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step.F90 in branches/2012/dev_r3327_MERCATOR1_BDY/NEMOGCM/NEMO/OPA_SRC – NEMO

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source: branches/2012/dev_r3327_MERCATOR1_BDY/NEMOGCM/NEMO/OPA_SRC/step.F90 @ 3490

Last change on this file since 3490 was 3490, checked in by cbricaud, 12 years ago
add Jerome Chanut 's modications for BDY, Mercator_1 2012 task
Property svn:keywords set to `Id`
File size: 16.1 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
[3]	26	!!----------------------------------------------------------------------
[888]	27
	28	!!----------------------------------------------------------------------
[2528]	29	!! stp : OPA system time-stepping
[3]	30	!!----------------------------------------------------------------------
[2528]	31	USE step_oce ! time stepping definition modules
[1594]	32	#if defined key_top
[2528]	33	USE trcstp ! passive tracer time-stepping (trc_stp routine)
[1594]	34	#endif
[392]	35	#if defined key_agrif
[389]	36	USE agrif_opa_sponge ! Momemtum and tracers sponges
	37	#endif
	38
[3]	39	IMPLICIT NONE
	40	PRIVATE
	41
[2528]	42	PUBLIC stp ! called by opa.F90
[3]	43
	44	!! * Substitutions
	45	# include "domzgr_substitute.h90"
	46	# include "zdfddm_substitute.h90"
	47	!!----------------------------------------------------------------------
[2528]	48	!! NEMO/OPA 3.3 , NEMO Consortium (2010)
[888]	49	!! $Id$
[2528]	50	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
[3]	51	!!----------------------------------------------------------------------
	52	CONTAINS
	53
[508]	54	#if defined key_agrif
	55	SUBROUTINE stp( )
[1438]	56	INTEGER :: kstp ! ocean time-step index
[508]	57	#else
[467]	58	SUBROUTINE stp( kstp )
[1438]	59	INTEGER, INTENT(in) :: kstp ! ocean time-step index
[467]	60	#endif
	61	!!----------------------------------------------------------------------
[3]	62	!! * ROUTINE stp *
	63	!!
	64	!! ** Purpose : - Time stepping of OPA (momentum and active tracer eqs.)
	65	!! - Time stepping of LIM (dynamic and thermodynamic eqs.)
	66	!! - Tme stepping of TRC (passive tracer eqs.)
	67	!!
	68	!! ** Method : -1- Update forcings and data
	69	!! -2- Update ocean physics
	70	!! -3- Compute the t and s trends
	71	!! -4- Update t and s
	72	!! -5- Compute the momentum trends
	73	!! -6- Update the horizontal velocity
	74	!! -7- Compute the diagnostics variables (rd,N2, div,cur,w)
	75	!! -8- Outputs and diagnostics
	76	!!----------------------------------------------------------------------
[888]	77	INTEGER :: jk ! dummy loop indice
[3]	78	INTEGER :: indic ! error indicator if < 0
	79	!! ---------------------------------------------------------------------
	80
[392]	81	#if defined key_agrif
[389]	82	kstp = nit000 + Agrif_Nb_Step()
[2715]	83	! IF ( Agrif_Root() .and. lwp) Write(,) '---'
	84	! IF (lwp) Write(,) 'Grid Number',Agrif_Fixed(),' time step ',kstp
[1793]	85	# if defined key_iomput
[2528]	86	IF( Agrif_Nbstepint() == 0 ) CALL iom_swap
[1793]	87	# endif
[389]	88	#endif
[2528]	89	indic = 0 ! reset to no error condition
[1725]	90	IF( kstp /= nit000 ) CALL day( kstp ) ! Calendar (day was already called at nit000 in day_init)
[2528]	91	CALL iom_setkt( kstp ) ! say to iom that we are at time step kstp
[3]	92
	93	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[888]	94	! Update data, open boundaries, surface boundary condition (including sea-ice)
[3]	95	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[888]	96	CALL sbc ( kstp ) ! Sea Boundary Condition (including sea-ice)
[3490]	97	IF( lk_tide.AND.(kstp /= nit000 )) CALL tide_init ( kstp )
[3294]	98	IF( lk_tide ) CALL sbc_tide( kstp )
[35]	99	IF( lk_obc ) CALL obc_dta( kstp ) ! update dynamic and tracer data at open boundaries
[3]	100	IF( lk_obc ) CALL obc_rad( kstp ) ! compute phase velocities at open boundaries
[3294]	101	IF( lk_bdy ) CALL bdy_dta( kstp, time_offset=+1 ) ! update dynamic and tracer data at open boundaries
[911]	102
[1438]	103	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[1492]	104	! Ocean dynamics : ssh, wn, hdiv, rot !
[1438]	105	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[1492]	106	CALL ssh_wzv( kstp ) ! after ssh & vertical velocity
[3]	107
	108	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[3294]	109	! Ocean physics update (ua, va, tsa used as workspace)
[3]	110	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[2528]	111	CALL bn2( tsb, rn2b ) ! before Brunt-Vaisala frequency
	112	CALL bn2( tsn, rn2 ) ! now Brunt-Vaisala frequency
[1492]	113	!
	114	! VERTICAL PHYSICS
[1662]	115	CALL zdf_bfr( kstp ) ! bottom friction
[2528]	116
[1492]	117	! ! Vertical eddy viscosity and diffusivity coefficients
[2528]	118	IF( lk_zdfric ) CALL zdf_ric( kstp ) ! Richardson number dependent Kz
	119	IF( lk_zdftke ) CALL zdf_tke( kstp ) ! TKE closure scheme for Kz
	120	IF( lk_zdfgls ) CALL zdf_gls( kstp ) ! GLS closure scheme for Kz
	121	IF( lk_zdfkpp ) CALL zdf_kpp( kstp ) ! KPP closure scheme for Kz
	122	IF( lk_zdfcst ) THEN ! Constant Kz (reset avt, avm[uv] to the background value)
[1537]	123	avt (:,:,:) = rn_avt0 * tmask(:,:,:)
	124	avmu(:,:,:) = rn_avm0 * umask(:,:,:)
	125	avmv(:,:,:) = rn_avm0 * vmask(:,:,:)
[677]	126	ENDIF
[1492]	127	IF( ln_rnf_mouth ) THEN ! increase diffusivity at rivers mouths
[1246]	128	DO jk = 2, nkrnf ; avt(:,:,jk) = avt(:,:,jk) + 2.e0 * rn_avt_rnf * rnfmsk(:,:) * tmask(:,:,jk) ; END DO
[3]	129	ENDIF
[1492]	130	IF( ln_zdfevd ) CALL zdf_evd( kstp ) ! enhanced vertical eddy diffusivity
[3]	131
[1492]	132	IF( lk_zdftmx ) CALL zdf_tmx( kstp ) ! tidal vertical mixing
[3]	133
[888]	134	IF( lk_zdfddm .AND. .NOT. lk_zdfkpp ) &
[1492]	135	& CALL zdf_ddm( kstp ) ! double diffusive mixing
[2528]	136
[1492]	137	CALL zdf_mxl( kstp ) ! mixed layer depth
[3]	138
[2528]	139	! write TKE or GLS information in the restart file
[1531]	140	IF( lrst_oce .AND. lk_zdftke ) CALL tke_rst( kstp, 'WRITE' )
[2528]	141	IF( lrst_oce .AND. lk_zdfgls ) CALL gls_rst( kstp, 'WRITE' )
[1492]	142	!
	143	! LATERAL PHYSICS
	144	!
	145	IF( lk_ldfslp ) THEN ! slope of lateral mixing
[2528]	146	CALL eos( tsb, rhd ) ! before in situ density
	147	IF( ln_zps ) CALL zps_hde( kstp, jpts, tsb, gtsu, gtsv, & ! Partial steps: before horizontal gradient
	148	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
	149	IF( ln_traldf_grif ) THEN ! before slope for Griffies operator
	150	CALL ldf_slp_grif( kstp )
	151	ELSE
	152	CALL ldf_slp( kstp, rhd, rn2b ) ! before slope for Madec operator
	153	ENDIF
[1481]	154	ENDIF
[3]	155	#if defined key_traldf_c2d
[1492]	156	IF( lk_traldf_eiv ) CALL ldf_eiv( kstp ) ! eddy induced velocity coefficient
[2528]	157	#endif
[3]	158
[1482]	159	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[3294]	160	! diagnostics and outputs (ua, va, tsa used as workspace)
[1482]	161	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[1492]	162	IF( lk_floats ) CALL flo_stp( kstp ) ! drifting Floats
	163	IF( lk_diahth ) CALL dia_hth( kstp ) ! Thermocline depth (20 degres isotherm depth)
	164	IF( lk_diafwb ) CALL dia_fwb( kstp ) ! Fresh water budget diagnostics
	165	IF( ln_diaptr ) CALL dia_ptr( kstp ) ! Poleward TRansports diagnostics
[3294]	166	IF( lk_diadct ) CALL dia_dct( kstp ) ! Transports
[1756]	167	IF( lk_diaar5 ) CALL dia_ar5( kstp ) ! ar5 diag
[3294]	168	IF( lk_diaharm ) CALL dia_harm( kstp ) ! Tidal harmonic analysis
[1635]	169	CALL dia_wri( kstp ) ! ocean model: outputs
[1482]	170
[923]	171	#if defined key_top
[3]	172	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	173	! Passive Tracer Model
	174	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[1492]	175	CALL trc_stp( kstp ) ! time-stepping
[3]	176	#endif
	177
	178	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[1492]	179	! Active tracers (ua, va used as workspace)
[3]	180	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[2528]	181	tsa(:,:,:,:) = 0.e0 ! set tracer trends to zero
[3]	182
[2528]	183	IF( ln_asmiau .AND. &
	184	& ln_trainc ) CALL tra_asm_inc( kstp ) ! apply tracer assimilation increment
[467]	185	CALL tra_sbc ( kstp ) ! surface boundary condition
	186	IF( ln_traqsr ) CALL tra_qsr ( kstp ) ! penetrative solar radiation qsr
[2528]	187	IF( ln_trabbc ) CALL tra_bbc ( kstp ) ! bottom heat flux
	188	IF( lk_trabbl ) CALL tra_bbl ( kstp ) ! advective (and/or diffusive) bottom boundary layer scheme
[3294]	189	IF( ln_tradmp ) CALL tra_dmp ( kstp ) ! internal damping trends
[3490]	190	IF( lk_bdy ) CALL bdy_tra_dmp( kstp ) ! bdy damping trends
[467]	191	CALL tra_adv ( kstp ) ! horizontal & vertical advection
[2528]	192	IF( lk_zdfkpp ) CALL tra_kpp ( kstp ) ! KPP non-local tracer fluxes
[467]	193	CALL tra_ldf ( kstp ) ! lateral mixing
[392]	194	#if defined key_agrif
[782]	195	IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_tra ! tracers sponge
[389]	196	#endif
[1111]	197	CALL tra_zdf ( kstp ) ! vertical mixing and after tracer fields
[1239]	198
[1492]	199	IF( ln_dynhpg_imp ) THEN ! semi-implicit hpg (time stepping then eos)
[2528]	200	IF( ln_zdfnpc ) CALL tra_npc( kstp ) ! update after fields by non-penetrative convection
	201	CALL tra_nxt( kstp ) ! tracer fields at next time step
	202	CALL eos ( tsa, rhd, rhop ) ! Time-filtered in situ density for hpg computation
	203	IF( ln_zps ) CALL zps_hde( kstp, jpts, tsa, gtsu, gtsv, & ! zps: time filtered hor. derivative
	204	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
[1492]	205
	206	ELSE ! centered hpg (eos then time stepping)
[2528]	207	CALL eos ( tsn, rhd, rhop ) ! now in situ density for hpg computation
	208	IF( ln_zps ) CALL zps_hde( kstp, jpts, tsn, gtsu, gtsv, & ! zps: now hor. derivative
	209	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
	210	IF( ln_zdfnpc ) CALL tra_npc( kstp ) ! update after fields by non-penetrative convection
	211	CALL tra_nxt( kstp ) ! tracer fields at next time step
[1239]	212	ENDIF
[1481]	213
[3]	214	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[3294]	215	! Dynamics (tsa used as workspace)
[3]	216	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[1492]	217	ua(:,:,:) = 0.e0 ! set dynamics trends to zero
[75]	218	va(:,:,:) = 0.e0
[3]	219
[2528]	220	IF( ln_asmiau .AND. &
	221	& ln_dyninc ) CALL dyn_asm_inc( kstp ) ! apply dynamics assimilation increment
[3294]	222	IF( ln_neptsimp ) CALL dyn_nept_cor( kstp ) ! subtract Neptune velocities (simplified)
[3490]	223	IF( lk_bdy ) CALL bdy_dyn3d_dmp(kstp ) ! bdy damping trends
[1492]	224	CALL dyn_adv( kstp ) ! advection (vector or flux form)
	225	CALL dyn_vor( kstp ) ! vorticity term including Coriolis
	226	CALL dyn_ldf( kstp ) ! lateral mixing
[3294]	227	IF( ln_neptsimp ) CALL dyn_nept_cor( kstp ) ! add Neptune velocities (simplified)
[392]	228	#if defined key_agrif
[1492]	229	IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_dyn ! momemtum sponge
[389]	230	#endif
[1492]	231	CALL dyn_hpg( kstp ) ! horizontal gradient of Hydrostatic pressure
[2528]	232	CALL dyn_bfr( kstp ) ! bottom friction
[1492]	233	CALL dyn_zdf( kstp ) ! vertical diffusion
	234	CALL dyn_spg( kstp, indic ) ! surface pressure gradient
	235	CALL dyn_nxt( kstp ) ! lateral velocity at next time step
[3]	236
[1492]	237	CALL ssh_nxt( kstp ) ! sea surface height at next time step
[593]	238
[2528]	239	IF( ln_diahsb ) CALL dia_hsb( kstp ) ! - ML - global conservation diagnostics
	240	IF( lk_diaobs ) CALL dia_obs( kstp ) ! obs-minus-model (assimilation) diagnostics (call after dynamics update)
	241
[3]	242	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[888]	243	! Control and restarts
[3]	244	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[1492]	245	CALL stp_ctl( kstp, indic )
	246	IF( indic < 0 ) THEN
	247	CALL ctl_stop( 'step: indic < 0' )
	248	CALL dia_wri_state( 'output.abort', kstp )
[1482]	249	ENDIF
[1492]	250	IF( kstp == nit000 ) CALL iom_close( numror ) ! close input ocean restart file
	251	IF( lrst_oce ) CALL rst_write ( kstp ) ! write output ocean restart file
	252	IF( lk_obc ) CALL obc_rst_write( kstp ) ! write open boundary restart file
[3]	253
[508]	254	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[3294]	255	! Trends (ua, va, tsa used as workspace)
[508]	256	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[1492]	257	IF( nstop == 0 ) THEN
	258	IF( lk_trddyn ) CALL trd_dwr( kstp ) ! trends: dynamics
	259	IF( lk_trdtra ) CALL trd_twr( kstp ) ! trends: active tracers
	260	IF( lk_trdmld ) CALL trd_mld( kstp ) ! trends: Mixed-layer
	261	IF( lk_trdvor ) CALL trd_vor( kstp ) ! trends: vorticity budget
[75]	262	ENDIF
[3]	263
[75]	264	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	265	! Coupled mode
	266	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
[1492]	267	IF( lk_cpl ) CALL sbc_cpl_snd( kstp ) ! coupled mode : field exchanges
[508]	268	!
[3294]	269	IF( nn_timing == 1 .AND. kstp == nit000 ) CALL timing_reset
[1481]	270	!
[3]	271	END SUBROUTINE stp
	272
	273	!!======================================================================
	274	END MODULE step

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