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source: trunk/NEMO/OPA_SRC/step.F90 @ 508

Last change on this file since 508 was 508, checked in by opalod, 18 years ago
nemo_v1_update_071:RB: add iom for restart and reorganization of restart
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 23.2 KB

Line
1	MODULE step
2	!!======================================================================
3	!! * MODULE step *
4	!! Time-stepping : manager of the ocean, tracer and ice time stepping
5	!!======================================================================
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
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
28	USE ldftra_oce ! ocean tracer - trends
29	USE ldfdyn_oce ! ocean dynamics - trends
30	USE cpl_oce ! coupled ocean-atmosphere variables
31	USE in_out_manager ! I/O manager
32	USE iom
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)
39	USE dtasst ! ocean sea surface temperature (dta_sst routine)
40	USE dtasss ! ocean sea surface salinity (dta_sss routine)
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
49	USE trcstp ! passive tracer time-stepping (trc_stp routine)
50
51	USE traqsr ! solar radiation penetration (tra_qsr routine)
52	USE trasbc ! surface boundary condition (tra_sbc routine)
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)
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)
62	USE tranpc ! non-penetrative convection (tra_npc routine)
63
64	USE eosbn2 ! equation of state (eos_bn2 routine)
65
66	USE dynhpg ! hydrostatic pressure grad. (dyn_hpg routine)
67	USE dynkeg ! kinetic energy gradient (dyn_keg routine)
68	USE dynvor ! vorticity term (dyn_vor routine)
69	USE dynzad ! vertical advection (dyn_adv routine)
70	USE dynldf ! lateral momentum diffusion (dyn_ldf routine)
71	USE dynzdf ! vertical diffusion (dyn_zdf routine)
72	USE dynspg_oce ! surface pressure gradient (dyn_spg routine)
73	USE dynspg ! surface pressure gradient (dyn_spg routine)
74	USE dynnxt ! time-stepping (dyn_nxt routine)
75
76	USE obc_par ! open boundary condition variables
77	USE obcdta ! open boundary condition data (obc_dta routine)
78	USE obcrst ! open boundary cond. restart (obc_rst routine)
79	USE obcrad ! open boundary cond. radiation (obc_rad routine)
80	USE obcspg ! open boundary cond spg (obc_spg routine)
81
82	USE divcur ! hor. divergence and curl (div & cur routines)
83	USE cla_div ! cross land: hor. divergence (div_cla routine)
84	USE wzvmod ! vertical velocity (wzv routine)
85
86	USE ldfslp ! iso-neutral slopes (ldf_slp routine)
87	USE ldfeiv ! eddy induced velocity coef. (ldf_eiv routine)
88
89	USE zdfbfr ! bottom friction (zdf_bfr routine)
90	USE zdftke ! TKE vertical mixing (zdf_tke routine)
91	USE zdftke_jki ! TKE vertical mixing (zdf_tke routine)
92	USE zdfkpp ! KPP vertical mixing (zdf_kpp routine)
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)
103	USE trdicp ! Ocean momentum/tracers trends (trd_wri routine)
104	USE trdmld ! mixed-layer trends (trd_mld routine)
105	USE trdmld_rst ! restart for mixed-layer trends
106	USE trdmod_oce ! ocean momentum/tracers trends
107	USE trdvor ! vorticity budget (trd_vor routine)
108	USE diagap ! hor. mean model-data gap (dia_gap routine)
109	USE diahdy ! dynamic height (dia_hdy routine)
110	USE diaptr ! poleward transports (dia_ptr routine)
111	USE diahth ! thermocline depth (dia_hth routine)
112	USE diafwb ! freshwater budget (dia_fwb routine)
113	USE diaspr ! suface pressure (rigid-lid) (dia_spr routine)
114	USE flo_oce ! floats variables
115	USE floats ! floats computation (flo_stp routine)
116
117	USE stpctl ! time stepping control (stp_ctl routine)
118	USE restart ! ocean restart (rst_wri routine)
119	USE cpl ! exchanges in coupled mode (cpl_stp routine)
120	USE prtctl ! Print control (prt_ctl routine)
121
122	#if defined key_agrif
123	USE agrif_opa_sponge ! Momemtum and tracers sponges
124	#endif
125
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	!!----------------------------------------------------------------------
135	!! OPA 9.0 , LOCEAN-IPSL (2005)
136	!! $Header$
137	!! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt)
138	!!----------------------------------------------------------------------
139
140	CONTAINS
141
142	#if defined key_agrif
143	SUBROUTINE stp( )
144	#else
145	SUBROUTINE stp( kstp )
146	#endif
147	!!----------------------------------------------------------------------
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
164	#if defined key_agrif
165	INTEGER :: kstp ! ocean time-step index
166	#else
167	INTEGER, INTENT( in ) :: kstp ! ocean time-step index
168	#endif
169
170	!! * local declarations
171	INTEGER :: indic ! error indicator if < 0
172	!! ---------------------------------------------------------------------
173
174	#if defined key_agrif
175	kstp = nit000 + Agrif_Nb_Step()
176	! IF ( Agrif_Root() .and. lwp) Write(,) '---'
177	! IF (lwp) Write(,) 'Grid Number',Agrif_Fixed(),' time step ',kstp
178	#endif
179	indic = 1 ! reset to no error condition
180
181	adatrj = adatrj + rdt/86400._wp
182
183	CALL day( kstp ) ! Calendar
184
185	CALL rst_opn( kstp ) ! Open the restart file
186
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
197	IF( lk_dtasss ) CALL dta_sss( kstp ) ! Sea Surface Salinity data
198
199	IF( lk_obc ) CALL obc_dta( kstp ) ! update dynamic and tracer data at open boundaries
200
201	IF( lk_obc ) CALL obc_rad( kstp ) ! compute phase velocities at open boundaries
202
203	CALL tau( kstp ) ! wind stress
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
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)
232	CALL prt_ctl(tab2d_1=taux , clinfo1=' tau - x : ', tab2d_2=tauy, clinfo2=' - y : ', ovlap=1)
233	ENDIF
234
235
236	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
237	! Ocean physics update
238	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
239	!-----------------------------------------------------------------------
240	! VERTICAL PHYSICS
241	!-----------------------------------------------------------------------
242	! N.B. ua, va, ta, sa arrays are used as workspace in this section
243	!-----------------------------------------------------------------------
244
245	CALL bn2( tb, sb, rn2 ) ! before Brunt-Vaisala frequency
246
247	! ! Vertical eddy viscosity and diffusivity coefficients
248	IF( lk_zdfric ) CALL zdf_ric( kstp ) ! Richardson number dependent Kz
249	#if defined key_mpp_omp
250	IF( lk_zdftke ) CALL zdf_tke_jki( kstp ) ! TKE closure scheme for Kz - j-k-i loops
251	#else
252	IF( lk_zdftke ) CALL zdf_tke( kstp ) ! TKE closure scheme for Kz
253	#endif
254	IF( lk_zdfkpp ) CALL zdf_kpp( kstp ) ! KPP closure scheme for Kz
255
256	IF( lk_zdfcst ) avt (:,:,:) = avt0 * tmask(:,:,:) ! Constant Kz (reset avt to the background value)
257
258	IF( cp_cfg == "orca" ) THEN ! ORCA: Reduce vertical mixing in some specific areas
259	SELECT CASE ( jp_cfg )
260	CASE ( 05 ) ! ORCA R2 configuration
261	avt (:,:,2) = avt (:,:,2) + 1.e-3 * upsrnfh(:,:) ! increase diffusivity of rivers mouths
262	CASE ( 025 ) ! ORCA R025 configuration
263	avt (:,:,2) = avt (:,:,2) + 2.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
269	IF( lk_zdfddm .AND. .NOT. lk_zdfkpp) &
270	& CALL zdf_ddm( kstp ) ! double diffusive mixing
271
272	CALL zdf_bfr( kstp ) ! bottom friction
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
297	CALL trc_stp( kstp, indic ) ! time-stepping
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
308	ta(:,:,:) = 0.e0 ! set tracer trends to zero
309	sa(:,:,:) = 0.e0
310
311	CALL tra_sbc ( kstp ) ! surface boundary condition
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
320	IF( lk_tradmp ) CALL tra_dmp ( kstp ) ! internal damping trends
321
322	CALL tra_adv ( kstp ) ! horizontal & vertical advection
323
324	IF( n_cla == 1 ) CALL tra_cla ( kstp ) ! Cross Land Advection (Update Hor. advection)
325
326	IF( lk_zdfkpp ) CALL tra_kpp ( kstp ) ! KPP non-local tracer fluxes
327
328	CALL tra_ldf ( kstp ) ! lateral mixing
329	#if defined key_agrif
330	IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_tra( kstp ) ! tracers sponge
331	#endif
332	CALL tra_zdf ( kstp ) ! vertical mixing
333
334	CALL tra_nxt( kstp ) ! tracer fields at next time step
335
336	IF( ln_zdfnpc ) CALL tra_npc( kstp ) ! update the new (t,s) fields by non
337	! ! penetrative convective adjustment
338
339	IF( ln_dynhpg_imp ) THEN ! semi-implicit hpg
340	CALL eos( ta, sa, rhd, rhop ) ! Time-filtered in situ density used in dynhpg module
341	IF( ln_zps ) CALL zps_hde( kstp, ta, sa, rhd, & ! Partial steps: time filtered hor. gradient
342	& gtu, gsu, gru, & ! of t, s, rd at the bottom ocean level
343	& gtv, gsv, grv )
344	ELSE ! centered hpg (default case)
345	CALL eos( tb, sb, rhd, rhop ) ! now (swap=before) in situ density for dynhpg module
346	IF( ln_zps ) CALL zps_hde( kstp, tb, sb, rhd, & ! Partial steps: now horizontal gradient
347	& gtu, gsu, gru, & ! of t, s, rd at the bottom ocean level
348	& gtv, gsv, grv )
349	ENDIF
350
351	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
352	! Dynamics
353	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
354	! N.B. ta, sa arrays are used as workspace in this section
355	!-----------------------------------------------------------------------
356
357
358	ua(:,:,:) = 0.e0 ! set dynamics trends to zero
359	va(:,:,:) = 0.e0
360
361	CALL dyn_keg( kstp ) ! horizontal gradient of kinetic energy
362
363	CALL dyn_vor( kstp ) ! vorticity term including Coriolis
364
365	CALL dyn_ldf( kstp ) ! lateral mixing
366	#if defined key_agrif
367	IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_dyn( kstp ) ! momemtum sponge
368	#endif
369	CALL dyn_hpg( kstp ) ! horizontal gradient of Hydrostatic pressure
370
371	CALL dyn_zad( kstp ) ! vertical advection
372
373	CALL dyn_zdf( kstp ) ! vertical diffusion
374
375	IF( lk_dynspg_rl ) THEN
376	IF( lk_obc ) CALL obc_spg( kstp ) ! surface pressure gradient at open boundaries
377	ENDIF
378	indic=0
379	!i bug lbc sur emp
380	CALL lbc_lnk( emp, 'T', 1. )
381	!i
382	CALL dyn_spg( kstp, indic ) ! surface pressure gradient
383
384	CALL dyn_nxt( kstp ) ! lateral velocity at next time step
385
386
387	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
388	! Computation of diagnostic variables
389	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
390	! N.B. ua, va, ta, sa arrays are used as workspace in this section
391	!-----------------------------------------------------------------------
392
393	CALL oc_fz_pt ! ocean surface freezing temperature
394
395	CALL div_cur( kstp ) ! Horizontal divergence & Relative vorticity
396
397	IF( n_cla == 1 ) CALL div_cla( kstp ) ! Cross Land Advection (Update Hor. divergence)
398
399	CALL wzv( kstp ) ! Vertical velocity
400
401
402
403	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
404	! Control, and restarts
405	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
406	! N.B. ua, va, ta, sa arrays are used as workspace in this section
407	!-----------------------------------------------------------------------
408	! ! Time loop: control and print
409	CALL stp_ctl( kstp, indic )
410	IF( indic < 0 ) CALL ctl_stop( 'step: indic < 0' )
411
412	IF( kstp == nit000 ) CALL iom_close( numror ) ! close input ocean restart file
413	IF( lrst_oce ) CALL rst_write ( kstp ) ! write output ocean restart file
414	IF( lk_obc ) CALL obc_rst_wri( kstp ) ! write open boundary restart file
415	IF( lk_trdmld ) CALL trd_mld_rst_write( kstp ) ! ocean model: restart file output for trends diagnostics
416
417
418	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
419	! diagnostics and outputs
420	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
421	! N.B. ua, va, ta, sa arrays are used as workspace in this section
422	!-----------------------------------------------------------------------
423
424	IF ( nstop == 0 ) THEN ! Diagnostics
425	IF( lk_floats ) CALL flo_stp( kstp ) ! drifting Floats
426	IF( lk_trddyn ) CALL trd_dwr( kstp ) ! trends: dynamics
427	IF( lk_trdtra ) CALL trd_twr( kstp ) ! trends: active tracers
428	IF( lk_trdmld ) CALL trd_mld( kstp ) ! trends: Mixed-layer
429	IF( lk_trdvor ) CALL trd_vor( kstp ) ! trends: vorticity budget
430	IF( lk_diaspr ) CALL dia_spr( kstp ) ! Surface pressure diagnostics
431	IF( lk_diahth ) CALL dia_hth( kstp ) ! Thermocline depth (20 degres isotherm depth)
432	IF( lk_diagap ) CALL dia_gap( kstp ) ! basin averaged diagnostics
433	IF( lk_diahdy ) CALL dia_hdy( kstp ) ! dynamical heigh diagnostics
434	IF( lk_diafwb ) CALL dia_fwb( kstp ) ! Fresh water budget diagnostics
435	IF( ln_diaptr ) CALL dia_ptr( kstp ) ! Poleward TRansports diagnostics
436
437	! ! Outputs
438	CALL dia_wri ( kstp, indic ) ! ocean model: outputs
439	ENDIF
440
441	!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
442	! Coupled mode
443	!<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
444
445	IF( lk_cpl ) CALL cpl_stp( kstp ) ! coupled mode : field exchanges
446	!
447	END SUBROUTINE stp
448
449	!!======================================================================
450	END MODULE step

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