source: NEMO/branches/2020/dev_r12973_AGRIF_CMEMS/src/OCE/DOM/istate.F90 @ 13026

Last change on this file since 13026 was 13026, checked in by rblod, 17 months ago

AGRIF with northfold and perio, see ticket #2129

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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 divhor         ! horizontal divergence            (div_hor routine)
27   USE dtatsd         ! data temperature and salinity   (dta_tsd routine)
28   USE dtauvd         ! data: U & V current             (dta_uvd routine)
29   USE domvvl          ! varying vertical mesh
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#if defined key_agrif
38   USE agrif_oce_interp
39   USE agrif_oce
40#endif   
41
42   IMPLICIT NONE
43   PRIVATE
44
45   PUBLIC   istate_init   ! routine called by step.F90
46
47   !! * Substitutions
48#  include "do_loop_substitute.h90"
49   !!----------------------------------------------------------------------
50   !! NEMO/OCE 4.0 , NEMO Consortium (2018)
51   !! $Id$
52   !! Software governed by the CeCILL license (see ./LICENSE)
53   !!----------------------------------------------------------------------
54CONTAINS
55
56   SUBROUTINE istate_init( Kbb, Kmm, Kaa )
57      !!----------------------------------------------------------------------
58      !!                   ***  ROUTINE istate_init  ***
59      !!
60      !! ** Purpose :   Initialization of the dynamics and tracer fields.
61      !!----------------------------------------------------------------------
62      INTEGER, INTENT( in )  ::  Kbb, Kmm, Kaa   ! ocean time level indices
63      !
64      INTEGER ::   ji, jj, jk   ! dummy loop indices
65!!gm see comment further down
66      REAL(wp), ALLOCATABLE, DIMENSION(:,:,:,:) ::   zuvd    ! U & V data workspace
67!!gm end
68      !!----------------------------------------------------------------------
69      !
70      IF(lwp) WRITE(numout,*)
71      IF(lwp) WRITE(numout,*) 'istate_init : Initialization of the dynamics and tracers'
72      IF(lwp) WRITE(numout,*) '~~~~~~~~~~~'
73
74!!gm  Why not include in the first call of dta_tsd ? 
75!!gm  probably associated with the use of internal damping...
76       CALL dta_tsd_init        ! Initialisation of T & S input data
77!!gm to be moved in usrdef of C1D case
78!      IF( lk_c1d )   CALL dta_uvd_init        ! Initialization of U & V input data
79!!gm
80
81      rhd  (:,:,:  ) = 0._wp   ;   rhop (:,:,:  ) = 0._wp      ! set one for all to 0 at level jpk
82      rn2b (:,:,:  ) = 0._wp   ;   rn2  (:,:,:  ) = 0._wp      ! set one for all to 0 at levels 1 and jpk
83      ts  (:,:,:,:,Kaa) = 0._wp                                   ! set one for all to 0 at level jpk
84      rab_b(:,:,:,:) = 0._wp   ;   rab_n(:,:,:,:) = 0._wp      ! set one for all to 0 at level jpk
85#if defined key_agrif
86      uu   (:,:,:  ,Kaa) = 0._wp   ! used in agrif_oce_sponge at initialization
87      vv   (:,:,:  ,Kaa) = 0._wp   ! used in agrif_oce_sponge at initialization   
88#endif
89
90      IF( ln_rstart ) THEN                    ! Restart from a file
91         !                                    ! -------------------
92         CALL rst_read( Kbb, Kmm )            ! Read the restart file
93         CALL day_init                        ! model calendar (using both namelist and restart infos)
94         !
95      ELSE                                    ! Start from rest
96         !                                    ! ---------------
97         numror = 0                           ! define numror = 0 -> no restart file to read
98         l_1st_euler = .true.                 ! Set time-step indicator at nit000 (euler forward)
99         CALL day_init                        ! model calendar (using both namelist and restart infos)
100         !                                    ! Initialization of ocean to zero
101         !
102         IF( ln_tsd_init ) THEN               
103            IF( Agrif_root() ) THEN
104               CALL dta_tsd( nit000, ts(:,:,:,:,Kbb) )       ! read 3D T and S data at nit000
105               ssh(:,:,Kbb)   = 0._wp               ! set the ocean at rest
106               uu  (:,:,:,Kbb) = 0._wp
107               vv  (:,:,:,Kbb) = 0._wp 
108#if defined key_agrif
109            ELSE
110               CALL agrif_istate( Kbb, Kmm, Kaa ) 
111#endif
112            ENDIF
113            !
114            IF( ll_wd ) THEN
115               ssh(:,:,Kbb) =  -ssh_ref  ! Added in 30 here for bathy that adds 30 as Iterative test CEOD
116               !
117               ! Apply minimum wetdepth criterion
118               !
119               DO_2D_11_11
120                  IF( ht_0(ji,jj) + ssh(ji,jj,Kbb)  < rn_wdmin1 ) THEN
121                     ssh(ji,jj,Kbb) = tmask(ji,jj,1)*( rn_wdmin1 - (ht_0(ji,jj)) )
122                  ENDIF
123               END_2D
124            ENDIF 
125             !
126         ELSE                                 ! user defined initial T and S
127            CALL usr_def_istate( gdept(:,:,:,Kbb), tmask, ts(:,:,:,:,Kbb), uu(:,:,:,Kbb), vv(:,:,:,Kbb), ssh(:,:,Kbb)  )         
128         ENDIF
129         ts  (:,:,:,:,Kmm) = ts (:,:,:,:,Kbb)       ! set now values from to before ones
130         ssh (:,:,Kmm)     = ssh(:,:,Kbb)   
131         uu   (:,:,:,Kmm)   = uu  (:,:,:,Kbb)
132         vv   (:,:,:,Kmm)   = vv  (:,:,:,Kbb)
133         hdiv(:,:,jpk) = 0._wp               ! bottom divergence set one for 0 to zero at jpk level
134         CALL div_hor( 0, Kbb, Kmm )         ! compute interior hdiv value 
135!!gm                                    hdiv(:,:,:) = 0._wp
136
137!!gm POTENTIAL BUG :
138!!gm  ISSUE :  if ssh(:,:,Kbb) /= 0  then, in non linear free surface, the e3._n, e3._b should be recomputed
139!!             as well as gdept and gdepw....   !!!!!
140!!      ===>>>>   probably a call to domvvl initialisation here....
141
142
143         !
144!!gm to be moved in usrdef of C1D case
145!         IF ( ln_uvd_init .AND. lk_c1d ) THEN ! read 3D U and V data at nit000
146!            ALLOCATE( zuvd(jpi,jpj,jpk,2) )
147!            CALL dta_uvd( nit000, zuvd )
148!            uu(:,:,:,Kbb) = zuvd(:,:,:,1) ;  uu(:,:,:,Kmm) = uu(:,:,:,Kbb)
149!            vv(:,:,:,Kbb) = zuvd(:,:,:,2) ;  vv(:,:,:,Kmm) = vv(:,:,:,Kbb)
150!            DEALLOCATE( zuvd )
151!         ENDIF
152         !
153!!gm This is to be changed !!!!
154!         ! - ML - ssh(:,:,Kmm) could be modified by istate_eel, so that initialization of e3t(:,:,:,Kbb) is done here
155!         IF( .NOT.ln_linssh ) THEN
156!            DO jk = 1, jpk
157!               e3t(:,:,jk,Kbb) = e3t(:,:,jk,Kmm)
158!            END DO
159!         ENDIF
160!!gm
161         !
162      ENDIF 
163      !
164      ! Initialize "now" and "before" barotropic velocities:
165      ! Do it whatever the free surface method, these arrays being eventually used
166      !
167      uu_b(:,:,Kmm) = 0._wp   ;   vv_b(:,:,Kmm) = 0._wp
168      uu_b(:,:,Kbb) = 0._wp   ;   vv_b(:,:,Kbb) = 0._wp
169      !
170!!gm  the use of umsak & vmask is not necessary below as uu(:,:,:,Kmm), vv(:,:,:,Kmm), uu(:,:,:,Kbb), vv(:,:,:,Kbb) are always masked
171      DO_3D_11_11( 1, jpkm1 )
172         uu_b(ji,jj,Kmm) = uu_b(ji,jj,Kmm) + e3u(ji,jj,jk,Kmm) * uu(ji,jj,jk,Kmm) * umask(ji,jj,jk)
173         vv_b(ji,jj,Kmm) = vv_b(ji,jj,Kmm) + e3v(ji,jj,jk,Kmm) * vv(ji,jj,jk,Kmm) * vmask(ji,jj,jk)
174         !
175         uu_b(ji,jj,Kbb) = uu_b(ji,jj,Kbb) + e3u(ji,jj,jk,Kbb) * uu(ji,jj,jk,Kbb) * umask(ji,jj,jk)
176         vv_b(ji,jj,Kbb) = vv_b(ji,jj,Kbb) + e3v(ji,jj,jk,Kbb) * vv(ji,jj,jk,Kbb) * vmask(ji,jj,jk)
177      END_3D
178      !
179      uu_b(:,:,Kmm) = uu_b(:,:,Kmm) * r1_hu(:,:,Kmm)
180      vv_b(:,:,Kmm) = vv_b(:,:,Kmm) * r1_hv(:,:,Kmm)
181      !
182      uu_b(:,:,Kbb) = uu_b(:,:,Kbb) * r1_hu(:,:,Kbb)
183      vv_b(:,:,Kbb) = vv_b(:,:,Kbb) * r1_hv(:,:,Kbb)
184      !
185   END SUBROUTINE istate_init
186
187   !!======================================================================
188END MODULE istate
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