[458] | 1 | MODULE trazdf |
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| 2 | !!============================================================================== |
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| 3 | !! *** MODULE trazdf *** |
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| 4 | !! Ocean active tracers: vertical component of the tracer mixing trend |
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| 5 | !!============================================================================== |
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[2528] | 6 | !! History : 1.0 ! 2005-11 (G. Madec) Original code |
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| 7 | !! 3.0 ! 2008-01 (C. Ethe, G. Madec) merge TRC-TRA |
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[458] | 8 | !!---------------------------------------------------------------------- |
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[503] | 9 | |
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| 10 | !!---------------------------------------------------------------------- |
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[458] | 11 | !! tra_zdf : Update the tracer trend with the vertical diffusion |
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[2528] | 12 | !! tra_zdf_init : initialisation of the computation |
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[458] | 13 | !!---------------------------------------------------------------------- |
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| 14 | USE oce ! ocean dynamics and tracers variables |
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| 15 | USE dom_oce ! ocean space and time domain variables |
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[2715] | 16 | USE domvvl ! variable volume |
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| 17 | USE phycst ! physical constant |
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[458] | 18 | USE zdf_oce ! ocean vertical physics variables |
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[888] | 19 | USE sbc_oce ! surface boundary condition: ocean |
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[5836] | 20 | ! |
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| 21 | USE ldftra ! lateral diffusion: eddy diffusivity |
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| 22 | USE ldfslp ! lateral diffusion: iso-neutral slope |
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[458] | 23 | USE trazdf_exp ! vertical diffusion: explicit (tra_zdf_exp routine) |
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| 24 | USE trazdf_imp ! vertical diffusion: implicit (tra_zdf_imp routine) |
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[5836] | 25 | ! |
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[4990] | 26 | USE trd_oce ! trends: ocean variables |
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| 27 | USE trdtra ! trends manager: tracers |
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| 28 | ! |
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[458] | 29 | USE in_out_manager ! I/O manager |
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| 30 | USE prtctl ! Print control |
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[592] | 31 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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[2715] | 32 | USE lib_mpp ! MPP library |
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[3294] | 33 | USE wrk_nemo ! Memory allocation |
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| 34 | USE timing ! Timing |
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[592] | 35 | |
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[458] | 36 | IMPLICIT NONE |
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| 37 | PRIVATE |
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| 38 | |
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[2715] | 39 | PUBLIC tra_zdf ! routine called by step.F90 |
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| 40 | PUBLIC tra_zdf_init ! routine called by nemogcm.F90 |
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[458] | 41 | |
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[2715] | 42 | INTEGER :: nzdf = 0 ! type vertical diffusion algorithm used (defined from ln_zdf... namlist logicals) |
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[458] | 43 | |
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| 44 | !! * Substitutions |
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| 45 | # include "domzgr_substitute.h90" |
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| 46 | # include "zdfddm_substitute.h90" |
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| 47 | # include "vectopt_loop_substitute.h90" |
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| 48 | !!---------------------------------------------------------------------- |
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[5836] | 49 | !! NEMO/OPA 3.7 , NEMO Consortium (2015) |
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[888] | 50 | !! $Id$ |
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[2715] | 51 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[458] | 52 | !!---------------------------------------------------------------------- |
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[2715] | 53 | CONTAINS |
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[458] | 54 | |
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| 55 | SUBROUTINE tra_zdf( kt ) |
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| 56 | !!---------------------------------------------------------------------- |
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| 57 | !! *** ROUTINE tra_zdf *** |
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| 58 | !! |
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| 59 | !! ** Purpose : compute the vertical ocean tracer physics. |
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| 60 | !!--------------------------------------------------------------------- |
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| 61 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
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[2528] | 62 | !! |
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[458] | 63 | INTEGER :: jk ! Dummy loop indices |
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[3294] | 64 | REAL(wp), POINTER, DIMENSION(:,:,:) :: ztrdt, ztrds ! 3D workspace |
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[458] | 65 | !!--------------------------------------------------------------------- |
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[3294] | 66 | ! |
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| 67 | IF( nn_timing == 1 ) CALL timing_start('tra_zdf') |
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| 68 | ! |
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[458] | 69 | IF( neuler == 0 .AND. kt == nit000 ) THEN ! at nit000 |
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[2715] | 70 | r2dtra(:) = rdttra(:) ! = rdtra (restarting with Euler time stepping) |
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[458] | 71 | ELSEIF( kt <= nit000 + 1) THEN ! at nit000 or nit000+1 |
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[2715] | 72 | r2dtra(:) = 2. * rdttra(:) ! = 2 rdttra (leapfrog) |
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[458] | 73 | ENDIF |
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| 74 | |
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[2528] | 75 | IF( l_trdtra ) THEN !* Save ta and sa trends |
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[3294] | 76 | CALL wrk_alloc( jpi, jpj, jpk, ztrdt, ztrds ) |
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| 77 | ztrdt(:,:,:) = tsa(:,:,:,jp_tem) |
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| 78 | ztrds(:,:,:) = tsa(:,:,:,jp_sal) |
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[458] | 79 | ENDIF |
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| 80 | |
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| 81 | SELECT CASE ( nzdf ) ! compute lateral mixing trend and add it to the general trend |
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[3294] | 82 | CASE ( 0 ) ; CALL tra_zdf_exp( kt, nit000, 'TRA', r2dtra, nn_zdfexp, tsb, tsa, jpts ) ! explicit scheme |
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| 83 | CASE ( 1 ) ; CALL tra_zdf_imp( kt, nit000, 'TRA', r2dtra, tsb, tsa, jpts ) ! implicit scheme |
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[458] | 84 | END SELECT |
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[5836] | 85 | !!gm WHY here ! and I don't like that ! |
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[5385] | 86 | ! DRAKKAR SSS control { |
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| 87 | ! JMM avoid negative salinities near river outlet ! Ugly fix |
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| 88 | ! JMM : restore negative salinities to small salinities: |
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| 89 | WHERE ( tsa(:,:,:,jp_sal) < 0._wp ) tsa(:,:,:,jp_sal) = 0.1_wp |
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[5836] | 90 | !!gm |
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[458] | 91 | |
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[1110] | 92 | IF( l_trdtra ) THEN ! save the vertical diffusive trends for further diagnostics |
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| 93 | DO jk = 1, jpkm1 |
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[2715] | 94 | ztrdt(:,:,jk) = ( ( tsa(:,:,jk,jp_tem) - tsb(:,:,jk,jp_tem) ) / r2dtra(jk) ) - ztrdt(:,:,jk) |
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| 95 | ztrds(:,:,jk) = ( ( tsa(:,:,jk,jp_sal) - tsb(:,:,jk,jp_sal) ) / r2dtra(jk) ) - ztrds(:,:,jk) |
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[1110] | 96 | END DO |
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[5836] | 97 | !!gm this should be moved in trdtra.F90 and done on all trends |
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[4990] | 98 | CALL lbc_lnk( ztrdt, 'T', 1. ) |
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| 99 | CALL lbc_lnk( ztrds, 'T', 1. ) |
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[5836] | 100 | !!gm |
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[4990] | 101 | CALL trd_tra( kt, 'TRA', jp_tem, jptra_zdf, ztrdt ) |
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| 102 | CALL trd_tra( kt, 'TRA', jp_sal, jptra_zdf, ztrds ) |
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[3294] | 103 | CALL wrk_dealloc( jpi, jpj, jpk, ztrdt, ztrds ) |
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[1110] | 104 | ENDIF |
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| 105 | |
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| 106 | ! ! print mean trends (used for debugging) |
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[2528] | 107 | IF(ln_ctl) CALL prt_ctl( tab3d_1=tsa(:,:,:,jp_tem), clinfo1=' zdf - Ta: ', mask1=tmask, & |
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| 108 | & tab3d_2=tsa(:,:,:,jp_sal), clinfo2= ' Sa: ', mask2=tmask, clinfo3='tra' ) |
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[2715] | 109 | ! |
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[3294] | 110 | IF( nn_timing == 1 ) CALL timing_stop('tra_zdf') |
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| 111 | ! |
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[458] | 112 | END SUBROUTINE tra_zdf |
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| 113 | |
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| 114 | |
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[2528] | 115 | SUBROUTINE tra_zdf_init |
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[458] | 116 | !!---------------------------------------------------------------------- |
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[2528] | 117 | !! *** ROUTINE tra_zdf_init *** |
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[458] | 118 | !! |
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| 119 | !! ** Purpose : Choose the vertical mixing scheme |
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| 120 | !! |
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[789] | 121 | !! ** Method : Set nzdf from ln_zdfexp |
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[458] | 122 | !! nzdf = 0 explicit (time-splitting) scheme (ln_zdfexp=T) |
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| 123 | !! = 1 implicit (euler backward) scheme (ln_zdfexp=F) |
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[5836] | 124 | !! NB: rotation of lateral mixing operator or TKE & GLS schemes, |
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| 125 | !! an implicit scheme is required. |
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[458] | 126 | !!---------------------------------------------------------------------- |
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| 127 | USE zdftke |
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[2528] | 128 | USE zdfgls |
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[458] | 129 | !!---------------------------------------------------------------------- |
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| 130 | |
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| 131 | ! Choice from ln_zdfexp already read in namelist in zdfini module |
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[2528] | 132 | IF( ln_zdfexp ) THEN ; nzdf = 0 ! use explicit scheme |
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| 133 | ELSE ; nzdf = 1 ! use implicit scheme |
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[458] | 134 | ENDIF |
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| 135 | |
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| 136 | ! Force implicit schemes |
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[5836] | 137 | IF( lk_zdftke .OR. lk_zdfgls ) nzdf = 1 ! TKE, or GLS physics |
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| 138 | IF( ln_traldf_iso ) nzdf = 1 ! iso-neutral lateral physics |
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| 139 | IF( ln_traldf_hor .AND. ln_sco ) nzdf = 1 ! horizontal lateral physics in s-coordinate |
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[2528] | 140 | IF( ln_zdfexp .AND. nzdf == 1 ) CALL ctl_stop( 'tra_zdf : If using the rotation of lateral mixing operator', & |
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[5836] | 141 | & ' GLS or TKE scheme, the implicit scheme is required, set ln_zdfexp = .false.' ) |
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[458] | 142 | |
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| 143 | IF(lwp) THEN |
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| 144 | WRITE(numout,*) |
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[2528] | 145 | WRITE(numout,*) 'tra_zdf_init : vertical tracer physics scheme' |
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[458] | 146 | WRITE(numout,*) '~~~~~~~~~~~' |
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| 147 | IF( nzdf == 0 ) WRITE(numout,*) ' Explicit time-splitting scheme' |
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| 148 | IF( nzdf == 1 ) WRITE(numout,*) ' Implicit (euler backward) scheme' |
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| 149 | ENDIF |
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[2528] | 150 | ! |
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| 151 | END SUBROUTINE tra_zdf_init |
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[458] | 152 | |
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| 153 | !!============================================================================== |
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| 154 | END MODULE trazdf |
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