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source: branches/2017/dev_merge_2017/NEMOGCM/NEMO/OPA_SRC/DYN/dynnxt.F90 @ 9226

Last change on this file since 9226 was 9226, checked in by gm, 6 years ago
dev_merge_2017: #2002 : dynnxt.F90 and icbtrj.F90: minor bug correction
Property svn:keywords set to `Id`
File size: 19.6 KB

Rev	Line
[3]	1	MODULE dynnxt
[1502]	2	!!=========================================================================
[3]	3	!! * MODULE dynnxt *
	4	!! Ocean dynamics: time stepping
[1502]	5	!!=========================================================================
[1438]	6	!! History : OPA ! 1987-02 (P. Andrich, D. L Hostis) Original code
	7	!! ! 1990-10 (C. Levy, G. Madec)
	8	!! 7.0 ! 1993-03 (M. Guyon) symetrical conditions
	9	!! 8.0 ! 1997-02 (G. Madec & M. Imbard) opa, release 8.0
	10	!! 8.2 ! 1997-04 (A. Weaver) Euler forward step
	11	!! - ! 1997-06 (G. Madec) lateral boudary cond., lbc routine
	12	!! NEMO 1.0 ! 2002-08 (G. Madec) F90: Free form and module
	13	!! - ! 2002-10 (C. Talandier, A-M. Treguier) Open boundary cond.
	14	!! 2.0 ! 2005-11 (V. Garnier) Surface pressure gradient organization
	15	!! 2.3 ! 2007-07 (D. Storkey) Calls to BDY routines.
[1502]	16	!! 3.2 ! 2009-06 (G. Madec, R.Benshila) re-introduce the vvl option
[2528]	17	!! 3.3 ! 2010-09 (D. Storkey, E.O'Dea) Bug fix for BDY module
[2723]	18	!! 3.3 ! 2011-03 (P. Oddo) Bug fix for time-splitting+(BDY-OBC) and not VVL
[4292]	19	!! 3.5 ! 2013-07 (J. Chanut) Compliant with time splitting changes
[6140]	20	!! 3.6 ! 2014-04 (G. Madec) add the diagnostic of the time filter trends
[5930]	21	!! 3.7 ! 2015-11 (J. Chanut) Free surface simplification
[1502]	22	!!-------------------------------------------------------------------------
[1438]	23
[1502]	24	!!-------------------------------------------------------------------------
[6140]	25	!! dyn_nxt : obtain the next (after) horizontal velocity
[1502]	26	!!-------------------------------------------------------------------------
[6140]	27	USE oce ! ocean dynamics and tracers
	28	USE dom_oce ! ocean space and time domain
	29	USE sbc_oce ! Surface boundary condition: ocean fields
[9023]	30	USE sbcrnf ! river runoffs
[6140]	31	USE phycst ! physical constants
	32	USE dynadv ! dynamics: vector invariant versus flux form
	33	USE dynspg_ts ! surface pressure gradient: split-explicit scheme
	34	USE domvvl ! variable volume
[7646]	35	USE bdy_oce , ONLY: ln_bdy
[6140]	36	USE bdydta ! ocean open boundary conditions
	37	USE bdydyn ! ocean open boundary conditions
	38	USE bdyvol ! ocean open boundary condition (bdy_vol routines)
	39	USE trd_oce ! trends: ocean variables
	40	USE trddyn ! trend manager: dynamics
	41	USE trdken ! trend manager: kinetic energy
[4990]	42	!
[6140]	43	USE in_out_manager ! I/O manager
	44	USE iom ! I/O manager library
	45	USE lbclnk ! lateral boundary condition (or mpp link)
	46	USE lib_mpp ! MPP library
	47	USE prtctl ! Print control
	48	USE timing ! Timing
[2528]	49	#if defined key_agrif
	50	USE agrif_opa_interp
	51	#endif
[3]	52
	53	IMPLICIT NONE
	54	PRIVATE
	55
[1438]	56	PUBLIC dyn_nxt ! routine called by step.F90
	57
[2715]	58	!!----------------------------------------------------------------------
[9019]	59	!! NEMO/OPA 4.0 , NEMO Consortium (2017)
[1438]	60	!! $Id$
[2715]	61	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
	62	!!----------------------------------------------------------------------
[3]	63	CONTAINS
	64
	65	SUBROUTINE dyn_nxt ( kt )
	66	!!----------------------------------------------------------------------
	67	!! * ROUTINE dyn_nxt *
	68	!!
[5930]	69	!! ** Purpose : Finalize after horizontal velocity. Apply the boundary
	70	!! condition on the after velocity, achieve the time stepping
[1502]	71	!! by applying the Asselin filter on now fields and swapping
	72	!! the fields.
[3]	73	!!
[5930]	74	!! ** Method : * Ensure after velocities transport matches time splitting
	75	!! estimate (ln_dynspg_ts=T)
[3]	76	!!
[1502]	77	!! * Apply lateral boundary conditions on after velocity
	78	!! at the local domain boundaries through lbc_lnk call,
[7646]	79	!! at the one-way open boundaries (ln_bdy=T),
[4990]	80	!! at the AGRIF zoom boundaries (lk_agrif=T)
[3]	81	!!
[1502]	82	!! * Apply the time filter applied and swap of the dynamics
	83	!! arrays to start the next time step:
	84	!! (ub,vb) = (un,vn) + atfp [ (ub,vb) + (ua,va) - 2 (un,vn) ]
	85	!! (un,vn) = (ua,va).
[6140]	86	!! Note that with flux form advection and non linear free surface,
	87	!! the time filter is applied on thickness weighted velocity.
	88	!! As a result, dyn_nxt MUST be called after tra_nxt.
[1502]	89	!!
	90	!! ** Action : ub,vb filtered before horizontal velocity of next time-step
	91	!! un,vn now horizontal velocity of next time-step
[3]	92	!!----------------------------------------------------------------------
	93	INTEGER, INTENT( in ) :: kt ! ocean time-step index
[2715]	94	!
[3]	95	INTEGER :: ji, jj, jk ! dummy loop indices
[6140]	96	INTEGER :: ikt ! local integers
	97	REAL(wp) :: zue3a, zue3n, zue3b, zuf, zcoef ! local scalars
[4990]	98	REAL(wp) :: zve3a, zve3n, zve3b, zvf, z1_2dt ! - -
[9019]	99	REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zue, zve
	100	REAL(wp), ALLOCATABLE, DIMENSION(:,:,:) :: ze3u_f, ze3v_f, zua, zva
[1502]	101	!!----------------------------------------------------------------------
[3294]	102	!
[9019]	103	IF( ln_timing ) CALL timing_start('dyn_nxt')
	104	IF( ln_dynspg_ts ) ALLOCATE( zue(jpi,jpj) , zve(jpi,jpj) )
	105	IF( l_trddyn ) ALLOCATE( zua(jpi,jpj,jpk) , zva(jpi,jpj,jpk) )
[3294]	106	!
[3]	107	IF( kt == nit000 ) THEN
	108	IF(lwp) WRITE(numout,*)
	109	IF(lwp) WRITE(numout,*) 'dyn_nxt : time stepping'
	110	IF(lwp) WRITE(numout,*) '~~~~~~~'
	111	ENDIF
	112
[5930]	113	IF ( ln_dynspg_ts ) THEN
	114	! Ensure below that barotropic velocities match time splitting estimate
	115	! Compute actual transport and replace it with ts estimate at "after" time step
[7753]	116	zue(:,:) = e3u_a(:,:,1) * ua(:,:,1) * umask(:,:,1)
	117	zve(:,:) = e3v_a(:,:,1) * va(:,:,1) * vmask(:,:,1)
[5930]	118	DO jk = 2, jpkm1
[7753]	119	zue(:,:) = zue(:,:) + e3u_a(:,:,jk) * ua(:,:,jk) * umask(:,:,jk)
	120	zve(:,:) = zve(:,:) + e3v_a(:,:,jk) * va(:,:,jk) * vmask(:,:,jk)
[1502]	121	END DO
	122	DO jk = 1, jpkm1
[7753]	123	ua(:,:,jk) = ( ua(:,:,jk) - zue(:,:) * r1_hu_a(:,:) + ua_b(:,:) ) * umask(:,:,jk)
	124	va(:,:,jk) = ( va(:,:,jk) - zve(:,:) * r1_hv_a(:,:) + va_b(:,:) ) * vmask(:,:,jk)
[592]	125	END DO
[6140]	126	!
	127	IF( .NOT.ln_bt_fw ) THEN
[5930]	128	! Remove advective velocity from "now velocities"
	129	! prior to asselin filtering
	130	! In the forward case, this is done below after asselin filtering
	131	! so that asselin contribution is removed at the same time
	132	DO jk = 1, jpkm1
[9023]	133	un(:,:,jk) = ( un(:,:,jk) - un_adv(:,:)r1_hu_n(:,:) + un_b(:,:) )umask(:,:,jk)
	134	vn(:,:,jk) = ( vn(:,:,jk) - vn_adv(:,:)r1_hv_n(:,:) + vn_b(:,:) )vmask(:,:,jk)
[7753]	135	END DO
[5930]	136	ENDIF
[4292]	137	ENDIF
	138
[1502]	139	! Update after velocity on domain lateral boundaries
	140	! --------------------------------------------------
[5930]	141	# if defined key_agrif
	142	CALL Agrif_dyn( kt ) !* AGRIF zoom boundaries
	143	# endif
	144	!
[9090]	145	CALL lbc_lnk_multi( ua, 'U', -1., va, 'V', -1. ) !* local domain boundaries
[1502]	146	!
	147	! !* BDY open boundaries
[7646]	148	IF( ln_bdy .AND. ln_dynspg_exp ) CALL bdy_dyn( kt )
	149	IF( ln_bdy .AND. ln_dynspg_ts ) CALL bdy_dyn( kt, dyn3d_only=.true. )
[3294]	150
	151	!!$ Do we need a call to bdy_vol here??
	152	!
[4990]	153	IF( l_trddyn ) THEN ! prepare the atf trend computation + some diagnostics
	154	z1_2dt = 1._wp / (2. * rdt) ! Euler or leap-frog time step
	155	IF( neuler == 0 .AND. kt == nit000 ) z1_2dt = 1._wp / rdt
	156	!
	157	! ! Kinetic energy and Conversion
	158	IF( ln_KE_trd ) CALL trd_dyn( ua, va, jpdyn_ken, kt )
	159	!
	160	IF( ln_dyn_trd ) THEN ! 3D output: total momentum trends
[7753]	161	zua(:,:,:) = ( ua(:,:,:) - ub(:,:,:) ) * z1_2dt
	162	zva(:,:,:) = ( va(:,:,:) - vb(:,:,:) ) * z1_2dt
[4990]	163	CALL iom_put( "utrd_tot", zua ) ! total momentum trends, except the asselin time filter
	164	CALL iom_put( "vtrd_tot", zva )
	165	ENDIF
	166	!
[7753]	167	zua(:,:,:) = un(:,:,:) ! save the now velocity before the asselin filter
	168	zva(:,:,:) = vn(:,:,:) ! (caution: there will be a shift by 1 timestep in the
	169	! ! computation of the asselin filter trends)
[4990]	170	ENDIF
	171
[1438]	172	! Time filter and swap of dynamics arrays
	173	! ------------------------------------------
[1502]	174	IF( neuler == 0 .AND. kt == nit000 ) THEN !* Euler at first time-step: only swap
	175	DO jk = 1, jpkm1
[9226]	176	un(:,:,jk) = ua(:,:,jk) ! un <-- ua
[7753]	177	vn(:,:,jk) = va(:,:,jk)
[1438]	178	END DO
[9226]	179	IF( .NOT.ln_linssh ) THEN ! e3._b <-- e3._n
	180	!!gm BUG ???? I don't understand why it is not : e3._n <-- e3._a
[4292]	181	DO jk = 1, jpkm1
[9226]	182	! e3t_b(:,:,jk) = e3t_n(:,:,jk)
	183	! e3u_b(:,:,jk) = e3u_n(:,:,jk)
	184	! e3v_b(:,:,jk) = e3v_n(:,:,jk)
	185	!
	186	e3t_n(:,:,jk) = e3t_a(:,:,jk)
	187	e3u_n(:,:,jk) = e3u_a(:,:,jk)
	188	e3v_n(:,:,jk) = e3v_a(:,:,jk)
[6140]	189	END DO
[9226]	190	!!gm BUG end
[4292]	191	ENDIF
[9226]	192	!
	193
[1502]	194	ELSE !* Leap-Frog : Asselin filter and swap
[2528]	195	! ! =============!
[6140]	196	IF( ln_linssh ) THEN ! Fixed volume !
[2528]	197	! ! =============!
[1502]	198	DO jk = 1, jpkm1
[592]	199	DO jj = 1, jpj
[1502]	200	DO ji = 1, jpi
[4990]	201	zuf = un(ji,jj,jk) + atfp * ( ub(ji,jj,jk) - 2._wp * un(ji,jj,jk) + ua(ji,jj,jk) )
	202	zvf = vn(ji,jj,jk) + atfp * ( vb(ji,jj,jk) - 2._wp * vn(ji,jj,jk) + va(ji,jj,jk) )
[1502]	203	!
	204	ub(ji,jj,jk) = zuf ! ub <-- filtered velocity
	205	vb(ji,jj,jk) = zvf
	206	un(ji,jj,jk) = ua(ji,jj,jk) ! un <-- ua
	207	vn(ji,jj,jk) = va(ji,jj,jk)
	208	END DO
	209	END DO
	210	END DO
[2528]	211	! ! ================!
	212	ELSE ! Variable volume !
	213	! ! ================!
[4292]	214	! Before scale factor at t-points
	215	! (used as a now filtered scale factor until the swap)
	216	! ----------------------------------------------------
[9023]	217	DO jk = 1, jpkm1
	218	e3t_b(:,:,jk) = e3t_n(:,:,jk) + atfp * ( e3t_b(:,:,jk) - 2._wp * e3t_n(:,:,jk) + e3t_a(:,:,jk) )
	219	END DO
	220	! Add volume filter correction: compatibility with tracer advection scheme
	221	! => time filter + conservation correction (only at the first level)
	222	zcoef = atfp * rdt * r1_rau0
	223	IF ( .NOT. ln_isf ) THEN ! if no ice shelf melting
	224	e3t_b(:,:,1) = e3t_b(:,:,1) - zcoef * ( emp_b(:,:) - emp(:,:) &
	225	& - rnf_b(:,:) + rnf(:,:) ) * tmask(:,:,1)
	226	ELSE ! if ice shelf melting
	227	DO jj = 1, jpj
	228	DO ji = 1, jpi
	229	ikt = mikt(ji,jj)
	230	e3t_b(ji,jj,ikt) = e3t_b(ji,jj,ikt) - zcoef * ( emp_b (ji,jj) - emp (ji,jj) &
	231	& - rnf_b (ji,jj) + rnf (ji,jj) &
	232	& + fwfisf_b(ji,jj) - fwfisf(ji,jj) ) * tmask(ji,jj,ikt)
	233	END DO
[6140]	234	END DO
[4292]	235	! Add volume filter correction: compatibility with tracer advection scheme
	236	! => time filter + conservation correction (only at the first level)
[6140]	237	zcoef = atfp * rdt * r1_rau0
	238	IF ( .NOT. ln_isf ) THEN ! if no ice shelf melting
[7753]	239	e3t_b(:,:,1) = e3t_b(:,:,1) - zcoef * ( emp_b(:,:) - emp(:,:) &
[9023]	240	& ) * tmask(:,:,1)
	241	IF( ln_rnf_depth ) THEN
	242	DO jk = 1, jpkm1 ! Deal with Rivers separetely, as can be through depth too, not sure for ice shelf case yet
	243	DO jj = 1, jpj
	244	DO ji = 1, jpi
	245	IF( mikt(ji,jj) <= jk .and. jk <= nk_rnf(ji,jj) ) THEN
[9119]	246	e3t_b(ji,jj,jk) = e3t_b(ji,jj,jk) - zcoef * ( - rnf_b(ji,jj) + rnf(ji,jj) ) &
	247	& * ( e3t_n(ji,jj,jk) / h_rnf(ji,jj) ) * tmask(ji,jj,jk)
[9023]	248	ENDIF
	249	ENDDO
	250	ENDDO
	251	ENDDO
	252	ELSE
	253	e3t_b(:,:,1) = e3t_b(:,:,1) - zcoef * ( -rnf_b(:,:) + rnf(:,:))*tmask(:,:,1)
	254	ENDIF
[5643]	255	ELSE ! if ice shelf melting
[6140]	256	DO jj = 1, jpj
	257	DO ji = 1, jpi
	258	ikt = mikt(ji,jj)
	259	e3t_b(ji,jj,ikt) = e3t_b(ji,jj,ikt) - zcoef * ( emp_b (ji,jj) - emp (ji,jj) &
	260	& - rnf_b (ji,jj) + rnf (ji,jj) &
	261	& + fwfisf_b(ji,jj) - fwfisf(ji,jj) ) * tmask(ji,jj,ikt)
[5643]	262	END DO
	263	END DO
	264	END IF
[9023]	265	END IF
[2528]	266	!
[6140]	267	IF( ln_dynadv_vec ) THEN ! Asselin filter applied on velocity
	268	! Before filtered scale factor at (u/v)-points
	269	CALL dom_vvl_interpol( e3t_b(:,:,:), e3u_b(:,:,:), 'U' )
	270	CALL dom_vvl_interpol( e3t_b(:,:,:), e3v_b(:,:,:), 'V' )
[4292]	271	DO jk = 1, jpkm1
	272	DO jj = 1, jpj
[2528]	273	DO ji = 1, jpi
[4292]	274	zuf = un(ji,jj,jk) + atfp * ( ub(ji,jj,jk) - 2._wp * un(ji,jj,jk) + ua(ji,jj,jk) )
	275	zvf = vn(ji,jj,jk) + atfp * ( vb(ji,jj,jk) - 2._wp * vn(ji,jj,jk) + va(ji,jj,jk) )
[2528]	276	!
	277	ub(ji,jj,jk) = zuf ! ub <-- filtered velocity
	278	vb(ji,jj,jk) = zvf
	279	un(ji,jj,jk) = ua(ji,jj,jk) ! un <-- ua
	280	vn(ji,jj,jk) = va(ji,jj,jk)
	281	END DO
	282	END DO
	283	END DO
	284	!
[6140]	285	ELSE ! Asselin filter applied on thickness weighted velocity
	286	!
[9019]	287	ALLOCATE( ze3u_f(jpi,jpj,jpk) , ze3v_f(jpi,jpj,jpk) )
[6140]	288	! Before filtered scale factor at (u/v)-points stored in ze3u_f, ze3v_f
	289	CALL dom_vvl_interpol( e3t_b(:,:,:), ze3u_f, 'U' )
	290	CALL dom_vvl_interpol( e3t_b(:,:,:), ze3v_f, 'V' )
[4292]	291	DO jk = 1, jpkm1
	292	DO jj = 1, jpj
[4312]	293	DO ji = 1, jpi
[6140]	294	zue3a = e3u_a(ji,jj,jk) * ua(ji,jj,jk)
	295	zve3a = e3v_a(ji,jj,jk) * va(ji,jj,jk)
	296	zue3n = e3u_n(ji,jj,jk) * un(ji,jj,jk)
	297	zve3n = e3v_n(ji,jj,jk) * vn(ji,jj,jk)
	298	zue3b = e3u_b(ji,jj,jk) * ub(ji,jj,jk)
	299	zve3b = e3v_b(ji,jj,jk) * vb(ji,jj,jk)
[2528]	300	!
[3294]	301	zuf = ( zue3n + atfp * ( zue3b - 2._wp * zue3n + zue3a ) ) / ze3u_f(ji,jj,jk)
	302	zvf = ( zve3n + atfp * ( zve3b - 2._wp * zve3n + zve3a ) ) / ze3v_f(ji,jj,jk)
[2528]	303	!
[3294]	304	ub(ji,jj,jk) = zuf ! ub <-- filtered velocity
[2528]	305	vb(ji,jj,jk) = zvf
[3294]	306	un(ji,jj,jk) = ua(ji,jj,jk) ! un <-- ua
[2528]	307	vn(ji,jj,jk) = va(ji,jj,jk)
	308	END DO
	309	END DO
	310	END DO
[7753]	311	e3u_b(:,:,1:jpkm1) = ze3u_f(:,:,1:jpkm1) ! e3u_b <-- filtered scale factor
	312	e3v_b(:,:,1:jpkm1) = ze3v_f(:,:,1:jpkm1)
[6140]	313	!
[9019]	314	DEALLOCATE( ze3u_f , ze3v_f )
[2528]	315	ENDIF
	316	!
[3]	317	ENDIF
[2528]	318	!
[6140]	319	IF( ln_dynspg_ts .AND. ln_bt_fw ) THEN
[4312]	320	! Revert "before" velocities to time split estimate
	321	! Doing it here also means that asselin filter contribution is removed
[7753]	322	zue(:,:) = e3u_b(:,:,1) * ub(:,:,1) * umask(:,:,1)
	323	zve(:,:) = e3v_b(:,:,1) * vb(:,:,1) * vmask(:,:,1)
[4990]	324	DO jk = 2, jpkm1
[7753]	325	zue(:,:) = zue(:,:) + e3u_b(:,:,jk) * ub(:,:,jk) * umask(:,:,jk)
	326	zve(:,:) = zve(:,:) + e3v_b(:,:,jk) * vb(:,:,jk) * vmask(:,:,jk)
[4370]	327	END DO
	328	DO jk = 1, jpkm1
[7753]	329	ub(:,:,jk) = ub(:,:,jk) - (zue(:,:) * r1_hu_n(:,:) - un_b(:,:)) * umask(:,:,jk)
	330	vb(:,:,jk) = vb(:,:,jk) - (zve(:,:) * r1_hv_n(:,:) - vn_b(:,:)) * vmask(:,:,jk)
[4292]	331	END DO
	332	ENDIF
	333	!
	334	ENDIF ! neuler =/0
[4354]	335	!
	336	! Set "now" and "before" barotropic velocities for next time step:
	337	! JC: Would be more clever to swap variables than to make a full vertical
	338	! integration
	339	!
[4370]	340	!
[6140]	341	IF(.NOT.ln_linssh ) THEN
[7753]	342	hu_b(:,:) = e3u_b(:,:,1) * umask(:,:,1)
	343	hv_b(:,:) = e3v_b(:,:,1) * vmask(:,:,1)
[6140]	344	DO jk = 2, jpkm1
[7753]	345	hu_b(:,:) = hu_b(:,:) + e3u_b(:,:,jk) * umask(:,:,jk)
	346	hv_b(:,:) = hv_b(:,:) + e3v_b(:,:,jk) * vmask(:,:,jk)
[4354]	347	END DO
[7753]	348	r1_hu_b(:,:) = ssumask(:,:) / ( hu_b(:,:) + 1._wp - ssumask(:,:) )
	349	r1_hv_b(:,:) = ssvmask(:,:) / ( hv_b(:,:) + 1._wp - ssvmask(:,:) )
[4354]	350	ENDIF
	351	!
[7753]	352	un_b(:,:) = e3u_a(:,:,1) * un(:,:,1) * umask(:,:,1)
	353	ub_b(:,:) = e3u_b(:,:,1) * ub(:,:,1) * umask(:,:,1)
	354	vn_b(:,:) = e3v_a(:,:,1) * vn(:,:,1) * vmask(:,:,1)
	355	vb_b(:,:) = e3v_b(:,:,1) * vb(:,:,1) * vmask(:,:,1)
[6140]	356	DO jk = 2, jpkm1
[7753]	357	un_b(:,:) = un_b(:,:) + e3u_a(:,:,jk) * un(:,:,jk) * umask(:,:,jk)
	358	ub_b(:,:) = ub_b(:,:) + e3u_b(:,:,jk) * ub(:,:,jk) * umask(:,:,jk)
	359	vn_b(:,:) = vn_b(:,:) + e3v_a(:,:,jk) * vn(:,:,jk) * vmask(:,:,jk)
	360	vb_b(:,:) = vb_b(:,:) + e3v_b(:,:,jk) * vb(:,:,jk) * vmask(:,:,jk)
[4354]	361	END DO
[7753]	362	un_b(:,:) = un_b(:,:) * r1_hu_a(:,:)
	363	vn_b(:,:) = vn_b(:,:) * r1_hv_a(:,:)
	364	ub_b(:,:) = ub_b(:,:) * r1_hu_b(:,:)
	365	vb_b(:,:) = vb_b(:,:) * r1_hv_b(:,:)
[4354]	366	!
[6140]	367	IF( .NOT.ln_dynspg_ts ) THEN ! output the barotropic currents
	368	CALL iom_put( "ubar", un_b(:,:) )
	369	CALL iom_put( "vbar", vn_b(:,:) )
	370	ENDIF
[4990]	371	IF( l_trddyn ) THEN ! 3D output: asselin filter trends on momentum
[7753]	372	zua(:,:,:) = ( ub(:,:,:) - zua(:,:,:) ) * z1_2dt
	373	zva(:,:,:) = ( vb(:,:,:) - zva(:,:,:) ) * z1_2dt
[4990]	374	CALL trd_dyn( zua, zva, jpdyn_atf, kt )
	375	ENDIF
	376	!
[1438]	377	IF(ln_ctl) CALL prt_ctl( tab3d_1=un, clinfo1=' nxt - Un: ', mask1=umask, &
	378	& tab3d_2=vn, clinfo2=' Vn: ' , mask2=vmask )
[6140]	379	!
[9019]	380	IF( ln_dynspg_ts ) DEALLOCATE( zue, zve )
	381	IF( l_trddyn ) DEALLOCATE( zua, zva )
	382	IF( ln_timing ) CALL timing_stop('dyn_nxt')
[2715]	383	!
[3]	384	END SUBROUTINE dyn_nxt
	385
[1502]	386	!!=========================================================================
[3]	387	END MODULE dynnxt

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