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source: palm/trunk/SOURCE/surface_coupler.f90 @ 3046

Last change on this file since 3046 was 3046, checked in by Giersch, 6 years ago
Remaining error messages revised, comments extended
Property svn:keywords set to `Id`
File size: 31.9 KB

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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	! Error messages revised
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: surface_coupler.f90 3046 2018-05-29 08:02:15Z Giersch $
27	! Error message revised
28	!
29	! 2718 2018-01-02 08:49:38Z maronga
30	! Corrected "Former revisions" section
31	!
32	! 2696 2017-12-14 17:12:51Z kanani
33	! Change in file header (GPL part)
34	!
35	! 2233 2017-05-30 18:08:54Z suehring
36	!
37	! 2232 2017-05-30 17:47:52Z suehring
38	! Adjust to new surface structure. Transfer 1D surface fluxes onto 2D grid
39	! (and back).
40	!
41	! 2031 2016-10-21 15:11:58Z knoop
42	! renamed variable rho to rho_ocean
43	!
44	! 2000 2016-08-20 18:09:15Z knoop
45	! Forced header and separation lines into 80 columns
46	!
47	! 1682 2015-10-07 23:56:08Z knoop
48	! Code annotations made doxygen readable
49	!
50	! 1427 2014-07-07 14:04:59Z maronga
51	! Bugfix: value of l_v corrected.
52	!
53	! 1418 2014-06-06 13:05:08Z fricke
54	! Bugfix: For caluclation of the salinity flux at the sea surface,
55	! the given value for salinity must be in percent and not in psu
56	!
57	! 1353 2014-04-08 15:21:23Z heinze
58	! REAL constants provided with KIND-attribute
59	!
60	! 1324 2014-03-21 09:13:16Z suehring
61	! Bugfix: ONLY statement for module pegrid removed
62	!
63	! 1322 2014-03-20 16:38:49Z raasch
64	! REAL constants defined as wp-kind
65	!
66	! 1320 2014-03-20 08:40:49Z raasch
67	! ONLY-attribute added to USE-statements,
68	! kind-parameters added to all INTEGER and REAL declaration statements,
69	! kinds are defined in new module kinds,
70	! old module precision_kind is removed,
71	! revision history before 2012 removed,
72	! comment fields (!:) to be used for variable explanations added to
73	! all variable declaration statements
74	!
75	! 1318 2014-03-17 13:35:16Z raasch
76	! module interfaces removed
77	!
78	! 1092 2013-02-02 11:24:22Z raasch
79	! unused variables removed
80	!
81	! 1036 2012-10-22 13:43:42Z raasch
82	! code put under GPL (PALM 3.9)
83	!
84	! 880 2012-04-13 06:28:59Z raasch
85	! Bugfix: preprocessor statements for parallel execution added
86	!
87	! 109 2007-08-28 15:26:47Z letzel
88	! Initial revision
89	!
90	! Description:
91	! ------------
92	!> Data exchange at the interface between coupled models
93	!------------------------------------------------------------------------------!
94	SUBROUTINE surface_coupler
95
96
97	USE arrays_3d, &
98	ONLY: pt, rho_ocean, sa, total_2d_a, total_2d_o, u, v
99
100	USE cloud_parameters, &
101	ONLY: cp, l_v
102
103	USE control_parameters, &
104	ONLY: coupling_mode, coupling_mode_remote, coupling_topology, &
105	humidity, humidity_remote, land_surface, message_string, &
106	terminate_coupled, terminate_coupled_remote, &
107	time_since_reference_point, urban_surface
108
109	USE cpulog, &
110	ONLY: cpu_log, log_point
111
112	USE indices, &
113	ONLY: nbgp, nx, nxl, nxlg, nxr, nxrg, nx_a, nx_o, ny, nyn, nyng, nys, &
114	nysg, ny_a, ny_o, nzt
115
116	USE kinds
117
118	USE pegrid
119
120	USE surface_mod, &
121	ONLY : surf_def_h, surf_lsm_h, surf_type, surf_usm_h
122
123	IMPLICIT NONE
124
125	INTEGER(iwp) :: i !< index variable x-direction
126	INTEGER(iwp) :: j !< index variable y-direction
127	INTEGER(iwp) :: m !< running index for surface elements
128
129	REAL(wp) :: cpw = 4218.0_wp !< heat capacity of water at constant pressure
130	REAL(wp) :: time_since_reference_point_rem !<
131	REAL(wp) :: total_2d(-nbgp:ny+nbgp,-nbgp:nx+nbgp) !<
132
133	REAL(wp), DIMENSION(nysg:nyng,nxlg:nxrg) :: surface_flux !< dummy array for surface fluxes on 2D grid
134
135
136	#if defined( __parallel )
137
138	CALL cpu_log( log_point(39), 'surface_coupler', 'start' )
139
140
141
142	!
143	!-- In case of model termination initiated by the remote model
144	!-- (terminate_coupled_remote > 0), initiate termination of the local model.
145	!-- The rest of the coupler must then be skipped because it would cause an MPI
146	!-- intercomminucation hang.
147	!-- If necessary, the coupler will be called at the beginning of the next
148	!-- restart run.
149
150	IF ( coupling_topology == 0 ) THEN
151	CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, target_id, &
152	0, &
153	terminate_coupled_remote, 1, MPI_INTEGER, target_id, &
154	0, comm_inter, status, ierr )
155	ELSE
156	IF ( myid == 0) THEN
157	CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, &
158	target_id, 0, &
159	terminate_coupled_remote, 1, MPI_INTEGER, &
160	target_id, 0, &
161	comm_inter, status, ierr )
162	ENDIF
163	CALL MPI_BCAST( terminate_coupled_remote, 1, MPI_INTEGER, 0, comm2d, &
164	ierr )
165
166	ALLOCATE( total_2d_a(-nbgp:ny_a+nbgp,-nbgp:nx_a+nbgp), &
167	total_2d_o(-nbgp:ny_o+nbgp,-nbgp:nx_o+nbgp) )
168
169	ENDIF
170
171	IF ( terminate_coupled_remote > 0 ) THEN
172	WRITE( message_string, * ) 'remote model "', &
173	TRIM( coupling_mode_remote ), &
174	'" terminated', &
175	'&with terminate_coupled_remote = ', &
176	terminate_coupled_remote, &
177	'&local model "', TRIM( coupling_mode ), &
178	'" has', &
179	'&terminate_coupled = ', &
180	terminate_coupled
181	CALL message( 'surface_coupler', 'PA0310', 1, 2, 0, 6, 0 )
182	RETURN
183	ENDIF
184
185
186	!
187	!-- Exchange the current simulated time between the models,
188	!-- currently just for total_2d
189	IF ( coupling_topology == 0 ) THEN
190
191	CALL MPI_SEND( time_since_reference_point, 1, MPI_REAL, target_id, 11, &
192	comm_inter, ierr )
193	CALL MPI_RECV( time_since_reference_point_rem, 1, MPI_REAL, target_id, &
194	11, comm_inter, status, ierr )
195	ELSE
196
197	IF ( myid == 0 ) THEN
198
199	CALL MPI_SEND( time_since_reference_point, 1, MPI_REAL, target_id, &
200	11, comm_inter, ierr )
201	CALL MPI_RECV( time_since_reference_point_rem, 1, MPI_REAL, &
202	target_id, 11, comm_inter, status, ierr )
203
204	ENDIF
205
206	CALL MPI_BCAST( time_since_reference_point_rem, 1, MPI_REAL, 0, comm2d, &
207	ierr )
208
209	ENDIF
210
211	!
212	!-- Exchange the interface data
213	IF ( coupling_mode == 'atmosphere_to_ocean' ) THEN
214
215	!
216	!-- Horizontal grid size and number of processors is equal in ocean and
217	!-- atmosphere
218	IF ( coupling_topology == 0 ) THEN
219
220	!
221	!-- Send heat flux at bottom surface to the ocean. First, transfer from
222	!-- 1D surface type to 2D grid.
223	CALL transfer_1D_to_2D_equal( surf_def_h(0)%shf, surf_lsm_h%shf, &
224	surf_usm_h%shf )
225	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
226	12, comm_inter, ierr )
227	!
228	!-- Send humidity flux at bottom surface to the ocean. First, transfer
229	!-- from 1D surface type to 2D grid.
230	CALL transfer_1D_to_2D_equal( surf_def_h(0)%qsws, surf_lsm_h%qsws, &
231	surf_usm_h%qsws )
232	IF ( humidity ) THEN
233	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, &
234	target_id, 13, comm_inter, ierr )
235	ENDIF
236	!
237	!-- Receive temperature at the bottom surface from the ocean
238	CALL MPI_RECV( pt(0,nysg,nxlg), 1, type_xy, target_id, 14, &
239	comm_inter, status, ierr )
240	!
241	!-- Send the momentum flux (u) at bottom surface to the ocean. First,
242	!-- transfer from 1D surface type to 2D grid.
243	CALL transfer_1D_to_2D_equal( surf_def_h(0)%usws, surf_lsm_h%usws, &
244	surf_usm_h%usws )
245	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
246	15, comm_inter, ierr )
247	!
248	!-- Send the momentum flux (v) at bottom surface to the ocean. First,
249	!-- transfer from 1D surface type to 2D grid.
250	CALL transfer_1D_to_2D_equal( surf_def_h(0)%vsws, surf_lsm_h%vsws, &
251	surf_usm_h%vsws )
252	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
253	16, comm_inter, ierr )
254	!
255	!-- Receive u at the bottom surface from the ocean
256	CALL MPI_RECV( u(0,nysg,nxlg), 1, type_xy, target_id, 17, &
257	comm_inter, status, ierr )
258	!
259	!-- Receive v at the bottom surface from the ocean
260	CALL MPI_RECV( v(0,nysg,nxlg), 1, type_xy, target_id, 18, &
261	comm_inter, status, ierr )
262	!
263	!-- Horizontal grid size or number of processors differs between
264	!-- ocean and atmosphere
265	ELSE
266
267	!
268	!-- Send heat flux at bottom surface to the ocean
269	total_2d_a = 0.0_wp
270	total_2d = 0.0_wp
271	!
272	!-- Transfer from 1D surface type to 2D grid.
273	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%shf, surf_lsm_h%shf, &
274	surf_usm_h%shf )
275
276	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
277	comm2d, ierr )
278	CALL interpolate_to_ocean( 12 )
279	!
280	!-- Send humidity flux at bottom surface to the ocean
281	IF ( humidity ) THEN
282	total_2d_a = 0.0_wp
283	total_2d = 0.0_wp
284	!
285	!-- Transfer from 1D surface type to 2D grid.
286	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%qsws, &
287	surf_lsm_h%qsws, &
288	surf_usm_h%qsws )
289
290	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, &
291	0, comm2d, ierr )
292	CALL interpolate_to_ocean( 13 )
293	ENDIF
294	!
295	!-- Receive temperature at the bottom surface from the ocean
296	IF ( myid == 0 ) THEN
297	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
298	target_id, 14, comm_inter, status, ierr )
299	ENDIF
300	CALL MPI_BARRIER( comm2d, ierr )
301	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
302	ierr )
303	pt(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
304	!
305	!-- Send momentum flux (u) at bottom surface to the ocean
306	total_2d_a = 0.0_wp
307	total_2d = 0.0_wp
308	!
309	!-- Transfer from 1D surface type to 2D grid.
310	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%usws, surf_lsm_h%usws, &
311	surf_usm_h%usws )
312	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
313	comm2d, ierr )
314	CALL interpolate_to_ocean( 15 )
315	!
316	!-- Send momentum flux (v) at bottom surface to the ocean
317	total_2d_a = 0.0_wp
318	total_2d = 0.0_wp
319	!
320	!-- Transfer from 1D surface type to 2D grid.
321	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%usws, surf_lsm_h%usws, &
322	surf_usm_h%usws )
323	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
324	comm2d, ierr )
325	CALL interpolate_to_ocean( 16 )
326	!
327	!-- Receive u at the bottom surface from the ocean
328	IF ( myid == 0 ) THEN
329	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
330	target_id, 17, comm_inter, status, ierr )
331	ENDIF
332	CALL MPI_BARRIER( comm2d, ierr )
333	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
334	ierr )
335	u(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
336	!
337	!-- Receive v at the bottom surface from the ocean
338	IF ( myid == 0 ) THEN
339	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
340	target_id, 18, comm_inter, status, ierr )
341	ENDIF
342	CALL MPI_BARRIER( comm2d, ierr )
343	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
344	ierr )
345	v(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
346
347	ENDIF
348
349	ELSEIF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
350
351	!
352	!-- Horizontal grid size and number of processors is equal
353	!-- in ocean and atmosphere
354	IF ( coupling_topology == 0 ) THEN
355	!
356	!-- Receive heat flux at the sea surface (top) from the atmosphere
357	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 12, &
358	comm_inter, status, ierr )
359	CALL transfer_2D_to_1D_equal( surf_def_h(2)%shf )
360	!
361	!-- Receive humidity flux from the atmosphere (bottom)
362	!-- and add it to the heat flux at the sea surface (top)...
363	IF ( humidity_remote ) THEN
364	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, &
365	target_id, 13, comm_inter, status, ierr )
366	CALL transfer_2D_to_1D_equal( surf_def_h(2)%qsws )
367	ENDIF
368	!
369	!-- Send sea surface temperature to the atmosphere model
370	CALL MPI_SEND( pt(nzt,nysg,nxlg), 1, type_xy, target_id, 14, &
371	comm_inter, ierr )
372	!
373	!-- Receive momentum flux (u) at the sea surface (top) from the atmosphere
374	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 15, &
375	comm_inter, status, ierr )
376	CALL transfer_2D_to_1D_equal( surf_def_h(2)%usws )
377	!
378	!-- Receive momentum flux (v) at the sea surface (top) from the atmosphere
379	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 16, &
380	comm_inter, status, ierr )
381	CALL transfer_2D_to_1D_equal( surf_def_h(2)%vsws )
382	!
383	!-- Send u to the atmosphere
384	CALL MPI_SEND( u(nzt,nysg,nxlg), 1, type_xy, target_id, 17, &
385	comm_inter, ierr )
386	!
387	!-- Send v to the atmosphere
388	CALL MPI_SEND( v(nzt,nysg,nxlg), 1, type_xy, target_id, 18, &
389	comm_inter, ierr )
390	!
391	!-- Horizontal gridsize or number of processors differs between
392	!-- ocean and atmosphere
393	ELSE
394	!
395	!-- Receive heat flux at the sea surface (top) from the atmosphere
396	IF ( myid == 0 ) THEN
397	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
398	target_id, 12, comm_inter, status, ierr )
399	ENDIF
400	CALL MPI_BARRIER( comm2d, ierr )
401	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, &
402	ierr )
403	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%shf )
404	!
405	!-- Receive humidity flux at the sea surface (top) from the atmosphere
406	IF ( humidity_remote ) THEN
407	IF ( myid == 0 ) THEN
408	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
409	target_id, 13, comm_inter, status, ierr )
410	ENDIF
411	CALL MPI_BARRIER( comm2d, ierr )
412	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, &
413	comm2d, ierr)
414	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%qsws )
415	ENDIF
416	!
417	!-- Send surface temperature to atmosphere
418	total_2d_o = 0.0_wp
419	total_2d = 0.0_wp
420	total_2d(nys:nyn,nxl:nxr) = pt(nzt,nys:nyn,nxl:nxr)
421
422	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
423	comm2d, ierr)
424	CALL interpolate_to_atmos( 14 )
425	!
426	!-- Receive momentum flux (u) at the sea surface (top) from the atmosphere
427	IF ( myid == 0 ) THEN
428	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
429	target_id, 15, comm_inter, status, ierr )
430	ENDIF
431	CALL MPI_BARRIER( comm2d, ierr )
432	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
433	0, comm2d, ierr )
434	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%usws )
435	!
436	!-- Receive momentum flux (v) at the sea surface (top) from the atmosphere
437	IF ( myid == 0 ) THEN
438	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
439	target_id, 16, comm_inter, status, ierr )
440	ENDIF
441	CALL MPI_BARRIER( comm2d, ierr )
442	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, &
443	ierr )
444	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%vsws )
445	!
446	!-- Send u to atmosphere
447	total_2d_o = 0.0_wp
448	total_2d = 0.0_wp
449	total_2d(nys:nyn,nxl:nxr) = u(nzt,nys:nyn,nxl:nxr)
450	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
451	comm2d, ierr )
452	CALL interpolate_to_atmos( 17 )
453	!
454	!-- Send v to atmosphere
455	total_2d_o = 0.0_wp
456	total_2d = 0.0_wp
457	total_2d(nys:nyn,nxl:nxr) = v(nzt,nys:nyn,nxl:nxr)
458	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
459	comm2d, ierr )
460	CALL interpolate_to_atmos( 18 )
461
462	ENDIF
463
464	!
465	!-- Conversions of fluxes received from atmosphere
466	IF ( humidity_remote ) THEN
467	!
468	!-- Here top heat flux is still the sum of atmospheric bottom heat fluxes,
469	!-- * latent heat of vaporization in m2/s2, or 540 cal/g, or 40.65 kJ/mol
470	!-- /(rho_atm(=1.0)*c_p)
471	DO m = 1, surf_def_h(2)%ns
472	i = surf_def_h(2)%i(m)
473	j = surf_def_h(2)%j(m)
474
475	surf_def_h(2)%shf(m) = surf_def_h(2)%shf(m) + &
476	surf_def_h(2)%qsws(m) * l_v / cp
477	!
478	!-- ...and convert it to a salinity flux at the sea surface (top)
479	!-- following Steinhorn (1991), JPO 21, pp. 1681-1683:
480	!-- S'w' = -S * evaporation / ( rho_water * ( 1 - S ) )
481	surf_def_h(2)%sasws(m) = -1.0_wp * sa(nzt,j,i) * 0.001_wp * &
482	surf_def_h(2)%qsws(m) / &
483	( rho_ocean(nzt,j,i) * &
484	( 1.0_wp - sa(nzt,j,i) * 0.001_wp ) &
485	)
486	ENDDO
487	ENDIF
488
489	!
490	!-- Adjust the kinematic heat flux with respect to ocean density
491	!-- (constants are the specific heat capacities for air and water), as well
492	!-- as momentum fluxes
493	DO m = 1, surf_def_h(2)%ns
494	i = surf_def_h(2)%i(m)
495	j = surf_def_h(2)%j(m)
496	surf_def_h(2)%shf(m) = surf_def_h(2)%shf(m) / rho_ocean(nzt,j,i) * &
497	cp / cpw
498
499	surf_def_h(2)%usws(m) = surf_def_h(2)%usws(m) / rho_ocean(nzt,j,i)
500	surf_def_h(2)%vsws(m) = surf_def_h(2)%vsws(m) / rho_ocean(nzt,j,i)
501	ENDDO
502
503	ENDIF
504
505	IF ( coupling_topology == 1 ) THEN
506	DEALLOCATE( total_2d_o, total_2d_a )
507	ENDIF
508
509	CALL cpu_log( log_point(39), 'surface_coupler', 'stop' )
510
511	#endif
512
513	CONTAINS
514
515	! Description:
516	!------------------------------------------------------------------------------!
517	!> Data transfer from 1D surface-data type to 2D dummy array for equal
518	!> grids in atmosphere and ocean.
519	!------------------------------------------------------------------------------!
520	SUBROUTINE transfer_1D_to_2D_equal( def_1d, lsm_1d, usm_1d )
521
522	IMPLICIT NONE
523
524	INTEGER(iwp) :: i !< running index x
525	INTEGER(iwp) :: j !< running index y
526	INTEGER(iwp) :: m !< running index surface type
527
528	REAL(wp), DIMENSION(1:surf_def_h(0)%ns) :: def_1d !< 1D surface flux, default surfaces
529	REAL(wp), DIMENSION(1:surf_lsm_h%ns) :: lsm_1d !< 1D surface flux, natural surfaces
530	REAL(wp), DIMENSION(1:surf_usm_h%ns) :: usm_1d !< 1D surface flux, urban surfaces
531	!
532	!-- Transfer surface flux at default surfaces to 2D grid
533	DO m = 1, surf_def_h(0)%ns
534	i = surf_def_h(0)%i(m)
535	j = surf_def_h(0)%j(m)
536	surface_flux(j,i) = def_1d(m)
537	ENDDO
538	!
539	!-- Transfer surface flux at natural surfaces to 2D grid
540	IF ( land_surface ) THEN
541	DO m = 1, SIZE(lsm_1d)
542	i = surf_lsm_h%i(m)
543	j = surf_lsm_h%j(m)
544	surface_flux(j,i) = lsm_1d(m)
545	ENDDO
546	ENDIF
547	!
548	!-- Transfer surface flux at natural surfaces to 2D grid
549	IF ( urban_surface ) THEN
550	DO m = 1, SIZE(usm_1d)
551	i = surf_usm_h%i(m)
552	j = surf_usm_h%j(m)
553	surface_flux(j,i) = usm_1d(m)
554	ENDDO
555	ENDIF
556
557	END SUBROUTINE transfer_1D_to_2D_equal
558
559	! Description:
560	!------------------------------------------------------------------------------!
561	!> Data transfer from 2D array for equal grids onto 1D surface-data type
562	!> array.
563	!------------------------------------------------------------------------------!
564	SUBROUTINE transfer_2D_to_1D_equal( def_1d )
565
566	IMPLICIT NONE
567
568	INTEGER(iwp) :: i !< running index x
569	INTEGER(iwp) :: j !< running index y
570	INTEGER(iwp) :: m !< running index surface type
571
572	REAL(wp), DIMENSION(1:surf_def_h(2)%ns) :: def_1d !< 1D surface flux, default surfaces
573	!
574	!-- Transfer surface flux to 1D surface type, only for default surfaces
575	DO m = 1, surf_def_h(2)%ns
576	i = surf_def_h(2)%i(m)
577	j = surf_def_h(2)%j(m)
578	def_1d(m) = surface_flux(j,i)
579	ENDDO
580
581	END SUBROUTINE transfer_2D_to_1D_equal
582
583	! Description:
584	!------------------------------------------------------------------------------!
585	!> Data transfer from 1D surface-data type to 2D dummy array from unequal
586	!> grids in atmosphere and ocean.
587	!------------------------------------------------------------------------------!
588	SUBROUTINE transfer_1D_to_2D_unequal( def_1d, lsm_1d, usm_1d )
589
590	IMPLICIT NONE
591
592	INTEGER(iwp) :: i !< running index x
593	INTEGER(iwp) :: j !< running index y
594	INTEGER(iwp) :: m !< running index surface type
595
596	REAL(wp), DIMENSION(1:surf_def_h(0)%ns) :: def_1d !< 1D surface flux, default surfaces
597	REAL(wp), DIMENSION(1:surf_lsm_h%ns) :: lsm_1d !< 1D surface flux, natural surfaces
598	REAL(wp), DIMENSION(1:surf_usm_h%ns) :: usm_1d !< 1D surface flux, urban surfaces
599	!
600	!-- Transfer surface flux at default surfaces to 2D grid. Transfer no
601	!-- ghost-grid points since total_2d is a global array.
602	DO m = 1, SIZE(def_1d)
603	i = surf_def_h(0)%i(m)
604	j = surf_def_h(0)%j(m)
605
606	IF ( i >= nxl .AND. i <= nxr .AND. &
607	j >= nys .AND. j <= nyn ) THEN
608	total_2d(j,i) = def_1d(m)
609	ENDIF
610	ENDDO
611	!
612	!-- Transfer surface flux at natural surfaces to 2D grid
613	IF ( land_surface ) THEN
614	DO m = 1, SIZE(lsm_1d)
615	i = surf_lsm_h%i(m)
616	j = surf_lsm_h%j(m)
617
618	IF ( i >= nxl .AND. i <= nxr .AND. &
619	j >= nys .AND. j <= nyn ) THEN
620	total_2d(j,i) = lsm_1d(m)
621	ENDIF
622	ENDDO
623	ENDIF
624	!
625	!-- Transfer surface flux at natural surfaces to 2D grid
626	IF ( urban_surface ) THEN
627	DO m = 1, SIZE(usm_1d)
628	i = surf_usm_h%i(m)
629	j = surf_usm_h%j(m)
630
631	IF ( i >= nxl .AND. i <= nxr .AND. &
632	j >= nys .AND. j <= nyn ) THEN
633	total_2d(j,i) = usm_1d(m)
634	ENDIF
635	ENDDO
636	ENDIF
637
638	END SUBROUTINE transfer_1D_to_2D_unequal
639
640	! Description:
641	!------------------------------------------------------------------------------!
642	!> Data transfer from 2D dummy array from unequal grids to 1D surface-data
643	!> type.
644	!------------------------------------------------------------------------------!
645	SUBROUTINE transfer_2D_to_1D_unequal( def_1d )
646
647	IMPLICIT NONE
648
649	INTEGER(iwp) :: i !< running index x
650	INTEGER(iwp) :: j !< running index y
651	INTEGER(iwp) :: m !< running index surface type
652
653	REAL(wp), DIMENSION(1:surf_def_h(2)%ns) :: def_1d !< 1D surface flux, default surfaces
654	!
655	!-- Transfer 2D surface flux to default surfaces data type. Transfer no
656	!-- ghost-grid points since total_2d is a global array.
657	DO m = 1, SIZE(def_1d)
658	i = surf_def_h(2)%i(m)
659	j = surf_def_h(2)%j(m)
660
661	IF ( i >= nxl .AND. i <= nxr .AND. &
662	j >= nys .AND. j <= nyn ) THEN
663	def_1d(m) = total_2d_o(j,i)
664	ENDIF
665	ENDDO
666
667
668	END SUBROUTINE transfer_2D_to_1D_unequal
669
670	END SUBROUTINE surface_coupler
671
672
673
674	!------------------------------------------------------------------------------!
675	! Description:
676	! ------------
677	!> @todo Missing subroutine description.
678	!------------------------------------------------------------------------------!
679	SUBROUTINE interpolate_to_atmos( tag )
680
681	#if defined( __parallel )
682
683	USE arrays_3d, &
684	ONLY: total_2d_a, total_2d_o
685
686	USE indices, &
687	ONLY: nbgp, nx, nx_a, nx_o, ny, ny_a, ny_o
688
689	USE kinds
690
691	USE pegrid
692
693	IMPLICIT NONE
694
695	INTEGER(iwp) :: dnx !<
696	INTEGER(iwp) :: dnx2 !<
697	INTEGER(iwp) :: dny !<
698	INTEGER(iwp) :: dny2 !<
699	INTEGER(iwp) :: i !<
700	INTEGER(iwp) :: ii !<
701	INTEGER(iwp) :: j !<
702	INTEGER(iwp) :: jj !<
703
704	INTEGER(iwp), intent(in) :: tag !<
705
706	CALL MPI_BARRIER( comm2d, ierr )
707
708	IF ( myid == 0 ) THEN
709	!
710	!-- Cyclic boundary conditions for the total 2D-grid
711	total_2d_o(-nbgp:-1,:) = total_2d_o(ny+1-nbgp:ny,:)
712	total_2d_o(:,-nbgp:-1) = total_2d_o(:,nx+1-nbgp:nx)
713
714	total_2d_o(ny+1:ny+nbgp,:) = total_2d_o(0:nbgp-1,:)
715	total_2d_o(:,nx+1:nx+nbgp) = total_2d_o(:,0:nbgp-1)
716
717	!
718	!-- Number of gridpoints of the fine grid within one mesh of the coarse grid
719	dnx = (nx_o+1) / (nx_a+1)
720	dny = (ny_o+1) / (ny_a+1)
721
722	!
723	!-- Distance for interpolation around coarse grid points within the fine
724	!-- grid (note: 2*dnx2 must not be equal with dnx)
725	dnx2 = 2 * ( dnx / 2 )
726	dny2 = 2 * ( dny / 2 )
727
728	total_2d_a = 0.0_wp
729	!
730	!-- Interpolation from ocean-grid-layer to atmosphere-grid-layer
731	DO j = 0, ny_a
732	DO i = 0, nx_a
733	DO jj = 0, dny2
734	DO ii = 0, dnx2
735	total_2d_a(j,i) = total_2d_a(j,i) &
736	+ total_2d_o(jdny+jj,idnx+ii)
737	ENDDO
738	ENDDO
739	total_2d_a(j,i) = total_2d_a(j,i) / ( ( dnx2 + 1 ) * ( dny2 + 1 ) )
740	ENDDO
741	ENDDO
742	!
743	!-- Cyclic boundary conditions for atmosphere grid
744	total_2d_a(-nbgp:-1,:) = total_2d_a(ny_a+1-nbgp:ny_a,:)
745	total_2d_a(:,-nbgp:-1) = total_2d_a(:,nx_a+1-nbgp:nx_a)
746
747	total_2d_a(ny_a+1:ny_a+nbgp,:) = total_2d_a(0:nbgp-1,:)
748	total_2d_a(:,nx_a+1:nx_a+nbgp) = total_2d_a(:,0:nbgp-1)
749	!
750	!-- Transfer of the atmosphere-grid-layer to the atmosphere
751	CALL MPI_SEND( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, target_id, &
752	tag, comm_inter, ierr )
753
754	ENDIF
755
756	CALL MPI_BARRIER( comm2d, ierr )
757
758	#endif
759
760	END SUBROUTINE interpolate_to_atmos
761
762
763	!------------------------------------------------------------------------------!
764	! Description:
765	! ------------
766	!> @todo Missing subroutine description.
767	!------------------------------------------------------------------------------!
768	SUBROUTINE interpolate_to_ocean( tag )
769
770	#if defined( __parallel )
771
772	USE arrays_3d, &
773	ONLY: total_2d_a, total_2d_o
774
775	USE indices, &
776	ONLY: nbgp, nx, nx_a, nx_o, ny, ny_a, ny_o
777
778	USE kinds
779
780	USE pegrid
781
782	IMPLICIT NONE
783
784	INTEGER(iwp) :: dnx !<
785	INTEGER(iwp) :: dny !<
786	INTEGER(iwp) :: i !<
787	INTEGER(iwp) :: ii !<
788	INTEGER(iwp) :: j !<
789	INTEGER(iwp) :: jj !<
790	INTEGER(iwp), intent(in) :: tag !<
791
792	REAL(wp) :: fl !<
793	REAL(wp) :: fr !<
794	REAL(wp) :: myl !<
795	REAL(wp) :: myr !<
796
797	CALL MPI_BARRIER( comm2d, ierr )
798
799	IF ( myid == 0 ) THEN
800
801	!
802	!-- Number of gridpoints of the fine grid within one mesh of the coarse grid
803	dnx = ( nx_o + 1 ) / ( nx_a + 1 )
804	dny = ( ny_o + 1 ) / ( ny_a + 1 )
805
806	!
807	!-- Cyclic boundary conditions for atmosphere grid
808	total_2d_a(-nbgp:-1,:) = total_2d_a(ny+1-nbgp:ny,:)
809	total_2d_a(:,-nbgp:-1) = total_2d_a(:,nx+1-nbgp:nx)
810
811	total_2d_a(ny+1:ny+nbgp,:) = total_2d_a(0:nbgp-1,:)
812	total_2d_a(:,nx+1:nx+nbgp) = total_2d_a(:,0:nbgp-1)
813	!
814	!-- Bilinear Interpolation from atmosphere grid-layer to ocean grid-layer
815	DO j = 0, ny
816	DO i = 0, nx
817	myl = ( total_2d_a(j+1,i) - total_2d_a(j,i) ) / dny
818	myr = ( total_2d_a(j+1,i+1) - total_2d_a(j,i+1) ) / dny
819	DO jj = 0, dny-1
820	fl = myl*jj + total_2d_a(j,i)
821	fr = myr*jj + total_2d_a(j,i+1)
822	DO ii = 0, dnx-1
823	total_2d_o(jdny+jj,idnx+ii) = ( fr - fl ) / dnx * ii + fl
824	ENDDO
825	ENDDO
826	ENDDO
827	ENDDO
828	!
829	!-- Cyclic boundary conditions for ocean grid
830	total_2d_o(-nbgp:-1,:) = total_2d_o(ny_o+1-nbgp:ny_o,:)
831	total_2d_o(:,-nbgp:-1) = total_2d_o(:,nx_o+1-nbgp:nx_o)
832
833	total_2d_o(ny_o+1:ny_o+nbgp,:) = total_2d_o(0:nbgp-1,:)
834	total_2d_o(:,nx_o+1:nx_o+nbgp) = total_2d_o(:,0:nbgp-1)
835
836	CALL MPI_SEND( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
837	target_id, tag, comm_inter, ierr )
838
839	ENDIF
840
841	CALL MPI_BARRIER( comm2d, ierr )
842
843	#endif
844
845	END SUBROUTINE interpolate_to_ocean

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