New URL for NEMO forge! http://forge.nemo-ocean.eu

Since March 2022 along with NEMO 4.2 release, the code development moved to a self-hosted GitLab.
This present forge is now archived and remained online for history.

istate.F90 in branches/2013/dev_LOCEAN_CMCC_INGV_MERC_UKMO_2013/NEMOGCM/NEMO/OPA_SRC/DOM – NEMO

Context Navigation

source: branches/2013/dev_LOCEAN_CMCC_INGV_MERC_UKMO_2013/NEMOGCM/NEMO/OPA_SRC/DOM/istate.F90 @ 4247

Last change on this file since 4247 was 4245, checked in by cetlod, 11 years ago
dev_locean_cmcc_ingv_ukmo_merc : merge in the MERC_UKMO dev branch with trunk rev 4119
Property svn:keywords set to `Id`
File size: 26.0 KB

Rev	Line
[3]	1	MODULE istate
	2	!!======================================================================
	3	!! * MODULE istate *
	4	!! Ocean state : initial state setting
	5	!!=====================================================================
[2104]	6	!! History : OPA ! 1989-12 (P. Andrich) Original code
	7	!! 5.0 ! 1991-11 (G. Madec) rewritting
	8	!! 6.0 ! 1996-01 (G. Madec) terrain following coordinates
	9	!! 8.0 ! 2001-09 (M. Levy, M. Ben Jelloul) istate_eel
	10	!! 8.0 ! 2001-09 (M. Levy, M. Ben Jelloul) istate_uvg
	11	!! NEMO 1.0 ! 2003-08 (G. Madec, C. Talandier) F90: Free form, modules + EEL R5
	12	!! - ! 2004-05 (A. Koch-Larrouy) istate_gyre
	13	!! 2.0 ! 2006-07 (S. Masson) distributed restart using iom
	14	!! 3.3 ! 2010-10 (C. Ethe) merge TRC-TRA
[3294]	15	!! 3.4 ! 2011-04 (G. Madec) Merge of dtatem and dtasal & suppression of tb,tn/sb,sn
[508]	16	!!----------------------------------------------------------------------
[3]	17
	18	!!----------------------------------------------------------------------
	19	!! istate_init : initial state setting
	20	!! istate_tem : analytical profile for initial Temperature
	21	!! istate_sal : analytical profile for initial Salinity
	22	!! istate_eel : initial state setting of EEL R5 configuration
[93]	23	!! istate_gyre : initial state setting of GYRE configuration
[3]	24	!! istate_uvg : initial velocity in geostropic balance
	25	!!----------------------------------------------------------------------
	26	USE oce ! ocean dynamics and active tracers
	27	USE dom_oce ! ocean space and time domain
[4245]	28	USE c1d ! 1D vertical configuration
[2104]	29	USE daymod ! calendar
	30	USE eosbn2 ! eq. of state, Brunt Vaisala frequency (eos routine)
[3]	31	USE ldftra_oce ! ocean active tracers: lateral physics
	32	USE zdf_oce ! ocean vertical physics
	33	USE phycst ! physical constants
[3294]	34	USE dtatsd ! data temperature and salinity (dta_tsd routine)
[4245]	35	USE dtauvd ! data: U & V current (dta_uvd routine)
[508]	36	USE in_out_manager ! I/O manager
[2104]	37	USE iom ! I/O library
[544]	38	USE zpshde ! partial step: hor. derivative (zps_hde routine)
	39	USE eosbn2 ! equation of state (eos bn2 routine)
[593]	40	USE domvvl ! varying vertical mesh
	41	USE dynspg_oce ! pressure gradient schemes
	42	USE dynspg_flt ! pressure gradient schemes
	43	USE dynspg_exp ! pressure gradient schemes
	44	USE dynspg_ts ! pressure gradient schemes
[3764]	45	USE sol_oce ! ocean solver variables
[2715]	46	USE lib_mpp ! MPP library
[3680]	47	USE restart ! restart
[3294]	48	USE wrk_nemo ! Memory allocation
	49	USE timing ! Timing
[2715]	50
[3]	51	IMPLICIT NONE
	52	PRIVATE
	53
[508]	54	PUBLIC istate_init ! routine called by step.F90
[3]	55
	56	!! * Substitutions
	57	# include "domzgr_substitute.h90"
	58	# include "vectopt_loop_substitute.h90"
	59	!!----------------------------------------------------------------------
[2287]	60	!! NEMO/OPA 3.3 , NEMO Consortium (2010)
[888]	61	!! $Id$
[2715]	62	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
[3]	63	!!----------------------------------------------------------------------
	64	CONTAINS
	65
	66	SUBROUTINE istate_init
	67	!!----------------------------------------------------------------------
	68	!! * ROUTINE istate_init *
	69	!!
[508]	70	!! ** Purpose : Initialization of the dynamics and tracer fields.
[3]	71	!!----------------------------------------------------------------------
[2148]	72	! - ML - needed for initialization of e3t_b
	73	INTEGER :: jk ! dummy loop indice
[4245]	74	REAL(wp), POINTER, DIMENSION(:,:,:,:) :: zuvd ! U & V data workspace
[3294]	75	!!----------------------------------------------------------------------
	76	!
	77	IF( nn_timing == 1 ) CALL timing_start('istate_init')
	78	!
[3]	79
[508]	80	IF(lwp) WRITE(numout,*)
	81	IF(lwp) WRITE(numout,*) 'istate_ini : Initialization of the dynamics and tracers'
	82	IF(lwp) WRITE(numout,*) '~~~~~~~~~~'
[3]	83
[3294]	84	CALL dta_tsd_init ! Initialisation of T & S input data
[4245]	85	IF( lk_c1d ) CALL dta_uvd_init ! Initialization of U & V input data
[3]	86
[3294]	87	rhd (:,:,: ) = 0.e0
	88	rhop (:,:,: ) = 0.e0
	89	rn2 (:,:,: ) = 0.e0
	90	tsa (:,:,:,:) = 0.e0
	91
[15]	92	IF( ln_rstart ) THEN ! Restart from a file
[3]	93	! ! -------------------
	94	neuler = 1 ! Set time-step indicator at nit000 (leap-frog)
	95	CALL rst_read ! Read the restart file
[3294]	96	! ! define e3u_b, e3v_b from e3t_b read in restart file
	97	CALL dom_vvl_2( nit000, fse3u_b(:,:,:), fse3v_b(:,:,:) )
[1130]	98	CALL day_init ! model calendar (using both namelist and restart infos)
[3]	99	ELSE
	100	! ! Start from rest
	101	! ! ---------------
[1130]	102	numror = 0 ! define numror = 0 -> no restart file to read
[3]	103	neuler = 0 ! Set time-step indicator at nit000 (euler forward)
[1130]	104	CALL day_init ! model calendar (using both namelist and restart infos)
[508]	105	! ! Initialization of ocean to zero
[3294]	106	! before fields ! now fields
	107	sshb (:,:) = 0._wp ; sshn (:,:) = 0._wp
	108	ub (:,:,:) = 0._wp ; un (:,:,:) = 0._wp
	109	vb (:,:,:) = 0._wp ; vn (:,:,:) = 0._wp
	110	rotb (:,:,:) = 0._wp ; rotn (:,:,:) = 0._wp
	111	hdivb(:,:,:) = 0._wp ; hdivn(:,:,:) = 0._wp
[508]	112	!
[3]	113	IF( cp_cfg == 'eel' ) THEN
[2104]	114	CALL istate_eel ! EEL configuration : start from pre-defined U,V T-S fields
[434]	115	ELSEIF( cp_cfg == 'gyre' ) THEN
[2104]	116	CALL istate_gyre ! GYRE configuration : start from pre-defined T-S fields
[4245]	117	ELSE ! Initial T-S, U-V fields read in files
	118	IF ( ln_tsd_init ) THEN ! read 3D T and S data at nit000
	119	CALL dta_tsd( nit000, tsb )
	120	tsn(:,:,:,:) = tsb(:,:,:,:)
	121	!
	122	ELSE ! Initial T-S fields defined analytically
	123	CALL istate_t_s
	124	ENDIF
	125	IF ( ln_uvd_init .AND. lk_c1d ) THEN ! read 3D U and V data at nit000
	126	CALL wrk_alloc( jpi, jpj, jpk, 2, zuvd )
	127	CALL dta_uvd( nit000, zuvd )
	128	ub(:,:,:) = zuvd(:,:,:,1) ; un(:,:,:) = ub(:,:,:)
	129	vb(:,:,:) = zuvd(:,:,:,2) ; vn(:,:,:) = vb(:,:,:)
	130	CALL wrk_dealloc( jpi, jpj, jpk, 2, zuvd )
	131	ENDIF
[3]	132	ENDIF
[2104]	133	!
[2082]	134	CALL eos( tsb, rhd, rhop ) ! before potential and in situ densities
[2236]	135	#if ! defined key_c1d
	136	IF( ln_zps ) CALL zps_hde( nit000, jpts, tsb, gtsu, gtsv, & ! zps: before hor. gradient
	137	& rhd, gru , grv ) ! of t,s,rd at ocean bottom
	138	#endif
[2148]	139	!
	140	! - ML - sshn could be modified by istate_eel, so that initialization of fse3t_b is done here
	141	IF( lk_vvl ) THEN
	142	DO jk = 1, jpk
	143	fse3t_b(:,:,jk) = fse3t_n(:,:,jk)
	144	ENDDO
	145	ENDIF
[3764]	146	! ! define e3u_b, e3v_b from e3t_b initialized in domzgr
	147	CALL dom_vvl_2( nit000, fse3u_b(:,:,:), fse3v_b(:,:,:) )
[2148]	148	!
[3]	149	ENDIF
[1438]	150	!
[2104]	151	IF( lk_agrif ) THEN ! read free surface arrays in restart file
[593]	152	IF( ln_rstart ) THEN
[3764]	153	IF( lk_dynspg_flt ) THEN ! read or initialize the following fields
	154	! ! gcx, gcxb for agrif_opa_init
	155	IF( sol_oce_alloc() > 0 ) CALL ctl_stop('agrif sol_oce_alloc: allocation of arrays failed')
	156	CALL flt_rst( nit000, 'READ' )
	157	ENDIF
	158	ENDIF ! explicit case not coded yet with AGRIF
[1200]	159	ENDIF
[508]	160	!
[3294]	161	IF( nn_timing == 1 ) CALL timing_stop('istate_init')
	162	!
[3]	163	END SUBROUTINE istate_init
	164
[3294]	165	SUBROUTINE istate_t_s
[3]	166	!!---------------------------------------------------------------------
[3294]	167	!! * ROUTINE istate_t_s *
[3]	168	!!
	169	!! ** Purpose : Intialization of the temperature field with an
	170	!! analytical profile or a file (i.e. in EEL configuration)
	171	!!
[3294]	172	!! ** Method : - temperature: use Philander analytic profile
	173	!! - salinity : use to a constant value 35.5
[3]	174	!!
	175	!! References : Philander ???
	176	!!----------------------------------------------------------------------
[3294]	177	INTEGER :: ji, jj, jk
	178	REAL(wp) :: zsal = 35.50
[3]	179	!!----------------------------------------------------------------------
[508]	180	!
[3]	181	IF(lwp) WRITE(numout,*)
[3294]	182	IF(lwp) WRITE(numout,*) 'istate_t_s : Philander s initial temperature profile'
	183	IF(lwp) WRITE(numout,*) '~~~~~~~~~~ and constant salinity (',zsal,' psu)'
[2104]	184	!
[3]	185	DO jk = 1, jpk
[3294]	186	tsn(:,:,jk,jp_tem) = ( ( ( 7.5 - 0. * ABS( gphit(:,:) )/30. ) * ( 1.-TANH((fsdept(:,:,jk)-80.)/30.) ) &
	187	& + 10. * ( 5000. - fsdept(:,:,jk) ) /5000.) ) * tmask(:,:,jk)
	188	tsb(:,:,jk,jp_tem) = tsn(:,:,jk,jp_tem)
[3]	189	END DO
[3294]	190	tsn(:,:,:,jp_sal) = zsal * tmask(:,:,:)
	191	tsb(:,:,:,jp_sal) = tsn(:,:,:,jp_sal)
[2104]	192	!
[3294]	193	END SUBROUTINE istate_t_s
[3]	194
	195	SUBROUTINE istate_eel
	196	!!----------------------------------------------------------------------
	197	!! * ROUTINE istate_eel *
	198	!!
	199	!! ** Purpose : Initialization of the dynamics and tracers for EEL R5
	200	!! configuration (channel with or without a topographic bump)
	201	!!
	202	!! ** Method : - set temprature field
	203	!! - set salinity field
	204	!! - set velocity field including horizontal divergence
	205	!! and relative vorticity fields
	206	!!----------------------------------------------------------------------
	207	USE divcur ! hor. divergence & rel. vorticity (div_cur routine)
[473]	208	USE iom
[3]	209
	210	INTEGER :: inum ! temporary logical unit
	211	INTEGER :: ji, jj, jk ! dummy loop indices
[479]	212	INTEGER :: ijloc
[508]	213	REAL(wp) :: zh1, zh2, zslope, zcst, zfcor ! temporary scalars
[2104]	214	REAL(wp) :: zt1 = 15._wp ! surface temperature value (EEL R5)
	215	REAL(wp) :: zt2 = 5._wp ! bottom temperature value (EEL R5)
	216	REAL(wp) :: zsal = 35.0_wp ! constant salinity (EEL R2, R5 and R6)
	217	REAL(wp) :: zueel = 0.1_wp ! constant uniform zonal velocity (EEL R5)
[508]	218	REAL(wp), DIMENSION(jpiglo,jpjglo) :: zssh ! initial ssh over the global domain
[3]	219	!!----------------------------------------------------------------------
	220
	221	SELECT CASE ( jp_cfg )
	222	! ! ====================
	223	CASE ( 5 ) ! EEL R5 configuration
	224	! ! ====================
[2104]	225	!
[3]	226	! set temperature field with a linear profile
	227	! -------------------------------------------
	228	IF(lwp) WRITE(numout,*)
	229	IF(lwp) WRITE(numout,*) 'istate_eel : EEL R5: linear temperature profile'
	230	IF(lwp) WRITE(numout,*) '~~~~~~~~~~'
[2104]	231	!
[467]	232	zh1 = gdept_0( 1 )
	233	zh2 = gdept_0(jpkm1)
[2104]	234	!
[3]	235	zslope = ( zt1 - zt2 ) / ( zh1 - zh2 )
	236	zcst = ( zt1 * ( zh1 - zh2) - ( zt1 - zt2 ) * zh1 ) / ( zh1 - zh2 )
[2104]	237	!
[3]	238	DO jk = 1, jpk
[3294]	239	tsn(:,:,jk,jp_tem) = ( zt2 + zt1 * exp( - fsdept(:,:,jk) / 1000 ) ) * tmask(:,:,jk)
	240	tsb(:,:,jk,jp_tem) = tsn(:,:,jk,jp_tem)
[3]	241	END DO
[2104]	242	!
[3294]	243	IF(lwp) CALL prizre( tsn(:,:,:,jp_tem), jpi , jpj , jpk , jpj/2 , &
	244	& 1 , jpi , 5 , 1 , jpk , &
	245	& 1 , 1. , numout )
[2104]	246	!
[3]	247	! set salinity field to a constant value
	248	! --------------------------------------
	249	IF(lwp) WRITE(numout,*)
	250	IF(lwp) WRITE(numout,*) 'istate_eel : EEL R5: constant salinity field, S = ', zsal
	251	IF(lwp) WRITE(numout,*) '~~~~~~~~~~'
[2104]	252	!
[3294]	253	tsn(:,:,:,jp_sal) = zsal * tmask(:,:,:)
	254	tsb(:,:,:,jp_sal) = tsn(:,:,:,jp_sal)
[2104]	255	!
[3]	256	! set the dynamics: U,V, hdiv, rot (and ssh if necessary)
	257	! ----------------
	258	! Start EEL5 configuration with barotropic geostrophic velocities
	259	! according the sshb and sshn SSH imposed.
[479]	260	! we assume a uniform grid (hence the use of e1t(1,1) for delta_y)
	261	! we use the Coriolis frequency at mid-channel.
	262	ub(:,:,:) = zueel * umask(:,:,:)
[3]	263	un(:,:,:) = ub(:,:,:)
[479]	264	ijloc = mj0(INT(jpjglo-1)/2)
	265	zfcor = ff(1,ijloc)
[2104]	266	!
[3]	267	DO jj = 1, jpjglo
[479]	268	zssh(:,jj) = - (FLOAT(jj)- FLOAT(jpjglo-1)/2.)zueele1t(1,1)*zfcor/grav
[3]	269	END DO
[2104]	270	!
[479]	271	IF(lwp) THEN
	272	WRITE(numout,*) ' Uniform zonal velocity for EEL R5:',zueel
	273	WRITE(numout,*) ' Geostrophic SSH profile as a function of y:'
	274	WRITE(numout,'(12(1x,f6.2))') zssh(1,:)
	275	ENDIF
[2104]	276	!
[3]	277	DO jj = 1, nlcj
	278	DO ji = 1, nlci
	279	sshb(ji,jj) = zssh( mig(ji) , mjg(jj) ) * tmask(ji,jj,1)
	280	END DO
	281	END DO
	282	sshb(nlci+1:jpi, : ) = 0.e0 ! set to zero extra mpp columns
	283	sshb( : ,nlcj+1:jpj) = 0.e0 ! set to zero extra mpp rows
[2104]	284	!
[3]	285	sshn(:,:) = sshb(:,:) ! set now ssh to the before value
[2104]	286	!
[593]	287	IF( nn_rstssh /= 0 ) THEN
[2104]	288	nn_rstssh = 0 ! hand-made initilization of ssh
[593]	289	CALL ctl_warn( 'istate_eel: force nn_rstssh = 0' )
[558]	290	ENDIF
[2104]	291	!
	292	CALL div_cur( nit000 ) ! horizontal divergence and relative vorticity (curl)
[3]	293	! N.B. the vertical velocity will be computed from the horizontal divergence field
	294	! in istate by a call to wzv routine
	295
	296
	297	! ! ==========================
	298	CASE ( 2 , 6 ) ! EEL R2 or R6 configuration
	299	! ! ==========================
[2104]	300	!
[3]	301	! set temperature field with a NetCDF file
	302	! ----------------------------------------
	303	IF(lwp) WRITE(numout,*)
	304	IF(lwp) WRITE(numout,*) 'istate_eel : EEL R2 or R6: read initial temperature in a NetCDF file'
	305	IF(lwp) WRITE(numout,*) '~~~~~~~~~~'
[2104]	306	!
[473]	307	CALL iom_open ( 'eel.initemp', inum )
[3294]	308	CALL iom_get ( inum, jpdom_data, 'initemp', tsb(:,:,:,jp_tem) ) ! read before temprature (tb)
[473]	309	CALL iom_close( inum )
[2104]	310	!
[3294]	311	tsn(:,:,:,jp_tem) = tsb(:,:,:,jp_tem) ! set nox temperature to tb
[2104]	312	!
[3294]	313	IF(lwp) CALL prizre( tsn(:,:,:,jp_tem), jpi , jpj , jpk , jpj/2 , &
	314	& 1 , jpi , 5 , 1 , jpk , &
	315	& 1 , 1. , numout )
[2104]	316	!
[3]	317	! set salinity field to a constant value
	318	! --------------------------------------
	319	IF(lwp) WRITE(numout,*)
	320	IF(lwp) WRITE(numout,*) 'istate_eel : EEL R5: constant salinity field, S = ', zsal
	321	IF(lwp) WRITE(numout,*) '~~~~~~~~~~'
[2104]	322	!
[3294]	323	tsn(:,:,:,jp_sal) = zsal * tmask(:,:,:)
	324	tsb(:,:,:,jp_sal) = tsn(:,:,:,jp_sal)
[2104]	325	!
[3]	326	! ! ===========================
	327	CASE DEFAULT ! NONE existing configuration
	328	! ! ===========================
[473]	329	WRITE(ctmp1,*) 'EEL with a ', jp_cfg,' km resolution is not coded'
	330	CALL ctl_stop( ctmp1 )
[2104]	331	!
[3]	332	END SELECT
[2104]	333	!
[3]	334	END SUBROUTINE istate_eel
	335
	336
[93]	337	SUBROUTINE istate_gyre
	338	!!----------------------------------------------------------------------
	339	!! * ROUTINE istate_gyre *
	340	!!
	341	!! ** Purpose : Initialization of the dynamics and tracers for GYRE
	342	!! configuration (double gyre with rotated domain)
	343	!!
	344	!! ** Method : - set temprature field
	345	!! - set salinity field
	346	!!----------------------------------------------------------------------
[473]	347	INTEGER :: ji, jj, jk ! dummy loop indices
[508]	348	INTEGER :: inum ! temporary logical unit
	349	INTEGER, PARAMETER :: ntsinit = 0 ! (0/1) (analytical/input data files) T&S initialization
[93]	350	!!----------------------------------------------------------------------
	351
[434]	352	SELECT CASE ( ntsinit)
[93]	353
[434]	354	CASE ( 0 ) ! analytical T/S profil deduced from LEVITUS
	355	IF(lwp) WRITE(numout,*)
	356	IF(lwp) WRITE(numout,*) 'istate_gyre : initial analytical T and S profil deduced from LEVITUS '
	357	IF(lwp) WRITE(numout,*) '~~~~~~~~~~~'
[93]	358
[434]	359	DO jk = 1, jpk
	360	DO jj = 1, jpj
	361	DO ji = 1, jpi
[3294]	362	tsn(ji,jj,jk,jp_tem) = ( 16. - 12. * TANH( (fsdept(ji,jj,jk) - 400) / 700 ) ) &
[434]	363	& * (-TANH( (500-fsdept(ji,jj,jk)) / 150 ) + 1) / 2 &
	364	& + ( 15. * ( 1. - TANH( (fsdept(ji,jj,jk)-50.) / 1500.) ) &
	365	& - 1.4 * TANH((fsdept(ji,jj,jk)-100.) / 100.) &
	366	& + 7. * (1500. - fsdept(ji,jj,jk)) / 1500. ) &
	367	& * (-TANH( (fsdept(ji,jj,jk) - 500) / 150) + 1) / 2
[3294]	368	tsn(ji,jj,jk,jp_tem) = tsn(ji,jj,jk,jp_tem) * tmask(ji,jj,jk)
	369	tsb(ji,jj,jk,jp_tem) = tsn(ji,jj,jk,jp_tem)
[434]	370
[3294]	371	tsn(ji,jj,jk,jp_sal) = ( 36.25 - 1.13 * TANH( (fsdept(ji,jj,jk) - 305) / 460 ) ) &
[434]	372	& * (-TANH((500 - fsdept(ji,jj,jk)) / 150) + 1) / 2 &
	373	& + ( 35.55 + 1.25 * (5000. - fsdept(ji,jj,jk)) / 5000. &
	374	& - 1.62 * TANH( (fsdept(ji,jj,jk) - 60. ) / 650. ) &
	375	& + 0.2 * TANH( (fsdept(ji,jj,jk) - 35. ) / 100. ) &
	376	& + 0.2 * TANH( (fsdept(ji,jj,jk) - 1000.) / 5000.) ) &
	377	& * (-TANH((fsdept(ji,jj,jk) - 500) / 150) + 1) / 2
[3294]	378	tsn(ji,jj,jk,jp_sal) = tsn(ji,jj,jk,jp_sal) * tmask(ji,jj,jk)
	379	tsb(ji,jj,jk,jp_sal) = tsn(ji,jj,jk,jp_sal)
[434]	380	END DO
[93]	381	END DO
	382	END DO
	383
[434]	384	CASE ( 1 ) ! T/S data fields read in dta_tem.nc/data_sal.nc files
	385	IF(lwp) WRITE(numout,*)
	386	IF(lwp) WRITE(numout,*) 'istate_gyre : initial T and S read from dta_tem.nc/data_sal.nc files'
	387	IF(lwp) WRITE(numout,*) '~~~~~~~~~~~'
	388	IF(lwp) WRITE(numout,*) ' NetCDF FORMAT'
	389
	390	! Read temperature field
	391	! ----------------------
[473]	392	CALL iom_open ( 'data_tem', inum )
[3294]	393	CALL iom_get ( inum, jpdom_data, 'votemper', tsn(:,:,:,jp_tem) )
[473]	394	CALL iom_close( inum )
[434]	395
[3294]	396	tsn(:,:,:,jp_tem) = tsn(:,:,:,jp_tem) * tmask(:,:,:)
	397	tsb(:,:,:,jp_tem) = tsn(:,:,:,jp_tem)
[434]	398
	399	! Read salinity field
	400	! -------------------
[473]	401	CALL iom_open ( 'data_sal', inum )
[3294]	402	CALL iom_get ( inum, jpdom_data, 'vosaline', tsn(:,:,:,jp_sal) )
[473]	403	CALL iom_close( inum )
[434]	404
[3294]	405	tsn(:,:,:,jp_sal) = tsn(:,:,:,jp_sal) * tmask(:,:,:)
	406	tsb(:,:,:,jp_sal) = tsn(:,:,:,jp_sal)
[434]	407
	408	END SELECT
	409
[93]	410	IF(lwp) THEN
	411	WRITE(numout,*)
	412	WRITE(numout,*) ' Initial temperature and salinity profiles:'
[467]	413	WRITE(numout, "(9x,' level gdept_0 temperature salinity ')" )
[3294]	414	WRITE(numout, "(10x, i4, 3f10.2)" ) ( jk, gdept_0(jk), tsn(2,2,jk,jp_tem), tsn(2,2,jk,jp_sal), jk = 1, jpk )
[93]	415	ENDIF
	416
	417	END SUBROUTINE istate_gyre
	418
[3]	419	SUBROUTINE istate_uvg
	420	!!----------------------------------------------------------------------
	421	!! * ROUTINE istate_uvg *
	422	!!
	423	!! ** Purpose : Compute the geostrophic velocities from (tn,sn) fields
	424	!!
	425	!! ** Method : Using the hydrostatic hypothesis the now hydrostatic
	426	!! pressure is computed by integrating the in-situ density from the
	427	!! surface to the bottom.
	428	!! p=integral [ rau*g dz ]
	429	!!----------------------------------------------------------------------
[359]	430	USE dynspg ! surface pressure gradient (dyn_spg routine)
[3]	431	USE divcur ! hor. divergence & rel. vorticity (div_cur routine)
	432	USE lbclnk ! ocean lateral boundary condition (or mpp link)
	433
	434	INTEGER :: ji, jj, jk ! dummy loop indices
	435	INTEGER :: indic ! ???
[508]	436	REAL(wp) :: zmsv, zphv, zmsu, zphu, zalfg ! temporary scalars
[3294]	437	REAL(wp), POINTER, DIMENSION(:,:,:) :: zprn
[3]	438	!!----------------------------------------------------------------------
[3294]	439	!
	440	CALL wrk_alloc( jpi, jpj, jpk, zprn)
	441	!
[3]	442	IF(lwp) WRITE(numout,*)
	443	IF(lwp) WRITE(numout,*) 'istate_uvg : Start from Geostrophy'
	444	IF(lwp) WRITE(numout,*) '~~~~~~~~~~'
	445
	446	! Compute the now hydrostatic pressure
	447	! ------------------------------------
	448
[15]	449	zalfg = 0.5 * grav * rau0
[508]	450
	451	zprn(:,:,1) = zalfg * fse3w(:,:,1) * ( 1 + rhd(:,:,1) ) ! Surface value
[3]	452
[508]	453	DO jk = 2, jpkm1 ! Vertical integration from the surface
[3]	454	zprn(:,:,jk) = zprn(:,:,jk-1) &
[359]	455	& + zalfg * fse3w(:,:,jk) * ( 2. + rhd(:,:,jk) + rhd(:,:,jk-1) )
[3]	456	END DO
	457
	458	! Compute geostrophic balance
	459	! ---------------------------
	460	DO jk = 1, jpkm1
	461	DO jj = 2, jpjm1
	462	DO ji = fs_2, fs_jpim1 ! vertor opt.
	463	zmsv = 1. / MAX( umask(ji-1,jj+1,jk) + umask(ji ,jj+1,jk) &
	464	+ umask(ji-1,jj ,jk) + umask(ji ,jj ,jk) , 1. )
	465	zphv = ( zprn(ji ,jj+1,jk) - zprn(ji-1,jj+1,jk) ) * umask(ji-1,jj+1,jk) / e1u(ji-1,jj+1) &
	466	+ ( zprn(ji+1,jj+1,jk) - zprn(ji ,jj+1,jk) ) * umask(ji ,jj+1,jk) / e1u(ji ,jj+1) &
	467	+ ( zprn(ji ,jj ,jk) - zprn(ji-1,jj ,jk) ) * umask(ji-1,jj ,jk) / e1u(ji-1,jj ) &
	468	+ ( zprn(ji+1,jj ,jk) - zprn(ji ,jj ,jk) ) * umask(ji ,jj ,jk) / e1u(ji ,jj )
	469	zphv = 1. / rau0 * zphv * zmsv * vmask(ji,jj,jk)
	470
	471	zmsu = 1. / MAX( vmask(ji+1,jj ,jk) + vmask(ji ,jj ,jk) &
	472	+ vmask(ji+1,jj-1,jk) + vmask(ji ,jj-1,jk) , 1. )
	473	zphu = ( zprn(ji+1,jj+1,jk) - zprn(ji+1,jj ,jk) ) * vmask(ji+1,jj ,jk) / e2v(ji+1,jj ) &
	474	+ ( zprn(ji ,jj+1,jk) - zprn(ji ,jj ,jk) ) * vmask(ji ,jj ,jk) / e2v(ji ,jj ) &
	475	+ ( zprn(ji+1,jj ,jk) - zprn(ji+1,jj-1,jk) ) * vmask(ji+1,jj-1,jk) / e2v(ji+1,jj-1) &
	476	+ ( zprn(ji ,jj ,jk) - zprn(ji ,jj-1,jk) ) * vmask(ji ,jj-1,jk) / e2v(ji ,jj-1)
	477	zphu = 1. / rau0 * zphu * zmsu * umask(ji,jj,jk)
	478
	479	! Compute the geostrophic velocities
	480	un(ji,jj,jk) = -2. * zphu / ( ff(ji,jj) + ff(ji ,jj-1) )
	481	vn(ji,jj,jk) = 2. * zphv / ( ff(ji,jj) + ff(ji-1,jj ) )
	482	END DO
	483	END DO
	484	END DO
	485
	486	IF(lwp) WRITE(numout,*) ' we force to zero bottom velocity'
	487
	488	! Susbtract the bottom velocity (level jpk-1 for flat bottom case)
	489	! to have a zero bottom velocity
	490
	491	DO jk = 1, jpkm1
	492	un(:,:,jk) = ( un(:,:,jk) - un(:,:,jpkm1) ) * umask(:,:,jk)
	493	vn(:,:,jk) = ( vn(:,:,jk) - vn(:,:,jpkm1) ) * vmask(:,:,jk)
	494	END DO
	495
	496	CALL lbc_lnk( un, 'U', -1. )
	497	CALL lbc_lnk( vn, 'V', -1. )
	498
	499	ub(:,:,:) = un(:,:,:)
	500	vb(:,:,:) = vn(:,:,:)
	501
	502	! WARNING !!!!!
	503	! after initializing u and v, we need to calculate the initial streamfunction bsf.
	504	! Otherwise, only the trend will be computed and the model will blow up (inconsistency).
	505	! to do that, we call dyn_spg with a special trick:
[508]	506	! we fill ua and va with the velocities divided by dt, and the streamfunction will be brought to the
	507	! right value assuming the velocities have been set up in one time step.
	508	! we then set bsfd to zero (first guess for next step is d(psi)/dt = 0.)
	509	! sets up s false trend to calculate the barotropic streamfunction.
[3]	510
	511	ua(:,:,:) = ub(:,:,:) / rdt
	512	va(:,:,:) = vb(:,:,:) / rdt
	513
[359]	514	! calls dyn_spg. we assume euler time step, starting from rest.
[3]	515	indic = 0
[359]	516	CALL dyn_spg( nit000, indic ) ! surface pressure gradient
[3]	517
	518	! the new velocity is ua*rdt
	519
	520	CALL lbc_lnk( ua, 'U', -1. )
	521	CALL lbc_lnk( va, 'V', -1. )
	522
	523	ub(:,:,:) = ua(:,:,:) * rdt
	524	vb(:,:,:) = va(:,:,:) * rdt
	525	ua(:,:,:) = 0.e0
	526	va(:,:,:) = 0.e0
	527	un(:,:,:) = ub(:,:,:)
	528	vn(:,:,:) = vb(:,:,:)
	529
	530	! Compute the divergence and curl
	531
	532	CALL div_cur( nit000 ) ! now horizontal divergence and curl
	533
	534	hdivb(:,:,:) = hdivn(:,:,:) ! set the before to the now value
	535	rotb (:,:,:) = rotn (:,:,:) ! set the before to the now value
[508]	536	!
[3294]	537	CALL wrk_dealloc( jpi, jpj, jpk, zprn)
[2715]	538	!
[3]	539	END SUBROUTINE istate_uvg
	540
	541	!!=====================================================================
	542	END MODULE istate

Note: See TracBrowser for help on using the repository browser.

Download in other formats: