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dynnxt.F90 in NEMO/branches/2019/dev_r10721_KERNEL-02_Storkey_Coward_IMMERSE_first_steps/src/OCE/DYN – NEMO

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source: NEMO/branches/2019/dev_r10721_KERNEL-02_Storkey_Coward_IMMERSE_first_steps/src/OCE/DYN/dynnxt.F90 @ 10743

Last change on this file since 10743 was 10743, checked in by davestorkey, 5 years ago

First block of changes:

New state variables uu, vv, e3X and corresponding temporary pointers.
Updated code for time-filtering and time-level-swapping uu, vv, e3X.
DYN routines not updated to use new variables at this stage.

Property svn:keywords set to Id

File size: 19.9 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
[9361]	31	USE sbcisf ! ice shelf
[6140]	32	USE phycst ! physical constants
	33	USE dynadv ! dynamics: vector invariant versus flux form
	34	USE dynspg_ts ! surface pressure gradient: split-explicit scheme
	35	USE domvvl ! variable volume
[7646]	36	USE bdy_oce , ONLY: ln_bdy
[6140]	37	USE bdydta ! ocean open boundary conditions
	38	USE bdydyn ! ocean open boundary conditions
	39	USE bdyvol ! ocean open boundary condition (bdy_vol routines)
	40	USE trd_oce ! trends: ocean variables
	41	USE trddyn ! trend manager: dynamics
	42	USE trdken ! trend manager: kinetic energy
[4990]	43	!
[6140]	44	USE in_out_manager ! I/O manager
	45	USE iom ! I/O manager library
	46	USE lbclnk ! lateral boundary condition (or mpp link)
	47	USE lib_mpp ! MPP library
	48	USE prtctl ! Print control
	49	USE timing ! Timing
[2528]	50	#if defined key_agrif
[9570]	51	USE agrif_oce_interp
[2528]	52	#endif
[3]	53
	54	IMPLICIT NONE
	55	PRIVATE
	56
[1438]	57	PUBLIC dyn_nxt ! routine called by step.F90
	58
[2715]	59	!!----------------------------------------------------------------------
[9598]	60	!! NEMO/OCE 4.0 , NEMO Consortium (2018)
[1438]	61	!! $Id$
[10068]	62	!! Software governed by the CeCILL license (see ./LICENSE)
[2715]	63	!!----------------------------------------------------------------------
[3]	64	CONTAINS
	65
[10743]	66	SUBROUTINE dyn_nxt ( kt, kNm1, kNp1, puu, pvv, pe3t, pe3u, pe3v )
[3]	67	!!----------------------------------------------------------------------
	68	!! * ROUTINE dyn_nxt *
	69	!!
[5930]	70	!! ** Purpose : Finalize after horizontal velocity. Apply the boundary
	71	!! condition on the after velocity, achieve the time stepping
[1502]	72	!! by applying the Asselin filter on now fields and swapping
	73	!! the fields.
[3]	74	!!
[5930]	75	!! ** Method : * Ensure after velocities transport matches time splitting
	76	!! estimate (ln_dynspg_ts=T)
[3]	77	!!
[1502]	78	!! * Apply lateral boundary conditions on after velocity
	79	!! at the local domain boundaries through lbc_lnk call,
[7646]	80	!! at the one-way open boundaries (ln_bdy=T),
[4990]	81	!! at the AGRIF zoom boundaries (lk_agrif=T)
[3]	82	!!
[1502]	83	!! * Apply the time filter applied and swap of the dynamics
	84	!! arrays to start the next time step:
	85	!! (ub,vb) = (un,vn) + atfp [ (ub,vb) + (ua,va) - 2 (un,vn) ]
	86	!! (un,vn) = (ua,va).
[6140]	87	!! Note that with flux form advection and non linear free surface,
	88	!! the time filter is applied on thickness weighted velocity.
	89	!! As a result, dyn_nxt MUST be called after tra_nxt.
[1502]	90	!!
	91	!! ** Action : ub,vb filtered before horizontal velocity of next time-step
	92	!! un,vn now horizontal velocity of next time-step
[3]	93	!!----------------------------------------------------------------------
[10743]	94	INTEGER, INTENT( in ) :: kt ! ocean time-step index
	95	INTEGER, INTENT( in ) :: kNm1, kNp1 ! before and after time level indices
	96	REAL(wp), INTENT( inout), DIMENSION(jpi,jpj,jpk) :: puu, pvv ! now velocities to be time filtered
	97	REAL(wp), INTENT( inout), DIMENSION(jpi,jpj,jpk) :: pe3t, pe3u, pe3v ! now scale factors to be time filtered
[2715]	98	!
[3]	99	INTEGER :: ji, jj, jk ! dummy loop indices
[6140]	100	INTEGER :: ikt ! local integers
[10743]	101	REAL(wp) :: zue3a, zue3n, zue3b, zcoef ! local scalars
	102	REAL(wp) :: zve3a, zve3n, zve3b, z1_2dt ! - -
[9019]	103	REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zue, zve
[10743]	104	REAL(wp), ALLOCATABLE, DIMENSION(:,:,:) :: ze3t_f, ze3u_f, ze3v_f, zua, zva
[1502]	105	!!----------------------------------------------------------------------
[3294]	106	!
[9019]	107	IF( ln_timing ) CALL timing_start('dyn_nxt')
	108	IF( ln_dynspg_ts ) ALLOCATE( zue(jpi,jpj) , zve(jpi,jpj) )
	109	IF( l_trddyn ) ALLOCATE( zua(jpi,jpj,jpk) , zva(jpi,jpj,jpk) )
[3294]	110	!
[3]	111	IF( kt == nit000 ) THEN
	112	IF(lwp) WRITE(numout,*)
	113	IF(lwp) WRITE(numout,*) 'dyn_nxt : time stepping'
	114	IF(lwp) WRITE(numout,*) '~~~~~~~'
	115	ENDIF
	116
[5930]	117	IF ( ln_dynspg_ts ) THEN
	118	! Ensure below that barotropic velocities match time splitting estimate
	119	! Compute actual transport and replace it with ts estimate at "after" time step
[10743]	120	zue(:,:) = e3u(:,:,1,kNp1) * uu(:,:,1,kNp1) * umask(:,:,1)
	121	zve(:,:) = e3v(:,:,1,kNp1) * vv(:,:,1,kNp1) * vmask(:,:,1)
[5930]	122	DO jk = 2, jpkm1
[10743]	123	zue(:,:) = zue(:,:) + e3u(:,:,jk,kNp1) * uu(:,:,jk,kNp1) * umask(:,:,jk)
	124	zve(:,:) = zve(:,:) + e3v(:,:,jk,kNp1) * vv(:,:,jk,kNp1) * vmask(:,:,jk)
[1502]	125	END DO
	126	DO jk = 1, jpkm1
[10743]	127	uu(:,:,jk,kNp1) = ( uu(:,:,jk,kNp1) - zue(:,:) * r1_hu_a(:,:) + ua_b(:,:) ) * umask(:,:,jk)
	128	vv(:,:,jk,kNp1) = ( vv(:,:,jk,kNp1) - zve(:,:) * r1_hv_a(:,:) + va_b(:,:) ) * vmask(:,:,jk)
[592]	129	END DO
[6140]	130	!
	131	IF( .NOT.ln_bt_fw ) THEN
[5930]	132	! Remove advective velocity from "now velocities"
	133	! prior to asselin filtering
	134	! In the forward case, this is done below after asselin filtering
	135	! so that asselin contribution is removed at the same time
	136	DO jk = 1, jpkm1
[10743]	137	puu(:,:,jk) = ( puu(:,:,jk) - un_adv(:,:)r1_hu_n(:,:) + un_b(:,:) )umask(:,:,jk)
	138	pvv(:,:,jk) = ( pvv(:,:,jk) - vn_adv(:,:)r1_hv_n(:,:) + vn_b(:,:) )vmask(:,:,jk)
[7753]	139	END DO
[5930]	140	ENDIF
[4292]	141	ENDIF
	142
[1502]	143	! Update after velocity on domain lateral boundaries
	144	! --------------------------------------------------
[5930]	145	# if defined key_agrif
	146	CALL Agrif_dyn( kt ) !* AGRIF zoom boundaries
	147	# endif
	148	!
[10743]	149	CALL lbc_lnk_multi( 'dynnxt', uu(:,:,:,kNp1), 'U', -1., vv(:,:,:,kNp1), 'V', -1. ) !* local domain boundaries
[1502]	150	!
	151	! !* BDY open boundaries
[7646]	152	IF( ln_bdy .AND. ln_dynspg_exp ) CALL bdy_dyn( kt )
	153	IF( ln_bdy .AND. ln_dynspg_ts ) CALL bdy_dyn( kt, dyn3d_only=.true. )
[3294]	154
	155	!!$ Do we need a call to bdy_vol here??
	156	!
[4990]	157	IF( l_trddyn ) THEN ! prepare the atf trend computation + some diagnostics
	158	z1_2dt = 1._wp / (2. * rdt) ! Euler or leap-frog time step
	159	IF( neuler == 0 .AND. kt == nit000 ) z1_2dt = 1._wp / rdt
	160	!
	161	! ! Kinetic energy and Conversion
[10743]	162	IF( ln_KE_trd ) CALL trd_dyn( uu(:,:,:,kNp1), vv(:,:,:,kNp1), jpdyn_ken, kt )
[4990]	163	!
	164	IF( ln_dyn_trd ) THEN ! 3D output: total momentum trends
[10743]	165	zua(:,:,:) = ( uu(:,:,:,kNp1) - uu(:,:,:,kNm1) ) * z1_2dt
	166	zva(:,:,:) = ( vv(:,:,:,kNp1) - vv(:,:,:,kNm1) ) * z1_2dt
[4990]	167	CALL iom_put( "utrd_tot", zua ) ! total momentum trends, except the asselin time filter
	168	CALL iom_put( "vtrd_tot", zva )
	169	ENDIF
	170	!
[10743]	171	zua(:,:,:) = puu(:,:,:) ! save the now velocity before the asselin filter
	172	zva(:,:,:) = pvv(:,:,:) ! (caution: there will be a shift by 1 timestep in the
[7753]	173	! ! computation of the asselin filter trends)
[4990]	174	ENDIF
	175
[1438]	176	! Time filter and swap of dynamics arrays
	177	! ------------------------------------------
[10743]	178	!! TO BE DELETED
	179	!!$ IF( neuler == 0 .AND. kt == nit000 ) THEN !* Euler at first time-step: only swap
	180	!!$ DO jk = 1, jpkm1
	181	!!$ un(:,:,jk) = ua(:,:,jk) ! un <-- ua
	182	!!$ vn(:,:,jk) = va(:,:,jk)
	183	!!$ END DO
	184	!!$ IF( .NOT.ln_linssh ) THEN ! e3._b <-- e3._n
[9226]	185	!!gm BUG ???? I don't understand why it is not : e3._n <-- e3._a
[10743]	186	!!$ DO jk = 1, jpkm1
[9226]	187	! e3t_b(:,:,jk) = e3t_n(:,:,jk)
	188	! e3u_b(:,:,jk) = e3u_n(:,:,jk)
	189	! e3v_b(:,:,jk) = e3v_n(:,:,jk)
	190	!
[10743]	191	!!$ e3t_n(:,:,jk) = e3t_a(:,:,jk)
	192	!!$ e3u_n(:,:,jk) = e3u_a(:,:,jk)
	193	!!$ e3v_n(:,:,jk) = e3v_a(:,:,jk)
	194	!!$ END DO
[9226]	195	!!gm BUG end
[10743]	196	!!$ ENDIF
	197	!! TO BE DELETED
[9226]	198	!
	199
[10743]	200	IF( .NOT.( neuler == 0 .AND. kt == nit000 ) ) THEN !* Leap-Frog : Asselin filter and swap
[2528]	201	! ! =============!
[6140]	202	IF( ln_linssh ) THEN ! Fixed volume !
[2528]	203	! ! =============!
[1502]	204	DO jk = 1, jpkm1
[592]	205	DO jj = 1, jpj
[1502]	206	DO ji = 1, jpi
[10743]	207	puu(ji,jj,jk) = puu(ji,jj,jk) + atfp * ( uu(ji,jj,jk,kNm1) - 2._wp * puu(ji,jj,jk) + uu(ji,jj,jk,kNp1) )
	208	pvv(ji,jj,jk) = pvv(ji,jj,jk) + atfp * ( vv(ji,jj,jk,kNm1) - 2._wp * pvv(ji,jj,jk) + vv(ji,jj,jk,kNp1) )
[1502]	209	!
[10743]	210	!! TO BE DELETED
	211	!!$ ub(ji,jj,jk) = zuf ! ub <-- filtered velocity
	212	!!$ vb(ji,jj,jk) = zvf
	213	!!$ un(ji,jj,jk) = ua(ji,jj,jk) ! un <-- ua
	214	!!$ vn(ji,jj,jk) = va(ji,jj,jk)
	215	!! TO BE DELETED
[1502]	216	END DO
	217	END DO
	218	END DO
[2528]	219	! ! ================!
	220	ELSE ! Variable volume !
	221	! ! ================!
[10743]	222	! Time-filtered scale factor at t-points
[4292]	223	! ----------------------------------------------------
[10743]	224	ALLOCATE( ze3t_f(jpi,jpj,jpk) )
[9023]	225	DO jk = 1, jpkm1
[10743]	226	ze3t_f(:,:,jk) = pe3t(:,:,jk) + atfp * ( e3t(:,:,jk,kNm1) - 2._wp * pe3t(:,:,jk) + e3t(:,:,jk,kNp1) )
[9023]	227	END DO
	228	! Add volume filter correction: compatibility with tracer advection scheme
	229	! => time filter + conservation correction (only at the first level)
	230	zcoef = atfp * rdt * r1_rau0
[9361]	231
[10743]	232	ze3t_f(:,:,1) = ze3t_f(:,:,1) - zcoef * ( emp_b(:,:) - emp(:,:) ) * tmask(:,:,1)
[9361]	233
	234	IF ( ln_rnf ) THEN
	235	IF( ln_rnf_depth ) THEN
	236	DO jk = 1, jpkm1 ! Deal with Rivers separetely, as can be through depth too
	237	DO jj = 1, jpj
	238	DO ji = 1, jpi
	239	IF( jk <= nk_rnf(ji,jj) ) THEN
[10743]	240	ze3t_f(ji,jj,jk) = ze3t_f(ji,jj,jk) - zcoef * ( - rnf_b(ji,jj) + rnf(ji,jj) ) &
	241	& * ( pe3t(ji,jj,jk) / h_rnf(ji,jj) ) * tmask(ji,jj,jk)
[9361]	242	ENDIF
[9023]	243	ENDDO
	244	ENDDO
[9361]	245	ENDDO
	246	ELSE
[10743]	247	ze3t_f(:,:,1) = ze3t_f(:,:,1) - zcoef * ( -rnf_b(:,:) + rnf(:,:))*tmask(:,:,1)
[9361]	248	ENDIF
	249	END IF
	250
	251	IF ( ln_isf ) THEN ! if ice shelf melting
	252	DO jk = 1, jpkm1 ! Deal with isf separetely, as can be through depth too
[6140]	253	DO jj = 1, jpj
	254	DO ji = 1, jpi
[10349]	255	IF( misfkt(ji,jj) <=jk .and. jk < misfkb(ji,jj) ) THEN
[10743]	256	ze3t_f(ji,jj,jk) = ze3t_f(ji,jj,jk) - zcoef * ( fwfisf_b(ji,jj) - fwfisf(ji,jj) ) &
	257	& * ( pe3t(ji,jj,jk) * r1_hisf_tbl(ji,jj) ) * tmask(ji,jj,jk)
[10349]	258	ELSEIF ( jk==misfkb(ji,jj) ) THEN
[10743]	259	ze3t_f(ji,jj,jk) = ze3t_f(ji,jj,jk) - zcoef * ( fwfisf_b(ji,jj) - fwfisf(ji,jj) ) &
	260	& * ( pe3t(ji,jj,jk) * r1_hisf_tbl(ji,jj) ) * ralpha(ji,jj) * tmask(ji,jj,jk)
[9361]	261	ENDIF
[5643]	262	END DO
	263	END DO
[9361]	264	END DO
[9023]	265	END IF
[2528]	266	!
[10743]	267	pe3t(:,:,1:jpkm1) = ze3t_f(:,:,1:jpkm1) ! filtered scale factor at T-points
	268	!
[6140]	269	IF( ln_dynadv_vec ) THEN ! Asselin filter applied on velocity
	270	! Before filtered scale factor at (u/v)-points
[10743]	271	CALL dom_vvl_interpol( pe3t(:,:,:), pe3u(:,:,:), 'U' )
	272	CALL dom_vvl_interpol( pe3t(:,:,:), pe3v(:,:,:), 'V' )
[4292]	273	DO jk = 1, jpkm1
	274	DO jj = 1, jpj
[2528]	275	DO ji = 1, jpi
[10743]	276	puu(ji,jj,jk) = puu(ji,jj,jk) + atfp * ( uu(ji,jj,jk,kNm1) - 2._wp * puu(ji,jj,jk) + uu(ji,jj,jk,kNp1) )
	277	pvv(ji,jj,jk) = pvv(ji,jj,jk) + atfp * ( vv(ji,jj,jk,kNm1) - 2._wp * pvv(ji,jj,jk) + vv(ji,jj,jk,kNp1) )
[2528]	278	!
[10743]	279	!! TO BE DELETED
	280	!!$ ub(ji,jj,jk) = zuf ! ub <-- filtered velocity
	281	!!$ vb(ji,jj,jk) = zvf
	282	!!$ un(ji,jj,jk) = ua(ji,jj,jk) ! un <-- ua
	283	!!$ vn(ji,jj,jk) = va(ji,jj,jk)
	284	!! TO BE DELETED
[2528]	285	END DO
	286	END DO
	287	END DO
	288	!
[6140]	289	ELSE ! Asselin filter applied on thickness weighted velocity
	290	!
[9019]	291	ALLOCATE( ze3u_f(jpi,jpj,jpk) , ze3v_f(jpi,jpj,jpk) )
[10743]	292	! Now filtered scale factor at (u/v)-points stored in ze3u_f, ze3v_f
	293	CALL dom_vvl_interpol( pe3t(:,:,:), ze3u_f, 'U' )
	294	CALL dom_vvl_interpol( pe3t(:,:,:), ze3v_f, 'V' )
[4292]	295	DO jk = 1, jpkm1
	296	DO jj = 1, jpj
[4312]	297	DO ji = 1, jpi
[10743]	298	zue3a = e3u(ji,jj,jk,kNp1) * uu(ji,jj,jk,kNp1)
	299	zve3a = e3v(ji,jj,jk,kNp1) * vv(ji,jj,jk,kNp1)
	300	zue3n = pe3u(ji,jj,jk) * puu(ji,jj,jk)
	301	zve3n = pe3v(ji,jj,jk) * pvv(ji,jj,jk)
	302	zue3b = e3u(ji,jj,jk,kNm1) * uu(ji,jj,jk,kNm1)
	303	zve3b = e3v(ji,jj,jk,kNm1) * vv(ji,jj,jk,kNm1)
[2528]	304	!
[10743]	305	puu(ji,jj,jk) = ( zue3n + atfp * ( zue3b - 2._wp * zue3n + zue3a ) ) / ze3u_f(ji,jj,jk)
	306	pvv(ji,jj,jk) = ( zve3n + atfp * ( zve3b - 2._wp * zve3n + zve3a ) ) / ze3v_f(ji,jj,jk)
[2528]	307	!
[10743]	308	!! TO BE DELETED
	309	!!$ ub(ji,jj,jk) = zuf ! ub <-- filtered velocity
	310	!!$ vb(ji,jj,jk) = zvf
	311	!!$ un(ji,jj,jk) = ua(ji,jj,jk) ! un <-- ua
	312	!!$ vn(ji,jj,jk) = va(ji,jj,jk)
	313	!! TO BE DELETED
[2528]	314	END DO
	315	END DO
	316	END DO
[10743]	317	pe3u(:,:,1:jpkm1) = ze3u_f(:,:,1:jpkm1)
	318	pe3v(:,:,1:jpkm1) = ze3v_f(:,:,1:jpkm1)
[6140]	319	!
[9019]	320	DEALLOCATE( ze3u_f , ze3v_f )
[2528]	321	ENDIF
	322	!
[10743]	323	DEALLOCATE( ze3t_f )
[3]	324	ENDIF
[2528]	325	!
[6140]	326	IF( ln_dynspg_ts .AND. ln_bt_fw ) THEN
[10743]	327	! Revert filtered "now" velocities to time split estimate
[4312]	328	! Doing it here also means that asselin filter contribution is removed
[10743]	329	zue(:,:) = pe3u(:,:,1) * puu(:,:,1) * umask(:,:,1)
	330	zve(:,:) = pe3v(:,:,1) * pvv(:,:,1) * vmask(:,:,1)
[4990]	331	DO jk = 2, jpkm1
[10743]	332	zue(:,:) = zue(:,:) + pe3u(:,:,jk) * puu(:,:,jk) * umask(:,:,jk)
	333	zve(:,:) = zve(:,:) + pe3v(:,:,jk) * pvv(:,:,jk) * vmask(:,:,jk)
[4370]	334	END DO
	335	DO jk = 1, jpkm1
[10743]	336	puu(:,:,jk) = puu(:,:,jk) - (zue(:,:) * r1_hu_n(:,:) - un_b(:,:)) * umask(:,:,jk)
	337	pvv(:,:,jk) = pvv(:,:,jk) - (zve(:,:) * r1_hv_n(:,:) - vn_b(:,:)) * vmask(:,:,jk)
[4292]	338	END DO
	339	ENDIF
	340	!
	341	ENDIF ! neuler =/0
[4354]	342	!
	343	! Set "now" and "before" barotropic velocities for next time step:
	344	! JC: Would be more clever to swap variables than to make a full vertical
	345	! integration
	346	!
[10743]	347	! DS IMMERSE :: This is very confusing as it stands. But should
	348	! hopefully be simpler when we do the time-level swapping for the
	349	! external mode solution.
[4370]	350	!
[6140]	351	IF(.NOT.ln_linssh ) THEN
[10743]	352	hu_b(:,:) = pe3u(:,:,1) * umask(:,:,1)
	353	hv_b(:,:) = pe3v(:,:,1) * vmask(:,:,1)
[6140]	354	DO jk = 2, jpkm1
[10743]	355	hu_b(:,:) = hu_b(:,:) + pe3u(:,:,jk) * umask(:,:,jk)
	356	hv_b(:,:) = hv_b(:,:) + pe3v(:,:,jk) * vmask(:,:,jk)
[4354]	357	END DO
[7753]	358	r1_hu_b(:,:) = ssumask(:,:) / ( hu_b(:,:) + 1._wp - ssumask(:,:) )
	359	r1_hv_b(:,:) = ssvmask(:,:) / ( hv_b(:,:) + 1._wp - ssvmask(:,:) )
[4354]	360	ENDIF
	361	!
[10743]	362	un_b(:,:) = e3u(:,:,1,kNp1) * uu(:,:,1,kNp1) * umask(:,:,1)
	363	ub_b(:,:) = pe3u(:,:,1) * puu(:,:,1) * umask(:,:,1)
	364	vn_b(:,:) = e3v(:,:,1,kNp1) * vv(:,:,1,kNp1) * vmask(:,:,1)
	365	vb_b(:,:) = pe3v(:,:,1) * pvv(:,:,1) * vmask(:,:,1)
[6140]	366	DO jk = 2, jpkm1
[10743]	367	un_b(:,:) = un_b(:,:) + e3u(:,:,jk,kNp1) * uu(:,:,jk,kNp1) * umask(:,:,jk)
	368	ub_b(:,:) = ub_b(:,:) + pe3u(:,:,jk) * puu(:,:,jk) * umask(:,:,jk)
	369	vn_b(:,:) = vn_b(:,:) + e3v(:,:,jk,kNp1) * vv(:,:,jk,kNp1) * vmask(:,:,jk)
	370	vb_b(:,:) = vb_b(:,:) + pe3v(:,:,jk) * pvv(:,:,jk) * vmask(:,:,jk)
[4354]	371	END DO
[7753]	372	un_b(:,:) = un_b(:,:) * r1_hu_a(:,:)
	373	vn_b(:,:) = vn_b(:,:) * r1_hv_a(:,:)
	374	ub_b(:,:) = ub_b(:,:) * r1_hu_b(:,:)
	375	vb_b(:,:) = vb_b(:,:) * r1_hv_b(:,:)
[4354]	376	!
[6140]	377	IF( .NOT.ln_dynspg_ts ) THEN ! output the barotropic currents
	378	CALL iom_put( "ubar", un_b(:,:) )
	379	CALL iom_put( "vbar", vn_b(:,:) )
	380	ENDIF
[4990]	381	IF( l_trddyn ) THEN ! 3D output: asselin filter trends on momentum
[10743]	382	zua(:,:,:) = ( puu(:,:,:) - zua(:,:,:) ) * z1_2dt
	383	zva(:,:,:) = ( pvv(:,:,:) - zva(:,:,:) ) * z1_2dt
[4990]	384	CALL trd_dyn( zua, zva, jpdyn_atf, kt )
	385	ENDIF
	386	!
[10743]	387	IF(ln_ctl) CALL prt_ctl( tab3d_1=uu(:,:,:,kNp1), clinfo1=' nxt - uu(:,:,:,kNp1): ', mask1=umask, &
	388	& tab3d_2=vv(:,:,:,kNp1), clinfo2=' vv(:,:,:,kNp1): ' , mask2=vmask )
[6140]	389	!
[9019]	390	IF( ln_dynspg_ts ) DEALLOCATE( zue, zve )
	391	IF( l_trddyn ) DEALLOCATE( zua, zva )
	392	IF( ln_timing ) CALL timing_stop('dyn_nxt')
[2715]	393	!
[3]	394	END SUBROUTINE dyn_nxt
	395
[1502]	396	!!=========================================================================
[3]	397	END MODULE dynnxt

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