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step.F90 in trunk/NEMO/OPA_SRC – NEMO

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source: trunk/NEMO/OPA_SRC/step.F90 @ 389

Last change on this file since 389 was 389, checked in by opalod, 18 years ago

RB:nemo_v1_update_038: first integration of Agrif :

configuration parameters are just integer when agrif is used
add call to agrif routines with key_agrif

Property svn:eol-style set to native
Property svn:keywords set to Author Date Id Revision

File size: 25.7 KB

Rev	Line
[3]	1	MODULE step
	2	!!======================================================================
	3	!! * MODULE step *
	4	!! Time-stepping : manager of the ocean, tracer and ice time stepping
	5	!!======================================================================
	6
	7	!!----------------------------------------------------------------------
	8	!! stp : OPA system time-stepping
	9	!!----------------------------------------------------------------------
	10	!! * Modules used
	11	USE oce ! ocean dynamics and tracers variables
	12	USE dom_oce ! ocean space and time domain variables
	13	USE zdf_oce ! ocean vertical physics variables
	14	USE ldftra_oce
	15	USE ldfdyn_oce
[216]	16	USE cpl_oce ! coupled ocean-atmosphere variables
[3]	17	USE in_out_manager ! I/O manager
	18	USE lbclnk
	19
	20	USE daymod ! calendar (day routine)
	21
	22	USE dtatem ! ocean temperature data (dta_tem routine)
	23	USE dtasal ! ocean salinity data (dta_sal routine)
[294]	24	USE dtasst ! ocean sea surface temperature (dta_sst routine)
[3]	25	USE taumod ! surface stress (tau routine)
	26	USE flxmod ! thermohaline fluxes (flx routine)
	27	USE ocesbc ! thermohaline fluxes (oce_sbc routine)
	28	USE flxrnf ! runoffs (flx_rnf routine)
	29	USE flxfwb ! freshwater budget correction (flx_fwb routine)
	30	USE closea ! closed sea freshwater budget (flx_clo routine)
	31	USE ocfzpt ! surface ocean freezing point (oc_fz_pt routine)
	32
[187]	33	USE trcstp ! passive tracer time-stepping (trc_stp routine)
[3]	34
	35	USE dynhpg ! hydrostatic pressure grad. (dyn_hpg routine)
	36	USE dynhpg_atsk ! hydrostatic pressure grad. (dyn_hpg_atsk routine)
[367]	37	USE dynspg_oce ! surface pressure gradient (dyn_spg routine)
[359]	38	USE dynspg ! surface pressure gradient (dyn_spg routine)
[3]	39	USE dynkeg ! kinetic energy gradient (dyn_keg routine)
[75]	40	USE dynvor ! vorticity term (dyn_vor_... routines)
[3]	41	USE dynzad ! vertical advection (dyn_adv routine)
	42	USE dynldf_bilapg ! lateral mixing (dyn_ldf_bilapg routine)
	43	USE dynldf_bilap ! lateral mixing (dyn_ldf_bilap routine)
	44	USE dynldf_iso ! lateral mixing (dyn_ldf_iso routine)
	45	USE dynldf_lap ! lateral mixing (dyn_ldf_lap routine)
	46	USE dynzdf_imp ! vertical diffusion: implicit (dyn_zdf routine)
	47	USE dynzdf_imp_atsk ! vertical diffusion: implicit (dyn_zdf routine)
	48	USE dynzdf_iso ! vertical diffusion: isopycnal (dyn_zdf routine)
	49	USE dynzdf_exp ! vertical diffusion: explicit (dyn_zdf_exp routine)
	50	USE dynnxt ! time-stepping (dyn_nxt routine)
	51
	52	USE trabbc ! bottom boundary condition (tra_bbc routine)
	53	USE trabbl ! bottom boundary layer (tra_bbl routine)
	54	USE tradmp ! internal damping (tra_dmp routine)
	55	USE traldf_bilapg ! lateral mixing (tra_ldf_bilapg routine)
	56	USE traldf_bilap ! lateral mixing (tra_ldf_bilap routine)
	57	USE traldf_iso ! lateral mixing (tra_ldf_iso routine)
	58	USE traldf_iso_zps ! lateral mixing (tra_ldf_iso_zps routine)
	59	USE traldf_lap ! lateral mixing (tra_ldf_lap routine)
	60	USE traqsr ! solar radiation penetration (tra_qsr routine)
	61	USE tranpc ! non-penetrative convection (tra_npc routine)
	62	USE tranxt ! time-stepping (tra_nxt routine)
	63	USE traadv_ctl ! advection scheme control (tra_adv_ctl routine)
	64	USE traadv_cen2 ! 2nd order centered scheme (tra_adv_cen2 routine)
	65	USE traadv_tvd ! TVD scheme (tra_adv_tvd routine)
	66	USE traadv_muscl ! MUSCL scheme (tra_adv_muscl routine)
	67	USE traadv_muscl2 ! MUSCL2 scheme (tra_adv_muscl2 routine)
	68	USE cla ! cross land advection (tra_cla routine)
	69	USE trazdf_exp ! vertical diffusion: explicit (tra_zdf_exp routine)
	70	USE trazdf_imp ! vertical diffusion: implicit (tra_zdf_imp routine)
	71	USE trazdf_iso ! vertical diffusion (tra_zdf_exp routine)
	72	USE trazdf_iso_vopt ! vertical diffusion (tra_zdf_exp routine)
	73	USE trasbc ! surface boundary condition (tra_sbc routine)
	74
	75	USE eosbn2 ! equation of state (eos_bn2 routine)
	76
	77	USE obc_par ! open boundary condition variables
	78	USE obcdta ! open boundary condition data (obc_dta routine)
	79	USE obcrst ! open boundary cond. restart (obc_rst routine)
	80	USE obcrad ! open boundary cond. radiation (obc_rad routine)
	81	USE obcspg ! open boundary cond spg (obc_spg routine)
	82
	83	USE divcur ! hor. divergence and curl (div & cur routines)
	84	USE cla_div ! cross land: hor. divergence (div_cla routine)
	85	USE wzvmod ! vertical velocity (wzv routine)
	86
	87	USE ldfslp ! iso-neutral slopes (ldf_slp routine)
	88	USE ldfeiv ! eddy induced velocity coef. (ldf_eiv routine)
	89
	90	USE zdfbfr ! bottom friction (zdf_bfr routine)
	91	USE zdftke ! TKE vertical mixing (zdf_tke routine)
[255]	92	USE zdfkpp ! KPP vertical mixing (zdf_kpp routine)
[3]	93	USE zdfddm ! double diffusion mixing (zdf_ddm routine)
	94	USE zdfevd ! enhanced vertical diffusion (zdf_evd routine)
	95	USE zdfric ! Richardson vertical mixing (zdf_ric routine)
	96	USE zdfmxl ! Mixed-layer depth (zdf_mxl routine)
	97
	98	USE zpshde ! partial step: hor. derivative (zps_hde routine)
	99	USE ice_oce ! sea-ice variable
	100	USE icestp ! sea-ice time-stepping (ice_stp routine)
	101
	102	USE diawri ! Standard run outputs (dia_wri routine)
[216]	103	USE trdicp ! Ocean momentum/tracers trends (trd_wri routine)
[3]	104	USE trdmld ! mixed-layer trends (trd_mld routine)
[108]	105	USE trdvor ! vorticity budget (trd_vor routine)
[216]	106	USE diagap ! hor. mean model-data gap (dia_gap routine)
[3]	107	USE diahdy ! dynamic height (dia_hdy routine)
[132]	108	USE diaptr ! poleward transports (dia_ptr routine)
[3]	109	USE diahth ! thermocline depth (dia_hth routine)
	110	USE diafwb ! freshwater budget (dia_fwb routine)
	111	USE diaspr ! suface pressure (rigid-lid) (dia_spr routine)
	112	USE flo_oce ! floats variables
	113	USE floats ! floats computation (flo_stp routine)
	114
	115	USE stpctl ! time stepping control (stp_ctl routine)
[75]	116	USE restart ! ocean restart (rst_wri routine)
	117	USE cpl ! exchanges in coupled mode (cpl_stp routine)
[258]	118	USE prtctl ! Print control (prt_ctl routine)
[3]	119
[389]	120	#if defined key_AGRIF
	121	USE agrif_opa_sponge ! Momemtum and tracers sponges
	122	#endif
	123
[3]	124	IMPLICIT NONE
	125	PRIVATE
	126
	127	!! * Routine accessibility
	128	PUBLIC stp ! called by opa.F90
	129
	130	!! * Substitutions
	131	# include "domzgr_substitute.h90"
	132	# include "zdfddm_substitute.h90"
	133	!!----------------------------------------------------------------------
[247]	134	!! OPA 9.0 , LOCEAN-IPSL (2005)
	135	!! $Header$
	136	!! This software is governed by the CeCILL licence see modipsl/doc/NEMO_CeCILL.txt
[3]	137	!!----------------------------------------------------------------------
	138
	139	CONTAINS
	140
[389]	141	SUBROUTINE stp( &
	142	#if !defined key_AGRIF
	143	kstp &
	144	#endif
	145	) !!----------------------------------------------------------------------
[3]	146	!! * ROUTINE stp *
	147	!!
	148	!! ** Purpose : - Time stepping of OPA (momentum and active tracer eqs.)
	149	!! - Time stepping of LIM (dynamic and thermodynamic eqs.)
	150	!! - Tme stepping of TRC (passive tracer eqs.)
	151	!!
	152	!! ** Method : -1- Update forcings and data
	153	!! -2- Update ocean physics
	154	!! -3- Compute the t and s trends
	155	!! -4- Update t and s
	156	!! -5- Compute the momentum trends
	157	!! -6- Update the horizontal velocity
	158	!! -7- Compute the diagnostics variables (rd,N2, div,cur,w)
	159	!! -8- Outputs and diagnostics
	160	!!
	161	!! History :
	162	!! ! 91-03 () Original code
	163	!! ! 91-11 (G. Madec)
	164	!! ! 92-06 (M. Imbard) add a first output record
	165	!! ! 96-04 (G. Madec) introduction of dynspg
	166	!! ! 96-04 (M.A. Foujols) introduction of passive tracer
	167	!! 8.0 ! 97-06 (G. Madec) new architecture of call
	168	!! 8.2 ! 97-06 (G. Madec, M. Imbard, G. Roullet) free surface
	169	!! 8.2 ! 99-02 (G. Madec, N. Grima) hpg implicit
	170	!! 8.2 ! 00-07 (J-M Molines, M. Imbard) Open Bondary Conditions
	171	!! 9.0 ! 02-06 (G. Madec) free form, suppress macro-tasking
[216]	172	!! " ! 04-08 (C. Talandier) New trends organization
[255]	173	!! " ! 05-01 (C. Ethe) Add the KPP closure scheme
[3]	174	!!----------------------------------------------------------------------
	175	!! * Arguments
[389]	176	INTEGER &
	177	#if !defined key_AGRIF
	178	, INTENT( in ) &
	179	#endif
	180	:: kstp ! ocean time-step index
[3]	181
	182	!! * local declarations
	183	INTEGER :: indic ! error indicator if < 0
	184	!! ---------------------------------------------------------------------
	185
[389]	186	#if defined key_AGRIF
	187	kstp = nit000 + Agrif_Nb_Step()
	188	IF ( Agrif_Root() .and. lwp) Write(,) '---'
	189	IF (lwp) Write(,) 'Grid N°',Agrif_Fixed(),' time step ',kstp
	190	#endif
[3]	191	indic = 1 ! reset to no error condition
	192	adatrj = adatrj + rdt/86400._wp
	193
	194	CALL day( kstp ) ! Calendar
	195
	196	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	197	! Update data, open boundaries and Forcings
	198	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	199
	200	IF( lk_dtatem ) CALL dta_tem( kstp ) ! update 3D temperature data
	201
	202	IF( lk_dtasal ) CALL dta_sal( kstp ) ! Salinity data
	203
	204	IF( lk_dtasst ) CALL dta_sst( kstp ) ! Sea Surface Temperature data
	205
[35]	206	IF( lk_obc ) CALL obc_dta( kstp ) ! update dynamic and tracer data at open boundaries
[3]	207
	208	IF( lk_obc ) CALL obc_rad( kstp ) ! compute phase velocities at open boundaries
	209
	210	CALL tau( kstp ) ! wind stress
	211
	212	CALL flx_rnf( kstp ) ! runoff data
	213
	214	CALL flx( kstp ) ! heat and freshwater fluxes
	215
	216	IF( lk_ice_lim ) CALL ice_stp( kstp ) ! sea-ice model (Update stress & fluxes)
	217
	218	CALL oce_sbc( kstp ) ! ocean surface boudaries
	219
	220	IF( ln_fwb ) CALL flx_fwb( kstp ) ! freshwater budget
	221
	222	IF( nclosea == 1 ) CALL flx_clo( kstp ) ! closed sea in the domain (update freshwater fluxes)
	223
	224	IF( kstp == nit000 ) THEN
	225	IF( ninist == 1 ) THEN ! Output the initial state and forcings
	226	CALL dia_wri_state( 'output.init' )
	227	ENDIF
	228	ENDIF
	229
[258]	230	IF(ln_ctl) THEN ! print mean trends (used for debugging)
	231	CALL prt_ctl(tab2d_1=emp , clinfo1=' emp - : ', mask1=tmask, ovlap=1)
	232	CALL prt_ctl(tab2d_1=emps , clinfo1=' emps - : ', mask1=tmask, ovlap=1)
	233	CALL prt_ctl(tab2d_1=qt , clinfo1=' qt - : ', mask1=tmask, ovlap=1)
	234	CALL prt_ctl(tab2d_1=qsr , clinfo1=' qsr - : ', mask1=tmask, ovlap=1)
	235	CALL prt_ctl(tab2d_1=runoff , clinfo1=' runoff : ', mask1=tmask, ovlap=1)
	236	CALL prt_ctl(tab3d_1=tmask , clinfo1=' tmask : ', mask1=tmask, ovlap=1, kdim=jpk)
	237	CALL prt_ctl(tab3d_1=tn , clinfo1=' sst - : ', mask1=tmask, ovlap=1, kdim=1)
	238	CALL prt_ctl(tab3d_1=sn , clinfo1=' sss - : ', mask1=tmask, ovlap=1, kdim=1)
	239	CALL prt_ctl(tab2d_1=taux , clinfo1=' tau - x : ', tab2d_2=tauy, clinfo2=' - y : ', ovlap=1)
[3]	240	ENDIF
	241
	242
	243	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	244	! Ocean physics update
	245	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	246	!-----------------------------------------------------------------------
	247	! VERTICAL PHYSICS
	248	!-----------------------------------------------------------------------
	249	! N.B. ua, va, ta, sa arrays are used as workspace in this section
	250	!-----------------------------------------------------------------------
	251
	252	CALL bn2( tb, sb, rn2 ) ! before Brunt-Vaisala frequency
	253
	254	! ! Vertical eddy viscosity and diffusivity coefficients
	255	IF( lk_zdfric ) CALL zdf_ric( kstp ) ! Richardson number dependent Kz
	256	IF( lk_zdftke ) CALL zdf_tke( kstp ) ! TKE closure scheme for Kz
[255]	257	IF( lk_zdfkpp ) CALL zdf_kpp( kstp ) ! KPP closure scheme for Kz
[3]	258	IF( lk_zdfcst ) avt (:,:,:) = avt0 * tmask(:,:,:) ! Constant Kz (reset avt to the background value)
	259
[236]	260	IF( cp_cfg == "orca" ) THEN ! ORCA: Reduce vertical mixing in some specific areas
[3]	261	SELECT CASE ( jp_cfg )
	262	CASE ( 05 ) ! ORCA R2 configuration
	263	avt (:,:,2) = avt (:,:,2) + 1.e-3 * upsrnfh(:,:) ! increase diffusivity of rivers mouths
	264	END SELECT
	265	ENDIF
	266
	267	IF( ln_zdfevd ) CALL zdf_evd( kstp ) ! enhanced vertical eddy diffusivity
	268
[255]	269	IF( lk_zdfddm .AND. .NOT. lk_zdfkpp) &
	270	& CALL zdf_ddm( kstp ) ! double diffusive mixing
[3]	271
[75]	272	CALL zdf_bfr( kstp ) ! bottom friction
[3]	273
	274	CALL zdf_mxl( kstp ) ! mixed layer depth
	275
	276
	277	!-----------------------------------------------------------------------
	278	! LATERAL PHYSICS
	279	!-----------------------------------------------------------------------
	280	! N.B. ua, va, ta, sa arrays are used as workspace in this section
	281	!-----------------------------------------------------------------------
	282
	283	IF( lk_ldfslp ) CALL ldf_slp( kstp, rhd, rn2 ) ! before slope of the lateral mixing
	284
	285	#if defined key_traldf_c2d
	286	IF( lk_traldf_eiv ) CALL ldf_eiv( kstp ) ! eddy induced velocity coefficient
	287	#endif
	288
	289
	290	#if defined key_passivetrc
	291	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	292	! Passive Tracer Model
	293	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	294	! N.B. ua, va, ta, sa arrays are used as workspace in this section
	295	!-----------------------------------------------------------------------
	296
[345]	297	CALL trc_stp( kstp, indic ) ! time-stepping
[3]	298
	299	#endif
	300
	301
	302	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	303	! Active tracers
	304	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	305	! N.B. ua, va arrays are used as workspace in this section
	306	!-----------------------------------------------------------------------
	307
[75]	308	ta(:,:,:) = 0.e0 ! set tracer trends to zero
	309	sa(:,:,:) = 0.e0
[3]	310
[75]	311	CALL tra_sbc( kstp ) ! surface boundary condition
[3]	312
	313	IF( ln_traqsr ) CALL tra_qsr( kstp ) ! penetrative solar radiation qsr
	314
	315	IF( lk_trabbc ) CALL tra_bbc( kstp ) ! bottom heat flux
	316
	317	IF( lk_trabbl_dif ) CALL tra_bbl_dif( kstp ) ! diffusive bottom boundary layer scheme
	318	IF( lk_trabbl_adv ) CALL tra_bbl_adv( kstp ) ! advective (and/or diffusive) bottom boundary layer scheme
	319
[75]	320	IF( lk_tradmp ) CALL tra_dmp( kstp ) ! internal damping trends
[3]	321
[75]	322	! ! horizontal & vertical advection
[3]	323	IF( kstp == nit000 ) CALL tra_adv_ctl ! chose/control the scheme used
	324	IF( ln_traadv_cen2 ) CALL tra_adv_cen2 ( kstp ) ! 2nd order centered scheme
	325	IF( ln_traadv_tvd ) CALL tra_adv_tvd ( kstp ) ! TVD scheme
	326	IF( ln_traadv_muscl ) CALL tra_adv_muscl ( kstp ) ! MUSCL scheme
	327	IF( ln_traadv_muscl2 ) CALL tra_adv_muscl2( kstp ) ! MUSCL2 scheme
	328
[75]	329	IF( n_cla == 1 ) CALL tra_cla( kstp ) ! Cross Land Advection (Update Hor. advection)
[3]	330
[75]	331	! ! lateral mixing
	332	IF( l_traldf_lap ) CALL tra_ldf_lap ( kstp ) ! iso-level laplacian
	333	IF( l_traldf_bilap ) CALL tra_ldf_bilap ( kstp ) ! iso-level bilaplacian
	334	IF( l_traldf_bilapg ) CALL tra_ldf_bilapg ( kstp ) ! s-coord. horizontal bilaplacian
	335	IF( l_traldf_iso ) CALL tra_ldf_iso ( kstp ) ! iso-neutral/geopot. laplacian
	336	IF( l_traldf_iso_zps ) CALL tra_ldf_iso_zps( kstp ) ! partial step iso-neutral/geopot. laplacian
[3]	337
[389]	338	#if defined key_AGRIF
	339	IF (.NOT. Agrif_Root()) CALL Agrif_Sponge_tra( kstp ) ! tracers sponge
	340	#endif
[75]	341	! ! vertical diffusion
	342	IF( l_trazdf_exp ) CALL tra_zdf_exp ( kstp ) ! explicit time stepping (time splitting scheme)
	343	IF( l_trazdf_imp ) CALL tra_zdf_imp ( kstp ) ! implicit time stepping (euler backward)
	344	IF( l_trazdf_iso ) CALL tra_zdf_iso ( kstp ) ! isopycnal
	345	IF( l_trazdf_iso_vo ) CALL tra_zdf_iso_vopt( kstp ) ! vector opt. isopycnal
[3]	346
[75]	347	CALL tra_nxt( kstp ) ! tracer fields at next time step
[3]	348
[75]	349	IF( ln_zdfnpc ) CALL tra_npc( kstp ) ! update the new (t,s) fields by non
	350	! ! penetrative convective adjustment
[3]	351
[75]	352	IF( ln_dynhpg_imp ) THEN ! semi-implicit hpg
	353	CALL eos( ta, sa, rhd, rhop ) ! Time-filtered in situ density used in dynhpg module
	354	IF( lk_zps ) CALL zps_hde( kstp, ta, sa, rhd, & ! Partial steps: time filtered hor. gradient
	355	& gtu, gsu, gru, & ! of t, s, rd at the bottom ocean level
	356	& gtv, gsv, grv )
	357	ELSE ! centered hpg (default case)
[3]	358	CALL eos( tb, sb, rhd, rhop ) ! now (swap=before) in situ density for dynhpg module
	359	IF( lk_zps ) CALL zps_hde( kstp, tb, sb, rhd, & ! Partial steps: now horizontal gradient
	360	& gtu, gsu, gru, & ! of t, s, rd at the bottom ocean level
	361	& gtv, gsv, grv )
	362	ENDIF
	363
	364	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	365	! Dynamics
	366	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	367	! N.B. ta, sa arrays are used as workspace in this section
	368	!-----------------------------------------------------------------------
	369
[75]	370	ua(:,:,:) = 0.e0 ! set dynamics trends to zero
	371	va(:,:,:) = 0.e0
[3]	372
[389]	373	CALL dyn_keg( kstp ) ! horizontal gradient of kinetic energy
[3]	374
[75]	375	! ! vorticity term including Coriolis
	376	IF( kstp == nit000 ) CALL dyn_vor_ctl ! chose/control the scheme used
[3]	377	IF( ln_dynvor_ens ) CALL dyn_vor_enstrophy( kstp ) ! enstrophy conserving scheme
	378	IF( ln_dynvor_ene ) CALL dyn_vor_energy ( kstp ) ! energy conserving scheme
[35]	379	IF( ln_dynvor_mix ) CALL dyn_vor_mixed ( kstp ) ! mixed energy/enstrophy conserving scheme
[108]	380	IF( ln_dynvor_een ) CALL dyn_vor_ene_ens ( kstp ) ! combined energy/enstrophy conserving scheme
[389]	381
[75]	382	! ! lateral mixing
[3]	383	IF( l_dynldf_lap ) CALL dyn_ldf_lap ( kstp ) ! iso-level laplacian
	384	IF( l_dynldf_bilap ) CALL dyn_ldf_bilap ( kstp ) ! iso-level bilaplacian
	385	IF( l_dynldf_bilapg ) CALL dyn_ldf_bilapg ( kstp ) ! s-coord. horizontal bilaplacian
	386	IF( l_dynldf_iso ) CALL dyn_ldf_iso ( kstp ) ! iso-neutral laplacian
	387
[389]	388	#if defined key_AGRIF
	389	IF (.NOT. Agrif_Root()) CALL Agrif_Sponge_dyn( kstp ) ! momemtum sponge
	390	#endif
[75]	391	! ! horizontal gradient of Hydrostatic pressure
[359]	392	IF ( lk_jki ) THEN
	393	CALL dyn_hpg_atsk( kstp ) ! autotask case (j-k-i loop)
	394	ELSE
	395	CALL dyn_hpg ( kstp ) ! default case (k-j-i loop)
	396	ENDIF
[3]	397
[389]	398	CALL dyn_zad ( kstp ) ! vertical advection
[3]	399
[75]	400	! ! vertical diffusion
[216]	401	IF( l_dynzdf_exp ) CALL dyn_zdf_exp ( kstp ) ! explicit time stepping (time splitting scheme)
	402	IF( l_dynzdf_imp ) CALL dyn_zdf_imp ( kstp ) ! implicit time stepping (euler backward)
	403	IF( l_dynzdf_imp_tsk ) CALL dyn_zdf_imp_tsk( kstp ) ! autotask implicit time stepping (euler backward)
	404	IF( l_dynzdf_iso ) CALL dyn_zdf_iso ( kstp ) ! iso-neutral case
[3]	405
	406	IF( lk_dynspg_rl ) THEN
[75]	407	IF( lk_obc ) CALL obc_spg( kstp ) ! surface pressure gradient at open boundaries
[3]	408	ENDIF
	409	indic=0
	410	!i bug lbc sur emp
	411	CALL lbc_lnk( emp, 'T', 1. )
	412	!i
[359]	413	CALL dyn_spg( kstp, indic ) ! surface pressure gradient
[3]	414
[359]	415	CALL dyn_nxt( kstp ) ! velocity at next time step
[3]	416
	417
	418	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	419	! Computation of diagnostic variables
	420	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	421	! N.B. ua, va, ta, sa arrays are used as workspace in this section
	422	!-----------------------------------------------------------------------
	423
	424	CALL oc_fz_pt ! ocean surface freezing temperature
	425
	426	CALL div_cur( kstp ) ! Horizontal divergence & Relative vorticity
	427
	428	IF( n_cla == 1 ) CALL div_cla( kstp ) ! Cross Land Advection (Update Hor. divergence)
	429
	430	CALL wzv( kstp ) ! Vertical velocity
	431
	432
	433
	434	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	435	! Control, diagnostics and outputs
	436	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	437	! N.B. ua, va, ta, sa arrays are used as workspace in this section
	438	!-----------------------------------------------------------------------
	439
[75]	440	! ! Time loop: control and print
[3]	441	CALL stp_ctl( kstp, indic )
[75]	442	IF ( indic < 0 ) nstop = nstop + 1
[3]	443
[75]	444	IF ( nstop == 0 ) THEN
	445	! ! Diagnostics:
	446	IF( lk_floats ) CALL flo_stp( kstp ) ! drifting Floats
[216]	447	IF( lk_trddyn ) CALL trd_dwr( kstp ) ! trends: dynamics
	448	IF( lk_trdtra ) CALL trd_twr( kstp ) ! trends: active tracers
[75]	449	IF( lk_trdmld ) CALL trd_mld( kstp ) ! trends: Mixed-layer
[108]	450	IF( lk_trdvor ) CALL trd_vor( kstp ) ! trends: vorticity budget
[75]	451	IF( lk_diaspr ) CALL dia_spr( kstp ) ! Surface pressure diagnostics
	452	IF( lk_diahth ) CALL dia_hth( kstp ) ! Thermocline depth (20 degres isotherm depth)
	453	IF( lk_diagap ) CALL dia_gap( kstp ) ! basin averaged diagnostics
	454	IF( lk_diahdy ) CALL dia_hdy( kstp ) ! dynamical heigh diagnostics
	455	IF( lk_diafwb ) CALL dia_fwb( kstp ) ! Fresh water budget diagnostics
[132]	456
	457	IF( ln_diaptr .AND. ( kstp == nit000 .OR. MOD( kstp, nf_ptr ) == 0 ) ) &
[75]	458	CALL dia_ptr( kstp ) ! Poleward TRansports diagnostics
[3]	459
[75]	460	! ! save and outputs
[216]	461	CALL rst_write ( kstp ) ! ocean model: restart file output
	462	IF( lk_obc ) CALL obc_rst_wri( kstp ) ! ocean model: open boundary restart file output
	463	CALL dia_wri ( kstp, indic ) ! ocean model: outputs
[3]	464
[75]	465	ENDIF
[3]	466
[75]	467	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	468	! Coupled mode
	469	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[3]	470
[75]	471	IF( lk_cpl ) CALL cpl_stp( kstp ) ! coupled mode : field exchanges
	472
[3]	473	END SUBROUTINE stp
	474
	475	!!======================================================================
	476	END MODULE step

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