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source: palm/trunk/SOURCE/surface_coupler.f90 @ 4782

Last change on this file since 4782 was 4671, checked in by pavelkrc, 4 years ago
Radiative transfer model RTM version 4.1
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File size: 30.5 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 1997-2020 Leibniz Universitaet Hannover
18	!------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! ------------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: surface_coupler.f90 4671 2020-09-09 20:27:58Z gronemeier $
27	! Implementation of downward facing USM and LSM surfaces
28	!
29	! 4429 2020-02-27 15:24:30Z raasch
30	! bugfix: preprocessor directives rearranged for serial mode
31	!
32	! 4360 2020-01-07 11:25:50Z suehring
33	! Corrected "Former revisions" section
34	!
35	! 3655 2019-01-07 16:51:22Z knoop
36	! Modularization of all bulk cloud physics code components
37	!
38	! 109 2007-08-28 15:26:47Z letzel
39	! Initial revision
40	!
41	! Description:
42	! ------------
43	!> Data exchange at the interface between coupled models
44	!------------------------------------------------------------------------------!
45	SUBROUTINE surface_coupler
46	#if defined( __parallel )
47
48
49	USE arrays_3d, &
50	ONLY: pt, rho_ocean, sa, total_2d_a, total_2d_o, u, v
51
52	USE basic_constants_and_equations_mod, &
53	ONLY: c_p, l_v
54
55	USE control_parameters, &
56	ONLY: coupling_mode, coupling_mode_remote, coupling_topology, &
57	humidity, humidity_remote, land_surface, message_string, &
58	terminate_coupled, terminate_coupled_remote, &
59	time_since_reference_point, urban_surface
60
61	USE cpulog, &
62	ONLY: cpu_log, log_point
63
64	USE indices, &
65	ONLY: nbgp, nx, nxl, nxlg, nxr, nxrg, nx_a, nx_o, ny, nyn, nyng, nys, &
66	nysg, ny_a, ny_o, nzt
67
68	USE kinds
69
70	USE pegrid
71
72	USE surface_mod, &
73	ONLY : surf_def_h, surf_lsm_h, surf_type, surf_usm_h
74
75	IMPLICIT NONE
76
77	INTEGER(iwp) :: i !< index variable x-direction
78	INTEGER(iwp) :: j !< index variable y-direction
79	INTEGER(iwp) :: m !< running index for surface elements
80
81	REAL(wp) :: cpw = 4218.0_wp !< heat capacity of water at constant pressure
82	REAL(wp) :: time_since_reference_point_rem !<
83	REAL(wp) :: total_2d(-nbgp:ny+nbgp,-nbgp:nx+nbgp) !<
84
85	REAL(wp), DIMENSION(nysg:nyng,nxlg:nxrg) :: surface_flux !< dummy array for surface fluxes on 2D grid
86
87
88	CALL cpu_log( log_point(39), 'surface_coupler', 'start' )
89
90
91
92	!
93	!-- In case of model termination initiated by the remote model
94	!-- (terminate_coupled_remote > 0), initiate termination of the local model.
95	!-- The rest of the coupler must then be skipped because it would cause an MPI
96	!-- intercomminucation hang.
97	!-- If necessary, the coupler will be called at the beginning of the next
98	!-- restart run.
99
100	IF ( coupling_topology == 0 ) THEN
101	CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, target_id, &
102	0, &
103	terminate_coupled_remote, 1, MPI_INTEGER, target_id, &
104	0, comm_inter, status, ierr )
105	ELSE
106	IF ( myid == 0) THEN
107	CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, &
108	target_id, 0, &
109	terminate_coupled_remote, 1, MPI_INTEGER, &
110	target_id, 0, &
111	comm_inter, status, ierr )
112	ENDIF
113	CALL MPI_BCAST( terminate_coupled_remote, 1, MPI_INTEGER, 0, comm2d, &
114	ierr )
115
116	ALLOCATE( total_2d_a(-nbgp:ny_a+nbgp,-nbgp:nx_a+nbgp), &
117	total_2d_o(-nbgp:ny_o+nbgp,-nbgp:nx_o+nbgp) )
118
119	ENDIF
120
121	IF ( terminate_coupled_remote > 0 ) THEN
122	WRITE( message_string, * ) 'remote model "', &
123	TRIM( coupling_mode_remote ), &
124	'" terminated', &
125	'&with terminate_coupled_remote = ', &
126	terminate_coupled_remote, &
127	'&local model "', TRIM( coupling_mode ), &
128	'" has', &
129	'&terminate_coupled = ', &
130	terminate_coupled
131	CALL message( 'surface_coupler', 'PA0310', 1, 2, 0, 6, 0 )
132	RETURN
133	ENDIF
134
135
136	!
137	!-- Exchange the current simulated time between the models,
138	!-- currently just for total_2d
139	IF ( coupling_topology == 0 ) THEN
140
141	CALL MPI_SEND( time_since_reference_point, 1, MPI_REAL, target_id, 11, &
142	comm_inter, ierr )
143	CALL MPI_RECV( time_since_reference_point_rem, 1, MPI_REAL, target_id, &
144	11, comm_inter, status, ierr )
145	ELSE
146
147	IF ( myid == 0 ) THEN
148
149	CALL MPI_SEND( time_since_reference_point, 1, MPI_REAL, target_id, &
150	11, comm_inter, ierr )
151	CALL MPI_RECV( time_since_reference_point_rem, 1, MPI_REAL, &
152	target_id, 11, comm_inter, status, ierr )
153
154	ENDIF
155
156	CALL MPI_BCAST( time_since_reference_point_rem, 1, MPI_REAL, 0, comm2d, &
157	ierr )
158
159	ENDIF
160
161	!
162	!-- Exchange the interface data
163	IF ( coupling_mode == 'atmosphere_to_ocean' ) THEN
164
165	!
166	!-- Horizontal grid size and number of processors is equal in ocean and
167	!-- atmosphere
168	IF ( coupling_topology == 0 ) THEN
169
170	!
171	!-- Send heat flux at bottom surface to the ocean. First, transfer from
172	!-- 1D surface type to 2D grid.
173	CALL transfer_1D_to_2D_equal( surf_def_h(0)%shf, surf_lsm_h(0)%shf, &
174	surf_usm_h(0)%shf )
175	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
176	12, comm_inter, ierr )
177	!
178	!-- Send humidity flux at bottom surface to the ocean. First, transfer
179	!-- from 1D surface type to 2D grid.
180	CALL transfer_1D_to_2D_equal( surf_def_h(0)%qsws, surf_lsm_h(0)%qsws, &
181	surf_usm_h(0)%qsws )
182	IF ( humidity ) THEN
183	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, &
184	target_id, 13, comm_inter, ierr )
185	ENDIF
186	!
187	!-- Receive temperature at the bottom surface from the ocean
188	CALL MPI_RECV( pt(0,nysg,nxlg), 1, type_xy, target_id, 14, &
189	comm_inter, status, ierr )
190	!
191	!-- Send the momentum flux (u) at bottom surface to the ocean. First,
192	!-- transfer from 1D surface type to 2D grid.
193	CALL transfer_1D_to_2D_equal( surf_def_h(0)%usws, surf_lsm_h(0)%usws, &
194	surf_usm_h(0)%usws )
195	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
196	15, comm_inter, ierr )
197	!
198	!-- Send the momentum flux (v) at bottom surface to the ocean. First,
199	!-- transfer from 1D surface type to 2D grid.
200	CALL transfer_1D_to_2D_equal( surf_def_h(0)%vsws, surf_lsm_h(0)%vsws, &
201	surf_usm_h(0)%vsws )
202	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
203	16, comm_inter, ierr )
204	!
205	!-- Receive u at the bottom surface from the ocean
206	CALL MPI_RECV( u(0,nysg,nxlg), 1, type_xy, target_id, 17, &
207	comm_inter, status, ierr )
208	!
209	!-- Receive v at the bottom surface from the ocean
210	CALL MPI_RECV( v(0,nysg,nxlg), 1, type_xy, target_id, 18, &
211	comm_inter, status, ierr )
212	!
213	!-- Horizontal grid size or number of processors differs between
214	!-- ocean and atmosphere
215	ELSE
216
217	!
218	!-- Send heat flux at bottom surface to the ocean
219	total_2d_a = 0.0_wp
220	total_2d = 0.0_wp
221	!
222	!-- Transfer from 1D surface type to 2D grid.
223	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%shf, surf_lsm_h(0)%shf, &
224	surf_usm_h(0)%shf )
225
226	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
227	comm2d, ierr )
228	CALL interpolate_to_ocean( 12 )
229	!
230	!-- Send humidity flux at bottom surface to the ocean
231	IF ( humidity ) THEN
232	total_2d_a = 0.0_wp
233	total_2d = 0.0_wp
234	!
235	!-- Transfer from 1D surface type to 2D grid.
236	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%qsws, &
237	surf_lsm_h(0)%qsws, &
238	surf_usm_h(0)%qsws )
239
240	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, &
241	0, comm2d, ierr )
242	CALL interpolate_to_ocean( 13 )
243	ENDIF
244	!
245	!-- Receive temperature at the bottom surface from the ocean
246	IF ( myid == 0 ) THEN
247	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
248	target_id, 14, comm_inter, status, ierr )
249	ENDIF
250	CALL MPI_BARRIER( comm2d, ierr )
251	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
252	ierr )
253	pt(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
254	!
255	!-- Send momentum flux (u) at bottom surface to the ocean
256	total_2d_a = 0.0_wp
257	total_2d = 0.0_wp
258	!
259	!-- Transfer from 1D surface type to 2D grid.
260	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%usws, surf_lsm_h(0)%usws, &
261	surf_usm_h(0)%usws )
262	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
263	comm2d, ierr )
264	CALL interpolate_to_ocean( 15 )
265	!
266	!-- Send momentum flux (v) at bottom surface to the ocean
267	total_2d_a = 0.0_wp
268	total_2d = 0.0_wp
269	!
270	!-- Transfer from 1D surface type to 2D grid.
271	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%usws, surf_lsm_h(0)%usws, &
272	surf_usm_h(0)%usws )
273	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
274	comm2d, ierr )
275	CALL interpolate_to_ocean( 16 )
276	!
277	!-- Receive u at the bottom surface from the ocean
278	IF ( myid == 0 ) THEN
279	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
280	target_id, 17, comm_inter, status, ierr )
281	ENDIF
282	CALL MPI_BARRIER( comm2d, ierr )
283	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
284	ierr )
285	u(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
286	!
287	!-- Receive v at the bottom surface from the ocean
288	IF ( myid == 0 ) THEN
289	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
290	target_id, 18, comm_inter, status, ierr )
291	ENDIF
292	CALL MPI_BARRIER( comm2d, ierr )
293	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
294	ierr )
295	v(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
296
297	ENDIF
298
299	ELSEIF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
300
301	!
302	!-- Horizontal grid size and number of processors is equal
303	!-- in ocean and atmosphere
304	IF ( coupling_topology == 0 ) THEN
305	!
306	!-- Receive heat flux at the sea surface (top) from the atmosphere
307	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 12, &
308	comm_inter, status, ierr )
309	CALL transfer_2D_to_1D_equal( surf_def_h(2)%shf )
310	!
311	!-- Receive humidity flux from the atmosphere (bottom)
312	!-- and add it to the heat flux at the sea surface (top)...
313	IF ( humidity_remote ) THEN
314	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, &
315	target_id, 13, comm_inter, status, ierr )
316	CALL transfer_2D_to_1D_equal( surf_def_h(2)%qsws )
317	ENDIF
318	!
319	!-- Send sea surface temperature to the atmosphere model
320	CALL MPI_SEND( pt(nzt,nysg,nxlg), 1, type_xy, target_id, 14, &
321	comm_inter, ierr )
322	!
323	!-- Receive momentum flux (u) at the sea surface (top) from the atmosphere
324	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 15, &
325	comm_inter, status, ierr )
326	CALL transfer_2D_to_1D_equal( surf_def_h(2)%usws )
327	!
328	!-- Receive momentum flux (v) at the sea surface (top) from the atmosphere
329	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 16, &
330	comm_inter, status, ierr )
331	CALL transfer_2D_to_1D_equal( surf_def_h(2)%vsws )
332	!
333	!-- Send u to the atmosphere
334	CALL MPI_SEND( u(nzt,nysg,nxlg), 1, type_xy, target_id, 17, &
335	comm_inter, ierr )
336	!
337	!-- Send v to the atmosphere
338	CALL MPI_SEND( v(nzt,nysg,nxlg), 1, type_xy, target_id, 18, &
339	comm_inter, ierr )
340	!
341	!-- Horizontal gridsize or number of processors differs between
342	!-- ocean and atmosphere
343	ELSE
344	!
345	!-- Receive heat flux at the sea surface (top) from the atmosphere
346	IF ( myid == 0 ) THEN
347	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
348	target_id, 12, comm_inter, status, ierr )
349	ENDIF
350	CALL MPI_BARRIER( comm2d, ierr )
351	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, &
352	ierr )
353	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%shf )
354	!
355	!-- Receive humidity flux at the sea surface (top) from the atmosphere
356	IF ( humidity_remote ) THEN
357	IF ( myid == 0 ) THEN
358	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
359	target_id, 13, comm_inter, status, ierr )
360	ENDIF
361	CALL MPI_BARRIER( comm2d, ierr )
362	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, &
363	comm2d, ierr)
364	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%qsws )
365	ENDIF
366	!
367	!-- Send surface temperature to atmosphere
368	total_2d_o = 0.0_wp
369	total_2d = 0.0_wp
370	total_2d(nys:nyn,nxl:nxr) = pt(nzt,nys:nyn,nxl:nxr)
371
372	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
373	comm2d, ierr)
374	CALL interpolate_to_atmos( 14 )
375	!
376	!-- Receive momentum flux (u) at the sea surface (top) from the atmosphere
377	IF ( myid == 0 ) THEN
378	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
379	target_id, 15, comm_inter, status, ierr )
380	ENDIF
381	CALL MPI_BARRIER( comm2d, ierr )
382	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
383	0, comm2d, ierr )
384	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%usws )
385	!
386	!-- Receive momentum flux (v) at the sea surface (top) from the atmosphere
387	IF ( myid == 0 ) THEN
388	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
389	target_id, 16, comm_inter, status, ierr )
390	ENDIF
391	CALL MPI_BARRIER( comm2d, ierr )
392	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, &
393	ierr )
394	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%vsws )
395	!
396	!-- Send u to atmosphere
397	total_2d_o = 0.0_wp
398	total_2d = 0.0_wp
399	total_2d(nys:nyn,nxl:nxr) = u(nzt,nys:nyn,nxl:nxr)
400	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
401	comm2d, ierr )
402	CALL interpolate_to_atmos( 17 )
403	!
404	!-- Send v to atmosphere
405	total_2d_o = 0.0_wp
406	total_2d = 0.0_wp
407	total_2d(nys:nyn,nxl:nxr) = v(nzt,nys:nyn,nxl:nxr)
408	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
409	comm2d, ierr )
410	CALL interpolate_to_atmos( 18 )
411
412	ENDIF
413
414	!
415	!-- Conversions of fluxes received from atmosphere
416	IF ( humidity_remote ) THEN
417	!
418	!-- Here top heat flux is still the sum of atmospheric bottom heat fluxes,
419	!-- * latent heat of vaporization in m2/s2, or 540 cal/g, or 40.65 kJ/mol
420	!-- /(rho_atm(=1.0)*c_p)
421	DO m = 1, surf_def_h(2)%ns
422	i = surf_def_h(2)%i(m)
423	j = surf_def_h(2)%j(m)
424
425	surf_def_h(2)%shf(m) = surf_def_h(2)%shf(m) + &
426	surf_def_h(2)%qsws(m) * l_v / c_p
427	!
428	!-- ...and convert it to a salinity flux at the sea surface (top)
429	!-- following Steinhorn (1991), JPO 21, pp. 1681-1683:
430	!-- S'w' = -S * evaporation / ( rho_water * ( 1 - S ) )
431	surf_def_h(2)%sasws(m) = -1.0_wp * sa(nzt,j,i) * 0.001_wp * &
432	surf_def_h(2)%qsws(m) / &
433	( rho_ocean(nzt,j,i) * &
434	( 1.0_wp - sa(nzt,j,i) * 0.001_wp ) &
435	)
436	ENDDO
437	ENDIF
438
439	!
440	!-- Adjust the kinematic heat flux with respect to ocean density
441	!-- (constants are the specific heat capacities for air and water), as well
442	!-- as momentum fluxes
443	DO m = 1, surf_def_h(2)%ns
444	i = surf_def_h(2)%i(m)
445	j = surf_def_h(2)%j(m)
446	surf_def_h(2)%shf(m) = surf_def_h(2)%shf(m) / rho_ocean(nzt,j,i) * &
447	c_p / cpw
448
449	surf_def_h(2)%usws(m) = surf_def_h(2)%usws(m) / rho_ocean(nzt,j,i)
450	surf_def_h(2)%vsws(m) = surf_def_h(2)%vsws(m) / rho_ocean(nzt,j,i)
451	ENDDO
452
453	ENDIF
454
455	IF ( coupling_topology == 1 ) THEN
456	DEALLOCATE( total_2d_o, total_2d_a )
457	ENDIF
458
459	CALL cpu_log( log_point(39), 'surface_coupler', 'stop' )
460
461
462	CONTAINS
463
464	! Description:
465	!------------------------------------------------------------------------------!
466	!> Data transfer from 1D surface-data type to 2D dummy array for equal
467	!> grids in atmosphere and ocean.
468	!------------------------------------------------------------------------------!
469	SUBROUTINE transfer_1D_to_2D_equal( def_1d, lsm_1d, usm_1d )
470
471	IMPLICIT NONE
472
473	INTEGER(iwp) :: i !< running index x
474	INTEGER(iwp) :: j !< running index y
475	INTEGER(iwp) :: m !< running index surface type
476
477	REAL(wp), DIMENSION(1:surf_def_h(0)%ns) :: def_1d !< 1D surface flux, default surfaces
478	REAL(wp), DIMENSION(1:surf_lsm_h(0)%ns) :: lsm_1d !< 1D surface flux, natural surfaces
479	REAL(wp), DIMENSION(1:surf_usm_h(0)%ns) :: usm_1d !< 1D surface flux, urban surfaces
480	!
481	!-- Transfer surface flux at default surfaces to 2D grid
482	DO m = 1, surf_def_h(0)%ns
483	i = surf_def_h(0)%i(m)
484	j = surf_def_h(0)%j(m)
485	surface_flux(j,i) = def_1d(m)
486	ENDDO
487	!
488	!-- Transfer surface flux at natural surfaces to 2D grid
489	IF ( land_surface ) THEN
490	DO m = 1, SIZE(lsm_1d)
491	i = surf_lsm_h(0)%i(m)
492	j = surf_lsm_h(0)%j(m)
493	surface_flux(j,i) = lsm_1d(m)
494	ENDDO
495	ENDIF
496	!
497	!-- Transfer surface flux at natural surfaces to 2D grid
498	IF ( urban_surface ) THEN
499	DO m = 1, SIZE(usm_1d)
500	i = surf_usm_h(0)%i(m)
501	j = surf_usm_h(0)%j(m)
502	surface_flux(j,i) = usm_1d(m)
503	ENDDO
504	ENDIF
505
506	END SUBROUTINE transfer_1D_to_2D_equal
507
508	! Description:
509	!------------------------------------------------------------------------------!
510	!> Data transfer from 2D array for equal grids onto 1D surface-data type
511	!> array.
512	!------------------------------------------------------------------------------!
513	SUBROUTINE transfer_2D_to_1D_equal( def_1d )
514
515	IMPLICIT NONE
516
517	INTEGER(iwp) :: i !< running index x
518	INTEGER(iwp) :: j !< running index y
519	INTEGER(iwp) :: m !< running index surface type
520
521	REAL(wp), DIMENSION(1:surf_def_h(2)%ns) :: def_1d !< 1D surface flux, default surfaces
522	!
523	!-- Transfer surface flux to 1D surface type, only for default surfaces
524	DO m = 1, surf_def_h(2)%ns
525	i = surf_def_h(2)%i(m)
526	j = surf_def_h(2)%j(m)
527	def_1d(m) = surface_flux(j,i)
528	ENDDO
529
530	END SUBROUTINE transfer_2D_to_1D_equal
531
532	! Description:
533	!------------------------------------------------------------------------------!
534	!> Data transfer from 1D surface-data type to 2D dummy array from unequal
535	!> grids in atmosphere and ocean.
536	!------------------------------------------------------------------------------!
537	SUBROUTINE transfer_1D_to_2D_unequal( def_1d, lsm_1d, usm_1d )
538
539	IMPLICIT NONE
540
541	INTEGER(iwp) :: i !< running index x
542	INTEGER(iwp) :: j !< running index y
543	INTEGER(iwp) :: m !< running index surface type
544
545	REAL(wp), DIMENSION(1:surf_def_h(0)%ns) :: def_1d !< 1D surface flux, default surfaces
546	REAL(wp), DIMENSION(1:surf_lsm_h(0)%ns) :: lsm_1d !< 1D surface flux, natural surfaces
547	REAL(wp), DIMENSION(1:surf_usm_h(0)%ns) :: usm_1d !< 1D surface flux, urban surfaces
548	!
549	!-- Transfer surface flux at default surfaces to 2D grid. Transfer no
550	!-- ghost-grid points since total_2d is a global array.
551	DO m = 1, SIZE(def_1d)
552	i = surf_def_h(0)%i(m)
553	j = surf_def_h(0)%j(m)
554
555	IF ( i >= nxl .AND. i <= nxr .AND. &
556	j >= nys .AND. j <= nyn ) THEN
557	total_2d(j,i) = def_1d(m)
558	ENDIF
559	ENDDO
560	!
561	!-- Transfer surface flux at natural surfaces to 2D grid
562	IF ( land_surface ) THEN
563	DO m = 1, SIZE(lsm_1d)
564	i = surf_lsm_h(0)%i(m)
565	j = surf_lsm_h(0)%j(m)
566
567	IF ( i >= nxl .AND. i <= nxr .AND. &
568	j >= nys .AND. j <= nyn ) THEN
569	total_2d(j,i) = lsm_1d(m)
570	ENDIF
571	ENDDO
572	ENDIF
573	!
574	!-- Transfer surface flux at natural surfaces to 2D grid
575	IF ( urban_surface ) THEN
576	DO m = 1, SIZE(usm_1d)
577	i = surf_usm_h(0)%i(m)
578	j = surf_usm_h(0)%j(m)
579
580	IF ( i >= nxl .AND. i <= nxr .AND. &
581	j >= nys .AND. j <= nyn ) THEN
582	total_2d(j,i) = usm_1d(m)
583	ENDIF
584	ENDDO
585	ENDIF
586
587	END SUBROUTINE transfer_1D_to_2D_unequal
588
589	! Description:
590	!------------------------------------------------------------------------------!
591	!> Data transfer from 2D dummy array from unequal grids to 1D surface-data
592	!> type.
593	!------------------------------------------------------------------------------!
594	SUBROUTINE transfer_2D_to_1D_unequal( def_1d )
595
596	IMPLICIT NONE
597
598	INTEGER(iwp) :: i !< running index x
599	INTEGER(iwp) :: j !< running index y
600	INTEGER(iwp) :: m !< running index surface type
601
602	REAL(wp), DIMENSION(1:surf_def_h(2)%ns) :: def_1d !< 1D surface flux, default surfaces
603	!
604	!-- Transfer 2D surface flux to default surfaces data type. Transfer no
605	!-- ghost-grid points since total_2d is a global array.
606	DO m = 1, SIZE(def_1d)
607	i = surf_def_h(2)%i(m)
608	j = surf_def_h(2)%j(m)
609
610	IF ( i >= nxl .AND. i <= nxr .AND. &
611	j >= nys .AND. j <= nyn ) THEN
612	def_1d(m) = total_2d_o(j,i)
613	ENDIF
614	ENDDO
615
616
617	END SUBROUTINE transfer_2D_to_1D_unequal
618
619	#endif
620	END SUBROUTINE surface_coupler
621
622
623
624	!------------------------------------------------------------------------------!
625	! Description:
626	! ------------
627	!> @todo Missing subroutine description.
628	!------------------------------------------------------------------------------!
629	#if defined( __parallel )
630
631	SUBROUTINE interpolate_to_atmos( tag )
632
633	USE arrays_3d, &
634	ONLY: total_2d_a, total_2d_o
635
636	USE indices, &
637	ONLY: nbgp, nx, nx_a, nx_o, ny, ny_a, ny_o
638
639	USE kinds
640
641	USE pegrid
642
643	IMPLICIT NONE
644
645	INTEGER(iwp) :: dnx !<
646	INTEGER(iwp) :: dnx2 !<
647	INTEGER(iwp) :: dny !<
648	INTEGER(iwp) :: dny2 !<
649	INTEGER(iwp) :: i !<
650	INTEGER(iwp) :: ii !<
651	INTEGER(iwp) :: j !<
652	INTEGER(iwp) :: jj !<
653
654	INTEGER(iwp), intent(in) :: tag !<
655
656	CALL MPI_BARRIER( comm2d, ierr )
657
658	IF ( myid == 0 ) THEN
659	!
660	!-- Cyclic boundary conditions for the total 2D-grid
661	total_2d_o(-nbgp:-1,:) = total_2d_o(ny+1-nbgp:ny,:)
662	total_2d_o(:,-nbgp:-1) = total_2d_o(:,nx+1-nbgp:nx)
663
664	total_2d_o(ny+1:ny+nbgp,:) = total_2d_o(0:nbgp-1,:)
665	total_2d_o(:,nx+1:nx+nbgp) = total_2d_o(:,0:nbgp-1)
666
667	!
668	!-- Number of gridpoints of the fine grid within one mesh of the coarse grid
669	dnx = (nx_o+1) / (nx_a+1)
670	dny = (ny_o+1) / (ny_a+1)
671
672	!
673	!-- Distance for interpolation around coarse grid points within the fine
674	!-- grid (note: 2*dnx2 must not be equal with dnx)
675	dnx2 = 2 * ( dnx / 2 )
676	dny2 = 2 * ( dny / 2 )
677
678	total_2d_a = 0.0_wp
679	!
680	!-- Interpolation from ocean-grid-layer to atmosphere-grid-layer
681	DO j = 0, ny_a
682	DO i = 0, nx_a
683	DO jj = 0, dny2
684	DO ii = 0, dnx2
685	total_2d_a(j,i) = total_2d_a(j,i) &
686	+ total_2d_o(jdny+jj,idnx+ii)
687	ENDDO
688	ENDDO
689	total_2d_a(j,i) = total_2d_a(j,i) / ( ( dnx2 + 1 ) * ( dny2 + 1 ) )
690	ENDDO
691	ENDDO
692	!
693	!-- Cyclic boundary conditions for atmosphere grid
694	total_2d_a(-nbgp:-1,:) = total_2d_a(ny_a+1-nbgp:ny_a,:)
695	total_2d_a(:,-nbgp:-1) = total_2d_a(:,nx_a+1-nbgp:nx_a)
696
697	total_2d_a(ny_a+1:ny_a+nbgp,:) = total_2d_a(0:nbgp-1,:)
698	total_2d_a(:,nx_a+1:nx_a+nbgp) = total_2d_a(:,0:nbgp-1)
699	!
700	!-- Transfer of the atmosphere-grid-layer to the atmosphere
701	CALL MPI_SEND( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, target_id, &
702	tag, comm_inter, ierr )
703
704	ENDIF
705
706	CALL MPI_BARRIER( comm2d, ierr )
707
708	END SUBROUTINE interpolate_to_atmos
709
710	#endif
711
712
713	!------------------------------------------------------------------------------!
714	! Description:
715	! ------------
716	!> @todo Missing subroutine description.
717	!------------------------------------------------------------------------------!
718	#if defined( __parallel )
719
720	SUBROUTINE interpolate_to_ocean( tag )
721
722	USE arrays_3d, &
723	ONLY: total_2d_a, total_2d_o
724
725	USE indices, &
726	ONLY: nbgp, nx, nx_a, nx_o, ny, ny_a, ny_o
727
728	USE kinds
729
730	USE pegrid
731
732	IMPLICIT NONE
733
734	INTEGER(iwp) :: dnx !<
735	INTEGER(iwp) :: dny !<
736	INTEGER(iwp) :: i !<
737	INTEGER(iwp) :: ii !<
738	INTEGER(iwp) :: j !<
739	INTEGER(iwp) :: jj !<
740	INTEGER(iwp), intent(in) :: tag !<
741
742	REAL(wp) :: fl !<
743	REAL(wp) :: fr !<
744	REAL(wp) :: myl !<
745	REAL(wp) :: myr !<
746
747	CALL MPI_BARRIER( comm2d, ierr )
748
749	IF ( myid == 0 ) THEN
750
751	!
752	!-- Number of gridpoints of the fine grid within one mesh of the coarse grid
753	dnx = ( nx_o + 1 ) / ( nx_a + 1 )
754	dny = ( ny_o + 1 ) / ( ny_a + 1 )
755
756	!
757	!-- Cyclic boundary conditions for atmosphere grid
758	total_2d_a(-nbgp:-1,:) = total_2d_a(ny+1-nbgp:ny,:)
759	total_2d_a(:,-nbgp:-1) = total_2d_a(:,nx+1-nbgp:nx)
760
761	total_2d_a(ny+1:ny+nbgp,:) = total_2d_a(0:nbgp-1,:)
762	total_2d_a(:,nx+1:nx+nbgp) = total_2d_a(:,0:nbgp-1)
763	!
764	!-- Bilinear Interpolation from atmosphere grid-layer to ocean grid-layer
765	DO j = 0, ny
766	DO i = 0, nx
767	myl = ( total_2d_a(j+1,i) - total_2d_a(j,i) ) / dny
768	myr = ( total_2d_a(j+1,i+1) - total_2d_a(j,i+1) ) / dny
769	DO jj = 0, dny-1
770	fl = myl*jj + total_2d_a(j,i)
771	fr = myr*jj + total_2d_a(j,i+1)
772	DO ii = 0, dnx-1
773	total_2d_o(jdny+jj,idnx+ii) = ( fr - fl ) / dnx * ii + fl
774	ENDDO
775	ENDDO
776	ENDDO
777	ENDDO
778	!
779	!-- Cyclic boundary conditions for ocean grid
780	total_2d_o(-nbgp:-1,:) = total_2d_o(ny_o+1-nbgp:ny_o,:)
781	total_2d_o(:,-nbgp:-1) = total_2d_o(:,nx_o+1-nbgp:nx_o)
782
783	total_2d_o(ny_o+1:ny_o+nbgp,:) = total_2d_o(0:nbgp-1,:)
784	total_2d_o(:,nx_o+1:nx_o+nbgp) = total_2d_o(:,0:nbgp-1)
785
786	CALL MPI_SEND( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
787	target_id, tag, comm_inter, ierr )
788
789	ENDIF
790
791	CALL MPI_BARRIER( comm2d, ierr )
792
793	END SUBROUTINE interpolate_to_ocean
794
795	#endif

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