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source: palm/trunk/SOURCE/surface_coupler.f90 @ 3045

Last change on this file since 3045 was 3045, checked in by Giersch, 6 years ago
Code adjusted according to coding standards, renamed namelists, error messages revised until PA0347, output CASE 108 disabled
Property svn:keywords set to `Id`
File size: 31.8 KB

Rev	Line
[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	!
[2718]	17	! Copyright 1997-2018 Leibniz Universitaet Hannover
[2000]	18	!------------------------------------------------------------------------------!
[1036]	19	!
[258]	20	! Current revisions:
[1092]	21	! ------------------
[1321]	22	!
[2233]	23	!
[1321]	24	! Former revisions:
	25	! -----------------
	26	! $Id: surface_coupler.f90 3045 2018-05-28 07:55:41Z Giersch $
[3045]	27	! Error message revised
	28	!
	29	! 2718 2018-01-02 08:49:38Z maronga
[2716]	30	! Corrected "Former revisions" section
	31	!
	32	! 2696 2017-12-14 17:12:51Z kanani
	33	! Change in file header (GPL part)
[1321]	34	!
[2716]	35	! 2233 2017-05-30 18:08:54Z suehring
	36	!
[2233]	37	! 2232 2017-05-30 17:47:52Z suehring
	38	! Adjust to new surface structure. Transfer 1D surface fluxes onto 2D grid
	39	! (and back).
	40	!
[2032]	41	! 2031 2016-10-21 15:11:58Z knoop
	42	! renamed variable rho to rho_ocean
	43	!
[2001]	44	! 2000 2016-08-20 18:09:15Z knoop
	45	! Forced header and separation lines into 80 columns
	46	!
[1683]	47	! 1682 2015-10-07 23:56:08Z knoop
	48	! Code annotations made doxygen readable
	49	!
[1428]	50	! 1427 2014-07-07 14:04:59Z maronga
	51	! Bugfix: value of l_v corrected.
	52	!
[1419]	53	! 1418 2014-06-06 13:05:08Z fricke
	54	! Bugfix: For caluclation of the salinity flux at the sea surface,
	55	! the given value for salinity must be in percent and not in psu
	56	!
[1354]	57	! 1353 2014-04-08 15:21:23Z heinze
	58	! REAL constants provided with KIND-attribute
	59	!
[1325]	60	! 1324 2014-03-21 09:13:16Z suehring
	61	! Bugfix: ONLY statement for module pegrid removed
	62	!
[1323]	63	! 1322 2014-03-20 16:38:49Z raasch
	64	! REAL constants defined as wp-kind
	65	!
[1321]	66	! 1320 2014-03-20 08:40:49Z raasch
[1320]	67	! ONLY-attribute added to USE-statements,
	68	! kind-parameters added to all INTEGER and REAL declaration statements,
	69	! kinds are defined in new module kinds,
	70	! old module precision_kind is removed,
	71	! revision history before 2012 removed,
	72	! comment fields (!:) to be used for variable explanations added to
	73	! all variable declaration statements
[102]	74	!
[1319]	75	! 1318 2014-03-17 13:35:16Z raasch
	76	! module interfaces removed
	77	!
[1093]	78	! 1092 2013-02-02 11:24:22Z raasch
	79	! unused variables removed
	80	!
[1037]	81	! 1036 2012-10-22 13:43:42Z raasch
	82	! code put under GPL (PALM 3.9)
	83	!
[881]	84	! 880 2012-04-13 06:28:59Z raasch
	85	! Bugfix: preprocessor statements for parallel execution added
	86	!
[110]	87	! 109 2007-08-28 15:26:47Z letzel
[102]	88	! Initial revision
	89	!
	90	! Description:
	91	! ------------
[1682]	92	!> Data exchange at the interface between coupled models
[102]	93	!------------------------------------------------------------------------------!
[1682]	94	SUBROUTINE surface_coupler
	95
[102]	96
[1320]	97	USE arrays_3d, &
[2232]	98	ONLY: pt, rho_ocean, sa, total_2d_a, total_2d_o, u, v
[1320]	99
[1427]	100	USE cloud_parameters, &
	101	ONLY: cp, l_v
	102
[1320]	103	USE control_parameters, &
	104	ONLY: coupling_mode, coupling_mode_remote, coupling_topology, &
[2232]	105	humidity, humidity_remote, land_surface, message_string, &
	106	terminate_coupled, terminate_coupled_remote, &
	107	time_since_reference_point, urban_surface
[1320]	108
	109	USE cpulog, &
	110	ONLY: cpu_log, log_point
	111
	112	USE indices, &
	113	ONLY: nbgp, nx, nxl, nxlg, nxr, nxrg, nx_a, nx_o, ny, nyn, nyng, nys, &
	114	nysg, ny_a, ny_o, nzt
	115
	116	USE kinds
	117
[102]	118	USE pegrid
	119
[2232]	120	USE surface_mod, &
	121	ONLY : surf_def_h, surf_lsm_h, surf_type, surf_usm_h
	122
[102]	123	IMPLICIT NONE
	124
[2232]	125	INTEGER(iwp) :: i !< index variable x-direction
	126	INTEGER(iwp) :: j !< index variable y-direction
	127	INTEGER(iwp) :: m !< running index for surface elements
	128
	129	REAL(wp) :: cpw = 4218.0_wp !< heat capacity of water at constant pressure
[1682]	130	REAL(wp) :: time_since_reference_point_rem !<
	131	REAL(wp) :: total_2d(-nbgp:ny+nbgp,-nbgp:nx+nbgp) !<
[102]	132
[2232]	133	REAL(wp), DIMENSION(nysg:nyng,nxlg:nxrg) :: surface_flux !< dummy array for surface fluxes on 2D grid
[1427]	134
[2232]	135
[206]	136	#if defined( __parallel )
[102]	137
[667]	138	CALL cpu_log( log_point(39), 'surface_coupler', 'start' )
[102]	139
[667]	140
	141
[102]	142	!
[108]	143	!-- In case of model termination initiated by the remote model
	144	!-- (terminate_coupled_remote > 0), initiate termination of the local model.
	145	!-- The rest of the coupler must then be skipped because it would cause an MPI
	146	!-- intercomminucation hang.
	147	!-- If necessary, the coupler will be called at the beginning of the next
	148	!-- restart run.
[667]	149
	150	IF ( coupling_topology == 0 ) THEN
[709]	151	CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, target_id, &
	152	0, &
	153	terminate_coupled_remote, 1, MPI_INTEGER, target_id, &
[667]	154	0, comm_inter, status, ierr )
	155	ELSE
	156	IF ( myid == 0) THEN
	157	CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, &
	158	target_id, 0, &
	159	terminate_coupled_remote, 1, MPI_INTEGER, &
	160	target_id, 0, &
	161	comm_inter, status, ierr )
	162	ENDIF
[709]	163	CALL MPI_BCAST( terminate_coupled_remote, 1, MPI_INTEGER, 0, comm2d, &
	164	ierr )
[667]	165
	166	ALLOCATE( total_2d_a(-nbgp:ny_a+nbgp,-nbgp:nx_a+nbgp), &
	167	total_2d_o(-nbgp:ny_o+nbgp,-nbgp:nx_o+nbgp) )
	168
	169	ENDIF
	170
[108]	171	IF ( terminate_coupled_remote > 0 ) THEN
[3045]	172	WRITE( message_string, * ) 'remote model "', &
	173	TRIM( coupling_mode_remote ), &
	174	'" terminated', &
	175	' with terminate_coupled_remote = ', &
	176	terminate_coupled_remote, &
	177	' local model "', TRIM( coupling_mode ), &
	178	'" has', &
	179	' terminate_coupled = ', &
[667]	180	terminate_coupled
[258]	181	CALL message( 'surface_coupler', 'PA0310', 1, 2, 0, 6, 0 )
[108]	182	RETURN
	183	ENDIF
[667]	184
[291]	185
[108]	186	!
	187	!-- Exchange the current simulated time between the models,
[2232]	188	!-- currently just for total_2d
[709]	189	IF ( coupling_topology == 0 ) THEN
	190
	191	CALL MPI_SEND( time_since_reference_point, 1, MPI_REAL, target_id, 11, &
	192	comm_inter, ierr )
	193	CALL MPI_RECV( time_since_reference_point_rem, 1, MPI_REAL, target_id, &
	194	11, comm_inter, status, ierr )
[667]	195	ELSE
[709]	196
[667]	197	IF ( myid == 0 ) THEN
[709]	198
	199	CALL MPI_SEND( time_since_reference_point, 1, MPI_REAL, target_id, &
	200	11, comm_inter, ierr )
	201	CALL MPI_RECV( time_since_reference_point_rem, 1, MPI_REAL, &
[667]	202	target_id, 11, comm_inter, status, ierr )
[709]	203
[667]	204	ENDIF
[709]	205
	206	CALL MPI_BCAST( time_since_reference_point_rem, 1, MPI_REAL, 0, comm2d, &
	207	ierr )
	208
[667]	209	ENDIF
[102]	210
	211	!
	212	!-- Exchange the interface data
	213	IF ( coupling_mode == 'atmosphere_to_ocean' ) THEN
[667]	214
	215	!
[709]	216	!-- Horizontal grid size and number of processors is equal in ocean and
	217	!-- atmosphere
	218	IF ( coupling_topology == 0 ) THEN
[102]	219
	220	!
[2232]	221	!-- Send heat flux at bottom surface to the ocean. First, transfer from
	222	!-- 1D surface type to 2D grid.
	223	CALL transfer_1D_to_2D_equal( surf_def_h(0)%shf, surf_lsm_h%shf, &
	224	surf_usm_h%shf )
	225	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
	226	12, comm_inter, ierr )
[102]	227	!
[2232]	228	!-- Send humidity flux at bottom surface to the ocean. First, transfer
	229	!-- from 1D surface type to 2D grid.
	230	CALL transfer_1D_to_2D_equal( surf_def_h(0)%qsws, surf_lsm_h%qsws, &
	231	surf_usm_h%qsws )
[667]	232	IF ( humidity ) THEN
[2232]	233	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, &
	234	target_id, 13, comm_inter, ierr )
[667]	235	ENDIF
	236	!
[709]	237	!-- Receive temperature at the bottom surface from the ocean
[2232]	238	CALL MPI_RECV( pt(0,nysg,nxlg), 1, type_xy, target_id, 14, &
[709]	239	comm_inter, status, ierr )
[108]	240	!
[2232]	241	!-- Send the momentum flux (u) at bottom surface to the ocean. First,
	242	!-- transfer from 1D surface type to 2D grid.
	243	CALL transfer_1D_to_2D_equal( surf_def_h(0)%usws, surf_lsm_h%usws, &
	244	surf_usm_h%usws )
	245	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
	246	15, comm_inter, ierr )
[102]	247	!
[2232]	248	!-- Send the momentum flux (v) at bottom surface to the ocean. First,
	249	!-- transfer from 1D surface type to 2D grid.
	250	CALL transfer_1D_to_2D_equal( surf_def_h(0)%vsws, surf_lsm_h%vsws, &
	251	surf_usm_h%vsws )
	252	CALL MPI_SEND( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, &
	253	16, comm_inter, ierr )
[102]	254	!
[709]	255	!-- Receive u at the bottom surface from the ocean
[2232]	256	CALL MPI_RECV( u(0,nysg,nxlg), 1, type_xy, target_id, 17, &
[709]	257	comm_inter, status, ierr )
[667]	258	!
[709]	259	!-- Receive v at the bottom surface from the ocean
[2232]	260	CALL MPI_RECV( v(0,nysg,nxlg), 1, type_xy, target_id, 18, &
[709]	261	comm_inter, status, ierr )
[667]	262	!
	263	!-- Horizontal grid size or number of processors differs between
	264	!-- ocean and atmosphere
	265	ELSE
	266
	267	!
[709]	268	!-- Send heat flux at bottom surface to the ocean
[1353]	269	total_2d_a = 0.0_wp
	270	total_2d = 0.0_wp
[2232]	271	!
	272	!-- Transfer from 1D surface type to 2D grid.
	273	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%shf, surf_lsm_h%shf, &
	274	surf_usm_h%shf )
[709]	275
[2232]	276	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
[709]	277	comm2d, ierr )
	278	CALL interpolate_to_ocean( 12 )
[667]	279	!
[709]	280	!-- Send humidity flux at bottom surface to the ocean
	281	IF ( humidity ) THEN
[1353]	282	total_2d_a = 0.0_wp
	283	total_2d = 0.0_wp
[2232]	284	!
	285	!-- Transfer from 1D surface type to 2D grid.
	286	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%qsws, &
	287	surf_lsm_h%qsws, &
	288	surf_usm_h%qsws )
[709]	289
	290	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, &
	291	0, comm2d, ierr )
	292	CALL interpolate_to_ocean( 13 )
[667]	293	ENDIF
	294	!
[709]	295	!-- Receive temperature at the bottom surface from the ocean
	296	IF ( myid == 0 ) THEN
[2232]	297	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
[667]	298	target_id, 14, comm_inter, status, ierr )
	299	ENDIF
	300	CALL MPI_BARRIER( comm2d, ierr )
[709]	301	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
	302	ierr )
[667]	303	pt(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
	304	!
[709]	305	!-- Send momentum flux (u) at bottom surface to the ocean
[1353]	306	total_2d_a = 0.0_wp
	307	total_2d = 0.0_wp
[2232]	308	!
	309	!-- Transfer from 1D surface type to 2D grid.
	310	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%usws, surf_lsm_h%usws, &
	311	surf_usm_h%usws )
[709]	312	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
	313	comm2d, ierr )
	314	CALL interpolate_to_ocean( 15 )
[667]	315	!
[709]	316	!-- Send momentum flux (v) at bottom surface to the ocean
[1353]	317	total_2d_a = 0.0_wp
	318	total_2d = 0.0_wp
[2232]	319	!
	320	!-- Transfer from 1D surface type to 2D grid.
	321	CALL transfer_1D_to_2D_unequal( surf_def_h(0)%usws, surf_lsm_h%usws, &
	322	surf_usm_h%usws )
[709]	323	CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, &
	324	comm2d, ierr )
	325	CALL interpolate_to_ocean( 16 )
[667]	326	!
[709]	327	!-- Receive u at the bottom surface from the ocean
	328	IF ( myid == 0 ) THEN
[667]	329	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
[709]	330	target_id, 17, comm_inter, status, ierr )
[667]	331	ENDIF
	332	CALL MPI_BARRIER( comm2d, ierr )
[709]	333	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
	334	ierr )
[667]	335	u(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
	336	!
[709]	337	!-- Receive v at the bottom surface from the ocean
	338	IF ( myid == 0 ) THEN
[667]	339	CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, &
[709]	340	target_id, 18, comm_inter, status, ierr )
[667]	341	ENDIF
	342	CALL MPI_BARRIER( comm2d, ierr )
[709]	343	CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, &
	344	ierr )
[667]	345	v(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg)
	346
	347	ENDIF
	348
[102]	349	ELSEIF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
	350
	351	!
[667]	352	!-- Horizontal grid size and number of processors is equal
	353	!-- in ocean and atmosphere
	354	IF ( coupling_topology == 0 ) THEN
	355	!
[709]	356	!-- Receive heat flux at the sea surface (top) from the atmosphere
[2232]	357	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 12, &
[709]	358	comm_inter, status, ierr )
[2232]	359	CALL transfer_2D_to_1D_equal( surf_def_h(2)%shf )
[102]	360	!
[709]	361	!-- Receive humidity flux from the atmosphere (bottom)
[667]	362	!-- and add it to the heat flux at the sea surface (top)...
	363	IF ( humidity_remote ) THEN
[2232]	364	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, &
[667]	365	target_id, 13, comm_inter, status, ierr )
[2232]	366	CALL transfer_2D_to_1D_equal( surf_def_h(2)%qsws )
[667]	367	ENDIF
	368	!
	369	!-- Send sea surface temperature to the atmosphere model
[709]	370	CALL MPI_SEND( pt(nzt,nysg,nxlg), 1, type_xy, target_id, 14, &
	371	comm_inter, ierr )
[667]	372	!
	373	!-- Receive momentum flux (u) at the sea surface (top) from the atmosphere
[2232]	374	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 15, &
[709]	375	comm_inter, status, ierr )
[2232]	376	CALL transfer_2D_to_1D_equal( surf_def_h(2)%usws )
[667]	377	!
	378	!-- Receive momentum flux (v) at the sea surface (top) from the atmosphere
[2232]	379	CALL MPI_RECV( surface_flux(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 16, &
[709]	380	comm_inter, status, ierr )
[2232]	381	CALL transfer_2D_to_1D_equal( surf_def_h(2)%vsws )
[667]	382	!
[709]	383	!-- Send u to the atmosphere
	384	CALL MPI_SEND( u(nzt,nysg,nxlg), 1, type_xy, target_id, 17, &
	385	comm_inter, ierr )
[667]	386	!
[709]	387	!-- Send v to the atmosphere
	388	CALL MPI_SEND( v(nzt,nysg,nxlg), 1, type_xy, target_id, 18, &
	389	comm_inter, ierr )
	390	!
[667]	391	!-- Horizontal gridsize or number of processors differs between
	392	!-- ocean and atmosphere
	393	ELSE
	394	!
[709]	395	!-- Receive heat flux at the sea surface (top) from the atmosphere
	396	IF ( myid == 0 ) THEN
[667]	397	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
[709]	398	target_id, 12, comm_inter, status, ierr )
[667]	399	ENDIF
	400	CALL MPI_BARRIER( comm2d, ierr )
[709]	401	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, &
	402	ierr )
[2232]	403	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%shf )
[667]	404	!
[709]	405	!-- Receive humidity flux at the sea surface (top) from the atmosphere
	406	IF ( humidity_remote ) THEN
	407	IF ( myid == 0 ) THEN
[667]	408	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
[709]	409	target_id, 13, comm_inter, status, ierr )
[667]	410	ENDIF
	411	CALL MPI_BARRIER( comm2d, ierr )
[709]	412	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, &
	413	comm2d, ierr)
[2232]	414	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%qsws )
[667]	415	ENDIF
	416	!
	417	!-- Send surface temperature to atmosphere
[1353]	418	total_2d_o = 0.0_wp
	419	total_2d = 0.0_wp
[667]	420	total_2d(nys:nyn,nxl:nxr) = pt(nzt,nys:nyn,nxl:nxr)
	421
[709]	422	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
	423	comm2d, ierr)
	424	CALL interpolate_to_atmos( 14 )
[667]	425	!
[709]	426	!-- Receive momentum flux (u) at the sea surface (top) from the atmosphere
	427	IF ( myid == 0 ) THEN
[667]	428	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
[709]	429	target_id, 15, comm_inter, status, ierr )
[667]	430	ENDIF
	431	CALL MPI_BARRIER( comm2d, ierr )
	432	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
[709]	433	0, comm2d, ierr )
[2232]	434	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%usws )
[667]	435	!
[709]	436	!-- Receive momentum flux (v) at the sea surface (top) from the atmosphere
	437	IF ( myid == 0 ) THEN
[667]	438	CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
[709]	439	target_id, 16, comm_inter, status, ierr )
[667]	440	ENDIF
	441	CALL MPI_BARRIER( comm2d, ierr )
[709]	442	CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, &
	443	ierr )
[2232]	444	CALL transfer_2D_to_1D_unequal( surf_def_h(2)%vsws )
[667]	445	!
	446	!-- Send u to atmosphere
[1353]	447	total_2d_o = 0.0_wp
	448	total_2d = 0.0_wp
[667]	449	total_2d(nys:nyn,nxl:nxr) = u(nzt,nys:nyn,nxl:nxr)
[709]	450	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
	451	comm2d, ierr )
	452	CALL interpolate_to_atmos( 17 )
[667]	453	!
	454	!-- Send v to atmosphere
[1353]	455	total_2d_o = 0.0_wp
	456	total_2d = 0.0_wp
[667]	457	total_2d(nys:nyn,nxl:nxr) = v(nzt,nys:nyn,nxl:nxr)
[709]	458	CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, &
	459	comm2d, ierr )
	460	CALL interpolate_to_atmos( 18 )
[667]	461
	462	ENDIF
	463
	464	!
	465	!-- Conversions of fluxes received from atmosphere
	466	IF ( humidity_remote ) THEN
[108]	467	!
[2232]	468	!-- Here top heat flux is still the sum of atmospheric bottom heat fluxes,
[709]	469	!-- * latent heat of vaporization in m2/s2, or 540 cal/g, or 40.65 kJ/mol
	470	!-- /(rho_atm(=1.0)*c_p)
[2232]	471	DO m = 1, surf_def_h(2)%ns
	472	i = surf_def_h(2)%i(m)
	473	j = surf_def_h(2)%j(m)
	474
	475	surf_def_h(2)%shf(m) = surf_def_h(2)%shf(m) + &
	476	surf_def_h(2)%qsws(m) * l_v / cp
[709]	477	!
[2232]	478	!-- ...and convert it to a salinity flux at the sea surface (top)
	479	!-- following Steinhorn (1991), JPO 21, pp. 1681-1683:
	480	!-- S'w' = -S * evaporation / ( rho_water * ( 1 - S ) )
	481	surf_def_h(2)%sasws(m) = -1.0_wp * sa(nzt,j,i) * 0.001_wp * &
	482	surf_def_h(2)%qsws(m) / &
	483	( rho_ocean(nzt,j,i) * &
	484	( 1.0_wp - sa(nzt,j,i) * 0.001_wp ) &
	485	)
	486	ENDDO
[108]	487	ENDIF
	488
	489	!
[102]	490	!-- Adjust the kinematic heat flux with respect to ocean density
[2232]	491	!-- (constants are the specific heat capacities for air and water), as well
	492	!-- as momentum fluxes
	493	DO m = 1, surf_def_h(2)%ns
	494	i = surf_def_h(2)%i(m)
	495	j = surf_def_h(2)%j(m)
	496	surf_def_h(2)%shf(m) = surf_def_h(2)%shf(m) / rho_ocean(nzt,j,i) * &
	497	cp / cpw
[102]	498
[2232]	499	surf_def_h(2)%usws(m) = surf_def_h(2)%usws(m) / rho_ocean(nzt,j,i)
	500	surf_def_h(2)%vsws(m) = surf_def_h(2)%vsws(m) / rho_ocean(nzt,j,i)
	501	ENDDO
[102]	502
[667]	503	ENDIF
	504
[709]	505	IF ( coupling_topology == 1 ) THEN
[667]	506	DEALLOCATE( total_2d_o, total_2d_a )
	507	ENDIF
	508
	509	CALL cpu_log( log_point(39), 'surface_coupler', 'stop' )
	510
	511	#endif
	512
[2232]	513	CONTAINS
	514
	515	! Description:
	516	!------------------------------------------------------------------------------!
	517	!> Data transfer from 1D surface-data type to 2D dummy array for equal
	518	!> grids in atmosphere and ocean.
	519	!------------------------------------------------------------------------------!
	520	SUBROUTINE transfer_1D_to_2D_equal( def_1d, lsm_1d, usm_1d )
	521
	522	IMPLICIT NONE
	523
	524	INTEGER(iwp) :: i !< running index x
	525	INTEGER(iwp) :: j !< running index y
	526	INTEGER(iwp) :: m !< running index surface type
	527
	528	REAL(wp), DIMENSION(1:surf_def_h(0)%ns) :: def_1d !< 1D surface flux, default surfaces
	529	REAL(wp), DIMENSION(1:surf_lsm_h%ns) :: lsm_1d !< 1D surface flux, natural surfaces
	530	REAL(wp), DIMENSION(1:surf_usm_h%ns) :: usm_1d !< 1D surface flux, urban surfaces
	531	!
	532	!-- Transfer surface flux at default surfaces to 2D grid
	533	DO m = 1, surf_def_h(0)%ns
	534	i = surf_def_h(0)%i(m)
	535	j = surf_def_h(0)%j(m)
	536	surface_flux(j,i) = def_1d(m)
	537	ENDDO
	538	!
	539	!-- Transfer surface flux at natural surfaces to 2D grid
	540	IF ( land_surface ) THEN
	541	DO m = 1, SIZE(lsm_1d)
	542	i = surf_lsm_h%i(m)
	543	j = surf_lsm_h%j(m)
	544	surface_flux(j,i) = lsm_1d(m)
	545	ENDDO
	546	ENDIF
	547	!
	548	!-- Transfer surface flux at natural surfaces to 2D grid
	549	IF ( urban_surface ) THEN
	550	DO m = 1, SIZE(usm_1d)
	551	i = surf_usm_h%i(m)
	552	j = surf_usm_h%j(m)
	553	surface_flux(j,i) = usm_1d(m)
	554	ENDDO
	555	ENDIF
	556
	557	END SUBROUTINE transfer_1D_to_2D_equal
	558
	559	! Description:
	560	!------------------------------------------------------------------------------!
	561	!> Data transfer from 2D array for equal grids onto 1D surface-data type
	562	!> array.
	563	!------------------------------------------------------------------------------!
	564	SUBROUTINE transfer_2D_to_1D_equal( def_1d )
	565
	566	IMPLICIT NONE
	567
	568	INTEGER(iwp) :: i !< running index x
	569	INTEGER(iwp) :: j !< running index y
	570	INTEGER(iwp) :: m !< running index surface type
	571
	572	REAL(wp), DIMENSION(1:surf_def_h(2)%ns) :: def_1d !< 1D surface flux, default surfaces
	573	!
	574	!-- Transfer surface flux to 1D surface type, only for default surfaces
	575	DO m = 1, surf_def_h(2)%ns
	576	i = surf_def_h(2)%i(m)
	577	j = surf_def_h(2)%j(m)
	578	def_1d(m) = surface_flux(j,i)
	579	ENDDO
	580
	581	END SUBROUTINE transfer_2D_to_1D_equal
	582
	583	! Description:
	584	!------------------------------------------------------------------------------!
	585	!> Data transfer from 1D surface-data type to 2D dummy array from unequal
	586	!> grids in atmosphere and ocean.
	587	!------------------------------------------------------------------------------!
	588	SUBROUTINE transfer_1D_to_2D_unequal( def_1d, lsm_1d, usm_1d )
	589
	590	IMPLICIT NONE
	591
	592	INTEGER(iwp) :: i !< running index x
	593	INTEGER(iwp) :: j !< running index y
	594	INTEGER(iwp) :: m !< running index surface type
	595
	596	REAL(wp), DIMENSION(1:surf_def_h(0)%ns) :: def_1d !< 1D surface flux, default surfaces
	597	REAL(wp), DIMENSION(1:surf_lsm_h%ns) :: lsm_1d !< 1D surface flux, natural surfaces
	598	REAL(wp), DIMENSION(1:surf_usm_h%ns) :: usm_1d !< 1D surface flux, urban surfaces
	599	!
	600	!-- Transfer surface flux at default surfaces to 2D grid. 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(0)%i(m)
	604	j = surf_def_h(0)%j(m)
	605
	606	IF ( i >= nxl .AND. i <= nxr .AND. &
	607	j >= nys .AND. j <= nyn ) THEN
	608	total_2d(j,i) = def_1d(m)
	609	ENDIF
	610	ENDDO
	611	!
	612	!-- Transfer surface flux at natural surfaces to 2D grid
	613	IF ( land_surface ) THEN
	614	DO m = 1, SIZE(lsm_1d)
	615	i = surf_lsm_h%i(m)
	616	j = surf_lsm_h%j(m)
	617
	618	IF ( i >= nxl .AND. i <= nxr .AND. &
	619	j >= nys .AND. j <= nyn ) THEN
	620	total_2d(j,i) = lsm_1d(m)
	621	ENDIF
	622	ENDDO
	623	ENDIF
	624	!
	625	!-- Transfer surface flux at natural surfaces to 2D grid
	626	IF ( urban_surface ) THEN
	627	DO m = 1, SIZE(usm_1d)
	628	i = surf_usm_h%i(m)
	629	j = surf_usm_h%j(m)
	630
	631	IF ( i >= nxl .AND. i <= nxr .AND. &
	632	j >= nys .AND. j <= nyn ) THEN
	633	total_2d(j,i) = usm_1d(m)
	634	ENDIF
	635	ENDDO
	636	ENDIF
	637
	638	END SUBROUTINE transfer_1D_to_2D_unequal
	639
	640	! Description:
	641	!------------------------------------------------------------------------------!
	642	!> Data transfer from 2D dummy array from unequal grids to 1D surface-data
	643	!> type.
	644	!------------------------------------------------------------------------------!
	645	SUBROUTINE transfer_2D_to_1D_unequal( def_1d )
	646
	647	IMPLICIT NONE
	648
	649	INTEGER(iwp) :: i !< running index x
	650	INTEGER(iwp) :: j !< running index y
	651	INTEGER(iwp) :: m !< running index surface type
	652
	653	REAL(wp), DIMENSION(1:surf_def_h(2)%ns) :: def_1d !< 1D surface flux, default surfaces
	654	!
	655	!-- Transfer 2D surface flux to default surfaces data type. Transfer no
	656	!-- ghost-grid points since total_2d is a global array.
	657	DO m = 1, SIZE(def_1d)
	658	i = surf_def_h(2)%i(m)
	659	j = surf_def_h(2)%j(m)
	660
	661	IF ( i >= nxl .AND. i <= nxr .AND. &
	662	j >= nys .AND. j <= nyn ) THEN
	663	def_1d(m) = total_2d_o(j,i)
	664	ENDIF
	665	ENDDO
	666
	667
	668	END SUBROUTINE transfer_2D_to_1D_unequal
	669
[667]	670	END SUBROUTINE surface_coupler
	671
	672
	673
[1682]	674	!------------------------------------------------------------------------------!
	675	! Description:
	676	! ------------
	677	!> @todo Missing subroutine description.
	678	!------------------------------------------------------------------------------!
[709]	679	SUBROUTINE interpolate_to_atmos( tag )
[667]	680
[880]	681	#if defined( __parallel )
	682
[1320]	683	USE arrays_3d, &
	684	ONLY: total_2d_a, total_2d_o
[667]	685
[1320]	686	USE indices, &
	687	ONLY: nbgp, nx, nx_a, nx_o, ny, ny_a, ny_o
	688
	689	USE kinds
	690
[1324]	691	USE pegrid
[1320]	692
[667]	693	IMPLICIT NONE
	694
[1682]	695	INTEGER(iwp) :: dnx !<
	696	INTEGER(iwp) :: dnx2 !<
	697	INTEGER(iwp) :: dny !<
	698	INTEGER(iwp) :: dny2 !<
	699	INTEGER(iwp) :: i !<
	700	INTEGER(iwp) :: ii !<
	701	INTEGER(iwp) :: j !<
	702	INTEGER(iwp) :: jj !<
[667]	703
[1682]	704	INTEGER(iwp), intent(in) :: tag !<
[1320]	705
[667]	706	CALL MPI_BARRIER( comm2d, ierr )
	707
[709]	708	IF ( myid == 0 ) THEN
	709	!
	710	!-- Cyclic boundary conditions for the total 2D-grid
[667]	711	total_2d_o(-nbgp:-1,:) = total_2d_o(ny+1-nbgp:ny,:)
	712	total_2d_o(:,-nbgp:-1) = total_2d_o(:,nx+1-nbgp:nx)
	713
	714	total_2d_o(ny+1:ny+nbgp,:) = total_2d_o(0:nbgp-1,:)
	715	total_2d_o(:,nx+1:nx+nbgp) = total_2d_o(:,0:nbgp-1)
	716
[102]	717	!
[667]	718	!-- Number of gridpoints of the fine grid within one mesh of the coarse grid
	719	dnx = (nx_o+1) / (nx_a+1)
	720	dny = (ny_o+1) / (ny_a+1)
[102]	721
	722	!
[709]	723	!-- Distance for interpolation around coarse grid points within the fine
	724	!-- grid (note: 2*dnx2 must not be equal with dnx)
[667]	725	dnx2 = 2 * ( dnx / 2 )
	726	dny2 = 2 * ( dny / 2 )
[102]	727
[1353]	728	total_2d_a = 0.0_wp
[102]	729	!
[667]	730	!-- Interpolation from ocean-grid-layer to atmosphere-grid-layer
	731	DO j = 0, ny_a
	732	DO i = 0, nx_a
	733	DO jj = 0, dny2
	734	DO ii = 0, dnx2
	735	total_2d_a(j,i) = total_2d_a(j,i) &
	736	+ total_2d_o(jdny+jj,idnx+ii)
	737	ENDDO
	738	ENDDO
	739	total_2d_a(j,i) = total_2d_a(j,i) / ( ( dnx2 + 1 ) * ( dny2 + 1 ) )
	740	ENDDO
	741	ENDDO
	742	!
[709]	743	!-- Cyclic boundary conditions for atmosphere grid
[667]	744	total_2d_a(-nbgp:-1,:) = total_2d_a(ny_a+1-nbgp:ny_a,:)
	745	total_2d_a(:,-nbgp:-1) = total_2d_a(:,nx_a+1-nbgp:nx_a)
	746
	747	total_2d_a(ny_a+1:ny_a+nbgp,:) = total_2d_a(0:nbgp-1,:)
	748	total_2d_a(:,nx_a+1:nx_a+nbgp) = total_2d_a(:,0:nbgp-1)
	749	!
	750	!-- Transfer of the atmosphere-grid-layer to the atmosphere
[709]	751	CALL MPI_SEND( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, target_id, &
	752	tag, comm_inter, ierr )
[102]	753
	754	ENDIF
	755
[667]	756	CALL MPI_BARRIER( comm2d, ierr )
[102]	757
[880]	758	#endif
	759
[667]	760	END SUBROUTINE interpolate_to_atmos
[102]	761
[667]	762
[1682]	763	!------------------------------------------------------------------------------!
	764	! Description:
	765	! ------------
	766	!> @todo Missing subroutine description.
	767	!------------------------------------------------------------------------------!
[709]	768	SUBROUTINE interpolate_to_ocean( tag )
[667]	769
[880]	770	#if defined( __parallel )
	771
[1320]	772	USE arrays_3d, &
	773	ONLY: total_2d_a, total_2d_o
[667]	774
[1320]	775	USE indices, &
	776	ONLY: nbgp, nx, nx_a, nx_o, ny, ny_a, ny_o
	777
	778	USE kinds
	779
[1324]	780	USE pegrid
[1320]	781
[667]	782	IMPLICIT NONE
	783
[1682]	784	INTEGER(iwp) :: dnx !<
	785	INTEGER(iwp) :: dny !<
	786	INTEGER(iwp) :: i !<
	787	INTEGER(iwp) :: ii !<
	788	INTEGER(iwp) :: j !<
	789	INTEGER(iwp) :: jj !<
	790	INTEGER(iwp), intent(in) :: tag !<
[667]	791
[1682]	792	REAL(wp) :: fl !<
	793	REAL(wp) :: fr !<
	794	REAL(wp) :: myl !<
	795	REAL(wp) :: myr !<
[709]	796
[667]	797	CALL MPI_BARRIER( comm2d, ierr )
	798
[709]	799	IF ( myid == 0 ) THEN
[667]	800
	801	!
[709]	802	!-- Number of gridpoints of the fine grid within one mesh of the coarse grid
[667]	803	dnx = ( nx_o + 1 ) / ( nx_a + 1 )
	804	dny = ( ny_o + 1 ) / ( ny_a + 1 )
	805
	806	!
[709]	807	!-- Cyclic boundary conditions for atmosphere grid
[667]	808	total_2d_a(-nbgp:-1,:) = total_2d_a(ny+1-nbgp:ny,:)
	809	total_2d_a(:,-nbgp:-1) = total_2d_a(:,nx+1-nbgp:nx)
	810
	811	total_2d_a(ny+1:ny+nbgp,:) = total_2d_a(0:nbgp-1,:)
	812	total_2d_a(:,nx+1:nx+nbgp) = total_2d_a(:,0:nbgp-1)
	813	!
[709]	814	!-- Bilinear Interpolation from atmosphere grid-layer to ocean grid-layer
[667]	815	DO j = 0, ny
	816	DO i = 0, nx
	817	myl = ( total_2d_a(j+1,i) - total_2d_a(j,i) ) / dny
	818	myr = ( total_2d_a(j+1,i+1) - total_2d_a(j,i+1) ) / dny
	819	DO jj = 0, dny-1
[709]	820	fl = myl*jj + total_2d_a(j,i)
	821	fr = myr*jj + total_2d_a(j,i+1)
[667]	822	DO ii = 0, dnx-1
	823	total_2d_o(jdny+jj,idnx+ii) = ( fr - fl ) / dnx * ii + fl
	824	ENDDO
	825	ENDDO
	826	ENDDO
	827	ENDDO
	828	!
[709]	829	!-- Cyclic boundary conditions for ocean grid
[667]	830	total_2d_o(-nbgp:-1,:) = total_2d_o(ny_o+1-nbgp:ny_o,:)
	831	total_2d_o(:,-nbgp:-1) = total_2d_o(:,nx_o+1-nbgp:nx_o)
	832
	833	total_2d_o(ny_o+1:ny_o+nbgp,:) = total_2d_o(0:nbgp-1,:)
	834	total_2d_o(:,nx_o+1:nx_o+nbgp) = total_2d_o(:,0:nbgp-1)
	835
	836	CALL MPI_SEND( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, &
	837	target_id, tag, comm_inter, ierr )
	838
	839	ENDIF
	840
	841	CALL MPI_BARRIER( comm2d, ierr )
	842
[880]	843	#endif
	844
[667]	845	END SUBROUTINE interpolate_to_ocean

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