Home

Context Navigation

source: palm/trunk/SOURCE/surface_coupler.f90 @ 1427

Last change on this file since 1427 was 1427, checked in by maronga, 10 years ago
bugfix in surface coupler
Property svn:keywords set to `Id`
File size: 21.8 KB

Rev	Line
[102]	1	SUBROUTINE surface_coupler
	2
[1036]	3	!--------------------------------------------------------------------------------!
	4	! This file is part of PALM.
	5	!
	6	! PALM is free software: you can redistribute it and/or modify it under the terms
	7	! of the GNU General Public License as published by the Free Software Foundation,
	8	! either version 3 of the License, or (at your option) any later 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	!
[1310]	17	! Copyright 1997-2014 Leibniz Universitaet Hannover
[1036]	18	!--------------------------------------------------------------------------------!
	19	!
[258]	20	! Current revisions:
[1092]	21	! ------------------
[1427]	22	! Bugfix: value of l_v corrected.
[1321]	23	!
	24	! Former revisions:
	25	! -----------------
	26	! $Id: surface_coupler.f90 1427 2014-07-07 14:04:59Z maronga $
	27	!
[1419]	28	! 1418 2014-06-06 13:05:08Z fricke
	29	! Bugfix: For caluclation of the salinity flux at the sea surface,
	30	! the given value for salinity must be in percent and not in psu
	31	!
[1354]	32	! 1353 2014-04-08 15:21:23Z heinze
	33	! REAL constants provided with KIND-attribute
	34	!
[1325]	35	! 1324 2014-03-21 09:13:16Z suehring
	36	! Bugfix: ONLY statement for module pegrid removed
	37	!
[1323]	38	! 1322 2014-03-20 16:38:49Z raasch
	39	! REAL constants defined as wp-kind
	40	!
[1321]	41	! 1320 2014-03-20 08:40:49Z raasch
[1320]	42	! ONLY-attribute added to USE-statements,
	43	! kind-parameters added to all INTEGER and REAL declaration statements,
	44	! kinds are defined in new module kinds,
	45	! old module precision_kind is removed,
	46	! revision history before 2012 removed,
	47	! comment fields (!:) to be used for variable explanations added to
	48	! all variable declaration statements
[102]	49	!
[1319]	50	! 1318 2014-03-17 13:35:16Z raasch
	51	! module interfaces removed
	52	!
[1093]	53	! 1092 2013-02-02 11:24:22Z raasch
	54	! unused variables removed
	55	!
[1037]	56	! 1036 2012-10-22 13:43:42Z raasch
	57	! code put under GPL (PALM 3.9)
	58	!
[881]	59	! 880 2012-04-13 06:28:59Z raasch
	60	! Bugfix: preprocessor statements for parallel execution added
	61	!
[110]	62	! 109 2007-08-28 15:26:47Z letzel
[102]	63	! Initial revision
	64	!
	65	! Description:
	66	! ------------
	67	! Data exchange at the interface between coupled models
	68	!------------------------------------------------------------------------------!
	69
[1320]	70	USE arrays_3d, &
	71	ONLY: pt, shf, qsws, qswst_remote, rho, sa, saswst, total_2d_a, &
	72	total_2d_o, tswst, u, usws, uswst, v, vsws, vswst
	73
[1427]	74	USE cloud_parameters, &
	75	ONLY: cp, l_v
	76
[1320]	77	USE control_parameters, &
	78	ONLY: coupling_mode, coupling_mode_remote, coupling_topology, &
	79	humidity, humidity_remote, message_string, terminate_coupled, &
	80	terminate_coupled_remote, time_since_reference_point
	81
	82	USE cpulog, &
	83	ONLY: cpu_log, log_point
	84
	85	USE indices, &
	86	ONLY: nbgp, nx, nxl, nxlg, nxr, nxrg, nx_a, nx_o, ny, nyn, nyng, nys, &
	87	nysg, ny_a, ny_o, nzt
	88
	89	USE kinds
	90
[102]	91	USE pegrid
	92
	93	IMPLICIT NONE
	94
[1320]	95	REAL(wp) :: time_since_reference_point_rem !:
	96	REAL(wp) :: total_2d(-nbgp:ny+nbgp,-nbgp:nx+nbgp) !:
[102]	97
[1427]	98	REAL(wp) :: cpw = 4218.0_wp !: heat capacity of water at constant pressure
	99
[206]	100	#if defined( __parallel )
[102]	101
[667]	102	CALL cpu_log( log_point(39), 'surface_coupler', 'start' )
[102]	103
[667]	104
	105
[102]	106	!
[108]	107	!-- In case of model termination initiated by the remote model
	108	!-- (terminate_coupled_remote > 0), initiate termination of the local model.
	109	!-- The rest of the coupler must then be skipped because it would cause an MPI
	110	!-- intercomminucation hang.
	111	!-- If necessary, the coupler will be called at the beginning of the next
	112	!-- restart run.
[667]	113
	114	IF ( coupling_topology == 0 ) THEN
[709]	115	CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, target_id, &
	116	0, &
	117	terminate_coupled_remote, 1, MPI_INTEGER, target_id, &
[667]	118	0, comm_inter, status, ierr )
	119	ELSE
	120	IF ( myid == 0) THEN
	121	CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, &
	122	target_id, 0, &
	123	terminate_coupled_remote, 1, MPI_INTEGER, &
	124	target_id, 0, &
	125	comm_inter, status, ierr )
	126	ENDIF
[709]	127	CALL MPI_BCAST( terminate_coupled_remote, 1, MPI_INTEGER, 0, comm2d, &
	128	ierr )
[667]	129
	130	ALLOCATE( total_2d_a(-nbgp:ny_a+nbgp,-nbgp:nx_a+nbgp), &
	131	total_2d_o(-nbgp:ny_o+nbgp,-nbgp:nx_o+nbgp) )
	132
	133	ENDIF
	134
[108]	135	IF ( terminate_coupled_remote > 0 ) THEN
[274]	136	WRITE( message_string, * ) 'remote model "', &
	137	TRIM( coupling_mode_remote ), &
	138	'" terminated', &
	139	'&with terminate_coupled_remote = ', &
	140	terminate_coupled_remote, &
	141	'&local model "', TRIM( coupling_mode ), &
	142	'" has', &
	143	'&terminate_coupled = ', &
[667]	144	terminate_coupled
[258]	145	CALL message( 'surface_coupler', 'PA0310', 1, 2, 0, 6, 0 )
[108]	146	RETURN
	147	ENDIF
[667]	148
[291]	149
[108]	150	!
	151	!-- Exchange the current simulated time between the models,
[667]	152	!-- currently just for total_2ding
[709]	153	IF ( coupling_topology == 0 ) THEN
	154
	155	CALL MPI_SEND( time_since_reference_point, 1, MPI_REAL, target_id, 11, &
	156	comm_inter, ierr )
	157	CALL MPI_RECV( time_since_reference_point_rem, 1, MPI_REAL, target_id, &
	158	11, comm_inter, status, ierr )
[667]	159	ELSE
[709]	160
[667]	161	IF ( myid == 0 ) THEN
[709]	162
	163	CALL MPI_SEND( time_since_reference_point, 1, MPI_REAL, target_id, &
	164	11, comm_inter, ierr )
	165	CALL MPI_RECV( time_since_reference_point_rem, 1, MPI_REAL, &
[667]	166	target_id, 11, comm_inter, status, ierr )
[709]	167
[667]	168	ENDIF
[709]	169
	170	CALL MPI_BCAST( time_since_reference_point_rem, 1, MPI_REAL, 0, comm2d, &
	171	ierr )
	172
[667]	173	ENDIF
[102]	174
	175	!
	176	!-- Exchange the interface data
	177	IF ( coupling_mode == 'atmosphere_to_ocean' ) THEN
[667]	178
	179	!
[709]	180	!-- Horizontal grid size and number of processors is equal in ocean and
	181	!-- atmosphere
	182	IF ( coupling_topology == 0 ) THEN
[102]	183
	184	!
[709]	185	!-- Send heat flux at bottom surface to the ocean
	186	CALL MPI_SEND( shf(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 12, &
	187	comm_inter, ierr )
[102]	188	!
[709]	189	!-- Send humidity flux at bottom surface to the ocean
[667]	190	IF ( humidity ) THEN
[709]	191	CALL MPI_SEND( qsws(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 13, &
	192	comm_inter, ierr )
[667]	193	ENDIF
	194	!
[709]	195	!-- Receive temperature at the bottom surface from the ocean
	196	CALL MPI_RECV( pt(0,nysg,nxlg), 1, type_xy, target_id, 14, &
	197	comm_inter, status, ierr )
[108]	198	!
[709]	199	!-- Send the momentum flux (u) at bottom surface to the ocean
	200	CALL MPI_SEND( usws(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 15, &
	201	comm_inter, ierr )
[102]	202	!
[709]	203	!-- Send the momentum flux (v) at bottom surface to the ocean
	204	CALL MPI_SEND( vsws(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 16, &
	205	comm_inter, ierr )
[102]	206	!
[709]	207	!-- Receive u at the bottom surface from the ocean
	208	CALL MPI_RECV( u(0,nysg,nxlg), 1, type_xy, target_id, 17, &
	209	comm_inter, status, ierr )
[667]	210	!
[709]	211	!-- Receive v at the bottom surface from the ocean
	212	CALL MPI_RECV( v(0,nysg,nxlg), 1, type_xy, target_id, 18, &
	213	comm_inter, status, ierr )
[667]	214	!
	215	!-- Horizontal grid size or number of processors differs between
	216	!-- ocean and atmosphere
	217	ELSE
	218
	219	!
[709]	220	!-- Send heat flux at bottom surface to the ocean
[1353]	221	total_2d_a = 0.0_wp
	222	total_2d = 0.0_wp
[667]	223	total_2d(nys:nyn,nxl:nxr) = shf(nys:nyn,nxl:nxr)
[709]	224
	225	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
	226	comm2d, ierr )
	227	CALL interpolate_to_ocean( 12 )
[667]	228	!
[709]	229	!-- Send humidity flux at bottom surface to the ocean
	230	IF ( humidity ) THEN
[1353]	231	total_2d_a = 0.0_wp
	232	total_2d = 0.0_wp
[667]	233	total_2d(nys:nyn,nxl:nxr) = qsws(nys:nyn,nxl:nxr)
[709]	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 )
[667]	238	ENDIF
	239	!
[709]	240	!-- Receive temperature at the bottom surface from the ocean
	241	IF ( myid == 0 ) THEN
[667]	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 )
[709]	246	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
	247	ierr )
[667]	248	pt(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
	249	!
[709]	250	!-- Send momentum flux (u) at bottom surface to the ocean
[1353]	251	total_2d_a = 0.0_wp
	252	total_2d = 0.0_wp
[667]	253	total_2d(nys:nyn,nxl:nxr) = usws(nys:nyn,nxl:nxr)
[709]	254	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
	255	comm2d, ierr )
	256	CALL interpolate_to_ocean( 15 )
[667]	257	!
[709]	258	!-- Send momentum flux (v) at bottom surface to the ocean
[1353]	259	total_2d_a = 0.0_wp
	260	total_2d = 0.0_wp
[667]	261	total_2d(nys:nyn,nxl:nxr) = vsws(nys:nyn,nxl:nxr)
[709]	262	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
	263	comm2d, ierr )
	264	CALL interpolate_to_ocean( 16 )
[667]	265	!
[709]	266	!-- Receive u at the bottom surface from the ocean
	267	IF ( myid == 0 ) THEN
[667]	268	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
[709]	269	target_id, 17, comm_inter, status, ierr )
[667]	270	ENDIF
	271	CALL MPI_BARRIER( comm2d, ierr )
[709]	272	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
	273	ierr )
[667]	274	u(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
	275	!
[709]	276	!-- Receive v at the bottom surface from the ocean
	277	IF ( myid == 0 ) THEN
[667]	278	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
[709]	279	target_id, 18, comm_inter, status, ierr )
[667]	280	ENDIF
	281	CALL MPI_BARRIER( comm2d, ierr )
[709]	282	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
	283	ierr )
[667]	284	v(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
	285
	286	ENDIF
	287
[102]	288	ELSEIF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
	289
	290	!
[667]	291	!-- Horizontal grid size and number of processors is equal
	292	!-- in ocean and atmosphere
	293	IF ( coupling_topology == 0 ) THEN
	294	!
[709]	295	!-- Receive heat flux at the sea surface (top) from the atmosphere
	296	CALL MPI_RECV( tswst(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 12, &
	297	comm_inter, status, ierr )
[102]	298	!
[709]	299	!-- Receive humidity flux from the atmosphere (bottom)
[667]	300	!-- and add it to the heat flux at the sea surface (top)...
	301	IF ( humidity_remote ) THEN
	302	CALL MPI_RECV( qswst_remote(nysg,nxlg), ngp_xy, MPI_REAL, &
	303	target_id, 13, comm_inter, status, ierr )
	304	ENDIF
	305	!
	306	!-- Send sea surface temperature to the atmosphere model
[709]	307	CALL MPI_SEND( pt(nzt,nysg,nxlg), 1, type_xy, target_id, 14, &
	308	comm_inter, ierr )
[667]	309	!
	310	!-- Receive momentum flux (u) at the sea surface (top) from the atmosphere
[709]	311	CALL MPI_RECV( uswst(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 15, &
	312	comm_inter, status, ierr )
[667]	313	!
	314	!-- Receive momentum flux (v) at the sea surface (top) from the atmosphere
[709]	315	CALL MPI_RECV( vswst(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 16, &
	316	comm_inter, status, ierr )
[667]	317	!
[709]	318	!-- Send u to the atmosphere
	319	CALL MPI_SEND( u(nzt,nysg,nxlg), 1, type_xy, target_id, 17, &
	320	comm_inter, ierr )
[667]	321	!
[709]	322	!-- Send v to the atmosphere
	323	CALL MPI_SEND( v(nzt,nysg,nxlg), 1, type_xy, target_id, 18, &
	324	comm_inter, ierr )
	325	!
[667]	326	!-- Horizontal gridsize or number of processors differs between
	327	!-- ocean and atmosphere
	328	ELSE
	329	!
[709]	330	!-- Receive heat flux at the sea surface (top) from the atmosphere
	331	IF ( myid == 0 ) THEN
[667]	332	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
[709]	333	target_id, 12, comm_inter, status, ierr )
[667]	334	ENDIF
	335	CALL MPI_BARRIER( comm2d, ierr )
[709]	336	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, &
	337	ierr )
[667]	338	tswst(nysg:nyng,nxlg:nxrg) = total_2d_o(nysg:nyng,nxlg:nxrg)
	339	!
[709]	340	!-- Receive humidity flux at the sea surface (top) from the atmosphere
	341	IF ( humidity_remote ) THEN
	342	IF ( myid == 0 ) THEN
[667]	343	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
[709]	344	target_id, 13, comm_inter, status, ierr )
[667]	345	ENDIF
	346	CALL MPI_BARRIER( comm2d, ierr )
[709]	347	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, &
	348	comm2d, ierr)
[667]	349	qswst_remote(nysg:nyng,nxlg:nxrg) = total_2d_o(nysg:nyng,nxlg:nxrg)
	350	ENDIF
	351	!
	352	!-- Send surface temperature to atmosphere
[1353]	353	total_2d_o = 0.0_wp
	354	total_2d = 0.0_wp
[667]	355	total_2d(nys:nyn,nxl:nxr) = pt(nzt,nys:nyn,nxl:nxr)
	356
[709]	357	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
	358	comm2d, ierr)
	359	CALL interpolate_to_atmos( 14 )
[667]	360	!
[709]	361	!-- Receive momentum flux (u) at the sea surface (top) from the atmosphere
	362	IF ( myid == 0 ) THEN
[667]	363	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
[709]	364	target_id, 15, comm_inter, status, ierr )
[667]	365	ENDIF
	366	CALL MPI_BARRIER( comm2d, ierr )
	367	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
[709]	368	0, comm2d, ierr )
[667]	369	uswst(nysg:nyng,nxlg:nxrg) = total_2d_o(nysg:nyng,nxlg:nxrg)
	370	!
[709]	371	!-- Receive momentum flux (v) at the sea surface (top) from the atmosphere
	372	IF ( myid == 0 ) THEN
[667]	373	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
[709]	374	target_id, 16, comm_inter, status, ierr )
[667]	375	ENDIF
	376	CALL MPI_BARRIER( comm2d, ierr )
[709]	377	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, &
	378	ierr )
[667]	379	vswst(nysg:nyng,nxlg:nxrg) = total_2d_o(nysg:nyng,nxlg:nxrg)
	380	!
	381	!-- Send u to atmosphere
[1353]	382	total_2d_o = 0.0_wp
	383	total_2d = 0.0_wp
[667]	384	total_2d(nys:nyn,nxl:nxr) = u(nzt,nys:nyn,nxl:nxr)
[709]	385	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
	386	comm2d, ierr )
	387	CALL interpolate_to_atmos( 17 )
[667]	388	!
	389	!-- Send v to atmosphere
[1353]	390	total_2d_o = 0.0_wp
	391	total_2d = 0.0_wp
[667]	392	total_2d(nys:nyn,nxl:nxr) = v(nzt,nys:nyn,nxl:nxr)
[709]	393	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
	394	comm2d, ierr )
	395	CALL interpolate_to_atmos( 18 )
[667]	396
	397	ENDIF
	398
	399	!
	400	!-- Conversions of fluxes received from atmosphere
	401	IF ( humidity_remote ) THEN
[108]	402	!
[709]	403	!-- Here tswst is still the sum of atmospheric bottom heat fluxes,
	404	!-- * latent heat of vaporization in m2/s2, or 540 cal/g, or 40.65 kJ/mol
	405	!-- /(rho_atm(=1.0)*c_p)
[1427]	406	tswst = tswst + qswst_remote * l_v / cp
[709]	407	!
[667]	408	!-- ...and convert it to a salinity flux at the sea surface (top)
[108]	409	!-- following Steinhorn (1991), JPO 21, pp. 1681-1683:
	410	!-- S'w' = -S * evaporation / ( rho_water * ( 1 - S ) )
[1427]	411	saswst = -1.0_wp * sa(nzt,:,:) * 0.001_wp * qswst_remote / &
	412	( rho(nzt,:,:) * ( 1.0_wp - sa(nzt,:,:) * 0.001_wp ) )
[108]	413	ENDIF
	414
	415	!
[102]	416	!-- Adjust the kinematic heat flux with respect to ocean density
	417	!-- (constants are the specific heat capacities for air and water)
[667]	418	!-- now tswst is the ocean top heat flux
[1427]	419	tswst = tswst / rho(nzt,:,:) * cp / cpw
[102]	420
	421	!
[667]	422	!-- Adjust the momentum fluxes with respect to ocean density
	423	uswst = uswst / rho(nzt,:,:)
	424	vswst = vswst / rho(nzt,:,:)
[102]	425
[667]	426	ENDIF
	427
[709]	428	IF ( coupling_topology == 1 ) THEN
[667]	429	DEALLOCATE( total_2d_o, total_2d_a )
	430	ENDIF
	431
	432	CALL cpu_log( log_point(39), 'surface_coupler', 'stop' )
	433
	434	#endif
	435
	436	END SUBROUTINE surface_coupler
	437
	438
	439
[709]	440	SUBROUTINE interpolate_to_atmos( tag )
[667]	441
[880]	442	#if defined( __parallel )
	443
[1320]	444	USE arrays_3d, &
	445	ONLY: total_2d_a, total_2d_o
[667]	446
[1320]	447	USE indices, &
	448	ONLY: nbgp, nx, nx_a, nx_o, ny, ny_a, ny_o
	449
	450	USE kinds
	451
[1324]	452	USE pegrid
[1320]	453
[667]	454	IMPLICIT NONE
	455
[1320]	456	INTEGER(iwp) :: dnx !:
	457	INTEGER(iwp) :: dnx2 !:
	458	INTEGER(iwp) :: dny !:
	459	INTEGER(iwp) :: dny2 !:
	460	INTEGER(iwp) :: i !:
	461	INTEGER(iwp) :: ii !:
	462	INTEGER(iwp) :: j !:
	463	INTEGER(iwp) :: jj !:
[667]	464
[1320]	465	INTEGER(iwp), intent(in) :: tag !:
	466
[667]	467	CALL MPI_BARRIER( comm2d, ierr )
	468
[709]	469	IF ( myid == 0 ) THEN
	470	!
	471	!-- Cyclic boundary conditions for the total 2D-grid
[667]	472	total_2d_o(-nbgp:-1,:) = total_2d_o(ny+1-nbgp:ny,:)
	473	total_2d_o(:,-nbgp:-1) = total_2d_o(:,nx+1-nbgp:nx)
	474
	475	total_2d_o(ny+1:ny+nbgp,:) = total_2d_o(0:nbgp-1,:)
	476	total_2d_o(:,nx+1:nx+nbgp) = total_2d_o(:,0:nbgp-1)
	477
[102]	478	!
[667]	479	!-- Number of gridpoints of the fine grid within one mesh of the coarse grid
	480	dnx = (nx_o+1) / (nx_a+1)
	481	dny = (ny_o+1) / (ny_a+1)
[102]	482
	483	!
[709]	484	!-- Distance for interpolation around coarse grid points within the fine
	485	!-- grid (note: 2*dnx2 must not be equal with dnx)
[667]	486	dnx2 = 2 * ( dnx / 2 )
	487	dny2 = 2 * ( dny / 2 )
[102]	488
[1353]	489	total_2d_a = 0.0_wp
[102]	490	!
[667]	491	!-- Interpolation from ocean-grid-layer to atmosphere-grid-layer
	492	DO j = 0, ny_a
	493	DO i = 0, nx_a
	494	DO jj = 0, dny2
	495	DO ii = 0, dnx2
	496	total_2d_a(j,i) = total_2d_a(j,i) &
	497	+ total_2d_o(jdny+jj,idnx+ii)
	498	ENDDO
	499	ENDDO
	500	total_2d_a(j,i) = total_2d_a(j,i) / ( ( dnx2 + 1 ) * ( dny2 + 1 ) )
	501	ENDDO
	502	ENDDO
	503	!
[709]	504	!-- Cyclic boundary conditions for atmosphere grid
[667]	505	total_2d_a(-nbgp:-1,:) = total_2d_a(ny_a+1-nbgp:ny_a,:)
	506	total_2d_a(:,-nbgp:-1) = total_2d_a(:,nx_a+1-nbgp:nx_a)
	507
	508	total_2d_a(ny_a+1:ny_a+nbgp,:) = total_2d_a(0:nbgp-1,:)
	509	total_2d_a(:,nx_a+1:nx_a+nbgp) = total_2d_a(:,0:nbgp-1)
	510	!
	511	!-- Transfer of the atmosphere-grid-layer to the atmosphere
[709]	512	CALL MPI_SEND( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, target_id, &
	513	tag, comm_inter, ierr )
[102]	514
	515	ENDIF
	516
[667]	517	CALL MPI_BARRIER( comm2d, ierr )
[102]	518
[880]	519	#endif
	520
[667]	521	END SUBROUTINE interpolate_to_atmos
[102]	522
[667]	523
[709]	524	SUBROUTINE interpolate_to_ocean( tag )
[667]	525
[880]	526	#if defined( __parallel )
	527
[1320]	528	USE arrays_3d, &
	529	ONLY: total_2d_a, total_2d_o
[667]	530
[1320]	531	USE indices, &
	532	ONLY: nbgp, nx, nx_a, nx_o, ny, ny_a, ny_o
	533
	534	USE kinds
	535
[1324]	536	USE pegrid
[1320]	537
[667]	538	IMPLICIT NONE
	539
[1320]	540	INTEGER(iwp) :: dnx !:
	541	INTEGER(iwp) :: dny !:
	542	INTEGER(iwp) :: i !:
	543	INTEGER(iwp) :: ii !:
	544	INTEGER(iwp) :: j !:
	545	INTEGER(iwp) :: jj !:
	546	INTEGER(iwp), intent(in) :: tag !:
[667]	547
[1320]	548	REAL(wp) :: fl !:
	549	REAL(wp) :: fr !:
	550	REAL(wp) :: myl !:
	551	REAL(wp) :: myr !:
[709]	552
[667]	553	CALL MPI_BARRIER( comm2d, ierr )
	554
[709]	555	IF ( myid == 0 ) THEN
[667]	556
	557	!
[709]	558	!-- Number of gridpoints of the fine grid within one mesh of the coarse grid
[667]	559	dnx = ( nx_o + 1 ) / ( nx_a + 1 )
	560	dny = ( ny_o + 1 ) / ( ny_a + 1 )
	561
	562	!
[709]	563	!-- Cyclic boundary conditions for atmosphere grid
[667]	564	total_2d_a(-nbgp:-1,:) = total_2d_a(ny+1-nbgp:ny,:)
	565	total_2d_a(:,-nbgp:-1) = total_2d_a(:,nx+1-nbgp:nx)
	566
	567	total_2d_a(ny+1:ny+nbgp,:) = total_2d_a(0:nbgp-1,:)
	568	total_2d_a(:,nx+1:nx+nbgp) = total_2d_a(:,0:nbgp-1)
	569	!
[709]	570	!-- Bilinear Interpolation from atmosphere grid-layer to ocean grid-layer
[667]	571	DO j = 0, ny
	572	DO i = 0, nx
	573	myl = ( total_2d_a(j+1,i) - total_2d_a(j,i) ) / dny
	574	myr = ( total_2d_a(j+1,i+1) - total_2d_a(j,i+1) ) / dny
	575	DO jj = 0, dny-1
[709]	576	fl = myl*jj + total_2d_a(j,i)
	577	fr = myr*jj + total_2d_a(j,i+1)
[667]	578	DO ii = 0, dnx-1
	579	total_2d_o(jdny+jj,idnx+ii) = ( fr - fl ) / dnx * ii + fl
	580	ENDDO
	581	ENDDO
	582	ENDDO
	583	ENDDO
	584	!
[709]	585	!-- Cyclic boundary conditions for ocean grid
[667]	586	total_2d_o(-nbgp:-1,:) = total_2d_o(ny_o+1-nbgp:ny_o,:)
	587	total_2d_o(:,-nbgp:-1) = total_2d_o(:,nx_o+1-nbgp:nx_o)
	588
	589	total_2d_o(ny_o+1:ny_o+nbgp,:) = total_2d_o(0:nbgp-1,:)
	590	total_2d_o(:,nx_o+1:nx_o+nbgp) = total_2d_o(:,0:nbgp-1)
	591
	592	CALL MPI_SEND( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
	593	target_id, tag, comm_inter, ierr )
	594
	595	ENDIF
	596
	597	CALL MPI_BARRIER( comm2d, ierr )
	598
[880]	599	#endif
	600
[667]	601	END SUBROUTINE interpolate_to_ocean

Note: See TracBrowser for help on using the repository browser.

Download in other formats:

| Impressum | ©Leibniz Universität Hannover |