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source: palm/trunk/SOURCE/surface_coupler.f90 @ 4180

Last change on this file since 4180 was 4180, checked in by scharf, 5 years ago
removed comments in 'Former revisions' section that are older than 01.01.2019
Property svn:keywords set to `Id`
File size: 30.1 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 4180 2019-08-21 14:37:54Z scharf $
27	! Modularization of all bulk cloud physics code components
28	!
29	!
30	! Description:
31	! ------------
32	!> Data exchange at the interface between coupled models
33	!------------------------------------------------------------------------------!
34	SUBROUTINE surface_coupler
35
36
37	USE arrays_3d, &
38	ONLY: pt, rho_ocean, sa, total_2d_a, total_2d_o, u, v
39
40	USE basic_constants_and_equations_mod, &
41	ONLY: c_p, l_v
42
43	USE control_parameters, &
44	ONLY: coupling_mode, coupling_mode_remote, coupling_topology, &
45	humidity, humidity_remote, land_surface, message_string, &
46	terminate_coupled, terminate_coupled_remote, &
47	time_since_reference_point, urban_surface
48
49	USE cpulog, &
50	ONLY: cpu_log, log_point
51
52	USE indices, &
53	ONLY: nbgp, nx, nxl, nxlg, nxr, nxrg, nx_a, nx_o, ny, nyn, nyng, nys, &
54	nysg, ny_a, ny_o, nzt
55
56	USE kinds
57
58	USE pegrid
59
60	USE surface_mod, &
61	ONLY : surf_def_h, surf_lsm_h, surf_type, surf_usm_h
62
63	IMPLICIT NONE
64
65	INTEGER(iwp) :: i !< index variable x-direction
66	INTEGER(iwp) :: j !< index variable y-direction
67	INTEGER(iwp) :: m !< running index for surface elements
68
69	REAL(wp) :: cpw = 4218.0_wp !< heat capacity of water at constant pressure
70	REAL(wp) :: time_since_reference_point_rem !<
71	REAL(wp) :: total_2d(-nbgp:ny+nbgp,-nbgp:nx+nbgp) !<
72
73	REAL(wp), DIMENSION(nysg:nyng,nxlg:nxrg) :: surface_flux !< dummy array for surface fluxes on 2D grid
74
75
76	#if defined( __parallel )
77
78	CALL cpu_log( log_point(39), 'surface_coupler', 'start' )
79
80
81
82	!
83	!-- In case of model termination initiated by the remote model
84	!-- (terminate_coupled_remote > 0), initiate termination of the local model.
85	!-- The rest of the coupler must then be skipped because it would cause an MPI
86	!-- intercomminucation hang.
87	!-- If necessary, the coupler will be called at the beginning of the next
88	!-- restart run.
89
90	IF ( coupling_topology == 0 ) THEN
91	CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, target_id, &
92	0, &
93	terminate_coupled_remote, 1, MPI_INTEGER, target_id, &
94	0, comm_inter, status, ierr )
95	ELSE
96	IF ( myid == 0) THEN
97	CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, &
98	target_id, 0, &
99	terminate_coupled_remote, 1, MPI_INTEGER, &
100	target_id, 0, &
101	comm_inter, status, ierr )
102	ENDIF
103	CALL MPI_BCAST( terminate_coupled_remote, 1, MPI_INTEGER, 0, comm2d, &
104	ierr )
105
106	ALLOCATE( total_2d_a(-nbgp:ny_a+nbgp,-nbgp:nx_a+nbgp), &
107	total_2d_o(-nbgp:ny_o+nbgp,-nbgp:nx_o+nbgp) )
108
109	ENDIF
110
111	IF ( terminate_coupled_remote > 0 ) THEN
112	WRITE( message_string, * ) 'remote model "', &
113	TRIM( coupling_mode_remote ), &
114	'" terminated', &
115	'&with terminate_coupled_remote = ', &
116	terminate_coupled_remote, &
117	'&local model "', TRIM( coupling_mode ), &
118	'" has', &
119	'&terminate_coupled = ', &
120	terminate_coupled
121	CALL message( 'surface_coupler', 'PA0310', 1, 2, 0, 6, 0 )
122	RETURN
123	ENDIF
124
125
126	!
127	!-- Exchange the current simulated time between the models,
128	!-- currently just for total_2d
129	IF ( coupling_topology == 0 ) THEN
130
131	CALL MPI_SEND( time_since_reference_point, 1, MPI_REAL, target_id, 11, &
132	comm_inter, ierr )
133	CALL MPI_RECV( time_since_reference_point_rem, 1, MPI_REAL, target_id, &
134	11, comm_inter, status, ierr )
135	ELSE
136
137	IF ( myid == 0 ) THEN
138
139	CALL MPI_SEND( time_since_reference_point, 1, MPI_REAL, target_id, &
140	11, comm_inter, ierr )
141	CALL MPI_RECV( time_since_reference_point_rem, 1, MPI_REAL, &
142	target_id, 11, comm_inter, status, ierr )
143
144	ENDIF
145
146	CALL MPI_BCAST( time_since_reference_point_rem, 1, MPI_REAL, 0, comm2d, &
147	ierr )
148
149	ENDIF
150
151	!
152	!-- Exchange the interface data
153	IF ( coupling_mode == 'atmosphere_to_ocean' ) THEN
154
155	!
156	!-- Horizontal grid size and number of processors is equal in ocean and
157	!-- atmosphere
158	IF ( coupling_topology == 0 ) THEN
159
160	!
161	!-- Send heat flux at bottom surface to the ocean. First, transfer from
162	!-- 1D surface type to 2D grid.
163	CALL transfer_1D_to_2D_equal( surf_def_h(0)%shf, surf_lsm_h%shf, &
164	surf_usm_h%shf )
165	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
166	12, comm_inter, ierr )
167	!
168	!-- Send humidity flux at bottom surface to the ocean. First, transfer
169	!-- from 1D surface type to 2D grid.
170	CALL transfer_1D_to_2D_equal( surf_def_h(0)%qsws, surf_lsm_h%qsws, &
171	surf_usm_h%qsws )
172	IF ( humidity ) THEN
173	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, &
174	target_id, 13, comm_inter, ierr )
175	ENDIF
176	!
177	!-- Receive temperature at the bottom surface from the ocean
178	CALL MPI_RECV( pt(0,nysg,nxlg), 1, type_xy, target_id, 14, &
179	comm_inter, status, ierr )
180	!
181	!-- Send the momentum flux (u) at bottom surface to the ocean. First,
182	!-- transfer from 1D surface type to 2D grid.
183	CALL transfer_1D_to_2D_equal( surf_def_h(0)%usws, surf_lsm_h%usws, &
184	surf_usm_h%usws )
185	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
186	15, comm_inter, ierr )
187	!
188	!-- Send the momentum flux (v) at bottom surface to the ocean. First,
189	!-- transfer from 1D surface type to 2D grid.
190	CALL transfer_1D_to_2D_equal( surf_def_h(0)%vsws, surf_lsm_h%vsws, &
191	surf_usm_h%vsws )
192	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
193	16, comm_inter, ierr )
194	!
195	!-- Receive u at the bottom surface from the ocean
196	CALL MPI_RECV( u(0,nysg,nxlg), 1, type_xy, target_id, 17, &
197	comm_inter, status, ierr )
198	!
199	!-- Receive v at the bottom surface from the ocean
200	CALL MPI_RECV( v(0,nysg,nxlg), 1, type_xy, target_id, 18, &
201	comm_inter, status, ierr )
202	!
203	!-- Horizontal grid size or number of processors differs between
204	!-- ocean and atmosphere
205	ELSE
206
207	!
208	!-- Send heat flux at bottom surface to the ocean
209	total_2d_a = 0.0_wp
210	total_2d = 0.0_wp
211	!
212	!-- Transfer from 1D surface type to 2D grid.
213	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%shf, surf_lsm_h%shf, &
214	surf_usm_h%shf )
215
216	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
217	comm2d, ierr )
218	CALL interpolate_to_ocean( 12 )
219	!
220	!-- Send humidity flux at bottom surface to the ocean
221	IF ( humidity ) THEN
222	total_2d_a = 0.0_wp
223	total_2d = 0.0_wp
224	!
225	!-- Transfer from 1D surface type to 2D grid.
226	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%qsws, &
227	surf_lsm_h%qsws, &
228	surf_usm_h%qsws )
229
230	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, &
231	0, comm2d, ierr )
232	CALL interpolate_to_ocean( 13 )
233	ENDIF
234	!
235	!-- Receive temperature at the bottom surface from the ocean
236	IF ( myid == 0 ) THEN
237	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
238	target_id, 14, comm_inter, status, ierr )
239	ENDIF
240	CALL MPI_BARRIER( comm2d, ierr )
241	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
242	ierr )
243	pt(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
244	!
245	!-- Send momentum flux (u) at bottom surface to the ocean
246	total_2d_a = 0.0_wp
247	total_2d = 0.0_wp
248	!
249	!-- Transfer from 1D surface type to 2D grid.
250	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%usws, surf_lsm_h%usws, &
251	surf_usm_h%usws )
252	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
253	comm2d, ierr )
254	CALL interpolate_to_ocean( 15 )
255	!
256	!-- Send momentum flux (v) at bottom surface to the ocean
257	total_2d_a = 0.0_wp
258	total_2d = 0.0_wp
259	!
260	!-- Transfer from 1D surface type to 2D grid.
261	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%usws, surf_lsm_h%usws, &
262	surf_usm_h%usws )
263	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
264	comm2d, ierr )
265	CALL interpolate_to_ocean( 16 )
266	!
267	!-- Receive u at the bottom surface from the ocean
268	IF ( myid == 0 ) THEN
269	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
270	target_id, 17, comm_inter, status, ierr )
271	ENDIF
272	CALL MPI_BARRIER( comm2d, ierr )
273	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
274	ierr )
275	u(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
276	!
277	!-- Receive v 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, 18, 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	v(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
286
287	ENDIF
288
289	ELSEIF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
290
291	!
292	!-- Horizontal grid size and number of processors is equal
293	!-- in ocean and atmosphere
294	IF ( coupling_topology == 0 ) THEN
295	!
296	!-- Receive heat flux at the sea surface (top) from the atmosphere
297	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 12, &
298	comm_inter, status, ierr )
299	CALL transfer_2D_to_1D_equal( surf_def_h(2)%shf )
300	!
301	!-- Receive humidity flux from the atmosphere (bottom)
302	!-- and add it to the heat flux at the sea surface (top)...
303	IF ( humidity_remote ) THEN
304	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, &
305	target_id, 13, comm_inter, status, ierr )
306	CALL transfer_2D_to_1D_equal( surf_def_h(2)%qsws )
307	ENDIF
308	!
309	!-- Send sea surface temperature to the atmosphere model
310	CALL MPI_SEND( pt(nzt,nysg,nxlg), 1, type_xy, target_id, 14, &
311	comm_inter, ierr )
312	!
313	!-- Receive momentum flux (u) at the sea surface (top) from the atmosphere
314	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 15, &
315	comm_inter, status, ierr )
316	CALL transfer_2D_to_1D_equal( surf_def_h(2)%usws )
317	!
318	!-- Receive momentum flux (v) at the sea surface (top) from the atmosphere
319	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 16, &
320	comm_inter, status, ierr )
321	CALL transfer_2D_to_1D_equal( surf_def_h(2)%vsws )
322	!
323	!-- Send u to the atmosphere
324	CALL MPI_SEND( u(nzt,nysg,nxlg), 1, type_xy, target_id, 17, &
325	comm_inter, ierr )
326	!
327	!-- Send v to the atmosphere
328	CALL MPI_SEND( v(nzt,nysg,nxlg), 1, type_xy, target_id, 18, &
329	comm_inter, ierr )
330	!
331	!-- Horizontal gridsize or number of processors differs between
332	!-- ocean and atmosphere
333	ELSE
334	!
335	!-- Receive heat flux at the sea surface (top) from the atmosphere
336	IF ( myid == 0 ) THEN
337	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
338	target_id, 12, comm_inter, status, ierr )
339	ENDIF
340	CALL MPI_BARRIER( comm2d, ierr )
341	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, &
342	ierr )
343	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%shf )
344	!
345	!-- Receive humidity flux at the sea surface (top) from the atmosphere
346	IF ( humidity_remote ) THEN
347	IF ( myid == 0 ) THEN
348	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
349	target_id, 13, comm_inter, status, ierr )
350	ENDIF
351	CALL MPI_BARRIER( comm2d, ierr )
352	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, &
353	comm2d, ierr)
354	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%qsws )
355	ENDIF
356	!
357	!-- Send surface temperature to atmosphere
358	total_2d_o = 0.0_wp
359	total_2d = 0.0_wp
360	total_2d(nys:nyn,nxl:nxr) = pt(nzt,nys:nyn,nxl:nxr)
361
362	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
363	comm2d, ierr)
364	CALL interpolate_to_atmos( 14 )
365	!
366	!-- Receive momentum flux (u) at the sea surface (top) from the atmosphere
367	IF ( myid == 0 ) THEN
368	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
369	target_id, 15, comm_inter, status, ierr )
370	ENDIF
371	CALL MPI_BARRIER( comm2d, ierr )
372	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
373	0, comm2d, ierr )
374	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%usws )
375	!
376	!-- Receive momentum flux (v) 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, 16, 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, 0, comm2d, &
383	ierr )
384	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%vsws )
385	!
386	!-- Send u to atmosphere
387	total_2d_o = 0.0_wp
388	total_2d = 0.0_wp
389	total_2d(nys:nyn,nxl:nxr) = u(nzt,nys:nyn,nxl:nxr)
390	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
391	comm2d, ierr )
392	CALL interpolate_to_atmos( 17 )
393	!
394	!-- Send v to atmosphere
395	total_2d_o = 0.0_wp
396	total_2d = 0.0_wp
397	total_2d(nys:nyn,nxl:nxr) = v(nzt,nys:nyn,nxl:nxr)
398	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
399	comm2d, ierr )
400	CALL interpolate_to_atmos( 18 )
401
402	ENDIF
403
404	!
405	!-- Conversions of fluxes received from atmosphere
406	IF ( humidity_remote ) THEN
407	!
408	!-- Here top heat flux is still the sum of atmospheric bottom heat fluxes,
409	!-- * latent heat of vaporization in m2/s2, or 540 cal/g, or 40.65 kJ/mol
410	!-- /(rho_atm(=1.0)*c_p)
411	DO m = 1, surf_def_h(2)%ns
412	i = surf_def_h(2)%i(m)
413	j = surf_def_h(2)%j(m)
414
415	surf_def_h(2)%shf(m) = surf_def_h(2)%shf(m) + &
416	surf_def_h(2)%qsws(m) * l_v / c_p
417	!
418	!-- ...and convert it to a salinity flux at the sea surface (top)
419	!-- following Steinhorn (1991), JPO 21, pp. 1681-1683:
420	!-- S'w' = -S * evaporation / ( rho_water * ( 1 - S ) )
421	surf_def_h(2)%sasws(m) = -1.0_wp * sa(nzt,j,i) * 0.001_wp * &
422	surf_def_h(2)%qsws(m) / &
423	( rho_ocean(nzt,j,i) * &
424	( 1.0_wp - sa(nzt,j,i) * 0.001_wp ) &
425	)
426	ENDDO
427	ENDIF
428
429	!
430	!-- Adjust the kinematic heat flux with respect to ocean density
431	!-- (constants are the specific heat capacities for air and water), as well
432	!-- as momentum fluxes
433	DO m = 1, surf_def_h(2)%ns
434	i = surf_def_h(2)%i(m)
435	j = surf_def_h(2)%j(m)
436	surf_def_h(2)%shf(m) = surf_def_h(2)%shf(m) / rho_ocean(nzt,j,i) * &
437	c_p / cpw
438
439	surf_def_h(2)%usws(m) = surf_def_h(2)%usws(m) / rho_ocean(nzt,j,i)
440	surf_def_h(2)%vsws(m) = surf_def_h(2)%vsws(m) / rho_ocean(nzt,j,i)
441	ENDDO
442
443	ENDIF
444
445	IF ( coupling_topology == 1 ) THEN
446	DEALLOCATE( total_2d_o, total_2d_a )
447	ENDIF
448
449	CALL cpu_log( log_point(39), 'surface_coupler', 'stop' )
450
451	#endif
452
453	CONTAINS
454
455	! Description:
456	!------------------------------------------------------------------------------!
457	!> Data transfer from 1D surface-data type to 2D dummy array for equal
458	!> grids in atmosphere and ocean.
459	!------------------------------------------------------------------------------!
460	SUBROUTINE transfer_1D_to_2D_equal( def_1d, lsm_1d, usm_1d )
461
462	IMPLICIT NONE
463
464	INTEGER(iwp) :: i !< running index x
465	INTEGER(iwp) :: j !< running index y
466	INTEGER(iwp) :: m !< running index surface type
467
468	REAL(wp), DIMENSION(1:surf_def_h(0)%ns) :: def_1d !< 1D surface flux, default surfaces
469	REAL(wp), DIMENSION(1:surf_lsm_h%ns) :: lsm_1d !< 1D surface flux, natural surfaces
470	REAL(wp), DIMENSION(1:surf_usm_h%ns) :: usm_1d !< 1D surface flux, urban surfaces
471	!
472	!-- Transfer surface flux at default surfaces to 2D grid
473	DO m = 1, surf_def_h(0)%ns
474	i = surf_def_h(0)%i(m)
475	j = surf_def_h(0)%j(m)
476	surface_flux(j,i) = def_1d(m)
477	ENDDO
478	!
479	!-- Transfer surface flux at natural surfaces to 2D grid
480	IF ( land_surface ) THEN
481	DO m = 1, SIZE(lsm_1d)
482	i = surf_lsm_h%i(m)
483	j = surf_lsm_h%j(m)
484	surface_flux(j,i) = lsm_1d(m)
485	ENDDO
486	ENDIF
487	!
488	!-- Transfer surface flux at natural surfaces to 2D grid
489	IF ( urban_surface ) THEN
490	DO m = 1, SIZE(usm_1d)
491	i = surf_usm_h%i(m)
492	j = surf_usm_h%j(m)
493	surface_flux(j,i) = usm_1d(m)
494	ENDDO
495	ENDIF
496
497	END SUBROUTINE transfer_1D_to_2D_equal
498
499	! Description:
500	!------------------------------------------------------------------------------!
501	!> Data transfer from 2D array for equal grids onto 1D surface-data type
502	!> array.
503	!------------------------------------------------------------------------------!
504	SUBROUTINE transfer_2D_to_1D_equal( def_1d )
505
506	IMPLICIT NONE
507
508	INTEGER(iwp) :: i !< running index x
509	INTEGER(iwp) :: j !< running index y
510	INTEGER(iwp) :: m !< running index surface type
511
512	REAL(wp), DIMENSION(1:surf_def_h(2)%ns) :: def_1d !< 1D surface flux, default surfaces
513	!
514	!-- Transfer surface flux to 1D surface type, only for default surfaces
515	DO m = 1, surf_def_h(2)%ns
516	i = surf_def_h(2)%i(m)
517	j = surf_def_h(2)%j(m)
518	def_1d(m) = surface_flux(j,i)
519	ENDDO
520
521	END SUBROUTINE transfer_2D_to_1D_equal
522
523	! Description:
524	!------------------------------------------------------------------------------!
525	!> Data transfer from 1D surface-data type to 2D dummy array from unequal
526	!> grids in atmosphere and ocean.
527	!------------------------------------------------------------------------------!
528	SUBROUTINE transfer_1D_to_2D_unequal( def_1d, lsm_1d, usm_1d )
529
530	IMPLICIT NONE
531
532	INTEGER(iwp) :: i !< running index x
533	INTEGER(iwp) :: j !< running index y
534	INTEGER(iwp) :: m !< running index surface type
535
536	REAL(wp), DIMENSION(1:surf_def_h(0)%ns) :: def_1d !< 1D surface flux, default surfaces
537	REAL(wp), DIMENSION(1:surf_lsm_h%ns) :: lsm_1d !< 1D surface flux, natural surfaces
538	REAL(wp), DIMENSION(1:surf_usm_h%ns) :: usm_1d !< 1D surface flux, urban surfaces
539	!
540	!-- Transfer surface flux at default surfaces to 2D grid. Transfer no
541	!-- ghost-grid points since total_2d is a global array.
542	DO m = 1, SIZE(def_1d)
543	i = surf_def_h(0)%i(m)
544	j = surf_def_h(0)%j(m)
545
546	IF ( i >= nxl .AND. i <= nxr .AND. &
547	j >= nys .AND. j <= nyn ) THEN
548	total_2d(j,i) = def_1d(m)
549	ENDIF
550	ENDDO
551	!
552	!-- Transfer surface flux at natural surfaces to 2D grid
553	IF ( land_surface ) THEN
554	DO m = 1, SIZE(lsm_1d)
555	i = surf_lsm_h%i(m)
556	j = surf_lsm_h%j(m)
557
558	IF ( i >= nxl .AND. i <= nxr .AND. &
559	j >= nys .AND. j <= nyn ) THEN
560	total_2d(j,i) = lsm_1d(m)
561	ENDIF
562	ENDDO
563	ENDIF
564	!
565	!-- Transfer surface flux at natural surfaces to 2D grid
566	IF ( urban_surface ) THEN
567	DO m = 1, SIZE(usm_1d)
568	i = surf_usm_h%i(m)
569	j = surf_usm_h%j(m)
570
571	IF ( i >= nxl .AND. i <= nxr .AND. &
572	j >= nys .AND. j <= nyn ) THEN
573	total_2d(j,i) = usm_1d(m)
574	ENDIF
575	ENDDO
576	ENDIF
577
578	END SUBROUTINE transfer_1D_to_2D_unequal
579
580	! Description:
581	!------------------------------------------------------------------------------!
582	!> Data transfer from 2D dummy array from unequal grids to 1D surface-data
583	!> type.
584	!------------------------------------------------------------------------------!
585	SUBROUTINE transfer_2D_to_1D_unequal( def_1d )
586
587	IMPLICIT NONE
588
589	INTEGER(iwp) :: i !< running index x
590	INTEGER(iwp) :: j !< running index y
591	INTEGER(iwp) :: m !< running index surface type
592
593	REAL(wp), DIMENSION(1:surf_def_h(2)%ns) :: def_1d !< 1D surface flux, default surfaces
594	!
595	!-- Transfer 2D surface flux to default surfaces data type. Transfer no
596	!-- ghost-grid points since total_2d is a global array.
597	DO m = 1, SIZE(def_1d)
598	i = surf_def_h(2)%i(m)
599	j = surf_def_h(2)%j(m)
600
601	IF ( i >= nxl .AND. i <= nxr .AND. &
602	j >= nys .AND. j <= nyn ) THEN
603	def_1d(m) = total_2d_o(j,i)
604	ENDIF
605	ENDDO
606
607
608	END SUBROUTINE transfer_2D_to_1D_unequal
609
610	END SUBROUTINE surface_coupler
611
612
613
614	!------------------------------------------------------------------------------!
615	! Description:
616	! ------------
617	!> @todo Missing subroutine description.
618	!------------------------------------------------------------------------------!
619	SUBROUTINE interpolate_to_atmos( tag )
620
621	#if defined( __parallel )
622
623	USE arrays_3d, &
624	ONLY: total_2d_a, total_2d_o
625
626	USE indices, &
627	ONLY: nbgp, nx, nx_a, nx_o, ny, ny_a, ny_o
628
629	USE kinds
630
631	USE pegrid
632
633	IMPLICIT NONE
634
635	INTEGER(iwp) :: dnx !<
636	INTEGER(iwp) :: dnx2 !<
637	INTEGER(iwp) :: dny !<
638	INTEGER(iwp) :: dny2 !<
639	INTEGER(iwp) :: i !<
640	INTEGER(iwp) :: ii !<
641	INTEGER(iwp) :: j !<
642	INTEGER(iwp) :: jj !<
643
644	INTEGER(iwp), intent(in) :: tag !<
645
646	CALL MPI_BARRIER( comm2d, ierr )
647
648	IF ( myid == 0 ) THEN
649	!
650	!-- Cyclic boundary conditions for the total 2D-grid
651	total_2d_o(-nbgp:-1,:) = total_2d_o(ny+1-nbgp:ny,:)
652	total_2d_o(:,-nbgp:-1) = total_2d_o(:,nx+1-nbgp:nx)
653
654	total_2d_o(ny+1:ny+nbgp,:) = total_2d_o(0:nbgp-1,:)
655	total_2d_o(:,nx+1:nx+nbgp) = total_2d_o(:,0:nbgp-1)
656
657	!
658	!-- Number of gridpoints of the fine grid within one mesh of the coarse grid
659	dnx = (nx_o+1) / (nx_a+1)
660	dny = (ny_o+1) / (ny_a+1)
661
662	!
663	!-- Distance for interpolation around coarse grid points within the fine
664	!-- grid (note: 2*dnx2 must not be equal with dnx)
665	dnx2 = 2 * ( dnx / 2 )
666	dny2 = 2 * ( dny / 2 )
667
668	total_2d_a = 0.0_wp
669	!
670	!-- Interpolation from ocean-grid-layer to atmosphere-grid-layer
671	DO j = 0, ny_a
672	DO i = 0, nx_a
673	DO jj = 0, dny2
674	DO ii = 0, dnx2
675	total_2d_a(j,i) = total_2d_a(j,i) &
676	+ total_2d_o(jdny+jj,idnx+ii)
677	ENDDO
678	ENDDO
679	total_2d_a(j,i) = total_2d_a(j,i) / ( ( dnx2 + 1 ) * ( dny2 + 1 ) )
680	ENDDO
681	ENDDO
682	!
683	!-- Cyclic boundary conditions for atmosphere grid
684	total_2d_a(-nbgp:-1,:) = total_2d_a(ny_a+1-nbgp:ny_a,:)
685	total_2d_a(:,-nbgp:-1) = total_2d_a(:,nx_a+1-nbgp:nx_a)
686
687	total_2d_a(ny_a+1:ny_a+nbgp,:) = total_2d_a(0:nbgp-1,:)
688	total_2d_a(:,nx_a+1:nx_a+nbgp) = total_2d_a(:,0:nbgp-1)
689	!
690	!-- Transfer of the atmosphere-grid-layer to the atmosphere
691	CALL MPI_SEND( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, target_id, &
692	tag, comm_inter, ierr )
693
694	ENDIF
695
696	CALL MPI_BARRIER( comm2d, ierr )
697
698	#endif
699
700	END SUBROUTINE interpolate_to_atmos
701
702
703	!------------------------------------------------------------------------------!
704	! Description:
705	! ------------
706	!> @todo Missing subroutine description.
707	!------------------------------------------------------------------------------!
708	SUBROUTINE interpolate_to_ocean( tag )
709
710	#if defined( __parallel )
711
712	USE arrays_3d, &
713	ONLY: total_2d_a, total_2d_o
714
715	USE indices, &
716	ONLY: nbgp, nx, nx_a, nx_o, ny, ny_a, ny_o
717
718	USE kinds
719
720	USE pegrid
721
722	IMPLICIT NONE
723
724	INTEGER(iwp) :: dnx !<
725	INTEGER(iwp) :: dny !<
726	INTEGER(iwp) :: i !<
727	INTEGER(iwp) :: ii !<
728	INTEGER(iwp) :: j !<
729	INTEGER(iwp) :: jj !<
730	INTEGER(iwp), intent(in) :: tag !<
731
732	REAL(wp) :: fl !<
733	REAL(wp) :: fr !<
734	REAL(wp) :: myl !<
735	REAL(wp) :: myr !<
736
737	CALL MPI_BARRIER( comm2d, ierr )
738
739	IF ( myid == 0 ) THEN
740
741	!
742	!-- Number of gridpoints of the fine grid within one mesh of the coarse grid
743	dnx = ( nx_o + 1 ) / ( nx_a + 1 )
744	dny = ( ny_o + 1 ) / ( ny_a + 1 )
745
746	!
747	!-- Cyclic boundary conditions for atmosphere grid
748	total_2d_a(-nbgp:-1,:) = total_2d_a(ny+1-nbgp:ny,:)
749	total_2d_a(:,-nbgp:-1) = total_2d_a(:,nx+1-nbgp:nx)
750
751	total_2d_a(ny+1:ny+nbgp,:) = total_2d_a(0:nbgp-1,:)
752	total_2d_a(:,nx+1:nx+nbgp) = total_2d_a(:,0:nbgp-1)
753	!
754	!-- Bilinear Interpolation from atmosphere grid-layer to ocean grid-layer
755	DO j = 0, ny
756	DO i = 0, nx
757	myl = ( total_2d_a(j+1,i) - total_2d_a(j,i) ) / dny
758	myr = ( total_2d_a(j+1,i+1) - total_2d_a(j,i+1) ) / dny
759	DO jj = 0, dny-1
760	fl = myl*jj + total_2d_a(j,i)
761	fr = myr*jj + total_2d_a(j,i+1)
762	DO ii = 0, dnx-1
763	total_2d_o(jdny+jj,idnx+ii) = ( fr - fl ) / dnx * ii + fl
764	ENDDO
765	ENDDO
766	ENDDO
767	ENDDO
768	!
769	!-- Cyclic boundary conditions for ocean grid
770	total_2d_o(-nbgp:-1,:) = total_2d_o(ny_o+1-nbgp:ny_o,:)
771	total_2d_o(:,-nbgp:-1) = total_2d_o(:,nx_o+1-nbgp:nx_o)
772
773	total_2d_o(ny_o+1:ny_o+nbgp,:) = total_2d_o(0:nbgp-1,:)
774	total_2d_o(:,nx_o+1:nx_o+nbgp) = total_2d_o(:,0:nbgp-1)
775
776	CALL MPI_SEND( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
777	target_id, tag, comm_inter, ierr )
778
779	ENDIF
780
781	CALL MPI_BARRIER( comm2d, ierr )
782
783	#endif
784
785	END SUBROUTINE interpolate_to_ocean

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