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source: trunk/NEMO/OPA_SRC/step.F90 @ 699

Last change on this file since 699 was 699, checked in by smasson, 17 years ago
insert revision Id
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 23.3 KB

Rev	Line
[3]	1	MODULE step
	2	!!======================================================================
	3	!! * MODULE step *
	4	!! Time-stepping : manager of the ocean, tracer and ice time stepping
	5	!!======================================================================
[508]	6	!! History : ! 91-03 () Original code
	7	!! ! 91-11 (G. Madec)
	8	!! ! 92-06 (M. Imbard) add a first output record
	9	!! ! 96-04 (G. Madec) introduction of dynspg
	10	!! ! 96-04 (M.A. Foujols) introduction of passive tracer
	11	!! 8.0 ! 97-06 (G. Madec) new architecture of call
	12	!! 8.2 ! 97-06 (G. Madec, M. Imbard, G. Roullet) free surface
	13	!! 8.2 ! 99-02 (G. Madec, N. Grima) hpg implicit
	14	!! 8.2 ! 00-07 (J-M Molines, M. Imbard) Open Bondary Conditions
	15	!! 9.0 ! 02-06 (G. Madec) free form, suppress macro-tasking
	16	!! " " ! 04-08 (C. Talandier) New trends organization
	17	!! " " ! 05-01 (C. Ethe) Add the KPP closure scheme
	18	!! " " ! 05-11 (V. Garnier) Surface pressure gradient organization
	19	!! " " ! 05-11 (G. Madec) Reorganisation of tra and dyn calls
	20	!! " " ! 06-01 (L. Debreu, C. Mazauric) Agrif implementation
	21	!! " " ! 06-07 (S. Masson) restart using iom
[3]	22	!!----------------------------------------------------------------------
	23	!! stp : OPA system time-stepping
	24	!!----------------------------------------------------------------------
	25	USE oce ! ocean dynamics and tracers variables
	26	USE dom_oce ! ocean space and time domain variables
	27	USE zdf_oce ! ocean vertical physics variables
[467]	28	USE ldftra_oce ! ocean tracer - trends
	29	USE ldfdyn_oce ! ocean dynamics - trends
[216]	30	USE cpl_oce ! coupled ocean-atmosphere variables
[3]	31	USE in_out_manager ! I/O manager
[508]	32	USE iom
[3]	33	USE lbclnk
	34
	35	USE daymod ! calendar (day routine)
	36
	37	USE dtatem ! ocean temperature data (dta_tem routine)
	38	USE dtasal ! ocean salinity data (dta_sal routine)
[294]	39	USE dtasst ! ocean sea surface temperature (dta_sst routine)
[434]	40	USE dtasss ! ocean sea surface salinity (dta_sss routine)
[3]	41	USE taumod ! surface stress (tau routine)
	42	USE flxmod ! thermohaline fluxes (flx routine)
	43	USE ocesbc ! thermohaline fluxes (oce_sbc routine)
	44	USE flxrnf ! runoffs (flx_rnf routine)
	45	USE flxfwb ! freshwater budget correction (flx_fwb routine)
	46	USE closea ! closed sea freshwater budget (flx_clo routine)
	47	USE ocfzpt ! surface ocean freezing point (oc_fz_pt routine)
	48
[187]	49	USE trcstp ! passive tracer time-stepping (trc_stp routine)
[3]	50
[467]	51	USE traqsr ! solar radiation penetration (tra_qsr routine)
	52	USE trasbc ! surface boundary condition (tra_sbc routine)
[3]	53	USE trabbc ! bottom boundary condition (tra_bbc routine)
	54	USE trabbl ! bottom boundary layer (tra_bbl routine)
	55	USE tradmp ! internal damping (tra_dmp routine)
[467]	56	USE traadv ! advection scheme control (tra_adv_ctl routine)
	57	USE traldf ! lateral mixing (tra_ldf routine)
	58	USE cla ! cross land advection (tra_cla routine)
	59	! zdfkpp ! KPP non-local tracer fluxes (tra_kpp routine)
	60	USE trazdf ! vertical mixing (tra_zdf routine)
	61	USE tranxt ! time-stepping (tra_nxt routine)
[3]	62	USE tranpc ! non-penetrative convection (tra_npc routine)
	63
	64	USE eosbn2 ! equation of state (eos_bn2 routine)
	65
[643]	66	USE dynadv ! advection (dyn_adv routine)
	67	USE dynvor ! vorticity term (dyn_vor routine)
[467]	68	USE dynhpg ! hydrostatic pressure grad. (dyn_hpg routine)
	69	USE dynldf ! lateral momentum diffusion (dyn_ldf routine)
	70	USE dynzdf ! vertical diffusion (dyn_zdf routine)
	71	USE dynspg_oce ! surface pressure gradient (dyn_spg routine)
	72	USE dynspg ! surface pressure gradient (dyn_spg routine)
	73	USE dynnxt ! time-stepping (dyn_nxt routine)
	74
[3]	75	USE obc_par ! open boundary condition variables
	76	USE obcdta ! open boundary condition data (obc_dta routine)
	77	USE obcrst ! open boundary cond. restart (obc_rst routine)
	78	USE obcrad ! open boundary cond. radiation (obc_rad routine)
	79	USE obcspg ! open boundary cond spg (obc_spg routine)
	80
	81	USE divcur ! hor. divergence and curl (div & cur routines)
	82	USE cla_div ! cross land: hor. divergence (div_cla routine)
	83	USE wzvmod ! vertical velocity (wzv routine)
	84
	85	USE ldfslp ! iso-neutral slopes (ldf_slp routine)
	86	USE ldfeiv ! eddy induced velocity coef. (ldf_eiv routine)
	87
	88	USE zdfbfr ! bottom friction (zdf_bfr routine)
	89	USE zdftke ! TKE vertical mixing (zdf_tke routine)
[467]	90	USE zdftke_jki ! TKE vertical mixing (zdf_tke routine)
[255]	91	USE zdfkpp ! KPP vertical mixing (zdf_kpp routine)
[3]	92	USE zdfddm ! double diffusion mixing (zdf_ddm routine)
	93	USE zdfevd ! enhanced vertical diffusion (zdf_evd routine)
	94	USE zdfric ! Richardson vertical mixing (zdf_ric routine)
	95	USE zdfmxl ! Mixed-layer depth (zdf_mxl routine)
	96
	97	USE zpshde ! partial step: hor. derivative (zps_hde routine)
	98	USE ice_oce ! sea-ice variable
	99	USE icestp ! sea-ice time-stepping (ice_stp routine)
	100
	101	USE diawri ! Standard run outputs (dia_wri routine)
[216]	102	USE trdicp ! Ocean momentum/tracers trends (trd_wri routine)
[3]	103	USE trdmld ! mixed-layer trends (trd_mld routine)
[503]	104	USE trdmld_rst ! restart for mixed-layer trends
	105	USE trdmod_oce ! ocean momentum/tracers trends
[108]	106	USE trdvor ! vorticity budget (trd_vor routine)
[216]	107	USE diagap ! hor. mean model-data gap (dia_gap routine)
[3]	108	USE diahdy ! dynamic height (dia_hdy routine)
[132]	109	USE diaptr ! poleward transports (dia_ptr routine)
[3]	110	USE diahth ! thermocline depth (dia_hth routine)
	111	USE diafwb ! freshwater budget (dia_fwb routine)
	112	USE diaspr ! suface pressure (rigid-lid) (dia_spr routine)
	113	USE flo_oce ! floats variables
	114	USE floats ! floats computation (flo_stp routine)
	115
	116	USE stpctl ! time stepping control (stp_ctl routine)
[75]	117	USE restart ! ocean restart (rst_wri routine)
	118	USE cpl ! exchanges in coupled mode (cpl_stp routine)
[258]	119	USE prtctl ! Print control (prt_ctl routine)
[593]	120	USE domvvl ! variable volume (dom_vvl routine)
[3]	121
[392]	122	#if defined key_agrif
[389]	123	USE agrif_opa_sponge ! Momemtum and tracers sponges
	124	#endif
	125
[3]	126	IMPLICIT NONE
	127	PRIVATE
	128
	129	PUBLIC stp ! called by opa.F90
	130
	131	!! * Substitutions
	132	# include "domzgr_substitute.h90"
	133	# include "zdfddm_substitute.h90"
	134	!!----------------------------------------------------------------------
[247]	135	!! OPA 9.0 , LOCEAN-IPSL (2005)
[699]	136	!! $Id$
[508]	137	!! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt)
[3]	138	!!----------------------------------------------------------------------
	139
	140	CONTAINS
	141
[508]	142	#if defined key_agrif
	143	SUBROUTINE stp( )
	144	#else
[467]	145	SUBROUTINE stp( kstp )
	146	#endif
	147	!!----------------------------------------------------------------------
[3]	148	!! * ROUTINE stp *
	149	!!
	150	!! ** Purpose : - Time stepping of OPA (momentum and active tracer eqs.)
	151	!! - Time stepping of LIM (dynamic and thermodynamic eqs.)
	152	!! - Tme stepping of TRC (passive tracer eqs.)
	153	!!
	154	!! ** Method : -1- Update forcings and data
	155	!! -2- Update ocean physics
	156	!! -3- Compute the t and s trends
	157	!! -4- Update t and s
	158	!! -5- Compute the momentum trends
	159	!! -6- Update the horizontal velocity
	160	!! -7- Compute the diagnostics variables (rd,N2, div,cur,w)
	161	!! -8- Outputs and diagnostics
	162	!!----------------------------------------------------------------------
	163	!! * Arguments
[508]	164	#if defined key_agrif
	165	INTEGER :: kstp ! ocean time-step index
	166	#else
[467]	167	INTEGER, INTENT( in ) :: kstp ! ocean time-step index
[389]	168	#endif
[3]	169
	170	!! * local declarations
	171	INTEGER :: indic ! error indicator if < 0
	172	!! ---------------------------------------------------------------------
	173
[392]	174	#if defined key_agrif
[389]	175	kstp = nit000 + Agrif_Nb_Step()
[445]	176	! IF ( Agrif_Root() .and. lwp) Write(,) '---'
[508]	177	! IF (lwp) Write(,) 'Grid Number',Agrif_Fixed(),' time step ',kstp
[389]	178	#endif
[3]	179	indic = 1 ! reset to no error condition
[508]	180
[3]	181	adatrj = adatrj + rdt/86400._wp
	182
	183	CALL day( kstp ) ! Calendar
	184
[508]	185	CALL rst_opn( kstp ) ! Open the restart file
	186
[3]	187	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	188	! Update data, open boundaries and Forcings
	189	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	190
	191	IF( lk_dtatem ) CALL dta_tem( kstp ) ! update 3D temperature data
	192
	193	IF( lk_dtasal ) CALL dta_sal( kstp ) ! Salinity data
	194
	195	IF( lk_dtasst ) CALL dta_sst( kstp ) ! Sea Surface Temperature data
	196
[467]	197	IF( lk_dtasss ) CALL dta_sss( kstp ) ! Sea Surface Salinity data
[434]	198
[35]	199	IF( lk_obc ) CALL obc_dta( kstp ) ! update dynamic and tracer data at open boundaries
[3]	200
	201	IF( lk_obc ) CALL obc_rad( kstp ) ! compute phase velocities at open boundaries
	202
[604]	203	IF( .NOT. lk_core ) CALL tau( kstp ) ! wind stress
[3]	204
	205	CALL flx_rnf( kstp ) ! runoff data
	206
	207	CALL flx( kstp ) ! heat and freshwater fluxes
	208
	209	IF( lk_ice_lim ) CALL ice_stp( kstp ) ! sea-ice model (Update stress & fluxes)
	210
	211	CALL oce_sbc( kstp ) ! ocean surface boudaries
	212
	213	IF( ln_fwb ) CALL flx_fwb( kstp ) ! freshwater budget
	214
	215	IF( nclosea == 1 ) CALL flx_clo( kstp ) ! closed sea in the domain (update freshwater fluxes)
	216
	217	IF( kstp == nit000 ) THEN
	218	IF( ninist == 1 ) THEN ! Output the initial state and forcings
	219	CALL dia_wri_state( 'output.init' )
	220	ENDIF
	221	ENDIF
	222
[258]	223	IF(ln_ctl) THEN ! print mean trends (used for debugging)
	224	CALL prt_ctl(tab2d_1=emp , clinfo1=' emp - : ', mask1=tmask, ovlap=1)
	225	CALL prt_ctl(tab2d_1=emps , clinfo1=' emps - : ', mask1=tmask, ovlap=1)
	226	CALL prt_ctl(tab2d_1=qt , clinfo1=' qt - : ', mask1=tmask, ovlap=1)
	227	CALL prt_ctl(tab2d_1=qsr , clinfo1=' qsr - : ', mask1=tmask, ovlap=1)
	228	CALL prt_ctl(tab2d_1=runoff , clinfo1=' runoff : ', mask1=tmask, ovlap=1)
	229	CALL prt_ctl(tab3d_1=tmask , clinfo1=' tmask : ', mask1=tmask, ovlap=1, kdim=jpk)
	230	CALL prt_ctl(tab3d_1=tn , clinfo1=' sst - : ', mask1=tmask, ovlap=1, kdim=1)
	231	CALL prt_ctl(tab3d_1=sn , clinfo1=' sss - : ', mask1=tmask, ovlap=1, kdim=1)
[516]	232	CALL prt_ctl(tab2d_1=taux , clinfo1=' tau - x : ', mask1=umask, &
	233	& tab2d_2=tauy , clinfo2=' - y : ', mask2=vmask,ovlap=1)
[3]	234	ENDIF
	235
	236
	237	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	238	! Ocean physics update
	239	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	240	!-----------------------------------------------------------------------
	241	! VERTICAL PHYSICS
	242	!-----------------------------------------------------------------------
	243	! N.B. ua, va, ta, sa arrays are used as workspace in this section
	244	!-----------------------------------------------------------------------
	245
	246	CALL bn2( tb, sb, rn2 ) ! before Brunt-Vaisala frequency
	247
	248	! ! Vertical eddy viscosity and diffusivity coefficients
	249	IF( lk_zdfric ) CALL zdf_ric( kstp ) ! Richardson number dependent Kz
[467]	250	#if defined key_mpp_omp
	251	IF( lk_zdftke ) CALL zdf_tke_jki( kstp ) ! TKE closure scheme for Kz - j-k-i loops
	252	#else
[3]	253	IF( lk_zdftke ) CALL zdf_tke( kstp ) ! TKE closure scheme for Kz
[467]	254	#endif
[255]	255	IF( lk_zdfkpp ) CALL zdf_kpp( kstp ) ! KPP closure scheme for Kz
[467]	256
[677]	257	IF( lk_zdfcst ) THEN ! Constant Kz (reset avt, avm[uv] to the background value)
	258	avt (:,:,:) = avt0 * tmask(:,:,:)
	259	avmu(:,:,:) = avm0 * umask(:,:,:)
	260	avmv(:,:,:) = avm0 * vmask(:,:,:)
	261	ENDIF
[3]	262
[236]	263	IF( cp_cfg == "orca" ) THEN ! ORCA: Reduce vertical mixing in some specific areas
[3]	264	SELECT CASE ( jp_cfg )
	265	CASE ( 05 ) ! ORCA R2 configuration
	266	avt (:,:,2) = avt (:,:,2) + 1.e-3 * upsrnfh(:,:) ! increase diffusivity of rivers mouths
[467]	267	CASE ( 025 ) ! ORCA R025 configuration
	268	avt (:,:,2) = avt (:,:,2) + 2.e-3 * upsrnfh(:,:) ! increase diffusivity of rivers mouths
[3]	269	END SELECT
	270	ENDIF
	271
	272	IF( ln_zdfevd ) CALL zdf_evd( kstp ) ! enhanced vertical eddy diffusivity
	273
[255]	274	IF( lk_zdfddm .AND. .NOT. lk_zdfkpp) &
	275	& CALL zdf_ddm( kstp ) ! double diffusive mixing
[3]	276
[75]	277	CALL zdf_bfr( kstp ) ! bottom friction
[3]	278
	279	CALL zdf_mxl( kstp ) ! mixed layer depth
	280
	281
	282	!-----------------------------------------------------------------------
	283	! LATERAL PHYSICS
	284	!-----------------------------------------------------------------------
	285	! N.B. ua, va, ta, sa arrays are used as workspace in this section
	286	!-----------------------------------------------------------------------
	287
	288	IF( lk_ldfslp ) CALL ldf_slp( kstp, rhd, rn2 ) ! before slope of the lateral mixing
	289
	290	#if defined key_traldf_c2d
	291	IF( lk_traldf_eiv ) CALL ldf_eiv( kstp ) ! eddy induced velocity coefficient
	292	#endif
	293
	294
	295	#if defined key_passivetrc
	296	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	297	! Passive Tracer Model
	298	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	299	! N.B. ua, va, ta, sa arrays are used as workspace in this section
	300	!-----------------------------------------------------------------------
	301
[345]	302	CALL trc_stp( kstp, indic ) ! time-stepping
[3]	303
	304	#endif
	305
	306
	307	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	308	! Active tracers
	309	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	310	! N.B. ua, va arrays are used as workspace in this section
	311	!-----------------------------------------------------------------------
	312
[467]	313	ta(:,:,:) = 0.e0 ! set tracer trends to zero
	314	sa(:,:,:) = 0.e0
[3]	315
[467]	316	CALL tra_sbc ( kstp ) ! surface boundary condition
[3]	317
[467]	318	IF( ln_traqsr ) CALL tra_qsr ( kstp ) ! penetrative solar radiation qsr
[3]	319
[467]	320	IF( lk_trabbc ) CALL tra_bbc ( kstp ) ! bottom heat flux
[3]	321
[467]	322	IF( lk_trabbl_dif ) CALL tra_bbl_dif( kstp ) ! diffusive bottom boundary layer scheme
	323	IF( lk_trabbl_adv ) CALL tra_bbl_adv( kstp ) ! advective (and/or diffusive) bottom boundary layer scheme
[3]	324
[467]	325	IF( lk_tradmp ) CALL tra_dmp ( kstp ) ! internal damping trends
[3]	326
[467]	327	CALL tra_adv ( kstp ) ! horizontal & vertical advection
[3]	328
[467]	329	IF( n_cla == 1 ) CALL tra_cla ( kstp ) ! Cross Land Advection (Update Hor. advection)
[3]	330
[467]	331	IF( lk_zdfkpp ) CALL tra_kpp ( kstp ) ! KPP non-local tracer fluxes
[3]	332
[467]	333	CALL tra_ldf ( kstp ) ! lateral mixing
[392]	334	#if defined key_agrif
[508]	335	IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_tra( kstp ) ! tracers sponge
[389]	336	#endif
[467]	337	CALL tra_zdf ( kstp ) ! vertical mixing
[3]	338
[467]	339	CALL tra_nxt( kstp ) ! tracer fields at next time step
[3]	340
[467]	341	IF( ln_zdfnpc ) CALL tra_npc( kstp ) ! update the new (t,s) fields by non
	342	! ! penetrative convective adjustment
[3]	343
[467]	344	IF( ln_dynhpg_imp ) THEN ! semi-implicit hpg
	345	CALL eos( ta, sa, rhd, rhop ) ! Time-filtered in situ density used in dynhpg module
	346	IF( ln_zps ) CALL zps_hde( kstp, ta, sa, rhd, & ! Partial steps: time filtered hor. gradient
	347	& gtu, gsu, gru, & ! of t, s, rd at the bottom ocean level
	348	& gtv, gsv, grv )
	349	ELSE ! centered hpg (default case)
	350	CALL eos( tb, sb, rhd, rhop ) ! now (swap=before) in situ density for dynhpg module
	351	IF( ln_zps ) CALL zps_hde( kstp, tb, sb, rhd, & ! Partial steps: now horizontal gradient
	352	& gtu, gsu, gru, & ! of t, s, rd at the bottom ocean level
	353	& gtv, gsv, grv )
[3]	354	ENDIF
	355
	356	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	357	! Dynamics
	358	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	359	! N.B. ta, sa arrays are used as workspace in this section
	360	!-----------------------------------------------------------------------
	361
[467]	362
[75]	363	ua(:,:,:) = 0.e0 ! set dynamics trends to zero
	364	va(:,:,:) = 0.e0
[3]	365
[643]	366	CALL dyn_adv( kstp ) ! advection (vector or flux form)
[3]	367
[467]	368	CALL dyn_vor( kstp ) ! vorticity term including Coriolis
[3]	369
[467]	370	CALL dyn_ldf( kstp ) ! lateral mixing
[392]	371	#if defined key_agrif
[508]	372	IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_dyn( kstp ) ! momemtum sponge
[389]	373	#endif
[467]	374	CALL dyn_hpg( kstp ) ! horizontal gradient of Hydrostatic pressure
[3]	375
[467]	376	CALL dyn_zdf( kstp ) ! vertical diffusion
[3]	377
[467]	378	IF( lk_dynspg_rl ) THEN
[75]	379	IF( lk_obc ) CALL obc_spg( kstp ) ! surface pressure gradient at open boundaries
[3]	380	ENDIF
	381	indic=0
	382	!i bug lbc sur emp
	383	CALL lbc_lnk( emp, 'T', 1. )
	384	!i
[359]	385	CALL dyn_spg( kstp, indic ) ! surface pressure gradient
[3]	386
[467]	387	CALL dyn_nxt( kstp ) ! lateral velocity at next time step
[3]	388
[593]	389	IF( lk_vvl ) CALL dom_vvl ! vertical mesh at next time step
[3]	390
[593]	391
[3]	392	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	393	! Computation of diagnostic variables
	394	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	395	! N.B. ua, va, ta, sa arrays are used as workspace in this section
	396	!-----------------------------------------------------------------------
	397
	398	CALL oc_fz_pt ! ocean surface freezing temperature
	399
	400	CALL div_cur( kstp ) ! Horizontal divergence & Relative vorticity
	401
	402	IF( n_cla == 1 ) CALL div_cla( kstp ) ! Cross Land Advection (Update Hor. divergence)
	403
	404	CALL wzv( kstp ) ! Vertical velocity
	405
	406
	407
	408	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[508]	409	! Control, and restarts
[3]	410	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	411	! N.B. ua, va, ta, sa arrays are used as workspace in this section
	412	!-----------------------------------------------------------------------
[508]	413	! ! Time loop: control and print
	414	CALL stp_ctl( kstp, indic )
	415	IF( indic < 0 ) CALL ctl_stop( 'step: indic < 0' )
[3]	416
[508]	417	IF( kstp == nit000 ) CALL iom_close( numror ) ! close input ocean restart file
	418	IF( lrst_oce ) CALL rst_write ( kstp ) ! write output ocean restart file
	419	IF( lk_obc ) CALL obc_rst_wri( kstp ) ! write open boundary restart file
[3]	420
[508]	421	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	422	! diagnostics and outputs
	423	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	424	! N.B. ua, va, ta, sa arrays are used as workspace in this section
	425	!-----------------------------------------------------------------------
	426
	427	IF ( nstop == 0 ) THEN ! Diagnostics
[75]	428	IF( lk_floats ) CALL flo_stp( kstp ) ! drifting Floats
[216]	429	IF( lk_trddyn ) CALL trd_dwr( kstp ) ! trends: dynamics
	430	IF( lk_trdtra ) CALL trd_twr( kstp ) ! trends: active tracers
[75]	431	IF( lk_trdmld ) CALL trd_mld( kstp ) ! trends: Mixed-layer
[108]	432	IF( lk_trdvor ) CALL trd_vor( kstp ) ! trends: vorticity budget
[75]	433	IF( lk_diaspr ) CALL dia_spr( kstp ) ! Surface pressure diagnostics
	434	IF( lk_diahth ) CALL dia_hth( kstp ) ! Thermocline depth (20 degres isotherm depth)
	435	IF( lk_diagap ) CALL dia_gap( kstp ) ! basin averaged diagnostics
	436	IF( lk_diahdy ) CALL dia_hdy( kstp ) ! dynamical heigh diagnostics
	437	IF( lk_diafwb ) CALL dia_fwb( kstp ) ! Fresh water budget diagnostics
[414]	438	IF( ln_diaptr ) CALL dia_ptr( kstp ) ! Poleward TRansports diagnostics
[132]	439
[508]	440	! ! Outputs
[216]	441	CALL dia_wri ( kstp, indic ) ! ocean model: outputs
[75]	442	ENDIF
[3]	443
[75]	444	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	445	! Coupled mode
	446	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[3]	447
[75]	448	IF( lk_cpl ) CALL cpl_stp( kstp ) ! coupled mode : field exchanges
[508]	449	!
[3]	450	END SUBROUTINE stp
	451
	452	!!======================================================================
	453	END MODULE step

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