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diaar5.F90 in NEMO/trunk/src/OCE/DIA – NEMO

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source: NEMO/trunk/src/OCE/DIA/diaar5.F90 @ 13295

Last change on this file since 13295 was 13295, checked in by acc, 4 years ago
Replace do-loop macros in the trunk with alternative forms with greater flexibility for extra halo applications. This alters a lot of routines but does not change any behaviour or results. do_loop_substitute.h90 is greatly simplified by this change. SETTE results are identical to those with the previous revision
Property svn:keywords set to `Id`
File size: 18.7 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(:,: ) :: thick0 ! ocean thickness (interior domain)
	35	REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sn0 ! initial salinity
[7646]	36
	37	LOGICAL :: l_ar5
[1756]	38
[7646]	39	!! * Substitutions
[12377]	40	# include "do_loop_substitute.h90"
[13237]	41	# include "domzgr_substitute.h90"
[1756]	42	!!----------------------------------------------------------------------
[9598]	43	!! NEMO/OCE 4.0 , NEMO Consortium (2018)
[2528]	44	!! $Id$
[10068]	45	!! Software governed by the CeCILL license (see ./LICENSE)
[1756]	46	!!----------------------------------------------------------------------
	47	CONTAINS
	48
[2715]	49	FUNCTION dia_ar5_alloc()
	50	!!----------------------------------------------------------------------
	51	!! * ROUTINE dia_ar5_alloc *
	52	!!----------------------------------------------------------------------
	53	INTEGER :: dia_ar5_alloc
	54	!!----------------------------------------------------------------------
	55	!
[12630]	56	ALLOCATE( thick0(jpi,jpj) , sn0(jpi,jpj,jpk) , STAT=dia_ar5_alloc )
[2715]	57	!
[10425]	58	CALL mpp_sum ( 'diaar5', dia_ar5_alloc )
	59	IF( dia_ar5_alloc /= 0 ) CALL ctl_stop( 'STOP', 'dia_ar5_alloc: failed to allocate arrays' )
[2715]	60	!
	61	END FUNCTION dia_ar5_alloc
	62
	63
[12377]	64	SUBROUTINE dia_ar5( kt, Kmm )
[1756]	65	!!----------------------------------------------------------------------
	66	!! * ROUTINE dia_ar5 *
	67	!!
[2528]	68	!! ** Purpose : compute and output some AR5 diagnostics
[1756]	69	!!----------------------------------------------------------------------
[2715]	70	!
[1756]	71	INTEGER, INTENT( in ) :: kt ! ocean time-step index
[12377]	72	INTEGER, INTENT( in ) :: Kmm ! ocean time level index
[2715]	73	!
[12276]	74	INTEGER :: ji, jj, jk, iks, ikb ! dummy loop arguments
	75	REAL(wp) :: zvolssh, zvol, zssh_steric, zztmp, zarho, ztemp, zsal, zmass, zsst
[7646]	76	REAL(wp) :: zaw, zbw, zrw
[3294]	77	!
[9125]	78	REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zarea_ssh , zbotpres ! 2D workspace
[13237]	79	REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: z2d, zpe ! 2D workspace
	80	REAL(wp), ALLOCATABLE, DIMENSION(:,:,:) :: z3d, zrhd, ztpot, zgdept ! 3D workspace (zgdept: needed to use the substitute)
[9125]	81	REAL(wp), ALLOCATABLE, DIMENSION(:,:,:,:) :: ztsn ! 4D workspace
	82
[1756]	83	!!--------------------------------------------------------------------
[9124]	84	IF( ln_timing ) CALL timing_start('dia_ar5')
[3294]	85
[7646]	86	IF( kt == nit000 ) CALL dia_ar5_init
[1756]	87
[9125]	88	IF( l_ar5 ) THEN
[12276]	89	ALLOCATE( zarea_ssh(jpi,jpj), zbotpres(jpi,jpj), z2d(jpi,jpj) )
[13089]	90	ALLOCATE( zrhd(jpi,jpj,jpk) )
[9125]	91	ALLOCATE( ztsn(jpi,jpj,jpk,jpts) )
[12630]	92	zarea_ssh(:,:) = e1e2t(:,:) * ssh(:,:,Kmm)
[7646]	93	ENDIF
	94	!
[12630]	95	CALL iom_put( 'e2u' , e2u (:,:) )
	96	CALL iom_put( 'e1v' , e1v (:,:) )
	97	CALL iom_put( 'areacello', e1e2t(:,:) )
[12276]	98	!
	99	IF( iom_use( 'volcello' ) .OR. iom_use( 'masscello' ) ) THEN
	100	zrhd(:,:,jpk) = 0._wp ! ocean volume ; rhd is used as workspace
	101	DO jk = 1, jpkm1
[12630]	102	zrhd(:,:,jk) = e1e2t(:,:) * e3t(:,:,jk,Kmm) * tmask(:,:,jk)
[12276]	103	END DO
[13237]	104	DO jk = 1, jpk
	105	z3d(:,:,jk) = rho0 * e3t(:,:,jk,Kmm) * tmask(:,:,jk)
	106	END DO
[12276]	107	CALL iom_put( 'volcello' , zrhd(:,:,:) ) ! WARNING not consistent with CMIP DR where volcello is at ca. 2000
[13237]	108	CALL iom_put( 'masscello' , z3d (:,:,:) ) ! ocean mass
[12276]	109	ENDIF
	110	!
	111	IF( iom_use( 'e3tb' ) ) THEN ! bottom layer thickness
[13295]	112	DO_2D( 1, 1, 1, 1 )
[12377]	113	ikb = mbkt(ji,jj)
	114	z2d(ji,jj) = e3t(ji,jj,ikb,Kmm)
	115	END_2D
[12276]	116	CALL iom_put( 'e3tb', z2d )
	117	ENDIF
	118	!
[7646]	119	IF( iom_use( 'voltot' ) .OR. iom_use( 'sshtot' ) .OR. iom_use( 'sshdyn' ) ) THEN
	120	! ! total volume of liquid seawater
[12276]	121	zvolssh = glob_sum( 'diaar5', zarea_ssh(:,:) )
	122	zvol = vol0 + zvolssh
[1756]	123
[7646]	124	CALL iom_put( 'voltot', zvol )
	125	CALL iom_put( 'sshtot', zvolssh / area_tot )
[12377]	126	CALL iom_put( 'sshdyn', ssh(:,:,Kmm) - (zvolssh / area_tot) )
[7646]	127	!
	128	ENDIF
[1756]	129
[7646]	130	IF( iom_use( 'botpres' ) .OR. iom_use( 'sshthster' ) .OR. iom_use( 'sshsteric' ) ) THEN
	131	!
[12377]	132	ztsn(:,:,:,jp_tem) = ts(:,:,:,jp_tem,Kmm) ! thermosteric ssh
[7753]	133	ztsn(:,:,:,jp_sal) = sn0(:,:,:)
[13237]	134	ALLOCATE( zgdept(jpi,jpj,jpk) )
	135	DO jk = 1, jpk
	136	zgdept(:,:,jk) = gdept(:,:,jk,Kmm)
	137	END DO
	138	CALL eos( ztsn, zrhd, zgdept) ! now in situ density using initial salinity
[7646]	139	!
[7753]	140	zbotpres(:,:) = 0._wp ! no atmospheric surface pressure, levitating sea-ice
[7646]	141	DO jk = 1, jpkm1
[12377]	142	zbotpres(:,:) = zbotpres(:,:) + e3t(:,:,jk,Kmm) * zrhd(:,:,jk)
[7646]	143	END DO
	144	IF( ln_linssh ) THEN
	145	IF( ln_isfcav ) THEN
	146	DO ji = 1, jpi
	147	DO jj = 1, jpj
[12276]	148	iks = mikt(ji,jj)
[12377]	149	zbotpres(ji,jj) = zbotpres(ji,jj) + ssh(ji,jj,Kmm) * zrhd(ji,jj,iks) + riceload(ji,jj)
[7646]	150	END DO
[5120]	151	END DO
[7646]	152	ELSE
[12377]	153	zbotpres(:,:) = zbotpres(:,:) + ssh(:,:,Kmm) * zrhd(:,:,1)
[7646]	154	END IF
[6140]	155	!!gm
	156	!!gm riceload should be added in both ln_linssh=T or F, no?
	157	!!gm
[7646]	158	END IF
	159	!
[12630]	160	zarho = glob_sum( 'diaar5', e1e2t(:,:) * zbotpres(:,:) )
[7646]	161	zssh_steric = - zarho / area_tot
	162	CALL iom_put( 'sshthster', zssh_steric )
[1756]	163
[7646]	164	! ! steric sea surface height
[7753]	165	zbotpres(:,:) = 0._wp ! no atmospheric surface pressure, levitating sea-ice
[7646]	166	DO jk = 1, jpkm1
[13089]	167	zbotpres(:,:) = zbotpres(:,:) + e3t(:,:,jk,Kmm) * rhd(:,:,jk)
[7646]	168	END DO
	169	IF( ln_linssh ) THEN
	170	IF ( ln_isfcav ) THEN
	171	DO ji = 1,jpi
	172	DO jj = 1,jpj
[12276]	173	iks = mikt(ji,jj)
[13089]	174	zbotpres(ji,jj) = zbotpres(ji,jj) + ssh(ji,jj,Kmm) * rhd(ji,jj,iks) + riceload(ji,jj)
[7646]	175	END DO
[5120]	176	END DO
[7646]	177	ELSE
[13089]	178	zbotpres(:,:) = zbotpres(:,:) + ssh(:,:,Kmm) * rhd(:,:,1)
[7646]	179	END IF
[5120]	180	END IF
[7646]	181	!
[12630]	182	zarho = glob_sum( 'diaar5', e1e2t(:,:) * zbotpres(:,:) )
[7646]	183	zssh_steric = - zarho / area_tot
	184	CALL iom_put( 'sshsteric', zssh_steric )
	185	! ! ocean bottom pressure
[12489]	186	zztmp = rho0 * grav * 1.e-4_wp ! recover pressure from pressure anomaly and cover to dbar = 1.e4 Pa
[12377]	187	zbotpres(:,:) = zztmp * ( zbotpres(:,:) + ssh(:,:,Kmm) + thick0(:,:) )
[7646]	188	CALL iom_put( 'botpres', zbotpres )
	189	!
[13237]	190	DEALLOCATE( zgdept )
	191	!
[7646]	192	ENDIF
[1756]	193
[7646]	194	IF( iom_use( 'masstot' ) .OR. iom_use( 'temptot' ) .OR. iom_use( 'saltot' ) ) THEN
[12276]	195	! ! Mean density anomalie, temperature and salinity
	196	ztsn(:,:,:,:) = 0._wp ! ztsn(:,:,1,jp_tem/sal) is used here as 2D Workspace for temperature & salinity
[13295]	197	DO_3D( 1, 1, 1, 1, 1, jpkm1 )
[12630]	198	zztmp = e1e2t(ji,jj) * e3t(ji,jj,jk,Kmm)
[12377]	199	ztsn(ji,jj,1,jp_tem) = ztsn(ji,jj,1,jp_tem) + zztmp * ts(ji,jj,jk,jp_tem,Kmm)
	200	ztsn(ji,jj,1,jp_sal) = ztsn(ji,jj,1,jp_sal) + zztmp * ts(ji,jj,jk,jp_sal,Kmm)
	201	END_3D
[12276]	202
	203	IF( ln_linssh ) THEN
[7646]	204	IF( ln_isfcav ) THEN
	205	DO ji = 1, jpi
	206	DO jj = 1, jpj
[12276]	207	iks = mikt(ji,jj)
[12377]	208	ztsn(ji,jj,1,jp_tem) = ztsn(ji,jj,1,jp_tem) + zarea_ssh(ji,jj) * ts(ji,jj,iks,jp_tem,Kmm)
	209	ztsn(ji,jj,1,jp_sal) = ztsn(ji,jj,1,jp_sal) + zarea_ssh(ji,jj) * ts(ji,jj,iks,jp_sal,Kmm)
[7646]	210	END DO
[5120]	211	END DO
[7646]	212	ELSE
[12377]	213	ztsn(:,:,1,jp_tem) = ztsn(:,:,1,jp_tem) + zarea_ssh(:,:) * ts(:,:,1,jp_tem,Kmm)
	214	ztsn(:,:,1,jp_sal) = ztsn(:,:,1,jp_sal) + zarea_ssh(:,:) * ts(:,:,1,jp_sal,Kmm)
[7646]	215	END IF
	216	ENDIF
	217	!
[12276]	218	ztemp = glob_sum( 'diaar5', ztsn(:,:,1,jp_tem) )
	219	zsal = glob_sum( 'diaar5', ztsn(:,:,1,jp_sal) )
[12489]	220	zmass = rho0 * ( zarho + zvol )
[7646]	221	!
	222	CALL iom_put( 'masstot', zmass )
[12276]	223	CALL iom_put( 'temptot', ztemp / zvol )
	224	CALL iom_put( 'saltot' , zsal / zvol )
[7646]	225	!
[12276]	226	ENDIF
	227
	228	IF( ln_teos10 ) THEN ! ! potential temperature (TEOS-10 case)
	229	IF( iom_use( 'toce_pot') .OR. iom_use( 'temptot_pot' ) .OR. iom_use( 'sst_pot' ) &
	230	.OR. iom_use( 'ssttot' ) .OR. iom_use( 'tosmint_pot' ) ) THEN
	231	!
	232	ALLOCATE( ztpot(jpi,jpj,jpk) )
	233	ztpot(:,:,jpk) = 0._wp
	234	DO jk = 1, jpkm1
[12377]	235	ztpot(:,:,jk) = eos_pt_from_ct( ts(:,:,jk,jp_tem,Kmm), ts(:,:,jk,jp_sal,Kmm) )
[12276]	236	END DO
	237	!
	238	CALL iom_put( 'toce_pot', ztpot(:,:,:) ) ! potential temperature (TEOS-10 case)
	239	CALL iom_put( 'sst_pot' , ztpot(:,:,1) ) ! surface temperature
	240	!
	241	IF( iom_use( 'temptot_pot' ) ) THEN ! Output potential temperature in case we use TEOS-10
	242	z2d(:,:) = 0._wp
	243	DO jk = 1, jpkm1
[12630]	244	z2d(:,:) = z2d(:,:) + e1e2t(:,:) * e3t(:,:,jk,Kmm) * ztpot(:,:,jk)
[12276]	245	END DO
	246	ztemp = glob_sum( 'diaar5', z2d(:,:) )
	247	CALL iom_put( 'temptot_pot', ztemp / zvol )
	248	ENDIF
	249	!
	250	IF( iom_use( 'ssttot' ) ) THEN ! Output potential temperature in case we use TEOS-10
[12630]	251	zsst = glob_sum( 'diaar5', e1e2t(:,:) * ztpot(:,:,1) )
[12276]	252	CALL iom_put( 'ssttot', zsst / area_tot )
	253	ENDIF
	254	! Vertical integral of temperature
	255	IF( iom_use( 'tosmint_pot') ) THEN
	256	z2d(:,:) = 0._wp
[13295]	257	DO_3D( 1, 1, 1, 1, 1, jpkm1 )
[12489]	258	z2d(ji,jj) = z2d(ji,jj) + rho0 * e3t(ji,jj,jk,Kmm) * ztpot(ji,jj,jk)
[12377]	259	END_3D
[12276]	260	CALL iom_put( 'tosmint_pot', z2d )
	261	ENDIF
	262	DEALLOCATE( ztpot )
	263	ENDIF
	264	ELSE
	265	IF( iom_use('ssttot') ) THEN ! Output sst in case we use EOS-80
[12630]	266	zsst = glob_sum( 'diaar5', e1e2t(:,:) * ts(:,:,1,jp_tem,Kmm) )
[12276]	267	CALL iom_put('ssttot', zsst / area_tot )
	268	ENDIF
[1756]	269	ENDIF
[7646]	270
	271	IF( iom_use( 'tnpeo' )) THEN
[12276]	272	! Work done against stratification by vertical mixing
	273	! Exclude points where rn2 is negative as convection kicks in here and
	274	! work is not being done against stratification
[9125]	275	ALLOCATE( zpe(jpi,jpj) )
[8078]	276	zpe(:,:) = 0._wp
[9019]	277	IF( ln_zdfddm ) THEN
[13295]	278	DO_3D( 1, 1, 1, 1, 2, jpk )
[12377]	279	IF( rn2(ji,jj,jk) > 0._wp ) THEN
	280	zrw = ( gdept(ji,jj,jk,Kmm) - gdepw(ji,jj,jk,Kmm) ) / e3w(ji,jj,jk,Kmm)
	281	!
	282	zaw = rab_n(ji,jj,jk,jp_tem) * (1. - zrw) + rab_n(ji,jj,jk-1,jp_tem)* zrw
	283	zbw = rab_n(ji,jj,jk,jp_sal) * (1. - zrw) + rab_n(ji,jj,jk-1,jp_sal)* zrw
	284	!
	285	zpe(ji, jj) = zpe(ji,jj) &
	286	& - grav * ( avt(ji,jj,jk) * zaw * (ts(ji,jj,jk-1,jp_tem,Kmm) - ts(ji,jj,jk,jp_tem,Kmm) ) &
	287	& - avs(ji,jj,jk) * zbw * (ts(ji,jj,jk-1,jp_sal,Kmm) - ts(ji,jj,jk,jp_sal,Kmm) ) )
	288	ENDIF
	289	END_3D
[7646]	290	ELSE
[13295]	291	DO_3D( 1, 1, 1, 1, 1, jpk )
[12489]	292	zpe(ji,jj) = zpe(ji,jj) + avt(ji,jj,jk) * MIN(0._wp,rn2(ji,jj,jk)) * rho0 * e3w(ji,jj,jk,Kmm)
[12377]	293	END_3D
[8078]	294	ENDIF
[9019]	295	CALL iom_put( 'tnpeo', zpe )
[9125]	296	DEALLOCATE( zpe )
[7646]	297	ENDIF
[9125]	298
[7646]	299	IF( l_ar5 ) THEN
[12276]	300	DEALLOCATE( zarea_ssh , zbotpres, z2d )
[9125]	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)
[13295]	326	DO_3D( 0, 0, 0, 0, 1, jpkm1 )
[12377]	327	z2d(ji,jj) = z2d(ji,jj) + puflx(ji,jj,jk)
	328	END_3D
[13226]	329	CALL lbc_lnk( 'diaar5', z2d, 'U', -1.0_wp )
[7646]	330	IF( cptr == 'adv' ) THEN
[12489]	331	IF( ktra == jp_tem ) CALL iom_put( 'uadv_heattr' , rho0_rcp * z2d ) ! advective heat transport in i-direction
	332	IF( ktra == jp_sal ) CALL iom_put( 'uadv_salttr' , rho0 * z2d ) ! advective salt transport in i-direction
[7646]	333	ENDIF
	334	IF( cptr == 'ldf' ) THEN
[12489]	335	IF( ktra == jp_tem ) CALL iom_put( 'udiff_heattr' , rho0_rcp * z2d ) ! diffusive heat transport in i-direction
	336	IF( ktra == jp_sal ) CALL iom_put( 'udiff_salttr' , rho0 * z2d ) ! diffusive salt transport in i-direction
[7646]	337	ENDIF
	338	!
[12377]	339	z2d(:,:) = pvflx(:,:,1)
[13295]	340	DO_3D( 0, 0, 0, 0, 1, jpkm1 )
[12377]	341	z2d(ji,jj) = z2d(ji,jj) + pvflx(ji,jj,jk)
	342	END_3D
[13226]	343	CALL lbc_lnk( 'diaar5', z2d, 'V', -1.0_wp )
[7646]	344	IF( cptr == 'adv' ) THEN
[12489]	345	IF( ktra == jp_tem ) CALL iom_put( 'vadv_heattr' , rho0_rcp * z2d ) ! advective heat transport in j-direction
	346	IF( ktra == jp_sal ) CALL iom_put( 'vadv_salttr' , rho0 * z2d ) ! advective salt transport in j-direction
[7646]	347	ENDIF
	348	IF( cptr == 'ldf' ) THEN
[12489]	349	IF( ktra == jp_tem ) CALL iom_put( 'vdiff_heattr' , rho0_rcp * z2d ) ! diffusive heat transport in j-direction
	350	IF( ktra == jp_sal ) CALL iom_put( 'vdiff_salttr' , rho0 * 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. &
[13089]	374	& iom_use( 'botpres' ) .OR. iom_use( 'sshthster' ) .OR. iom_use( 'sshsteric' ) .OR. &
	375	& iom_use( 'rhop' ) ) L_ar5 = .TRUE.
[7646]	376
	377	IF( l_ar5 ) THEN
	378	!
	379	! ! allocate dia_ar5 arrays
	380	IF( dia_ar5_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'dia_ar5_init : unable to allocate arrays' )
[2715]	381
[12630]	382	area_tot = glob_sum( 'diaar5', e1e2t(:,:) )
[1756]	383
[12276]	384	ALLOCATE( zvol0(jpi,jpj) )
	385	zvol0 (:,:) = 0._wp
[7753]	386	thick0(:,:) = 0._wp
[13295]	387	DO_3D( 1, 1, 1, 1, 1, jpkm1 )
[12377]	388	idep = tmask(ji,jj,jk) * e3t_0(ji,jj,jk)
[12630]	389	zvol0 (ji,jj) = zvol0 (ji,jj) + idep * e1e2t(ji,jj)
[12377]	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 )
[13286]	398	CALL iom_get ( inum, jpdom_global, 'vosaline' , zsaldta(:,:,:,1), 1 )
	399	CALL iom_get ( inum, jpdom_global, 'vosaline' , zsaldta(:,:,:,2), 12 )
[9125]	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
[13295]	405	DO_2D( 1, 1, 1, 1 )
[12377]	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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