| 1 | MODULE istate |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE istate *** |
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| 4 | !! Ocean state : initial state setting |
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| 5 | !!===================================================================== |
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| 6 | !! History : OPA ! 1989-12 (P. Andrich) Original code |
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| 7 | !! 5.0 ! 1991-11 (G. Madec) rewritting |
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| 8 | !! 6.0 ! 1996-01 (G. Madec) terrain following coordinates |
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| 9 | !! 8.0 ! 2001-09 (M. Levy, M. Ben Jelloul) istate_eel |
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| 10 | !! 8.0 ! 2001-09 (M. Levy, M. Ben Jelloul) istate_uvg |
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| 11 | !! NEMO 1.0 ! 2003-08 (G. Madec, C. Talandier) F90: Free form, modules + EEL R5 |
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| 12 | !! - ! 2004-05 (A. Koch-Larrouy) istate_gyre |
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| 13 | !! 2.0 ! 2006-07 (S. Masson) distributed restart using iom |
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| 14 | !! 3.3 ! 2010-10 (C. Ethe) merge TRC-TRA |
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| 15 | !! 3.4 ! 2011-04 (G. Madec) Merge of dtatem and dtasal & suppression of tb,tn/sb,sn |
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| 16 | !! 3.7 ! 2016-04 (S. Flavoni) introduce user defined initial state |
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| 17 | !!---------------------------------------------------------------------- |
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| 18 | |
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| 19 | !!---------------------------------------------------------------------- |
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| 20 | !! istate_init : initial state setting |
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| 21 | !! istate_uvg : initial velocity in geostropic balance |
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| 22 | !!---------------------------------------------------------------------- |
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| 23 | USE oce ! ocean dynamics and active tracers |
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| 24 | USE dom_oce ! ocean space and time domain |
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| 25 | USE daymod ! calendar |
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| 26 | USE divhor ! horizontal divergence (div_hor routine) |
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| 27 | USE dtatsd ! data temperature and salinity (dta_tsd routine) |
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| 28 | USE dtauvd ! data: U & V current (dta_uvd routine) |
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| 29 | USE domvvl ! varying vertical mesh |
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| 30 | USE iscplrst ! ice sheet coupling |
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| 31 | USE wet_dry ! wetting and drying (needed for wad_istate) |
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| 32 | USE usrdef_istate ! User defined initial state |
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| 33 | ! |
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| 34 | USE in_out_manager ! I/O manager |
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| 35 | USE iom ! I/O library |
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| 36 | USE lib_mpp ! MPP library |
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| 37 | USE restart ! restart |
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| 38 | USE timing ! Timing |
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| 39 | |
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| 40 | IMPLICIT NONE |
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| 41 | PRIVATE |
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| 42 | |
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| 43 | PUBLIC istate_init ! routine called by step.F90 |
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| 44 | |
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| 45 | !! * Substitutions |
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| 46 | # include "vectopt_loop_substitute.h90" |
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| 47 | !!---------------------------------------------------------------------- |
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| 48 | !! NEMO/OPA 3.7 , NEMO Consortium (2014) |
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| 49 | !! $Id$ |
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| 50 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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| 51 | !!---------------------------------------------------------------------- |
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| 52 | CONTAINS |
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| 53 | |
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| 54 | SUBROUTINE istate_init |
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| 55 | !!---------------------------------------------------------------------- |
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| 56 | !! *** ROUTINE istate_init *** |
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| 57 | !! |
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| 58 | !! ** Purpose : Initialization of the dynamics and tracer fields. |
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| 59 | !!---------------------------------------------------------------------- |
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| 60 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 61 | !!gm see comment further down |
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| 62 | REAL(wp), ALLOCATABLE, DIMENSION(:,:,:,:) :: zuvd ! U & V data workspace |
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| 63 | !!gm end |
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| 64 | !!---------------------------------------------------------------------- |
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| 65 | ! |
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| 66 | IF( ln_timing ) CALL timing_start('istate_init') |
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| 67 | ! |
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| 68 | IF(lwp) WRITE(numout,*) |
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| 69 | IF(lwp) WRITE(numout,*) 'istate_init : Initialization of the dynamics and tracers' |
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| 70 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~' |
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| 71 | |
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| 72 | !!gm Why not include in the first call of dta_tsd ? |
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| 73 | !!gm probably associated with the use of internal damping... |
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| 74 | CALL dta_tsd_init ! Initialisation of T & S input data |
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| 75 | !!gm to be moved in usrdef of C1D case |
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| 76 | ! IF( lk_c1d ) CALL dta_uvd_init ! Initialization of U & V input data |
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| 77 | !!gm |
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| 78 | |
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| 79 | rhd (:,:,: ) = 0._wp ; rhop (:,:,: ) = 0._wp ! set one for all to 0 at level jpk |
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| 80 | rn2b (:,:,: ) = 0._wp ; rn2 (:,:,: ) = 0._wp ! set one for all to 0 at levels 1 and jpk |
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| 81 | tsa (:,:,:,:) = 0._wp ! set one for all to 0 at level jpk |
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| 82 | rab_b(:,:,:,:) = 0._wp ; rab_n(:,:,:,:) = 0._wp ! set one for all to 0 at level jpk |
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| 83 | |
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| 84 | IF( ln_rstart ) THEN ! Restart from a file |
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| 85 | ! ! ------------------- |
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| 86 | CALL rst_read ! Read the restart file |
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| 87 | IF (ln_iscpl) CALL iscpl_stp ! extrapolate restart to wet and dry |
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| 88 | CALL day_init ! model calendar (using both namelist and restart infos) |
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| 89 | ! |
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| 90 | ELSE ! Start from rest |
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| 91 | ! ! --------------- |
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| 92 | numror = 0 ! define numror = 0 -> no restart file to read |
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| 93 | neuler = 0 ! Set time-step indicator at nit000 (euler forward) |
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| 94 | CALL day_init ! model calendar (using both namelist and restart infos) |
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| 95 | ! ! Initialization of ocean to zero |
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| 96 | ! |
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| 97 | IF( ln_tsd_init ) THEN |
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| 98 | CALL dta_tsd( nit000, tsb ) ! read 3D T and S data at nit000 |
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| 99 | ! |
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| 100 | sshb(:,:) = 0._wp ! set the ocean at rest |
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| 101 | ub (:,:,:) = 0._wp |
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| 102 | vb (:,:,:) = 0._wp |
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| 103 | ! |
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| 104 | ELSE ! user defined initial T and S |
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| 105 | CALL usr_def_istate( gdept_b, tmask, tsb, ub, vb, sshb ) |
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| 106 | ENDIF |
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| 107 | tsn (:,:,:,:) = tsb (:,:,:,:) ! set now values from to before ones |
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| 108 | sshn (:,:) = sshb(:,:) |
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| 109 | un (:,:,:) = ub (:,:,:) |
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| 110 | vn (:,:,:) = vb (:,:,:) |
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| 111 | hdivn(:,:,jpk) = 0._wp ! bottom divergence set one for 0 to zero at jpk level |
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| 112 | CALL div_hor( 0 ) ! compute interior hdivn value |
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| 113 | !!gm hdivn(:,:,:) = 0._wp |
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| 114 | |
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| 115 | !!gm POTENTIAL BUG : |
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| 116 | !!gm ISSUE : if sshb /= 0 then, in non linear free surface, the e3._n, e3._b should be recomputed |
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| 117 | !! as well as gdept and gdepw.... !!!!! |
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| 118 | !! ===>>>> probably a call to domvvl initialisation here.... |
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| 119 | |
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| 120 | |
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| 121 | ! |
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| 122 | !!gm to be moved in usrdef of C1D case |
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| 123 | ! IF ( ln_uvd_init .AND. lk_c1d ) THEN ! read 3D U and V data at nit000 |
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| 124 | ! ALLOCATE( zuvd(jpi,jpj,jpk,2) ) |
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| 125 | ! CALL dta_uvd( nit000, zuvd ) |
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| 126 | ! ub(:,:,:) = zuvd(:,:,:,1) ; un(:,:,:) = ub(:,:,:) |
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| 127 | ! vb(:,:,:) = zuvd(:,:,:,2) ; vn(:,:,:) = vb(:,:,:) |
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| 128 | ! DEALLOCATE( zuvd ) |
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| 129 | ! ENDIF |
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| 130 | ! |
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| 131 | !!gm This is to be changed !!!! |
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| 132 | ! ! - ML - sshn could be modified by istate_eel, so that initialization of e3t_b is done here |
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| 133 | ! IF( .NOT.ln_linssh ) THEN |
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| 134 | ! DO jk = 1, jpk |
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| 135 | ! e3t_b(:,:,jk) = e3t_n(:,:,jk) |
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| 136 | ! END DO |
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| 137 | ! ENDIF |
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| 138 | !!gm |
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| 139 | ! |
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| 140 | ENDIF |
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| 141 | ! |
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| 142 | ! Initialize "now" and "before" barotropic velocities: |
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| 143 | ! Do it whatever the free surface method, these arrays being eventually used |
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| 144 | ! |
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| 145 | un_b(:,:) = 0._wp ; vn_b(:,:) = 0._wp |
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| 146 | ub_b(:,:) = 0._wp ; vb_b(:,:) = 0._wp |
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| 147 | ! |
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| 148 | !!gm the use of umsak & vmask is not necessary below as un, vn, ub, vb are always masked |
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| 149 | DO jk = 1, jpkm1 |
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| 150 | DO jj = 1, jpj |
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| 151 | DO ji = 1, jpi |
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| 152 | un_b(ji,jj) = un_b(ji,jj) + e3u_n(ji,jj,jk) * un(ji,jj,jk) * umask(ji,jj,jk) |
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| 153 | vn_b(ji,jj) = vn_b(ji,jj) + e3v_n(ji,jj,jk) * vn(ji,jj,jk) * vmask(ji,jj,jk) |
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| 154 | ! |
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| 155 | ub_b(ji,jj) = ub_b(ji,jj) + e3u_b(ji,jj,jk) * ub(ji,jj,jk) * umask(ji,jj,jk) |
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| 156 | vb_b(ji,jj) = vb_b(ji,jj) + e3v_b(ji,jj,jk) * vb(ji,jj,jk) * vmask(ji,jj,jk) |
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| 157 | END DO |
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| 158 | END DO |
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| 159 | END DO |
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| 160 | ! |
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| 161 | un_b(:,:) = un_b(:,:) * r1_hu_n(:,:) |
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| 162 | vn_b(:,:) = vn_b(:,:) * r1_hv_n(:,:) |
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| 163 | ! |
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| 164 | ub_b(:,:) = ub_b(:,:) * r1_hu_b(:,:) |
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| 165 | vb_b(:,:) = vb_b(:,:) * r1_hv_b(:,:) |
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| 166 | ! |
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| 167 | IF( ln_timing ) CALL timing_stop('istate_init') |
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| 168 | ! |
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| 169 | END SUBROUTINE istate_init |
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| 170 | |
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| 171 | !!====================================================================== |
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| 172 | END MODULE istate |
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