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step.F90 in branches/2015/dev_r5003_MERCATOR6_CRS/NEMOGCM/NEMO/OPA_SRC – NEMO

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source: branches/2015/dev_r5003_MERCATOR6_CRS/NEMOGCM/NEMO/OPA_SRC/step.F90 @ 7795

Last change on this file since 7795 was 7256, checked in by cbricaud, 7 years ago
phaze NEMO routines in CRS branch with nemo_v3_6_STABLE branch at rev 7213 (09-09-2016) (merge -r 5519:7213 )
Property svn:keywords set to `Id`
File size: 25.0 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
[6101]	35	use wrk_nemo
[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
[7256]	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
[3]	76	INTEGER :: indic ! error indicator if < 0
[4338]	77	INTEGER :: kcall ! optional integer argument (dom_vvl_sf_nxt)
[6101]	78	REAL(wp), POINTER, DIMENSION(:,:,:) :: zrhop,zrhd
	79
[3]	80	!! ---------------------------------------------------------------------
	81
[392]	82	#if defined key_agrif
[389]	83	kstp = nit000 + Agrif_Nb_Step()
[7256]	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()
	87	ENDIF
	88
[4491]	89	IF ( kstp == (nit000 + 1) ) lk_agrif_fstep = .FALSE.
[7256]	90
[1793]	91	# if defined key_iomput
[5602]	92	IF( Agrif_Nbstepint() == 0 ) CALL iom_swap( cxios_context )
[3764]	93	# endif
	94	#endif
[4152]	95	indic = 0 ! reset to no error condition
	96	IF( kstp == nit000 ) THEN
[5602]	97	! must be done after nemo_init for AGRIF+XIOS+OASIS
	98	CALL iom_init( cxios_context ) ! iom_put initialization
[7217]	99	IF( lk_crs ) CALL iom_init( TRIM(cxios_context)//"_crs" ) ! initialize context for coarse grid
[4152]	100	ENDIF
[4147]	101
[1725]	102	IF( kstp /= nit000 ) CALL day( kstp ) ! Calendar (day was already called at nit000 in day_init)
[5602]	103	CALL iom_setkt( kstp - nit000 + 1, cxios_context ) ! tell iom we are at time step kstp
[7217]	104	IF( lk_crs ) CALL iom_setkt( kstp - nit000 + 1, TRIM(cxios_context)//"_crs" ) ! tell iom we are at time step kstp
[3]	105
	106	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[888]	107	! Update data, open boundaries, surface boundary condition (including sea-ice)
[3]	108	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[3294]	109	IF( lk_tide ) CALL sbc_tide( kstp )
[5602]	110	IF( lk_bdy ) THEN
	111	IF( ln_apr_dyn) CALL sbc_apr( kstp ) ! bdy_dta needs ssh_ib
	112	CALL bdy_dta ( kstp, time_offset=+1 ) ! update dynamic & tracer data at open boundaries
	113	ENDIF
[4292]	114	CALL sbc ( kstp ) ! Sea Boundary Condition (including sea-ice)
	115	! clem: moved here for bdy ice purpose
[5602]	116	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	117	! Update stochastic parameters and random T/S fluctuations
	118	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[7256]	119	IF( ln_sto_eos ) CALL sto_par( kstp ) ! Stochastic parameters
	120	IF( ln_sto_eos ) CALL sto_pts( tsn ) ! Random T/S fluctuations
[3]	121
	122	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[3294]	123	! Ocean physics update (ua, va, tsa used as workspace)
[3]	124	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[4990]	125	! THERMODYNAMICS
[6101]	126	CALL eos_rab( tsb, rab_b ) ! before local thermal/haline expension ratio at T-points
	127	CALL eos_rab( tsn, rab_n ) ! now local thermal/haline expension ratio at T-points
[4990]	128	CALL bn2 ( tsb, rab_b, rn2b ) ! before Brunt-Vaisala frequency
	129	CALL bn2 ( tsn, rab_n, rn2 ) ! now Brunt-Vaisala frequency
[1492]	130	!
[3764]	131	! VERTICAL PHYSICS
[4369]	132	CALL zdf_bfr( kstp ) ! bottom friction (if quadratic)
[1492]	133	! ! Vertical eddy viscosity and diffusivity coefficients
[2528]	134	IF( lk_zdfric ) CALL zdf_ric( kstp ) ! Richardson number dependent Kz
	135	IF( lk_zdftke ) CALL zdf_tke( kstp ) ! TKE closure scheme for Kz
	136	IF( lk_zdfgls ) CALL zdf_gls( kstp ) ! GLS closure scheme for Kz
	137	IF( lk_zdfkpp ) CALL zdf_kpp( kstp ) ! KPP closure scheme for Kz
[4292]	138	IF( lk_zdfcst ) THEN ! Constant Kz (reset avt, avm[uv] to the background value)
[5602]	139	avt (:,:,:) = rn_avt0 * wmask (:,:,:)
	140	avmu(:,:,:) = rn_avm0 * wumask(:,:,:)
	141	avmv(:,:,:) = rn_avm0 * wvmask(:,:,:)
[677]	142	ENDIF
[1492]	143	IF( ln_rnf_mouth ) THEN ! increase diffusivity at rivers mouths
[1246]	144	DO jk = 2, nkrnf ; avt(:,:,jk) = avt(:,:,jk) + 2.e0 * rn_avt_rnf * rnfmsk(:,:) * tmask(:,:,jk) ; END DO
[3]	145	ENDIF
[1492]	146	IF( ln_zdfevd ) CALL zdf_evd( kstp ) ! enhanced vertical eddy diffusivity
[3]	147
[1492]	148	IF( lk_zdftmx ) CALL zdf_tmx( kstp ) ! tidal vertical mixing
[3]	149
[888]	150	IF( lk_zdfddm .AND. .NOT. lk_zdfkpp ) &
[1492]	151	& CALL zdf_ddm( kstp ) ! double diffusive mixing
[3764]	152
[1492]	153	CALL zdf_mxl( kstp ) ! mixed layer depth
[3]	154
[2528]	155	! write TKE or GLS information in the restart file
[1531]	156	IF( lrst_oce .AND. lk_zdftke ) CALL tke_rst( kstp, 'WRITE' )
[2528]	157	IF( lrst_oce .AND. lk_zdfgls ) CALL gls_rst( kstp, 'WRITE' )
[1492]	158	!
[3764]	159	! LATERAL PHYSICS
[1492]	160	!
	161	IF( lk_ldfslp ) THEN ! slope of lateral mixing
[5602]	162	CALL eos( tsb, rhd, gdept_0(:,:,:) ) ! before in situ density
	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
	166	IF( ln_zps .AND. ln_isfcav) &
	167	& CALL zps_hde_isf( kstp, jpts, tsb, gtsu, gtsv, & ! Partial steps for top cell (ISF)
	168	& rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , &
	169	& gtui, gtvi, grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi ) ! of t, s, rd at the first ocean level
[2528]	170	IF( ln_traldf_grif ) THEN ! before slope for Griffies operator
	171	CALL ldf_slp_grif( kstp )
	172	ELSE
	173	CALL ldf_slp( kstp, rhd, rn2b ) ! before slope for Madec operator
	174	ENDIF
[1481]	175	ENDIF
[3]	176	#if defined key_traldf_c2d
[1492]	177	IF( lk_traldf_eiv ) CALL ldf_eiv( kstp ) ! eddy induced velocity coefficient
[2528]	178	#endif
[5602]	179	#if defined key_traldf_c3d && defined key_traldf_smag
[3634]	180	CALL ldf_tra_smag( kstp ) ! eddy induced velocity coefficient
	181	# endif
[5602]	182	#if defined key_dynldf_c3d && defined key_dynldf_smag
[3634]	183	CALL ldf_dyn_smag( kstp ) ! eddy induced velocity coefficient
	184	# endif
[3]	185
[4369]	186	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	187	! Ocean dynamics : hdiv, rot, ssh, e3, wn
	188	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	189	CALL ssh_nxt ( kstp ) ! after ssh (includes call to div_cur)
[4387]	190	IF( lk_vvl ) CALL dom_vvl_sf_nxt( kstp ) ! after vertical scale factors
	191	CALL wzv ( kstp ) ! now cross-level velocity
[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:
[4990]	197	CALL eos ( tsn, rhd, rhop, fsdept_n(:,:,:) ) ! now in situ density for hpg computation
[5602]	198	IF( ln_zps .AND. .NOT. ln_isfcav) &
	199	& CALL zps_hde ( kstp, jpts, tsn, gtsu, gtsv, & ! Partial steps: before horizontal gradient
	200	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
	201	IF( ln_zps .AND. ln_isfcav) &
	202	& CALL zps_hde_isf( kstp, jpts, tsn, gtsu, gtsv, & ! Partial steps for top cell (ISF)
	203	& rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , &
	204	& gtui, gtvi, grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi ) ! of t, s, rd at the last ocean level
[4369]	205
	206	ua(:,:,:) = 0.e0 ! set dynamics trends to zero
	207	va(:,:,:) = 0.e0
[7256]	208	IF( lk_asminc .AND. ln_asmiau .AND. &
[4369]	209	& ln_dyninc ) CALL dyn_asm_inc ( kstp ) ! apply dynamics assimilation increment
	210	IF( ln_neptsimp ) CALL dyn_nept_cor ( kstp ) ! subtract Neptune velocities (simplified)
	211	IF( lk_bdy ) CALL bdy_dyn3d_dmp( kstp ) ! bdy damping trends
	212	CALL dyn_adv ( kstp ) ! advection (vector or flux form)
	213	CALL dyn_vor ( kstp ) ! vorticity term including Coriolis
	214	CALL dyn_ldf ( kstp ) ! lateral mixing
	215	IF( ln_neptsimp ) CALL dyn_nept_cor ( kstp ) ! add Neptune velocities (simplified)
	216	#if defined key_agrif
	217	IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_dyn ! momentum sponge
	218	#endif
	219	CALL dyn_hpg( kstp ) ! horizontal gradient of Hydrostatic pressure
	220	CALL dyn_spg( kstp, indic ) ! surface pressure gradient
	221
	222	ua_sv(:,:,:) = ua(:,:,:) ! Save trends (barotropic trend has been fully updated at this stage)
	223	va_sv(:,:,:) = va(:,:,:)
	224
	225	CALL div_cur( kstp ) ! Horizontal divergence & Relative vorticity (2nd call in time-split case)
[4387]	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
[1482]	230	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[3294]	231	! diagnostics and outputs (ua, va, tsa used as workspace)
[1482]	232	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5602]	233	IF( lk_floats ) CALL flo_stp( kstp ) ! drifting Floats
	234	IF( lk_diahth ) CALL dia_hth( kstp ) ! Thermocline depth (20 degres isotherm depth)
	235	IF( .NOT. ln_cpl ) CALL dia_fwb( kstp ) ! Fresh water budget diagnostics
	236	IF( lk_diadct ) CALL dia_dct( kstp ) ! Transports
	237	IF( lk_diaar5 ) CALL dia_ar5( kstp ) ! ar5 diag
	238	IF( lk_diaharm ) CALL dia_harm( kstp ) ! Tidal harmonic analysis
	239	CALL dia_wri( kstp ) ! ocean model: outputs
[4152]	240	!
[7217]	241	IF( lk_crs ) CALL crs_fld( kstp ) ! ocean model: online field coarsening & output
[1482]	242
[6101]	243	CALL wrk_alloc( jpi, jpj, jpk, zrhop, zrhd )
	244	CALL eos( tsn, zrhd, zrhop, fsdept_n(:,:,:) ) ! now in situ and potential density
	245	zrhop(:,:,jpk) = 0._wp
	246	CALL iom_put( 'rhop', zrhop )
	247
	248	CALL wrk_dealloc( jpi, jpj, jpk, zrhop, zrhd )
	249
[923]	250	#if defined key_top
[3]	251	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	252	! Passive Tracer Model
	253	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[7217]	254	IF( lk_crs ) THEN
[5105]	255	CALL dom_grid_crs
[5601]	256
[6772]	257	CALL zdf_mxl_crs(kstp)
	258	CALL eos_crs ( tsn_crs, rhd_crs, rhop_crs, fsdept_crs(:,:,:) ) ! now in situ density for hpg computation
[5601]	259
	260	IF( ln_zps ) CALL zps_hde_crs( kstp, jpts, tsb_crs, gtsu_crs, gtsv_crs, rhd_crs, gru_crs, grv_crs )
	261
[5105]	262	IF( lk_ldfslp .AND. .NOT. ln_traldf_grif ) &
	263	CALL ldf_slp_crs( kstp, rhd_crs, rb2_crs )
	264	CALL dom_grid_glo
[5601]	265
[5105]	266	ENDIF
	267
	268	IF( ln_crs_top ) CALL dom_grid_crs
	269
[1492]	270	CALL trc_stp( kstp ) ! time-stepping
[5105]	271
	272	IF( ln_crs_top ) CALL dom_grid_glo
[6101]	273
[3]	274	#endif
	275
[4990]	276
[3]	277	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[1492]	278	! Active tracers (ua, va used as workspace)
[3]	279	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[2528]	280	tsa(:,:,:,:) = 0.e0 ! set tracer trends to zero
[3]	281
[7256]	282	IF( lk_asminc .AND. ln_asmiau .AND. &
[2528]	283	& ln_trainc ) CALL tra_asm_inc( kstp ) ! apply tracer assimilation increment
[467]	284	CALL tra_sbc ( kstp ) ! surface boundary condition
	285	IF( ln_traqsr ) CALL tra_qsr ( kstp ) ! penetrative solar radiation qsr
[2528]	286	IF( ln_trabbc ) CALL tra_bbc ( kstp ) ! bottom heat flux
	287	IF( lk_trabbl ) CALL tra_bbl ( kstp ) ! advective (and/or diffusive) bottom boundary layer scheme
[3294]	288	IF( ln_tradmp ) CALL tra_dmp ( kstp ) ! internal damping trends
[3651]	289	IF( lk_bdy ) CALL bdy_tra_dmp( kstp ) ! bdy damping trends
[467]	290	CALL tra_adv ( kstp ) ! horizontal & vertical advection
[2528]	291	IF( lk_zdfkpp ) CALL tra_kpp ( kstp ) ! KPP non-local tracer fluxes
[467]	292	CALL tra_ldf ( kstp ) ! lateral mixing
[5602]	293
	294	IF( ln_diaptr ) CALL dia_ptr ! Poleward adv/ldf TRansports diagnostics
	295
[392]	296	#if defined key_agrif
[782]	297	IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_tra ! tracers sponge
[389]	298	#endif
[1111]	299	CALL tra_zdf ( kstp ) ! vertical mixing and after tracer fields
[1239]	300
[1492]	301	IF( ln_dynhpg_imp ) THEN ! semi-implicit hpg (time stepping then eos)
[2528]	302	IF( ln_zdfnpc ) CALL tra_npc( kstp ) ! update after fields by non-penetrative convection
	303	CALL tra_nxt( kstp ) ! tracer fields at next time step
[4292]	304	CALL eos ( tsa, rhd, rhop, fsdept_n(:,:,:) ) ! Time-filtered in situ density for hpg computation
[5602]	305	IF( ln_zps .AND. .NOT. ln_isfcav) &
	306	& CALL zps_hde ( kstp, jpts, tsa, gtsu, gtsv, & ! Partial steps: before horizontal gradient
	307	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
	308	IF( ln_zps .AND. ln_isfcav) &
	309	& CALL zps_hde_isf( kstp, jpts, tsa, gtsu, gtsv, & ! Partial steps for top cell (ISF)
	310	& rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , &
	311	& gtui, gtvi, grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi ) ! of t, s, rd at the last ocean level
[4215]	312	ELSE ! centered hpg (eos then time stepping)
[4292]	313	IF ( .NOT. lk_dynspg_ts ) THEN ! eos already called in time-split case
[4990]	314	CALL eos ( tsn, rhd, rhop, fsdept_n(:,:,:) ) ! now in situ density for hpg computation
[5602]	315	IF( ln_zps .AND. .NOT. ln_isfcav) &
	316	& CALL zps_hde ( kstp, jpts, tsn, gtsu, gtsv, & ! Partial steps: before horizontal gradient
	317	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
	318	IF( ln_zps .AND. ln_isfcav) &
	319	& CALL zps_hde_isf( kstp, jpts, tsn, gtsu, gtsv, & ! Partial steps for top cell (ISF)
	320	& rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , &
	321	& gtui, gtvi, grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi ) ! of t, s, rd at the last ocean level
[4292]	322	ENDIF
[2528]	323	IF( ln_zdfnpc ) CALL tra_npc( kstp ) ! update after fields by non-penetrative convection
	324	CALL tra_nxt( kstp ) ! tracer fields at next time step
[3764]	325	ENDIF
[1481]	326
[3]	327	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[3294]	328	! Dynamics (tsa used as workspace)
[3]	329	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[4292]	330	IF( lk_dynspg_ts ) THEN
	331	! revert to previously computed momentum tendencies
	332	! (not using ua, va as temporary arrays during tracers' update could avoid that)
	333	ua(:,:,:) = ua_sv(:,:,:)
	334	va(:,:,:) = va_sv(:,:,:)
	335	! Revert now divergence and rotational to previously computed ones
	336	!(needed because of the time swap in div_cur, at the beginning of each time step)
	337	hdivn(:,:,:) = hdivb(:,:,:)
	338	rotn(:,:,:) = rotb(:,:,:)
	339
	340	CALL dyn_bfr( kstp ) ! bottom friction
	341	CALL dyn_zdf( kstp ) ! vertical diffusion
	342	ELSE
[1492]	343	ua(:,:,:) = 0.e0 ! set dynamics trends to zero
[75]	344	va(:,:,:) = 0.e0
[3]	345
[7256]	346	IF( lk_asminc .AND. ln_asmiau .AND. &
[4292]	347	& ln_dyninc ) CALL dyn_asm_inc( kstp ) ! apply dynamics assimilation increment
	348	IF( ln_bkgwri ) CALL asm_bkg_wri( kstp ) ! output background fields
	349	IF( ln_neptsimp ) CALL dyn_nept_cor( kstp ) ! subtract Neptune velocities (simplified)
	350	IF( lk_bdy ) CALL bdy_dyn3d_dmp(kstp ) ! bdy damping trends
[1492]	351	CALL dyn_adv( kstp ) ! advection (vector or flux form)
	352	CALL dyn_vor( kstp ) ! vorticity term including Coriolis
	353	CALL dyn_ldf( kstp ) ! lateral mixing
[4292]	354	IF( ln_neptsimp ) CALL dyn_nept_cor( kstp ) ! add Neptune velocities (simplified)
[392]	355	#if defined key_agrif
[4292]	356	IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_dyn ! momemtum sponge
[389]	357	#endif
[1492]	358	CALL dyn_hpg( kstp ) ! horizontal gradient of Hydrostatic pressure
[3764]	359	CALL dyn_bfr( kstp ) ! bottom friction
[1492]	360	CALL dyn_zdf( kstp ) ! vertical diffusion
	361	CALL dyn_spg( kstp, indic ) ! surface pressure gradient
[4292]	362	ENDIF
[1492]	363	CALL dyn_nxt( kstp ) ! lateral velocity at next time step
[3]	364
[4292]	365	CALL ssh_swp( kstp ) ! swap of sea surface height
	366	IF( lk_vvl ) CALL dom_vvl_sf_swp( kstp ) ! swap of vertical scale factors
[7256]	367	!
[2528]	368	IF( ln_diahsb ) CALL dia_hsb( kstp ) ! - ML - global conservation diagnostics
	369
[7256]	370	IF( lrst_oce ) CALL rst_write( kstp ) ! write output ocean restart file
	371	IF( ln_sto_eos ) CALL sto_rst_write( kstp ) ! write restart file for stochastic parameters
	372
	373	#if defined key_agrif
[3]	374	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[7256]	375	! AGRIF
	376	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	377	CALL Agrif_Integrate_ChildGrids( stp )
	378
	379	IF ( Agrif_NbStepint().EQ.0 ) THEN
	380	CALL Agrif_Update_Tra() ! Update active tracers
	381	CALL Agrif_Update_Dyn() ! Update momentum
	382	ENDIF
	383	#endif
	384	IF( lk_diaobs ) CALL dia_obs( kstp ) ! obs-minus-model (assimilation) diagnostics (call after dynamics update)
	385
	386	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	387	! Control
[3]	388	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[1492]	389	CALL stp_ctl( kstp, indic )
	390	IF( indic < 0 ) THEN
	391	CALL ctl_stop( 'step: indic < 0' )
	392	CALL dia_wri_state( 'output.abort', kstp )
[1482]	393	ENDIF
[4147]	394	IF( kstp == nit000 ) THEN
[4624]	395	CALL iom_close( numror ) ! close input ocean restart file
	396	IF(lwm) CALL FLUSH ( numond ) ! flush output namelist oce
[5602]	397	IF( lwm.AND.numoni /= -1 ) CALL FLUSH ( numoni ) ! flush output namelist ice
[4147]	398	ENDIF
[3]	399
[508]	400	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[75]	401	! Coupled mode
	402	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[5602]	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
[5602]	407	CALL iom_context_finalize( cxios_context ) ! needed for XIOS+AGRIF
[7217]	408	IF( lk_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
[7256]	413	!
[1481]	414	!
[3]	415	END SUBROUTINE stp
	416
	417	!!======================================================================
	418	END MODULE step

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