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domvvl.F90 in NEMO/branches/2019/dev_r11943_MERGE_2019/tests/VORTEX/MY_SRC – NEMO

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source: NEMO/branches/2019/dev_r11943_MERGE_2019/tests/VORTEX/MY_SRC/domvvl.F90 @ 12353

Last change on this file since 12353 was 12353, checked in by acc, 4 years ago
Branch 2019/dev_r11943_MERGE_2019. Additions to the do loop macro implementation: converted a few loops previously missed because they used jpi-1 instead of jpim1 etc.; changed internal macro names in do_loop_substitute.h90 to strings that are much more unlikely to appear in any future code elsewhere and removed the key_vectopt_loop option (and all related code) since the do loop macros have suppressed this option. These changes have been fully SETTE-tested and this branch should now be ready to go back to the trunk.
Property svn:keywords set to `Id`
File size: 57.1 KB

Rev	Line
[9067]	1	MODULE domvvl
	2	!!======================================================================
	3	!! * MODULE domvvl *
	4	!! Ocean :
	5	!!======================================================================
	6	!! History : 2.0 ! 2006-06 (B. Levier, L. Marie) original code
	7	!! 3.1 ! 2009-02 (G. Madec, M. Leclair, R. Benshila) pure z* coordinate
	8	!! 3.3 ! 2011-10 (M. Leclair) totally rewrote domvvl: vvl option includes z_star and z_tilde coordinates
	9	!! 3.6 ! 2014-11 (P. Mathiot) add ice shelf capability
[11949]	10	!! 4.1 ! 2019-08 (A. Coward, D. Storkey) rename dom_vvl_sf_swp -> dom_vvl_sf_update for new timestepping
[9067]	11	!!----------------------------------------------------------------------
	12
	13	!!----------------------------------------------------------------------
	14	!! dom_vvl_init : define initial vertical scale factors, depths and column thickness
	15	!! dom_vvl_sf_nxt : Compute next vertical scale factors
[11949]	16	!! dom_vvl_sf_update : Swap vertical scale factors and update the vertical grid
[9067]	17	!! dom_vvl_interpol : Interpolate vertical scale factors from one grid point to another
	18	!! dom_vvl_rst : read/write restart file
	19	!! dom_vvl_ctl : Check the vvl options
	20	!!----------------------------------------------------------------------
	21	USE oce ! ocean dynamics and tracers
	22	USE phycst ! physical constant
	23	USE dom_oce ! ocean space and time domain
	24	USE sbc_oce ! ocean surface boundary condition
	25	USE wet_dry ! wetting and drying
	26	USE usrdef_istate ! user defined initial state (wad only)
	27	USE restart ! ocean restart
	28	!
	29	USE in_out_manager ! I/O manager
	30	USE iom ! I/O manager library
	31	USE lib_mpp ! distributed memory computing library
	32	USE lbclnk ! ocean lateral boundary conditions (or mpp link)
	33	USE timing ! Timing
	34
	35	IMPLICIT NONE
	36	PRIVATE
	37
	38	PUBLIC dom_vvl_init ! called by domain.F90
[12150]	39	PUBLIC dom_vvl_zgr ! called by isfcpl.F90
[9067]	40	PUBLIC dom_vvl_sf_nxt ! called by step.F90
[11949]	41	PUBLIC dom_vvl_sf_update ! called by step.F90
[9067]	42	PUBLIC dom_vvl_interpol ! called by dynnxt.F90
	43
	44	! !!* Namelist nam_vvl
	45	LOGICAL , PUBLIC :: ln_vvl_zstar = .FALSE. ! zstar vertical coordinate
	46	LOGICAL , PUBLIC :: ln_vvl_ztilde = .FALSE. ! ztilde vertical coordinate
	47	LOGICAL , PUBLIC :: ln_vvl_layer = .FALSE. ! level vertical coordinate
	48	LOGICAL , PUBLIC :: ln_vvl_ztilde_as_zstar = .FALSE. ! ztilde vertical coordinate
	49	LOGICAL , PUBLIC :: ln_vvl_zstar_at_eqtor = .FALSE. ! ztilde vertical coordinate
	50	LOGICAL , PUBLIC :: ln_vvl_kepe = .FALSE. ! kinetic/potential energy transfer
	51	! ! conservation: not used yet
	52	REAL(wp) :: rn_ahe3 ! thickness diffusion coefficient
	53	REAL(wp) :: rn_rst_e3t ! ztilde to zstar restoration timescale [days]
	54	REAL(wp) :: rn_lf_cutoff ! cutoff frequency for low-pass filter [days]
	55	REAL(wp) :: rn_zdef_max ! maximum fractional e3t deformation
	56	LOGICAL , PUBLIC :: ln_vvl_dbg = .FALSE. ! debug control prints
	57
	58	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: un_td, vn_td ! thickness diffusion transport
	59	REAL(wp) , ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: hdiv_lf ! low frequency part of hz divergence
	60	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: tilde_e3t_b, tilde_e3t_n ! baroclinic scale factors
	61	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: tilde_e3t_a, dtilde_e3t_a ! baroclinic scale factors
	62	REAL(wp) , ALLOCATABLE, SAVE, DIMENSION(:,:) :: frq_rst_e3t ! retoring period for scale factors
	63	REAL(wp) , ALLOCATABLE, SAVE, DIMENSION(:,:) :: frq_rst_hdv ! retoring period for low freq. divergence
	64
	65	!!----------------------------------------------------------------------
[10073]	66	!! NEMO/OCE 4.0 , NEMO Consortium (2018)
[10074]	67	!! $Id$
[10073]	68	!! Software governed by the CeCILL license (see ./LICENSE)
[9067]	69	!!----------------------------------------------------------------------
	70	CONTAINS
	71
	72	INTEGER FUNCTION dom_vvl_alloc()
	73	!!----------------------------------------------------------------------
	74	!! * FUNCTION dom_vvl_alloc *
	75	!!----------------------------------------------------------------------
	76	IF( ln_vvl_zstar ) dom_vvl_alloc = 0
	77	IF( ln_vvl_ztilde .OR. ln_vvl_layer ) THEN
	78	ALLOCATE( tilde_e3t_b(jpi,jpj,jpk) , tilde_e3t_n(jpi,jpj,jpk) , tilde_e3t_a(jpi,jpj,jpk) , &
	79	& dtilde_e3t_a(jpi,jpj,jpk) , un_td (jpi,jpj,jpk) , vn_td (jpi,jpj,jpk) , &
	80	& STAT = dom_vvl_alloc )
[10425]	81	CALL mpp_sum ( 'domvvl', dom_vvl_alloc )
	82	IF( dom_vvl_alloc /= 0 ) CALL ctl_stop( 'STOP', 'dom_vvl_alloc: failed to allocate arrays' )
[9067]	83	un_td = 0._wp
	84	vn_td = 0._wp
	85	ENDIF
	86	IF( ln_vvl_ztilde ) THEN
	87	ALLOCATE( frq_rst_e3t(jpi,jpj) , frq_rst_hdv(jpi,jpj) , hdiv_lf(jpi,jpj,jpk) , STAT= dom_vvl_alloc )
[10425]	88	CALL mpp_sum ( 'domvvl', dom_vvl_alloc )
	89	IF( dom_vvl_alloc /= 0 ) CALL ctl_stop( 'STOP', 'dom_vvl_alloc: failed to allocate arrays' )
[9067]	90	ENDIF
	91	!
	92	END FUNCTION dom_vvl_alloc
	93
	94
[11949]	95	SUBROUTINE dom_vvl_init( Kbb, Kmm, Kaa )
[9067]	96	!!----------------------------------------------------------------------
	97	!! * ROUTINE dom_vvl_init *
	98	!!
	99	!! ** Purpose : Initialization of all scale factors, depths
	100	!! and water column heights
	101	!!
	102	!! ** Method : - use restart file and/or initialize
	103	!! - interpolate scale factors
	104	!!
	105	!! ** Action : - e3t_(n/b) and tilde_e3t_(n/b)
[11949]	106	!! - Regrid: e3[u/v](:,:,:,Kmm)
	107	!! e3[u/v](:,:,:,Kmm)
	108	!! e3w(:,:,:,Kmm)
	109	!! e3[u/v]w_b
	110	!! e3[u/v]w_n
	111	!! gdept(:,:,:,Kmm), gdepw(:,:,:,Kmm) and gde3w
[9067]	112	!! - h(t/u/v)_0
	113	!! - frq_rst_e3t and frq_rst_hdv
	114	!!
	115	!! Reference : Leclair, M., and G. Madec, 2011, Ocean Modelling.
	116	!!----------------------------------------------------------------------
[11949]	117	INTEGER, INTENT(in) :: Kbb, Kmm, Kaa
	118	!
[9067]	119	IF(lwp) WRITE(numout,*)
	120	IF(lwp) WRITE(numout,*) 'dom_vvl_init : Variable volume activated'
	121	IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~'
	122	!
	123	CALL dom_vvl_ctl ! choose vertical coordinate (z_star, z_tilde or layer)
	124	!
	125	! ! Allocate module arrays
	126	IF( dom_vvl_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'dom_vvl_init : unable to allocate arrays' )
	127	!
	128	! ! Read or initialize e3t_(b/n), tilde_e3t_(b/n) and hdiv_lf
[11949]	129	CALL dom_vvl_rst( nit000, Kbb, Kmm, 'READ' )
	130	e3t(:,:,jpk,Kaa) = e3t_0(:,:,jpk) ! last level always inside the sea floor set one for all
[9067]	131	!
[12150]	132	CALL dom_vvl_zgr(Kbb, Kmm, Kaa) ! interpolation scale factor, depth and water column
	133	!
	134	END SUBROUTINE dom_vvl_init
	135	!
	136	SUBROUTINE dom_vvl_zgr(Kbb, Kmm, Kaa)
	137	!!----------------------------------------------------------------------
	138	!! * ROUTINE dom_vvl_init *
	139	!!
	140	!! ** Purpose : Interpolation of all scale factors,
	141	!! depths and water column heights
	142	!!
	143	!! ** Method : - interpolate scale factors
	144	!!
	145	!! ** Action : - e3t_(n/b) and tilde_e3t_(n/b)
	146	!! - Regrid: e3(u/v)_n
	147	!! e3(u/v)_b
	148	!! e3w_n
	149	!! e3(u/v)w_b
	150	!! e3(u/v)w_n
	151	!! gdept_n, gdepw_n and gde3w_n
	152	!! - h(t/u/v)_0
	153	!! - frq_rst_e3t and frq_rst_hdv
	154	!!
	155	!! Reference : Leclair, M., and G. Madec, 2011, Ocean Modelling.
	156	!!----------------------------------------------------------------------
	157	INTEGER, INTENT(in) :: Kbb, Kmm, Kaa
	158	!!----------------------------------------------------------------------
	159	INTEGER :: ji, jj, jk
	160	INTEGER :: ii0, ii1, ij0, ij1
	161	REAL(wp):: zcoef
	162	!!----------------------------------------------------------------------
	163	!
[9067]	164	! !== Set of all other vertical scale factors ==! (now and before)
	165	! ! Horizontal interpolation of e3t
[11949]	166	CALL dom_vvl_interpol( e3t(:,:,:,Kbb), e3u(:,:,:,Kbb), 'U' ) ! from T to U
	167	CALL dom_vvl_interpol( e3t(:,:,:,Kmm), e3u(:,:,:,Kmm), 'U' )
	168	CALL dom_vvl_interpol( e3t(:,:,:,Kbb), e3v(:,:,:,Kbb), 'V' ) ! from T to V
	169	CALL dom_vvl_interpol( e3t(:,:,:,Kmm), e3v(:,:,:,Kmm), 'V' )
	170	CALL dom_vvl_interpol( e3u(:,:,:,Kmm), e3f(:,:,:), 'F' ) ! from U to F
[9067]	171	! ! Vertical interpolation of e3t,u,v
[11949]	172	CALL dom_vvl_interpol( e3t(:,:,:,Kmm), e3w (:,:,:,Kmm), 'W' ) ! from T to W
	173	CALL dom_vvl_interpol( e3t(:,:,:,Kbb), e3w (:,:,:,Kbb), 'W' )
	174	CALL dom_vvl_interpol( e3u(:,:,:,Kmm), e3uw(:,:,:,Kmm), 'UW' ) ! from U to UW
	175	CALL dom_vvl_interpol( e3u(:,:,:,Kbb), e3uw(:,:,:,Kbb), 'UW' )
	176	CALL dom_vvl_interpol( e3v(:,:,:,Kmm), e3vw(:,:,:,Kmm), 'VW' ) ! from V to UW
	177	CALL dom_vvl_interpol( e3v(:,:,:,Kbb), e3vw(:,:,:,Kbb), 'VW' )
[9729]	178
	179	! We need to define e3[tuv]_a for AGRIF initialisation (should not be a problem for the restartability...)
[11949]	180	e3t(:,:,:,Kaa) = e3t(:,:,:,Kmm)
	181	e3u(:,:,:,Kaa) = e3u(:,:,:,Kmm)
	182	e3v(:,:,:,Kaa) = e3v(:,:,:,Kmm)
[9067]	183	!
	184	! !== depth of t and w-point ==! (set the isf depth as it is in the initial timestep)
[11949]	185	gdept(:,:,1,Kmm) = 0.5_wp * e3w(:,:,1,Kmm) ! reference to the ocean surface (used for MLD and light penetration)
	186	gdepw(:,:,1,Kmm) = 0.0_wp
	187	gde3w(:,:,1) = gdept(:,:,1,Kmm) - ssh(:,:,Kmm) ! reference to a common level z=0 for hpg
	188	gdept(:,:,1,Kbb) = 0.5_wp * e3w(:,:,1,Kbb)
	189	gdepw(:,:,1,Kbb) = 0.0_wp
[9067]	190	DO jk = 2, jpk ! vertical sum
	191	DO jj = 1,jpj
	192	DO ji = 1,jpi
	193	! zcoef = tmask - wmask ! 0 everywhere tmask = wmask, ie everywhere expect at jk = mikt
	194	! ! 1 everywhere from mbkt to mikt + 1 or 1 (if no isf)
	195	! ! 0.5 where jk = mikt
[11949]	196	!!gm ??????? BUG ? gdept(:,:,:,Kmm) as well as gde3w does not include the thickness of ISF ??
[9067]	197	zcoef = ( tmask(ji,jj,jk) - wmask(ji,jj,jk) )
[11949]	198	gdepw(ji,jj,jk,Kmm) = gdepw(ji,jj,jk-1,Kmm) + e3t(ji,jj,jk-1,Kmm)
	199	gdept(ji,jj,jk,Kmm) = zcoef * ( gdepw(ji,jj,jk ,Kmm) + 0.5 * e3w(ji,jj,jk,Kmm)) &
	200	& + (1-zcoef) * ( gdept(ji,jj,jk-1,Kmm) + e3w(ji,jj,jk,Kmm))
	201	gde3w(ji,jj,jk) = gdept(ji,jj,jk,Kmm) - ssh(ji,jj,Kmm)
	202	gdepw(ji,jj,jk,Kbb) = gdepw(ji,jj,jk-1,Kbb) + e3t(ji,jj,jk-1,Kbb)
	203	gdept(ji,jj,jk,Kbb) = zcoef * ( gdepw(ji,jj,jk ,Kbb) + 0.5 * e3w(ji,jj,jk,Kbb)) &
	204	& + (1-zcoef) * ( gdept(ji,jj,jk-1,Kbb) + e3w(ji,jj,jk,Kbb))
[9067]	205	END DO
	206	END DO
	207	END DO
	208	!
	209	! !== thickness of the water column !! (ocean portion only)
[11949]	210	ht(:,:) = e3t(:,:,1,Kmm) * tmask(:,:,1) !!gm BUG : this should be 1/2 * e3w(k=1) ....
	211	hu(:,:,Kbb) = e3u(:,:,1,Kbb) * umask(:,:,1)
	212	hu(:,:,Kmm) = e3u(:,:,1,Kmm) * umask(:,:,1)
	213	hv(:,:,Kbb) = e3v(:,:,1,Kbb) * vmask(:,:,1)
	214	hv(:,:,Kmm) = e3v(:,:,1,Kmm) * vmask(:,:,1)
[9067]	215	DO jk = 2, jpkm1
[11949]	216	ht(:,:) = ht(:,:) + e3t(:,:,jk,Kmm) * tmask(:,:,jk)
	217	hu(:,:,Kbb) = hu(:,:,Kbb) + e3u(:,:,jk,Kbb) * umask(:,:,jk)
	218	hu(:,:,Kmm) = hu(:,:,Kmm) + e3u(:,:,jk,Kmm) * umask(:,:,jk)
	219	hv(:,:,Kbb) = hv(:,:,Kbb) + e3v(:,:,jk,Kbb) * vmask(:,:,jk)
	220	hv(:,:,Kmm) = hv(:,:,Kmm) + e3v(:,:,jk,Kmm) * vmask(:,:,jk)
[9067]	221	END DO
	222	!
	223	! !== inverse of water column thickness ==! (u- and v- points)
[11949]	224	r1_hu(:,:,Kbb) = ssumask(:,:) / ( hu(:,:,Kbb) + 1._wp - ssumask(:,:) ) ! _i mask due to ISF
	225	r1_hu(:,:,Kmm) = ssumask(:,:) / ( hu(:,:,Kmm) + 1._wp - ssumask(:,:) )
	226	r1_hv(:,:,Kbb) = ssvmask(:,:) / ( hv(:,:,Kbb) + 1._wp - ssvmask(:,:) )
	227	r1_hv(:,:,Kmm) = ssvmask(:,:) / ( hv(:,:,Kmm) + 1._wp - ssvmask(:,:) )
[9067]	228
	229	! !== z_tilde coordinate case ==! (Restoring frequencies)
	230	IF( ln_vvl_ztilde ) THEN
	231	!!gm : idea: add here a READ in a file of custumized restoring frequency
	232	! ! Values in days provided via the namelist
	233	! ! use rsmall to avoid possible division by zero errors with faulty settings
	234	frq_rst_e3t(:,:) = 2._wp * rpi / ( MAX( rn_rst_e3t , rsmall ) * 86400.0_wp )
	235	frq_rst_hdv(:,:) = 2._wp * rpi / ( MAX( rn_lf_cutoff, rsmall ) * 86400.0_wp )
	236	!
	237	IF( ln_vvl_ztilde_as_zstar ) THEN ! z-star emulation using z-tile
	238	frq_rst_e3t(:,:) = 0._wp !Ignore namelist settings
	239	frq_rst_hdv(:,:) = 1._wp / rdt
	240	ENDIF
	241	IF ( ln_vvl_zstar_at_eqtor ) THEN ! use z-star in vicinity of the Equator
	242	DO jj = 1, jpj
	243	DO ji = 1, jpi
	244	!!gm case \|gphi\| >= 6 degrees is useless initialized just above by default
	245	IF( ABS(gphit(ji,jj)) >= 6.) THEN
	246	! values outside the equatorial band and transition zone (ztilde)
	247	frq_rst_e3t(ji,jj) = 2.0_wp * rpi / ( MAX( rn_rst_e3t , rsmall ) * 86400.e0_wp )
	248	frq_rst_hdv(ji,jj) = 2.0_wp * rpi / ( MAX( rn_lf_cutoff, rsmall ) * 86400.e0_wp )
	249	ELSEIF( ABS(gphit(ji,jj)) <= 2.5) THEN ! Equator strip ==> z-star
	250	! values inside the equatorial band (ztilde as zstar)
	251	frq_rst_e3t(ji,jj) = 0.0_wp
	252	frq_rst_hdv(ji,jj) = 1.0_wp / rdt
	253	ELSE ! transition band (2.5 to 6 degrees N/S)
	254	! ! (linearly transition from z-tilde to z-star)
	255	frq_rst_e3t(ji,jj) = 0.0_wp + (frq_rst_e3t(ji,jj)-0.0_wp)*0.5_wp &
	256	& * ( 1.0_wp - COS( rad*(ABS(gphit(ji,jj))-2.5_wp) &
	257	& * 180._wp / 3.5_wp ) )
	258	frq_rst_hdv(ji,jj) = (1.0_wp / rdt) &
	259	& + ( frq_rst_hdv(ji,jj)-(1.e0_wp / rdt) )*0.5_wp &
	260	& * ( 1._wp - COS( rad*(ABS(gphit(ji,jj))-2.5_wp) &
	261	& * 180._wp / 3.5_wp ) )
	262	ENDIF
	263	END DO
	264	END DO
[10425]	265	IF( cn_cfg == "orca" .OR. cn_cfg == "ORCA" ) THEN
	266	IF( nn_cfg == 3 ) THEN ! ORCA2: Suppress ztilde in the Foxe Basin for ORCA2
	267	ii0 = 103 ; ii1 = 111
	268	ij0 = 128 ; ij1 = 135 ;
	269	frq_rst_e3t( mi0(ii0):mi1(ii1) , mj0(ij0):mj1(ij1) ) = 0.0_wp
	270	frq_rst_hdv( mi0(ii0):mi1(ii1) , mj0(ij0):mj1(ij1) ) = 1.e0_wp / rdt
	271	ENDIF
[9067]	272	ENDIF
	273	ENDIF
	274	ENDIF
	275	!
[9729]	276	IF(lwxios) THEN
	277	! define variables in restart file when writing with XIOS
	278	CALL iom_set_rstw_var_active('e3t_b')
	279	CALL iom_set_rstw_var_active('e3t_n')
	280	! ! ----------------------- !
	281	IF( ln_vvl_ztilde .OR. ln_vvl_layer ) THEN ! z_tilde and layer cases !
	282	! ! ----------------------- !
	283	CALL iom_set_rstw_var_active('tilde_e3t_b')
	284	CALL iom_set_rstw_var_active('tilde_e3t_n')
	285	END IF
	286	! ! -------------!
	287	IF( ln_vvl_ztilde ) THEN ! z_tilde case !
	288	! ! ------------ !
	289	CALL iom_set_rstw_var_active('hdiv_lf')
	290	ENDIF
	291	!
	292	ENDIF
	293	!
[12150]	294	END SUBROUTINE dom_vvl_zgr
[9067]	295
	296
[11949]	297	SUBROUTINE dom_vvl_sf_nxt( kt, Kbb, Kmm, Kaa, kcall )
[9067]	298	!!----------------------------------------------------------------------
	299	!! * ROUTINE dom_vvl_sf_nxt *
	300	!!
	301	!! ** Purpose : - compute the after scale factors used in tra_zdf, dynnxt,
	302	!! tranxt and dynspg routines
	303	!!
	304	!! ** Method : - z_star case: Repartition of ssh INCREMENT proportionnaly to the level thickness.
	305	!! - z_tilde_case: after scale factor increment =
	306	!! high frequency part of horizontal divergence
	307	!! + retsoring towards the background grid
	308	!! + thickness difusion
	309	!! Then repartition of ssh INCREMENT proportionnaly
	310	!! to the "baroclinic" level thickness.
	311	!!
	312	!! ** Action : - hdiv_lf : restoring towards full baroclinic divergence in z_tilde case
	313	!! - tilde_e3t_a: after increment of vertical scale factor
	314	!! in z_tilde case
	315	!! - e3(t/u/v)_a
	316	!!
	317	!! Reference : Leclair, M., and Madec, G. 2011, Ocean Modelling.
	318	!!----------------------------------------------------------------------
[11949]	319	INTEGER, INTENT( in ) :: kt ! time step
	320	INTEGER, INTENT( in ) :: Kbb, Kmm, Kaa ! time step
	321	INTEGER, INTENT( in ), OPTIONAL :: kcall ! optional argument indicating call sequence
[9067]	322	!
	323	INTEGER :: ji, jj, jk ! dummy loop indices
	324	INTEGER , DIMENSION(3) :: ijk_max, ijk_min ! temporary integers
	325	REAL(wp) :: z2dt, z_tmin, z_tmax ! local scalars
	326	LOGICAL :: ll_do_bclinic ! local logical
	327	REAL(wp), DIMENSION(jpi,jpj) :: zht, z_scale, zwu, zwv, zhdiv
	328	REAL(wp), DIMENSION(jpi,jpj,jpk) :: ze3t
	329	!!----------------------------------------------------------------------
	330	!
	331	IF( ln_linssh ) RETURN ! No calculation in linear free surface
	332	!
	333	IF( ln_timing ) CALL timing_start('dom_vvl_sf_nxt')
	334	!
	335	IF( kt == nit000 ) THEN
	336	IF(lwp) WRITE(numout,*)
	337	IF(lwp) WRITE(numout,*) 'dom_vvl_sf_nxt : compute after scale factors'
	338	IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~~~'
	339	ENDIF
	340
	341	ll_do_bclinic = .TRUE.
	342	IF( PRESENT(kcall) ) THEN
	343	IF( kcall == 2 .AND. ln_vvl_ztilde ) ll_do_bclinic = .FALSE.
	344	ENDIF
	345
	346	! ******************************* !
	347	! After acale factors at t-points !
	348	! ******************************* !
	349	! ! --------------------------------------------- !
	350	! ! z_star coordinate and barotropic z-tilde part !
	351	! ! --------------------------------------------- !
	352	!
[11949]	353	z_scale(:,:) = ( ssh(:,:,Kaa) - ssh(:,:,Kbb) ) * ssmask(:,:) / ( ht_0(:,:) + ssh(:,:,Kmm) + 1. - ssmask(:,:) )
[9067]	354	DO jk = 1, jpkm1
[11949]	355	! formally this is the same as e3t(:,:,:,Kaa) = e3t_0*(1+ssha/ht_0)
	356	e3t(:,:,jk,Kaa) = e3t(:,:,jk,Kbb) + e3t(:,:,jk,Kmm) * z_scale(:,:) * tmask(:,:,jk)
[9067]	357	END DO
	358	!
	359	IF( ln_vvl_ztilde .OR. ln_vvl_layer .AND. ll_do_bclinic ) THEN ! z_tilde or layer coordinate !
	360	! ! ------baroclinic part------ !
	361	! I - initialization
	362	! ==================
	363
	364	! 1 - barotropic divergence
	365	! -------------------------
	366	zhdiv(:,:) = 0._wp
	367	zht(:,:) = 0._wp
	368	DO jk = 1, jpkm1
[11949]	369	zhdiv(:,:) = zhdiv(:,:) + e3t(:,:,jk,Kmm) * hdiv(:,:,jk)
	370	zht (:,:) = zht (:,:) + e3t(:,:,jk,Kmm) * tmask(:,:,jk)
[9067]	371	END DO
	372	zhdiv(:,:) = zhdiv(:,:) / ( zht(:,:) + 1. - tmask_i(:,:) )
	373
	374	! 2 - Low frequency baroclinic horizontal divergence (z-tilde case only)
	375	! --------------------------------------------------
	376	IF( ln_vvl_ztilde ) THEN
	377	IF( kt > nit000 ) THEN
	378	DO jk = 1, jpkm1
	379	hdiv_lf(:,:,jk) = hdiv_lf(:,:,jk) - rdt * frq_rst_hdv(:,:) &
[11949]	380	& * ( hdiv_lf(:,:,jk) - e3t(:,:,jk,Kmm) * ( hdiv(:,:,jk) - zhdiv(:,:) ) )
[9067]	381	END DO
	382	ENDIF
	383	ENDIF
	384
	385	! II - after z_tilde increments of vertical scale factors
	386	! =======================================================
	387	tilde_e3t_a(:,:,:) = 0._wp ! tilde_e3t_a used to store tendency terms
	388
	389	! 1 - High frequency divergence term
	390	! ----------------------------------
	391	IF( ln_vvl_ztilde ) THEN ! z_tilde case
	392	DO jk = 1, jpkm1
[11949]	393	tilde_e3t_a(:,:,jk) = tilde_e3t_a(:,:,jk) - ( e3t(:,:,jk,Kmm) * ( hdiv(:,:,jk) - zhdiv(:,:) ) - hdiv_lf(:,:,jk) )
[9067]	394	END DO
	395	ELSE ! layer case
	396	DO jk = 1, jpkm1
[11949]	397	tilde_e3t_a(:,:,jk) = tilde_e3t_a(:,:,jk) - e3t(:,:,jk,Kmm) * ( hdiv(:,:,jk) - zhdiv(:,:) ) * tmask(:,:,jk)
[9067]	398	END DO
	399	ENDIF
	400
	401	! 2 - Restoring term (z-tilde case only)
	402	! ------------------
	403	IF( ln_vvl_ztilde ) THEN
	404	DO jk = 1, jpk
	405	tilde_e3t_a(:,:,jk) = tilde_e3t_a(:,:,jk) - frq_rst_e3t(:,:) * tilde_e3t_b(:,:,jk)
	406	END DO
	407	ENDIF
	408
	409	! 3 - Thickness diffusion term
	410	! ----------------------------
	411	zwu(:,:) = 0._wp
	412	zwv(:,:) = 0._wp
	413	DO jk = 1, jpkm1 ! a - first derivative: diffusive fluxes
	414	DO jj = 1, jpjm1
[12353]	415	DO ji = 1, jpim1 ! vector opt.
[9067]	416	un_td(ji,jj,jk) = rn_ahe3 * umask(ji,jj,jk) * e2_e1u(ji,jj) &
	417	& * ( tilde_e3t_b(ji,jj,jk) - tilde_e3t_b(ji+1,jj ,jk) )
	418	vn_td(ji,jj,jk) = rn_ahe3 * vmask(ji,jj,jk) * e1_e2v(ji,jj) &
	419	& * ( tilde_e3t_b(ji,jj,jk) - tilde_e3t_b(ji ,jj+1,jk) )
	420	zwu(ji,jj) = zwu(ji,jj) + un_td(ji,jj,jk)
	421	zwv(ji,jj) = zwv(ji,jj) + vn_td(ji,jj,jk)
	422	END DO
	423	END DO
	424	END DO
	425	DO jj = 1, jpj ! b - correction for last oceanic u-v points
	426	DO ji = 1, jpi
	427	un_td(ji,jj,mbku(ji,jj)) = un_td(ji,jj,mbku(ji,jj)) - zwu(ji,jj)
	428	vn_td(ji,jj,mbkv(ji,jj)) = vn_td(ji,jj,mbkv(ji,jj)) - zwv(ji,jj)
	429	END DO
	430	END DO
	431	DO jk = 1, jpkm1 ! c - second derivative: divergence of diffusive fluxes
	432	DO jj = 2, jpjm1
[12353]	433	DO ji = 2, jpim1 ! vector opt.
[9067]	434	tilde_e3t_a(ji,jj,jk) = tilde_e3t_a(ji,jj,jk) + ( un_td(ji-1,jj ,jk) - un_td(ji,jj,jk) &
	435	& + vn_td(ji ,jj-1,jk) - vn_td(ji,jj,jk) &
	436	& ) * r1_e1e2t(ji,jj)
	437	END DO
	438	END DO
	439	END DO
	440	! ! d - thickness diffusion transport: boundary conditions
	441	! (stored for tracer advction and continuity equation)
[10425]	442	CALL lbc_lnk_multi( 'domvvl', un_td , 'U' , -1._wp, vn_td , 'V' , -1._wp)
[9067]	443
	444	! 4 - Time stepping of baroclinic scale factors
	445	! ---------------------------------------------
	446	! Leapfrog time stepping
	447	! ~~~~~~~~~~~~~~~~~~~~~~
	448	IF( neuler == 0 .AND. kt == nit000 ) THEN
	449	z2dt = rdt
	450	ELSE
	451	z2dt = 2.0_wp * rdt
	452	ENDIF
[10425]	453	CALL lbc_lnk( 'domvvl', tilde_e3t_a(:,:,:), 'T', 1._wp )
[9067]	454	tilde_e3t_a(:,:,:) = tilde_e3t_b(:,:,:) + z2dt * tmask(:,:,:) * tilde_e3t_a(:,:,:)
	455
	456	! Maximum deformation control
	457	! ~~~~~~~~~~~~~~~~~~~~~~~~~~~
	458	ze3t(:,:,jpk) = 0._wp
	459	DO jk = 1, jpkm1
	460	ze3t(:,:,jk) = tilde_e3t_a(:,:,jk) / e3t_0(:,:,jk) * tmask(:,:,jk) * tmask_i(:,:)
	461	END DO
	462	z_tmax = MAXVAL( ze3t(:,:,:) )
[10425]	463	CALL mpp_max( 'domvvl', z_tmax ) ! max over the global domain
[9067]	464	z_tmin = MINVAL( ze3t(:,:,:) )
[10425]	465	CALL mpp_min( 'domvvl', z_tmin ) ! min over the global domain
[9067]	466	! - ML - test: for the moment, stop simulation for too large e3_t variations
	467	IF( ( z_tmax > rn_zdef_max ) .OR. ( z_tmin < - rn_zdef_max ) ) THEN
	468	IF( lk_mpp ) THEN
[10425]	469	CALL mpp_maxloc( 'domvvl', ze3t, tmask, z_tmax, ijk_max )
	470	CALL mpp_minloc( 'domvvl', ze3t, tmask, z_tmin, ijk_min )
[9067]	471	ELSE
	472	ijk_max = MAXLOC( ze3t(:,:,:) )
	473	ijk_max(1) = ijk_max(1) + nimpp - 1
	474	ijk_max(2) = ijk_max(2) + njmpp - 1
	475	ijk_min = MINLOC( ze3t(:,:,:) )
	476	ijk_min(1) = ijk_min(1) + nimpp - 1
	477	ijk_min(2) = ijk_min(2) + njmpp - 1
	478	ENDIF
	479	IF (lwp) THEN
	480	WRITE(numout, *) 'MAX( tilde_e3t_a(:,:,:) / e3t_0(:,:,:) ) =', z_tmax
	481	WRITE(numout, *) 'at i, j, k=', ijk_max
	482	WRITE(numout, *) 'MIN( tilde_e3t_a(:,:,:) / e3t_0(:,:,:) ) =', z_tmin
	483	WRITE(numout, *) 'at i, j, k=', ijk_min
[10425]	484	CALL ctl_stop( 'STOP', 'MAX( ABS( tilde_e3t_a(:,:,: ) ) / e3t_0(:,:,:) ) too high')
[9067]	485	ENDIF
	486	ENDIF
	487	! - ML - end test
	488	! - ML - Imposing these limits will cause a baroclinicity error which is corrected for below
	489	tilde_e3t_a(:,:,:) = MIN( tilde_e3t_a(:,:,:), rn_zdef_max * e3t_0(:,:,:) )
	490	tilde_e3t_a(:,:,:) = MAX( tilde_e3t_a(:,:,:), - rn_zdef_max * e3t_0(:,:,:) )
	491
	492	!
	493	! "tilda" change in the after scale factor
	494	! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	495	DO jk = 1, jpkm1
	496	dtilde_e3t_a(:,:,jk) = tilde_e3t_a(:,:,jk) - tilde_e3t_b(:,:,jk)
	497	END DO
	498	! III - Barotropic repartition of the sea surface height over the baroclinic profile
	499	! ==================================================================================
	500	! add ( ssh increment + "baroclinicity error" ) proportionly to e3t(n)
	501	! - ML - baroclinicity error should be better treated in the future
	502	! i.e. locally and not spread over the water column.
	503	! (keep in mind that the idea is to reduce Eulerian velocity as much as possible)
	504	zht(:,:) = 0.
	505	DO jk = 1, jpkm1
	506	zht(:,:) = zht(:,:) + tilde_e3t_a(:,:,jk) * tmask(:,:,jk)
	507	END DO
[11949]	508	z_scale(:,:) = - zht(:,:) / ( ht_0(:,:) + ssh(:,:,Kmm) + 1. - ssmask(:,:) )
[9067]	509	DO jk = 1, jpkm1
[11949]	510	dtilde_e3t_a(:,:,jk) = dtilde_e3t_a(:,:,jk) + e3t(:,:,jk,Kmm) * z_scale(:,:) * tmask(:,:,jk)
[9067]	511	END DO
	512
	513	ENDIF
	514
	515	IF( ln_vvl_ztilde .OR. ln_vvl_layer ) THEN ! z_tilde or layer coordinate !
	516	! ! ---baroclinic part--------- !
	517	DO jk = 1, jpkm1
[11949]	518	e3t(:,:,jk,Kaa) = e3t(:,:,jk,Kaa) + dtilde_e3t_a(:,:,jk) * tmask(:,:,jk)
[9067]	519	END DO
	520	ENDIF
	521
	522	IF( ln_vvl_dbg .AND. .NOT. ll_do_bclinic ) THEN ! - ML - test: control prints for debuging
	523	!
	524	IF( lwp ) WRITE(numout, *) 'kt =', kt
	525	IF ( ln_vvl_ztilde .OR. ln_vvl_layer ) THEN
	526	z_tmax = MAXVAL( tmask(:,:,1) * tmask_i(:,:) * ABS( zht(:,:) ) )
[10425]	527	CALL mpp_max( 'domvvl', z_tmax ) ! max over the global domain
[9067]	528	IF( lwp ) WRITE(numout, *) kt,' MAXVAL(abs(SUM(tilde_e3t_a))) =', z_tmax
	529	END IF
	530	!
	531	zht(:,:) = 0.0_wp
	532	DO jk = 1, jpkm1
[11949]	533	zht(:,:) = zht(:,:) + e3t(:,:,jk,Kmm) * tmask(:,:,jk)
[9067]	534	END DO
[11949]	535	z_tmax = MAXVAL( tmask(:,:,1) * tmask_i(:,:) * ABS( ht_0(:,:) + ssh(:,:,Kmm) - zht(:,:) ) )
[10425]	536	CALL mpp_max( 'domvvl', z_tmax ) ! max over the global domain
[11949]	537	IF( lwp ) WRITE(numout, *) kt,' MAXVAL(abs(ht_0+sshn-SUM(e3t(:,:,:,Kmm)))) =', z_tmax
[9067]	538	!
	539	zht(:,:) = 0.0_wp
	540	DO jk = 1, jpkm1
[11949]	541	zht(:,:) = zht(:,:) + e3t(:,:,jk,Kaa) * tmask(:,:,jk)
[9067]	542	END DO
[11949]	543	z_tmax = MAXVAL( tmask(:,:,1) * tmask_i(:,:) * ABS( ht_0(:,:) + ssh(:,:,Kaa) - zht(:,:) ) )
[10425]	544	CALL mpp_max( 'domvvl', z_tmax ) ! max over the global domain
[11949]	545	IF( lwp ) WRITE(numout, *) kt,' MAXVAL(abs(ht_0+ssha-SUM(e3t(:,:,:,Kaa)))) =', z_tmax
[9067]	546	!
	547	zht(:,:) = 0.0_wp
	548	DO jk = 1, jpkm1
[11949]	549	zht(:,:) = zht(:,:) + e3t(:,:,jk,Kbb) * tmask(:,:,jk)
[9067]	550	END DO
[11949]	551	z_tmax = MAXVAL( tmask(:,:,1) * tmask_i(:,:) * ABS( ht_0(:,:) + ssh(:,:,Kbb) - zht(:,:) ) )
[10425]	552	CALL mpp_max( 'domvvl', z_tmax ) ! max over the global domain
[11949]	553	IF( lwp ) WRITE(numout, *) kt,' MAXVAL(abs(ht_0+sshb-SUM(e3t(:,:,:,Kbb)))) =', z_tmax
[9067]	554	!
[11949]	555	z_tmax = MAXVAL( tmask(:,:,1) * ABS( ssh(:,:,Kbb) ) )
[10425]	556	CALL mpp_max( 'domvvl', z_tmax ) ! max over the global domain
[11949]	557	IF( lwp ) WRITE(numout, *) kt,' MAXVAL(abs(ssh(:,:,Kbb)))) =', z_tmax
[9067]	558	!
[11949]	559	z_tmax = MAXVAL( tmask(:,:,1) * ABS( ssh(:,:,Kmm) ) )
[10425]	560	CALL mpp_max( 'domvvl', z_tmax ) ! max over the global domain
[11949]	561	IF( lwp ) WRITE(numout, *) kt,' MAXVAL(abs(ssh(:,:,Kmm)))) =', z_tmax
[9067]	562	!
[11949]	563	z_tmax = MAXVAL( tmask(:,:,1) * ABS( ssh(:,:,Kaa) ) )
[10425]	564	CALL mpp_max( 'domvvl', z_tmax ) ! max over the global domain
[11949]	565	IF( lwp ) WRITE(numout, *) kt,' MAXVAL(abs(ssh(:,:,Kaa)))) =', z_tmax
[9067]	566	END IF
	567
	568	! *********************************** !
	569	! After scale factors at u- v- points !
	570	! *********************************** !
	571
[11949]	572	CALL dom_vvl_interpol( e3t(:,:,:,Kaa), e3u(:,:,:,Kaa), 'U' )
	573	CALL dom_vvl_interpol( e3t(:,:,:,Kaa), e3v(:,:,:,Kaa), 'V' )
[9067]	574
	575	! *********************************** !
	576	! After depths at u- v points !
	577	! *********************************** !
	578
[11949]	579	hu(:,:,Kaa) = e3u(:,:,1,Kaa) * umask(:,:,1)
	580	hv(:,:,Kaa) = e3v(:,:,1,Kaa) * vmask(:,:,1)
[9067]	581	DO jk = 2, jpkm1
[11949]	582	hu(:,:,Kaa) = hu(:,:,Kaa) + e3u(:,:,jk,Kaa) * umask(:,:,jk)
	583	hv(:,:,Kaa) = hv(:,:,Kaa) + e3v(:,:,jk,Kaa) * vmask(:,:,jk)
[9067]	584	END DO
	585	! ! Inverse of the local depth
	586	!!gm BUG ? don't understand the use of umask_i here .....
[11949]	587	r1_hu(:,:,Kaa) = ssumask(:,:) / ( hu(:,:,Kaa) + 1._wp - ssumask(:,:) )
	588	r1_hv(:,:,Kaa) = ssvmask(:,:) / ( hv(:,:,Kaa) + 1._wp - ssvmask(:,:) )
[9067]	589	!
	590	IF( ln_timing ) CALL timing_stop('dom_vvl_sf_nxt')
	591	!
	592	END SUBROUTINE dom_vvl_sf_nxt
	593
	594
[11949]	595	SUBROUTINE dom_vvl_sf_update( kt, Kbb, Kmm, Kaa )
[9067]	596	!!----------------------------------------------------------------------
[11949]	597	!! * ROUTINE dom_vvl_sf_update *
[9067]	598	!!
[11949]	599	!! ** Purpose : for z tilde case: compute time filter and swap of scale factors
[9067]	600	!! compute all depths and related variables for next time step
	601	!! write outputs and restart file
	602	!!
[11949]	603	!! ** Method : - swap of e3t with trick for volume/tracer conservation (ONLY FOR Z TILDE CASE)
[9067]	604	!! - reconstruct scale factor at other grid points (interpolate)
	605	!! - recompute depths and water height fields
	606	!!
[11949]	607	!! ** Action : - tilde_e3t_(b/n) ready for next time step
[9067]	608	!! - Recompute:
	609	!! e3(u/v)_b
[11949]	610	!! e3w(:,:,:,Kmm)
[9067]	611	!! e3(u/v)w_b
	612	!! e3(u/v)w_n
[11949]	613	!! gdept(:,:,:,Kmm), gdepw(:,:,:,Kmm) and gde3w
[9067]	614	!! h(u/v) and h(u/v)r
	615	!!
	616	!! Reference : Leclair, M., and G. Madec, 2009, Ocean Modelling.
	617	!! Leclair, M., and G. Madec, 2011, Ocean Modelling.
	618	!!----------------------------------------------------------------------
[11949]	619	INTEGER, INTENT( in ) :: kt ! time step
	620	INTEGER, INTENT( in ) :: Kbb, Kmm, Kaa ! time level indices
[9067]	621	!
	622	INTEGER :: ji, jj, jk ! dummy loop indices
	623	REAL(wp) :: zcoef ! local scalar
	624	!!----------------------------------------------------------------------
	625	!
	626	IF( ln_linssh ) RETURN ! No calculation in linear free surface
	627	!
[11949]	628	IF( ln_timing ) CALL timing_start('dom_vvl_sf_update')
[9067]	629	!
	630	IF( kt == nit000 ) THEN
	631	IF(lwp) WRITE(numout,*)
[11949]	632	IF(lwp) WRITE(numout,*) 'dom_vvl_sf_update : - interpolate scale factors and compute depths for next time step'
	633	IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~~~~~~'
[9067]	634	ENDIF
	635	!
	636	! Time filter and swap of scale factors
	637	! =====================================
	638	! - ML - e3(t/u/v)_b are allready computed in dynnxt.
	639	IF( ln_vvl_ztilde .OR. ln_vvl_layer ) THEN
	640	IF( neuler == 0 .AND. kt == nit000 ) THEN
	641	tilde_e3t_b(:,:,:) = tilde_e3t_n(:,:,:)
	642	ELSE
	643	tilde_e3t_b(:,:,:) = tilde_e3t_n(:,:,:) &
	644	& + atfp * ( tilde_e3t_b(:,:,:) - 2.0_wp * tilde_e3t_n(:,:,:) + tilde_e3t_a(:,:,:) )
	645	ENDIF
	646	tilde_e3t_n(:,:,:) = tilde_e3t_a(:,:,:)
	647	ENDIF
	648
	649	! Compute all missing vertical scale factor and depths
	650	! ====================================================
	651	! Horizontal scale factor interpolations
	652	! --------------------------------------
[11949]	653	! - ML - e3u(:,:,:,Kbb) and e3v(:,:,:,Kbb) are allready computed in dynnxt
	654	! - JC - hu(:,:,:,Kbb), hv(:,:,:,:,Kbb), hur_b, hvr_b also
[9067]	655
[11949]	656	CALL dom_vvl_interpol( e3u(:,:,:,Kmm), e3f(:,:,:), 'F' )
[9067]	657
	658	! Vertical scale factor interpolations
[11949]	659	CALL dom_vvl_interpol( e3t(:,:,:,Kmm), e3w(:,:,:,Kmm), 'W' )
	660	CALL dom_vvl_interpol( e3u(:,:,:,Kmm), e3uw(:,:,:,Kmm), 'UW' )
	661	CALL dom_vvl_interpol( e3v(:,:,:,Kmm), e3vw(:,:,:,Kmm), 'VW' )
	662	CALL dom_vvl_interpol( e3t(:,:,:,Kbb), e3w(:,:,:,Kbb), 'W' )
	663	CALL dom_vvl_interpol( e3u(:,:,:,Kbb), e3uw(:,:,:,Kbb), 'UW' )
	664	CALL dom_vvl_interpol( e3v(:,:,:,Kbb), e3vw(:,:,:,Kbb), 'VW' )
[9067]	665
	666	! t- and w- points depth (set the isf depth as it is in the initial step)
[11949]	667	gdept(:,:,1,Kmm) = 0.5_wp * e3w(:,:,1,Kmm)
	668	gdepw(:,:,1,Kmm) = 0.0_wp
	669	gde3w(:,:,1) = gdept(:,:,1,Kmm) - ssh(:,:,Kmm)
[9067]	670	DO jk = 2, jpk
	671	DO jj = 1,jpj
	672	DO ji = 1,jpi
	673	! zcoef = (tmask(ji,jj,jk) - wmask(ji,jj,jk)) ! 0 everywhere tmask = wmask, ie everywhere expect at jk = mikt
	674	! 1 for jk = mikt
	675	zcoef = (tmask(ji,jj,jk) - wmask(ji,jj,jk))
[11949]	676	gdepw(ji,jj,jk,Kmm) = gdepw(ji,jj,jk-1,Kmm) + e3t(ji,jj,jk-1,Kmm)
	677	gdept(ji,jj,jk,Kmm) = zcoef * ( gdepw(ji,jj,jk ,Kmm) + 0.5 * e3w(ji,jj,jk,Kmm) ) &
	678	& + (1-zcoef) * ( gdept(ji,jj,jk-1,Kmm) + e3w(ji,jj,jk,Kmm) )
	679	gde3w(ji,jj,jk) = gdept(ji,jj,jk,Kmm) - ssh(ji,jj,Kmm)
[9067]	680	END DO
	681	END DO
	682	END DO
	683
	684	! Local depth and Inverse of the local depth of the water
	685	! -------------------------------------------------------
	686	!
[11949]	687	ht(:,:) = e3t(:,:,1,Kmm) * tmask(:,:,1)
[9067]	688	DO jk = 2, jpkm1
[11949]	689	ht(:,:) = ht(:,:) + e3t(:,:,jk,Kmm) * tmask(:,:,jk)
[9067]	690	END DO
	691
	692	! write restart file
	693	! ==================
[11949]	694	IF( lrst_oce ) CALL dom_vvl_rst( kt, Kbb, Kmm, 'WRITE' )
[9067]	695	!
[11949]	696	IF( ln_timing ) CALL timing_stop('dom_vvl_sf_update')
[9067]	697	!
[11949]	698	END SUBROUTINE dom_vvl_sf_update
[9067]	699
	700
	701	SUBROUTINE dom_vvl_interpol( pe3_in, pe3_out, pout )
	702	!!---------------------------------------------------------------------
	703	!! * ROUTINE dom_vvl__interpol *
	704	!!
	705	!! ** Purpose : interpolate scale factors from one grid point to another
	706	!!
	707	!! ** Method : e3_out = e3_0 + interpolation(e3_in - e3_0)
	708	!! - horizontal interpolation: grid cell surface averaging
	709	!! - vertical interpolation: simple averaging
	710	!!----------------------------------------------------------------------
	711	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(in ) :: pe3_in ! input e3 to be interpolated
	712	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: pe3_out ! output interpolated e3
	713	CHARACTER(LEN=*) , INTENT(in ) :: pout ! grid point of out scale factors
	714	! ! = 'U', 'V', 'W, 'F', 'UW' or 'VW'
	715	!
	716	INTEGER :: ji, jj, jk ! dummy loop indices
	717	REAL(wp) :: zlnwd ! =1./0. when ln_wd_il = T/F
	718	!!----------------------------------------------------------------------
	719	!
	720	IF(ln_wd_il) THEN
	721	zlnwd = 1.0_wp
	722	ELSE
	723	zlnwd = 0.0_wp
	724	END IF
	725	!
	726	SELECT CASE ( pout ) !== type of interpolation ==!
	727	!
	728	CASE( 'U' ) !* from T- to U-point : hor. surface weighted mean
	729	DO jk = 1, jpk
	730	DO jj = 1, jpjm1
[12353]	731	DO ji = 1, jpim1 ! vector opt.
[9067]	732	pe3_out(ji,jj,jk) = 0.5_wp * ( umask(ji,jj,jk) * (1.0_wp - zlnwd) + zlnwd ) * r1_e1e2u(ji,jj) &
	733	& * ( e1e2t(ji ,jj) * ( pe3_in(ji ,jj,jk) - e3t_0(ji ,jj,jk) ) &
	734	& + e1e2t(ji+1,jj) * ( pe3_in(ji+1,jj,jk) - e3t_0(ji+1,jj,jk) ) )
	735	END DO
	736	END DO
	737	END DO
[10425]	738	CALL lbc_lnk( 'domvvl', pe3_out(:,:,:), 'U', 1._wp )
[9067]	739	pe3_out(:,:,:) = pe3_out(:,:,:) + e3u_0(:,:,:)
	740	!
	741	CASE( 'V' ) !* from T- to V-point : hor. surface weighted mean
	742	DO jk = 1, jpk
	743	DO jj = 1, jpjm1
[12353]	744	DO ji = 1, jpim1 ! vector opt.
[9067]	745	pe3_out(ji,jj,jk) = 0.5_wp * ( vmask(ji,jj,jk) * (1.0_wp - zlnwd) + zlnwd ) * r1_e1e2v(ji,jj) &
	746	& * ( e1e2t(ji,jj ) * ( pe3_in(ji,jj ,jk) - e3t_0(ji,jj ,jk) ) &
	747	& + e1e2t(ji,jj+1) * ( pe3_in(ji,jj+1,jk) - e3t_0(ji,jj+1,jk) ) )
	748	END DO
	749	END DO
	750	END DO
[10425]	751	CALL lbc_lnk( 'domvvl', pe3_out(:,:,:), 'V', 1._wp )
[9067]	752	pe3_out(:,:,:) = pe3_out(:,:,:) + e3v_0(:,:,:)
	753	!
	754	CASE( 'F' ) !* from U-point to F-point : hor. surface weighted mean
	755	DO jk = 1, jpk
	756	DO jj = 1, jpjm1
[12353]	757	DO ji = 1, jpim1 ! vector opt.
[9067]	758	pe3_out(ji,jj,jk) = 0.5_wp * ( umask(ji,jj,jk) * umask(ji,jj+1,jk) * (1.0_wp - zlnwd) + zlnwd ) &
	759	& * r1_e1e2f(ji,jj) &
	760	& * ( e1e2u(ji,jj ) * ( pe3_in(ji,jj ,jk) - e3u_0(ji,jj ,jk) ) &
	761	& + e1e2u(ji,jj+1) * ( pe3_in(ji,jj+1,jk) - e3u_0(ji,jj+1,jk) ) )
	762	END DO
	763	END DO
	764	END DO
[10425]	765	CALL lbc_lnk( 'domvvl', pe3_out(:,:,:), 'F', 1._wp )
[9067]	766	pe3_out(:,:,:) = pe3_out(:,:,:) + e3f_0(:,:,:)
	767	!
	768	CASE( 'W' ) !* from T- to W-point : vertical simple mean
	769	!
	770	pe3_out(:,:,1) = e3w_0(:,:,1) + pe3_in(:,:,1) - e3t_0(:,:,1)
	771	! - ML - The use of mask in this formulea enables the special treatment of the last w-point without indirect adressing
	772	!!gm BUG? use here wmask in case of ISF ? to be checked
	773	DO jk = 2, jpk
	774	pe3_out(:,:,jk) = e3w_0(:,:,jk) + ( 1.0_wp - 0.5_wp * ( tmask(:,:,jk) * (1.0_wp - zlnwd) + zlnwd ) ) &
	775	& * ( pe3_in(:,:,jk-1) - e3t_0(:,:,jk-1) ) &
	776	& + 0.5_wp * ( tmask(:,:,jk) * (1.0_wp - zlnwd) + zlnwd ) &
	777	& * ( pe3_in(:,:,jk ) - e3t_0(:,:,jk ) )
	778	END DO
	779	!
	780	CASE( 'UW' ) !* from U- to UW-point : vertical simple mean
	781	!
	782	pe3_out(:,:,1) = e3uw_0(:,:,1) + pe3_in(:,:,1) - e3u_0(:,:,1)
	783	! - ML - The use of mask in this formaula enables the special treatment of the last w- point without indirect adressing
	784	!!gm BUG? use here wumask in case of ISF ? to be checked
	785	DO jk = 2, jpk
	786	pe3_out(:,:,jk) = e3uw_0(:,:,jk) + ( 1.0_wp - 0.5_wp * ( umask(:,:,jk) * (1.0_wp - zlnwd) + zlnwd ) ) &
	787	& * ( pe3_in(:,:,jk-1) - e3u_0(:,:,jk-1) ) &
	788	& + 0.5_wp * ( umask(:,:,jk) * (1.0_wp - zlnwd) + zlnwd ) &
	789	& * ( pe3_in(:,:,jk ) - e3u_0(:,:,jk ) )
	790	END DO
	791	!
	792	CASE( 'VW' ) !* from V- to VW-point : vertical simple mean
	793	!
	794	pe3_out(:,:,1) = e3vw_0(:,:,1) + pe3_in(:,:,1) - e3v_0(:,:,1)
	795	! - ML - The use of mask in this formaula enables the special treatment of the last w- point without indirect adressing
	796	!!gm BUG? use here wvmask in case of ISF ? to be checked
	797	DO jk = 2, jpk
	798	pe3_out(:,:,jk) = e3vw_0(:,:,jk) + ( 1.0_wp - 0.5_wp * ( vmask(:,:,jk) * (1.0_wp - zlnwd) + zlnwd ) ) &
	799	& * ( pe3_in(:,:,jk-1) - e3v_0(:,:,jk-1) ) &
	800	& + 0.5_wp * ( vmask(:,:,jk) * (1.0_wp - zlnwd) + zlnwd ) &
	801	& * ( pe3_in(:,:,jk ) - e3v_0(:,:,jk ) )
	802	END DO
	803	END SELECT
	804	!
	805	END SUBROUTINE dom_vvl_interpol
	806
	807
[11949]	808	SUBROUTINE dom_vvl_rst( kt, Kbb, Kmm, cdrw )
[9067]	809	!!---------------------------------------------------------------------
	810	!! * ROUTINE dom_vvl_rst *
	811	!!
	812	!! ** Purpose : Read or write VVL file in restart file
	813	!!
	814	!! ** Method : use of IOM library
	815	!! if the restart does not contain vertical scale factors,
	816	!! they are set to the _0 values
	817	!! if the restart does not contain vertical scale factors increments (z_tilde),
	818	!! they are set to 0.
	819	!!----------------------------------------------------------------------
[11949]	820	INTEGER , INTENT(in) :: kt ! ocean time-step
	821	INTEGER , INTENT(in) :: Kbb, Kmm ! ocean time level indices
	822	CHARACTER(len=*), INTENT(in) :: cdrw ! "READ"/"WRITE" flag
[9067]	823	!
	824	INTEGER :: ji, jj, jk
	825	INTEGER :: id1, id2, id3, id4, id5 ! local integers
	826	!!----------------------------------------------------------------------
	827	!
	828	IF( TRIM(cdrw) == 'READ' ) THEN ! Read/initialise
	829	! ! ===============
	830	IF( ln_rstart ) THEN !* Read the restart file
	831	CALL rst_read_open ! open the restart file if necessary
[11949]	832	CALL iom_get( numror, jpdom_autoglo, 'sshn' , ssh(:,:,Kmm), ldxios = lrxios )
[9067]	833	!
	834	id1 = iom_varid( numror, 'e3t_b', ldstop = .FALSE. )
	835	id2 = iom_varid( numror, 'e3t_n', ldstop = .FALSE. )
	836	id3 = iom_varid( numror, 'tilde_e3t_b', ldstop = .FALSE. )
	837	id4 = iom_varid( numror, 'tilde_e3t_n', ldstop = .FALSE. )
	838	id5 = iom_varid( numror, 'hdiv_lf', ldstop = .FALSE. )
	839	! ! --------- !
	840	! ! all cases !
	841	! ! --------- !
	842	IF( MIN( id1, id2 ) > 0 ) THEN ! all required arrays exist
[11949]	843	CALL iom_get( numror, jpdom_autoglo, 'e3t_b', e3t(:,:,:,Kbb), ldxios = lrxios )
	844	CALL iom_get( numror, jpdom_autoglo, 'e3t_n', e3t(:,:,:,Kmm), ldxios = lrxios )
[9067]	845	! needed to restart if land processor not computed
[11949]	846	IF(lwp) write(numout,*) 'dom_vvl_rst : e3t(:,:,:,Kbb) and e3t(:,:,:,Kmm) found in restart files'
[9067]	847	WHERE ( tmask(:,:,:) == 0.0_wp )
[11949]	848	e3t(:,:,:,Kmm) = e3t_0(:,:,:)
	849	e3t(:,:,:,Kbb) = e3t_0(:,:,:)
[9067]	850	END WHERE
	851	IF( neuler == 0 ) THEN
[11949]	852	e3t(:,:,:,Kbb) = e3t(:,:,:,Kmm)
[9067]	853	ENDIF
	854	ELSE IF( id1 > 0 ) THEN
[11949]	855	IF(lwp) write(numout,*) 'dom_vvl_rst WARNING : e3t(:,:,:,Kmm) not found in restart files'
[9067]	856	IF(lwp) write(numout,*) 'e3t_n set equal to e3t_b.'
	857	IF(lwp) write(numout,*) 'neuler is forced to 0'
[11949]	858	CALL iom_get( numror, jpdom_autoglo, 'e3t_b', e3t(:,:,:,Kbb), ldxios = lrxios )
	859	e3t(:,:,:,Kmm) = e3t(:,:,:,Kbb)
[9067]	860	neuler = 0
	861	ELSE IF( id2 > 0 ) THEN
[11949]	862	IF(lwp) write(numout,*) 'dom_vvl_rst WARNING : e3t(:,:,:,Kbb) not found in restart files'
[9067]	863	IF(lwp) write(numout,*) 'e3t_b set equal to e3t_n.'
	864	IF(lwp) write(numout,*) 'neuler is forced to 0'
[11949]	865	CALL iom_get( numror, jpdom_autoglo, 'e3t_n', e3t(:,:,:,Kmm), ldxios = lrxios )
	866	e3t(:,:,:,Kbb) = e3t(:,:,:,Kmm)
[9067]	867	neuler = 0
	868	ELSE
[11949]	869	IF(lwp) write(numout,*) 'dom_vvl_rst WARNING : e3t(:,:,:,Kmm) not found in restart file'
[9067]	870	IF(lwp) write(numout,*) 'Compute scale factor from sshn'
	871	IF(lwp) write(numout,*) 'neuler is forced to 0'
	872	DO jk = 1, jpk
[11949]	873	e3t(:,:,jk,Kmm) = e3t_0(:,:,jk) * ( ht_0(:,:) + ssh(:,:,Kmm) ) &
[9067]	874	& / ( ht_0(:,:) + 1._wp - ssmask(:,:) ) * tmask(:,:,jk) &
	875	& + e3t_0(:,:,jk) * (1._wp -tmask(:,:,jk))
	876	END DO
[11949]	877	e3t(:,:,:,Kbb) = e3t(:,:,:,Kmm)
[9067]	878	neuler = 0
	879	ENDIF
	880	! ! ----------- !
	881	IF( ln_vvl_zstar ) THEN ! z_star case !
	882	! ! ----------- !
	883	IF( MIN( id3, id4 ) > 0 ) THEN
	884	CALL ctl_stop( 'dom_vvl_rst: z_star cannot restart from a z_tilde or layer run' )
	885	ENDIF
	886	! ! ----------------------- !
	887	ELSE ! z_tilde and layer cases !
	888	! ! ----------------------- !
	889	IF( MIN( id3, id4 ) > 0 ) THEN ! all required arrays exist
[9729]	890	CALL iom_get( numror, jpdom_autoglo, 'tilde_e3t_b', tilde_e3t_b(:,:,:), ldxios = lrxios )
	891	CALL iom_get( numror, jpdom_autoglo, 'tilde_e3t_n', tilde_e3t_n(:,:,:), ldxios = lrxios )
[9067]	892	ELSE ! one at least array is missing
	893	tilde_e3t_b(:,:,:) = 0.0_wp
	894	tilde_e3t_n(:,:,:) = 0.0_wp
	895	ENDIF
	896	! ! ------------ !
	897	IF( ln_vvl_ztilde ) THEN ! z_tilde case !
	898	! ! ------------ !
	899	IF( id5 > 0 ) THEN ! required array exists
[9729]	900	CALL iom_get( numror, jpdom_autoglo, 'hdiv_lf', hdiv_lf(:,:,:), ldxios = lrxios )
[9067]	901	ELSE ! array is missing
	902	hdiv_lf(:,:,:) = 0.0_wp
	903	ENDIF
	904	ENDIF
	905	ENDIF
	906	!
	907	ELSE !* Initialize at "rest"
	908	!
	909
	910	IF( ll_wd ) THEN ! MJB ll_wd edits start here - these are essential
	911	!
	912	IF( cn_cfg == 'wad' ) THEN
	913	! Wetting and drying test case
[11949]	914	CALL usr_def_istate( gdept(:,:,:,Kbb), tmask, ts(:,:,:,:,Kbb), uu(:,:,:,Kbb), vv(:,:,:,Kbb), ssh(:,:,Kbb) )
	915	ts (:,:,:,:,Kmm) = ts (:,:,:,:,Kbb) ! set now values from to before ones
	916	ssh (:,:,Kmm) = ssh(:,:,Kbb)
	917	uu (:,:,:,Kmm) = uu (:,:,:,Kbb)
	918	vv (:,:,:,Kmm) = vv (:,:,:,Kbb)
[9067]	919	ELSE
	920	! if not test case
[11949]	921	ssh(:,:,Kmm) = -ssh_ref
	922	ssh(:,:,Kbb) = -ssh_ref
[9067]	923
	924	DO jj = 1, jpj
	925	DO ji = 1, jpi
	926	IF( ht_0(ji,jj)-ssh_ref < rn_wdmin1 ) THEN ! if total depth is less than min depth
[11949]	927	ssh(ji,jj,Kbb) = rn_wdmin1 - (ht_0(ji,jj) )
	928	ssh(ji,jj,Kmm) = rn_wdmin1 - (ht_0(ji,jj) )
[9067]	929	ENDIF
	930	ENDDO
	931	ENDDO
	932	ENDIF !If test case else
	933
	934	! Adjust vertical metrics for all wad
	935	DO jk = 1, jpk
[11949]	936	e3t(:,:,jk,Kmm) = e3t_0(:,:,jk) * ( ht_0(:,:) + ssh(:,:,Kmm) ) &
[9067]	937	& / ( ht_0(:,:) + 1._wp - ssmask(:,:) ) * tmask(:,:,jk) &
	938	& + e3t_0(:,:,jk) * ( 1._wp - tmask(:,:,jk) )
	939	END DO
[11949]	940	e3t(:,:,:,Kbb) = e3t(:,:,:,Kmm)
[9067]	941
	942	DO ji = 1, jpi
	943	DO jj = 1, jpj
	944	IF ( ht_0(ji,jj) .LE. 0.0 .AND. NINT( ssmask(ji,jj) ) .EQ. 1) THEN
	945	CALL ctl_stop( 'dom_vvl_rst: ht_0 must be positive at potentially wet points' )
	946	ENDIF
	947	END DO
	948	END DO
	949	!
	950	ELSE
	951	!
[11949]	952	! usr_def_istate called here only to get ssh(Kbb) needed to initialize e3t(Kbb) and e3t(Kmm)
[9067]	953	!
[11949]	954	CALL usr_def_istate( gdept_0, tmask, ts(:,:,:,:,Kbb), uu(:,:,:,Kbb), vv(:,:,:,Kbb), ssh(:,:,Kbb) )
	955	!
	956	! usr_def_istate will be called again in istate_init to initialize ts, ssh, u and v
	957	!
[9067]	958	DO jk=1,jpk
[11949]	959	e3t(:,:,jk,Kbb) = e3t_0(:,:,jk) * ( ht_0(:,:) + ssh(:,:,Kbb) ) &
[9255]	960	& / ( ht_0(:,:) + 1._wp - ssmask(:,:) ) * tmask(:,:,jk) &
[11949]	961	& + e3t_0(:,:,jk) * ( 1._wp - tmask(:,:,jk) ) ! make sure e3t(:,:,:,Kbb) != 0 on land points
[9067]	962	END DO
[11949]	963	e3t(:,:,:,Kmm) = e3t(:,:,:,Kbb)
	964	ssh(:,:,Kmm) = ssh(:,:,Kbb) ! needed later for gde3w
[9067]	965	!
	966	END IF ! end of ll_wd edits
	967
	968	IF( ln_vvl_ztilde .OR. ln_vvl_layer) THEN
	969	tilde_e3t_b(:,:,:) = 0._wp
	970	tilde_e3t_n(:,:,:) = 0._wp
	971	IF( ln_vvl_ztilde ) hdiv_lf(:,:,:) = 0._wp
	972	END IF
	973	ENDIF
	974	!
	975	ELSEIF( TRIM(cdrw) == 'WRITE' ) THEN ! Create restart file
	976	! ! ===================
	977	IF(lwp) WRITE(numout,*) '---- dom_vvl_rst ----'
[9729]	978	IF( lwxios ) CALL iom_swap( cwxios_context )
[9067]	979	! ! --------- !
	980	! ! all cases !
	981	! ! --------- !
[11949]	982	CALL iom_rstput( kt, nitrst, numrow, 'e3t_b', e3t(:,:,:,Kbb), ldxios = lwxios )
	983	CALL iom_rstput( kt, nitrst, numrow, 'e3t_n', e3t(:,:,:,Kmm), ldxios = lwxios )
[9067]	984	! ! ----------------------- !
	985	IF( ln_vvl_ztilde .OR. ln_vvl_layer ) THEN ! z_tilde and layer cases !
	986	! ! ----------------------- !
[9729]	987	CALL iom_rstput( kt, nitrst, numrow, 'tilde_e3t_b', tilde_e3t_b(:,:,:), ldxios = lwxios)
	988	CALL iom_rstput( kt, nitrst, numrow, 'tilde_e3t_n', tilde_e3t_n(:,:,:), ldxios = lwxios)
[9067]	989	END IF
	990	! ! -------------!
	991	IF( ln_vvl_ztilde ) THEN ! z_tilde case !
	992	! ! ------------ !
[9729]	993	CALL iom_rstput( kt, nitrst, numrow, 'hdiv_lf', hdiv_lf(:,:,:), ldxios = lwxios)
[9067]	994	ENDIF
	995	!
[9729]	996	IF( lwxios ) CALL iom_swap( cxios_context )
[9067]	997	ENDIF
	998	!
	999	END SUBROUTINE dom_vvl_rst
	1000
	1001
	1002	SUBROUTINE dom_vvl_ctl
	1003	!!---------------------------------------------------------------------
	1004	!! * ROUTINE dom_vvl_ctl *
	1005	!!
	1006	!! ** Purpose : Control the consistency between namelist options
	1007	!! for vertical coordinate
	1008	!!----------------------------------------------------------------------
	1009	INTEGER :: ioptio, ios
	1010	!!
	1011	NAMELIST/nam_vvl/ ln_vvl_zstar, ln_vvl_ztilde, ln_vvl_layer, ln_vvl_ztilde_as_zstar, &
	1012	& ln_vvl_zstar_at_eqtor , rn_ahe3 , rn_rst_e3t , &
	1013	& rn_lf_cutoff , rn_zdef_max , ln_vvl_dbg ! not yet implemented: ln_vvl_kepe
	1014	!!----------------------------------------------------------------------
	1015	!
	1016	READ ( numnam_ref, nam_vvl, IOSTAT = ios, ERR = 901)
[11536]	1017	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nam_vvl in reference namelist' )
[9067]	1018	READ ( numnam_cfg, nam_vvl, IOSTAT = ios, ERR = 902 )
[11536]	1019	902 IF( ios > 0 ) CALL ctl_nam ( ios , 'nam_vvl in configuration namelist' )
[9067]	1020	IF(lwm) WRITE ( numond, nam_vvl )
	1021	!
	1022	IF(lwp) THEN ! Namelist print
	1023	WRITE(numout,*)
	1024	WRITE(numout,*) 'dom_vvl_ctl : choice/control of the variable vertical coordinate'
	1025	WRITE(numout,*) '~~~~~~~~~~~'
[9255]	1026	WRITE(numout,*) ' Namelist nam_vvl : chose a vertical coordinate'
	1027	WRITE(numout,*) ' zstar ln_vvl_zstar = ', ln_vvl_zstar
	1028	WRITE(numout,*) ' ztilde ln_vvl_ztilde = ', ln_vvl_ztilde
	1029	WRITE(numout,*) ' layer ln_vvl_layer = ', ln_vvl_layer
	1030	WRITE(numout,*) ' ztilde as zstar ln_vvl_ztilde_as_zstar = ', ln_vvl_ztilde_as_zstar
[9067]	1031	WRITE(numout,*) ' ztilde near the equator ln_vvl_zstar_at_eqtor = ', ln_vvl_zstar_at_eqtor
[9255]	1032	WRITE(numout,*) ' !'
	1033	WRITE(numout,*) ' thickness diffusion coefficient rn_ahe3 = ', rn_ahe3
	1034	WRITE(numout,*) ' maximum e3t deformation fractional change rn_zdef_max = ', rn_zdef_max
[9067]	1035	IF( ln_vvl_ztilde_as_zstar ) THEN
[9255]	1036	WRITE(numout,*) ' ztilde running in zstar emulation mode (ln_vvl_ztilde_as_zstar=T) '
	1037	WRITE(numout,*) ' ignoring namelist timescale parameters and using:'
	1038	WRITE(numout,*) ' hard-wired : z-tilde to zstar restoration timescale (days)'
	1039	WRITE(numout,*) ' rn_rst_e3t = 0.e0'
	1040	WRITE(numout,*) ' hard-wired : z-tilde cutoff frequency of low-pass filter (days)'
	1041	WRITE(numout,*) ' rn_lf_cutoff = 1.0/rdt'
[9067]	1042	ELSE
[9255]	1043	WRITE(numout,*) ' z-tilde to zstar restoration timescale (days) rn_rst_e3t = ', rn_rst_e3t
	1044	WRITE(numout,*) ' z-tilde cutoff frequency of low-pass filter (days) rn_lf_cutoff = ', rn_lf_cutoff
[9067]	1045	ENDIF
[9255]	1046	WRITE(numout,*) ' debug prints flag ln_vvl_dbg = ', ln_vvl_dbg
[9067]	1047	ENDIF
	1048	!
	1049	ioptio = 0 ! Parameter control
	1050	IF( ln_vvl_ztilde_as_zstar ) ln_vvl_ztilde = .true.
	1051	IF( ln_vvl_zstar ) ioptio = ioptio + 1
	1052	IF( ln_vvl_ztilde ) ioptio = ioptio + 1
	1053	IF( ln_vvl_layer ) ioptio = ioptio + 1
	1054	!
	1055	IF( ioptio /= 1 ) CALL ctl_stop( 'Choose ONE vertical coordinate in namelist nam_vvl' )
	1056	!
	1057	IF(lwp) THEN ! Print the choice
	1058	WRITE(numout,*)
[9255]	1059	IF( ln_vvl_zstar ) WRITE(numout,*) ' ==>>> zstar vertical coordinate is used'
	1060	IF( ln_vvl_ztilde ) WRITE(numout,*) ' ==>>> ztilde vertical coordinate is used'
	1061	IF( ln_vvl_layer ) WRITE(numout,*) ' ==>>> layer vertical coordinate is used'
	1062	IF( ln_vvl_ztilde_as_zstar ) WRITE(numout,*) ' ==>>> to emulate a zstar coordinate'
[9067]	1063	ENDIF
	1064	!
	1065	#if defined key_agrif
[9255]	1066	IF( (.NOT.Agrif_Root()).AND.(.NOT.ln_vvl_zstar) ) CALL ctl_stop( 'AGRIF is implemented with zstar coordinate only' )
[9067]	1067	#endif
	1068	!
	1069	END SUBROUTINE dom_vvl_ctl
	1070
	1071	!!======================================================================
	1072	END MODULE domvvl

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