[3] | 1 | MODULE traadv_tvd |
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| 2 | !!============================================================================== |
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| 3 | !! *** MODULE traadv_tvd *** |
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[2024] | 4 | !! Ocean tracers: horizontal & vertical advective trend |
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[3] | 5 | !!============================================================================== |
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[2104] | 6 | !! History : OPA ! 1995-12 (L. Mortier) Original code |
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| 7 | !! ! 2000-01 (H. Loukos) adapted to ORCA |
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| 8 | !! ! 2000-10 (MA Foujols E.Kestenare) include file not routine |
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| 9 | !! ! 2000-12 (E. Kestenare M. Levy) fix bug in trtrd indexes |
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| 10 | !! ! 2001-07 (E. Durand G. Madec) adaptation to ORCA config |
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| 11 | !! 8.5 ! 2002-06 (G. Madec) F90: Free form and module |
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| 12 | !! NEMO 1.0 ! 2004-01 (A. de Miranda, G. Madec, J.M. Molines ): advective bbl |
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| 13 | !! 2.0 ! 2008-04 (S. Cravatte) add the i-, j- & k- trends computation |
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| 14 | !! - ! 2009-11 (V. Garnier) Surface pressure gradient organization |
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| 15 | !! 3.3 ! 2010-05 (C. Ethe, G. Madec) merge TRC-TRA + switch from velocity to transport |
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[503] | 16 | !!---------------------------------------------------------------------- |
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[3] | 17 | |
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| 18 | !!---------------------------------------------------------------------- |
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| 19 | !! tra_adv_tvd : update the tracer trend with the horizontal |
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| 20 | !! and vertical advection trends using a TVD scheme |
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| 21 | !! nonosc : compute monotonic tracer fluxes by a nonoscillatory |
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| 22 | !! algorithm |
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| 23 | !!---------------------------------------------------------------------- |
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| 24 | USE oce ! ocean dynamics and active tracers |
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| 25 | USE dom_oce ! ocean space and time domain |
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[2024] | 26 | USE trdmod_oce ! tracers trends |
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| 27 | USE trdtra ! tracers trends |
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[3] | 28 | USE in_out_manager ! I/O manager |
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[367] | 29 | USE dynspg_oce ! choice/control of key cpp for surface pressure gradient |
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[3] | 30 | USE lib_mpp |
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[74] | 31 | USE lbclnk ! ocean lateral boundary condition (or mpp link) |
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[132] | 32 | USE diaptr ! poleward transport diagnostics |
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[2082] | 33 | USE trc_oce ! share passive tracers/Ocean variables |
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[3] | 34 | |
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[74] | 35 | |
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[3] | 36 | IMPLICIT NONE |
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| 37 | PRIVATE |
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| 38 | |
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[503] | 39 | PUBLIC tra_adv_tvd ! routine called by step.F90 |
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[3] | 40 | |
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[2024] | 41 | LOGICAL :: l_trd ! flag to compute trends |
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| 42 | |
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[3] | 43 | !! * Substitutions |
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| 44 | # include "domzgr_substitute.h90" |
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| 45 | # include "vectopt_loop_substitute.h90" |
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| 46 | !!---------------------------------------------------------------------- |
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[2287] | 47 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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[1152] | 48 | !! $Id$ |
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[2287] | 49 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[3] | 50 | !!---------------------------------------------------------------------- |
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| 51 | |
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| 52 | CONTAINS |
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| 53 | |
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[2104] | 54 | SUBROUTINE tra_adv_tvd ( kt, cdtype, p2dt, pun, pvn, pwn, & |
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[2082] | 55 | & ptb, ptn, pta, kjpt ) |
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[3] | 56 | !!---------------------------------------------------------------------- |
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| 57 | !! *** ROUTINE tra_adv_tvd *** |
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| 58 | !! |
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| 59 | !! ** Purpose : Compute the now trend due to total advection of |
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| 60 | !! tracers and add it to the general trend of tracer equations |
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| 61 | !! |
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| 62 | !! ** Method : TVD scheme, i.e. 2nd order centered scheme with |
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| 63 | !! corrected flux (monotonic correction) |
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| 64 | !! note: - this advection scheme needs a leap-frog time scheme |
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| 65 | !! |
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[2034] | 66 | !! ** Action : - update (pta) with the now advective tracer trends |
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[2024] | 67 | !! - save the trends |
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[503] | 68 | !!---------------------------------------------------------------------- |
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[2024] | 69 | USE oce , zwx => ua ! use ua as workspace |
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| 70 | USE oce , zwy => va ! use va as workspace |
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[2034] | 71 | !! |
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[2104] | 72 | INTEGER , INTENT(in ) :: kt ! ocean time-step index |
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| 73 | CHARACTER(len=3) , INTENT(in ) :: cdtype ! =TRA or TRC (tracer indicator) |
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| 74 | INTEGER , INTENT(in ) :: kjpt ! number of tracers |
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| 75 | REAL(wp), DIMENSION( jpk ), INTENT(in ) :: p2dt ! vertical profile of tracer time-step |
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| 76 | REAL(wp), DIMENSION(jpi,jpj,jpk ), INTENT(in ) :: pun, pvn, pwn ! 3 ocean velocity components |
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| 77 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(in ) :: ptb, ptn ! before and now tracer fields |
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| 78 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(inout) :: pta ! tracer trend |
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[2034] | 79 | !! |
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[2104] | 80 | INTEGER :: ji, jj, jk, jn ! dummy loop indices |
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| 81 | REAL(wp) :: z2dtt, zbtr, ztra ! local scalar |
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| 82 | REAL(wp) :: zfp_ui, zfp_vj, zfp_wk ! - - |
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| 83 | REAL(wp) :: zfm_ui, zfm_vj, zfm_wk ! - - |
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| 84 | REAL(wp), DIMENSION (jpi,jpj,jpk) :: zwi, zwz ! 3D workspace |
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| 85 | REAL(wp), DIMENSION (:,:,:), ALLOCATABLE :: ztrdx, ztrdy, ztrdz |
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[3] | 86 | !!---------------------------------------------------------------------- |
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| 87 | |
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[2104] | 88 | IF( kt == nit000 ) THEN |
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[3] | 89 | WRITE(numout,*) |
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[2082] | 90 | WRITE(numout,*) 'tra_adv_tvd : TVD advection scheme on ', cdtype |
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[3] | 91 | WRITE(numout,*) '~~~~~~~~~~~' |
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[2024] | 92 | ! |
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| 93 | l_trd = .FALSE. |
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| 94 | IF( ( cdtype == 'TRA' .AND. l_trdtra ) .OR. ( cdtype == 'TRC' .AND. l_trdtrc ) ) l_trd = .TRUE. |
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[3] | 95 | ENDIF |
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[2024] | 96 | ! |
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| 97 | IF( l_trd ) THEN |
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[2104] | 98 | ALLOCATE( ztrdx(jpi,jpj,jpk) ) ; ztrdx(:,:,:) = 0.e0 |
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| 99 | ALLOCATE( ztrdy(jpi,jpj,jpk) ) ; ztrdy(:,:,:) = 0.e0 |
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| 100 | ALLOCATE( ztrdz(jpi,jpj,jpk) ) ; ztrdz(:,:,:) = 0.e0 |
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[2024] | 101 | END IF |
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| 102 | ! |
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[2082] | 103 | zwi(:,:,:) = 0.e0 |
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[2024] | 104 | ! |
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| 105 | ! ! =========== |
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| 106 | DO jn = 1, kjpt ! tracer loop |
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| 107 | ! ! =========== |
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| 108 | ! 1. Bottom value : flux set to zero |
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| 109 | ! ---------------------------------- |
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| 110 | zwx(:,:,jpk) = 0.e0 ; zwz(:,:,jpk) = 0.e0 |
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| 111 | zwy(:,:,jpk) = 0.e0 ; zwi(:,:,jpk) = 0.e0 |
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[3] | 112 | |
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[2024] | 113 | ! 2. upstream advection with initial mass fluxes & intermediate update |
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| 114 | ! -------------------------------------------------------------------- |
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| 115 | ! upstream tracer flux in the i and j direction |
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| 116 | DO jk = 1, jpkm1 |
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| 117 | DO jj = 1, jpjm1 |
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| 118 | DO ji = 1, fs_jpim1 ! vector opt. |
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| 119 | ! upstream scheme |
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| 120 | zfp_ui = pun(ji,jj,jk) + ABS( pun(ji,jj,jk) ) |
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| 121 | zfm_ui = pun(ji,jj,jk) - ABS( pun(ji,jj,jk) ) |
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| 122 | zfp_vj = pvn(ji,jj,jk) + ABS( pvn(ji,jj,jk) ) |
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| 123 | zfm_vj = pvn(ji,jj,jk) - ABS( pvn(ji,jj,jk) ) |
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[2034] | 124 | zwx(ji,jj,jk) = 0.5 * ( zfp_ui * ptb(ji,jj,jk,jn) + zfm_ui * ptb(ji+1,jj ,jk,jn) ) |
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| 125 | zwy(ji,jj,jk) = 0.5 * ( zfp_vj * ptb(ji,jj,jk,jn) + zfm_vj * ptb(ji ,jj+1,jk,jn) ) |
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[2024] | 126 | END DO |
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[3] | 127 | END DO |
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| 128 | END DO |
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| 129 | |
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[2024] | 130 | ! upstream tracer flux in the k direction |
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| 131 | ! Surface value |
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| 132 | IF( lk_vvl ) THEN ; zwz(:,:, 1 ) = 0.e0 ! volume variable |
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[2034] | 133 | ELSE ; zwz(:,:, 1 ) = pwn(:,:,1) * ptb(:,:,1,jn) ! linear free surface |
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[2024] | 134 | ENDIF |
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| 135 | ! Interior value |
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| 136 | DO jk = 2, jpkm1 |
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| 137 | DO jj = 1, jpj |
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| 138 | DO ji = 1, jpi |
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| 139 | zfp_wk = pwn(ji,jj,jk) + ABS( pwn(ji,jj,jk) ) |
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| 140 | zfm_wk = pwn(ji,jj,jk) - ABS( pwn(ji,jj,jk) ) |
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[2034] | 141 | zwz(ji,jj,jk) = 0.5 * ( zfp_wk * ptb(ji,jj,jk,jn) + zfm_wk * ptb(ji,jj,jk-1,jn) ) |
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[2024] | 142 | END DO |
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[3] | 143 | END DO |
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| 144 | END DO |
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| 145 | |
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[2024] | 146 | ! total advective trend |
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[216] | 147 | DO jk = 1, jpkm1 |
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[2082] | 148 | z2dtt = p2dt(jk) |
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[216] | 149 | DO jj = 2, jpjm1 |
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| 150 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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[503] | 151 | zbtr = 1. / ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) ) |
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[2024] | 152 | ! total intermediate advective trends |
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| 153 | ztra = - zbtr * ( zwx(ji,jj,jk) - zwx(ji-1,jj ,jk ) & |
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| 154 | & + zwy(ji,jj,jk) - zwy(ji ,jj-1,jk ) & |
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| 155 | & + zwz(ji,jj,jk) - zwz(ji ,jj ,jk+1) ) |
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| 156 | ! update and guess with monotonic sheme |
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[2034] | 157 | pta(ji,jj,jk,jn) = pta(ji,jj,jk,jn) + ztra |
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| 158 | zwi(ji,jj,jk) = ( ptb(ji,jj,jk,jn) + z2dtt * ztra ) * tmask(ji,jj,jk) |
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[216] | 159 | END DO |
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| 160 | END DO |
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| 161 | END DO |
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[2024] | 162 | ! ! Lateral boundary conditions on zwi (unchanged sign) |
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| 163 | CALL lbc_lnk( zwi, 'T', 1. ) |
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| 164 | |
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| 165 | ! ! trend diagnostics (contribution of upstream fluxes) |
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| 166 | IF( l_trd ) THEN |
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| 167 | ! store intermediate advective trends |
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| 168 | ztrdx(:,:,:) = zwx(:,:,:) ; ztrdy(:,:,:) = zwy(:,:,:) ; ztrdz(:,:,:) = zwz(:,:,:) |
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| 169 | END IF |
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| 170 | ! ! "Poleward" heat and salt transports (contribution of upstream fluxes) |
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| 171 | IF( cdtype == 'TRA' .AND. ln_diaptr .AND. ( MOD( kt, nf_ptr ) == 0 ) ) THEN |
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| 172 | IF( jn == jp_tem ) pht_adv(:) = ptr_vj( zwy(:,:,:) ) |
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| 173 | IF( jn == jp_sal ) pst_adv(:) = ptr_vj( zwy(:,:,:) ) |
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| 174 | ENDIF |
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| 175 | |
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| 176 | ! 3. antidiffusive flux : high order minus low order |
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| 177 | ! -------------------------------------------------- |
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| 178 | ! antidiffusive flux on i and j |
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[503] | 179 | DO jk = 1, jpkm1 |
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[2024] | 180 | DO jj = 1, jpjm1 |
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| 181 | DO ji = 1, fs_jpim1 ! vector opt. |
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[2034] | 182 | zwx(ji,jj,jk) = 0.5 * pun(ji,jj,jk) * ( ptn(ji,jj,jk,jn) + ptn(ji+1,jj,jk,jn) ) - zwx(ji,jj,jk) |
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| 183 | zwy(ji,jj,jk) = 0.5 * pvn(ji,jj,jk) * ( ptn(ji,jj,jk,jn) + ptn(ji,jj+1,jk,jn) ) - zwy(ji,jj,jk) |
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[503] | 184 | END DO |
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| 185 | END DO |
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| 186 | END DO |
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[2024] | 187 | |
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| 188 | ! antidiffusive flux on k |
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[2104] | 189 | zwz(:,:,1) = 0.e0 ! Surface value |
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| 190 | ! |
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| 191 | DO jk = 2, jpkm1 ! Interior value |
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[2024] | 192 | DO jj = 1, jpj |
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| 193 | DO ji = 1, jpi |
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[2034] | 194 | zwz(ji,jj,jk) = 0.5 * pwn(ji,jj,jk) * ( ptn(ji,jj,jk,jn) + ptn(ji,jj,jk-1,jn) ) - zwz(ji,jj,jk) |
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[503] | 195 | END DO |
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| 196 | END DO |
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| 197 | END DO |
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[2104] | 198 | CALL lbc_lnk( zwx, 'U', -1. ) ; CALL lbc_lnk( zwy, 'V', -1. ) ! Lateral bondary conditions |
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[2024] | 199 | CALL lbc_lnk( zwz, 'W', 1. ) |
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[3] | 200 | |
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[2024] | 201 | ! 4. monotonicity algorithm |
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| 202 | ! ------------------------- |
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[2082] | 203 | CALL nonosc( ptb(:,:,:,jn), zwx, zwy, zwz, zwi, p2dt ) |
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[3] | 204 | |
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| 205 | |
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[2024] | 206 | ! 5. final trend with corrected fluxes |
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| 207 | ! ------------------------------------ |
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[216] | 208 | DO jk = 1, jpkm1 |
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| 209 | DO jj = 2, jpjm1 |
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[2024] | 210 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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[503] | 211 | zbtr = 1. / ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) ) |
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[2024] | 212 | ! total advective trends |
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| 213 | ztra = - zbtr * ( zwx(ji,jj,jk) - zwx(ji-1,jj ,jk ) & |
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| 214 | & + zwy(ji,jj,jk) - zwy(ji ,jj-1,jk ) & |
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| 215 | & + zwz(ji,jj,jk) - zwz(ji ,jj ,jk+1) ) |
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| 216 | ! add them to the general tracer trends |
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[2034] | 217 | pta(ji,jj,jk,jn) = pta(ji,jj,jk,jn) + ztra |
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[216] | 218 | END DO |
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| 219 | END DO |
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| 220 | END DO |
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[2024] | 221 | |
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| 222 | ! ! trend diagnostics (contribution of upstream fluxes) |
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| 223 | IF( l_trd ) THEN |
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| 224 | ztrdx(:,:,:) = ztrdx(:,:,:) + zwx(:,:,:) ! <<< Add to previously computed |
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| 225 | ztrdy(:,:,:) = ztrdy(:,:,:) + zwy(:,:,:) ! <<< Add to previously computed |
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| 226 | ztrdz(:,:,:) = ztrdz(:,:,:) + zwz(:,:,:) ! <<< Add to previously computed |
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| 227 | |
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[2083] | 228 | CALL trd_tra( kt, cdtype, jn, jptra_trd_xad, ztrdx, pun, ptn(:,:,:,jn) ) |
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| 229 | CALL trd_tra( kt, cdtype, jn, jptra_trd_yad, ztrdy, pvn, ptn(:,:,:,jn) ) |
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| 230 | CALL trd_tra( kt, cdtype, jn, jptra_trd_zad, ztrdz, pwn, ptn(:,:,:,jn) ) |
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[2024] | 231 | END IF |
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| 232 | ! ! "Poleward" heat and salt transports (contribution of upstream fluxes) |
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| 233 | IF( cdtype == 'TRA' .AND. ln_diaptr .AND. ( MOD( kt, nf_ptr ) == 0 ) ) THEN |
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| 234 | IF( jn == jp_tem ) pht_adv(:) = ptr_vj( zwy(:,:,:) ) + pht_adv(:) |
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| 235 | IF( jn == jp_sal ) pst_adv(:) = ptr_vj( zwy(:,:,:) ) + pst_adv(:) |
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| 236 | ENDIF |
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[503] | 237 | ! |
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[2024] | 238 | ENDDO |
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[503] | 239 | ! |
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[2024] | 240 | IF( l_trd ) THEN |
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| 241 | DEALLOCATE( ztrdx ) ; DEALLOCATE( ztrdy ) ; DEALLOCATE( ztrdz ) |
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| 242 | END IF |
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| 243 | ! |
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[3] | 244 | END SUBROUTINE tra_adv_tvd |
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| 245 | |
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| 246 | |
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[2082] | 247 | SUBROUTINE nonosc( pbef, paa, pbb, pcc, paft, p2dt ) |
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[3] | 248 | !!--------------------------------------------------------------------- |
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| 249 | !! *** ROUTINE nonosc *** |
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| 250 | !! |
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| 251 | !! ** Purpose : compute monotonic tracer fluxes from the upstream |
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| 252 | !! scheme and the before field by a nonoscillatory algorithm |
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| 253 | !! |
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| 254 | !! ** Method : ... ??? |
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| 255 | !! warning : pbef and paft must be masked, but the boundaries |
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| 256 | !! conditions on the fluxes are not necessary zalezak (1979) |
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| 257 | !! drange (1995) multi-dimensional forward-in-time and upstream- |
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| 258 | !! in-space based differencing for fluid |
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| 259 | !!---------------------------------------------------------------------- |
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[2104] | 260 | REAL(wp), DIMENSION(jpk) , INTENT(in ) :: p2dt ! vertical profile of tracer time-step |
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| 261 | REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(in ) :: pbef, paft ! before & after field |
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| 262 | REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(inout) :: paa, pbb, pcc ! monotonic fluxes in the 3 directions |
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[503] | 263 | !! |
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[3] | 264 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 265 | INTEGER :: ikm1 |
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| 266 | REAL(wp), DIMENSION (jpi,jpj,jpk) :: zbetup, zbetdo |
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[785] | 267 | REAL(wp), DIMENSION (jpi,jpj,jpk) :: zbup, zbdo |
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[3] | 268 | REAL(wp) :: zpos, zneg, zbt, za, zb, zc, zbig, zrtrn, z2dtt |
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[785] | 269 | REAL(wp) :: zau, zbu, zcu, zav, zbv, zcv |
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| 270 | REAL(wp) :: zup, zdo |
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[3] | 271 | !!---------------------------------------------------------------------- |
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| 272 | |
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| 273 | zbig = 1.e+40 |
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| 274 | zrtrn = 1.e-15 |
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[785] | 275 | zbetup(:,:,jpk) = 0.e0 ; zbetdo(:,:,jpk) = 0.e0 |
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[3] | 276 | |
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[785] | 277 | |
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[3] | 278 | ! Search local extrema |
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| 279 | ! -------------------- |
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[785] | 280 | ! max/min of pbef & paft with large negative/positive value (-/+zbig) inside land |
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| 281 | zbup = MAX( pbef * tmask - zbig * ( 1.e0 - tmask ), & |
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| 282 | & paft * tmask - zbig * ( 1.e0 - tmask ) ) |
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| 283 | zbdo = MIN( pbef * tmask + zbig * ( 1.e0 - tmask ), & |
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| 284 | & paft * tmask + zbig * ( 1.e0 - tmask ) ) |
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| 285 | |
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[3] | 286 | DO jk = 1, jpkm1 |
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| 287 | ikm1 = MAX(jk-1,1) |
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[2082] | 288 | z2dtt = p2dt(jk) |
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[3] | 289 | DO jj = 2, jpjm1 |
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| 290 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 291 | |
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[785] | 292 | ! search maximum in neighbourhood |
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| 293 | zup = MAX( zbup(ji ,jj ,jk ), & |
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| 294 | & zbup(ji-1,jj ,jk ), zbup(ji+1,jj ,jk ), & |
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| 295 | & zbup(ji ,jj-1,jk ), zbup(ji ,jj+1,jk ), & |
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| 296 | & zbup(ji ,jj ,ikm1), zbup(ji ,jj ,jk+1) ) |
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[3] | 297 | |
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[785] | 298 | ! search minimum in neighbourhood |
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| 299 | zdo = MIN( zbdo(ji ,jj ,jk ), & |
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| 300 | & zbdo(ji-1,jj ,jk ), zbdo(ji+1,jj ,jk ), & |
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| 301 | & zbdo(ji ,jj-1,jk ), zbdo(ji ,jj+1,jk ), & |
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| 302 | & zbdo(ji ,jj ,ikm1), zbdo(ji ,jj ,jk+1) ) |
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[3] | 303 | |
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[785] | 304 | ! positive part of the flux |
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[3] | 305 | zpos = MAX( 0., paa(ji-1,jj ,jk ) ) - MIN( 0., paa(ji ,jj ,jk ) ) & |
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| 306 | & + MAX( 0., pbb(ji ,jj-1,jk ) ) - MIN( 0., pbb(ji ,jj ,jk ) ) & |
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| 307 | & + MAX( 0., pcc(ji ,jj ,jk+1) ) - MIN( 0., pcc(ji ,jj ,jk ) ) |
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[785] | 308 | |
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| 309 | ! negative part of the flux |
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[3] | 310 | zneg = MAX( 0., paa(ji ,jj ,jk ) ) - MIN( 0., paa(ji-1,jj ,jk ) ) & |
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| 311 | & + MAX( 0., pbb(ji ,jj ,jk ) ) - MIN( 0., pbb(ji ,jj-1,jk ) ) & |
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| 312 | & + MAX( 0., pcc(ji ,jj ,jk ) ) - MIN( 0., pcc(ji ,jj ,jk+1) ) |
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[785] | 313 | |
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[3] | 314 | ! up & down beta terms |
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| 315 | zbt = e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) / z2dtt |
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[785] | 316 | zbetup(ji,jj,jk) = ( zup - paft(ji,jj,jk) ) / ( zpos + zrtrn ) * zbt |
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| 317 | zbetdo(ji,jj,jk) = ( paft(ji,jj,jk) - zdo ) / ( zneg + zrtrn ) * zbt |
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[3] | 318 | END DO |
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| 319 | END DO |
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| 320 | END DO |
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[2104] | 321 | CALL lbc_lnk( zbetup, 'T', 1. ) ; CALL lbc_lnk( zbetdo, 'T', 1. ) ! lateral boundary cond. (unchanged sign) |
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[3] | 322 | |
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| 323 | |
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| 324 | |
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[237] | 325 | ! 3. monotonic flux in the i & j direction (paa & pbb) |
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| 326 | ! ---------------------------------------- |
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[3] | 327 | DO jk = 1, jpkm1 |
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| 328 | DO jj = 2, jpjm1 |
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| 329 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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[785] | 330 | zau = MIN( 1.e0, zbetdo(ji,jj,jk), zbetup(ji+1,jj,jk) ) |
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| 331 | zbu = MIN( 1.e0, zbetup(ji,jj,jk), zbetdo(ji+1,jj,jk) ) |
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| 332 | zcu = ( 0.5 + SIGN( 0.5 , paa(ji,jj,jk) ) ) |
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| 333 | paa(ji,jj,jk) = paa(ji,jj,jk) * ( zcu * zau + ( 1.e0 - zcu) * zbu ) |
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[3] | 334 | |
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[785] | 335 | zav = MIN( 1.e0, zbetdo(ji,jj,jk), zbetup(ji,jj+1,jk) ) |
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| 336 | zbv = MIN( 1.e0, zbetup(ji,jj,jk), zbetdo(ji,jj+1,jk) ) |
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| 337 | zcv = ( 0.5 + SIGN( 0.5 , pbb(ji,jj,jk) ) ) |
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| 338 | pbb(ji,jj,jk) = pbb(ji,jj,jk) * ( zcv * zav + ( 1.e0 - zcv) * zbv ) |
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[3] | 339 | |
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| 340 | ! monotonic flux in the k direction, i.e. pcc |
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| 341 | ! ------------------------------------------- |
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[785] | 342 | za = MIN( 1., zbetdo(ji,jj,jk+1), zbetup(ji,jj,jk) ) |
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| 343 | zb = MIN( 1., zbetup(ji,jj,jk+1), zbetdo(ji,jj,jk) ) |
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| 344 | zc = ( 0.5 + SIGN( 0.5 , pcc(ji,jj,jk+1) ) ) |
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| 345 | pcc(ji,jj,jk+1) = pcc(ji,jj,jk+1) * ( zc * za + ( 1.e0 - zc) * zb ) |
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[3] | 346 | END DO |
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| 347 | END DO |
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| 348 | END DO |
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[2104] | 349 | CALL lbc_lnk( paa, 'U', -1. ) ; CALL lbc_lnk( pbb, 'V', -1. ) ! lateral boundary condition (changed sign) |
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[503] | 350 | ! |
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[3] | 351 | END SUBROUTINE nonosc |
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| 352 | |
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| 353 | !!====================================================================== |
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| 354 | END MODULE traadv_tvd |
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