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diaar5.F90 in NEMO/branches/2020/dev_r13327_KERNEL-06_2_techene_e3/src/OCE/DIA – NEMO

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source: NEMO/branches/2020/dev_r13327_KERNEL-06_2_techene_e3/src/OCE/DIA/diaar5.F90 @ 13998

Last change on this file since 13998 was 13998, checked in by techene, 3 years ago
branch updated with trunk 13787
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(:,: ) :: 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
[13998]	146	DO_2D( nn_hls, nn_hls, nn_hls, nn_hls )
	147	iks = mikt(ji,jj)
	148	zbotpres(ji,jj) = zbotpres(ji,jj) + ssh(ji,jj,Kmm) * zrhd(ji,jj,iks) + riceload(ji,jj)
	149	END_2D
[7646]	150	ELSE
[12377]	151	zbotpres(:,:) = zbotpres(:,:) + ssh(:,:,Kmm) * zrhd(:,:,1)
[7646]	152	END IF
[6140]	153	!!gm
	154	!!gm riceload should be added in both ln_linssh=T or F, no?
	155	!!gm
[7646]	156	END IF
	157	!
[12630]	158	zarho = glob_sum( 'diaar5', e1e2t(:,:) * zbotpres(:,:) )
[7646]	159	zssh_steric = - zarho / area_tot
	160	CALL iom_put( 'sshthster', zssh_steric )
[1756]	161
[7646]	162	! ! steric sea surface height
[7753]	163	zbotpres(:,:) = 0._wp ! no atmospheric surface pressure, levitating sea-ice
[7646]	164	DO jk = 1, jpkm1
[13089]	165	zbotpres(:,:) = zbotpres(:,:) + e3t(:,:,jk,Kmm) * rhd(:,:,jk)
[7646]	166	END DO
	167	IF( ln_linssh ) THEN
	168	IF ( ln_isfcav ) THEN
	169	DO ji = 1,jpi
	170	DO jj = 1,jpj
[12276]	171	iks = mikt(ji,jj)
[13089]	172	zbotpres(ji,jj) = zbotpres(ji,jj) + ssh(ji,jj,Kmm) * rhd(ji,jj,iks) + riceload(ji,jj)
[7646]	173	END DO
[5120]	174	END DO
[7646]	175	ELSE
[13089]	176	zbotpres(:,:) = zbotpres(:,:) + ssh(:,:,Kmm) * rhd(:,:,1)
[7646]	177	END IF
[5120]	178	END IF
[7646]	179	!
[12630]	180	zarho = glob_sum( 'diaar5', e1e2t(:,:) * zbotpres(:,:) )
[7646]	181	zssh_steric = - zarho / area_tot
	182	CALL iom_put( 'sshsteric', zssh_steric )
	183	! ! ocean bottom pressure
[12489]	184	zztmp = rho0 * grav * 1.e-4_wp ! recover pressure from pressure anomaly and cover to dbar = 1.e4 Pa
[12377]	185	zbotpres(:,:) = zztmp * ( zbotpres(:,:) + ssh(:,:,Kmm) + thick0(:,:) )
[7646]	186	CALL iom_put( 'botpres', zbotpres )
	187	!
[13237]	188	DEALLOCATE( zgdept )
	189	!
[7646]	190	ENDIF
[1756]	191
[7646]	192	IF( iom_use( 'masstot' ) .OR. iom_use( 'temptot' ) .OR. iom_use( 'saltot' ) ) THEN
[12276]	193	! ! Mean density anomalie, temperature and salinity
	194	ztsn(:,:,:,:) = 0._wp ! ztsn(:,:,1,jp_tem/sal) is used here as 2D Workspace for temperature & salinity
[13295]	195	DO_3D( 1, 1, 1, 1, 1, jpkm1 )
[12630]	196	zztmp = e1e2t(ji,jj) * e3t(ji,jj,jk,Kmm)
[12377]	197	ztsn(ji,jj,1,jp_tem) = ztsn(ji,jj,1,jp_tem) + zztmp * ts(ji,jj,jk,jp_tem,Kmm)
	198	ztsn(ji,jj,1,jp_sal) = ztsn(ji,jj,1,jp_sal) + zztmp * ts(ji,jj,jk,jp_sal,Kmm)
	199	END_3D
[12276]	200
	201	IF( ln_linssh ) THEN
[7646]	202	IF( ln_isfcav ) THEN
	203	DO ji = 1, jpi
	204	DO jj = 1, jpj
[12276]	205	iks = mikt(ji,jj)
[12377]	206	ztsn(ji,jj,1,jp_tem) = ztsn(ji,jj,1,jp_tem) + zarea_ssh(ji,jj) * ts(ji,jj,iks,jp_tem,Kmm)
	207	ztsn(ji,jj,1,jp_sal) = ztsn(ji,jj,1,jp_sal) + zarea_ssh(ji,jj) * ts(ji,jj,iks,jp_sal,Kmm)
[7646]	208	END DO
[5120]	209	END DO
[7646]	210	ELSE
[12377]	211	ztsn(:,:,1,jp_tem) = ztsn(:,:,1,jp_tem) + zarea_ssh(:,:) * ts(:,:,1,jp_tem,Kmm)
	212	ztsn(:,:,1,jp_sal) = ztsn(:,:,1,jp_sal) + zarea_ssh(:,:) * ts(:,:,1,jp_sal,Kmm)
[7646]	213	END IF
	214	ENDIF
	215	!
[12276]	216	ztemp = glob_sum( 'diaar5', ztsn(:,:,1,jp_tem) )
	217	zsal = glob_sum( 'diaar5', ztsn(:,:,1,jp_sal) )
[12489]	218	zmass = rho0 * ( zarho + zvol )
[7646]	219	!
	220	CALL iom_put( 'masstot', zmass )
[12276]	221	CALL iom_put( 'temptot', ztemp / zvol )
	222	CALL iom_put( 'saltot' , zsal / zvol )
[7646]	223	!
[12276]	224	ENDIF
	225
	226	IF( ln_teos10 ) THEN ! ! potential temperature (TEOS-10 case)
	227	IF( iom_use( 'toce_pot') .OR. iom_use( 'temptot_pot' ) .OR. iom_use( 'sst_pot' ) &
	228	.OR. iom_use( 'ssttot' ) .OR. iom_use( 'tosmint_pot' ) ) THEN
	229	!
	230	ALLOCATE( ztpot(jpi,jpj,jpk) )
	231	ztpot(:,:,jpk) = 0._wp
	232	DO jk = 1, jpkm1
[12377]	233	ztpot(:,:,jk) = eos_pt_from_ct( ts(:,:,jk,jp_tem,Kmm), ts(:,:,jk,jp_sal,Kmm) )
[12276]	234	END DO
	235	!
	236	CALL iom_put( 'toce_pot', ztpot(:,:,:) ) ! potential temperature (TEOS-10 case)
	237	CALL iom_put( 'sst_pot' , ztpot(:,:,1) ) ! surface temperature
	238	!
	239	IF( iom_use( 'temptot_pot' ) ) THEN ! Output potential temperature in case we use TEOS-10
	240	z2d(:,:) = 0._wp
	241	DO jk = 1, jpkm1
[12630]	242	z2d(:,:) = z2d(:,:) + e1e2t(:,:) * e3t(:,:,jk,Kmm) * ztpot(:,:,jk)
[12276]	243	END DO
	244	ztemp = glob_sum( 'diaar5', z2d(:,:) )
	245	CALL iom_put( 'temptot_pot', ztemp / zvol )
	246	ENDIF
	247	!
	248	IF( iom_use( 'ssttot' ) ) THEN ! Output potential temperature in case we use TEOS-10
[12630]	249	zsst = glob_sum( 'diaar5', e1e2t(:,:) * ztpot(:,:,1) )
[12276]	250	CALL iom_put( 'ssttot', zsst / area_tot )
	251	ENDIF
	252	! Vertical integral of temperature
	253	IF( iom_use( 'tosmint_pot') ) THEN
	254	z2d(:,:) = 0._wp
[13295]	255	DO_3D( 1, 1, 1, 1, 1, jpkm1 )
[12489]	256	z2d(ji,jj) = z2d(ji,jj) + rho0 * e3t(ji,jj,jk,Kmm) * ztpot(ji,jj,jk)
[12377]	257	END_3D
[12276]	258	CALL iom_put( 'tosmint_pot', z2d )
	259	ENDIF
	260	DEALLOCATE( ztpot )
	261	ENDIF
	262	ELSE
	263	IF( iom_use('ssttot') ) THEN ! Output sst in case we use EOS-80
[12630]	264	zsst = glob_sum( 'diaar5', e1e2t(:,:) * ts(:,:,1,jp_tem,Kmm) )
[12276]	265	CALL iom_put('ssttot', zsst / area_tot )
	266	ENDIF
[1756]	267	ENDIF
[7646]	268
	269	IF( iom_use( 'tnpeo' )) THEN
[12276]	270	! Work done against stratification by vertical mixing
	271	! Exclude points where rn2 is negative as convection kicks in here and
	272	! work is not being done against stratification
[9125]	273	ALLOCATE( zpe(jpi,jpj) )
[8078]	274	zpe(:,:) = 0._wp
[9019]	275	IF( ln_zdfddm ) THEN
[13295]	276	DO_3D( 1, 1, 1, 1, 2, jpk )
[12377]	277	IF( rn2(ji,jj,jk) > 0._wp ) THEN
	278	zrw = ( gdept(ji,jj,jk,Kmm) - gdepw(ji,jj,jk,Kmm) ) / e3w(ji,jj,jk,Kmm)
	279	!
	280	zaw = rab_n(ji,jj,jk,jp_tem) * (1. - zrw) + rab_n(ji,jj,jk-1,jp_tem)* zrw
	281	zbw = rab_n(ji,jj,jk,jp_sal) * (1. - zrw) + rab_n(ji,jj,jk-1,jp_sal)* zrw
	282	!
	283	zpe(ji, jj) = zpe(ji,jj) &
	284	& - grav * ( avt(ji,jj,jk) * zaw * (ts(ji,jj,jk-1,jp_tem,Kmm) - ts(ji,jj,jk,jp_tem,Kmm) ) &
	285	& - avs(ji,jj,jk) * zbw * (ts(ji,jj,jk-1,jp_sal,Kmm) - ts(ji,jj,jk,jp_sal,Kmm) ) )
	286	ENDIF
	287	END_3D
[7646]	288	ELSE
[13295]	289	DO_3D( 1, 1, 1, 1, 1, jpk )
[12489]	290	zpe(ji,jj) = zpe(ji,jj) + avt(ji,jj,jk) * MIN(0._wp,rn2(ji,jj,jk)) * rho0 * e3w(ji,jj,jk,Kmm)
[12377]	291	END_3D
[8078]	292	ENDIF
[9019]	293	CALL iom_put( 'tnpeo', zpe )
[9125]	294	DEALLOCATE( zpe )
[7646]	295	ENDIF
[9125]	296
[7646]	297	IF( l_ar5 ) THEN
[12276]	298	DEALLOCATE( zarea_ssh , zbotpres, z2d )
[9125]	299	DEALLOCATE( ztsn )
[7646]	300	ENDIF
[1756]	301	!
[9124]	302	IF( ln_timing ) CALL timing_stop('dia_ar5')
[3294]	303	!
[1756]	304	END SUBROUTINE dia_ar5
	305
[9124]	306
[12377]	307	SUBROUTINE dia_ar5_hst( ktra, cptr, puflx, pvflx )
[7646]	308	!!----------------------------------------------------------------------
	309	!! * ROUTINE dia_ar5_htr *
	310	!!----------------------------------------------------------------------
	311	!! Wrapper for heat transport calculations
	312	!! Called from all advection and/or diffusion routines
	313	!!----------------------------------------------------------------------
	314	INTEGER , INTENT(in ) :: ktra ! tracer index
	315	CHARACTER(len=3) , INTENT(in) :: cptr ! transport type 'adv'/'ldf'
[12377]	316	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(in) :: puflx ! u-flux of advection/diffusion
	317	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(in) :: pvflx ! v-flux of advection/diffusion
[7646]	318	!
	319	INTEGER :: ji, jj, jk
[9125]	320	REAL(wp), DIMENSION(jpi,jpj) :: z2d
[1756]	321
[7646]	322
[12377]	323	z2d(:,:) = puflx(:,:,1)
[13295]	324	DO_3D( 0, 0, 0, 0, 1, jpkm1 )
[12377]	325	z2d(ji,jj) = z2d(ji,jj) + puflx(ji,jj,jk)
	326	END_3D
[13226]	327	CALL lbc_lnk( 'diaar5', z2d, 'U', -1.0_wp )
[7646]	328	IF( cptr == 'adv' ) THEN
[12489]	329	IF( ktra == jp_tem ) CALL iom_put( 'uadv_heattr' , rho0_rcp * z2d ) ! advective heat transport in i-direction
	330	IF( ktra == jp_sal ) CALL iom_put( 'uadv_salttr' , rho0 * z2d ) ! advective salt transport in i-direction
[7646]	331	ENDIF
	332	IF( cptr == 'ldf' ) THEN
[12489]	333	IF( ktra == jp_tem ) CALL iom_put( 'udiff_heattr' , rho0_rcp * z2d ) ! diffusive heat transport in i-direction
	334	IF( ktra == jp_sal ) CALL iom_put( 'udiff_salttr' , rho0 * z2d ) ! diffusive salt transport in i-direction
[7646]	335	ENDIF
	336	!
[12377]	337	z2d(:,:) = pvflx(:,:,1)
[13295]	338	DO_3D( 0, 0, 0, 0, 1, jpkm1 )
[12377]	339	z2d(ji,jj) = z2d(ji,jj) + pvflx(ji,jj,jk)
	340	END_3D
[13226]	341	CALL lbc_lnk( 'diaar5', z2d, 'V', -1.0_wp )
[7646]	342	IF( cptr == 'adv' ) THEN
[12489]	343	IF( ktra == jp_tem ) CALL iom_put( 'vadv_heattr' , rho0_rcp * z2d ) ! advective heat transport in j-direction
	344	IF( ktra == jp_sal ) CALL iom_put( 'vadv_salttr' , rho0 * z2d ) ! advective salt transport in j-direction
[7646]	345	ENDIF
	346	IF( cptr == 'ldf' ) THEN
[12489]	347	IF( ktra == jp_tem ) CALL iom_put( 'vdiff_heattr' , rho0_rcp * z2d ) ! diffusive heat transport in j-direction
	348	IF( ktra == jp_sal ) CALL iom_put( 'vdiff_salttr' , rho0 * z2d ) ! diffusive salt transport in j-direction
[7646]	349	ENDIF
	350
	351	END SUBROUTINE dia_ar5_hst
	352
	353
[1756]	354	SUBROUTINE dia_ar5_init
	355	!!----------------------------------------------------------------------
	356	!! * ROUTINE dia_ar5_init *
	357	!!
[2528]	358	!! ** Purpose : initialization for AR5 diagnostic computation
[1756]	359	!!----------------------------------------------------------------------
	360	INTEGER :: inum
[12276]	361	INTEGER :: ik, idep
[1756]	362	INTEGER :: ji, jj, jk ! dummy loop indices
[7753]	363	REAL(wp) :: zztmp
[9125]	364	REAL(wp), ALLOCATABLE, DIMENSION(:,:,:,:) :: zsaldta ! Jan/Dec levitus salinity
[12276]	365	REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zvol0
[5253]	366	!
[1756]	367	!!----------------------------------------------------------------------
	368	!
[7646]	369	l_ar5 = .FALSE.
	370	IF( iom_use( 'voltot' ) .OR. iom_use( 'sshtot' ) .OR. iom_use( 'sshdyn' ) .OR. &
	371	& iom_use( 'masstot' ) .OR. iom_use( 'temptot' ) .OR. iom_use( 'saltot' ) .OR. &
[13089]	372	& iom_use( 'botpres' ) .OR. iom_use( 'sshthster' ) .OR. iom_use( 'sshsteric' ) .OR. &
	373	& iom_use( 'rhop' ) ) L_ar5 = .TRUE.
[7646]	374
	375	IF( l_ar5 ) THEN
	376	!
	377	! ! allocate dia_ar5 arrays
	378	IF( dia_ar5_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'dia_ar5_init : unable to allocate arrays' )
[2715]	379
[12630]	380	area_tot = glob_sum( 'diaar5', e1e2t(:,:) )
[1756]	381
[12276]	382	ALLOCATE( zvol0(jpi,jpj) )
	383	zvol0 (:,:) = 0._wp
[7753]	384	thick0(:,:) = 0._wp
[13998]	385	DO_3D( 1, 1, 1, 1, 1, jpkm1 ) ! interpolation of salinity at the last ocean level (i.e. the partial step)
[12377]	386	idep = tmask(ji,jj,jk) * e3t_0(ji,jj,jk)
[12630]	387	zvol0 (ji,jj) = zvol0 (ji,jj) + idep * e1e2t(ji,jj)
[12377]	388	thick0(ji,jj) = thick0(ji,jj) + idep
	389	END_3D
[12276]	390	vol0 = glob_sum( 'diaar5', zvol0 )
	391	DEALLOCATE( zvol0 )
[5253]	392
[9125]	393	IF( iom_use( 'sshthster' ) ) THEN
[12276]	394	ALLOCATE( zsaldta(jpi,jpj,jpk,jpts) )
[9125]	395	CALL iom_open ( 'sali_ref_clim_monthly', inum )
[13286]	396	CALL iom_get ( inum, jpdom_global, 'vosaline' , zsaldta(:,:,:,1), 1 )
	397	CALL iom_get ( inum, jpdom_global, 'vosaline' , zsaldta(:,:,:,2), 12 )
[9125]	398	CALL iom_close( inum )
[6665]	399
[9125]	400	sn0(:,:,:) = 0.5_wp * ( zsaldta(:,:,:,1) + zsaldta(:,:,:,2) )
	401	sn0(:,:,:) = sn0(:,:,:) * tmask(:,:,:)
	402	IF( ln_zps ) THEN ! z-coord. partial steps
[13998]	403	DO_2D( 1, 1, 1, 1 ) ! interpolation of salinity at the last ocean level (i.e. the partial step)
[12377]	404	ik = mbkt(ji,jj)
	405	IF( ik > 1 ) THEN
	406	zztmp = ( gdept_1d(ik) - gdept_0(ji,jj,ik) ) / ( gdept_1d(ik) - gdept_1d(ik-1) )
	407	sn0(ji,jj,ik) = ( 1._wp - zztmp ) * sn0(ji,jj,ik) + zztmp * sn0(ji,jj,ik-1)
	408	ENDIF
	409	END_2D
[9125]	410	ENDIF
	411	!
	412	DEALLOCATE( zsaldta )
[7646]	413	ENDIF
	414	!
[1756]	415	ENDIF
	416	!
	417	END SUBROUTINE dia_ar5_init
	418
	419	!!======================================================================
	420	END MODULE diaar5

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