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nemogcm.F90 @ 9012

Last change on this file since 9012 was 9012, checked in by acc, 6 years ago
Branch dev_CNRS_2017. Merge in no_ghost changes from dev_r8126_ROBUST08_no_ghost. These changes include lib_mpp refresh and rationalisation of mppini from dev_r8126_ROBUST10_MPPINI
Property svn:keywords set to `Id`
File size: 28.6 KB

Rev	Line
[2496]	1	MODULE nemogcm
[2442]	2	!!======================================================================
[2496]	3	!! * MODULE nemogcm *
	4	!! Ocean system : NEMO GCM (ocean dynamics, on-line tracers, biochemistry and sea-ice)
[2442]	5	!!======================================================================
[7646]	6	!! History : 3.6 ! 2015-12 (A. Ryan) Original code (from OPA_SRC/)
	7	!! 4.0 ! 2016-11 (G. Madec, S. Flavoni) domain configuration / user defined interface
[1593]	8	!!----------------------------------------------------------------------
[3]	9
	10	!!----------------------------------------------------------------------
[7646]	11	!! nemo_gcm : solve ocean dynamics, tracer, biogeochemistry and/or sea-ice
	12	!! nemo_init : initialization of the NEMO system
	13	!! nemo_ctl : initialisation of the contol print
	14	!! nemo_closefile: close remaining open files
	15	!! nemo_alloc : dynamical allocation
	16	!! nemo_partition: calculate MPP domain decomposition
	17	!! factorise : calculate the factors of the no. of MPI processes
[3]	18	!!----------------------------------------------------------------------
[7646]	19	USE step_oce ! module used in the ocean time stepping module (step.F90)
	20	USE domain ! domain initialization (dom_init & dom_cfg routines)
	21	USE istate ! initial state setting (istate_init routine)
	22	USE phycst ! physical constant (par_cst routine)
	23	USE step ! NEMO time-stepping (stp routine)
	24	USE cpl_oasis3 ! OASIS3 coupling
	25	USE diaobs ! Observation diagnostics (dia_obs_init routine)
[3625]	26	#if defined key_nemocice_decomp
	27	USE ice_domain_size, only: nx_global, ny_global
	28	#endif
[7646]	29	! ! Stand Alone Observation operator modules
	30	USE sao_data
	31	USE sao_intp
	32	!
	33	USE lib_mpp ! distributed memory computing
	34	USE mppini ! shared/distributed memory setting (mpp_init routine)
	35	USE lbcnfd , ONLY : isendto, nsndto, nfsloop, nfeloop ! Setup of north fold exchanges
	36	USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined)
[1412]	37	#if defined key_iomput
[7646]	38	USE xios ! xIOserver
[1359]	39	#endif
[268]	40
[2715]	41	IMPLICIT NONE
[3]	42	PRIVATE
	43
[4829]	44	PUBLIC nemo_gcm ! called by model.F90
[2496]	45	PUBLIC nemo_init ! needed by AGRIF
[3764]	46	PUBLIC nemo_alloc ! needed by TAM
[467]	47
[2498]	48	CHARACTER(lc) :: cform_aaa="( /, 'AAAAAAAA', / ) " ! flag for output listing
[1593]	49
[3]	50	!!----------------------------------------------------------------------
[7646]	51	!! NEMO/OPA 4.0 , NEMO Consortium (2016)
[2392]	52	!! $Id$
[2329]	53	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
[3]	54	!!----------------------------------------------------------------------
	55	CONTAINS
	56
[4120]	57	SUBROUTINE nemo_gcm
	58	!!----------------------------------------------------------------------
	59	!! * SUBROUTINE offline_obs_oper *
	60	!!
	61	!! ** Purpose : To use NEMO components to interpolate model fields
	62	!! to observation space.
	63	!!
	64	!! ** Method : 1. Initialise NEMO
	65	!! 2. Initialise offline obs_oper
	66	!! 3. Cycle through match ups
	67	!! 4. Write results to file
	68	!!----------------------------------------------------------------------
[7646]	69	!
	70	CALL nemo_init ! Initialise NEMO
	71	!
	72	CALL sao_data_init ! Initialise Stand Alone Observation operator data
	73	!
	74	CALL dia_obs_init ! Initialise obs_operator
	75	!
	76	CALL sao_interp ! Interpolate to observation space
	77	!
	78	CALL dia_obs_wri ! Pipe to output files
	79	!
	80	CALL dia_obs_dealloc ! Reset the obs_oper between
	81	!
	82	IF(lk_mpp) CALL mppstop ! Safely stop MPI (end mpp communications)
	83	!
[4120]	84	END SUBROUTINE nemo_gcm
[389]	85
[4829]	86
[2496]	87	SUBROUTINE nemo_init
[389]	88	!!----------------------------------------------------------------------
[2496]	89	!! * ROUTINE nemo_init *
[389]	90	!!
[2496]	91	!! ** Purpose : initialization of the NEMO GCM
[389]	92	!!----------------------------------------------------------------------
[7646]	93	INTEGER :: ji ! dummy loop indices
	94	INTEGER :: ios, ilocal_comm ! local integer
[9012]	95	INTEGER :: iiarea, ijarea ! local integers
	96	INTEGER :: iirest, ijrest ! local integers
[7646]	97	CHARACTER(len=120), DIMENSION(30) :: cltxt, cltxt2, clnam
[5600]	98	!
[7646]	99	NAMELIST/namctl/ ln_ctl , nn_print, nn_ictls, nn_ictle, &
	100	& nn_isplt , nn_jsplt, nn_jctls, nn_jctle, &
[8882]	101	& ln_timing, ln_diacfl
[7646]	102	NAMELIST/namcfg/ ln_read_cfg, cn_domcfg, ln_write_cfg, cn_domcfg_out, ln_use_jattr
[3]	103	!!----------------------------------------------------------------------
[1593]	104	!
[7646]	105	cltxt = ''
	106	cltxt2 = ''
	107	clnam = ''
[5600]	108	cxios_context = 'nemo'
[2496]	109	!
[4290]	110	! ! Open reference namelist and configuration namelist files
	111	CALL ctl_opn( numnam_ref, 'namelist_ref', 'OLD', 'FORMATTED', 'SEQUENTIAL', -1, 6, .FALSE. )
	112	CALL ctl_opn( numnam_cfg, 'namelist_cfg', 'OLD', 'FORMATTED', 'SEQUENTIAL', -1, 6, .FALSE. )
[1593]	113	!
[7646]	114	REWIND( numnam_ref ) ! Namelist namctl in reference namelist : Control prints
[4290]	115	READ ( numnam_ref, namctl, IOSTAT = ios, ERR = 901 )
	116	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namctl in reference namelist', .TRUE. )
[7646]	117	!
	118	REWIND( numnam_cfg ) ! Namelist namctl in confguration namelist
[4290]	119	READ ( numnam_cfg, namctl, IOSTAT = ios, ERR = 902 )
	120	902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namctl in configuration namelist', .TRUE. )
[1593]	121	!
[7646]	122	REWIND( numnam_ref ) ! Namelist namcfg in reference namelist : Control prints
[4290]	123	READ ( numnam_ref, namcfg, IOSTAT = ios, ERR = 903 )
	124	903 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namcfg in reference namelist', .TRUE. )
	125
	126	REWIND( numnam_cfg ) ! Namelist namcfg in confguration namelist : Control prints & Benchmark
	127	READ ( numnam_cfg, namcfg, IOSTAT = ios, ERR = 904 )
	128	904 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namcfg in configuration namelist', .TRUE. )
	129
[7646]	130	! !--------------------------!
	131	! ! Set global domain size ! (control print return in cltxt2)
	132	! !--------------------------!
	133	IF( ln_read_cfg ) THEN ! Read sizes in domain configuration file
	134	CALL domain_cfg ( cltxt2, cn_cfg, nn_cfg, jpiglo, jpjglo, jpkglo, jperio )
	135	!
	136	ELSE ! user-defined namelist
	137	CALL usr_def_nam( cltxt2, clnam, cn_cfg, nn_cfg, jpiglo, jpjglo, jpkglo, jperio )
	138	ENDIF
	139	!
	140	jpk = jpkglo
	141	!
[4829]	142	#if defined key_agrif
[7646]	143	IF( .NOT. Agrif_Root() ) THEN ! AGRIF children: specific setting (cf. agrif_user.F90)
	144	jpiglo = nbcellsx + 2 + 2*nbghostcells
	145	jpjglo = nbcellsy + 2 + 2*nbghostcells
	146	jpi = ( jpiglo-2jpreci + (jpni-1+0) ) / jpni + 2jpreci
	147	jpj = ( jpjglo-2jprecj + (jpnj-1+0) ) / jpnj + 2jprecj
	148	nperio = 0
	149	jperio = 0
	150	ln_use_jattr = .false.
	151	ENDIF
[4829]	152	#endif
	153	!
[1593]	154	! !--------------------------------------------!
	155	! ! set communicator & select the local node !
[4624]	156	! ! NB: mynode also opens output.namelist.dyn !
	157	! ! on unit number numond on first proc !
[1593]	158	! !--------------------------------------------!
[1412]	159	#if defined key_iomput
[2200]	160	IF( Agrif_Root() ) THEN
[5600]	161	IF( lk_oasis ) THEN
	162	CALL cpl_init( "oceanx", ilocal_comm ) ! nemo local communicator given by oasis
	163	CALL xios_initialize( "not used",local_comm=ilocal_comm ) ! send nemo communicator to xios
	164	ELSE
	165	CALL xios_initialize( "for_xios_mpi_id",return_comm=ilocal_comm ) ! nemo local communicator given by xios
	166	ENDIF
[2200]	167	ENDIF
[5600]	168	! Nodes selection (control print return in cltxt)
	169	narea = mynode( cltxt, 'output.namelist.dyn', numnam_ref, numnam_cfg, numond , nstop, ilocal_comm )
[532]	170	#else
[5600]	171	IF( lk_oasis ) THEN
	172	IF( Agrif_Root() ) THEN
	173	CALL cpl_init( "oceanx", ilocal_comm ) ! nemo local communicator given by oasis
	174	ENDIF
	175	! Nodes selection (control print return in cltxt)
	176	narea = mynode( cltxt, 'output.namelist.dyn', numnam_ref, numnam_cfg, numond , nstop, ilocal_comm )
	177	ELSE
	178	ilocal_comm = 0
	179	! Nodes selection (control print return in cltxt)
	180	narea = mynode( cltxt, 'output.namelist.dyn', numnam_ref, numnam_cfg, numond , nstop )
[2236]	181	ENDIF
[532]	182	#endif
[7646]	183
[2715]	184	narea = narea + 1 ! mynode return the rank of proc (0 --> jpnij -1 )
[3]	185
[4624]	186	lwm = (narea == 1) ! control of output namelists
[2715]	187	lwp = (narea == 1) .OR. ln_ctl ! control of all listing output print
[1579]	188
[4624]	189	IF(lwm) THEN
	190	! write merged namelists from earlier to output namelist now that the
	191	! file has been opened in call to mynode. nammpp has already been
	192	! written in mynode (if lk_mpp_mpi)
	193	WRITE( numond, namctl )
	194	WRITE( numond, namcfg )
[7646]	195	IF( .NOT.ln_read_cfg ) THEN
	196	DO ji = 1, SIZE(clnam)
	197	IF( TRIM(clnam(ji)) /= '' ) WRITE(numond, * ) clnam(ji) ! namusr_def print
	198	END DO
	199	ENDIF
[4624]	200	ENDIF
	201
[3764]	202	! If dimensions of processor grid weren't specified in the namelist file
[2715]	203	! then we calculate them here now that we have our communicator size
[7646]	204	IF( jpni < 1 .OR. jpnj < 1 ) THEN
[2715]	205	#if defined key_mpp_mpi
[7646]	206	IF( Agrif_Root() ) CALL nemo_partition( mppsize )
[2715]	207	#else
	208	jpni = 1
	209	jpnj = 1
	210	jpnij = jpni*jpnj
	211	#endif
[7646]	212	ENDIF
[9012]	213	!
	214	#if defined key_agrif
	215	IF( .NOT. Agrif_Root() ) THEN ! AGRIF children: specific setting (cf. agrif_user.F90)
	216	jpiglo = nbcellsx + 2 + 2*nbghostcells
	217	jpjglo = nbcellsy + 2 + 2*nbghostcells
	218	jpi = ( jpiglo-2nn_hls + (jpni-1+0) ) / jpni + 2nn_hls
	219	jpj = ( jpjglo-2nn_hls + (jpnj-1+0) ) / jpnj + 2nn_hls
	220	jpimax = jpi
	221	jpjmax = jpj
	222	nperio = 0
	223	jperio = 0
	224	ln_use_jattr = .false.
	225	ENDIF
	226	#endif
[2715]	227
[7646]	228	IF( Agrif_Root() ) THEN ! AGRIF mother: specific setting from jpni and jpnj
[9012]	229	iiarea = 1 + MOD( narea - 1 , jpni )
	230	ijarea = 1 + ( narea - 1 ) / jpni
	231	iirest = 1 + MOD( jpiglo - 2*nn_hls - 1 , jpni )
	232	ijrest = 1 + MOD( jpjglo - 2*nn_hls - 1 , jpnj )
[3294]	233	#if defined key_nemocice_decomp
[9012]	234	jpi = ( nx_global+2-2nn_hls + (jpni-1) ) / jpni + 2nn_hls ! first dim.
	235	jpj = ( ny_global+2-2nn_hls + (jpnj-1) ) / jpnj + 2nn_hls ! second dim.
	236	jpimax = jpi
	237	jpjmax = jpj
	238	IF( iiarea == jpni ) jpi = jpiglo - (jpni - 1) * (jpi - 2*nn_hls)
	239	IF( ijarea == jpnj ) jpj = jpjglo - (jpnj - 1) * (jpj - 2*nn_hls)
[3294]	240	#else
[9012]	241	jpi = ( jpiglo -2nn_hls + (jpni-1) ) / jpni + 2nn_hls ! first dim.
	242	jpj = ( jpjglo -2nn_hls + (jpnj-1) ) / jpnj + 2nn_hls ! second dim.
	243	jpimax = jpi
	244	jpjmax = jpj
	245	IF( iiarea > iirest ) jpi = jpi - 1
	246	IF( ijarea > ijrest ) jpj = jpj - 1
[3294]	247	#endif
[4829]	248	ENDIF
[2715]	249
[7646]	250	jpk = jpkglo ! third dim
[9012]	251
	252	#if defined key_agrif
	253	! simple trick to use same vertical grid as parent but different number of levels:
	254	! Save maximum number of levels in jpkglo, then define all vertical grids with this number.
	255	! Suppress once vertical online interpolation is ok
	256	IF(.NOT.Agrif_Root()) jpkglo = Agrif_Parent( jpkglo )
	257	#endif
[7646]	258	jpim1 = jpi-1 ! inner domain indices
	259	jpjm1 = jpj-1 ! " "
[9012]	260	jpkm1 = MAX( 1, jpk-1 ) ! " "
[7646]	261	jpij = jpi*jpj ! jpi x j
	262
[1593]	263	IF(lwp) THEN ! open listing units
	264	!
[1581]	265	CALL ctl_opn( numout, 'ocean.output', 'REPLACE', 'FORMATTED', 'SEQUENTIAL', -1, 6, .FALSE., narea )
[1593]	266	!
[1579]	267	WRITE(numout,*)
[3294]	268	WRITE(numout,*) ' CNRS - NERC - Met OFFICE - MERCATOR-ocean - INGV - CMCC'
[1593]	269	WRITE(numout,*) ' NEMO team'
[5042]	270	WRITE(numout,*) ' Stand Alone Observation operator'
[7646]	271	WRITE(numout,*) ' NEMO version 3.7 (2015) '
[1579]	272	WRITE(numout,*)
	273	WRITE(numout,*)
[3764]	274	DO ji = 1, SIZE(cltxt)
[7646]	275	IF( TRIM(cltxt (ji)) /= '' ) WRITE(numout,*) cltxt(ji) ! control print of mynode
[1579]	276	END DO
[7646]	277	WRITE(numout,*)
	278	WRITE(numout,*)
	279	DO ji = 1, SIZE(cltxt2)
	280	IF( TRIM(cltxt2(ji)) /= '' ) WRITE(numout,*) cltxt2(ji) ! control print of domain size
	281	END DO
[1593]	282	!
[7646]	283	WRITE(numout,cform_aaa) ! Flag AAAAAAA
	284	!
[473]	285	ENDIF
[2715]	286
[7646]	287	! Now we know the dimensions of the grid and numout has been set: we can allocate arrays
[2715]	288	CALL nemo_alloc()
	289
[2496]	290	! !-------------------------------!
	291	! ! NEMO general initialization !
	292	! !-------------------------------!
[473]	293
[8882]	294	CALL nemo_ctl ! Control prints & Benchmark
[531]	295
[9012]	296	! ! Domain decomposition
	297	CALL mpp_init
[2382]	298	!
[8882]	299	IF( ln_timing ) CALL timing_init ! timing by routine
[3294]	300	!
[8882]	301	! ! General initialization
	302	CALL phy_cst ! Physical constants
	303	CALL eos_init ! Equation of state
	304	CALL dom_init ! Domain
[413]	305
[8882]	306	IF( ln_nnogather ) CALL nemo_northcomms ! Initialise the northfold neighbour lists (must be done after the masks are defined)
[3294]	307
[8882]	308	IF( ln_ctl ) CALL prt_ctl_init ! Print control
[2027]	309
[8882]	310	CALL istate_init ! ocean initial state (Dynamics and tracers)
[2496]	311	END SUBROUTINE nemo_init
[467]	312
	313
[2496]	314	SUBROUTINE nemo_ctl
[467]	315	!!----------------------------------------------------------------------
[2496]	316	!! * ROUTINE nemo_ctl *
[467]	317	!!
[3764]	318	!! ** Purpose : control print setting
[467]	319	!!
[2442]	320	!! ** Method : - print namctl information and check some consistencies
[467]	321	!!----------------------------------------------------------------------
[2442]	322	!
[2496]	323	IF(lwp) THEN ! control print
[531]	324	WRITE(numout,*)
[7646]	325	WRITE(numout,*) 'nemo_ctl: Control prints'
[531]	326	WRITE(numout,*) '~~~~~~~ '
[1593]	327	WRITE(numout,*) ' Namelist namctl'
[1601]	328	WRITE(numout,*) ' run control (for debugging) ln_ctl = ', ln_ctl
	329	WRITE(numout,*) ' level of print nn_print = ', nn_print
	330	WRITE(numout,*) ' Start i indice for SUM control nn_ictls = ', nn_ictls
	331	WRITE(numout,*) ' End i indice for SUM control nn_ictle = ', nn_ictle
	332	WRITE(numout,*) ' Start j indice for SUM control nn_jctls = ', nn_jctls
	333	WRITE(numout,*) ' End j indice for SUM control nn_jctle = ', nn_jctle
	334	WRITE(numout,*) ' number of proc. following i nn_isplt = ', nn_isplt
	335	WRITE(numout,*) ' number of proc. following j nn_jsplt = ', nn_jsplt
[8882]	336	WRITE(numout,*) ' timing by routine ln_timing = ', ln_timing
	337	WRITE(numout,*) ' CFL diagnostics ln_diacfl = ', ln_diacfl
[531]	338	ENDIF
[2442]	339	!
[1601]	340	nprint = nn_print ! convert DOCTOR namelist names into OLD names
	341	nictls = nn_ictls
	342	nictle = nn_ictle
	343	njctls = nn_jctls
	344	njctle = nn_jctle
	345	isplt = nn_isplt
	346	jsplt = nn_jsplt
[4829]	347
	348	IF(lwp) THEN ! control print
	349	WRITE(numout,*)
	350	WRITE(numout,*) 'namcfg : configuration initialization through namelist read'
	351	WRITE(numout,*) '~~~~~~~ '
	352	WRITE(numout,*) ' Namelist namcfg'
[7646]	353	WRITE(numout,*) ' read domain configuration file ln_read_cfg = ', ln_read_cfg
	354	WRITE(numout,*) ' filename to be read cn_domcfg = ', TRIM(cn_domcfg)
	355	WRITE(numout,*) ' write configuration definition file ln_write_cfg = ', ln_write_cfg
	356	WRITE(numout,*) ' filename to be written cn_domcfg_out = ', TRIM(cn_domcfg_out)
	357	WRITE(numout,*) ' use file attribute if exists as i/p j-start ln_use_jattr = ', ln_use_jattr
[4829]	358	ENDIF
[2442]	359	! ! Parameter control
[1593]	360	!
	361	IF( ln_ctl ) THEN ! sub-domain area indices for the control prints
[3294]	362	IF( lk_mpp .AND. jpnij > 1 ) THEN
[2496]	363	isplt = jpni ; jsplt = jpnj ; ijsplt = jpni*jpnj ! the domain is forced to the real split domain
[531]	364	ELSE
	365	IF( isplt == 1 .AND. jsplt == 1 ) THEN
[1593]	366	CALL ctl_warn( ' - isplt & jsplt are equal to 1', &
	367	& ' - the print control will be done over the whole domain' )
[531]	368	ENDIF
[1593]	369	ijsplt = isplt * jsplt ! total number of processors ijsplt
[531]	370	ENDIF
	371	IF(lwp) WRITE(numout,*)' - The total number of processors over which the'
	372	IF(lwp) WRITE(numout,*)' print control will be done is ijsplt : ', ijsplt
[1593]	373	!
	374	! ! indices used for the SUM control
	375	IF( nictls+nictle+njctls+njctle == 0 ) THEN ! print control done over the default area
[3764]	376	lsp_area = .FALSE.
[1593]	377	ELSE ! print control done over a specific area
[531]	378	lsp_area = .TRUE.
	379	IF( nictls < 1 .OR. nictls > jpiglo ) THEN
	380	CALL ctl_warn( ' - nictls must be 1<=nictls>=jpiglo, it is forced to 1' )
	381	nictls = 1
	382	ENDIF
	383	IF( nictle < 1 .OR. nictle > jpiglo ) THEN
	384	CALL ctl_warn( ' - nictle must be 1<=nictle>=jpiglo, it is forced to jpiglo' )
	385	nictle = jpiglo
	386	ENDIF
	387	IF( njctls < 1 .OR. njctls > jpjglo ) THEN
	388	CALL ctl_warn( ' - njctls must be 1<=njctls>=jpjglo, it is forced to 1' )
	389	njctls = 1
	390	ENDIF
	391	IF( njctle < 1 .OR. njctle > jpjglo ) THEN
	392	CALL ctl_warn( ' - njctle must be 1<=njctle>=jpjglo, it is forced to jpjglo' )
	393	njctle = jpjglo
	394	ENDIF
[1593]	395	ENDIF
	396	ENDIF
[2442]	397	!
[3764]	398	IF( 1_wp /= SIGN(1._wp,-0._wp) ) CALL ctl_stop( 'nemo_ctl: The intrinsec SIGN function follows ', &
	399	& 'f2003 standard. ' , &
	400	& 'Compile with key_nosignedzero enabled' )
	401	!
[2496]	402	END SUBROUTINE nemo_ctl
[467]	403
	404
[2496]	405	SUBROUTINE nemo_closefile
[467]	406	!!----------------------------------------------------------------------
[2496]	407	!! * ROUTINE nemo_closefile *
[467]	408	!!
	409	!! ** Purpose : Close the files
	410	!!----------------------------------------------------------------------
[1593]	411	!
	412	IF( lk_mpp ) CALL mppsync
	413	!
[1685]	414	CALL iom_close ! close all input/output files managed by iom_*
[1593]	415	!
[4829]	416	IF( numstp /= -1 ) CLOSE( numstp ) ! time-step file
[9012]	417	IF( numrun /= -1 ) CLOSE( numrun ) ! run statistics file
[4829]	418	IF( numnam_ref /= -1 ) CLOSE( numnam_ref ) ! oce reference namelist
	419	IF( numnam_cfg /= -1 ) CLOSE( numnam_cfg ) ! oce configuration namelist
	420	IF( lwm.AND.numond /= -1 ) CLOSE( numond ) ! oce output namelist
	421	IF( numnam_ice_ref /= -1 ) CLOSE( numnam_ice_ref ) ! ice reference namelist
	422	IF( numnam_ice_cfg /= -1 ) CLOSE( numnam_ice_cfg ) ! ice configuration namelist
	423	IF( lwm.AND.numoni /= -1 ) CLOSE( numoni ) ! ice output namelist
	424	IF( numevo_ice /= -1 ) CLOSE( numevo_ice ) ! ice variables (temp. evolution)
	425	IF( numout /= 6 ) CLOSE( numout ) ! standard model output file
	426	IF( numdct_vol /= -1 ) CLOSE( numdct_vol ) ! volume transports
	427	IF( numdct_heat /= -1 ) CLOSE( numdct_heat ) ! heat transports
	428	IF( numdct_salt /= -1 ) CLOSE( numdct_salt ) ! salt transports
[1593]	429	!
[2442]	430	numout = 6 ! redefine numout in case it is used after this point...
	431	!
[2496]	432	END SUBROUTINE nemo_closefile
[467]	433
[2715]	434
	435	SUBROUTINE nemo_alloc
	436	!!----------------------------------------------------------------------
	437	!! * ROUTINE nemo_alloc *
	438	!!
	439	!! ** Purpose : Allocate all the dynamic arrays of the OPA modules
	440	!!
	441	!! ** Method :
	442	!!----------------------------------------------------------------------
	443	USE diawri , ONLY: dia_wri_alloc
	444	USE dom_oce , ONLY: dom_oce_alloc
	445	!
	446	INTEGER :: ierr
	447	!!----------------------------------------------------------------------
	448	!
[3764]	449	ierr = oce_alloc () ! ocean
[2715]	450	ierr = ierr + dia_wri_alloc ()
	451	ierr = ierr + dom_oce_alloc () ! ocean domain
	452	!
	453	IF( lk_mpp ) CALL mpp_sum( ierr )
	454	IF( ierr /= 0 ) CALL ctl_stop( 'STOP', 'nemo_alloc : unable to allocate standard ocean arrays' )
	455	!
	456	END SUBROUTINE nemo_alloc
	457
	458
	459	SUBROUTINE nemo_partition( num_pes )
	460	!!----------------------------------------------------------------------
	461	!! * ROUTINE nemo_partition *
	462	!!
[3764]	463	!! ** Purpose :
[2715]	464	!!
	465	!! ** Method :
	466	!!----------------------------------------------------------------------
[7646]	467	INTEGER, INTENT(in) :: num_pes ! The number of MPI processes we have
[2715]	468	!
	469	INTEGER, PARAMETER :: nfactmax = 20
	470	INTEGER :: nfact ! The no. of factors returned
	471	INTEGER :: ierr ! Error flag
	472	INTEGER :: ji
	473	INTEGER :: idiff, mindiff, imin ! For choosing pair of factors that are closest in value
	474	INTEGER, DIMENSION(nfactmax) :: ifact ! Array of factors
	475	!!----------------------------------------------------------------------
[5600]	476	!
[2715]	477	ierr = 0
[5600]	478	!
[2715]	479	CALL factorise( ifact, nfactmax, nfact, num_pes, ierr )
[5600]	480	!
[2715]	481	IF( nfact <= 1 ) THEN
	482	WRITE (numout, *) 'WARNING: factorisation of number of PEs failed'
	483	WRITE (numout, *) ' : using grid of ',num_pes,' x 1'
	484	jpnj = 1
	485	jpni = num_pes
	486	ELSE
	487	! Search through factors for the pair that are closest in value
	488	mindiff = 1000000
	489	imin = 1
	490	DO ji = 1, nfact-1, 2
	491	idiff = ABS( ifact(ji) - ifact(ji+1) )
	492	IF( idiff < mindiff ) THEN
	493	mindiff = idiff
	494	imin = ji
	495	ENDIF
	496	END DO
	497	jpnj = ifact(imin)
	498	jpni = ifact(imin + 1)
	499	ENDIF
	500	!
	501	jpnij = jpni*jpnj
	502	!
	503	END SUBROUTINE nemo_partition
	504
	505
	506	SUBROUTINE factorise( kfax, kmaxfax, knfax, kn, kerr )
	507	!!----------------------------------------------------------------------
	508	!! * ROUTINE factorise *
	509	!!
	510	!! ** Purpose : return the prime factors of n.
[3764]	511	!! knfax factors are returned in array kfax which is of
[2715]	512	!! maximum dimension kmaxfax.
	513	!! ** Method :
	514	!!----------------------------------------------------------------------
	515	INTEGER , INTENT(in ) :: kn, kmaxfax
	516	INTEGER , INTENT( out) :: kerr, knfax
	517	INTEGER, DIMENSION(kmaxfax), INTENT( out) :: kfax
	518	!
	519	INTEGER :: ifac, jl, inu
	520	INTEGER, PARAMETER :: ntest = 14
[7646]	521	INTEGER, DIMENSION(ntest) :: ilfax
	522	!!----------------------------------------------------------------------
[5600]	523	!
[2715]	524	! lfax contains the set of allowed factors.
[7646]	525	ilfax(:) = (/(2**jl,jl=ntest,1,-1)/)
	526	!
[2715]	527	! Clear the error flag and initialise output vars
[7646]	528	kerr = 0
	529	kfax = 1
[2715]	530	knfax = 0
[7646]	531	!
[2715]	532	! Find the factors of n.
[8528]	533	IF( kn .NE. 1 ) THEN
[2715]	534
[8528]	535	! nu holds the unfactorised part of the number.
	536	! knfax holds the number of factors found.
	537	! l points to the allowed factor list.
	538	! ifac holds the current factor.
[2715]	539	!
[8528]	540	inu = kn
	541	knfax = 0
	542	!
	543	DO jl = ntest, 1, -1
[2715]	544	!
[8528]	545	ifac = ilfax(jl)
	546	IF( ifac > inu ) CYCLE
	547
	548	! Test whether the factor will divide.
	549
	550	IF( MOD(inu,ifac) == 0 ) THEN
	551	!
	552	knfax = knfax + 1 ! Add the factor to the list
	553	IF( knfax > kmaxfax ) THEN
	554	kerr = 6
	555	write (,) 'FACTOR: insufficient space in factor array ', knfax
	556	return
	557	ENDIF
	558	kfax(knfax) = ifac
	559	! Store the other factor that goes with this one
	560	knfax = knfax + 1
	561	kfax(knfax) = inu / ifac
	562	!WRITE (,) 'ARPDBG, factors ',knfax-1,' & ',knfax,' are ', kfax(knfax-1),' and ',kfax(knfax)
[2715]	563	ENDIF
[8528]	564	!
	565	END DO
[2715]	566	!
[8528]	567	ENDIF
[7646]	568	!
[2715]	569	END SUBROUTINE factorise
	570
[3294]	571	#if defined key_mpp_mpi
[5600]	572
[3294]	573	SUBROUTINE nemo_northcomms
[7646]	574	!!----------------------------------------------------------------------
[3294]	575	!! * ROUTINE nemo_northcomms *
[7646]	576	!! ** Purpose : Setup for north fold exchanges with explicit
	577	!! point-to-point messaging
[3764]	578	!!
[7646]	579	!! ** Method : Initialization of the northern neighbours lists.
[3294]	580	!!----------------------------------------------------------------------
[3764]	581	!! 1.0 ! 2011-10 (A. C. Coward, NOCS & J. Donners, PRACE)
[4829]	582	!! 2.0 ! 2013-06 Setup avoiding MPI communication (I. Epicoco, S. Mocavero, CMCC)
[3294]	583	!!----------------------------------------------------------------------
[4829]	584	INTEGER :: sxM, dxM, sxT, dxT, jn
	585	INTEGER :: njmppmax
[7646]	586	!!----------------------------------------------------------------------
	587	!
[4829]	588	njmppmax = MAXVAL( njmppt )
[7646]	589	!
[4829]	590	!initializes the north-fold communication variables
	591	isendto(:) = 0
[7646]	592	nsndto = 0
	593	!
[4829]	594	!if I am a process in the north
	595	IF ( njmpp == njmppmax ) THEN
	596	!sxM is the first point (in the global domain) needed to compute the
	597	!north-fold for the current process
	598	sxM = jpiglo - nimppt(narea) - nlcit(narea) + 1
	599	!dxM is the last point (in the global domain) needed to compute the
	600	!north-fold for the current process
	601	dxM = jpiglo - nimppt(narea) + 2
[3294]	602
[4829]	603	!loop over the other north-fold processes to find the processes
	604	!managing the points belonging to the sxT-dxT range
[5600]	605
	606	DO jn = 1, jpni
[4829]	607	!sxT is the first point (in the global domain) of the jn
	608	!process
[5600]	609	sxT = nfiimpp(jn, jpnj)
[4829]	610	!dxT is the last point (in the global domain) of the jn
	611	!process
[5600]	612	dxT = nfiimpp(jn, jpnj) + nfilcit(jn, jpnj) - 1
[4829]	613	IF ((sxM .gt. sxT) .AND. (sxM .lt. dxT)) THEN
	614	nsndto = nsndto + 1
[7646]	615	isendto(nsndto) = jn
[4829]	616	ELSEIF ((sxM .le. sxT) .AND. (dxM .ge. dxT)) THEN
	617	nsndto = nsndto + 1
[7646]	618	isendto(nsndto) = jn
[4829]	619	ELSEIF ((dxM .lt. dxT) .AND. (sxT .lt. dxM)) THEN
	620	nsndto = nsndto + 1
[7646]	621	isendto(nsndto) = jn
	622	ENDIF
[4829]	623	END DO
[5600]	624	nfsloop = 1
	625	nfeloop = nlci
	626	DO jn = 2,jpni-1
	627	IF(nfipproc(jn,jpnj) .eq. (narea - 1)) THEN
	628	IF (nfipproc(jn - 1 ,jpnj) .eq. -1) THEN
	629	nfsloop = nldi
	630	ENDIF
	631	IF (nfipproc(jn + 1,jpnj) .eq. -1) THEN
	632	nfeloop = nlei
	633	ENDIF
	634	ENDIF
	635	END DO
	636
[3294]	637	ENDIF
[4829]	638	l_north_nogather = .TRUE.
[3294]	639	END SUBROUTINE nemo_northcomms
[7646]	640
[3294]	641	#else
	642	SUBROUTINE nemo_northcomms ! Dummy routine
	643	WRITE(,) 'nemo_northcomms: You should not have seen this print! error?'
	644	END SUBROUTINE nemo_northcomms
	645	#endif
[5600]	646
[3]	647	!!======================================================================
[2496]	648	END MODULE nemogcm
[4829]	649

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