[186] | 1 | MODULE trcnxt |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE trcnxt *** |
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| 4 | !! Ocean passive tracers: time stepping on passives tracers |
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| 5 | !!====================================================================== |
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| 6 | #if defined key_passivetrc |
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| 7 | !!---------------------------------------------------------------------- |
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| 8 | !! trc_nxt : time stepping on passive tracers |
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| 9 | !!---------------------------------------------------------------------- |
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| 10 | !! * Modules used |
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| 11 | USE oce_trc ! ocean dynamics and tracers variables |
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[202] | 12 | USE trc ! ocean passive tracers variables |
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[186] | 13 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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[202] | 14 | USE trctrp_lec ! pasive tracers transport |
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[334] | 15 | USE prtctl_trc ! Print control for debbuging |
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[186] | 16 | |
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| 17 | IMPLICIT NONE |
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| 18 | PRIVATE |
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| 19 | |
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| 20 | !! * Routine accessibility |
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| 21 | PUBLIC trc_nxt ! routine called by step.F90 |
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| 22 | !!---------------------------------------------------------------------- |
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[349] | 23 | !! TOP 1.0 , LOCEAN-IPSL (2005) |
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[342] | 24 | !! $Header$ |
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| 25 | !! This software is governed by the CeCILL licence see modipsl/doc/NEMO_CeCILL.txt |
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[186] | 26 | !!---------------------------------------------------------------------- |
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| 27 | |
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| 28 | CONTAINS |
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| 29 | |
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| 30 | SUBROUTINE trc_nxt( kt ) |
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| 31 | !!---------------------------------------------------------------------- |
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| 32 | !! *** ROUTINE trcnxt *** |
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| 33 | !! |
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| 34 | !! ** Purpose : Compute the passive tracers fields at the |
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| 35 | !! next time-step from their temporal trends and swap the fields. |
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| 36 | !! |
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| 37 | !! ** Method : Apply lateral boundary conditions on (ua,va) through |
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| 38 | !! call to lbc_lnk routine |
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| 39 | !! default: |
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| 40 | !! arrays swap |
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| 41 | !! (trn) = (tra) ; (tra) = (0,0) |
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| 42 | !! (trb) = (trn) |
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| 43 | !! |
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| 44 | !! For Arakawa or TVD Scheme : |
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| 45 | !! A Asselin time filter applied on now tracers (trn) to avoid |
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| 46 | !! the divergence of two consecutive time-steps and tr arrays |
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| 47 | !! to prepare the next time_step: |
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| 48 | !! (trb) = (trn) + atfp [ (trb) + (tra) - 2 (trn) ] |
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| 49 | !! (trn) = (tra) ; (tra) = (0,0) |
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| 50 | !! |
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| 51 | !! |
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| 52 | !! ** Action : - update trb, trn |
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| 53 | !! |
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| 54 | !! History : |
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| 55 | !! 7.0 ! 91-11 (G. Madec) Original code |
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| 56 | !! ! 93-03 (M. Guyon) symetrical conditions |
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| 57 | !! ! 95-02 (M. Levy) passive tracers |
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| 58 | !! ! 96-02 (G. Madec & M. Imbard) opa release 8.0 |
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| 59 | !! 8.0 ! 96-04 (A. Weaver) Euler forward step |
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| 60 | !! 8.2 ! 99-02 (G. Madec, N. Grima) semi-implicit pressure grad. |
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| 61 | !! 8.5 ! 02-08 (G. Madec) F90: Free form and module |
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| 62 | !! ! 02-11 (C. Talandier, A-M Treguier) Open boundaries |
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| 63 | !! 9.0 ! 04-03 (C. Ethe) passive tracers |
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| 64 | !!---------------------------------------------------------------------- |
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| 65 | !! * Arguments |
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| 66 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
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| 67 | !! * Local declarations |
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| 68 | INTEGER :: ji, jj, jk,jn ! dummy loop indices |
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[202] | 69 | REAL(wp) :: zfact, ztra ! temporary scalar |
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[334] | 70 | CHARACTER (len=22) :: charout |
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[186] | 71 | !!---------------------------------------------------------------------- |
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| 72 | |
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[261] | 73 | IF( kt == nittrc000 .AND. lwp ) THEN |
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[186] | 74 | WRITE(numout,*) |
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| 75 | WRITE(numout,*) 'trc_nxt : time stepping on passive tracers' |
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| 76 | ENDIF |
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| 77 | |
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| 78 | |
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| 79 | DO jn = 1, jptra |
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| 80 | |
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| 81 | ! 0. Lateral boundary conditions on tra (T-point, unchanged sign) |
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| 82 | ! ---------------------------------============ |
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| 83 | CALL lbc_lnk( tra(:,:,:,jn), 'T', 1. ) |
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| 84 | |
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| 85 | ! ! =============== |
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| 86 | DO jk = 1, jpk ! Horizontal slab |
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| 87 | ! ! =============== |
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| 88 | ! 1. Leap-frog scheme (only in explicit case, otherwise the |
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| 89 | ! ------------------- time stepping is already done in trczdf) |
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| 90 | IF( l_trczdf_exp .AND. ( ln_trcadv_cen2 .OR. ln_trcadv_tvd) ) THEN |
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| 91 | zfact = 2. * rdttra(jk) * FLOAT(ndttrc) |
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| 92 | IF( neuler == 0 .AND. kt == nittrc000 ) zfact = rdttra(jk) * FLOAT(ndttrc) |
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| 93 | tra(:,:,jk,jn) = ( trb(:,:,jk,jn) + zfact * tra(:,:,jk,jn) ) * tmask(:,:,jk) |
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| 94 | ENDIF |
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| 95 | |
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| 96 | END DO |
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| 97 | |
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| 98 | #if defined key_obc |
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[501] | 99 | CALL ctl_stop( ' Passive tracers and Open Boundary condition can not be used together ' & |
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| 100 | & ' Check in trc_nxt routine' ) |
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[186] | 101 | #endif |
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| 102 | |
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| 103 | DO jk = 1, jpk |
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| 104 | |
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| 105 | ! 2. Time filter and swap of arrays |
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| 106 | ! --------------------------------- |
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| 107 | IF ( ln_trcadv_cen2 .OR. ln_trcadv_tvd ) THEN |
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| 108 | |
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| 109 | IF( neuler == 0 .AND. kt == nittrc000 ) THEN |
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| 110 | DO jj = 1, jpj |
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| 111 | DO ji = 1, jpi |
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| 112 | trb(ji,jj,jk,jn) = trn(ji,jj,jk,jn) |
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| 113 | trn(ji,jj,jk,jn) = tra(ji,jj,jk,jn) |
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| 114 | tra(ji,jj,jk,jn) = 0. |
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| 115 | END DO |
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| 116 | END DO |
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| 117 | ELSE |
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| 118 | DO jj = 1, jpj |
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| 119 | DO ji = 1, jpi |
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| 120 | trb(ji,jj,jk,jn) = atfp * ( trb(ji,jj,jk,jn) + tra(ji,jj,jk,jn) ) + atfp1 * trn(ji,jj,jk,jn) |
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| 121 | trn(ji,jj,jk,jn) = tra(ji,jj,jk,jn) |
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| 122 | tra(ji,jj,jk,jn) = 0. |
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| 123 | END DO |
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| 124 | END DO |
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| 125 | ENDIF |
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| 126 | |
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| 127 | ELSE |
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| 128 | ! case of smolar scheme or muscl |
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| 129 | DO jj = 1, jpj |
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| 130 | DO ji = 1, jpi |
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| 131 | trb(ji,jj,jk,jn) = tra(ji,jj,jk,jn) |
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| 132 | trn(ji,jj,jk,jn) = tra(ji,jj,jk,jn) |
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| 133 | tra(ji,jj,jk,jn) = 0. |
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| 134 | END DO |
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| 135 | END DO |
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| 136 | |
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| 137 | ENDIF |
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| 138 | ! ! =============== |
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| 139 | END DO ! End of slab |
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| 140 | ! ! =============== |
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| 141 | END DO |
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| 142 | |
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[334] | 143 | IF(ln_ctl) THEN ! print mean trends (used for debugging) |
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| 144 | WRITE(charout, FMT="('nxt')") |
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| 145 | CALL prt_ctl_trc_info(charout) |
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| 146 | CALL prt_ctl_trc(tab4d=trn, mask=tmask, clinfo=ctrcnm) |
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| 147 | ENDIF |
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| 148 | |
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| 149 | |
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[186] | 150 | END SUBROUTINE trc_nxt |
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| 151 | |
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| 152 | #else |
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| 153 | !!---------------------------------------------------------------------- |
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| 154 | !! Default option Empty module |
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| 155 | !!---------------------------------------------------------------------- |
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| 156 | CONTAINS |
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| 157 | SUBROUTINE trc_nxt( kt ) |
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| 158 | INTEGER, INTENT(in) :: kt |
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| 159 | WRITE(*,*) 'trc_nxt: You should not have seen this print! error?', kt |
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| 160 | END SUBROUTINE trc_nxt |
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| 161 | #endif |
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| 162 | !!====================================================================== |
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| 163 | END MODULE trcnxt |
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