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step.F90 in branches/UKMO/dev_r5518_GO6_package_asm_surf_bgc/NEMOGCM/NEMO/OPA_SRC – NEMO

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source: branches/UKMO/dev_r5518_GO6_package_asm_surf_bgc/NEMOGCM/NEMO/OPA_SRC/step.F90 @ 8428

Last change on this file since 8428 was 8428, checked in by dford, 7 years ago
Add logchl assimilation, with nitrogen balancing for HadOCC.
File size: 24.8 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
[4990]	26	!! ! 2012-07 (J. Simeon, G. Madec, C. Ethe) Online coarsening of outputs
	27	!! 3.7 ! 2014-04 (F. Roquet, G. Madec) New equations of state
[3]	28	!!----------------------------------------------------------------------
[888]	29
	30	!!----------------------------------------------------------------------
[2528]	31	!! stp : OPA system time-stepping
[3]	32	!!----------------------------------------------------------------------
[3764]	33	USE step_oce ! time stepping definition modules
[4990]	34	USE iom
[6755]	35	USE lbclnk
[389]	36
[3]	37	IMPLICIT NONE
	38	PRIVATE
	39
[2528]	40	PUBLIC stp ! called by opa.F90
[3]	41
	42	!! * Substitutions
	43	# include "domzgr_substitute.h90"
[4990]	44	!!gm # include "zdfddm_substitute.h90"
[3]	45	!!----------------------------------------------------------------------
[4990]	46	!! NEMO/OPA 3.7 , NEMO Consortium (2014)
[888]	47	!! $Id$
[2528]	48	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
[3]	49	!!----------------------------------------------------------------------
	50	CONTAINS
	51
[508]	52	#if defined key_agrif
[6487]	53	RECURSIVE SUBROUTINE stp( )
[1438]	54	INTEGER :: kstp ! ocean time-step index
[508]	55	#else
[467]	56	SUBROUTINE stp( kstp )
[1438]	57	INTEGER, INTENT(in) :: kstp ! ocean time-step index
[467]	58	#endif
	59	!!----------------------------------------------------------------------
[3]	60	!! * ROUTINE stp *
[3764]	61	!!
[3]	62	!! ** Purpose : - Time stepping of OPA (momentum and active tracer eqs.)
	63	!! - Time stepping of LIM (dynamic and thermodynamic eqs.)
	64	!! - Tme stepping of TRC (passive tracer eqs.)
[3764]	65	!!
	66	!! ** Method : -1- Update forcings and data
	67	!! -2- Update ocean physics
	68	!! -3- Compute the t and s trends
	69	!! -4- Update t and s
[3]	70	!! -5- Compute the momentum trends
	71	!! -6- Update the horizontal velocity
	72	!! -7- Compute the diagnostics variables (rd,N2, div,cur,w)
	73	!! -8- Outputs and diagnostics
	74	!!----------------------------------------------------------------------
[888]	75	INTEGER :: jk ! dummy loop indice
[6755]	76	INTEGER :: tind ! tracer loop index
[3]	77	INTEGER :: indic ! error indicator if < 0
[4338]	78	INTEGER :: kcall ! optional integer argument (dom_vvl_sf_nxt)
[3]	79	!! ---------------------------------------------------------------------
	80
[392]	81	#if defined key_agrif
[389]	82	kstp = nit000 + Agrif_Nb_Step()
[6487]	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
[4491]	88	IF ( kstp == (nit000 + 1) ) lk_agrif_fstep = .FALSE.
[6487]	89
[1793]	90	# if defined key_iomput
[5407]	91	IF( Agrif_Nbstepint() == 0 ) CALL iom_swap( cxios_context )
[3764]	92	# endif
	93	#endif
[4152]	94	indic = 0 ! reset to no error condition
	95	IF( kstp == nit000 ) THEN
[5407]	96	! must be done after nemo_init for AGRIF+XIOS+OASIS
	97	CALL iom_init( cxios_context ) ! iom_put initialization
	98	IF( ln_crs ) CALL iom_init( TRIM(cxios_context)//"_crs" ) ! initialize context for coarse grid
[4152]	99	ENDIF
[4147]	100
[1725]	101	IF( kstp /= nit000 ) CALL day( kstp ) ! Calendar (day was already called at nit000 in day_init)
[5407]	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
[8400]	105	IF( ln_bias ) CALL bias_opn( kstp )
	106
[3]	107	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[888]	108	! Update data, open boundaries, surface boundary condition (including sea-ice)
[3]	109	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[3294]	110	IF( lk_tide ) CALL sbc_tide( kstp )
[5501]	111	IF( lk_bdy ) THEN
[5510]	112	IF( ln_apr_dyn) CALL sbc_apr( kstp ) ! bdy_dta needs ssh_ib
[5501]	113	CALL bdy_dta ( kstp, time_offset=+1 ) ! update dynamic & tracer data at open boundaries
	114	ENDIF
[6755]	115
	116	! We must ensure that tsb halos are up to date on EVERY timestep.
	117	DO tind = 1, jpts
	118	CALL lbc_lnk( tsb(:,:,:,tind), 'T', 1. )
	119	END DO
	120
[4292]	121	CALL sbc ( kstp ) ! Sea Boundary Condition (including sea-ice)
	122	! clem: moved here for bdy ice purpose
[3]	123	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5329]	124	! Update stochastic parameters and random T/S fluctuations
	125	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[6487]	126	IF( ln_sto_eos ) CALL sto_par( kstp ) ! Stochastic parameters
	127	IF( ln_sto_eos ) CALL sto_pts( tsn ) ! Random T/S fluctuations
[5329]	128
	129	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[3294]	130	! Ocean physics update (ua, va, tsa used as workspace)
[3]	131	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[4990]	132	! THERMODYNAMICS
	133	CALL eos_rab( tsb, rab_b ) ! before local thermal/haline expension ratio at T-points
	134	CALL eos_rab( tsn, rab_n ) ! now local thermal/haline expension ratio at T-points
	135	CALL bn2 ( tsb, rab_b, rn2b ) ! before Brunt-Vaisala frequency
	136	CALL bn2 ( tsn, rab_n, rn2 ) ! now Brunt-Vaisala frequency
[1492]	137	!
[3764]	138	! VERTICAL PHYSICS
[4369]	139	CALL zdf_bfr( kstp ) ! bottom friction (if quadratic)
[1492]	140	! ! Vertical eddy viscosity and diffusivity coefficients
[2528]	141	IF( lk_zdfric ) CALL zdf_ric( kstp ) ! Richardson number dependent Kz
	142	IF( lk_zdftke ) CALL zdf_tke( kstp ) ! TKE closure scheme for Kz
	143	IF( lk_zdfgls ) CALL zdf_gls( kstp ) ! GLS closure scheme for Kz
	144	IF( lk_zdfkpp ) CALL zdf_kpp( kstp ) ! KPP closure scheme for Kz
[4292]	145	IF( lk_zdfcst ) THEN ! Constant Kz (reset avt, avm[uv] to the background value)
[5120]	146	avt (:,:,:) = rn_avt0 * wmask (:,:,:)
	147	avmu(:,:,:) = rn_avm0 * wumask(:,:,:)
	148	avmv(:,:,:) = rn_avm0 * wvmask(:,:,:)
[677]	149	ENDIF
[1492]	150	IF( ln_rnf_mouth ) THEN ! increase diffusivity at rivers mouths
[1246]	151	DO jk = 2, nkrnf ; avt(:,:,jk) = avt(:,:,jk) + 2.e0 * rn_avt_rnf * rnfmsk(:,:) * tmask(:,:,jk) ; END DO
[3]	152	ENDIF
[1492]	153	IF( ln_zdfevd ) CALL zdf_evd( kstp ) ! enhanced vertical eddy diffusivity
[3]	154
[1492]	155	IF( lk_zdftmx ) CALL zdf_tmx( kstp ) ! tidal vertical mixing
[3]	156
[888]	157	IF( lk_zdfddm .AND. .NOT. lk_zdfkpp ) &
[1492]	158	& CALL zdf_ddm( kstp ) ! double diffusive mixing
[3764]	159
[1492]	160	CALL zdf_mxl( kstp ) ! mixed layer depth
[3]	161
[2528]	162	! write TKE or GLS information in the restart file
[1531]	163	IF( lrst_oce .AND. lk_zdftke ) CALL tke_rst( kstp, 'WRITE' )
[2528]	164	IF( lrst_oce .AND. lk_zdfgls ) CALL gls_rst( kstp, 'WRITE' )
[1492]	165	!
[3764]	166	! LATERAL PHYSICS
[1492]	167	!
	168	IF( lk_ldfslp ) THEN ! slope of lateral mixing
[5120]	169	CALL eos( tsb, rhd, gdept_0(:,:,:) ) ! before in situ density
	170	IF( ln_zps .AND. .NOT. ln_isfcav) &
	171	& CALL zps_hde ( kstp, jpts, tsb, gtsu, gtsv, & ! Partial steps: before horizontal gradient
	172	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
	173	IF( ln_zps .AND. ln_isfcav) &
	174	& CALL zps_hde_isf( kstp, jpts, tsb, gtsu, gtsv, & ! Partial steps for top cell (ISF)
	175	& rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , &
	176	& gtui, gtvi, grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi ) ! of t, s, rd at the first ocean level
[2528]	177	IF( ln_traldf_grif ) THEN ! before slope for Griffies operator
	178	CALL ldf_slp_grif( kstp )
	179	ELSE
	180	CALL ldf_slp( kstp, rhd, rn2b ) ! before slope for Madec operator
	181	ENDIF
[1481]	182	ENDIF
[3]	183	#if defined key_traldf_c2d
[1492]	184	IF( lk_traldf_eiv ) CALL ldf_eiv( kstp ) ! eddy induced velocity coefficient
[2528]	185	#endif
[5407]	186	#if defined key_traldf_c3d && defined key_traldf_smag
[3634]	187	CALL ldf_tra_smag( kstp ) ! eddy induced velocity coefficient
	188	# endif
[5407]	189	#if defined key_dynldf_c3d && defined key_dynldf_smag
[3634]	190	CALL ldf_dyn_smag( kstp ) ! eddy induced velocity coefficient
	191	# endif
[3]	192
[4369]	193	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	194	! Ocean dynamics : hdiv, rot, ssh, e3, wn
	195	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	196	CALL ssh_nxt ( kstp ) ! after ssh (includes call to div_cur)
[4387]	197	IF( lk_vvl ) CALL dom_vvl_sf_nxt( kstp ) ! after vertical scale factors
	198	CALL wzv ( kstp ) ! now cross-level velocity
[3634]	199
[4387]	200	IF( lk_dynspg_ts ) THEN
[4369]	201	! In case the time splitting case, update almost all momentum trends here:
	202	! Note that the computation of vertical velocity above, hence "after" sea level
	203	! is necessary to compute momentum advection for the rhs of barotropic loop:
[4990]	204	CALL eos ( tsn, rhd, rhop, fsdept_n(:,:,:) ) ! now in situ density for hpg computation
[5120]	205	IF( ln_zps .AND. .NOT. ln_isfcav) &
	206	& CALL zps_hde ( kstp, jpts, tsn, gtsu, gtsv, & ! Partial steps: before horizontal gradient
	207	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
	208	IF( ln_zps .AND. ln_isfcav) &
	209	& CALL zps_hde_isf( kstp, jpts, tsn, gtsu, gtsv, & ! Partial steps for top cell (ISF)
	210	& rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , &
	211	& gtui, gtvi, grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi ) ! of t, s, rd at the last ocean level
[4369]	212
	213	ua(:,:,:) = 0.e0 ! set dynamics trends to zero
	214	va(:,:,:) = 0.e0
[6487]	215	IF( lk_asminc .AND. ln_asmiau .AND. &
[4369]	216	& ln_dyninc ) CALL dyn_asm_inc ( kstp ) ! apply dynamics assimilation increment
	217	IF( ln_neptsimp ) CALL dyn_nept_cor ( kstp ) ! subtract Neptune velocities (simplified)
	218	IF( lk_bdy ) CALL bdy_dyn3d_dmp( kstp ) ! bdy damping trends
	219	CALL dyn_adv ( kstp ) ! advection (vector or flux form)
	220	CALL dyn_vor ( kstp ) ! vorticity term including Coriolis
	221	CALL dyn_ldf ( kstp ) ! lateral mixing
	222	IF( ln_neptsimp ) CALL dyn_nept_cor ( kstp ) ! add Neptune velocities (simplified)
	223	#if defined key_agrif
	224	IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_dyn ! momentum sponge
	225	#endif
	226	CALL dyn_hpg( kstp ) ! horizontal gradient of Hydrostatic pressure
	227	CALL dyn_spg( kstp, indic ) ! surface pressure gradient
	228
	229	ua_sv(:,:,:) = ua(:,:,:) ! Save trends (barotropic trend has been fully updated at this stage)
	230	va_sv(:,:,:) = va(:,:,:)
	231
	232	CALL div_cur( kstp ) ! Horizontal divergence & Relative vorticity (2nd call in time-split case)
[4387]	233	IF( lk_vvl ) CALL dom_vvl_sf_nxt( kstp, kcall=2 ) ! after vertical scale factors (update depth average component)
	234	CALL wzv ( kstp ) ! now cross-level velocity
[4369]	235	ENDIF
	236
[1482]	237	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[3294]	238	! diagnostics and outputs (ua, va, tsa used as workspace)
[1482]	239	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5147]	240	IF( lk_floats ) CALL flo_stp( kstp ) ! drifting Floats
	241	IF( lk_diahth ) CALL dia_hth( kstp ) ! Thermocline depth (20 degres isotherm depth)
[5407]	242	IF( .NOT. ln_cpl ) CALL dia_fwb( kstp ) ! Fresh water budget diagnostics
[5147]	243	IF( lk_diadct ) CALL dia_dct( kstp ) ! Transports
	244	IF( lk_diaar5 ) CALL dia_ar5( kstp ) ! ar5 diag
	245	IF( lk_diaharm ) CALL dia_harm( kstp ) ! Tidal harmonic analysis
[6491]	246	CALL dia_prod( kstp ) ! ocean model: product diagnostics
[5147]	247	CALL dia_wri( kstp ) ! ocean model: outputs
[4152]	248	!
[5147]	249	IF( ln_crs ) CALL crs_fld( kstp ) ! ocean model: online field coarsening & output
[1482]	250
[923]	251	#if defined key_top
[3]	252	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	253	! Passive Tracer Model
	254	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[8428]	255	IF( lk_asminc .AND. ln_asmiau .AND. ln_logchlinc ) &
	256	& CALL logchl_asm_inc( kstp ) ! logchl assimilation
[1492]	257	CALL trc_stp( kstp ) ! time-stepping
[3]	258	#endif
	259
[4990]	260
[3]	261	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[1492]	262	! Active tracers (ua, va used as workspace)
[3]	263	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[2528]	264	tsa(:,:,:,:) = 0.e0 ! set tracer trends to zero
[3]	265
[6487]	266	IF( lk_asminc .AND. ln_asmiau .AND. &
[2528]	267	& ln_trainc ) CALL tra_asm_inc( kstp ) ! apply tracer assimilation increment
[467]	268	CALL tra_sbc ( kstp ) ! surface boundary condition
	269	IF( ln_traqsr ) CALL tra_qsr ( kstp ) ! penetrative solar radiation qsr
[2528]	270	IF( ln_trabbc ) CALL tra_bbc ( kstp ) ! bottom heat flux
	271	IF( lk_trabbl ) CALL tra_bbl ( kstp ) ! advective (and/or diffusive) bottom boundary layer scheme
[3294]	272	IF( ln_tradmp ) CALL tra_dmp ( kstp ) ! internal damping trends
[8400]	273	IF( ln_bias ) CALL tra_bias ( kstp )
[3651]	274	IF( lk_bdy ) CALL bdy_tra_dmp( kstp ) ! bdy damping trends
[467]	275	CALL tra_adv ( kstp ) ! horizontal & vertical advection
[2528]	276	IF( lk_zdfkpp ) CALL tra_kpp ( kstp ) ! KPP non-local tracer fluxes
[467]	277	CALL tra_ldf ( kstp ) ! lateral mixing
[5147]	278
	279	IF( ln_diaptr ) CALL dia_ptr ! Poleward adv/ldf TRansports diagnostics
	280
[392]	281	#if defined key_agrif
[782]	282	IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_tra ! tracers sponge
[389]	283	#endif
[1111]	284	CALL tra_zdf ( kstp ) ! vertical mixing and after tracer fields
[1239]	285
[1492]	286	IF( ln_dynhpg_imp ) THEN ! semi-implicit hpg (time stepping then eos)
[2528]	287	IF( ln_zdfnpc ) CALL tra_npc( kstp ) ! update after fields by non-penetrative convection
	288	CALL tra_nxt( kstp ) ! tracer fields at next time step
[4292]	289	CALL eos ( tsa, rhd, rhop, fsdept_n(:,:,:) ) ! Time-filtered in situ density for hpg computation
[5120]	290	IF( ln_zps .AND. .NOT. ln_isfcav) &
	291	& CALL zps_hde ( kstp, jpts, tsa, gtsu, gtsv, & ! Partial steps: before horizontal gradient
	292	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
	293	IF( ln_zps .AND. ln_isfcav) &
	294	& CALL zps_hde_isf( kstp, jpts, tsa, gtsu, gtsv, & ! Partial steps for top cell (ISF)
	295	& rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , &
	296	& gtui, gtvi, grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi ) ! of t, s, rd at the last ocean level
[8400]	297	IF( ln_bias ) CALL dyn_bias( kstp )
[4215]	298	ELSE ! centered hpg (eos then time stepping)
[4292]	299	IF ( .NOT. lk_dynspg_ts ) THEN ! eos already called in time-split case
[4990]	300	CALL eos ( tsn, rhd, rhop, fsdept_n(:,:,:) ) ! now in situ density for hpg computation
[5120]	301	IF( ln_zps .AND. .NOT. ln_isfcav) &
	302	& CALL zps_hde ( kstp, jpts, tsn, gtsu, gtsv, & ! Partial steps: before horizontal gradient
	303	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
	304	IF( ln_zps .AND. ln_isfcav) &
	305	& CALL zps_hde_isf( kstp, jpts, tsn, gtsu, gtsv, & ! Partial steps for top cell (ISF)
	306	& rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , &
	307	& gtui, gtvi, grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi ) ! of t, s, rd at the last ocean level
[4292]	308	ENDIF
[2528]	309	IF( ln_zdfnpc ) CALL tra_npc( kstp ) ! update after fields by non-penetrative convection
	310	CALL tra_nxt( kstp ) ! tracer fields at next time step
[8400]	311	IF( ln_bias ) CALL dyn_bias( kstp )
[3764]	312	ENDIF
[1481]	313
[3]	314	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[3294]	315	! Dynamics (tsa used as workspace)
[3]	316	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[4292]	317	IF( lk_dynspg_ts ) THEN
	318	! revert to previously computed momentum tendencies
	319	! (not using ua, va as temporary arrays during tracers' update could avoid that)
	320	ua(:,:,:) = ua_sv(:,:,:)
	321	va(:,:,:) = va_sv(:,:,:)
	322	! Revert now divergence and rotational to previously computed ones
	323	!(needed because of the time swap in div_cur, at the beginning of each time step)
	324	hdivn(:,:,:) = hdivb(:,:,:)
	325	rotn(:,:,:) = rotb(:,:,:)
	326
	327	CALL dyn_bfr( kstp ) ! bottom friction
	328	CALL dyn_zdf( kstp ) ! vertical diffusion
	329	ELSE
[1492]	330	ua(:,:,:) = 0.e0 ! set dynamics trends to zero
[75]	331	va(:,:,:) = 0.e0
[3]	332
[6487]	333	IF( lk_asminc .AND. ln_asmiau .AND. &
[4292]	334	& ln_dyninc ) CALL dyn_asm_inc( kstp ) ! apply dynamics assimilation increment
	335	IF( ln_bkgwri ) CALL asm_bkg_wri( kstp ) ! output background fields
	336	IF( ln_neptsimp ) CALL dyn_nept_cor( kstp ) ! subtract Neptune velocities (simplified)
	337	IF( lk_bdy ) CALL bdy_dyn3d_dmp(kstp ) ! bdy damping trends
[1492]	338	CALL dyn_adv( kstp ) ! advection (vector or flux form)
	339	CALL dyn_vor( kstp ) ! vorticity term including Coriolis
	340	CALL dyn_ldf( kstp ) ! lateral mixing
[4292]	341	IF( ln_neptsimp ) CALL dyn_nept_cor( kstp ) ! add Neptune velocities (simplified)
[392]	342	#if defined key_agrif
[4292]	343	IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_dyn ! momemtum sponge
[389]	344	#endif
[1492]	345	CALL dyn_hpg( kstp ) ! horizontal gradient of Hydrostatic pressure
[3764]	346	CALL dyn_bfr( kstp ) ! bottom friction
[1492]	347	CALL dyn_zdf( kstp ) ! vertical diffusion
	348	CALL dyn_spg( kstp, indic ) ! surface pressure gradient
[4292]	349	ENDIF
[1492]	350	CALL dyn_nxt( kstp ) ! lateral velocity at next time step
[3]	351
[4292]	352	CALL ssh_swp( kstp ) ! swap of sea surface height
	353	IF( lk_vvl ) CALL dom_vvl_sf_swp( kstp ) ! swap of vertical scale factors
[6487]	354	!
	355	IF( lrst_oce ) CALL rst_write( kstp ) ! write output ocean restart file
[6498]	356	IF( ln_sto_eos ) CALL sto_rst_write( kstp ) ! write restart file for stochastic parameters
[593]	357
[6487]	358	#if defined key_agrif
	359	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	360	! AGRIF
	361	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	362	CALL Agrif_Integrate_ChildGrids( stp )
	363
	364	IF ( Agrif_NbStepint().EQ.0 ) THEN
	365	CALL Agrif_Update_Tra() ! Update active tracers
	366	CALL Agrif_Update_Dyn() ! Update momentum
	367	ENDIF
	368	#endif
[2528]	369	IF( ln_diahsb ) CALL dia_hsb( kstp ) ! - ML - global conservation diagnostics
	370	IF( lk_diaobs ) CALL dia_obs( kstp ) ! obs-minus-model (assimilation) diagnostics (call after dynamics update)
	371
[3]	372	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[6487]	373	! Control
[3]	374	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[1492]	375	CALL stp_ctl( kstp, indic )
	376	IF( indic < 0 ) THEN
	377	CALL ctl_stop( 'step: indic < 0' )
	378	CALL dia_wri_state( 'output.abort', kstp )
[1482]	379	ENDIF
[4147]	380	IF( kstp == nit000 ) THEN
[4624]	381	CALL iom_close( numror ) ! close input ocean restart file
	382	IF(lwm) CALL FLUSH ( numond ) ! flush output namelist oce
[5147]	383	IF( lwm.AND.numoni /= -1 ) CALL FLUSH ( numoni ) ! flush output namelist ice
[4147]	384	ENDIF
[3]	385
[8400]	386
	387	IF( lrst_bias ) CALL bias_wrt ( kstp )
	388
[508]	389	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[75]	390	! Coupled mode
	391	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[8280]	392	!IF( lk_oasis ) CALL sbc_cpl_snd( kstp ) ! coupled mode : field exchanges
[508]	393	!
[4153]	394	#if defined key_iomput
	395	IF( kstp == nitend .OR. indic < 0 ) THEN
[5407]	396	CALL iom_context_finalize( cxios_context ) ! needed for XIOS+AGRIF
	397	IF( ln_crs ) CALL iom_context_finalize( trim(cxios_context)//"_crs" ) !
[4152]	398	ENDIF
[4153]	399	#endif
[3769]	400	!
[3294]	401	IF( nn_timing == 1 .AND. kstp == nit000 ) CALL timing_reset
[6487]	402	!
[1481]	403	!
[3]	404	END SUBROUTINE stp
	405
	406	!!======================================================================
	407	END MODULE step

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