: j !<
705	INTEGER(iwp) :: jj !<
706
707	INTEGER(iwp), intent(in) :: tag !<
708
709	CALL MPI_BARRIER( comm2d, ierr )
710
711	IF ( myid == 0 ) THEN
712	!
713	!-- Cyclic boundary conditions for the total 2D-grid
714	total_2d_o(-nbgp:-1,:) = total_2d_o(ny+1-nbgp:ny,:)
715	total_2d_o(:,-nbgp:-1) = total_2d_o(:,nx+1-nbgp:nx)
716
717	total_2d_o(ny+1:ny+nbgp,:) = total_2d_o(0:nbgp-1,:)
718	total_2d_o(:,nx+1:nx+nbgp) = total_2d_o(:,0:nbgp-1)
719
720	!
721	!-- Number of gridpoints of the fine grid within one mesh of the coarse grid
722	dnx = (nx_o+1) / (nx_a+1)
723	dny = (ny_o+1) / (ny_a+1)
724
725	!
726	!-- Distance for interpolation around coarse grid points within the fine
727	!-- grid (note: 2*dnx2 must not be equal with dnx)
728	dnx2 = 2 * ( dnx / 2 )
729	dny2 = 2 * ( dny / 2 )
730
731	total_2d_a = 0.0_wp
732	!
733	!-- Interpolation from ocean-grid-layer to atmosphere-grid-layer
734	DO j = 0, ny_a
735	DO i = 0, nx_a
736	DO jj = 0, dny2
737	DO ii = 0, dnx2
738	total_2d_a(j,i) = total_2d_a(j,i) &
739	+ total_2d_o(jdny+jj,idnx+ii)
740	ENDDO
741	ENDDO
742	total_2d_a(j,i) = total_2d_a(j,i) / ( ( dnx2 + 1 ) * ( dny2 + 1 ) )
743	ENDDO
744	ENDDO
745	!
746	!-- Cyclic boundary conditions for atmosphere grid
747	total_2d_a(-nbgp:-1,:) = total_2d_a(ny_a+1-nbgp:ny_a,:)
748	total_2d_a(:,-nbgp:-1) = total_2d_a(:,nx_a+1-nbgp:nx_a)
749
750	total_2d_a(ny_a+1:ny_a+nbgp,:) = total_2d_a(0:nbgp-1,:)
751	total_2d_a(:,nx_a+1:nx_a+nbgp) = total_2d_a(:,0:nbgp-1)
752	!
753	!-- Transfer of the atmosphere-grid-layer to the atmosphere
754	CALL MPI_SEND( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, target_id, &
755	tag, comm_inter, ierr )
756
757	ENDIF
758
759	CALL MPI_BARRIER( comm2d, ierr )
760
761	#endif
762
763	END SUBROUTINE interpolate_to_atmos
764
765
766	!------------------------------------------------------------------------------!
767	! Description:
768	! ------------
769	!> @todo Missing subroutine description.
770	!------------------------------------------------------------------------------!
771	SUBROUTINE interpolate_to_ocean( tag )
772
773	#if defined( __parallel )
774
775	USE arrays_3d, &
776	ONLY: total_2d_a, total_2d_o
777
778	USE indices, &
779	ONLY: nbgp, nx, nx_a, nx_o, ny, ny_a, ny_o
780
781	USE kinds
782
783	USE pegrid
784
785	IMPLICIT NONE
786
787	INTEGER(iwp) :: dnx !<
788	INTEGER(iwp) :: dny !<
789	INTEGER(iwp) :: i !<
790	INTEGER(iwp) :: ii !<
791	INTEGER(iwp) :: j !<
792	INTEGER(iwp) :: jj !<
793	INTEGER(iwp), intent(in) :: tag !<
794
795	REAL(wp) :: fl !<
796	REAL(wp) :: fr !<
797	REAL(wp) :: myl !<
798	REAL(wp) :: myr !<
799
800	CALL MPI_BARRIER( comm2d, ierr )
801
802	IF ( myid == 0 ) THEN
803
804	!
805	!-- Number of gridpoints of the fine grid within one mesh of the coarse grid
806	dnx = ( nx_o + 1 ) / ( nx_a + 1 )
807	dny = ( ny_o + 1 ) / ( ny_a + 1 )
808
809	!
810	!-- Cyclic boundary conditions for atmosphere grid
811	total_2d_a(-nbgp:-1,:) = total_2d_a(ny+1-nbgp:ny,:)
812	total_2d_a(:,-nbgp:-1) = total_2d_a(:,nx+1-nbgp:nx)
813
814	total_2d_a(ny+1:ny+nbgp,:) = total_2d_a(0:nbgp-1,:)
815	total_2d_a(:,nx+1:nx+nbgp) = total_2d_a(:,0:nbgp-1)
816	!
817	!-- Bilinear Interpolation from atmosphere grid-layer to ocean grid-layer
818	DO j = 0, ny
819	DO i = 0, nx
820	myl = ( total_2d_a(j+1,i) - total_2d_a(j,i) ) / dny
821	myr = ( total_2d_a(j+1,i+1) - total_2d_a(j,i+1) ) / dny
822	DO jj = 0, dny-1
823	fl = myl*jj + total_2d_a(j,i)
824	fr = myr*jj + total_2d_a(j,i+1)
825	DO ii = 0, dnx-1
826	total_2d_o(jdny+jj,idnx+ii) = ( fr - fl ) / dnx * ii + fl
827	ENDDO
828	ENDDO
829	ENDDO
830	ENDDO
831	!
832	!-- Cyclic boundary conditions for ocean grid
833	total_2d_o(-nbgp:-1,:) = total_2d_o(ny_o+1-nbgp:ny_o,:)
834	total_2d_o(:,-nbgp:-1) = total_2d_o(:,nx_o+1-nbgp:nx_o)
835
836	total_2d_o(ny_o+1:ny_o+nbgp,:) = total_2d_o(0:nbgp-1,:)
837	total_2d_o(:,nx_o+1:nx_o+nbgp) = total_2d_o(:,0:nbgp-1)
838
839	CALL MPI_SEND( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
840	target_id, tag, comm_inter, ierr )
841
842	ENDIF
843
844	CALL MPI_BARRIER( comm2d, ierr )
845
846	#endif
847
848	END SUBROUTINE interpolate_to_ocean

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