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diaar5.F90 in NEMO/branches/2020/dev_r12377_KERNEL-06_techene_e3/src/OCE/DIA – NEMO

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source: NEMO/branches/2020/dev_r12377_KERNEL-06_techene_e3/src/OCE/DIA/diaar5.F90 @ 12680

Last change on this file since 12680 was 12680, checked in by techene, 4 years ago
dynatfQCO.F90, stepLF.F90 : fixed (remove pe3. from dyn_atf_qco input arguments), all : remove e3. tables and include gurvan's feedbacks
Property svn:keywords set to `Id`
File size: 18.8 KB

Rev	Line
[1756]	1	MODULE diaar5
	2	!!======================================================================
	3	!! * MODULE diaar5 *
	4	!! AR5 diagnostics
	5	!!======================================================================
[2528]	6	!! History : 3.2 ! 2009-11 (S. Masson) Original code
	7	!! 3.3 ! 2010-10 (C. Ethe, G. Madec) reorganisation of initialisation phase + merge TRC-TRA
[1756]	8	!!----------------------------------------------------------------------
[2528]	9	!! dia_ar5 : AR5 diagnostics
	10	!! dia_ar5_init : initialisation of AR5 diagnostics
[1756]	11	!!----------------------------------------------------------------------
	12	USE oce ! ocean dynamics and active tracers
	13	USE dom_oce ! ocean space and time domain
[2528]	14	USE eosbn2 ! equation of state (eos_bn2 routine)
[9124]	15	USE phycst ! physical constant
	16	USE in_out_manager ! I/O manager
	17	USE zdfddm
	18	USE zdf_oce
	19	!
[1756]	20	USE lib_mpp ! distribued memory computing library
	21	USE iom ! I/O manager library
[9124]	22	USE fldread ! type FLD_N
[3294]	23	USE timing ! preformance summary
[1756]	24
	25	IMPLICIT NONE
	26	PRIVATE
	27
[2528]	28	PUBLIC dia_ar5 ! routine called in step.F90 module
[2715]	29	PUBLIC dia_ar5_alloc ! routine called in nemogcm.F90 module
[7646]	30	PUBLIC dia_ar5_hst ! heat/salt transport
[1756]	31
[2528]	32	REAL(wp) :: vol0 ! ocean volume (interior domain)
	33	REAL(wp) :: area_tot ! total ocean surface (interior domain)
[2715]	34	REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,: ) :: area ! cell surface (interior domain)
	35	REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,: ) :: thick0 ! ocean thickness (interior domain)
	36	REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sn0 ! initial salinity
[7646]	37
	38	LOGICAL :: l_ar5
[1756]	39
[7646]	40	!! * Substitutions
[12377]	41	# include "do_loop_substitute.h90"
[12622]	42	# include "domzgr_substitute.h90"
[1756]	43	!!----------------------------------------------------------------------
[9598]	44	!! NEMO/OCE 4.0 , NEMO Consortium (2018)
[2528]	45	!! $Id$
[10068]	46	!! Software governed by the CeCILL license (see ./LICENSE)
[1756]	47	!!----------------------------------------------------------------------
	48	CONTAINS
	49
[2715]	50	FUNCTION dia_ar5_alloc()
	51	!!----------------------------------------------------------------------
	52	!! * ROUTINE dia_ar5_alloc *
	53	!!----------------------------------------------------------------------
	54	INTEGER :: dia_ar5_alloc
	55	!!----------------------------------------------------------------------
	56	!
	57	ALLOCATE( area(jpi,jpj), thick0(jpi,jpj) , sn0(jpi,jpj,jpk) , STAT=dia_ar5_alloc )
	58	!
[10425]	59	CALL mpp_sum ( 'diaar5', dia_ar5_alloc )
	60	IF( dia_ar5_alloc /= 0 ) CALL ctl_stop( 'STOP', 'dia_ar5_alloc: failed to allocate arrays' )
[2715]	61	!
	62	END FUNCTION dia_ar5_alloc
	63
	64
[12377]	65	SUBROUTINE dia_ar5( kt, Kmm )
[1756]	66	!!----------------------------------------------------------------------
	67	!! * ROUTINE dia_ar5 *
	68	!!
[2528]	69	!! ** Purpose : compute and output some AR5 diagnostics
[1756]	70	!!----------------------------------------------------------------------
[2715]	71	!
[1756]	72	INTEGER, INTENT( in ) :: kt ! ocean time-step index
[12377]	73	INTEGER, INTENT( in ) :: Kmm ! ocean time level index
[2715]	74	!
[12276]	75	INTEGER :: ji, jj, jk, iks, ikb ! dummy loop arguments
	76	REAL(wp) :: zvolssh, zvol, zssh_steric, zztmp, zarho, ztemp, zsal, zmass, zsst
[7646]	77	REAL(wp) :: zaw, zbw, zrw
[3294]	78	!
[9125]	79	REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zarea_ssh , zbotpres ! 2D workspace
[12680]	80	REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: z2d, zpe ! 2D workspace
	81	REAL(wp), ALLOCATABLE, DIMENSION(:,:,:) :: z3d, zrhd , zrhop, ztpot ! 3D workspace
[9125]	82	REAL(wp), ALLOCATABLE, DIMENSION(:,:,:,:) :: ztsn ! 4D workspace
	83
[1756]	84	!!--------------------------------------------------------------------
[9124]	85	IF( ln_timing ) CALL timing_start('dia_ar5')
[3294]	86
[7646]	87	IF( kt == nit000 ) CALL dia_ar5_init
[1756]	88
[9125]	89	IF( l_ar5 ) THEN
[12276]	90	ALLOCATE( zarea_ssh(jpi,jpj), zbotpres(jpi,jpj), z2d(jpi,jpj) )
[9125]	91	ALLOCATE( zrhd(jpi,jpj,jpk) , zrhop(jpi,jpj,jpk) )
	92	ALLOCATE( ztsn(jpi,jpj,jpk,jpts) )
[12377]	93	zarea_ssh(:,:) = area(:,:) * ssh(:,:,Kmm)
[7646]	94	ENDIF
	95	!
[12276]	96	CALL iom_put( 'e2u' , e2u (:,:) )
	97	CALL iom_put( 'e1v' , e1v (:,:) )
	98	CALL iom_put( 'areacello', area(:,:) )
	99	!
	100	IF( iom_use( 'volcello' ) .OR. iom_use( 'masscello' ) ) THEN
	101	zrhd(:,:,jpk) = 0._wp ! ocean volume ; rhd is used as workspace
	102	DO jk = 1, jpkm1
[12377]	103	zrhd(:,:,jk) = area(:,:) * e3t(:,:,jk,Kmm) * tmask(:,:,jk)
[12276]	104	END DO
[12622]	105	DO jk = 1, jpk
[12680]	106	z3d(:,:,jk) = rau0 * e3t(:,:,jk,Kmm) * tmask(:,:,jk)
[12622]	107	END DO
[12276]	108	CALL iom_put( 'volcello' , zrhd(:,:,:) ) ! WARNING not consistent with CMIP DR where volcello is at ca. 2000
[12680]	109	CALL iom_put( 'masscello' , z3d (:,:,:) ) ! ocean mass
[12276]	110	ENDIF
	111	!
	112	IF( iom_use( 'e3tb' ) ) THEN ! bottom layer thickness
[12377]	113	DO_2D_11_11
	114	ikb = mbkt(ji,jj)
	115	z2d(ji,jj) = e3t(ji,jj,ikb,Kmm)
	116	END_2D
[12276]	117	CALL iom_put( 'e3tb', z2d )
	118	ENDIF
	119	!
[7646]	120	IF( iom_use( 'voltot' ) .OR. iom_use( 'sshtot' ) .OR. iom_use( 'sshdyn' ) ) THEN
	121	! ! total volume of liquid seawater
[12276]	122	zvolssh = glob_sum( 'diaar5', zarea_ssh(:,:) )
	123	zvol = vol0 + zvolssh
[1756]	124
[7646]	125	CALL iom_put( 'voltot', zvol )
	126	CALL iom_put( 'sshtot', zvolssh / area_tot )
[12377]	127	CALL iom_put( 'sshdyn', ssh(:,:,Kmm) - (zvolssh / area_tot) )
[7646]	128	!
	129	ENDIF
[1756]	130
[7646]	131	IF( iom_use( 'botpres' ) .OR. iom_use( 'sshthster' ) .OR. iom_use( 'sshsteric' ) ) THEN
	132	!
[12377]	133	ztsn(:,:,:,jp_tem) = ts(:,:,:,jp_tem,Kmm) ! thermosteric ssh
[7753]	134	ztsn(:,:,:,jp_sal) = sn0(:,:,:)
[12377]	135	CALL eos( ztsn, zrhd, gdept(:,:,:,Kmm) ) ! now in situ density using initial salinity
[7646]	136	!
[7753]	137	zbotpres(:,:) = 0._wp ! no atmospheric surface pressure, levitating sea-ice
[7646]	138	DO jk = 1, jpkm1
[12377]	139	zbotpres(:,:) = zbotpres(:,:) + e3t(:,:,jk,Kmm) * zrhd(:,:,jk)
[7646]	140	END DO
	141	IF( ln_linssh ) THEN
	142	IF( ln_isfcav ) THEN
	143	DO ji = 1, jpi
	144	DO jj = 1, jpj
[12276]	145	iks = mikt(ji,jj)
[12377]	146	zbotpres(ji,jj) = zbotpres(ji,jj) + ssh(ji,jj,Kmm) * zrhd(ji,jj,iks) + riceload(ji,jj)
[7646]	147	END DO
[5120]	148	END DO
[7646]	149	ELSE
[12377]	150	zbotpres(:,:) = zbotpres(:,:) + ssh(:,:,Kmm) * zrhd(:,:,1)
[7646]	151	END IF
[6140]	152	!!gm
	153	!!gm riceload should be added in both ln_linssh=T or F, no?
	154	!!gm
[7646]	155	END IF
	156	!
[12276]	157	zarho = glob_sum( 'diaar5', area(:,:) * zbotpres(:,:) )
[7646]	158	zssh_steric = - zarho / area_tot
	159	CALL iom_put( 'sshthster', zssh_steric )
[1756]	160
[7646]	161	! ! steric sea surface height
[12377]	162	CALL eos( ts(:,:,:,:,Kmm), zrhd, zrhop, gdept(:,:,:,Kmm) ) ! now in situ and potential density
[7753]	163	zrhop(:,:,jpk) = 0._wp
[7646]	164	CALL iom_put( 'rhop', zrhop )
	165	!
[7753]	166	zbotpres(:,:) = 0._wp ! no atmospheric surface pressure, levitating sea-ice
[7646]	167	DO jk = 1, jpkm1
[12377]	168	zbotpres(:,:) = zbotpres(:,:) + e3t(:,:,jk,Kmm) * zrhd(:,:,jk)
[7646]	169	END DO
	170	IF( ln_linssh ) THEN
	171	IF ( ln_isfcav ) THEN
	172	DO ji = 1,jpi
	173	DO jj = 1,jpj
[12276]	174	iks = mikt(ji,jj)
[12377]	175	zbotpres(ji,jj) = zbotpres(ji,jj) + ssh(ji,jj,Kmm) * zrhd(ji,jj,iks) + riceload(ji,jj)
[7646]	176	END DO
[5120]	177	END DO
[7646]	178	ELSE
[12377]	179	zbotpres(:,:) = zbotpres(:,:) + ssh(:,:,Kmm) * zrhd(:,:,1)
[7646]	180	END IF
[5120]	181	END IF
[7646]	182	!
[12276]	183	zarho = glob_sum( 'diaar5', area(:,:) * zbotpres(:,:) )
[7646]	184	zssh_steric = - zarho / area_tot
	185	CALL iom_put( 'sshsteric', zssh_steric )
	186	! ! ocean bottom pressure
	187	zztmp = rau0 * grav * 1.e-4_wp ! recover pressure from pressure anomaly and cover to dbar = 1.e4 Pa
[12377]	188	zbotpres(:,:) = zztmp * ( zbotpres(:,:) + ssh(:,:,Kmm) + thick0(:,:) )
[7646]	189	CALL iom_put( 'botpres', zbotpres )
	190	!
	191	ENDIF
[1756]	192
[7646]	193	IF( iom_use( 'masstot' ) .OR. iom_use( 'temptot' ) .OR. iom_use( 'saltot' ) ) THEN
[12276]	194	! ! Mean density anomalie, temperature and salinity
	195	ztsn(:,:,:,:) = 0._wp ! ztsn(:,:,1,jp_tem/sal) is used here as 2D Workspace for temperature & salinity
[12377]	196	DO_3D_11_11( 1, jpkm1 )
	197	zztmp = area(ji,jj) * e3t(ji,jj,jk,Kmm)
	198	ztsn(ji,jj,1,jp_tem) = ztsn(ji,jj,1,jp_tem) + zztmp * ts(ji,jj,jk,jp_tem,Kmm)
	199	ztsn(ji,jj,1,jp_sal) = ztsn(ji,jj,1,jp_sal) + zztmp * ts(ji,jj,jk,jp_sal,Kmm)
	200	END_3D
[12276]	201
	202	IF( ln_linssh ) THEN
[7646]	203	IF( ln_isfcav ) THEN
	204	DO ji = 1, jpi
	205	DO jj = 1, jpj
[12276]	206	iks = mikt(ji,jj)
[12377]	207	ztsn(ji,jj,1,jp_tem) = ztsn(ji,jj,1,jp_tem) + zarea_ssh(ji,jj) * ts(ji,jj,iks,jp_tem,Kmm)
	208	ztsn(ji,jj,1,jp_sal) = ztsn(ji,jj,1,jp_sal) + zarea_ssh(ji,jj) * ts(ji,jj,iks,jp_sal,Kmm)
[7646]	209	END DO
[5120]	210	END DO
[7646]	211	ELSE
[12377]	212	ztsn(:,:,1,jp_tem) = ztsn(:,:,1,jp_tem) + zarea_ssh(:,:) * ts(:,:,1,jp_tem,Kmm)
	213	ztsn(:,:,1,jp_sal) = ztsn(:,:,1,jp_sal) + zarea_ssh(:,:) * ts(:,:,1,jp_sal,Kmm)
[7646]	214	END IF
	215	ENDIF
	216	!
[12276]	217	ztemp = glob_sum( 'diaar5', ztsn(:,:,1,jp_tem) )
	218	zsal = glob_sum( 'diaar5', ztsn(:,:,1,jp_sal) )
	219	zmass = rau0 * ( zarho + zvol )
[7646]	220	!
	221	CALL iom_put( 'masstot', zmass )
[12276]	222	CALL iom_put( 'temptot', ztemp / zvol )
	223	CALL iom_put( 'saltot' , zsal / zvol )
[7646]	224	!
[12276]	225	ENDIF
	226
	227	IF( ln_teos10 ) THEN ! ! potential temperature (TEOS-10 case)
	228	IF( iom_use( 'toce_pot') .OR. iom_use( 'temptot_pot' ) .OR. iom_use( 'sst_pot' ) &
	229	.OR. iom_use( 'ssttot' ) .OR. iom_use( 'tosmint_pot' ) ) THEN
	230	!
	231	ALLOCATE( ztpot(jpi,jpj,jpk) )
	232	ztpot(:,:,jpk) = 0._wp
	233	DO jk = 1, jpkm1
[12377]	234	ztpot(:,:,jk) = eos_pt_from_ct( ts(:,:,jk,jp_tem,Kmm), ts(:,:,jk,jp_sal,Kmm) )
[12276]	235	END DO
	236	!
	237	CALL iom_put( 'toce_pot', ztpot(:,:,:) ) ! potential temperature (TEOS-10 case)
	238	CALL iom_put( 'sst_pot' , ztpot(:,:,1) ) ! surface temperature
	239	!
	240	IF( iom_use( 'temptot_pot' ) ) THEN ! Output potential temperature in case we use TEOS-10
	241	z2d(:,:) = 0._wp
	242	DO jk = 1, jpkm1
[12377]	243	z2d(:,:) = z2d(:,:) + area(:,:) * e3t(:,:,jk,Kmm) * ztpot(:,:,jk)
[12276]	244	END DO
	245	ztemp = glob_sum( 'diaar5', z2d(:,:) )
	246	CALL iom_put( 'temptot_pot', ztemp / zvol )
	247	ENDIF
	248	!
	249	IF( iom_use( 'ssttot' ) ) THEN ! Output potential temperature in case we use TEOS-10
	250	zsst = glob_sum( 'diaar5', area(:,:) * ztpot(:,:,1) )
	251	CALL iom_put( 'ssttot', zsst / area_tot )
	252	ENDIF
	253	! Vertical integral of temperature
	254	IF( iom_use( 'tosmint_pot') ) THEN
	255	z2d(:,:) = 0._wp
[12377]	256	DO_3D_11_11( 1, jpkm1 )
	257	z2d(ji,jj) = z2d(ji,jj) + rau0 * e3t(ji,jj,jk,Kmm) * ztpot(ji,jj,jk)
	258	END_3D
[12276]	259	CALL iom_put( 'tosmint_pot', z2d )
	260	ENDIF
	261	DEALLOCATE( ztpot )
	262	ENDIF
	263	ELSE
	264	IF( iom_use('ssttot') ) THEN ! Output sst in case we use EOS-80
[12377]	265	zsst = glob_sum( 'diaar5', area(:,:) * ts(:,:,1,jp_tem,Kmm) )
[12276]	266	CALL iom_put('ssttot', zsst / area_tot )
	267	ENDIF
[1756]	268	ENDIF
[7646]	269
	270	IF( iom_use( 'tnpeo' )) THEN
[12276]	271	! Work done against stratification by vertical mixing
	272	! Exclude points where rn2 is negative as convection kicks in here and
	273	! work is not being done against stratification
[9125]	274	ALLOCATE( zpe(jpi,jpj) )
[8078]	275	zpe(:,:) = 0._wp
[9019]	276	IF( ln_zdfddm ) THEN
[12377]	277	DO_3D_11_11( 2, jpk )
	278	IF( rn2(ji,jj,jk) > 0._wp ) THEN
	279	zrw = ( gdept(ji,jj,jk,Kmm) - gdepw(ji,jj,jk,Kmm) ) / e3w(ji,jj,jk,Kmm)
	280	!
	281	zaw = rab_n(ji,jj,jk,jp_tem) * (1. - zrw) + rab_n(ji,jj,jk-1,jp_tem)* zrw
	282	zbw = rab_n(ji,jj,jk,jp_sal) * (1. - zrw) + rab_n(ji,jj,jk-1,jp_sal)* zrw
	283	!
	284	zpe(ji, jj) = zpe(ji,jj) &
	285	& - grav * ( avt(ji,jj,jk) * zaw * (ts(ji,jj,jk-1,jp_tem,Kmm) - ts(ji,jj,jk,jp_tem,Kmm) ) &
	286	& - avs(ji,jj,jk) * zbw * (ts(ji,jj,jk-1,jp_sal,Kmm) - ts(ji,jj,jk,jp_sal,Kmm) ) )
	287	ENDIF
	288	END_3D
[7646]	289	ELSE
[12377]	290	DO_3D_11_11( 1, jpk )
	291	zpe(ji,jj) = zpe(ji,jj) + avt(ji,jj,jk) * MIN(0._wp,rn2(ji,jj,jk)) * rau0 * e3w(ji,jj,jk,Kmm)
	292	END_3D
[8078]	293	ENDIF
[9019]	294	CALL iom_put( 'tnpeo', zpe )
[9125]	295	DEALLOCATE( zpe )
[7646]	296	ENDIF
[9125]	297
[7646]	298	IF( l_ar5 ) THEN
[12276]	299	DEALLOCATE( zarea_ssh , zbotpres, z2d )
[9125]	300	DEALLOCATE( zrhd , zrhop )
	301	DEALLOCATE( ztsn )
[7646]	302	ENDIF
[1756]	303	!
[9124]	304	IF( ln_timing ) CALL timing_stop('dia_ar5')
[3294]	305	!
[1756]	306	END SUBROUTINE dia_ar5
	307
[9124]	308
[12377]	309	SUBROUTINE dia_ar5_hst( ktra, cptr, puflx, pvflx )
[7646]	310	!!----------------------------------------------------------------------
	311	!! * ROUTINE dia_ar5_htr *
	312	!!----------------------------------------------------------------------
	313	!! Wrapper for heat transport calculations
	314	!! Called from all advection and/or diffusion routines
	315	!!----------------------------------------------------------------------
	316	INTEGER , INTENT(in ) :: ktra ! tracer index
	317	CHARACTER(len=3) , INTENT(in) :: cptr ! transport type 'adv'/'ldf'
[12377]	318	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(in) :: puflx ! u-flux of advection/diffusion
	319	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(in) :: pvflx ! v-flux of advection/diffusion
[7646]	320	!
	321	INTEGER :: ji, jj, jk
[9125]	322	REAL(wp), DIMENSION(jpi,jpj) :: z2d
[1756]	323
[7646]	324
[12377]	325	z2d(:,:) = puflx(:,:,1)
	326	DO_3D_00_00( 1, jpkm1 )
	327	z2d(ji,jj) = z2d(ji,jj) + puflx(ji,jj,jk)
	328	END_3D
[10425]	329	CALL lbc_lnk( 'diaar5', z2d, 'U', -1. )
[7646]	330	IF( cptr == 'adv' ) THEN
[12276]	331	IF( ktra == jp_tem ) CALL iom_put( 'uadv_heattr' , rau0_rcp * z2d ) ! advective heat transport in i-direction
	332	IF( ktra == jp_sal ) CALL iom_put( 'uadv_salttr' , rau0 * z2d ) ! advective salt transport in i-direction
[7646]	333	ENDIF
	334	IF( cptr == 'ldf' ) THEN
[12276]	335	IF( ktra == jp_tem ) CALL iom_put( 'udiff_heattr' , rau0_rcp * z2d ) ! diffusive heat transport in i-direction
	336	IF( ktra == jp_sal ) CALL iom_put( 'udiff_salttr' , rau0 * z2d ) ! diffusive salt transport in i-direction
[7646]	337	ENDIF
	338	!
[12377]	339	z2d(:,:) = pvflx(:,:,1)
	340	DO_3D_00_00( 1, jpkm1 )
	341	z2d(ji,jj) = z2d(ji,jj) + pvflx(ji,jj,jk)
	342	END_3D
[10425]	343	CALL lbc_lnk( 'diaar5', z2d, 'V', -1. )
[7646]	344	IF( cptr == 'adv' ) THEN
[12276]	345	IF( ktra == jp_tem ) CALL iom_put( 'vadv_heattr' , rau0_rcp * z2d ) ! advective heat transport in j-direction
	346	IF( ktra == jp_sal ) CALL iom_put( 'vadv_salttr' , rau0 * z2d ) ! advective salt transport in j-direction
[7646]	347	ENDIF
	348	IF( cptr == 'ldf' ) THEN
[12276]	349	IF( ktra == jp_tem ) CALL iom_put( 'vdiff_heattr' , rau0_rcp * z2d ) ! diffusive heat transport in j-direction
	350	IF( ktra == jp_sal ) CALL iom_put( 'vdiff_salttr' , rau0 * z2d ) ! diffusive salt transport in j-direction
[7646]	351	ENDIF
	352
	353	END SUBROUTINE dia_ar5_hst
	354
	355
[1756]	356	SUBROUTINE dia_ar5_init
	357	!!----------------------------------------------------------------------
	358	!! * ROUTINE dia_ar5_init *
	359	!!
[2528]	360	!! ** Purpose : initialization for AR5 diagnostic computation
[1756]	361	!!----------------------------------------------------------------------
	362	INTEGER :: inum
[12276]	363	INTEGER :: ik, idep
[1756]	364	INTEGER :: ji, jj, jk ! dummy loop indices
[7753]	365	REAL(wp) :: zztmp
[9125]	366	REAL(wp), ALLOCATABLE, DIMENSION(:,:,:,:) :: zsaldta ! Jan/Dec levitus salinity
[12276]	367	REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zvol0
[5253]	368	!
[1756]	369	!!----------------------------------------------------------------------
	370	!
[7646]	371	l_ar5 = .FALSE.
	372	IF( iom_use( 'voltot' ) .OR. iom_use( 'sshtot' ) .OR. iom_use( 'sshdyn' ) .OR. &
	373	& iom_use( 'masstot' ) .OR. iom_use( 'temptot' ) .OR. iom_use( 'saltot' ) .OR. &
	374	& iom_use( 'botpres' ) .OR. iom_use( 'sshthster' ) .OR. iom_use( 'sshsteric' ) ) L_ar5 = .TRUE.
	375
	376	IF( l_ar5 ) THEN
	377	!
	378	! ! allocate dia_ar5 arrays
	379	IF( dia_ar5_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'dia_ar5_init : unable to allocate arrays' )
[2715]	380
[12276]	381	area(:,:) = e1e2t(:,:)
	382	area_tot = glob_sum( 'diaar5', area(:,:) )
[1756]	383
[12276]	384	ALLOCATE( zvol0(jpi,jpj) )
	385	zvol0 (:,:) = 0._wp
[7753]	386	thick0(:,:) = 0._wp
[12377]	387	DO_3D_11_11( 1, jpkm1 )
	388	idep = tmask(ji,jj,jk) * e3t_0(ji,jj,jk)
	389	zvol0 (ji,jj) = zvol0 (ji,jj) + idep * area(ji,jj)
	390	thick0(ji,jj) = thick0(ji,jj) + idep
	391	END_3D
[12276]	392	vol0 = glob_sum( 'diaar5', zvol0 )
	393	DEALLOCATE( zvol0 )
[5253]	394
[9125]	395	IF( iom_use( 'sshthster' ) ) THEN
[12276]	396	ALLOCATE( zsaldta(jpi,jpj,jpk,jpts) )
[9125]	397	CALL iom_open ( 'sali_ref_clim_monthly', inum )
	398	CALL iom_get ( inum, jpdom_data, 'vosaline' , zsaldta(:,:,:,1), 1 )
	399	CALL iom_get ( inum, jpdom_data, 'vosaline' , zsaldta(:,:,:,2), 12 )
	400	CALL iom_close( inum )
[6665]	401
[9125]	402	sn0(:,:,:) = 0.5_wp * ( zsaldta(:,:,:,1) + zsaldta(:,:,:,2) )
	403	sn0(:,:,:) = sn0(:,:,:) * tmask(:,:,:)
	404	IF( ln_zps ) THEN ! z-coord. partial steps
[12377]	405	DO_2D_11_11
	406	ik = mbkt(ji,jj)
	407	IF( ik > 1 ) THEN
	408	zztmp = ( gdept_1d(ik) - gdept_0(ji,jj,ik) ) / ( gdept_1d(ik) - gdept_1d(ik-1) )
	409	sn0(ji,jj,ik) = ( 1._wp - zztmp ) * sn0(ji,jj,ik) + zztmp * sn0(ji,jj,ik-1)
	410	ENDIF
	411	END_2D
[9125]	412	ENDIF
	413	!
	414	DEALLOCATE( zsaldta )
[7646]	415	ENDIF
	416	!
[1756]	417	ENDIF
	418	!
	419	END SUBROUTINE dia_ar5_init
	420
	421	!!======================================================================
	422	END MODULE diaar5

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