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step.F90 in branches/2014/dev_r4650_UKMO12_CFL_diags_take2/NEMOGCM/NEMO/OPA_SRC – NEMO

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source: branches/2014/dev_r4650_UKMO12_CFL_diags_take2/NEMOGCM/NEMO/OPA_SRC/step.F90 @ 5948

Last change on this file since 5948 was 5948, checked in by timgraham, 8 years ago
Merged in head of trunk (r5936)
Property svn:keywords set to `Id`
File size: 20.8 KB

Rev	Line
[3]	1	MODULE step
	2	!!======================================================================
	3	!! * MODULE step *
	4	!! Time-stepping : manager of the ocean, tracer and ice time stepping
	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
[5948]	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
	28	!! 3.7 ! 2014-10 (G. Madec) LDF simplication
	29	!! - ! 2014-12 (G. Madec) remove KPP scheme
	30	!! - ! 2015-11 (J. Chanut) free surface simplification
[3]	31	!!----------------------------------------------------------------------
[888]	32
	33	!!----------------------------------------------------------------------
[2528]	34	!! stp : OPA system time-stepping
[3]	35	!!----------------------------------------------------------------------
[3764]	36	USE step_oce ! time stepping definition modules
[5832]	37	USE iom
[389]	38
[3]	39	IMPLICIT NONE
	40	PRIVATE
	41
[5948]	42	PUBLIC stp ! called by nemogcm.F90
[3]	43
	44	!! * Substitutions
	45	# include "domzgr_substitute.h90"
[5832]	46	!!gm # include "zdfddm_substitute.h90"
[3]	47	!!----------------------------------------------------------------------
[5948]	48	!! NEMO/OPA 3.7 , NEMO Consortium (2015)
[888]	49	!! $Id$
[2528]	50	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
[3]	51	!!----------------------------------------------------------------------
	52	CONTAINS
	53
[508]	54	#if defined key_agrif
[5948]	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	!!
[3]	64	!! ** Purpose : - Time stepping of OPA (momentum and active tracer eqs.)
	65	!! - Time stepping of LIM (dynamic and thermodynamic eqs.)
	66	!! - Tme 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
[5948]	74	!! -7- Compute the diagnostics variables (rd,N2, hdiv,w)
[3]	75	!! -8- Outputs and diagnostics
	76	!!----------------------------------------------------------------------
[888]	77	INTEGER :: jk ! dummy loop indice
[3]	78	INTEGER :: indic ! error indicator if < 0
[4338]	79	INTEGER :: kcall ! optional integer argument (dom_vvl_sf_nxt)
[3]	80	!! ---------------------------------------------------------------------
[392]	81	#if defined key_agrif
[389]	82	kstp = nit000 + Agrif_Nb_Step()
[5948]	83	IF( lk_agrif_debug ) THEN
	84	IF( Agrif_Root() .and. lwp) WRITE(,) '---'
	85	IF(lwp) WRITE(,) 'Grid Number', Agrif_Fixed(),' time step ', kstp, 'int tstep', Agrif_NbStepint()
	86	ENDIF
	87	IF( kstp == nit000 + 1 ) lk_agrif_fstep = .FALSE.
[1793]	88	# if defined key_iomput
[5832]	89	IF( Agrif_Nbstepint() == 0 ) CALL iom_swap( cxios_context )
[3764]	90	# endif
	91	#endif
[5948]	92	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	93	! update I/O and calendar
	94	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	95	indic = 0 ! reset to no error condition
	96
	97	IF( kstp == nit000 ) THEN ! initialize IOM context (must be done after nemo_init for AGRIF+XIOS+OASIS)
	98	CALL iom_init( cxios_context ) ! for model grid (including passible AGRIF zoom)
	99	IF( ln_crs ) CALL iom_init( TRIM(cxios_context)//"_crs" ) ! for coarse grid
[4152]	100	ENDIF
[1725]	101	IF( kstp /= nit000 ) CALL day( kstp ) ! Calendar (day was already called at nit000 in day_init)
[5948]	102	CALL iom_setkt( kstp - nit000 + 1, cxios_context ) ! tell IOM we are at time step kstp
	103	IF( ln_crs ) CALL iom_setkt( kstp - nit000 + 1, TRIM(cxios_context)//"_crs" ) ! tell IOM we are at time step kstp
[3]	104
	105	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5948]	106	! Update external forcing (tides, open boundaries, and surface boundary condition (including sea-ice)
[3]	107	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5948]	108	IF( lk_tide ) CALL sbc_tide( kstp ) ! update tide potential
	109	IF( ln_apr_dyn ) CALL sbc_apr ( kstp ) ! atmospheric pressure (NB: call before bdy_dta which needs ssh_ib)
	110	IF( lk_bdy ) CALL bdy_dta ( kstp, time_offset=+1 ) ! update dynamic & tracer data at open boundaries
	111	CALL sbc ( kstp ) ! Sea Boundary Condition (including sea-ice)
	112
[5832]	113	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	114	! Update stochastic parameters and random T/S fluctuations
	115	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5948]	116	CALL sto_par( kstp ) ! Stochastic parameters
[3]	117
	118	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[3294]	119	! Ocean physics update (ua, va, tsa used as workspace)
[3]	120	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5832]	121	! THERMODYNAMICS
	122	CALL eos_rab( tsb, rab_b ) ! before local thermal/haline expension ratio at T-points
	123	CALL eos_rab( tsn, rab_n ) ! now local thermal/haline expension ratio at T-points
	124	CALL bn2 ( tsb, rab_b, rn2b ) ! before Brunt-Vaisala frequency
	125	CALL bn2 ( tsn, rab_n, rn2 ) ! now Brunt-Vaisala frequency
[5948]	126
[1492]	127	!
[3764]	128	! VERTICAL PHYSICS
[4369]	129	CALL zdf_bfr( kstp ) ! bottom friction (if quadratic)
[1492]	130	! ! Vertical eddy viscosity and diffusivity coefficients
[2528]	131	IF( lk_zdfric ) CALL zdf_ric( kstp ) ! Richardson number dependent Kz
	132	IF( lk_zdftke ) CALL zdf_tke( kstp ) ! TKE closure scheme for Kz
	133	IF( lk_zdfgls ) CALL zdf_gls( kstp ) ! GLS closure scheme for Kz
[4292]	134	IF( lk_zdfcst ) THEN ! Constant Kz (reset avt, avm[uv] to the background value)
[5832]	135	avt (:,:,:) = rn_avt0 * wmask (:,:,:)
	136	avmu(:,:,:) = rn_avm0 * wumask(:,:,:)
	137	avmv(:,:,:) = rn_avm0 * wvmask(:,:,:)
[677]	138	ENDIF
[5948]	139
[1492]	140	IF( ln_rnf_mouth ) THEN ! increase diffusivity at rivers mouths
[5948]	141	DO jk = 2, nkrnf ; avt(:,:,jk) = avt(:,:,jk) + 2._wp * rn_avt_rnf * rnfmsk(:,:) * tmask(:,:,jk) ; END DO
[3]	142	ENDIF
[1492]	143	IF( ln_zdfevd ) CALL zdf_evd( kstp ) ! enhanced vertical eddy diffusivity
[3]	144
[1492]	145	IF( lk_zdftmx ) CALL zdf_tmx( kstp ) ! tidal vertical mixing
[3]	146
[5948]	147	IF( lk_zdfddm ) CALL zdf_ddm( kstp ) ! double diffusive mixing
[3764]	148
[1492]	149	CALL zdf_mxl( kstp ) ! mixed layer depth
[3]	150
[2528]	151	! write TKE or GLS information in the restart file
[1531]	152	IF( lrst_oce .AND. lk_zdftke ) CALL tke_rst( kstp, 'WRITE' )
[2528]	153	IF( lrst_oce .AND. lk_zdfgls ) CALL gls_rst( kstp, 'WRITE' )
[1492]	154	!
[3764]	155	! LATERAL PHYSICS
[1492]	156	!
[5948]	157	IF( l_ldfslp ) THEN ! slope of lateral mixing
	158	!!gm : why this here ????
[5832]	159	IF(ln_sto_eos ) CALL sto_pts( tsn ) ! Random T/S fluctuations
[5948]	160	!!gm
[5832]	161	CALL eos( tsb, rhd, gdept_0(:,:,:) ) ! before in situ density
[5948]	162
[5832]	163	IF( ln_zps .AND. .NOT. ln_isfcav) &
	164	& CALL zps_hde ( kstp, jpts, tsb, gtsu, gtsv, & ! Partial steps: before horizontal gradient
	165	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
[5948]	166
[5832]	167	IF( ln_zps .AND. ln_isfcav) &
[5948]	168	& CALL zps_hde_isf( kstp, jpts, tsb, gtsu, gtsv, gtui, gtvi, & ! Partial steps for top cell (ISF)
[5832]	169	& rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , &
[5948]	170	& grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi ) ! of t, s, rd at the first ocean level
	171
	172	IF( ln_traldf_triad ) THEN
	173	CALL ldf_slp_triad( kstp ) ! before slope for triad operator
	174	ELSE
	175	CALL ldf_slp ( kstp, rhd, rn2b ) ! before slope for standard operator
[2528]	176	ENDIF
[1481]	177	ENDIF
[5948]	178	! ! eddy diffusivity coeff. and/or eiv coeff.
	179	IF( l_ldftra_time .OR. l_ldfeiv_time ) CALL ldf_tra( kstp )
[3]	180
[4369]	181	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5948]	182	! Ocean dynamics : hdiv, ssh, e3, u, v, w
[4369]	183	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5948]	184
	185	CALL ssh_nxt ( kstp ) ! after ssh (includes call to div_hor)
[4387]	186	IF( lk_vvl ) CALL dom_vvl_sf_nxt( kstp ) ! after vertical scale factors
	187	CALL wzv ( kstp ) ! now cross-level velocity
[3634]	188
[5948]	189	!!gm : why also here ????
	190	IF(ln_sto_eos ) CALL sto_pts( tsn ) ! Random T/S fluctuations
	191	!!gm
	192	CALL eos ( tsn, rhd, rhop, fsdept_n(:,:,:) ) ! now in situ density for hpg computation
	193
	194	!!jc: fs simplification
	195	!!jc: lines below are useless if lk_vvl=T. Keep them here (which maintains a bug if lk_vvl=F and ln_zps=T, cf ticket #1636)
	196	!! but ensures reproductible results
	197	!! with previous versions using split-explicit free surface
	198	IF( ln_zps .AND. .NOT. ln_isfcav) & ! Partial steps: bottom before horizontal gradient
	199	& CALL zps_hde ( kstp, jpts, tsn, gtsu, gtsv, & ! of t, s, rd at the last ocean level
	200	& rhd, gru , grv )
	201	IF( ln_zps .AND. ln_isfcav) & ! Partial steps: top & bottom before horizontal gradient
	202	& CALL zps_hde_isf( kstp, jpts, tsn, gtsu, gtsv, gtui, gtvi, &
[5832]	203	& rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , &
[5948]	204	& grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi )
	205	!!jc: fs simplification
	206
	207	ua(:,:,:) = 0._wp ! set dynamics trends to zero
	208	va(:,:,:) = 0._wp
[4369]	209
[5948]	210	IF( lk_asminc .AND. ln_asmiau .AND. ln_dyninc ) &
	211	CALL dyn_asm_inc ( kstp ) ! apply dynamics assimilation increment
	212	IF( lk_bdy ) CALL bdy_dyn3d_dmp ( kstp ) ! bdy damping trends
[4369]	213	#if defined key_agrif
[5948]	214	IF(.NOT. Agrif_Root()) &
	215	& CALL Agrif_Sponge_dyn ! momentum sponge
[4369]	216	#endif
[5948]	217	CALL dyn_adv ( kstp ) ! advection (vector or flux form)
	218	CALL dyn_vor ( kstp ) ! vorticity term including Coriolis
	219	CALL dyn_ldf ( kstp ) ! lateral mixing
	220	CALL dyn_hpg ( kstp ) ! horizontal gradient of Hydrostatic pressure
	221	CALL dyn_spg ( kstp ) ! surface pressure gradient
[4369]	222
[5948]	223	! With split-explicit free surface, since now transports have been updated and ssha as well
	224	IF( ln_dynspg_ts ) THEN ! vertical scale factors and vertical velocity need to be updated
	225	CALL div_hor ( kstp ) ! Horizontal divergence (2nd call in time-split case)
	226	IF( lk_vvl ) CALL dom_vvl_sf_nxt( kstp, kcall=2 ) ! after vertical scale factors (update depth average component)
	227	CALL wzv ( kstp ) ! now cross-level velocity
[4369]	228	ENDIF
	229
[5948]	230	CALL dyn_bfr ( kstp ) ! bottom friction
	231	CALL dyn_zdf ( kstp ) ! vertical diffusion
	232
[1482]	233	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5948]	234	! diagnostics and outputs
[1482]	235	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[1492]	236	IF( lk_floats ) CALL flo_stp( kstp ) ! drifting Floats
[4714]	237	IF( nn_diacfl == 1 ) CALL dia_cfl( kstp ) ! Courant number diagnostics
[1492]	238	IF( lk_diahth ) CALL dia_hth( kstp ) ! Thermocline depth (20 degres isotherm depth)
	239	IF( lk_diafwb ) CALL dia_fwb( kstp ) ! Fresh water budget diagnostics
[3294]	240	IF( lk_diadct ) CALL dia_dct( kstp ) ! Transports
[1756]	241	IF( lk_diaar5 ) CALL dia_ar5( kstp ) ! ar5 diag
[3294]	242	IF( lk_diaharm ) CALL dia_harm( kstp ) ! Tidal harmonic analysis
[1635]	243	CALL dia_wri( kstp ) ! ocean model: outputs
[4152]	244	!
[5948]	245	IF( ln_crs ) CALL crs_fld ( kstp ) ! ocean model: online field coarsening & output
[1482]	246
[923]	247	#if defined key_top
[3]	248	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	249	! Passive Tracer Model
	250	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5948]	251	CALL trc_stp ( kstp ) ! time-stepping
[3]	252	#endif
	253
	254	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5948]	255	! Active tracers
[3]	256	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5948]	257	tsa(:,:,:,:) = 0._wp ! set tracer trends to zero
[3]	258
[5948]	259	IF( lk_asminc .AND. ln_asmiau .AND. &
	260	& ln_trainc ) CALL tra_asm_inc ( kstp ) ! apply tracer assimilation increment
	261	CALL tra_sbc ( kstp ) ! surface boundary condition
	262	IF( ln_traqsr ) CALL tra_qsr ( kstp ) ! penetrative solar radiation qsr
	263	IF( ln_trabbc ) CALL tra_bbc ( kstp ) ! bottom heat flux
	264	IF( lk_trabbl ) CALL tra_bbl ( kstp ) ! advective (and/or diffusive) bottom boundary layer scheme
	265	IF( ln_tradmp ) CALL tra_dmp ( kstp ) ! internal damping trends
	266	IF( lk_bdy ) CALL bdy_tra_dmp ( kstp ) ! bdy damping trends
[392]	267	#if defined key_agrif
[5948]	268	IF(.NOT. Agrif_Root()) &
	269	& CALL Agrif_Sponge_tra ! tracers sponge
[389]	270	#endif
[5948]	271	CALL tra_adv ( kstp ) ! horizontal & vertical advection
	272	CALL tra_ldf ( kstp ) ! lateral mixing
[1239]	273
[5948]	274	!!gm : why CALL to dia_ptr has been moved here??? (use trends info?)
	275	IF( ln_diaptr ) CALL dia_ptr ! Poleward adv/ldf TRansports diagnostics
	276	!!gm
	277	CALL tra_zdf ( kstp ) ! vertical mixing and after tracer fields
	278	IF( ln_zdfnpc ) CALL tra_npc ( kstp ) ! update after fields by non-penetrative convection
[1481]	279
[3]	280	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5948]	281	! Set boundary conditions and Swap
[3]	282	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5948]	283	!!jc1: For agrif, it would be much better to finalize tracers/momentum here (e.g. bdy conditions) and move the swap
	284	!! (and time filtering) after Agrif update. Then restart would be done after and would contain updated fields.
	285	!! If so:
	286	!! (i) no need to call agrif update at initialization time
	287	!! (ii) no need to update "before" fields
	288	!!
	289	!! Apart from creating new tra_swp/dyn_swp routines, this however:
	290	!! (i) makes boundary conditions at initialization time computed from updated fields which is not the case between
	291	!! two restarts => restartability issue. One can circumvent this, maybe, by assuming "interface separation",
	292	!! e.g. a shift of the feedback interface inside child domain.
	293	!! (ii) requires that all restart outputs of updated variables by agrif (e.g. passive tracers/tke/barotropic arrays) are done at the same
	294	!! place.
	295	!!
	296	!!jc2: dynnxt must be the latest call. fse3t_b are indeed updated in that routine
	297	CALL tra_nxt ( kstp ) ! finalize (bcs) tracer fields at next time step and swap
	298	CALL dyn_nxt ( kstp ) ! finalize (bcs) velocities at next time step and swap
	299	CALL ssh_swp ( kstp ) ! swap of sea surface height
	300	IF( lk_vvl ) CALL dom_vvl_sf_swp( kstp ) ! swap of vertical scale factors
	301	!
[4292]	302
[5948]	303	!!gm : This does not only concern the dynamics ==>>> add a new title
	304	!!gm2: why ouput restart before AGRIF update?
	305	!!
	306	!!jc: That would be better, but see comment above
	307	!!
	308	IF( lrst_oce ) CALL rst_write ( kstp ) ! write output ocean restart file
[3]	309
[392]	310	#if defined key_agrif
[5948]	311	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	312	! AGRIF
	313	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	314	CALL Agrif_Integrate_ChildGrids( stp )
	315
	316	IF ( Agrif_NbStepint().EQ.0 ) THEN ! AGRIF Update
	317	!!jc in fact update i useless at last time step, but do it for global diagnostics
	318	CALL Agrif_Update_Tra() ! Update active tracers
	319	CALL Agrif_Update_Dyn() ! Update momentum
	320	ENDIF
[389]	321	#endif
[5948]	322	IF( ln_diahsb ) CALL dia_hsb ( kstp ) ! - ML - global conservation diagnostics
	323	IF( lk_diaobs ) CALL dia_obs ( kstp ) ! obs-minus-model (assimilation) diagnostics (call after dynamics update)
[3]	324
	325	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5948]	326	! Control
[3]	327	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5948]	328	CALL stp_ctl ( kstp, indic )
	329	IF( indic < 0 ) THEN
	330	CALL ctl_stop( 'step: indic < 0' )
	331	CALL dia_wri_state( 'output.abort', kstp )
[1482]	332	ENDIF
[5948]	333	IF( kstp == nit000 ) THEN
[4624]	334	CALL iom_close( numror ) ! close input ocean restart file
	335	IF(lwm) CALL FLUSH ( numond ) ! flush output namelist oce
[5948]	336	IF(lwm.AND.numoni /= -1 ) &
	337	& CALL FLUSH ( numoni ) ! flush output namelist ice (if exist)
[4147]	338	ENDIF
[3]	339
[508]	340	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[75]	341	! Coupled mode
	342	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5948]	343	!!gm why lk_oasis and not lk_cpl ????
	344	IF( lk_oasis ) CALL sbc_cpl_snd( kstp ) ! coupled mode : field exchanges
[508]	345	!
[4153]	346	#if defined key_iomput
	347	IF( kstp == nitend .OR. indic < 0 ) THEN
[5832]	348	CALL iom_context_finalize( cxios_context ) ! needed for XIOS+AGRIF
	349	IF( ln_crs ) CALL iom_context_finalize( trim(cxios_context)//"_crs" ) !
[4152]	350	ENDIF
[4153]	351	#endif
[3769]	352	!
[3294]	353	IF( nn_timing == 1 .AND. kstp == nit000 ) CALL timing_reset
[1481]	354	!
[3]	355	END SUBROUTINE stp
	356
	357	!!======================================================================
	358	END MODULE step

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