[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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[3] | 17 | !!---------------------------------------------------------------------- |
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[503] | 18 | |
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| 19 | !!---------------------------------------------------------------------- |
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[1110] | 20 | !! tra_nxt : time stepping on temperature and salinity |
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[1438] | 21 | !! tra_nxt_fix : time stepping on temperature and salinity : fixed volume case |
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| 22 | !! tra_nxt_vvl : time stepping on temperature and salinity : variable volume case |
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[3] | 23 | !!---------------------------------------------------------------------- |
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| 24 | USE oce ! ocean dynamics and tracers variables |
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| 25 | USE dom_oce ! ocean space and time domain variables |
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| 26 | USE zdf_oce ! ??? |
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[1438] | 27 | USE domvvl ! variable volume |
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[1601] | 28 | USE dynspg_oce ! surface pressure gradient variables |
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| 29 | USE dynhpg ! hydrostatic pressure gradient |
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[2024] | 30 | USE trdmod_oce ! ocean space and time domain variables |
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| 31 | USE trdtra ! ocean active tracers trends |
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[888] | 32 | USE phycst |
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| 33 | USE obctra ! open boundary condition (obc_tra routine) |
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[911] | 34 | USE bdytra ! Unstructured open boundary condition (bdy_tra routine) |
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[3] | 35 | USE in_out_manager ! I/O manager |
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| 36 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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[258] | 37 | USE prtctl ! Print control |
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[2024] | 38 | USE traswp ! swap array |
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[389] | 39 | USE agrif_opa_update |
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| 40 | USE agrif_opa_interp |
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[2024] | 41 | USE obc_oce |
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[3] | 42 | |
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| 43 | IMPLICIT NONE |
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| 44 | PRIVATE |
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| 45 | |
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[2024] | 46 | PUBLIC tra_nxt ! routine called by step.F90 |
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| 47 | PUBLIC tra_nxt_fix ! to be used in trcnxt |
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| 48 | PUBLIC tra_nxt_vvl ! to be used in trcnxt |
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[592] | 49 | |
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[2082] | 50 | REAL(wp), DIMENSION(jpk) :: r2dt ! vertical profile time step, =2*rdttra (leapfrog) or =rdttra (Euler) |
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[1438] | 51 | |
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[592] | 52 | !! * Substitutions |
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| 53 | # include "domzgr_substitute.h90" |
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[3] | 54 | !!---------------------------------------------------------------------- |
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[2034] | 55 | !! NEMO/OPA 3.3 , LOCEAN-IPSL (2010) |
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[1146] | 56 | !! $Id$ |
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[503] | 57 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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[3] | 58 | !!---------------------------------------------------------------------- |
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| 59 | |
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| 60 | CONTAINS |
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| 61 | |
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| 62 | SUBROUTINE tra_nxt( kt ) |
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| 63 | !!---------------------------------------------------------------------- |
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| 64 | !! *** ROUTINE tranxt *** |
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| 65 | !! |
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[1110] | 66 | !! ** Purpose : Apply the boundary condition on the after temperature |
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| 67 | !! and salinity fields, achieved the time stepping by adding |
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| 68 | !! the Asselin filter on now fields and swapping the fields. |
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[3] | 69 | !! |
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[1110] | 70 | !! ** Method : At this stage of the computation, ta and sa are the |
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| 71 | !! after temperature and salinity as the time stepping has |
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| 72 | !! been performed in trazdf_imp or trazdf_exp module. |
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[3] | 73 | !! |
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[1110] | 74 | !! - Apply lateral boundary conditions on (ta,sa) |
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| 75 | !! at the local domain boundaries through lbc_lnk call, |
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| 76 | !! at the radiative open boundaries (lk_obc=T), |
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| 77 | !! at the relaxed open boundaries (lk_bdy=T), and |
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| 78 | !! at the AGRIF zoom boundaries (lk_agrif=T) |
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| 79 | !! |
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[1438] | 80 | !! - Update lateral boundary conditions on AGRIF children |
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| 81 | !! domains (lk_agrif=T) |
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[1110] | 82 | !! |
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| 83 | !! ** Action : - (tb,sb) and (tn,sn) ready for the next time step |
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| 84 | !! - (ta,sa) time averaged (t,s) (ln_dynhpg_imp = T) |
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[503] | 85 | !!---------------------------------------------------------------------- |
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| 86 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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| 87 | !! |
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[1438] | 88 | INTEGER :: jk ! dummy loop indices |
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| 89 | REAL(wp) :: zfact ! temporary scalars |
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[2024] | 90 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: ztrdt, ztrds |
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| 91 | |
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[3] | 92 | !!---------------------------------------------------------------------- |
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| 93 | |
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[1110] | 94 | IF( kt == nit000 ) THEN |
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| 95 | IF(lwp) WRITE(numout,*) |
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| 96 | IF(lwp) WRITE(numout,*) 'tra_nxt : achieve the time stepping by Asselin filter and array swap' |
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| 97 | IF(lwp) WRITE(numout,*) '~~~~~~~' |
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[592] | 98 | ENDIF |
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| 99 | |
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[1110] | 100 | ! Update after tracer on domain lateral boundaries |
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| 101 | ! |
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[2024] | 102 | CALL lbc_lnk( tsa(:,:,:,jp_tem), 'T', 1. ) ! local domain boundaries (T-point, unchanged sign) |
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| 103 | CALL lbc_lnk( tsa(:,:,:,jp_sal), 'T', 1. ) |
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[1110] | 104 | ! |
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[2024] | 105 | #if defined key_obc || defined key_bdy || defined key_agrif |
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| 106 | CALL tra_unswap |
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| 107 | #endif |
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[3] | 108 | #if defined key_obc |
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[1970] | 109 | IF( lk_obc ) CALL obc_tra( kt ) ! OBC open boundaries |
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[3] | 110 | #endif |
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[1110] | 111 | #if defined key_bdy |
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| 112 | CALL bdy_tra( kt ) ! BDY open boundaries |
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| 113 | #endif |
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[392] | 114 | #if defined key_agrif |
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[1110] | 115 | CALL Agrif_tra ! AGRIF zoom boundaries |
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[389] | 116 | #endif |
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[2024] | 117 | #if defined key_obc || defined key_bdy || defined key_agrif |
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| 118 | CALL tra_swap |
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| 119 | #endif |
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[1438] | 120 | |
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| 121 | ! set time step size (Euler/Leapfrog) |
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[2082] | 122 | IF( neuler == 0 .AND. kt == nit000 ) THEN ; r2dt(:) = rdttra(:) ! at nit000 (Euler) |
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| 123 | ELSEIF( kt <= nit000 + 1 ) THEN ; r2dt(:) = 2.* rdttra(:) ! at nit000 or nit000+1 (Leapfrog) |
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[1438] | 124 | ENDIF |
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[3] | 125 | |
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[1110] | 126 | ! trends computation initialisation |
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[2024] | 127 | IF( l_trdtra ) THEN !* store now fields before applying the Asselin filter |
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| 128 | ALLOCATE( ztrdt(jpi,jpj,jpk) ) ; ztrdt(:,:,:) = tsn(:,:,:,jp_tem) |
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| 129 | ALLOCATE( ztrds(jpi,jpj,jpk) ) ; ztrds(:,:,:) = tsn(:,:,:,jp_sal) |
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[1110] | 130 | ENDIF |
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| 131 | |
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[1438] | 132 | ! Leap-Frog + Asselin filter time stepping |
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[2034] | 133 | IF( lk_vvl ) THEN ; CALL tra_nxt_vvl( kt, nit000, tsb, tsn, tsa, jpts ) ! variable volume level (vvl) |
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| 134 | ELSE ; CALL tra_nxt_fix( kt, nit000, tsb, tsn, tsa, jpts ) ! fixed volume level |
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[1438] | 135 | ENDIF |
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| 136 | |
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| 137 | #if defined key_agrif |
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[2024] | 138 | CALL tra_unswap |
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[1438] | 139 | ! Update tracer at AGRIF zoom boundaries |
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| 140 | IF( .NOT.Agrif_Root() ) CALL Agrif_Update_Tra( kt ) ! children only |
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[2024] | 141 | CALL tra_swap |
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[1438] | 142 | #endif |
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| 143 | |
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| 144 | ! trends computation |
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| 145 | IF( l_trdtra ) THEN ! trend of the Asselin filter (tb filtered - tb)/dt |
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[1110] | 146 | DO jk = 1, jpkm1 |
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[2082] | 147 | zfact = 1.e0 / r2dt(jk) |
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[2024] | 148 | ztrdt(:,:,jk) = ( tsb(:,:,jk,jp_tem) - ztrdt(:,:,jk) ) * zfact |
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| 149 | ztrds(:,:,jk) = ( tsb(:,:,jk,jp_sal) - ztrds(:,:,jk) ) * zfact |
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[1110] | 150 | END DO |
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[2083] | 151 | CALL trd_tra( kt, 'TRA', jp_tem, jptra_trd_atf, ztrdt ) |
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| 152 | CALL trd_tra( kt, 'TRA', jp_sal, jptra_trd_atf, ztrds ) |
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[2024] | 153 | DEALLOCATE( ztrdt ) ; DEALLOCATE( ztrds ) |
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[1438] | 154 | END IF |
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| 155 | |
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| 156 | ! ! control print |
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[2024] | 157 | IF(ln_ctl) CALL prt_ctl( tab3d_1=tsn(:,:,:,jp_tem), clinfo1=' nxt - Tn: ', mask1=tmask, & |
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| 158 | & tab3d_2=tsn(:,:,:,jp_sal), clinfo2= ' Sn: ', mask2=tmask ) |
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[1438] | 159 | ! |
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| 160 | END SUBROUTINE tra_nxt |
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| 161 | |
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[2034] | 162 | SUBROUTINE tra_nxt_fix( kt, kit000, & |
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| 163 | & ptb, ptn, pta, kjpt ) |
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[1438] | 164 | !!---------------------------------------------------------------------- |
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| 165 | !! *** ROUTINE tra_nxt_fix *** |
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| 166 | !! |
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| 167 | !! ** Purpose : fixed volume: apply the Asselin time filter and |
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| 168 | !! swap the tracer fields. |
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| 169 | !! |
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| 170 | !! ** Method : - Apply a Asselin time filter on now fields. |
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| 171 | !! - save in (ta,sa) an average over the three time levels |
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| 172 | !! which will be used to compute rdn and thus the semi-implicit |
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| 173 | !! hydrostatic pressure gradient (ln_dynhpg_imp = T) |
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| 174 | !! - swap tracer fields to prepare the next time_step. |
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| 175 | !! This can be summurized for tempearture as: |
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| 176 | !! ztm = (ta+2tn+tb)/4 ln_dynhpg_imp = T |
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| 177 | !! ztm = 0 otherwise |
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| 178 | !! tb = tn + atfp*[ tb - 2 tn + ta ] |
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| 179 | !! tn = ta |
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| 180 | !! ta = ztm (NB: reset to 0 after eos_bn2 call) |
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| 181 | !! |
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| 182 | !! ** Action : - (tb,sb) and (tn,sn) ready for the next time step |
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| 183 | !! - (ta,sa) time averaged (t,s) (ln_dynhpg_imp = T) |
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| 184 | !!---------------------------------------------------------------------- |
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[2024] | 185 | INTEGER , INTENT(in ) :: kt ! ocean time-step index |
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| 186 | INTEGER , INTENT(in ) :: kit000 ! first time-step index |
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| 187 | INTEGER , INTENT(in ) :: kjpt ! number of tracers |
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[2034] | 188 | REAL(wp), INTENT(inout), DIMENSION(jpi,jpj,jpk,kjpt) :: ptb ! before tracer fields |
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| 189 | REAL(wp), INTENT(inout), DIMENSION(jpi,jpj,jpk,kjpt) :: ptn ! now tracer fields |
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| 190 | REAL(wp), INTENT(inout), DIMENSION(jpi,jpj,jpk,kjpt) :: pta ! tracer trend |
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[1438] | 191 | !! |
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[2024] | 192 | INTEGER :: ji, jj, jk, jn ! dummy loop indices |
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| 193 | REAL(wp) :: ztm, ztf ! temporary scalars |
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[1438] | 194 | !!---------------------------------------------------------------------- |
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| 195 | |
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[2082] | 196 | IF( kt == kit000 ) THEN |
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[1438] | 197 | IF(lwp) WRITE(numout,*) |
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| 198 | IF(lwp) WRITE(numout,*) 'tra_nxt_fix : time stepping' |
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| 199 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~' |
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| 200 | ENDIF |
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| 201 | ! |
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| 202 | ! ! ----------------------- ! |
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| 203 | IF( ln_dynhpg_imp ) THEN ! semi-implicite hpg case ! |
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| 204 | ! ! ----------------------- ! |
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| 205 | ! |
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[2024] | 206 | IF( neuler == 0 .AND. kt == kit000 ) THEN ! Euler time-stepping at first time-step |
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| 207 | ! ! (only swap) |
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| 208 | DO jn = 1, kjpt |
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| 209 | DO jk = 1, jpkm1 |
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| 210 | DO jj = 1, jpj |
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| 211 | DO ji = 1, jpi |
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[2034] | 212 | ptn(ji,jj,jk,jn) = pta(ji,jj,jk,jn) ! ptb <-- ptn |
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[2024] | 213 | END DO |
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[3] | 214 | END DO |
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| 215 | END DO |
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[1110] | 216 | END DO |
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[1438] | 217 | ELSE ! general case (Leapfrog + Asselin filter |
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[2024] | 218 | DO jn = 1, kjpt |
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| 219 | DO jk = 1, jpkm1 |
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| 220 | DO jj = 1, jpj |
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| 221 | DO ji = 1, jpi |
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[2034] | 222 | ztm = 0.25 * ( pta(ji,jj,jk,jn) + 2.* ptn(ji,jj,jk,jn) + ptb(ji,jj,jk,jn) ) ! mean pt |
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| 223 | ztf = atfp * ( pta(ji,jj,jk,jn) - 2.* ptn(ji,jj,jk,jn) + ptn(ji,jj,jk,jn) ) ! Asselin filter on pt |
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| 224 | ptb(ji,jj,jk,jn) = ptn(ji,jj,jk,jn) + ztf ! ptb <-- filtered ptn |
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| 225 | ptn(ji,jj,jk,jn) = pta(ji,jj,jk,jn) ! ptn <-- pta |
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| 226 | pta(ji,jj,jk,jn) = ztm ! pta <-- mean pt |
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[2024] | 227 | END DO |
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[3] | 228 | END DO |
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| 229 | END DO |
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[1110] | 230 | END DO |
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[3] | 231 | ENDIF |
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[1438] | 232 | ! ! ----------------------- ! |
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| 233 | ELSE ! explicit hpg case ! |
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| 234 | ! ! ----------------------- ! |
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[1110] | 235 | ! |
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[2024] | 236 | IF( neuler == 0 .AND. kt == kit000 ) THEN ! Euler time-stepping at first time-step |
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| 237 | DO jn = 1, kjpt |
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| 238 | DO jk = 1, jpkm1 |
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| 239 | DO jj = 1, jpj |
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| 240 | DO ji = 1, jpi |
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[2034] | 241 | ptn(ji,jj,jk,jn) = pta(ji,jj,jk,jn) ! ptn <-- pta |
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[2024] | 242 | END DO |
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[1438] | 243 | END DO |
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| 244 | END DO |
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| 245 | END DO |
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| 246 | ELSE ! general case (Leapfrog + Asselin filter |
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[2024] | 247 | DO jn = 1, kjpt |
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| 248 | DO jk = 1, jpkm1 |
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| 249 | DO jj = 1, jpj |
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| 250 | DO ji = 1, jpi |
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[2034] | 251 | ztf = atfp * ( pta(ji,jj,jk,jn) - 2.* ptn(ji,jj,jk,jn) + ptb(ji,jj,jk,jn) ) ! Asselin filter on t |
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| 252 | ptb(ji,jj,jk,jn) = ptn(ji,jj,jk,jn) + ztf ! ptb <-- filtered ptn |
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| 253 | ptn(ji,jj,jk,jn) = pta(ji,jj,jk,jn) ! ptn <-- pta |
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[2024] | 254 | END DO |
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[1438] | 255 | END DO |
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| 256 | END DO |
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| 257 | END DO |
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| 258 | ENDIF |
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[2024] | 259 | ! |
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[1110] | 260 | ENDIF |
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[1438] | 261 | ! |
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| 262 | END SUBROUTINE tra_nxt_fix |
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[3] | 263 | |
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[2034] | 264 | SUBROUTINE tra_nxt_vvl( kt, kit000, & |
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| 265 | & ptb, ptn, pta, kjpt ) |
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[1438] | 266 | !!---------------------------------------------------------------------- |
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| 267 | !! *** ROUTINE tra_nxt_vvl *** |
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| 268 | !! |
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| 269 | !! ** Purpose : Time varying volume: apply the Asselin time filter |
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| 270 | !! and swap the tracer fields. |
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| 271 | !! |
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| 272 | !! ** Method : - Apply a thickness weighted Asselin time filter on now fields. |
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| 273 | !! - save in (ta,sa) a thickness weighted average over the three |
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| 274 | !! time levels which will be used to compute rdn and thus the semi- |
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| 275 | !! implicit hydrostatic pressure gradient (ln_dynhpg_imp = T) |
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| 276 | !! - swap tracer fields to prepare the next time_step. |
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| 277 | !! This can be summurized for tempearture as: |
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| 278 | !! ztm = (e3t_a*ta+2*e3t_n*tn+e3t_b*tb) ln_dynhpg_imp = T |
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| 279 | !! /(e3t_a +2*e3t_n +e3t_b ) |
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| 280 | !! ztm = 0 otherwise |
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| 281 | !! tb = ( e3t_n*tn + atfp*[ e3t_b*tb - 2 e3t_n*tn + e3t_a*ta ] ) |
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| 282 | !! /( e3t_n + atfp*[ e3t_b - 2 e3t_n + e3t_a ] ) |
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| 283 | !! tn = ta |
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| 284 | !! ta = zt (NB: reset to 0 after eos_bn2 call) |
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| 285 | !! |
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| 286 | !! ** Action : - (tb,sb) and (tn,sn) ready for the next time step |
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| 287 | !! - (ta,sa) time averaged (t,s) (ln_dynhpg_imp = T) |
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| 288 | !!---------------------------------------------------------------------- |
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[2024] | 289 | INTEGER , INTENT(in ) :: kt ! ocean time-step index |
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| 290 | INTEGER , INTENT(in ) :: kit000 ! first time-step index |
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| 291 | INTEGER , INTENT(in ) :: kjpt ! number of tracers |
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[2034] | 292 | REAL(wp), INTENT(inout), DIMENSION(jpi,jpj,jpk,kjpt) :: ptb ! before tracer fields |
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| 293 | REAL(wp), INTENT(inout), DIMENSION(jpi,jpj,jpk,kjpt) :: ptn ! now tracer fields |
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| 294 | REAL(wp), INTENT(inout), DIMENSION(jpi,jpj,jpk,kjpt) :: pta ! tracer trend |
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[1438] | 295 | !! |
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[2024] | 296 | INTEGER :: ji, jj, jk, jn ! dummy loop indices |
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[1438] | 297 | REAL(wp) :: ztm , ztc_f , ztf , ztca, ztcn, ztcb ! temporary scalar |
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| 298 | REAL(wp) :: ze3mr, ze3fr ! - - |
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| 299 | REAL(wp) :: ze3t_b, ze3t_n, ze3t_a, ze3t_f ! - - |
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| 300 | !!---------------------------------------------------------------------- |
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| 301 | |
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[2024] | 302 | IF( kt == kit000 ) THEN |
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[1438] | 303 | IF(lwp) WRITE(numout,*) |
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| 304 | IF(lwp) WRITE(numout,*) 'tra_nxt_vvl : time stepping' |
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| 305 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~' |
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| 306 | ENDIF |
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[2024] | 307 | ! |
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[1438] | 308 | ! ! ----------------------- ! |
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| 309 | IF( ln_dynhpg_imp ) THEN ! semi-implicite hpg case ! |
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| 310 | ! ! ----------------------- ! |
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| 311 | ! |
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[2024] | 312 | IF( neuler == 0 .AND. kt == kit000 ) THEN ! Euler time-stepping at first time-step |
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| 313 | DO jn = 1, kjpt ! (only swap) |
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| 314 | DO jk = 1, jpkm1 |
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| 315 | DO jj = 1, jpj |
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| 316 | DO ji = 1, jpi |
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[2034] | 317 | ptn(ji,jj,jk,jn) = pta(ji,jj,jk,jn) ! tn <-- ta |
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[2024] | 318 | END DO |
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[1438] | 319 | END DO |
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| 320 | END DO |
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| 321 | END DO |
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| 322 | ELSE |
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[2024] | 323 | DO jn = 1, kjpt ! (only swap) |
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| 324 | DO jk = 1, jpkm1 |
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| 325 | DO jj = 1, jpj |
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| 326 | DO ji = 1, jpi |
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| 327 | ze3t_b = fse3t_b(ji,jj,jk) |
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| 328 | ze3t_n = fse3t_n(ji,jj,jk) |
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| 329 | ze3t_a = fse3t_a(ji,jj,jk) |
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| 330 | ! ! tracer content at Before, now and after |
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[2034] | 331 | ztcb = ptb(ji,jj,jk,jn) * ze3t_b |
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| 332 | ztcn = ptn(ji,jj,jk,jn) * ze3t_n |
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| 333 | ztca = pta(ji,jj,jk,jn) * ze3t_a |
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[2024] | 334 | ! |
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| 335 | ! ! Asselin filter on thickness and tracer content |
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| 336 | ze3t_f = atfp * ( ze3t_a - 2.* ze3t_n + ze3t_b ) |
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| 337 | ztc_f = atfp * ( ztca - 2.* ztcn + ztcb ) |
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| 338 | ! |
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| 339 | ! ! filtered tracer including the correction |
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| 340 | ze3fr = 1.e0 / ( ze3t_n + ze3t_f ) |
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| 341 | ztf = ze3fr * ( ztcn + ztc_f ) |
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| 342 | ! ! mean thickness and tracer |
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| 343 | ze3mr = 1.e0 / ( ze3t_a + 2.* ze3t_n + ze3t_b ) |
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| 344 | ztm = ze3mr * ( ztca + 2.* ztcn + ztcb ) |
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| 345 | !!gm mean e3t have to be saved and used in dynhpg or it can be recomputed in dynhpg !! |
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| 346 | !!gm e3t_m(ji,jj,jk) = 0.25 / ze3mr |
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| 347 | ! ! swap of arrays |
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[2034] | 348 | ptb(ji,jj,jk,jn) = ztf ! ptb <-- ptn + filter |
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| 349 | ptn(ji,jj,jk,jn) = pta(ji,jj,jk,jn) ! ptn <-- pta |
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| 350 | pta(ji,jj,jk,jn) = ztm ! pta <-- mean t |
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[2024] | 351 | END DO |
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[1438] | 352 | END DO |
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| 353 | END DO |
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| 354 | END DO |
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| 355 | ENDIF |
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| 356 | ! ! ----------------------- ! |
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| 357 | ELSE ! explicit hpg case ! |
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| 358 | ! ! ----------------------- ! |
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| 359 | ! |
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[2024] | 360 | IF( neuler == 0 .AND. kt == kit000 ) THEN ! case of Euler time-stepping at first time-step |
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| 361 | DO jn = 1, kjpt ! No filter nor thickness weighting computation required |
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| 362 | DO jk = 1, jpkm1 ! ONLY swap |
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| 363 | DO jj = 1, jpj |
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| 364 | DO ji = 1, jpi |
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[2034] | 365 | ptn(ji,jj,jk,jn) = pta(ji,jj,jk,jn) ! tn <-- ta |
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[2024] | 366 | END DO |
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[1438] | 367 | END DO |
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| 368 | END DO |
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| 369 | END DO |
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| 370 | ! ! general case (Leapfrog + Asselin filter) |
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| 371 | ELSE ! apply filter on thickness weighted tracer and swap |
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[2024] | 372 | DO jn = 1, kjpt |
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| 373 | DO jk = 1, jpkm1 |
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| 374 | DO jj = 1, jpj |
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| 375 | DO ji = 1, jpi |
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| 376 | ze3t_b = fse3t_b(ji,jj,jk) |
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| 377 | ze3t_n = fse3t_n(ji,jj,jk) |
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| 378 | ze3t_a = fse3t_a(ji,jj,jk) |
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| 379 | ! ! tracer content at Before, now and after |
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[2034] | 380 | ztcb = ptb(ji,jj,jk,jn) * ze3t_b |
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| 381 | ztcn = ptn(ji,jj,jk,jn) * ze3t_n |
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| 382 | ztca = pta(ji,jj,jk,jn) * ze3t_a |
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[2024] | 383 | ! |
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| 384 | ! ! Asselin filter on thickness and tracer content |
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| 385 | ze3t_f = atfp * ( ze3t_a - 2.* ze3t_n + ze3t_b ) |
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| 386 | ztc_f = atfp * ( ztca - 2.* ztcn + ztcb ) |
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| 387 | ! |
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| 388 | ! ! filtered tracer including the correction |
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| 389 | ze3fr = 1.e0 / ( ze3t_n + ze3t_f ) |
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| 390 | ztf = ( ztcn + ztc_f ) * ze3fr |
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| 391 | ! ! swap of arrays |
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[2034] | 392 | ptb(ji,jj,jk,jn) = ztf ! tb <-- tn filtered |
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| 393 | ptn(ji,jj,jk,jn) = pta(ji,jj,jk,jn) ! tn <-- ta |
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[2024] | 394 | END DO |
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[1438] | 395 | END DO |
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| 396 | END DO |
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| 397 | END DO |
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| 398 | ENDIF |
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| 399 | ENDIF |
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[503] | 400 | ! |
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[1438] | 401 | END SUBROUTINE tra_nxt_vvl |
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[3] | 402 | |
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| 403 | !!====================================================================== |
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| 404 | END MODULE tranxt |
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