[3] | 1 | MODULE trazdf_imp |
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[1438] | 2 | !!====================================================================== |
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[457] | 3 | !! *** MODULE trazdf_imp *** |
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[2528] | 4 | !! Ocean tracers: vertical component of the tracer mixing trend |
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[1438] | 5 | !!====================================================================== |
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| 6 | !! History : OPA ! 1990-10 (B. Blanke) Original code |
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| 7 | !! 7.0 ! 1991-11 (G. Madec) |
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| 8 | !! ! 1992-06 (M. Imbard) correction on tracer trend loops |
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| 9 | !! ! 1996-01 (G. Madec) statement function for e3 |
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| 10 | !! ! 1997-05 (G. Madec) vertical component of isopycnal |
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| 11 | !! ! 1997-07 (G. Madec) geopotential diffusion in s-coord |
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| 12 | !! ! 2000-08 (G. Madec) double diffusive mixing |
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| 13 | !! NEMO 1.0 ! 2002-08 (G. Madec) F90: Free form and module |
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| 14 | !! 2.0 ! 2006-11 (G. Madec) New step reorganisation |
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| 15 | !! 3.2 ! 2009-03 (G. Madec) heat and salt content trends |
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[2528] | 16 | !! 3.3 ! 2010-06 (C. Ethe, G. Madec) Merge TRA-TRC |
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[2602] | 17 | !! - ! 2011-02 (A. Coward, C. Ethe, G. Madec) improvment of surface boundary condition |
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[3] | 18 | !!---------------------------------------------------------------------- |
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[1438] | 19 | |
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| 20 | !!---------------------------------------------------------------------- |
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[457] | 21 | !! tra_zdf_imp : Update the tracer trend with the diagonal vertical |
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| 22 | !! part of the mixing tensor. |
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[3] | 23 | !!---------------------------------------------------------------------- |
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[457] | 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 ! ocean vertical physics variables |
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[2528] | 27 | USE trc_oce ! share passive tracers/ocean variables |
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| 28 | USE domvvl ! variable volume |
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[216] | 29 | USE ldftra_oce ! ocean active tracers: lateral physics |
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[2528] | 30 | USE ldftra ! lateral mixing type |
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[457] | 31 | USE ldfslp ! lateral physics: slope of diffusion |
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| 32 | USE zdfddm ! ocean vertical physics: double diffusion |
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[2528] | 33 | USE traldf_iso_grif ! active tracers: Griffies operator |
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[3] | 34 | USE in_out_manager ! I/O manager |
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[457] | 35 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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[2715] | 36 | USE lib_mpp ! MPP library |
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[3] | 37 | |
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| 38 | IMPLICIT NONE |
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| 39 | PRIVATE |
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| 40 | |
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[1438] | 41 | PUBLIC tra_zdf_imp ! routine called by step.F90 |
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[3] | 42 | |
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[2602] | 43 | REAL(wp) :: r_vvl ! variable volume indicator, =1 if lk_vvl=T, =0 otherwise |
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| 44 | |
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[3211] | 45 | !! * Control permutation of array indices |
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| 46 | # include "oce_ftrans.h90" |
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| 47 | # include "dom_oce_ftrans.h90" |
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| 48 | # include "zdf_oce_ftrans.h90" |
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| 49 | # include "trc_oce_ftrans.h90" |
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| 50 | # include "domvvl_ftrans.h90" |
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| 51 | # include "ldftra_oce_ftrans.h90" |
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| 52 | # include "ldfslp_ftrans.h90" |
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| 53 | # include "zdfddm_ftrans.h90" |
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| 54 | # include "traldf_iso_grif_ftrans.h90" |
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| 55 | |
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[3] | 56 | !! * Substitutions |
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| 57 | # include "domzgr_substitute.h90" |
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[457] | 58 | # include "ldftra_substitute.h90" |
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[3] | 59 | # include "zdfddm_substitute.h90" |
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[457] | 60 | # include "vectopt_loop_substitute.h90" |
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[3] | 61 | !!---------------------------------------------------------------------- |
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[2528] | 62 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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[1156] | 63 | !! $Id$ |
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[2528] | 64 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[457] | 65 | !!---------------------------------------------------------------------- |
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[3] | 66 | CONTAINS |
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[2528] | 67 | |
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| 68 | SUBROUTINE tra_zdf_imp( kt, cdtype, p2dt, ptb, pta, kjpt ) |
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[3] | 69 | !!---------------------------------------------------------------------- |
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| 70 | !! *** ROUTINE tra_zdf_imp *** |
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| 71 | !! |
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[2602] | 72 | !! ** Purpose : Compute the after tracer through a implicit computation |
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| 73 | !! of the vertical tracer diffusion (including the vertical component |
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| 74 | !! of lateral mixing (only for 2nd order operator, for fourth order |
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| 75 | !! it is already computed and add to the general trend in traldf) |
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[3] | 76 | !! |
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[2602] | 77 | !! ** Method : The vertical diffusion of the tracer t is given by: |
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| 78 | !! difft = dz( avt dz(t) ) = 1/e3t dk+1( avt/e3w dk(t) ) |
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[457] | 79 | !! It is computed using a backward time scheme (t=ta). |
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[2602] | 80 | !! If lk_zdfddm=T, use avs for salinity or for passive tracers |
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[3] | 81 | !! Surface and bottom boundary conditions: no diffusive flux on |
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| 82 | !! both tracers (bottom, applied through the masked field avt). |
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[2602] | 83 | !! If iso-neutral mixing, add to avt the contribution due to lateral mixing. |
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[3] | 84 | !! |
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[2602] | 85 | !! ** Action : - pta becomes the after tracer |
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[3] | 86 | !!--------------------------------------------------------------------- |
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[3432] | 87 | USE timing, ONLY: timing_start, timing_stop |
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[2715] | 88 | USE wrk_nemo, ONLY: wrk_in_use, wrk_not_released |
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| 89 | USE oce , ONLY: zwd => ua , zws => va ! (ua,va) used as 3D workspace |
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| 90 | USE wrk_nemo, ONLY: zwi => wrk_3d_6 , zwt => wrk_3d_7 ! 3D workspace |
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[3211] | 91 | |
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| 92 | !! DCSE_NEMO: Need additional directives for renamed module variables |
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| 93 | !FTRANS zwd zws :I :I :z |
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| 94 | !FTRANS zwi zwt :I :I :z |
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[2715] | 95 | ! |
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[2528] | 96 | INTEGER , INTENT(in ) :: kt ! ocean time-step index |
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| 97 | CHARACTER(len=3) , INTENT(in ) :: cdtype ! =TRA or TRC (tracer indicator) |
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| 98 | INTEGER , INTENT(in ) :: kjpt ! number of tracers |
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[4409] | 99 | REAL(wp), DIMENSION( jpkorig ), INTENT(in ) :: p2dt ! vertical profile of tracer time-step |
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[3211] | 100 | |
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| 101 | !! DCSE_NEMO: This style defeats ftrans |
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| 102 | ! REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(in ) :: ptb ! before and now tracer fields |
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| 103 | ! REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(inout) :: pta ! tracer trend |
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| 104 | |
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| 105 | !FTRANS ptb pta :I :I :z : |
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[4409] | 106 | REAL(wp), INTENT(in ) :: ptb(jpi,jpj,jpkorig,kjpt) ! before and now tracer fields |
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| 107 | REAL(wp), INTENT(inout) :: pta(jpi,jpj,jpkorig,kjpt) ! tracer trend |
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[2715] | 108 | ! |
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| 109 | INTEGER :: ji, jj, jk, jn ! dummy loop indices |
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| 110 | REAL(wp) :: zrhs, ze3tb, ze3tn, ze3ta ! local scalars |
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[3] | 111 | !!--------------------------------------------------------------------- |
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| 112 | |
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[3432] | 113 | CALL timing_start('tra_zdf_imp') |
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| 114 | |
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[2715] | 115 | IF( wrk_in_use(3, 6,7) ) THEN |
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| 116 | CALL ctl_stop('tra_zdf_imp : requested workspace arrays unavailable.') ; RETURN |
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| 117 | ENDIF |
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| 118 | |
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[2528] | 119 | IF( kt == nit000 ) THEN |
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[457] | 120 | IF(lwp)WRITE(numout,*) |
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[2528] | 121 | IF(lwp)WRITE(numout,*) 'tra_zdf_imp : implicit vertical mixing on ', cdtype |
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[457] | 122 | IF(lwp)WRITE(numout,*) '~~~~~~~~~~~ ' |
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[2602] | 123 | ! |
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| 124 | IF( lk_vvl ) THEN ; r_vvl = 1._wp ! Variable volume indicator |
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| 125 | ELSE ; r_vvl = 0._wp |
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| 126 | ENDIF |
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[457] | 127 | ENDIF |
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[2528] | 128 | ! |
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[2602] | 129 | ! ! ============= ! |
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| 130 | DO jn = 1, kjpt ! tracer loop ! |
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| 131 | ! ! ============= ! |
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[2528] | 132 | ! |
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| 133 | ! Matrix construction |
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[2602] | 134 | ! -------------------- |
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| 135 | ! Build matrix if temperature or salinity (only in double diffusion case) or first passive tracer |
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| 136 | ! |
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[2715] | 137 | IF( ( cdtype == 'TRA' .AND. ( jn == jp_tem .OR. ( jn == jp_sal .AND. lk_zdfddm ) ) ) .OR. & |
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[2602] | 138 | & ( cdtype == 'TRC' .AND. jn == 1 ) ) THEN |
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| 139 | ! |
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| 140 | ! vertical mixing coef.: avt for temperature, avs for salinity and passive tracers |
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[3211] | 141 | #if defined key_z_first |
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| 142 | IF( cdtype == 'TRA' .AND. jn == jp_tem ) THEN |
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| 143 | DO jj = 1, jpj |
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| 144 | DO ji = 1, jpi |
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| 145 | zwt(ji,jj,1) = 0._wp |
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[4428] | 146 | DO jk = 2, mbkmax(ji,jj) ! jpk |
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[3211] | 147 | zwt(ji,jj,jk) = avt (ji,jj,jk) |
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| 148 | END DO |
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| 149 | END DO |
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| 150 | END DO |
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| 151 | ELSE |
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| 152 | DO jj = 1, jpj |
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| 153 | DO ji = 1, jpi |
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| 154 | zwt(ji,jj,1) = 0._wp |
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[4428] | 155 | DO jk = 2, mbkmax(ji,jj) ! jpk |
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[3211] | 156 | zwt(ji,jj,jk) = fsavs(ji,jj,jk) |
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| 157 | END DO |
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| 158 | END DO |
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| 159 | END DO |
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| 160 | ENDIF |
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| 161 | #else |
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[2602] | 162 | IF( cdtype == 'TRA' .AND. jn == jp_tem ) THEN ; zwt(:,:,2:jpk) = avt (:,:,2:jpk) |
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| 163 | ELSE ; zwt(:,:,2:jpk) = fsavs(:,:,2:jpk) |
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[2528] | 164 | ENDIF |
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[2602] | 165 | zwt(:,:,1) = 0._wp |
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[3211] | 166 | #endif |
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[2528] | 167 | ! |
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| 168 | #if defined key_ldfslp |
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[2602] | 169 | ! isoneutral diffusion: add the contribution |
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| 170 | IF( ln_traldf_grif ) THEN ! Griffies isoneutral diff |
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[3211] | 171 | #if defined key_z_first |
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| 172 | DO jj = 2, jpjm1 |
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| 173 | DO ji = 2, jpim1 |
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[4428] | 174 | DO jk = 2, mbkmax(ji,jj)-1 ! jpkm1 |
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[3211] | 175 | #else |
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[2528] | 176 | DO jk = 2, jpkm1 |
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| 177 | DO jj = 2, jpjm1 |
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| 178 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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[3211] | 179 | #endif |
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[2602] | 180 | zwt(ji,jj,jk) = zwt(ji,jj,jk) + ah_wslp2(ji,jj,jk) |
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[2528] | 181 | END DO |
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| 182 | END DO |
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| 183 | END DO |
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[2602] | 184 | ELSE IF( l_traldf_rot ) THEN ! standard isoneutral diff |
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[3211] | 185 | #if defined key_z_first |
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| 186 | DO jj = 2, jpjm1 |
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| 187 | DO ji = 2, jpim1 |
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[4428] | 188 | DO jk = 2, mbkmax(ji,jj)-1 ! jpkm1 |
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[3211] | 189 | #else |
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[2528] | 190 | DO jk = 2, jpkm1 |
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| 191 | DO jj = 2, jpjm1 |
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| 192 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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[3211] | 193 | #endif |
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[2602] | 194 | zwt(ji,jj,jk) = zwt(ji,jj,jk) + fsahtw(ji,jj,jk) & |
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| 195 | & * ( wslpi(ji,jj,jk) * wslpi(ji,jj,jk) & |
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| 196 | & + wslpj(ji,jj,jk) * wslpj(ji,jj,jk) ) |
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[2528] | 197 | END DO |
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| 198 | END DO |
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| 199 | END DO |
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| 200 | ENDIF |
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[592] | 201 | #endif |
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[2602] | 202 | ! Diagonal, lower (i), upper (s) (including the bottom boundary condition since avt is masked) |
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[3211] | 203 | #if defined key_z_first |
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| 204 | DO jj = 2, jpjm1 |
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| 205 | DO ji = 2, jpim1 |
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[4428] | 206 | DO jk = 1, mbkmax(ji,jj) ! jpkm1 |
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[3432] | 207 | ! after scale factor at T-point |
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| 208 | ze3ta = ( 1. - r_vvl ) + r_vvl * fse3t_a(ji,jj,jk) |
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| 209 | ! now scale factor at T-point |
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| 210 | ze3tn = r_vvl + ( 1. - r_vvl ) * fse3t_n(ji,jj,jk) |
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[3211] | 211 | zwi(ji,jj,jk) = - p2dt(jk) * zwt(ji,jj,jk ) / ( ze3tn * fse3w(ji,jj,jk ) ) |
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| 212 | zws(ji,jj,jk) = - p2dt(jk) * zwt(ji,jj,jk+1) / ( ze3tn * fse3w(ji,jj,jk+1) ) |
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| 213 | zwd(ji,jj,jk) = ze3ta - zwi(ji,jj,jk) - zws(ji,jj,jk) |
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| 214 | END DO |
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| 215 | #else |
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[2528] | 216 | DO jk = 1, jpkm1 |
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| 217 | DO jj = 2, jpjm1 |
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| 218 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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[2602] | 219 | ze3ta = ( 1. - r_vvl ) + r_vvl * fse3t_a(ji,jj,jk) ! after scale factor at T-point |
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| 220 | ze3tn = r_vvl + ( 1. - r_vvl ) * fse3t_n(ji,jj,jk) ! now scale factor at T-point |
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[2528] | 221 | zwi(ji,jj,jk) = - p2dt(jk) * zwt(ji,jj,jk ) / ( ze3tn * fse3w(ji,jj,jk ) ) |
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| 222 | zws(ji,jj,jk) = - p2dt(jk) * zwt(ji,jj,jk+1) / ( ze3tn * fse3w(ji,jj,jk+1) ) |
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| 223 | zwd(ji,jj,jk) = ze3ta - zwi(ji,jj,jk) - zws(ji,jj,jk) |
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| 224 | END DO |
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| 225 | END DO |
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[3] | 226 | END DO |
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[3211] | 227 | #endif |
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[2528] | 228 | ! |
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[2602] | 229 | !! Matrix inversion from the first level |
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| 230 | !!---------------------------------------------------------------------- |
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| 231 | ! solve m.x = y where m is a tri diagonal matrix ( jpk*jpk ) |
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| 232 | ! |
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| 233 | ! ( zwd1 zws1 0 0 0 )( zwx1 ) ( zwy1 ) |
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| 234 | ! ( zwi2 zwd2 zws2 0 0 )( zwx2 ) ( zwy2 ) |
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| 235 | ! ( 0 zwi3 zwd3 zws3 0 )( zwx3 )=( zwy3 ) |
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| 236 | ! ( ... )( ... ) ( ... ) |
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| 237 | ! ( 0 0 0 zwik zwdk )( zwxk ) ( zwyk ) |
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| 238 | ! |
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| 239 | ! m is decomposed in the product of an upper and lower triangular matrix. |
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| 240 | ! The 3 diagonal terms are in 3d arrays: zwd, zws, zwi. |
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| 241 | ! Suffices i,s and d indicate "inferior" (below diagonal), diagonal |
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| 242 | ! and "superior" (above diagonal) components of the tridiagonal system. |
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| 243 | ! The solution will be in the 4d array pta. |
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| 244 | ! The 3d array zwt is used as a work space array. |
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| 245 | ! En route to the solution pta is used a to evaluate the rhs and then |
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| 246 | ! used as a work space array: its value is modified. |
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| 247 | ! |
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[2528] | 248 | ! first recurrence: Tk = Dk - Ik Sk-1 / Tk-1 (increasing k) |
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[2602] | 249 | ! done once for all passive tracers (so included in the IF instruction) |
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[3211] | 250 | #if defined key_z_first |
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| 251 | zwt(ji,jj,1) = zwd(ji,jj,1) |
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[4428] | 252 | DO jk = 2, mbkmax(ji,jj)-1 ! jpkm1 |
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[3211] | 253 | zwt(ji,jj,jk) = zwd(ji,jj,jk) - zwi(ji,jj,jk) * zws(ji,jj,jk-1) / zwt(ji,jj,jk-1) |
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| 254 | END DO |
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| 255 | END DO |
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| 256 | END DO |
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| 257 | #else |
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[2528] | 258 | DO jj = 2, jpjm1 |
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| 259 | DO ji = fs_2, fs_jpim1 |
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| 260 | zwt(ji,jj,1) = zwd(ji,jj,1) |
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| 261 | END DO |
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[457] | 262 | END DO |
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[2528] | 263 | DO jk = 2, jpkm1 |
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| 264 | DO jj = 2, jpjm1 |
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| 265 | DO ji = fs_2, fs_jpim1 |
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| 266 | zwt(ji,jj,jk) = zwd(ji,jj,jk) - zwi(ji,jj,jk) * zws(ji,jj,jk-1) / zwt(ji,jj,jk-1) |
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| 267 | END DO |
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| 268 | END DO |
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| 269 | END DO |
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[3211] | 270 | #endif |
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[2528] | 271 | ! |
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| 272 | END IF |
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[2602] | 273 | ! |
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[2528] | 274 | ! second recurrence: Zk = Yk - Ik / Tk-1 Zk-1 |
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[3211] | 275 | #if defined key_z_first |
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[457] | 276 | DO jj = 2, jpjm1 |
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[3211] | 277 | DO ji = 2, jpim1 |
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| 278 | ze3tb = ( 1. - r_vvl ) + r_vvl * fse3t_b(ji,jj,1) |
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| 279 | ze3tn = ( 1. - r_vvl ) + r_vvl * fse3t(ji,jj,1) |
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| 280 | pta(ji,jj,1,jn) = ze3tb * ptb(ji,jj,1,jn) + p2dt(1) * ze3tn * pta(ji,jj,1,jn) |
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[4428] | 281 | DO jk = 2, mbkmax(ji,jj)-1 ! jpkm1 |
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[3211] | 282 | ze3tb = ( 1. - r_vvl ) + r_vvl * fse3t_b(ji,jj,jk) |
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| 283 | ze3tn = ( 1. - r_vvl ) + r_vvl * fse3t (ji,jj,jk) |
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| 284 | zrhs = ze3tb * ptb(ji,jj,jk,jn) + p2dt(jk) * ze3tn * pta(ji,jj,jk,jn) ! zrhs=right hand side |
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| 285 | pta(ji,jj,jk,jn) = zrhs - zwi(ji,jj,jk) / zwt(ji,jj,jk-1) * pta(ji,jj,jk-1,jn) |
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| 286 | END DO |
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| 287 | #else |
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| 288 | DO jj = 2, jpjm1 |
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[457] | 289 | DO ji = fs_2, fs_jpim1 |
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[2602] | 290 | ze3tb = ( 1. - r_vvl ) + r_vvl * fse3t_b(ji,jj,1) |
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| 291 | ze3tn = ( 1. - r_vvl ) + r_vvl * fse3t(ji,jj,1) |
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[2528] | 292 | pta(ji,jj,1,jn) = ze3tb * ptb(ji,jj,1,jn) + p2dt(1) * ze3tn * pta(ji,jj,1,jn) |
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[457] | 293 | END DO |
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| 294 | END DO |
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[2528] | 295 | DO jk = 2, jpkm1 |
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| 296 | DO jj = 2, jpjm1 |
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| 297 | DO ji = fs_2, fs_jpim1 |
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[2602] | 298 | ze3tb = ( 1. - r_vvl ) + r_vvl * fse3t_b(ji,jj,jk) |
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| 299 | ze3tn = ( 1. - r_vvl ) + r_vvl * fse3t (ji,jj,jk) |
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[2528] | 300 | zrhs = ze3tb * ptb(ji,jj,jk,jn) + p2dt(jk) * ze3tn * pta(ji,jj,jk,jn) ! zrhs=right hand side |
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| 301 | pta(ji,jj,jk,jn) = zrhs - zwi(ji,jj,jk) / zwt(ji,jj,jk-1) * pta(ji,jj,jk-1,jn) |
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| 302 | END DO |
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[3] | 303 | END DO |
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| 304 | END DO |
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[3211] | 305 | #endif |
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[457] | 306 | |
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[2602] | 307 | ! third recurrence: Xk = (Zk - Sk Xk+1 ) / Tk (result is the after tracer) |
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[3211] | 308 | #if defined key_z_first |
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| 309 | pta(ji,jj,jpkm1,jn) = pta(ji,jj,jpkm1,jn) / zwt(ji,jj,jpkm1) * tmask(ji,jj,jpkm1) |
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[4428] | 310 | DO jk = mbkmax(ji,jj)-2, 1, -1 ! jpk-2 |
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[3211] | 311 | pta(ji,jj,jk,jn) = ( pta(ji,jj,jk,jn) - zws(ji,jj,jk) * pta(ji,jj,jk+1,jn) ) & |
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| 312 | & / zwt(ji,jj,jk) * tmask(ji,jj,jk) |
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| 313 | END DO |
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| 314 | END DO |
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| 315 | END DO |
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| 316 | #else |
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[457] | 317 | DO jj = 2, jpjm1 |
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| 318 | DO ji = fs_2, fs_jpim1 |
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[2528] | 319 | pta(ji,jj,jpkm1,jn) = pta(ji,jj,jpkm1,jn) / zwt(ji,jj,jpkm1) * tmask(ji,jj,jpkm1) |
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[3] | 320 | END DO |
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| 321 | END DO |
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[2528] | 322 | DO jk = jpk-2, 1, -1 |
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| 323 | DO jj = 2, jpjm1 |
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| 324 | DO ji = fs_2, fs_jpim1 |
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| 325 | pta(ji,jj,jk,jn) = ( pta(ji,jj,jk,jn) - zws(ji,jj,jk) * pta(ji,jj,jk+1,jn) ) & |
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| 326 | & / zwt(ji,jj,jk) * tmask(ji,jj,jk) |
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| 327 | END DO |
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[457] | 328 | END DO |
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| 329 | END DO |
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[3211] | 330 | #endif |
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[2602] | 331 | ! ! ================= ! |
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| 332 | END DO ! end tracer loop ! |
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| 333 | ! ! ================= ! |
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[1438] | 334 | ! |
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[2715] | 335 | IF( wrk_not_released(3, 6,7) ) CALL ctl_stop('tra_zdf_imp: failed to release workspace arrays') |
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| 336 | ! |
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[3432] | 337 | CALL timing_stop('tra_zdf_imp','section') |
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| 338 | ! |
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[3] | 339 | END SUBROUTINE tra_zdf_imp |
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| 340 | |
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| 341 | !!============================================================================== |
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| 342 | END MODULE trazdf_imp |
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