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source: palm/trunk/SOURCE/surface_coupler.f90 @ 4319

Last change on this file since 4319 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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[1682]	1	!> @file surface_coupler.f90
[2000]	2	!------------------------------------------------------------------------------!
[2696]	3	! This file is part of the PALM model system.
[1036]	4	!
[2000]	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.
[1036]	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	!
[3655]	17	! Copyright 1997-2019 Leibniz Universitaet Hannover
[2000]	18	!------------------------------------------------------------------------------!
[1036]	19	!
[258]	20	! Current revisions:
[1092]	21	! ------------------
[1321]	22	!
[3049]	23	!
[1321]	24	! Former revisions:
	25	! -----------------
	26	! $Id: surface_coupler.f90 4182 2019-08-22 15:20:23Z suehring $
[4182]	27	! Corrected "Former revisions" section
	28	!
	29	! 3655 2019-01-07 16:51:22Z knoop
[3274]	30	! Modularization of all bulk cloud physics code components
[1321]	31	!
[4182]	32	! 109 2007-08-28 15:26:47Z letzel
	33	! Initial revision
	34	!
[102]	35	! Description:
	36	! ------------
[1682]	37	!> Data exchange at the interface between coupled models
[102]	38	!------------------------------------------------------------------------------!
[1682]	39	SUBROUTINE surface_coupler
	40
[102]	41
[1320]	42	USE arrays_3d, &
[2232]	43	ONLY: pt, rho_ocean, sa, total_2d_a, total_2d_o, u, v
[1320]	44
[3274]	45	USE basic_constants_and_equations_mod, &
	46	ONLY: c_p, l_v
[1427]	47
[1320]	48	USE control_parameters, &
	49	ONLY: coupling_mode, coupling_mode_remote, coupling_topology, &
[2232]	50	humidity, humidity_remote, land_surface, message_string, &
	51	terminate_coupled, terminate_coupled_remote, &
	52	time_since_reference_point, urban_surface
[1320]	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
[102]	63	USE pegrid
	64
[2232]	65	USE surface_mod, &
	66	ONLY : surf_def_h, surf_lsm_h, surf_type, surf_usm_h
	67
[102]	68	IMPLICIT NONE
	69
[2232]	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
[1682]	75	REAL(wp) :: time_since_reference_point_rem !<
	76	REAL(wp) :: total_2d(-nbgp:ny+nbgp,-nbgp:nx+nbgp) !<
[102]	77
[2232]	78	REAL(wp), DIMENSION(nysg:nyng,nxlg:nxrg) :: surface_flux !< dummy array for surface fluxes on 2D grid
[1427]	79
[2232]	80
[206]	81	#if defined( __parallel )
[102]	82
[667]	83	CALL cpu_log( log_point(39), 'surface_coupler', 'start' )
[102]	84
[667]	85
	86
[102]	87	!
[108]	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.
[667]	94
	95	IF ( coupling_topology == 0 ) THEN
[709]	96	CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, target_id, &
	97	0, &
	98	terminate_coupled_remote, 1, MPI_INTEGER, target_id, &
[667]	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
[709]	108	CALL MPI_BCAST( terminate_coupled_remote, 1, MPI_INTEGER, 0, comm2d, &
	109	ierr )
[667]	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
[108]	116	IF ( terminate_coupled_remote > 0 ) THEN
[3045]	117	WRITE( message_string, * ) 'remote model "', &
	118	TRIM( coupling_mode_remote ), &
	119	'" terminated', &
[3046]	120	'&with terminate_coupled_remote = ', &
[3045]	121	terminate_coupled_remote, &
[3046]	122	'&local model "', TRIM( coupling_mode ), &
[3045]	123	'" has', &
[3046]	124	'&terminate_coupled = ', &
[667]	125	terminate_coupled
[258]	126	CALL message( 'surface_coupler', 'PA0310', 1, 2, 0, 6, 0 )
[108]	127	RETURN
	128	ENDIF
[667]	129
[291]	130
[108]	131	!
	132	!-- Exchange the current simulated time between the models,
[2232]	133	!-- currently just for total_2d
[709]	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 )
[667]	140	ELSE
[709]	141
[667]	142	IF ( myid == 0 ) THEN
[709]	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, &
[667]	147	target_id, 11, comm_inter, status, ierr )
[709]	148
[667]	149	ENDIF
[709]	150
	151	CALL MPI_BCAST( time_since_reference_point_rem, 1, MPI_REAL, 0, comm2d, &
	152	ierr )
	153
[667]	154	ENDIF
[102]	155
	156	!
	157	!-- Exchange the interface data
	158	IF ( coupling_mode == 'atmosphere_to_ocean' ) THEN
[667]	159
	160	!
[709]	161	!-- Horizontal grid size and number of processors is equal in ocean and
	162	!-- atmosphere
	163	IF ( coupling_topology == 0 ) THEN
[102]	164
	165	!
[2232]	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 )
[102]	172	!
[2232]	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 )
[667]	177	IF ( humidity ) THEN
[2232]	178	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, &
	179	target_id, 13, comm_inter, ierr )
[667]	180	ENDIF
	181	!
[709]	182	!-- Receive temperature at the bottom surface from the ocean
[2232]	183	CALL MPI_RECV( pt(0,nysg,nxlg), 1, type_xy, target_id, 14, &
[709]	184	comm_inter, status, ierr )
[108]	185	!
[2232]	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 )
[102]	192	!
[2232]	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 )
[102]	199	!
[709]	200	!-- Receive u at the bottom surface from the ocean
[2232]	201	CALL MPI_RECV( u(0,nysg,nxlg), 1, type_xy, target_id, 17, &
[709]	202	comm_inter, status, ierr )
[667]	203	!
[709]	204	!-- Receive v at the bottom surface from the ocean
[2232]	205	CALL MPI_RECV( v(0,nysg,nxlg), 1, type_xy, target_id, 18, &
[709]	206	comm_inter, status, ierr )
[667]	207	!
	208	!-- Horizontal grid size or number of processors differs between
	209	!-- ocean and atmosphere
	210	ELSE
	211
	212	!
[709]	213	!-- Send heat flux at bottom surface to the ocean
[1353]	214	total_2d_a = 0.0_wp
	215	total_2d = 0.0_wp
[2232]	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 )
[709]	220
[2232]	221	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
[709]	222	comm2d, ierr )
	223	CALL interpolate_to_ocean( 12 )
[667]	224	!
[709]	225	!-- Send humidity flux at bottom surface to the ocean
	226	IF ( humidity ) THEN
[1353]	227	total_2d_a = 0.0_wp
	228	total_2d = 0.0_wp
[2232]	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 )
[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
[2232]	242	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
[667]	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
[2232]	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 )
[709]	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 )
[667]	260	!
[709]	261	!-- Send momentum flux (v) at bottom surface to the ocean
[1353]	262	total_2d_a = 0.0_wp
	263	total_2d = 0.0_wp
[2232]	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 )
[709]	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 )
[667]	271	!
[709]	272	!-- Receive u at the bottom surface from the ocean
	273	IF ( myid == 0 ) THEN
[667]	274	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
[709]	275	target_id, 17, comm_inter, status, ierr )
[667]	276	ENDIF
	277	CALL MPI_BARRIER( comm2d, ierr )
[709]	278	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
	279	ierr )
[667]	280	u(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
	281	!
[709]	282	!-- Receive v at the bottom surface from the ocean
	283	IF ( myid == 0 ) THEN
[667]	284	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
[709]	285	target_id, 18, comm_inter, status, ierr )
[667]	286	ENDIF
	287	CALL MPI_BARRIER( comm2d, ierr )
[709]	288	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
	289	ierr )
[667]	290	v(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
	291
	292	ENDIF
	293
[102]	294	ELSEIF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
	295
	296	!
[667]	297	!-- Horizontal grid size and number of processors is equal
	298	!-- in ocean and atmosphere
	299	IF ( coupling_topology == 0 ) THEN
	300	!
[709]	301	!-- Receive heat flux at the sea surface (top) from the atmosphere
[2232]	302	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 12, &
[709]	303	comm_inter, status, ierr )
[2232]	304	CALL transfer_2D_to_1D_equal( surf_def_h(2)%shf )
[102]	305	!
[709]	306	!-- Receive humidity flux from the atmosphere (bottom)
[667]	307	!-- and add it to the heat flux at the sea surface (top)...
	308	IF ( humidity_remote ) THEN
[2232]	309	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, &
[667]	310	target_id, 13, comm_inter, status, ierr )
[2232]	311	CALL transfer_2D_to_1D_equal( surf_def_h(2)%qsws )
[667]	312	ENDIF
	313	!
	314	!-- Send sea surface temperature to the atmosphere model
[709]	315	CALL MPI_SEND( pt(nzt,nysg,nxlg), 1, type_xy, target_id, 14, &
	316	comm_inter, ierr )
[667]	317	!
	318	!-- Receive momentum flux (u) at the sea surface (top) from the atmosphere
[2232]	319	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 15, &
[709]	320	comm_inter, status, ierr )
[2232]	321	CALL transfer_2D_to_1D_equal( surf_def_h(2)%usws )
[667]	322	!
	323	!-- Receive momentum flux (v) at the sea surface (top) from the atmosphere
[2232]	324	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 16, &
[709]	325	comm_inter, status, ierr )
[2232]	326	CALL transfer_2D_to_1D_equal( surf_def_h(2)%vsws )
[667]	327	!
[709]	328	!-- Send u to the atmosphere
	329	CALL MPI_SEND( u(nzt,nysg,nxlg), 1, type_xy, target_id, 17, &
	330	comm_inter, ierr )
[667]	331	!
[709]	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	!
[667]	336	!-- Horizontal gridsize or number of processors differs between
	337	!-- ocean and atmosphere
	338	ELSE
	339	!
[709]	340	!-- Receive heat flux at the sea surface (top) from the atmosphere
	341	IF ( myid == 0 ) THEN
[667]	342	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
[709]	343	target_id, 12, comm_inter, status, ierr )
[667]	344	ENDIF
	345	CALL MPI_BARRIER( comm2d, ierr )
[709]	346	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, &
	347	ierr )
[2232]	348	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%shf )
[667]	349	!
[709]	350	!-- Receive humidity flux at the sea surface (top) from the atmosphere
	351	IF ( humidity_remote ) THEN
	352	IF ( myid == 0 ) THEN
[667]	353	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
[709]	354	target_id, 13, comm_inter, status, ierr )
[667]	355	ENDIF
	356	CALL MPI_BARRIER( comm2d, ierr )
[709]	357	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, &
	358	comm2d, ierr)
[2232]	359	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%qsws )
[667]	360	ENDIF
	361	!
	362	!-- Send surface temperature to atmosphere
[1353]	363	total_2d_o = 0.0_wp
	364	total_2d = 0.0_wp
[667]	365	total_2d(nys:nyn,nxl:nxr) = pt(nzt,nys:nyn,nxl:nxr)
	366
[709]	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 )
[667]	370	!
[709]	371	!-- Receive momentum flux (u) 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, 15, comm_inter, status, ierr )
[667]	375	ENDIF
	376	CALL MPI_BARRIER( comm2d, ierr )
	377	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
[709]	378	0, comm2d, ierr )
[2232]	379	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%usws )
[667]	380	!
[709]	381	!-- Receive momentum flux (v) at the sea surface (top) from the atmosphere
	382	IF ( myid == 0 ) THEN
[667]	383	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
[709]	384	target_id, 16, comm_inter, status, ierr )
[667]	385	ENDIF
	386	CALL MPI_BARRIER( comm2d, ierr )
[709]	387	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, &
	388	ierr )
[2232]	389	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%vsws )
[667]	390	!
	391	!-- Send u to atmosphere
[1353]	392	total_2d_o = 0.0_wp
	393	total_2d = 0.0_wp
[667]	394	total_2d(nys:nyn,nxl:nxr) = u(nzt,nys:nyn,nxl:nxr)
[709]	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 )
[667]	398	!
	399	!-- Send v to atmosphere
[1353]	400	total_2d_o = 0.0_wp
	401	total_2d = 0.0_wp
[667]	402	total_2d(nys:nyn,nxl:nxr) = v(nzt,nys:nyn,nxl:nxr)
[709]	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 )
[667]	406
	407	ENDIF
	408
	409	!
	410	!-- Conversions of fluxes received from atmosphere
	411	IF ( humidity_remote ) THEN
[108]	412	!
[2232]	413	!-- Here top heat flux is still the sum of atmospheric bottom heat fluxes,
[709]	414	!-- * latent heat of vaporization in m2/s2, or 540 cal/g, or 40.65 kJ/mol
	415	!-- /(rho_atm(=1.0)*c_p)
[2232]	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) + &
[3274]	421	surf_def_h(2)%qsws(m) * l_v / c_p
[709]	422	!
[2232]	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
[108]	432	ENDIF
	433
	434	!
[102]	435	!-- Adjust the kinematic heat flux with respect to ocean density
[2232]	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) * &
[3274]	442	c_p / cpw
[102]	443
[2232]	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
[102]	447
[667]	448	ENDIF
	449
[709]	450	IF ( coupling_topology == 1 ) THEN
[667]	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
[2232]	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
[667]	615	END SUBROUTINE surface_coupler
	616
	617
	618
[1682]	619	!------------------------------------------------------------------------------!
	620	! Description:
	621	! ------------
	622	!> @todo Missing subroutine description.
	623	!------------------------------------------------------------------------------!
[709]	624	SUBROUTINE interpolate_to_atmos( tag )
[667]	625
[880]	626	#if defined( __parallel )
	627
[1320]	628	USE arrays_3d, &
	629	ONLY: total_2d_a, total_2d_o
[667]	630
[1320]	631	USE indices, &
	632	ONLY: nbgp, nx, nx_a, nx_o, ny, ny_a, ny_o
	633
	634	USE kinds
	635
[1324]	636	USE pegrid
[1320]	637
[667]	638	IMPLICIT NONE
	639
[1682]	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 !<
[667]	648
[1682]	649	INTEGER(iwp), intent(in) :: tag !<
[1320]	650
[667]	651	CALL MPI_BARRIER( comm2d, ierr )
	652
[709]	653	IF ( myid == 0 ) THEN
	654	!
	655	!-- Cyclic boundary conditions for the total 2D-grid
[667]	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
[102]	662	!
[667]	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)
[102]	666
	667	!
[709]	668	!-- Distance for interpolation around coarse grid points within the fine
	669	!-- grid (note: 2*dnx2 must not be equal with dnx)
[667]	670	dnx2 = 2 * ( dnx / 2 )
	671	dny2 = 2 * ( dny / 2 )
[102]	672
[1353]	673	total_2d_a = 0.0_wp
[102]	674	!
[667]	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	!
[709]	688	!-- Cyclic boundary conditions for atmosphere grid
[667]	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
[709]	696	CALL MPI_SEND( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, target_id, &
	697	tag, comm_inter, ierr )
[102]	698
	699	ENDIF
	700
[667]	701	CALL MPI_BARRIER( comm2d, ierr )
[102]	702
[880]	703	#endif
	704
[667]	705	END SUBROUTINE interpolate_to_atmos
[102]	706
[667]	707
[1682]	708	!------------------------------------------------------------------------------!
	709	! Description:
	710	! ------------
	711	!> @todo Missing subroutine description.
	712	!------------------------------------------------------------------------------!
[709]	713	SUBROUTINE interpolate_to_ocean( tag )
[667]	714
[880]	715	#if defined( __parallel )
	716
[1320]	717	USE arrays_3d, &
	718	ONLY: total_2d_a, total_2d_o
[667]	719
[1320]	720	USE indices, &
	721	ONLY: nbgp, nx, nx_a, nx_o, ny, ny_a, ny_o
	722
	723	USE kinds
	724
[1324]	725	USE pegrid
[1320]	726
[667]	727	IMPLICIT NONE
	728
[1682]	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 !<
[667]	736
[1682]	737	REAL(wp) :: fl !<
	738	REAL(wp) :: fr !<
	739	REAL(wp) :: myl !<
	740	REAL(wp) :: myr !<
[709]	741
[667]	742	CALL MPI_BARRIER( comm2d, ierr )
	743
[709]	744	IF ( myid == 0 ) THEN
[667]	745
	746	!
[709]	747	!-- Number of gridpoints of the fine grid within one mesh of the coarse grid
[667]	748	dnx = ( nx_o + 1 ) / ( nx_a + 1 )
	749	dny = ( ny_o + 1 ) / ( ny_a + 1 )
	750
	751	!
[709]	752	!-- Cyclic boundary conditions for atmosphere grid
[667]	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	!
[709]	759	!-- Bilinear Interpolation from atmosphere grid-layer to ocean grid-layer
[667]	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
[709]	765	fl = myl*jj + total_2d_a(j,i)
	766	fr = myr*jj + total_2d_a(j,i+1)
[667]	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	!
[709]	774	!-- Cyclic boundary conditions for ocean grid
[667]	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
[880]	788	#endif
	789
[667]	790	END SUBROUTINE interpolate_to_ocean

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