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istate.F90 in NEMO/branches/2019/dev_r11842_SI3-10_EAP/src/OCE/DOM – NEMO

source: NEMO/branches/2019/dev_r11842_SI3-10_EAP/src/OCE/DOM/istate.F90 @ 13662

Last change on this file since 13662 was 13662, checked in by clem, 3 years ago

update to almost r4.0.4

  • Property svn:keywords set to Id
File size: 8.2 KB
Line 
1MODULE istate
2   !!======================================================================
3   !!                     ***  MODULE  istate  ***
4   !! Ocean state   :  initial state setting
5   !!=====================================================================
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
15   !!            3.4  !  2011-04  (G. Madec) Merge of dtatem and dtasal & suppression of tb,tn/sb,sn
16   !!            3.7  !  2016-04  (S. Flavoni) introduce user defined initial state
17   !!----------------------------------------------------------------------
18
19   !!----------------------------------------------------------------------
20   !!   istate_init   : initial state setting
21   !!   istate_uvg    : initial velocity in geostropic balance
22   !!----------------------------------------------------------------------
23   USE oce            ! ocean dynamics and active tracers
24   USE dom_oce        ! ocean space and time domain
25   USE daymod         ! calendar
26   USE dtatsd         ! data temperature and salinity   (dta_tsd routine)
27   USE dtauvd         ! data: U & V current             (dta_uvd routine)
28   USE domvvl          ! varying vertical mesh
29   USE iscplrst        ! ice sheet coupling
30   USE wet_dry         ! wetting and drying (needed for wad_istate)
31   USE usrdef_istate   ! User defined initial state
32   !
33   USE in_out_manager  ! I/O manager
34   USE iom             ! I/O library
35   USE lib_mpp         ! MPP library
36   USE restart         ! restart
37
38   IMPLICIT NONE
39   PRIVATE
40
41   PUBLIC   istate_init   ! routine called by step.F90
42
43   !! * Substitutions
44#  include "vectopt_loop_substitute.h90"
45   !!----------------------------------------------------------------------
46   !! NEMO/OCE 4.0 , NEMO Consortium (2018)
47   !! $Id$
48   !! Software governed by the CeCILL license (see ./LICENSE)
49   !!----------------------------------------------------------------------
50CONTAINS
51
52   SUBROUTINE istate_init
53      !!----------------------------------------------------------------------
54      !!                   ***  ROUTINE istate_init  ***
55      !!
56      !! ** Purpose :   Initialization of the dynamics and tracer fields.
57      !!----------------------------------------------------------------------
58      INTEGER ::   ji, jj, jk   ! dummy loop indices
59!!gm see comment further down
60      REAL(wp), ALLOCATABLE, DIMENSION(:,:,:,:) ::   zuvd    ! U & V data workspace
61!!gm end
62      !!----------------------------------------------------------------------
63      !
64      IF(lwp) WRITE(numout,*)
65      IF(lwp) WRITE(numout,*) 'istate_init : Initialization of the dynamics and tracers'
66      IF(lwp) WRITE(numout,*) '~~~~~~~~~~~'
67
68!!gm  Why not include in the first call of dta_tsd ? 
69!!gm  probably associated with the use of internal damping...
70                     CALL dta_tsd_init        ! Initialisation of T & S input data
71!!gm to be moved in usrdef of C1D case
72!      IF( lk_c1d )   CALL dta_uvd_init        ! Initialization of U & V input data
73!!gm
74
75      rhd  (:,:,:  ) = 0._wp   ;   rhop (:,:,:  ) = 0._wp      ! set one for all to 0 at level jpk
76      rn2b (:,:,:  ) = 0._wp   ;   rn2  (:,:,:  ) = 0._wp      ! set one for all to 0 at levels 1 and jpk
77      tsa  (:,:,:,:) = 0._wp                                   ! set one for all to 0 at level jpk
78      rab_b(:,:,:,:) = 0._wp   ;   rab_n(:,:,:,:) = 0._wp      ! set one for all to 0 at level jpk
79#if defined key_agrif
80      ua   (:,:,:  ) = 0._wp   ! used in agrif_oce_sponge at initialization
81      va   (:,:,:  ) = 0._wp   ! used in agrif_oce_sponge at initialization   
82#endif
83
84      IF( ln_rstart ) THEN                    ! Restart from a file
85         !                                    ! -------------------
86         CALL rst_read                        ! Read the restart file
87         IF (ln_iscpl)       CALL iscpl_stp   ! extrapolate restart to wet and dry
88         CALL day_init                        ! model calendar (using both namelist and restart infos)
89         !
90      ELSE                                    ! Start from rest
91         !                                    ! ---------------
92         numror = 0                           ! define numror = 0 -> no restart file to read
93         neuler = 0                           ! Set time-step indicator at nit000 (euler forward)
94         CALL day_init                        ! model calendar (using both namelist and restart infos)
95         !                                    ! Initialization of ocean to zero
96         !
97         IF( ln_tsd_init ) THEN               
98            CALL dta_tsd( nit000, tsb )       ! read 3D T and S data at nit000
99            !
100            sshb(:,:)   = 0._wp               ! set the ocean at rest
101            IF( ll_wd ) THEN
102               sshb(:,:) =  -ssh_ref  ! Added in 30 here for bathy that adds 30 as Iterative test CEOD
103               !
104               ! Apply minimum wetdepth criterion
105               !
106               DO jj = 1,jpj
107                  DO ji = 1,jpi
108                     IF( ht_0(ji,jj) + sshb(ji,jj)  < rn_wdmin1 ) THEN
109                        sshb(ji,jj) = tmask(ji,jj,1)*( rn_wdmin1 - (ht_0(ji,jj)) )
110                     ENDIF
111                  END DO
112               END DO
113            ENDIF
114            ub  (:,:,:) = 0._wp
115            vb  (:,:,:) = 0._wp 
116            !
117         ELSE                                 ! user defined initial T and S
118            CALL usr_def_istate( gdept_b, tmask, tsb, ub, vb, sshb  )         
119         ENDIF
120         tsn  (:,:,:,:) = tsb (:,:,:,:)       ! set now values from to before ones
121         sshn (:,:)     = sshb(:,:)   
122         un   (:,:,:)   = ub  (:,:,:)
123         vn   (:,:,:)   = vb  (:,:,:)
124
125!!gm POTENTIAL BUG :
126!!gm  ISSUE :  if sshb /= 0  then, in non linear free surface, the e3._n, e3._b should be recomputed
127!!             as well as gdept and gdepw....   !!!!!
128!!      ===>>>>   probably a call to domvvl initialisation here....
129
130
131         !
132!!gm to be moved in usrdef of C1D case
133!         IF ( ln_uvd_init .AND. lk_c1d ) THEN ! read 3D U and V data at nit000
134!            ALLOCATE( zuvd(jpi,jpj,jpk,2) )
135!            CALL dta_uvd( nit000, zuvd )
136!            ub(:,:,:) = zuvd(:,:,:,1) ;  un(:,:,:) = ub(:,:,:)
137!            vb(:,:,:) = zuvd(:,:,:,2) ;  vn(:,:,:) = vb(:,:,:)
138!            DEALLOCATE( zuvd )
139!         ENDIF
140         !
141!!gm This is to be changed !!!!
142!         ! - ML - sshn could be modified by istate_eel, so that initialization of e3t_b is done here
143!         IF( .NOT.ln_linssh ) THEN
144!            DO jk = 1, jpk
145!               e3t_b(:,:,jk) = e3t_n(:,:,jk)
146!            END DO
147!         ENDIF
148!!gm
149         !
150      ENDIF 
151      !
152      ! Initialize "now" and "before" barotropic velocities:
153      ! Do it whatever the free surface method, these arrays being eventually used
154      !
155      un_b(:,:) = 0._wp   ;   vn_b(:,:) = 0._wp
156      ub_b(:,:) = 0._wp   ;   vb_b(:,:) = 0._wp
157      !
158!!gm  the use of umsak & vmask is not necessary below as un, vn, ub, vb are always masked
159      DO jk = 1, jpkm1
160         DO jj = 1, jpj
161            DO ji = 1, jpi
162               un_b(ji,jj) = un_b(ji,jj) + e3u_n(ji,jj,jk) * un(ji,jj,jk) * umask(ji,jj,jk)
163               vn_b(ji,jj) = vn_b(ji,jj) + e3v_n(ji,jj,jk) * vn(ji,jj,jk) * vmask(ji,jj,jk)
164               !
165               ub_b(ji,jj) = ub_b(ji,jj) + e3u_b(ji,jj,jk) * ub(ji,jj,jk) * umask(ji,jj,jk)
166               vb_b(ji,jj) = vb_b(ji,jj) + e3v_b(ji,jj,jk) * vb(ji,jj,jk) * vmask(ji,jj,jk)
167            END DO
168         END DO
169      END DO
170      !
171      un_b(:,:) = un_b(:,:) * r1_hu_n(:,:)
172      vn_b(:,:) = vn_b(:,:) * r1_hv_n(:,:)
173      !
174      ub_b(:,:) = ub_b(:,:) * r1_hu_b(:,:)
175      vb_b(:,:) = vb_b(:,:) * r1_hv_b(:,:)
176      !
177   END SUBROUTINE istate_init
178
179   !!======================================================================
180END MODULE istate
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