[3] | 1 | MODULE tranxt |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE tranxt *** |
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| 4 | !! Ocean active tracers: time stepping on temperature and salinity |
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| 5 | !!====================================================================== |
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[1110] | 6 | !! History : OPA ! 1991-11 (G. Madec) Original code |
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| 7 | !! 7.0 ! 1993-03 (M. Guyon) symetrical conditions |
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| 8 | !! 8.0 ! 1996-02 (G. Madec & M. Imbard) opa release 8.0 |
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| 9 | !! - ! 1996-04 (A. Weaver) Euler forward step |
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| 10 | !! 8.2 ! 1999-02 (G. Madec, N. Grima) semi-implicit pressure grad. |
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| 11 | !! NEMO 1.0 ! 2002-08 (G. Madec) F90: Free form and module |
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| 12 | !! - ! 2002-11 (C. Talandier, A-M Treguier) Open boundaries |
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| 13 | !! - ! 2005-04 (C. Deltel) Add Asselin trend in the ML budget |
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| 14 | !! 2.0 ! 2006-02 (L. Debreu, C. Mazauric) Agrif implementation |
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| 15 | !! 3.0 ! 2008-06 (G. Madec) time stepping always done in trazdf |
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[1438] | 16 | !! 3.1 ! 2009-02 (G. Madec, R. Benshila) re-introduce the vvl option |
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[2528] | 17 | !! 3.3 ! 2010-04 (M. Leclair, G. Madec) semi-implicit hpg with asselin filter + modified LF-RA |
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| 18 | !! - ! 2010-05 (C. Ethe, G. Madec) merge TRC-TRA |
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[3] | 19 | !!---------------------------------------------------------------------- |
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[503] | 20 | |
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| 21 | !!---------------------------------------------------------------------- |
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[2528] | 22 | !! tra_nxt : time stepping on tracers |
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| 23 | !! tra_nxt_fix : time stepping on tracers : fixed volume case |
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| 24 | !! tra_nxt_vvl : time stepping on tracers : variable volume case |
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[3] | 25 | !!---------------------------------------------------------------------- |
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| 26 | USE oce ! ocean dynamics and tracers variables |
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| 27 | USE dom_oce ! ocean space and time domain variables |
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[2528] | 28 | USE sbc_oce ! surface boundary condition: ocean |
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[3] | 29 | USE zdf_oce ! ??? |
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[1438] | 30 | USE domvvl ! variable volume |
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[1601] | 31 | USE dynspg_oce ! surface pressure gradient variables |
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| 32 | USE dynhpg ! hydrostatic pressure gradient |
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[2528] | 33 | USE trdmod_oce ! ocean space and time domain variables |
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| 34 | USE trdtra ! ocean active tracers trends |
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[888] | 35 | USE phycst |
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[2528] | 36 | USE obc_oce |
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[888] | 37 | USE obctra ! open boundary condition (obc_tra routine) |
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[3294] | 38 | USE bdy_oce |
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| 39 | USE bdytra ! open boundary condition (bdy_tra routine) |
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[3] | 40 | USE in_out_manager ! I/O manager |
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| 41 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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[258] | 42 | USE prtctl ! Print control |
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[2528] | 43 | USE traqsr ! penetrative solar radiation (needed for nksr) |
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| 44 | #if defined key_agrif |
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[389] | 45 | USE agrif_opa_update |
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| 46 | USE agrif_opa_interp |
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[2528] | 47 | #endif |
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[3294] | 48 | USE wrk_nemo ! Memory allocation |
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| 49 | USE timing ! Timing |
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[3] | 50 | |
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| 51 | IMPLICIT NONE |
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| 52 | PRIVATE |
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| 53 | |
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[2528] | 54 | PUBLIC tra_nxt ! routine called by step.F90 |
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| 55 | PUBLIC tra_nxt_fix ! to be used in trcnxt |
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| 56 | PUBLIC tra_nxt_vvl ! to be used in trcnxt |
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[592] | 57 | |
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[2715] | 58 | REAL(wp) :: rbcp ! Brown & Campana parameters for semi-implicit hpg |
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[1438] | 59 | |
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[592] | 60 | !! * Substitutions |
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| 61 | # include "domzgr_substitute.h90" |
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[3] | 62 | !!---------------------------------------------------------------------- |
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[2528] | 63 | !! NEMO/OPA 3.3 , NEMO-Consortium (2010) |
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[2715] | 64 | !! $Id$ |
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| 65 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[3] | 66 | !!---------------------------------------------------------------------- |
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| 67 | CONTAINS |
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| 68 | |
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| 69 | SUBROUTINE tra_nxt( kt ) |
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| 70 | !!---------------------------------------------------------------------- |
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| 71 | !! *** ROUTINE tranxt *** |
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| 72 | !! |
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[1110] | 73 | !! ** Purpose : Apply the boundary condition on the after temperature |
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| 74 | !! and salinity fields, achieved the time stepping by adding |
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| 75 | !! the Asselin filter on now fields and swapping the fields. |
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[3] | 76 | !! |
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[1110] | 77 | !! ** Method : At this stage of the computation, ta and sa are the |
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| 78 | !! after temperature and salinity as the time stepping has |
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| 79 | !! been performed in trazdf_imp or trazdf_exp module. |
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[3] | 80 | !! |
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[1110] | 81 | !! - Apply lateral boundary conditions on (ta,sa) |
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| 82 | !! at the local domain boundaries through lbc_lnk call, |
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[3294] | 83 | !! at the one-way open boundaries (lk_obc=T), |
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[1110] | 84 | !! at the AGRIF zoom boundaries (lk_agrif=T) |
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| 85 | !! |
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[1438] | 86 | !! - Update lateral boundary conditions on AGRIF children |
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| 87 | !! domains (lk_agrif=T) |
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[1110] | 88 | !! |
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| 89 | !! ** Action : - (tb,sb) and (tn,sn) ready for the next time step |
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| 90 | !! - (ta,sa) time averaged (t,s) (ln_dynhpg_imp = T) |
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[503] | 91 | !!---------------------------------------------------------------------- |
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| 92 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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| 93 | !! |
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[2528] | 94 | INTEGER :: jk, jn ! dummy loop indices |
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| 95 | REAL(wp) :: zfact ! local scalars |
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[3294] | 96 | REAL(wp), POINTER, DIMENSION(:,:,:) :: ztrdt, ztrds |
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[3] | 97 | !!---------------------------------------------------------------------- |
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[3294] | 98 | ! |
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| 99 | IF( nn_timing == 1 ) CALL timing_start( 'tra_nxt') |
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| 100 | ! |
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[1110] | 101 | IF( kt == nit000 ) THEN |
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| 102 | IF(lwp) WRITE(numout,*) |
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| 103 | IF(lwp) WRITE(numout,*) 'tra_nxt : achieve the time stepping by Asselin filter and array swap' |
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| 104 | IF(lwp) WRITE(numout,*) '~~~~~~~' |
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[2528] | 105 | ! |
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[2715] | 106 | rbcp = 0.25 * (1. + atfp) * (1. + atfp) * ( 1. - atfp) ! Brown & Campana parameter for semi-implicit hpg |
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[592] | 107 | ENDIF |
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| 108 | |
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[1110] | 109 | ! Update after tracer on domain lateral boundaries |
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| 110 | ! |
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[2528] | 111 | CALL lbc_lnk( tsa(:,:,:,jp_tem), 'T', 1. ) ! local domain boundaries (T-point, unchanged sign) |
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| 112 | CALL lbc_lnk( tsa(:,:,:,jp_sal), 'T', 1. ) |
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[1110] | 113 | ! |
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[2528] | 114 | #if defined key_obc |
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[1876] | 115 | IF( lk_obc ) CALL obc_tra( kt ) ! OBC open boundaries |
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[3] | 116 | #endif |
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[2528] | 117 | #if defined key_bdy |
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[3294] | 118 | IF( lk_bdy ) CALL bdy_tra( kt ) ! BDY open boundaries |
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[1110] | 119 | #endif |
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[392] | 120 | #if defined key_agrif |
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[2528] | 121 | CALL Agrif_tra ! AGRIF zoom boundaries |
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[389] | 122 | #endif |
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[1438] | 123 | |
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| 124 | ! set time step size (Euler/Leapfrog) |
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[2715] | 125 | IF( neuler == 0 .AND. kt == nit000 ) THEN ; r2dtra(:) = rdttra(:) ! at nit000 (Euler) |
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| 126 | ELSEIF( kt <= nit000 + 1 ) THEN ; r2dtra(:) = 2.* rdttra(:) ! at nit000 or nit000+1 (Leapfrog) |
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[1438] | 127 | ENDIF |
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[3] | 128 | |
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[1110] | 129 | ! trends computation initialisation |
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[2528] | 130 | IF( l_trdtra ) THEN ! store now fields before applying the Asselin filter |
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[3294] | 131 | CALL wrk_alloc( jpi, jpj, jpk, ztrdt, ztrds ) |
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| 132 | ztrdt(:,:,:) = tsn(:,:,:,jp_tem) |
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| 133 | ztrds(:,:,:) = tsn(:,:,:,jp_sal) |
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[1110] | 134 | ENDIF |
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| 135 | |
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[2528] | 136 | IF( neuler == 0 .AND. kt == nit000 ) THEN ! Euler time-stepping at first time-step (only swap) |
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| 137 | DO jn = 1, jpts |
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| 138 | DO jk = 1, jpkm1 |
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| 139 | tsn(:,:,jk,jn) = tsa(:,:,jk,jn) |
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| 140 | END DO |
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| 141 | END DO |
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| 142 | ELSE ! Leap-Frog + Asselin filter time stepping |
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| 143 | ! |
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[3294] | 144 | IF( lk_vvl ) THEN ; CALL tra_nxt_vvl( kt, nit000, 'TRA', tsb, tsn, tsa, jpts ) ! variable volume level (vvl) |
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| 145 | ELSE ; CALL tra_nxt_fix( kt, nit000, 'TRA', tsb, tsn, tsa, jpts ) ! fixed volume level |
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[2528] | 146 | ENDIF |
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| 147 | ENDIF |
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[2715] | 148 | ! |
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[1438] | 149 | #if defined key_agrif |
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| 150 | ! Update tracer at AGRIF zoom boundaries |
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| 151 | IF( .NOT.Agrif_Root() ) CALL Agrif_Update_Tra( kt ) ! children only |
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| 152 | #endif |
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[2715] | 153 | ! |
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[1438] | 154 | ! trends computation |
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[2528] | 155 | IF( l_trdtra ) THEN ! trend of the Asselin filter (tb filtered - tb)/dt |
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[1110] | 156 | DO jk = 1, jpkm1 |
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[2715] | 157 | zfact = 1.e0 / r2dtra(jk) |
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[2528] | 158 | ztrdt(:,:,jk) = ( tsb(:,:,jk,jp_tem) - ztrdt(:,:,jk) ) * zfact |
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| 159 | ztrds(:,:,jk) = ( tsb(:,:,jk,jp_sal) - ztrds(:,:,jk) ) * zfact |
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[1110] | 160 | END DO |
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[2528] | 161 | CALL trd_tra( kt, 'TRA', jp_tem, jptra_trd_atf, ztrdt ) |
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| 162 | CALL trd_tra( kt, 'TRA', jp_sal, jptra_trd_atf, ztrds ) |
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[3294] | 163 | CALL wrk_dealloc( jpi, jpj, jpk, ztrdt, ztrds ) |
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[1438] | 164 | END IF |
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[2715] | 165 | ! |
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[1438] | 166 | ! ! control print |
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[2528] | 167 | IF(ln_ctl) CALL prt_ctl( tab3d_1=tsn(:,:,:,jp_tem), clinfo1=' nxt - Tn: ', mask1=tmask, & |
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| 168 | & tab3d_2=tsn(:,:,:,jp_sal), clinfo2= ' Sn: ', mask2=tmask ) |
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[1438] | 169 | ! |
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[3294] | 170 | ! |
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| 171 | IF( nn_timing == 1 ) CALL timing_stop('tra_nxt') |
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| 172 | ! |
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[1438] | 173 | END SUBROUTINE tra_nxt |
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| 174 | |
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| 175 | |
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[3294] | 176 | SUBROUTINE tra_nxt_fix( kt, kit000, cdtype, ptb, ptn, pta, kjpt ) |
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[1438] | 177 | !!---------------------------------------------------------------------- |
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| 178 | !! *** ROUTINE tra_nxt_fix *** |
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| 179 | !! |
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| 180 | !! ** Purpose : fixed volume: apply the Asselin time filter and |
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| 181 | !! swap the tracer fields. |
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| 182 | !! |
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| 183 | !! ** Method : - Apply a Asselin time filter on now fields. |
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| 184 | !! - save in (ta,sa) an average over the three time levels |
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| 185 | !! which will be used to compute rdn and thus the semi-implicit |
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| 186 | !! hydrostatic pressure gradient (ln_dynhpg_imp = T) |
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| 187 | !! - swap tracer fields to prepare the next time_step. |
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| 188 | !! This can be summurized for tempearture as: |
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[2528] | 189 | !! ztm = tn + rbcp * [ta -2 tn + tb ] ln_dynhpg_imp = T |
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| 190 | !! ztm = 0 otherwise |
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| 191 | !! with rbcp=1/4 * (1-atfp^4) / (1-atfp) |
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[1438] | 192 | !! tb = tn + atfp*[ tb - 2 tn + ta ] |
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[2528] | 193 | !! tn = ta |
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[1438] | 194 | !! ta = ztm (NB: reset to 0 after eos_bn2 call) |
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| 195 | !! |
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| 196 | !! ** Action : - (tb,sb) and (tn,sn) ready for the next time step |
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| 197 | !! - (ta,sa) time averaged (t,s) (ln_dynhpg_imp = T) |
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| 198 | !!---------------------------------------------------------------------- |
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[2715] | 199 | INTEGER , INTENT(in ) :: kt ! ocean time-step index |
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[3294] | 200 | INTEGER , INTENT(in ) :: kit000 ! first time step index |
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[2715] | 201 | CHARACTER(len=3), INTENT(in ) :: cdtype ! =TRA or TRC (tracer indicator) |
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| 202 | INTEGER , INTENT(in ) :: kjpt ! number of tracers |
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| 203 | REAL(wp) , INTENT(inout), DIMENSION(jpi,jpj,jpk,kjpt) :: ptb ! before tracer fields |
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| 204 | REAL(wp) , INTENT(inout), DIMENSION(jpi,jpj,jpk,kjpt) :: ptn ! now tracer fields |
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| 205 | REAL(wp) , INTENT(inout), DIMENSION(jpi,jpj,jpk,kjpt) :: pta ! tracer trend |
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| 206 | ! |
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[2528] | 207 | INTEGER :: ji, jj, jk, jn ! dummy loop indices |
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| 208 | LOGICAL :: ll_tra_hpg ! local logical |
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| 209 | REAL(wp) :: ztn, ztd ! local scalars |
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[1438] | 210 | !!---------------------------------------------------------------------- |
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| 211 | |
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[3294] | 212 | IF( kt == kit000 ) THEN |
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[1438] | 213 | IF(lwp) WRITE(numout,*) |
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[3294] | 214 | IF(lwp) WRITE(numout,*) 'tra_nxt_fix : time stepping', cdtype |
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[1438] | 215 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~' |
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| 216 | ENDIF |
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| 217 | ! |
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[2528] | 218 | IF( cdtype == 'TRA' ) THEN ; ll_tra_hpg = ln_dynhpg_imp ! active tracers case and semi-implicit hpg |
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| 219 | ELSE ; ll_tra_hpg = .FALSE. ! passive tracers case or NO semi-implicit hpg |
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| 220 | ENDIF |
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| 221 | ! |
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| 222 | DO jn = 1, kjpt |
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[1438] | 223 | ! |
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[2528] | 224 | DO jk = 1, jpkm1 |
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| 225 | DO jj = 1, jpj |
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| 226 | DO ji = 1, jpi |
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| 227 | ztn = ptn(ji,jj,jk,jn) |
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| 228 | ztd = pta(ji,jj,jk,jn) - 2. * ztn + ptb(ji,jj,jk,jn) ! time laplacian on tracers |
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| 229 | ! |
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| 230 | ptb(ji,jj,jk,jn) = ztn + atfp * ztd ! ptb <-- filtered ptn |
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| 231 | ptn(ji,jj,jk,jn) = pta(ji,jj,jk,jn) ! ptn <-- pta |
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| 232 | ! |
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| 233 | IF( ll_tra_hpg ) pta(ji,jj,jk,jn) = ztn + rbcp * ztd ! pta <-- Brown & Campana average |
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[3] | 234 | END DO |
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[2528] | 235 | END DO |
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| 236 | END DO |
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[1110] | 237 | ! |
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[2528] | 238 | END DO |
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[1438] | 239 | ! |
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| 240 | END SUBROUTINE tra_nxt_fix |
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[3] | 241 | |
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[1110] | 242 | |
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[3294] | 243 | SUBROUTINE tra_nxt_vvl( kt, kit000, cdtype, ptb, ptn, pta, kjpt ) |
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[1438] | 244 | !!---------------------------------------------------------------------- |
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| 245 | !! *** ROUTINE tra_nxt_vvl *** |
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| 246 | !! |
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| 247 | !! ** Purpose : Time varying volume: apply the Asselin time filter |
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| 248 | !! and swap the tracer fields. |
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| 249 | !! |
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| 250 | !! ** Method : - Apply a thickness weighted Asselin time filter on now fields. |
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| 251 | !! - save in (ta,sa) a thickness weighted average over the three |
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| 252 | !! time levels which will be used to compute rdn and thus the semi- |
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| 253 | !! implicit hydrostatic pressure gradient (ln_dynhpg_imp = T) |
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| 254 | !! - swap tracer fields to prepare the next time_step. |
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| 255 | !! This can be summurized for tempearture as: |
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[2528] | 256 | !! ztm = ( e3t_n*tn + rbcp*[ e3t_b*tb - 2 e3t_n*tn + e3t_a*ta ] ) ln_dynhpg_imp = T |
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| 257 | !! /( e3t_n + rbcp*[ e3t_b - 2 e3t_n + e3t_a ] ) |
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| 258 | !! ztm = 0 otherwise |
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[1438] | 259 | !! tb = ( e3t_n*tn + atfp*[ e3t_b*tb - 2 e3t_n*tn + e3t_a*ta ] ) |
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| 260 | !! /( e3t_n + atfp*[ e3t_b - 2 e3t_n + e3t_a ] ) |
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| 261 | !! tn = ta |
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| 262 | !! ta = zt (NB: reset to 0 after eos_bn2 call) |
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| 263 | !! |
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| 264 | !! ** Action : - (tb,sb) and (tn,sn) ready for the next time step |
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| 265 | !! - (ta,sa) time averaged (t,s) (ln_dynhpg_imp = T) |
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| 266 | !!---------------------------------------------------------------------- |
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[2715] | 267 | INTEGER , INTENT(in ) :: kt ! ocean time-step index |
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[3294] | 268 | INTEGER , INTENT(in ) :: kit000 ! first time step index |
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[2715] | 269 | CHARACTER(len=3), INTENT(in ) :: cdtype ! =TRA or TRC (tracer indicator) |
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| 270 | INTEGER , INTENT(in ) :: kjpt ! number of tracers |
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| 271 | REAL(wp) , INTENT(inout), DIMENSION(jpi,jpj,jpk,kjpt) :: ptb ! before tracer fields |
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| 272 | REAL(wp) , INTENT(inout), DIMENSION(jpi,jpj,jpk,kjpt) :: ptn ! now tracer fields |
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| 273 | REAL(wp) , INTENT(inout), DIMENSION(jpi,jpj,jpk,kjpt) :: pta ! tracer trend |
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[1438] | 274 | !! |
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[2528] | 275 | LOGICAL :: ll_tra, ll_tra_hpg, ll_traqsr ! local logical |
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| 276 | INTEGER :: ji, jj, jk, jn ! dummy loop indices |
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[2715] | 277 | REAL(wp) :: zfact1, ztc_a , ztc_n , ztc_b , ztc_f , ztc_d ! local scalar |
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| 278 | REAL(wp) :: zfact2, ze3t_b, ze3t_n, ze3t_a, ze3t_f, ze3t_d ! - - |
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[1438] | 279 | !!---------------------------------------------------------------------- |
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[3294] | 280 | ! |
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| 281 | IF( kt == kit000 ) THEN |
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[1438] | 282 | IF(lwp) WRITE(numout,*) |
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[3294] | 283 | IF(lwp) WRITE(numout,*) 'tra_nxt_vvl : time stepping', cdtype |
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[1438] | 284 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~' |
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| 285 | ENDIF |
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[2528] | 286 | ! |
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| 287 | IF( cdtype == 'TRA' ) THEN |
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| 288 | ll_tra = .TRUE. ! active tracers case |
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| 289 | ll_tra_hpg = ln_dynhpg_imp ! active tracers case and semi-implicit hpg |
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| 290 | ll_traqsr = ln_traqsr ! active tracers case and solar penetration |
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| 291 | ELSE |
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| 292 | ll_tra = .FALSE. ! passive tracers case |
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| 293 | ll_tra_hpg = .FALSE. ! passive tracers case or NO semi-implicit hpg |
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| 294 | ll_traqsr = .FALSE. ! active tracers case and NO solar penetration |
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| 295 | ENDIF |
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| 296 | ! |
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| 297 | DO jn = 1, kjpt |
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| 298 | DO jk = 1, jpkm1 |
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| 299 | zfact1 = atfp * rdttra(jk) |
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| 300 | zfact2 = zfact1 / rau0 |
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| 301 | DO jj = 1, jpj |
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| 302 | DO ji = 1, jpi |
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| 303 | ze3t_b = fse3t_b(ji,jj,jk) |
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| 304 | ze3t_n = fse3t_n(ji,jj,jk) |
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| 305 | ze3t_a = fse3t_a(ji,jj,jk) |
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| 306 | ! ! tracer content at Before, now and after |
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| 307 | ztc_b = ptb(ji,jj,jk,jn) * ze3t_b |
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| 308 | ztc_n = ptn(ji,jj,jk,jn) * ze3t_n |
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| 309 | ztc_a = pta(ji,jj,jk,jn) * ze3t_a |
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| 310 | ! |
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| 311 | ze3t_d = ze3t_a - 2. * ze3t_n + ze3t_b |
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| 312 | ztc_d = ztc_a - 2. * ztc_n + ztc_b |
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| 313 | ! |
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| 314 | ze3t_f = ze3t_n + atfp * ze3t_d |
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| 315 | ztc_f = ztc_n + atfp * ztc_d |
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| 316 | ! |
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| 317 | IF( ll_tra .AND. jk == 1 ) THEN ! first level only for T & S |
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| 318 | ze3t_f = ze3t_f - zfact2 * ( emp_b(ji,jj) - emp(ji,jj) ) |
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| 319 | ztc_f = ztc_f - zfact1 * ( sbc_tsc(ji,jj,jn) - sbc_tsc_b(ji,jj,jn) ) |
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| 320 | ENDIF |
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| 321 | IF( ll_traqsr .AND. jn == jp_tem .AND. jk <= nksr ) & ! solar penetration (temperature only) |
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| 322 | & ztc_f = ztc_f - zfact1 * ( qsr_hc(ji,jj,jk) - qsr_hc_b(ji,jj,jk) ) |
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[1438] | 323 | |
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[2528] | 324 | ze3t_f = 1.e0 / ze3t_f |
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| 325 | ptb(ji,jj,jk,jn) = ztc_f * ze3t_f ! ptb <-- ptn filtered |
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| 326 | ptn(ji,jj,jk,jn) = pta(ji,jj,jk,jn) ! ptn <-- pta |
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| 327 | ! |
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| 328 | IF( ll_tra_hpg ) THEN ! semi-implicit hpg (T & S only) |
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| 329 | ze3t_d = 1.e0 / ( ze3t_n + rbcp * ze3t_d ) |
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| 330 | pta(ji,jj,jk,jn) = ze3t_d * ( ztc_n + rbcp * ztc_d ) ! ta <-- Brown & Campana average |
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| 331 | ENDIF |
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[1438] | 332 | END DO |
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| 333 | END DO |
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[2528] | 334 | END DO |
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| 335 | ! |
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| 336 | END DO |
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[503] | 337 | ! |
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[1438] | 338 | END SUBROUTINE tra_nxt_vvl |
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[3] | 339 | |
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| 340 | !!====================================================================== |
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| 341 | END MODULE tranxt |
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