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step.F90 @ 11180

Last change on this file since 11180 was 11180, checked in by clne, 5 years ago
Initial commit of code for 2d (surge) work in NEMO4. This is aiming to replicate the 3.6 version in branches/UKMO/dev_r5518_Surge_Modelling
File size: 20.1 KB

Rev	Line
[3]	1	MODULE step
	2	!!======================================================================
	3	!! * MODULE step *
[6140]	4	!! Time-stepping : manager of the ocean, tracer and ice time stepping
[3]	5	!!======================================================================
[1438]	6	!! History : OPA ! 1991-03 (G. Madec) Original code
[1492]	7	!! - ! 1991-11 (G. Madec)
	8	!! - ! 1992-06 (M. Imbard) add a first output record
	9	!! - ! 1996-04 (G. Madec) introduction of dynspg
	10	!! - ! 1996-04 (M.A. Foujols) introduction of passive tracer
[1438]	11	!! 8.0 ! 1997-06 (G. Madec) new architecture of call
	12	!! 8.2 ! 1997-06 (G. Madec, M. Imbard, G. Roullet) free surface
	13	!! - ! 1999-02 (G. Madec, N. Grima) hpg implicit
	14	!! - ! 2000-07 (J-M Molines, M. Imbard) Open Bondary Conditions
	15	!! NEMO 1.0 ! 2002-06 (G. Madec) free form, suppress macro-tasking
	16	!! - ! 2004-08 (C. Talandier) New trends organization
[1492]	17	!! - ! 2005-01 (C. Ethe) Add the KPP closure scheme
	18	!! - ! 2005-11 (G. Madec) Reorganisation of tra and dyn calls
	19	!! - ! 2006-01 (L. Debreu, C. Mazauric) Agrif implementation
	20	!! - ! 2006-07 (S. Masson) restart using iom
[1438]	21	!! 3.2 ! 2009-02 (G. Madec, R. Benshila) reintroduicing z*-coordinate
[1533]	22	!! - ! 2009-06 (S. Masson, G. Madec) TKE restart compatible with key_cpl
[2528]	23	!! 3.3 ! 2010-05 (K. Mogensen, A. Weaver, M. Martin, D. Lea) Assimilation interface
	24	!! - ! 2010-10 (C. Ethe, G. Madec) reorganisation of initialisation phase + merge TRC-TRA
[3294]	25	!! 3.4 ! 2011-04 (G. Madec, C. Ethe) Merge of dtatem and dtasal
[5836]	26	!! 3.6 ! 2012-07 (J. Simeon, G. Madec. C. Ethe) Online coarsening of outputs
	27	!! 3.6 ! 2014-04 (F. Roquet, G. Madec) New equations of state
[7646]	28	!! 3.6 ! 2014-10 (E. Clementi, P. Oddo) Add Qiao vertical mixing in case of waves
[5836]	29	!! 3.7 ! 2014-10 (G. Madec) LDF simplication
	30	!! - ! 2014-12 (G. Madec) remove KPP scheme
[9019]	31	!! - ! 2015-11 (J. Chanut) free surface simplification (remove filtered free surface)
	32	!! 4.0 ! 2017-05 (G. Madec) introduction of the vertical physics manager (zdfphy)
[3]	33	!!----------------------------------------------------------------------
[888]	34
	35	!!----------------------------------------------------------------------
[2528]	36	!! stp : OPA system time-stepping
[3]	37	!!----------------------------------------------------------------------
[3764]	38	USE step_oce ! time stepping definition modules
[6140]	39	!
	40	USE iom ! xIOs server
[389]	41
[3]	42	IMPLICIT NONE
	43	PRIVATE
	44
[5836]	45	PUBLIC stp ! called by nemogcm.F90
[3]	46
	47	!!----------------------------------------------------------------------
[9598]	48	!! NEMO/OCE 4.0 , NEMO Consortium (2018)
[888]	49	!! $Id$
[10068]	50	!! Software governed by the CeCILL license (see ./LICENSE)
[3]	51	!!----------------------------------------------------------------------
	52	CONTAINS
	53
[508]	54	#if defined key_agrif
[5656]	55	RECURSIVE SUBROUTINE stp( )
[1438]	56	INTEGER :: kstp ! ocean time-step index
[508]	57	#else
[467]	58	SUBROUTINE stp( kstp )
[1438]	59	INTEGER, INTENT(in) :: kstp ! ocean time-step index
[467]	60	#endif
	61	!!----------------------------------------------------------------------
[3]	62	!! * ROUTINE stp *
[3764]	63	!!
[9019]	64	!! ** Purpose : - Time stepping of OPA (momentum and active tracer eqs.)
[9570]	65	!! - Time stepping of SI3 (dynamic and thermodynamic eqs.)
[9019]	66	!! - Time stepping of TRC (passive tracer eqs.)
[3764]	67	!!
	68	!! ** Method : -1- Update forcings and data
	69	!! -2- Update ocean physics
	70	!! -3- Compute the t and s trends
	71	!! -4- Update t and s
[3]	72	!! -5- Compute the momentum trends
	73	!! -6- Update the horizontal velocity
[5836]	74	!! -7- Compute the diagnostics variables (rd,N2, hdiv,w)
[3]	75	!! -8- Outputs and diagnostics
	76	!!----------------------------------------------------------------------
[9019]	77	INTEGER :: ji, jj, jk ! dummy loop indice
	78	INTEGER :: indic ! error indicator if < 0
	79	!!gm kcall can be removed, I guess
	80	INTEGER :: kcall ! optional integer argument (dom_vvl_sf_nxt)
[3]	81	!! ---------------------------------------------------------------------
[392]	82	#if defined key_agrif
[389]	83	kstp = nit000 + Agrif_Nb_Step()
[5836]	84	IF( lk_agrif_debug ) THEN
	85	IF( Agrif_Root() .and. lwp) WRITE(,) '---'
	86	IF(lwp) WRITE(,) 'Grid Number', Agrif_Fixed(),' time step ', kstp, 'int tstep', Agrif_NbStepint()
[5656]	87	ENDIF
[5836]	88	IF( kstp == nit000 + 1 ) lk_agrif_fstep = .FALSE.
[1793]	89	# if defined key_iomput
[5407]	90	IF( Agrif_Nbstepint() == 0 ) CALL iom_swap( cxios_context )
[3764]	91	# endif
	92	#endif
[9124]	93	!
	94	IF( ln_timing ) CALL timing_start('stp')
	95	!
[5836]	96	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	97	! update I/O and calendar
	98	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	99	indic = 0 ! reset to no error condition
	100
	101	IF( kstp == nit000 ) THEN ! initialize IOM context (must be done after nemo_init for AGRIF+XIOS+OASIS)
	102	CALL iom_init( cxios_context ) ! for model grid (including passible AGRIF zoom)
	103	IF( ln_crs ) CALL iom_init( TRIM(cxios_context)//"_crs" ) ! for coarse grid
[4152]	104	ENDIF
[1725]	105	IF( kstp /= nit000 ) CALL day( kstp ) ! Calendar (day was already called at nit000 in day_init)
[5836]	106	CALL iom_setkt( kstp - nit000 + 1, cxios_context ) ! tell IOM we are at time step kstp
	107	IF( ln_crs ) CALL iom_setkt( kstp - nit000 + 1, TRIM(cxios_context)//"_crs" ) ! tell IOM we are at time step kstp
[3]	108
	109	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5836]	110	! Update external forcing (tides, open boundaries, and surface boundary condition (including sea-ice)
[3]	111	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[7646]	112	IF( ln_tide ) CALL sbc_tide( kstp ) ! update tide potential
[5836]	113	IF( ln_apr_dyn ) CALL sbc_apr ( kstp ) ! atmospheric pressure (NB: call before bdy_dta which needs ssh_ib)
[7646]	114	IF( ln_bdy ) CALL bdy_dta ( kstp, time_offset=+1 ) ! update dynamic & tracer data at open boundaries
[5836]	115	CALL sbc ( kstp ) ! Sea Boundary Condition (including sea-ice)
	116
[3]	117	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5329]	118	! Update stochastic parameters and random T/S fluctuations
	119	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[6464]	120	IF( ln_sto_eos ) CALL sto_par( kstp ) ! Stochastic parameters
	121	IF( ln_sto_eos ) CALL sto_pts( tsn ) ! Random T/S fluctuations
[5329]	122
	123	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[9490]	124	! Ocean physics update
[3]	125	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[4990]	126	! THERMODYNAMICS
[11180]	127	IF ( .NOT. ln_2d ) THEN
[4990]	128	CALL eos_rab( tsb, rab_b ) ! before local thermal/haline expension ratio at T-points
	129	CALL eos_rab( tsn, rab_n ) ! now local thermal/haline expension ratio at T-points
	130	CALL bn2 ( tsb, rab_b, rn2b ) ! before Brunt-Vaisala frequency
	131	CALL bn2 ( tsn, rab_n, rn2 ) ! now Brunt-Vaisala frequency
[11180]	132	ENDIF
	133
[3764]	134	! VERTICAL PHYSICS
[9019]	135	CALL zdf_phy( kstp ) ! vertical physics update (top/bot drag, avt, avs, avm + MLD)
[5836]	136
[3764]	137	! LATERAL PHYSICS
[1492]	138	!
[5836]	139	IF( l_ldfslp ) THEN ! slope of lateral mixing
[5120]	140	CALL eos( tsb, rhd, gdept_0(:,:,:) ) ! before in situ density
[5836]	141
[5120]	142	IF( ln_zps .AND. .NOT. ln_isfcav) &
	143	& CALL zps_hde ( kstp, jpts, tsb, gtsu, gtsv, & ! Partial steps: before horizontal gradient
	144	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
[5836]	145
[5120]	146	IF( ln_zps .AND. ln_isfcav) &
[6140]	147	& CALL zps_hde_isf( kstp, jpts, tsb, gtsu, gtsv, gtui, gtvi, & ! Partial steps for top cell (ISF)
	148	& rhd, gru , grv , grui, grvi ) ! of t, s, rd at the first ocean level
[5836]	149	IF( ln_traldf_triad ) THEN
	150	CALL ldf_slp_triad( kstp ) ! before slope for triad operator
	151	ELSE
	152	CALL ldf_slp ( kstp, rhd, rn2b ) ! before slope for standard operator
[2528]	153	ENDIF
[1481]	154	ENDIF
[6381]	155	! ! eddy diffusivity coeff.
	156	IF( l_ldftra_time .OR. l_ldfeiv_time ) CALL ldf_tra( kstp ) ! and/or eiv coeff.
	157	IF( l_ldfdyn_time ) CALL ldf_dyn( kstp ) ! eddy viscosity coeff.
[3]	158
[4369]	159	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5930]	160	! Ocean dynamics : hdiv, ssh, e3, u, v, w
[4369]	161	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5930]	162
[6140]	163	CALL ssh_nxt ( kstp ) ! after ssh (includes call to div_hor)
[10364]	164	IF( .NOT.ln_linssh ) CALL dom_vvl_sf_nxt( kstp ) ! after vertical scale factors
[6140]	165	CALL wzv ( kstp ) ! now cross-level velocity
[10364]	166	IF( ln_zad_Aimp ) CALL wAimp ( kstp ) ! Adaptive-implicit vertical advection partitioning
[11180]	167	IF( .NOT. ln_2d ) CALL eos ( tsn, rhd, rhop, gdept_n(:,:,:) ) ! now in situ density for hpg computation
[6140]	168
[5930]	169	!!jc: fs simplification
[6140]	170	!!jc: lines below are useless if ln_linssh=F. Keep them here (which maintains a bug if ln_linssh=T and ln_zps=T, cf ticket #1636)
[5930]	171	!! but ensures reproductible results
	172	!! with previous versions using split-explicit free surface
[6140]	173	IF( ln_zps .AND. .NOT. ln_isfcav ) &
	174	& CALL zps_hde ( kstp, jpts, tsn, gtsu, gtsv, & ! Partial steps: before horizontal gradient
	175	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
	176	IF( ln_zps .AND. ln_isfcav ) &
	177	& CALL zps_hde_isf( kstp, jpts, tsn, gtsu, gtsv, gtui, gtvi, & ! Partial steps for top cell (ISF)
	178	& rhd, gru , grv , grui, grvi ) ! of t, s, rd at the first ocean level
[5930]	179	!!jc: fs simplification
[7753]	180
	181	ua(:,:,:) = 0._wp ! set dynamics trends to zero
	182	va(:,:,:) = 0._wp
[4369]	183
[5930]	184	IF( lk_asminc .AND. ln_asmiau .AND. ln_dyninc ) &
[6381]	185	& CALL dyn_asm_inc ( kstp ) ! apply dynamics assimilation increment
[7646]	186	IF( ln_bdy ) CALL bdy_dyn3d_dmp ( kstp ) ! bdy damping trends
[4369]	187	#if defined key_agrif
[5930]	188	IF(.NOT. Agrif_Root()) &
	189	& CALL Agrif_Sponge_dyn ! momentum sponge
[4369]	190	#endif
[5930]	191	CALL dyn_adv ( kstp ) ! advection (vector or flux form)
	192	CALL dyn_vor ( kstp ) ! vorticity term including Coriolis
	193	CALL dyn_ldf ( kstp ) ! lateral mixing
[9019]	194	IF( ln_zdfosm ) CALL dyn_osm ( kstp ) ! OSMOSIS non-local velocity fluxes
[5930]	195	CALL dyn_hpg ( kstp ) ! horizontal gradient of Hydrostatic pressure
	196	CALL dyn_spg ( kstp ) ! surface pressure gradient
[4369]	197
[5930]	198	! With split-explicit free surface, since now transports have been updated and ssha as well
	199	IF( ln_dynspg_ts ) THEN ! vertical scale factors and vertical velocity need to be updated
	200	CALL div_hor ( kstp ) ! Horizontal divergence (2nd call in time-split case)
[6140]	201	IF(.NOT.ln_linssh) CALL dom_vvl_sf_nxt( kstp, kcall=2 ) ! after vertical scale factors (update depth average component)
[5930]	202	CALL wzv ( kstp ) ! now cross-level velocity
[10364]	203	IF( ln_zad_Aimp ) CALL wAimp ( kstp ) ! Adaptive-implicit vertical advection partitioning
[4369]	204	ENDIF
[9019]	205
[11180]	206	IF( .NOT. ln_2d ) CALL dyn_zdf ( kstp ) ! vertical diffusion
[5930]	207
[1482]	208	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[6140]	209	! cool skin
	210	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	211	IF ( ln_diurnal ) CALL stp_diurnal( kstp )
	212
	213	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[9490]	214	! diagnostics and outputs
[1482]	215	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[9490]	216	IF( lk_floats ) CALL flo_stp ( kstp ) ! drifting Floats
	217	IF( ln_diacfl ) CALL dia_cfl ( kstp ) ! Courant number diagnostics
	218	IF( lk_diahth ) CALL dia_hth ( kstp ) ! Thermocline depth (20 degres isotherm depth)
	219	IF( lk_diadct ) CALL dia_dct ( kstp ) ! Transports
	220	CALL dia_ar5 ( kstp ) ! ar5 diag
[6140]	221	IF( lk_diaharm ) CALL dia_harm( kstp ) ! Tidal harmonic analysis
[9490]	222	CALL dia_wri ( kstp ) ! ocean model: outputs
[4152]	223	!
[5930]	224	IF( ln_crs ) CALL crs_fld ( kstp ) ! ocean model: online field coarsening & output
[6140]	225
[923]	226	#if defined key_top
[3]	227	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	228	! Passive Tracer Model
	229	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5930]	230	CALL trc_stp ( kstp ) ! time-stepping
[3]	231	#endif
	232
	233	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5930]	234	! Active tracers
[3]	235	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[11180]	236	IF (.NOT. ln_2d) THEN ! No tracers in 2D mode
[7753]	237	tsa(:,:,:,:) = 0._wp ! set tracer trends to zero
[3]	238
[5656]	239	IF( lk_asminc .AND. ln_asmiau .AND. &
[5930]	240	& ln_trainc ) CALL tra_asm_inc ( kstp ) ! apply tracer assimilation increment
	241	CALL tra_sbc ( kstp ) ! surface boundary condition
	242	IF( ln_traqsr ) CALL tra_qsr ( kstp ) ! penetrative solar radiation qsr
	243	IF( ln_trabbc ) CALL tra_bbc ( kstp ) ! bottom heat flux
[9019]	244	IF( ln_trabbl ) CALL tra_bbl ( kstp ) ! advective (and/or diffusive) bottom boundary layer scheme
[5930]	245	IF( ln_tradmp ) CALL tra_dmp ( kstp ) ! internal damping trends
[7646]	246	IF( ln_bdy ) CALL bdy_tra_dmp ( kstp ) ! bdy damping trends
[392]	247	#if defined key_agrif
[5930]	248	IF(.NOT. Agrif_Root()) &
	249	& CALL Agrif_Sponge_tra ! tracers sponge
[389]	250	#endif
[5930]	251	CALL tra_adv ( kstp ) ! horizontal & vertical advection
[9019]	252	IF( ln_zdfosm ) CALL tra_osm ( kstp ) ! OSMOSIS non-local tracer fluxes
	253	IF( lrst_oce .AND. ln_zdfosm ) &
	254	& CALL osm_rst( kstp, 'WRITE' )! write OSMOSIS outputs + wn (so must do here) to restarts
[5930]	255	CALL tra_ldf ( kstp ) ! lateral mixing
[1239]	256
[5930]	257	!!gm : why CALL to dia_ptr has been moved here??? (use trends info?)
	258	IF( ln_diaptr ) CALL dia_ptr ! Poleward adv/ldf TRansports diagnostics
[5836]	259	!!gm
[5930]	260	CALL tra_zdf ( kstp ) ! vertical mixing and after tracer fields
	261	IF( ln_zdfnpc ) CALL tra_npc ( kstp ) ! update after fields by non-penetrative convection
[11180]	262	ENDIF ! not ln_2d
	263
[3]	264	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5930]	265	! Set boundary conditions and Swap
[3]	266	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5930]	267	!!jc1: For agrif, it would be much better to finalize tracers/momentum here (e.g. bdy conditions) and move the swap
	268	!! (and time filtering) after Agrif update. Then restart would be done after and would contain updated fields.
	269	!! If so:
	270	!! (i) no need to call agrif update at initialization time
	271	!! (ii) no need to update "before" fields
	272	!!
	273	!! Apart from creating new tra_swp/dyn_swp routines, this however:
	274	!! (i) makes boundary conditions at initialization time computed from updated fields which is not the case between
	275	!! two restarts => restartability issue. One can circumvent this, maybe, by assuming "interface separation",
	276	!! e.g. a shift of the feedback interface inside child domain.
	277	!! (ii) requires that all restart outputs of updated variables by agrif (e.g. passive tracers/tke/barotropic arrays) are done at the same
	278	!! place.
	279	!!
[6140]	280	!!jc2: dynnxt must be the latest call. e3t_b are indeed updated in that routine
[11180]	281	IF (.NOT. ln_2d) CALL tra_nxt ( kstp ) ! finalize (bcs) tracer fields at next time step and swap
[9250]	282	CALL dyn_nxt ( kstp ) ! finalize (bcs) velocities at next time step and swap (always called after tra_nxt)
[5930]	283	CALL ssh_swp ( kstp ) ! swap of sea surface height
[6140]	284	IF(.NOT.ln_linssh) CALL dom_vvl_sf_swp( kstp ) ! swap of vertical scale factors
[5656]	285	!
[9210]	286	IF( ln_diahsb ) CALL dia_hsb ( kstp ) ! - ML - global conservation diagnostics
[5836]	287
	288	!!gm : This does not only concern the dynamics ==>>> add a new title
	289	!!gm2: why ouput restart before AGRIF update?
[5930]	290	!!
	291	!!jc: That would be better, but see comment above
	292	!!
[9210]	293	IF( lrst_oce ) CALL rst_write ( kstp ) ! write output ocean restart file
	294	IF( ln_sto_eos ) CALL sto_rst_write( kstp ) ! write restart file for stochastic parameters
[593]	295
[5656]	296	#if defined key_agrif
	297	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	298	! AGRIF
	299	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[9485]	300	CALL Agrif_Integrate_ChildGrids( stp ) ! allows to finish all the Child Grids before updating
[5656]	301
[9780]	302	IF( Agrif_NbStepint() == 0 ) CALL Agrif_update_all( ) ! Update all components
[9485]	303	#endif
[9210]	304	IF( ln_diaobs ) CALL dia_obs ( kstp ) ! obs-minus-model (assimilation) diagnostics (call after dynamics update)
[2528]	305
[3]	306	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5656]	307	! Control
[3]	308	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[9210]	309	CALL stp_ctl ( kstp, indic )
	310
	311	IF( kstp == nit000 ) THEN ! 1st time step only
	312	CALL iom_close( numror ) ! close input ocean restart file
	313	IF(lwm) CALL FLUSH ( numond ) ! flush output namelist oce
	314	IF(lwm .AND. numoni /= -1 ) CALL FLUSH ( numoni ) ! flush output namelist ice (if exist)
[1482]	315	ENDIF
[3]	316
[508]	317	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[75]	318	! Coupled mode
	319	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5836]	320	!!gm why lk_oasis and not lk_cpl ????
[5930]	321	IF( lk_oasis ) CALL sbc_cpl_snd( kstp ) ! coupled mode : field exchanges
[508]	322	!
[4153]	323	#if defined key_iomput
	324	IF( kstp == nitend .OR. indic < 0 ) THEN
[5407]	325	CALL iom_context_finalize( cxios_context ) ! needed for XIOS+AGRIF
[9367]	326	IF(lrxios) CALL iom_context_finalize( crxios_context )
[5407]	327	IF( ln_crs ) CALL iom_context_finalize( trim(cxios_context)//"_crs" ) !
[4152]	328	ENDIF
[4153]	329	#endif
[3769]	330	!
[9210]	331	IF( ln_timing ) CALL timing_stop('stp')
[1481]	332	!
[3]	333	END SUBROUTINE stp
[6140]	334
[9019]	335	!!======================================================================
[3]	336	END MODULE step

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