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step.F90 in branches/2015/dev_r5721_CNRS9_NOC3_LDF/NEMOGCM/NEMO/OPA_SRC – NEMO

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source: branches/2015/dev_r5721_CNRS9_NOC3_LDF/NEMOGCM/NEMO/OPA_SRC/step.F90 @ 5760

Last change on this file since 5760 was 5758, checked in by gm, 9 years ago
#1593: LDF-ADV, step II.1: phasing the improvements/simplifications of diffusive trend (see wiki)
Property svn:keywords set to `Id`
File size: 25.1 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
[5758]	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
[3]	30	!!----------------------------------------------------------------------
[888]	31
	32	!!----------------------------------------------------------------------
[2528]	33	!! stp : OPA system time-stepping
[3]	34	!!----------------------------------------------------------------------
[3764]	35	USE step_oce ! time stepping definition modules
[4990]	36	USE iom
[389]	37
[3]	38	IMPLICIT NONE
	39	PRIVATE
	40
[5758]	41	PUBLIC stp ! called by nemogcm.F90
[3]	42
	43	!! * Substitutions
	44	# include "domzgr_substitute.h90"
[4990]	45	!!gm # include "zdfddm_substitute.h90"
[3]	46	!!----------------------------------------------------------------------
[5758]	47	!! NEMO/OPA 3.7 , NEMO Consortium (2015)
[888]	48	!! $Id$
[2528]	49	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
[3]	50	!!----------------------------------------------------------------------
	51	CONTAINS
	52
[508]	53	#if defined key_agrif
[5656]	54	RECURSIVE SUBROUTINE stp( )
[1438]	55	INTEGER :: kstp ! ocean time-step index
[508]	56	#else
[467]	57	SUBROUTINE stp( kstp )
[1438]	58	INTEGER, INTENT(in) :: kstp ! ocean time-step index
[467]	59	#endif
	60	!!----------------------------------------------------------------------
[3]	61	!! * ROUTINE stp *
[3764]	62	!!
[3]	63	!! ** Purpose : - Time stepping of OPA (momentum and active tracer eqs.)
	64	!! - Time stepping of LIM (dynamic and thermodynamic eqs.)
	65	!! - Tme stepping of TRC (passive tracer eqs.)
[3764]	66	!!
	67	!! ** Method : -1- Update forcings and data
	68	!! -2- Update ocean physics
	69	!! -3- Compute the t and s trends
	70	!! -4- Update t and s
[3]	71	!! -5- Compute the momentum trends
	72	!! -6- Update the horizontal velocity
	73	!! -7- Compute the diagnostics variables (rd,N2, div,cur,w)
	74	!! -8- Outputs and diagnostics
	75	!!----------------------------------------------------------------------
[888]	76	INTEGER :: jk ! dummy loop indice
[3]	77	INTEGER :: indic ! error indicator if < 0
[4338]	78	INTEGER :: kcall ! optional integer argument (dom_vvl_sf_nxt)
[3]	79	!! ---------------------------------------------------------------------
[392]	80	#if defined key_agrif
[389]	81	kstp = nit000 + Agrif_Nb_Step()
[5758]	82	IF( lk_agrif_debug ) THEN
	83	IF( Agrif_Root() .and. lwp) WRITE(,) '---'
	84	IF(lwp) WRITE(,) 'Grid Number', Agrif_Fixed(),' time step ', kstp, 'int tstep', Agrif_NbStepint()
[5656]	85	ENDIF
[5758]	86	IF( kstp == nit000 + 1 ) lk_agrif_fstep = .FALSE.
[1793]	87	# if defined key_iomput
[5407]	88	IF( Agrif_Nbstepint() == 0 ) CALL iom_swap( cxios_context )
[3764]	89	# endif
	90	#endif
[5758]	91	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	92	! update I/O and calendar
	93	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	94	indic = 0 ! reset to no error condition
	95
	96	IF( kstp == nit000 ) THEN ! initialize IOM context (must be done after nemo_init for AGRIF+XIOS+OASIS)
	97	CALL iom_init( cxios_context ) ! for model grid (including passible AGRIF zoom)
	98	IF( ln_crs ) CALL iom_init( TRIM(cxios_context)//"_crs" ) ! for coarse grid
[4152]	99	ENDIF
[1725]	100	IF( kstp /= nit000 ) CALL day( kstp ) ! Calendar (day was already called at nit000 in day_init)
[5758]	101	CALL iom_setkt( kstp - nit000 + 1, cxios_context ) ! tell IOM we are at time step kstp
	102	IF( ln_crs ) CALL iom_setkt( kstp - nit000 + 1, TRIM(cxios_context)//"_crs" ) ! tell IOM we are at time step kstp
[3]	103
	104	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5758]	105	! Update external forcing (tides, open boundaries, and surface boundary condition (including sea-ice)
[3]	106	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5758]	107	IF( lk_tide ) CALL sbc_tide( kstp ) ! update tide potential
	108	IF( ln_apr_dyn ) CALL sbc_apr ( kstp ) ! atmospheric pressure (NB: call before bdy_dta which needs ssh_ib)
	109	IF( lk_bdy ) CALL bdy_dta ( kstp, time_offset=+1 ) ! update dynamic & tracer data at open boundaries
	110	CALL sbc ( kstp ) ! Sea Boundary Condition (including sea-ice)
	111	CALL FLUSH ( numout )
[3]	112	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5329]	113	! Update stochastic parameters and random T/S fluctuations
	114	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5758]	115	CALL sto_par( kstp ) ! Stochastic parameters
	116	CALL FLUSH ( numout )
[5329]	117
	118	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[3294]	119	! Ocean physics update (ua, va, tsa used as workspace)
[3]	120	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[4990]	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
[5758]	126	CALL FLUSH ( numout )
[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)
[5120]	135	avt (:,:,:) = rn_avt0 * wmask (:,:,:)
	136	avmu(:,:,:) = rn_avm0 * wumask(:,:,:)
	137	avmv(:,:,:) = rn_avm0 * wvmask(:,:,:)
[677]	138	ENDIF
[5758]	139	CALL FLUSH ( numout )
[1492]	140	IF( ln_rnf_mouth ) THEN ! increase diffusivity at rivers mouths
[5758]	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
[5758]	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' )
[5758]	154	CALL FLUSH ( numout )
[1492]	155	!
[3764]	156	! LATERAL PHYSICS
[1492]	157	!
[5758]	158	IF( l_ldfslp ) THEN ! slope of lateral mixing
	159	!!gm : why this here ????
[5329]	160	IF(ln_sto_eos ) CALL sto_pts( tsn ) ! Random T/S fluctuations
[5758]	161	!!gm
[5120]	162	CALL eos( tsb, rhd, gdept_0(:,:,:) ) ! before in situ density
[5758]	163
[5120]	164	IF( ln_zps .AND. .NOT. ln_isfcav) &
	165	& CALL zps_hde ( kstp, jpts, tsb, gtsu, gtsv, & ! Partial steps: before horizontal gradient
	166	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
[5758]	167
[5120]	168	IF( ln_zps .AND. ln_isfcav) &
[5758]	169	& CALL zps_hde_isf( kstp, jpts, tsb, gtsu, gtsv, gtui, gtvi, & ! Partial steps for top cell (ISF)
[5120]	170	& rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , &
[5758]	171	& grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi ) ! of t, s, rd at the first ocean level
	172
	173	IF( ln_traldf_triad ) THEN
	174	CALL ldf_slp_triad( kstp ) ! before slope for triad operator
	175	ELSE
	176	CALL ldf_slp ( kstp, rhd, rn2b ) ! before slope for standard operator
[2528]	177	ENDIF
[1481]	178	ENDIF
[5758]	179	! ! eddy diffusivity coeff. and/or eiv coeff.
	180	IF( l_ldftra_time .OR. l_ldfeiv_time ) CALL ldf_tra( kstp )
	181	write(,) 'after ldf_slp'
	182	CALL FLUSH ( numout )
[3]	183
[4369]	184	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	185	! Ocean dynamics : hdiv, rot, ssh, e3, wn
	186	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	187	CALL ssh_nxt ( kstp ) ! after ssh (includes call to div_cur)
[4387]	188	IF( lk_vvl ) CALL dom_vvl_sf_nxt( kstp ) ! after vertical scale factors
	189	CALL wzv ( kstp ) ! now cross-level velocity
[5758]	190	write(,) 'after wzv'
	191	CALL FLUSH ( numout )
[3634]	192
[4387]	193	IF( lk_dynspg_ts ) THEN
[4369]	194	! In case the time splitting case, update almost all momentum trends here:
	195	! Note that the computation of vertical velocity above, hence "after" sea level
	196	! is necessary to compute momentum advection for the rhs of barotropic loop:
[5758]	197	!!gm : why also here ????
[5329]	198	IF(ln_sto_eos ) CALL sto_pts( tsn ) ! Random T/S fluctuations
[5758]	199	!!gm
[4990]	200	CALL eos ( tsn, rhd, rhop, fsdept_n(:,:,:) ) ! now in situ density for hpg computation
[5758]	201
	202	IF( ln_zps .AND. .NOT. ln_isfcav) & ! Partial steps: bottom before horizontal gradient
	203	& CALL zps_hde ( kstp, jpts, tsn, gtsu, gtsv, & ! of t, s, rd at the last ocean level
	204	& rhd, gru , grv )
	205	IF( ln_zps .AND. ln_isfcav) & ! Partial steps: top & bottom before horizontal gradient
	206	& CALL zps_hde_isf( kstp, jpts, tsn, gtsu, gtsv, gtui, gtvi, &
[5120]	207	& rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , &
[5758]	208	& grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi )
[4369]	209
[5758]	210	ua(:,:,:) = 0._wp ! set dynamics trends to zero
	211	va(:,:,:) = 0._wp
[5656]	212	IF( lk_asminc .AND. ln_asmiau .AND. &
[4369]	213	& ln_dyninc ) CALL dyn_asm_inc ( kstp ) ! apply dynamics assimilation increment
	214	IF( ln_neptsimp ) CALL dyn_nept_cor ( kstp ) ! subtract Neptune velocities (simplified)
	215	IF( lk_bdy ) CALL bdy_dyn3d_dmp( kstp ) ! bdy damping trends
	216	CALL dyn_adv ( kstp ) ! advection (vector or flux form)
	217	CALL dyn_vor ( kstp ) ! vorticity term including Coriolis
	218	CALL dyn_ldf ( kstp ) ! lateral mixing
	219	IF( ln_neptsimp ) CALL dyn_nept_cor ( kstp ) ! add Neptune velocities (simplified)
	220	#if defined key_agrif
	221	IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_dyn ! momentum sponge
	222	#endif
	223	CALL dyn_hpg( kstp ) ! horizontal gradient of Hydrostatic pressure
	224	CALL dyn_spg( kstp, indic ) ! surface pressure gradient
	225
	226	ua_sv(:,:,:) = ua(:,:,:) ! Save trends (barotropic trend has been fully updated at this stage)
	227	va_sv(:,:,:) = va(:,:,:)
	228
	229	CALL div_cur( kstp ) ! Horizontal divergence & Relative vorticity (2nd call in time-split case)
[4387]	230	IF( lk_vvl ) CALL dom_vvl_sf_nxt( kstp, kcall=2 ) ! after vertical scale factors (update depth average component)
	231	CALL wzv ( kstp ) ! now cross-level velocity
[4369]	232	ENDIF
[5758]	233	write(,) 'after wzv 2'
	234	CALL FLUSH ( numout )
[4369]	235
[1482]	236	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[3294]	237	! diagnostics and outputs (ua, va, tsa used as workspace)
[1482]	238	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5758]	239	IF( lk_floats ) CALL flo_stp( kstp ) ! drifting Floats
	240	IF( lk_diahth ) CALL dia_hth( kstp ) ! Thermocline depth (20 degres isotherm depth)
	241	IF(.NOT.ln_cpl ) CALL dia_fwb( kstp ) ! Fresh water budget diagnostics
	242	IF( lk_diadct ) CALL dia_dct( kstp ) ! Transports
	243	IF( lk_diaar5 ) CALL dia_ar5( kstp ) ! ar5 diag
	244	IF( lk_diaharm ) CALL dia_harm( kstp ) ! Tidal harmonic analysis
	245	CALL dia_wri( kstp ) ! ocean model: outputs
[4152]	246	!
[5758]	247	IF( ln_crs ) CALL crs_fld( kstp ) ! ocean model: online field coarsening & output
[1482]	248
[923]	249	#if defined key_top
[3]	250	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	251	! Passive Tracer Model
	252	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[1492]	253	CALL trc_stp( kstp ) ! time-stepping
[3]	254	#endif
[5758]	255	write(,) 'end dyn '
	256	CALL FLUSH ( numout )
[3]	257
	258	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[1492]	259	! Active tracers (ua, va used as workspace)
[3]	260	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5758]	261	tsa(:,:,:,:) = 0._wp ! set tracer trends to zero
[3]	262
[5656]	263	IF( lk_asminc .AND. ln_asmiau .AND. &
[2528]	264	& ln_trainc ) CALL tra_asm_inc( kstp ) ! apply tracer assimilation increment
[467]	265	CALL tra_sbc ( kstp ) ! surface boundary condition
	266	IF( ln_traqsr ) CALL tra_qsr ( kstp ) ! penetrative solar radiation qsr
[2528]	267	IF( ln_trabbc ) CALL tra_bbc ( kstp ) ! bottom heat flux
	268	IF( lk_trabbl ) CALL tra_bbl ( kstp ) ! advective (and/or diffusive) bottom boundary layer scheme
[3294]	269	IF( ln_tradmp ) CALL tra_dmp ( kstp ) ! internal damping trends
[3651]	270	IF( lk_bdy ) CALL bdy_tra_dmp( kstp ) ! bdy damping trends
[467]	271	CALL tra_adv ( kstp ) ! horizontal & vertical advection
[5758]	272	write(,) 'before tra_ldf'
	273	CALL FLUSH ( numout )
[467]	274	CALL tra_ldf ( kstp ) ! lateral mixing
[5758]	275	write(,) 'after tra_ldf'
	276	CALL FLUSH ( numout )
[5147]	277
[5758]	278	!!gm : why CALL to dia_ptr has been moved here??? (use trends info?)
[5147]	279	IF( ln_diaptr ) CALL dia_ptr ! Poleward adv/ldf TRansports diagnostics
[5758]	280	!!gm
[5147]	281
[392]	282	#if defined key_agrif
[782]	283	IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_tra ! tracers sponge
[389]	284	#endif
[1111]	285	CALL tra_zdf ( kstp ) ! vertical mixing and after tracer fields
[1239]	286
[1492]	287	IF( ln_dynhpg_imp ) THEN ! semi-implicit hpg (time stepping then eos)
[2528]	288	IF( ln_zdfnpc ) CALL tra_npc( kstp ) ! update after fields by non-penetrative convection
	289	CALL tra_nxt( kstp ) ! tracer fields at next time step
[5758]	290	!!gm : why again a call to sto_pts ???
[5329]	291	IF( ln_sto_eos ) CALL sto_pts( tsn ) ! Random T/S fluctuations
[5758]	292	!!gm
[4292]	293	CALL eos ( tsa, rhd, rhop, fsdept_n(:,:,:) ) ! Time-filtered in situ density for hpg computation
[5120]	294	IF( ln_zps .AND. .NOT. ln_isfcav) &
	295	& CALL zps_hde ( kstp, jpts, tsa, gtsu, gtsv, & ! Partial steps: before horizontal gradient
	296	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
	297	IF( ln_zps .AND. ln_isfcav) &
[5758]	298	& CALL zps_hde_isf( kstp, jpts, tsa, gtsu, gtsv, gtui, gtvi, & ! Partial steps for top/bottom cells
[5120]	299	& rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , &
[5758]	300	& grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi )
[4215]	301	ELSE ! centered hpg (eos then time stepping)
[4292]	302	IF ( .NOT. lk_dynspg_ts ) THEN ! eos already called in time-split case
[5758]	303	!!gm : why again a call to sto_pts ???
[5329]	304	IF( ln_sto_eos ) CALL sto_pts( tsn ) ! Random T/S fluctuations
[5758]	305	!!gm
[4990]	306	CALL eos ( tsn, rhd, rhop, fsdept_n(:,:,:) ) ! now in situ density for hpg computation
[5120]	307	IF( ln_zps .AND. .NOT. ln_isfcav) &
[5758]	308	& CALL zps_hde ( kstp, jpts, tsn, gtsu, gtsv, & ! Partial steps: bottom before horizontal gradient
	309	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
[5120]	310	IF( ln_zps .AND. ln_isfcav) &
[5758]	311	& CALL zps_hde_isf( kstp, jpts, tsn, gtsu, gtsv, gtui, gtvi, & ! Partial steps for top/bottom cells
[5120]	312	& rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , &
[5758]	313	& grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi ) ! of t, s, rd at the last ocean level
[4292]	314	ENDIF
[2528]	315	IF( ln_zdfnpc ) CALL tra_npc( kstp ) ! update after fields by non-penetrative convection
	316	CALL tra_nxt( kstp ) ! tracer fields at next time step
[3764]	317	ENDIF
[5758]	318	write(,) 'after tra_nxt'
	319	CALL FLUSH ( numout )
[1481]	320
[3]	321	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[3294]	322	! Dynamics (tsa used as workspace)
[3]	323	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[4292]	324	IF( lk_dynspg_ts ) THEN
	325	! revert to previously computed momentum tendencies
	326	! (not using ua, va as temporary arrays during tracers' update could avoid that)
	327	ua(:,:,:) = ua_sv(:,:,:)
	328	va(:,:,:) = va_sv(:,:,:)
	329	! Revert now divergence and rotational to previously computed ones
	330	!(needed because of the time swap in div_cur, at the beginning of each time step)
	331	hdivn(:,:,:) = hdivb(:,:,:)
	332	rotn(:,:,:) = rotb(:,:,:)
	333
	334	CALL dyn_bfr( kstp ) ! bottom friction
	335	CALL dyn_zdf( kstp ) ! vertical diffusion
	336	ELSE
[5758]	337	ua(:,:,:) = 0._wp ! set dynamics trends to zero
	338	va(:,:,:) = 0._wp
[3]	339
[5656]	340	IF( lk_asminc .AND. ln_asmiau .AND. &
[4292]	341	& ln_dyninc ) CALL dyn_asm_inc( kstp ) ! apply dynamics assimilation increment
	342	IF( ln_bkgwri ) CALL asm_bkg_wri( kstp ) ! output background fields
	343	IF( ln_neptsimp ) CALL dyn_nept_cor( kstp ) ! subtract Neptune velocities (simplified)
	344	IF( lk_bdy ) CALL bdy_dyn3d_dmp(kstp ) ! bdy damping trends
[1492]	345	CALL dyn_adv( kstp ) ! advection (vector or flux form)
	346	CALL dyn_vor( kstp ) ! vorticity term including Coriolis
	347	CALL dyn_ldf( kstp ) ! lateral mixing
[4292]	348	IF( ln_neptsimp ) CALL dyn_nept_cor( kstp ) ! add Neptune velocities (simplified)
[392]	349	#if defined key_agrif
[4292]	350	IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_dyn ! momemtum sponge
[389]	351	#endif
[1492]	352	CALL dyn_hpg( kstp ) ! horizontal gradient of Hydrostatic pressure
[3764]	353	CALL dyn_bfr( kstp ) ! bottom friction
[1492]	354	CALL dyn_zdf( kstp ) ! vertical diffusion
	355	CALL dyn_spg( kstp, indic ) ! surface pressure gradient
[4292]	356	ENDIF
[1492]	357	CALL dyn_nxt( kstp ) ! lateral velocity at next time step
[3]	358
[4292]	359	CALL ssh_swp( kstp ) ! swap of sea surface height
	360	IF( lk_vvl ) CALL dom_vvl_sf_swp( kstp ) ! swap of vertical scale factors
[5656]	361	!
[5758]	362	write(,) 'after dom_vvl'
	363	CALL FLUSH ( numout )
	364
	365
	366	!!gm : This does not only concern the dynamics ==>>> add a new title
	367	!!gm2: why ouput restart before AGRIF update?
[5656]	368	IF( lrst_oce ) CALL rst_write( kstp ) ! write output ocean restart file
[593]	369
[5656]	370	#if defined key_agrif
	371	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	372	! AGRIF
	373	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	374	CALL Agrif_Integrate_ChildGrids( stp )
	375
	376	IF ( Agrif_NbStepint().EQ.0 ) THEN
	377	CALL Agrif_Update_Tra() ! Update active tracers
	378	CALL Agrif_Update_Dyn() ! Update momentum
	379	ENDIF
	380	#endif
[2528]	381	IF( ln_diahsb ) CALL dia_hsb( kstp ) ! - ML - global conservation diagnostics
	382	IF( lk_diaobs ) CALL dia_obs( kstp ) ! obs-minus-model (assimilation) diagnostics (call after dynamics update)
	383
[3]	384	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[5656]	385	! Control
[3]	386	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[1492]	387	CALL stp_ctl( kstp, indic )
	388	IF( indic < 0 ) THEN
	389	CALL ctl_stop( 'step: indic < 0' )
	390	CALL dia_wri_state( 'output.abort', kstp )
[1482]	391	ENDIF
[4147]	392	IF( kstp == nit000 ) THEN
[4624]	393	CALL iom_close( numror ) ! close input ocean restart file
	394	IF(lwm) CALL FLUSH ( numond ) ! flush output namelist oce
[5758]	395	IF(lwm.AND.numoni /= -1 ) &
	396	& CALL FLUSH ( numoni ) ! flush output namelist ice (if exist)
[4147]	397	ENDIF
[3]	398
[508]	399	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[75]	400	! Coupled mode
	401	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5758]	402	!!gm why lk_oasis and not lk_cpl ????
[5407]	403	IF( lk_oasis ) CALL sbc_cpl_snd( kstp ) ! coupled mode : field exchanges
[508]	404	!
[4153]	405	#if defined key_iomput
	406	IF( kstp == nitend .OR. indic < 0 ) THEN
[5407]	407	CALL iom_context_finalize( cxios_context ) ! needed for XIOS+AGRIF
	408	IF( ln_crs ) CALL iom_context_finalize( trim(cxios_context)//"_crs" ) !
[4152]	409	ENDIF
[4153]	410	#endif
[3769]	411	!
[3294]	412	IF( nn_timing == 1 .AND. kstp == nit000 ) CALL timing_reset
[1481]	413	!
[3]	414	END SUBROUTINE stp
	415
	416	!!======================================================================
	417	END MODULE step

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