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source: palm/trunk/SOURCE/surface_coupler.f90 @ 4254

Last change on this file since 4254 was 4182, checked in by scharf, 5 years ago
corrected "Former revisions" section minor formatting in "Former revisions" section added "Author" section
Property svn:keywords set to `Id`
File size: 30.3 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 1997-2019 Leibniz Universitaet Hannover
18	!------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! ------------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: surface_coupler.f90 4182 2019-08-22 15:20:23Z maronga $
27	! Corrected "Former revisions" section
28	!
29	! 3655 2019-01-07 16:51:22Z knoop
30	! Modularization of all bulk cloud physics code components
31	!
32	! 109 2007-08-28 15:26:47Z letzel
33	! Initial revision
34	!
35	! Description:
36	! ------------
37	!> Data exchange at the interface between coupled models
38	!------------------------------------------------------------------------------!
39	SUBROUTINE surface_coupler
40
41
42	USE arrays_3d, &
43	ONLY: pt, rho_ocean, sa, total_2d_a, total_2d_o, u, v
44
45	USE basic_constants_and_equations_mod, &
46	ONLY: c_p, l_v
47
48	USE control_parameters, &
49	ONLY: coupling_mode, coupling_mode_remote, coupling_topology, &
50	humidity, humidity_remote, land_surface, message_string, &
51	terminate_coupled, terminate_coupled_remote, &
52	time_since_reference_point, urban_surface
53
54	USE cpulog, &
55	ONLY: cpu_log, log_point
56
57	USE indices, &
58	ONLY: nbgp, nx, nxl, nxlg, nxr, nxrg, nx_a, nx_o, ny, nyn, nyng, nys, &
59	nysg, ny_a, ny_o, nzt
60
61	USE kinds
62
63	USE pegrid
64
65	USE surface_mod, &
66	ONLY : surf_def_h, surf_lsm_h, surf_type, surf_usm_h
67
68	IMPLICIT NONE
69
70	INTEGER(iwp) :: i !< index variable x-direction
71	INTEGER(iwp) :: j !< index variable y-direction
72	INTEGER(iwp) :: m !< running index for surface elements
73
74	REAL(wp) :: cpw = 4218.0_wp !< heat capacity of water at constant pressure
75	REAL(wp) :: time_since_reference_point_rem !<
76	REAL(wp) :: total_2d(-nbgp:ny+nbgp,-nbgp:nx+nbgp) !<
77
78	REAL(wp), DIMENSION(nysg:nyng,nxlg:nxrg) :: surface_flux !< dummy array for surface fluxes on 2D grid
79
80
81	#if defined( __parallel )
82
83	CALL cpu_log( log_point(39), 'surface_coupler', 'start' )
84
85
86
87	!
88	!-- In case of model termination initiated by the remote model
89	!-- (terminate_coupled_remote > 0), initiate termination of the local model.
90	!-- The rest of the coupler must then be skipped because it would cause an MPI
91	!-- intercomminucation hang.
92	!-- If necessary, the coupler will be called at the beginning of the next
93	!-- restart run.
94
95	IF ( coupling_topology == 0 ) THEN
96	CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, target_id, &
97	0, &
98	terminate_coupled_remote, 1, MPI_INTEGER, target_id, &
99	0, comm_inter, status, ierr )
100	ELSE
101	IF ( myid == 0) THEN
102	CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, &
103	target_id, 0, &
104	terminate_coupled_remote, 1, MPI_INTEGER, &
105	target_id, 0, &
106	comm_inter, status, ierr )
107	ENDIF
108	CALL MPI_BCAST( terminate_coupled_remote, 1, MPI_INTEGER, 0, comm2d, &
109	ierr )
110
111	ALLOCATE( total_2d_a(-nbgp:ny_a+nbgp,-nbgp:nx_a+nbgp), &
112	total_2d_o(-nbgp:ny_o+nbgp,-nbgp:nx_o+nbgp) )
113
114	ENDIF
115
116	IF ( terminate_coupled_remote > 0 ) THEN
117	WRITE( message_string, * ) 'remote model "', &
118	TRIM( coupling_mode_remote ), &
119	'" terminated', &
120	'&with terminate_coupled_remote = ', &
121	terminate_coupled_remote, &
122	'&local model "', TRIM( coupling_mode ), &
123	'" has', &
124	'&terminate_coupled = ', &
125	terminate_coupled
126	CALL message( 'surface_coupler', 'PA0310', 1, 2, 0, 6, 0 )
127	RETURN
128	ENDIF
129
130
131	!
132	!-- Exchange the current simulated time between the models,
133	!-- currently just for total_2d
134	IF ( coupling_topology == 0 ) THEN
135
136	CALL MPI_SEND( time_since_reference_point, 1, MPI_REAL, target_id, 11, &
137	comm_inter, ierr )
138	CALL MPI_RECV( time_since_reference_point_rem, 1, MPI_REAL, target_id, &
139	11, comm_inter, status, ierr )
140	ELSE
141
142	IF ( myid == 0 ) THEN
143
144	CALL MPI_SEND( time_since_reference_point, 1, MPI_REAL, target_id, &
145	11, comm_inter, ierr )
146	CALL MPI_RECV( time_since_reference_point_rem, 1, MPI_REAL, &
147	target_id, 11, comm_inter, status, ierr )
148
149	ENDIF
150
151	CALL MPI_BCAST( time_since_reference_point_rem, 1, MPI_REAL, 0, comm2d, &
152	ierr )
153
154	ENDIF
155
156	!
157	!-- Exchange the interface data
158	IF ( coupling_mode == 'atmosphere_to_ocean' ) THEN
159
160	!
161	!-- Horizontal grid size and number of processors is equal in ocean and
162	!-- atmosphere
163	IF ( coupling_topology == 0 ) THEN
164
165	!
166	!-- Send heat flux at bottom surface to the ocean. First, transfer from
167	!-- 1D surface type to 2D grid.
168	CALL transfer_1D_to_2D_equal( surf_def_h(0)%shf, surf_lsm_h%shf, &
169	surf_usm_h%shf )
170	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
171	12, comm_inter, ierr )
172	!
173	!-- Send humidity flux at bottom surface to the ocean. First, transfer
174	!-- from 1D surface type to 2D grid.
175	CALL transfer_1D_to_2D_equal( surf_def_h(0)%qsws, surf_lsm_h%qsws, &
176	surf_usm_h%qsws )
177	IF ( humidity ) THEN
178	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, &
179	target_id, 13, comm_inter, ierr )
180	ENDIF
181	!
182	!-- Receive temperature at the bottom surface from the ocean
183	CALL MPI_RECV( pt(0,nysg,nxlg), 1, type_xy, target_id, 14, &
184	comm_inter, status, ierr )
185	!
186	!-- Send the momentum flux (u) at bottom surface to the ocean. First,
187	!-- transfer from 1D surface type to 2D grid.
188	CALL transfer_1D_to_2D_equal( surf_def_h(0)%usws, surf_lsm_h%usws, &
189	surf_usm_h%usws )
190	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
191	15, comm_inter, ierr )
192	!
193	!-- Send the momentum flux (v) at bottom surface to the ocean. First,
194	!-- transfer from 1D surface type to 2D grid.
195	CALL transfer_1D_to_2D_equal( surf_def_h(0)%vsws, surf_lsm_h%vsws, &
196	surf_usm_h%vsws )
197	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
198	16, comm_inter, ierr )
199	!
200	!-- Receive u at the bottom surface from the ocean
201	CALL MPI_RECV( u(0,nysg,nxlg), 1, type_xy, target_id, 17, &
202	comm_inter, status, ierr )
203	!
204	!-- Receive v at the bottom surface from the ocean
205	CALL MPI_RECV( v(0,nysg,nxlg), 1, type_xy, target_id, 18, &
206	comm_inter, status, ierr )
207	!
208	!-- Horizontal grid size or number of processors differs between
209	!-- ocean and atmosphere
210	ELSE
211
212	!
213	!-- Send heat flux at bottom surface to the ocean
214	total_2d_a = 0.0_wp
215	total_2d = 0.0_wp
216	!
217	!-- Transfer from 1D surface type to 2D grid.
218	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%shf, surf_lsm_h%shf, &
219	surf_usm_h%shf )
220
221	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
222	comm2d, ierr )
223	CALL interpolate_to_ocean( 12 )
224	!
225	!-- Send humidity flux at bottom surface to the ocean
226	IF ( humidity ) THEN
227	total_2d_a = 0.0_wp
228	total_2d = 0.0_wp
229	!
230	!-- Transfer from 1D surface type to 2D grid.
231	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%qsws, &
232	surf_lsm_h%qsws, &
233	surf_usm_h%qsws )
234
235	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, &
236	0, comm2d, ierr )
237	CALL interpolate_to_ocean( 13 )
238	ENDIF
239	!
240	!-- Receive temperature at the bottom surface from the ocean
241	IF ( myid == 0 ) THEN
242	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
243	target_id, 14, comm_inter, status, ierr )
244	ENDIF
245	CALL MPI_BARRIER( comm2d, ierr )
246	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
247	ierr )
248	pt(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
249	!
250	!-- Send momentum flux (u) at bottom surface to the ocean
251	total_2d_a = 0.0_wp
252	total_2d = 0.0_wp
253	!
254	!-- Transfer from 1D surface type to 2D grid.
255	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%usws, surf_lsm_h%usws, &
256	surf_usm_h%usws )
257	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
258	comm2d, ierr )
259	CALL interpolate_to_ocean( 15 )
260	!
261	!-- Send momentum flux (v) at bottom surface to the ocean
262	total_2d_a = 0.0_wp
263	total_2d = 0.0_wp
264	!
265	!-- Transfer from 1D surface type to 2D grid.
266	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%usws, surf_lsm_h%usws, &
267	surf_usm_h%usws )
268	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
269	comm2d, ierr )
270	CALL interpolate_to_ocean( 16 )
271	!
272	!-- Receive u at the bottom surface from the ocean
273	IF ( myid == 0 ) THEN
274	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
275	target_id, 17, comm_inter, status, ierr )
276	ENDIF
277	CALL MPI_BARRIER( comm2d, ierr )
278	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
279	ierr )
280	u(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
281	!
282	!-- Receive v at the bottom surface from the ocean
283	IF ( myid == 0 ) THEN
284	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
285	target_id, 18, comm_inter, status, ierr )
286	ENDIF
287	CALL MPI_BARRIER( comm2d, ierr )
288	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
289	ierr )
290	v(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
291
292	ENDIF
293
294	ELSEIF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
295
296	!
297	!-- Horizontal grid size and number of processors is equal
298	!-- in ocean and atmosphere
299	IF ( coupling_topology == 0 ) THEN
300	!
301	!-- Receive heat flux at the sea surface (top) from the atmosphere
302	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 12, &
303	comm_inter, status, ierr )
304	CALL transfer_2D_to_1D_equal( surf_def_h(2)%shf )
305	!
306	!-- Receive humidity flux from the atmosphere (bottom)
307	!-- and add it to the heat flux at the sea surface (top)...
308	IF ( humidity_remote ) THEN
309	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, &
310	target_id, 13, comm_inter, status, ierr )
311	CALL transfer_2D_to_1D_equal( surf_def_h(2)%qsws )
312	ENDIF
313	!
314	!-- Send sea surface temperature to the atmosphere model
315	CALL MPI_SEND( pt(nzt,nysg,nxlg), 1, type_xy, target_id, 14, &
316	comm_inter, ierr )
317	!
318	!-- Receive momentum flux (u) at the sea surface (top) from the atmosphere
319	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 15, &
320	comm_inter, status, ierr )
321	CALL transfer_2D_to_1D_equal( surf_def_h(2)%usws )
322	!
323	!-- Receive momentum flux (v) at the sea surface (top) from the atmosphere
324	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 16, &
325	comm_inter, status, ierr )
326	CALL transfer_2D_to_1D_equal( surf_def_h(2)%vsws )
327	!
328	!-- Send u to the atmosphere
329	CALL MPI_SEND( u(nzt,nysg,nxlg), 1, type_xy, target_id, 17, &
330	comm_inter, ierr )
331	!
332	!-- Send v to the atmosphere
333	CALL MPI_SEND( v(nzt,nysg,nxlg), 1, type_xy, target_id, 18, &
334	comm_inter, ierr )
335	!
336	!-- Horizontal gridsize or number of processors differs between
337	!-- ocean and atmosphere
338	ELSE
339	!
340	!-- Receive heat flux at the sea surface (top) from the atmosphere
341	IF ( myid == 0 ) THEN
342	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
343	target_id, 12, comm_inter, status, ierr )
344	ENDIF
345	CALL MPI_BARRIER( comm2d, ierr )
346	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, &
347	ierr )
348	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%shf )
349	!
350	!-- Receive humidity flux at the sea surface (top) from the atmosphere
351	IF ( humidity_remote ) THEN
352	IF ( myid == 0 ) THEN
353	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
354	target_id, 13, comm_inter, status, ierr )
355	ENDIF
356	CALL MPI_BARRIER( comm2d, ierr )
357	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, &
358	comm2d, ierr)
359	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%qsws )
360	ENDIF
361	!
362	!-- Send surface temperature to atmosphere
363	total_2d_o = 0.0_wp
364	total_2d = 0.0_wp
365	total_2d(nys:nyn,nxl:nxr) = pt(nzt,nys:nyn,nxl:nxr)
366
367	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
368	comm2d, ierr)
369	CALL interpolate_to_atmos( 14 )
370	!
371	!-- Receive momentum flux (u) at the sea surface (top) from the atmosphere
372	IF ( myid == 0 ) THEN
373	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
374	target_id, 15, comm_inter, status, ierr )
375	ENDIF
376	CALL MPI_BARRIER( comm2d, ierr )
377	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
378	0, comm2d, ierr )
379	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%usws )
380	!
381	!-- Receive momentum flux (v) at the sea surface (top) from the atmosphere
382	IF ( myid == 0 ) THEN
383	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
384	target_id, 16, comm_inter, status, ierr )
385	ENDIF
386	CALL MPI_BARRIER( comm2d, ierr )
387	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, &
388	ierr )
389	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%vsws )
390	!
391	!-- Send u to atmosphere
392	total_2d_o = 0.0_wp
393	total_2d = 0.0_wp
394	total_2d(nys:nyn,nxl:nxr) = u(nzt,nys:nyn,nxl:nxr)
395	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
396	comm2d, ierr )
397	CALL interpolate_to_atmos( 17 )
398	!
399	!-- Send v to atmosphere
400	total_2d_o = 0.0_wp
401	total_2d = 0.0_wp
402	total_2d(nys:nyn,nxl:nxr) = v(nzt,nys:nyn,nxl:nxr)
403	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
404	comm2d, ierr )
405	CALL interpolate_to_atmos( 18 )
406
407	ENDIF
408
409	!
410	!-- Conversions of fluxes received from atmosphere
411	IF ( humidity_remote ) THEN
412	!
413	!-- Here top heat flux is still the sum of atmospheric bottom heat fluxes,
414	!-- * latent heat of vaporization in m2/s2, or 540 cal/g, or 40.65 kJ/mol
415	!-- /(rho_atm(=1.0)*c_p)
416	DO m = 1, surf_def_h(2)%ns
417	i = surf_def_h(2)%i(m)
418	j = surf_def_h(2)%j(m)
419
420	surf_def_h(2)%shf(m) = surf_def_h(2)%shf(m) + &
421	surf_def_h(2)%qsws(m) * l_v / c_p
422	!
423	!-- ...and convert it to a salinity flux at the sea surface (top)
424	!-- following Steinhorn (1991), JPO 21, pp. 1681-1683:
425	!-- S'w' = -S * evaporation / ( rho_water * ( 1 - S ) )
426	surf_def_h(2)%sasws(m) = -1.0_wp * sa(nzt,j,i) * 0.001_wp * &
427	surf_def_h(2)%qsws(m) / &
428	( rho_ocean(nzt,j,i) * &
429	( 1.0_wp - sa(nzt,j,i) * 0.001_wp ) &
430	)
431	ENDDO
432	ENDIF
433
434	!
435	!-- Adjust the kinematic heat flux with respect to ocean density
436	!-- (constants are the specific heat capacities for air and water), as well
437	!-- as momentum fluxes
438	DO m = 1, surf_def_h(2)%ns
439	i = surf_def_h(2)%i(m)
440	j = surf_def_h(2)%j(m)
441	surf_def_h(2)%shf(m) = surf_def_h(2)%shf(m) / rho_ocean(nzt,j,i) * &
442	c_p / cpw
443
444	surf_def_h(2)%usws(m) = surf_def_h(2)%usws(m) / rho_ocean(nzt,j,i)
445	surf_def_h(2)%vsws(m) = surf_def_h(2)%vsws(m) / rho_ocean(nzt,j,i)
446	ENDDO
447
448	ENDIF
449
450	IF ( coupling_topology == 1 ) THEN
451	DEALLOCATE( total_2d_o, total_2d_a )
452	ENDIF
453
454	CALL cpu_log( log_point(39), 'surface_coupler', 'stop' )
455
456	#endif
457
458	CONTAINS
459
460	! Description:
461	!------------------------------------------------------------------------------!
462	!> Data transfer from 1D surface-data type to 2D dummy array for equal
463	!> grids in atmosphere and ocean.
464	!------------------------------------------------------------------------------!
465	SUBROUTINE transfer_1D_to_2D_equal( def_1d, lsm_1d, usm_1d )
466
467	IMPLICIT NONE
468
469	INTEGER(iwp) :: i !< running index x
470	INTEGER(iwp) :: j !< running index y
471	INTEGER(iwp) :: m !< running index surface type
472
473	REAL(wp), DIMENSION(1:surf_def_h(0)%ns) :: def_1d !< 1D surface flux, default surfaces
474	REAL(wp), DIMENSION(1:surf_lsm_h%ns) :: lsm_1d !< 1D surface flux, natural surfaces
475	REAL(wp), DIMENSION(1:surf_usm_h%ns) :: usm_1d !< 1D surface flux, urban surfaces
476	!
477	!-- Transfer surface flux at default surfaces to 2D grid
478	DO m = 1, surf_def_h(0)%ns
479	i = surf_def_h(0)%i(m)
480	j = surf_def_h(0)%j(m)
481	surface_flux(j,i) = def_1d(m)
482	ENDDO
483	!
484	!-- Transfer surface flux at natural surfaces to 2D grid
485	IF ( land_surface ) THEN
486	DO m = 1, SIZE(lsm_1d)
487	i = surf_lsm_h%i(m)
488	j = surf_lsm_h%j(m)
489	surface_flux(j,i) = lsm_1d(m)
490	ENDDO
491	ENDIF
492	!
493	!-- Transfer surface flux at natural surfaces to 2D grid
494	IF ( urban_surface ) THEN
495	DO m = 1, SIZE(usm_1d)
496	i = surf_usm_h%i(m)
497	j = surf_usm_h%j(m)
498	surface_flux(j,i) = usm_1d(m)
499	ENDDO
500	ENDIF
501
502	END SUBROUTINE transfer_1D_to_2D_equal
503
504	! Description:
505	!------------------------------------------------------------------------------!
506	!> Data transfer from 2D array for equal grids onto 1D surface-data type
507	!> array.
508	!------------------------------------------------------------------------------!
509	SUBROUTINE transfer_2D_to_1D_equal( def_1d )
510
511	IMPLICIT NONE
512
513	INTEGER(iwp) :: i !< running index x
514	INTEGER(iwp) :: j !< running index y
515	INTEGER(iwp) :: m !< running index surface type
516
517	REAL(wp), DIMENSION(1:surf_def_h(2)%ns) :: def_1d !< 1D surface flux, default surfaces
518	!
519	!-- Transfer surface flux to 1D surface type, only for default surfaces
520	DO m = 1, surf_def_h(2)%ns
521	i = surf_def_h(2)%i(m)
522	j = surf_def_h(2)%j(m)
523	def_1d(m) = surface_flux(j,i)
524	ENDDO
525
526	END SUBROUTINE transfer_2D_to_1D_equal
527
528	! Description:
529	!------------------------------------------------------------------------------!
530	!> Data transfer from 1D surface-data type to 2D dummy array from unequal
531	!> grids in atmosphere and ocean.
532	!------------------------------------------------------------------------------!
533	SUBROUTINE transfer_1D_to_2D_unequal( def_1d, lsm_1d, usm_1d )
534
535	IMPLICIT NONE
536
537	INTEGER(iwp) :: i !< running index x
538	INTEGER(iwp) :: j !< running index y
539	INTEGER(iwp) :: m !< running index surface type
540
541	REAL(wp), DIMENSION(1:surf_def_h(0)%ns) :: def_1d !< 1D surface flux, default surfaces
542	REAL(wp), DIMENSION(1:surf_lsm_h%ns) :: lsm_1d !< 1D surface flux, natural surfaces
543	REAL(wp), DIMENSION(1:surf_usm_h%ns) :: usm_1d !< 1D surface flux, urban surfaces
544	!
545	!-- Transfer surface flux at default surfaces to 2D grid. Transfer no
546	!-- ghost-grid points since total_2d is a global array.
547	DO m = 1, SIZE(def_1d)
548	i = surf_def_h(0)%i(m)
549	j = surf_def_h(0)%j(m)
550
551	IF ( i >= nxl .AND. i <= nxr .AND. &
552	j >= nys .AND. j <= nyn ) THEN
553	total_2d(j,i) = def_1d(m)
554	ENDIF
555	ENDDO
556	!
557	!-- Transfer surface flux at natural surfaces to 2D grid
558	IF ( land_surface ) THEN
559	DO m = 1, SIZE(lsm_1d)
560	i = surf_lsm_h%i(m)
561	j = surf_lsm_h%j(m)
562
563	IF ( i >= nxl .AND. i <= nxr .AND. &
564	j >= nys .AND. j <= nyn ) THEN
565	total_2d(j,i) = lsm_1d(m)
566	ENDIF
567	ENDDO
568	ENDIF
569	!
570	!-- Transfer surface flux at natural surfaces to 2D grid
571	IF ( urban_surface ) THEN
572	DO m = 1, SIZE(usm_1d)
573	i = surf_usm_h%i(m)
574	j = surf_usm_h%j(m)
575
576	IF ( i >= nxl .AND. i <= nxr .AND. &
577	j >= nys .AND. j <= nyn ) THEN
578	total_2d(j,i) = usm_1d(m)
579	ENDIF
580	ENDDO
581	ENDIF
582
583	END SUBROUTINE transfer_1D_to_2D_unequal
584
585	! Description:
586	!------------------------------------------------------------------------------!
587	!> Data transfer from 2D dummy array from unequal grids to 1D surface-data
588	!> type.
589	!------------------------------------------------------------------------------!
590	SUBROUTINE transfer_2D_to_1D_unequal( def_1d )
591
592	IMPLICIT NONE
593
594	INTEGER(iwp) :: i !< running index x
595	INTEGER(iwp) :: j !< running index y
596	INTEGER(iwp) :: m !< running index surface type
597
598	REAL(wp), DIMENSION(1:surf_def_h(2)%ns) :: def_1d !< 1D surface flux, default surfaces
599	!
600	!-- Transfer 2D surface flux to default surfaces data type. 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(2)%i(m)
604	j = surf_def_h(2)%j(m)
605
606	IF ( i >= nxl .AND. i <= nxr .AND. &
607	j >= nys .AND. j <= nyn ) THEN
608	def_1d(m) = total_2d_o(j,i)
609	ENDIF
610	ENDDO
611
612
613	END SUBROUTINE transfer_2D_to_1D_unequal
614
615	END SUBROUTINE surface_coupler
616
617
618
619	!------------------------------------------------------------------------------!
620	! Description:
621	! ------------
622	!> @todo Missing subroutine description.
623	!------------------------------------------------------------------------------!
624	SUBROUTINE interpolate_to_atmos( tag )
625
626	#if defined( __parallel )
627
628	USE arrays_3d, &
629	ONLY: total_2d_a, total_2d_o
630
631	USE indices, &
632	ONLY: nbgp, nx, nx_a, nx_o, ny, ny_a, ny_o
633
634	USE kinds
635
636	USE pegrid
637
638	IMPLICIT NONE
639
640	INTEGER(iwp) :: dnx !<
641	INTEGER(iwp) :: dnx2 !<
642	INTEGER(iwp) :: dny !<
643	INTEGER(iwp) :: dny2 !<
644	INTEGER(iwp) :: i !<
645	INTEGER(iwp) :: ii !<
646	INTEGER(iwp) :: j !<
647	INTEGER(iwp) :: jj !<
648
649	INTEGER(iwp), intent(in) :: tag !<
650
651	CALL MPI_BARRIER( comm2d, ierr )
652
653	IF ( myid == 0 ) THEN
654	!
655	!-- Cyclic boundary conditions for the total 2D-grid
656	total_2d_o(-nbgp:-1,:) = total_2d_o(ny+1-nbgp:ny,:)
657	total_2d_o(:,-nbgp:-1) = total_2d_o(:,nx+1-nbgp:nx)
658
659	total_2d_o(ny+1:ny+nbgp,:) = total_2d_o(0:nbgp-1,:)
660	total_2d_o(:,nx+1:nx+nbgp) = total_2d_o(:,0:nbgp-1)
661
662	!
663	!-- Number of gridpoints of the fine grid within one mesh of the coarse grid
664	dnx = (nx_o+1) / (nx_a+1)
665	dny = (ny_o+1) / (ny_a+1)
666
667	!
668	!-- Distance for interpolation around coarse grid points within the fine
669	!-- grid (note: 2*dnx2 must not be equal with dnx)
670	dnx2 = 2 * ( dnx / 2 )
671	dny2 = 2 * ( dny / 2 )
672
673	total_2d_a = 0.0_wp
674	!
675	!-- Interpolation from ocean-grid-layer to atmosphere-grid-layer
676	DO j = 0, ny_a
677	DO i = 0, nx_a
678	DO jj = 0, dny2
679	DO ii = 0, dnx2
680	total_2d_a(j,i) = total_2d_a(j,i) &
681	+ total_2d_o(jdny+jj,idnx+ii)
682	ENDDO
683	ENDDO
684	total_2d_a(j,i) = total_2d_a(j,i) / ( ( dnx2 + 1 ) * ( dny2 + 1 ) )
685	ENDDO
686	ENDDO
687	!
688	!-- Cyclic boundary conditions for atmosphere grid
689	total_2d_a(-nbgp:-1,:) = total_2d_a(ny_a+1-nbgp:ny_a,:)
690	total_2d_a(:,-nbgp:-1) = total_2d_a(:,nx_a+1-nbgp:nx_a)
691
692	total_2d_a(ny_a+1:ny_a+nbgp,:) = total_2d_a(0:nbgp-1,:)
693	total_2d_a(:,nx_a+1:nx_a+nbgp) = total_2d_a(:,0:nbgp-1)
694	!
695	!-- Transfer of the atmosphere-grid-layer to the atmosphere
696	CALL MPI_SEND( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, target_id, &
697	tag, comm_inter, ierr )
698
699	ENDIF
700
701	CALL MPI_BARRIER( comm2d, ierr )
702
703	#endif
704
705	END SUBROUTINE interpolate_to_atmos
706
707
708	!------------------------------------------------------------------------------!
709	! Description:
710	! ------------
711	!> @todo Missing subroutine description.
712	!------------------------------------------------------------------------------!
713	SUBROUTINE interpolate_to_ocean( tag )
714
715	#if defined( __parallel )
716
717	USE arrays_3d, &
718	ONLY: total_2d_a, total_2d_o
719
720	USE indices, &
721	ONLY: nbgp, nx, nx_a, nx_o, ny, ny_a, ny_o
722
723	USE kinds
724
725	USE pegrid
726
727	IMPLICIT NONE
728
729	INTEGER(iwp) :: dnx !<
730	INTEGER(iwp) :: dny !<
731	INTEGER(iwp) :: i !<
732	INTEGER(iwp) :: ii !<
733	INTEGER(iwp) :: j !<
734	INTEGER(iwp) :: jj !<
735	INTEGER(iwp), intent(in) :: tag !<
736
737	REAL(wp) :: fl !<
738	REAL(wp) :: fr !<
739	REAL(wp) :: myl !<
740	REAL(wp) :: myr !<
741
742	CALL MPI_BARRIER( comm2d, ierr )
743
744	IF ( myid == 0 ) THEN
745
746	!
747	!-- Number of gridpoints of the fine grid within one mesh of the coarse grid
748	dnx = ( nx_o + 1 ) / ( nx_a + 1 )
749	dny = ( ny_o + 1 ) / ( ny_a + 1 )
750
751	!
752	!-- Cyclic boundary conditions for atmosphere grid
753	total_2d_a(-nbgp:-1,:) = total_2d_a(ny+1-nbgp:ny,:)
754	total_2d_a(:,-nbgp:-1) = total_2d_a(:,nx+1-nbgp:nx)
755
756	total_2d_a(ny+1:ny+nbgp,:) = total_2d_a(0:nbgp-1,:)
757	total_2d_a(:,nx+1:nx+nbgp) = total_2d_a(:,0:nbgp-1)
758	!
759	!-- Bilinear Interpolation from atmosphere grid-layer to ocean grid-layer
760	DO j = 0, ny
761	DO i = 0, nx
762	myl = ( total_2d_a(j+1,i) - total_2d_a(j,i) ) / dny
763	myr = ( total_2d_a(j+1,i+1) - total_2d_a(j,i+1) ) / dny
764	DO jj = 0, dny-1
765	fl = myl*jj + total_2d_a(j,i)
766	fr = myr*jj + total_2d_a(j,i+1)
767	DO ii = 0, dnx-1
768	total_2d_o(jdny+jj,idnx+ii) = ( fr - fl ) / dnx * ii + fl
769	ENDDO
770	ENDDO
771	ENDDO
772	ENDDO
773	!
774	!-- Cyclic boundary conditions for ocean grid
775	total_2d_o(-nbgp:-1,:) = total_2d_o(ny_o+1-nbgp:ny_o,:)
776	total_2d_o(:,-nbgp:-1) = total_2d_o(:,nx_o+1-nbgp:nx_o)
777
778	total_2d_o(ny_o+1:ny_o+nbgp,:) = total_2d_o(0:nbgp-1,:)
779	total_2d_o(:,nx_o+1:nx_o+nbgp) = total_2d_o(:,0:nbgp-1)
780
781	CALL MPI_SEND( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
782	target_id, tag, comm_inter, ierr )
783
784	ENDIF
785
786	CALL MPI_BARRIER( comm2d, ierr )
787
788	#endif
789
790	END SUBROUTINE interpolate_to_ocean

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