[3] | 1 | MODULE tranpc |
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| 2 | !!============================================================================== |
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| 3 | !! *** MODULE tranpc *** |
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[4990] | 4 | !! Ocean active tracers: non penetrative convective adjustment scheme |
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[3] | 5 | !!============================================================================== |
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[1537] | 6 | !! History : 1.0 ! 1990-09 (G. Madec) Original code |
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| 7 | !! ! 1996-01 (G. Madec) statement function for e3 |
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| 8 | !! NEMO 1.0 ! 2002-06 (G. Madec) free form F90 |
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| 9 | !! 3.0 ! 2008-06 (G. Madec) applied on ta, sa and called before tranxt in step.F90 |
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[2528] | 10 | !! 3.3 ! 2010-05 (C. Ethe, G. Madec) merge TRC-TRA |
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[4990] | 11 | !! 3.7 ! 2014-06 (L. Brodeau) new algorithm based on local Brunt-Vaisala freq. |
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[503] | 12 | !!---------------------------------------------------------------------- |
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[3] | 13 | |
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| 14 | !!---------------------------------------------------------------------- |
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[1537] | 15 | !! tra_npc : apply the non penetrative convection scheme |
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[3] | 16 | !!---------------------------------------------------------------------- |
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[4990] | 17 | USE oce ! ocean dynamics and active tracers |
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[3] | 18 | USE dom_oce ! ocean space and time domain |
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[4990] | 19 | USE phycst ! physical constants |
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[1537] | 20 | USE zdf_oce ! ocean vertical physics |
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[4990] | 21 | USE trd_oce ! ocean active tracer trends |
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[2715] | 22 | USE trdtra ! ocean active tracer trends |
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[4990] | 23 | USE eosbn2 ! equation of state (eos routine) |
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| 24 | ! |
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[3] | 25 | USE lbclnk ! lateral boundary conditions (or mpp link) |
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[216] | 26 | USE in_out_manager ! I/O manager |
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[2715] | 27 | USE lib_mpp ! MPP library |
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[3294] | 28 | USE wrk_nemo ! Memory Allocation |
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| 29 | USE timing ! Timing |
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[3] | 30 | |
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| 31 | IMPLICIT NONE |
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| 32 | PRIVATE |
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| 33 | |
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[4990] | 34 | PUBLIC tra_npc ! routine called by step.F90 |
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[3] | 35 | |
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| 36 | !! * Substitutions |
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| 37 | # include "domzgr_substitute.h90" |
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[4990] | 38 | # include "vectopt_loop_substitute.h90" |
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[3] | 39 | !!---------------------------------------------------------------------- |
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[4990] | 40 | !! NEMO/OPA 3.6 , NEMO Consortium (2014) |
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| 41 | !! $Id$ |
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[2528] | 42 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[3] | 43 | !!---------------------------------------------------------------------- |
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| 44 | CONTAINS |
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| 45 | |
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| 46 | SUBROUTINE tra_npc( kt ) |
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| 47 | !!---------------------------------------------------------------------- |
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| 48 | !! *** ROUTINE tranpc *** |
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| 49 | !! |
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[4990] | 50 | !! ** Purpose : Non-penetrative convective adjustment scheme. solve |
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[1111] | 51 | !! the static instability of the water column on after fields |
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[3] | 52 | !! while conserving heat and salt contents. |
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| 53 | !! |
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[4990] | 54 | !! ** Method : updated algorithm able to deal with non-linear equation of state |
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| 55 | !! (i.e. static stability computed locally) |
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[3] | 56 | !! |
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[1111] | 57 | !! ** Action : - (ta,sa) after the application od the npc scheme |
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[4990] | 58 | !! - send the associated trends for on-line diagnostics (l_trdtra=T) |
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[3] | 59 | !! |
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[4990] | 60 | !! References : Madec, et al., 1991, JPO, 21, 9, 1349-1371. |
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[503] | 61 | !!---------------------------------------------------------------------- |
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| 62 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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[2715] | 63 | ! |
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[503] | 64 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 65 | INTEGER :: inpcc ! number of statically instable water column |
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[4990] | 66 | INTEGER :: jiter, ikbot, ik, ikup, ikdown, ilayer, ikm ! local integers |
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| 67 | LOGICAL :: l_bottom_reached, l_column_treated |
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| 68 | REAL(wp) :: zta, zalfa, zsum_temp, zsum_alfa, zaw, zdz, zsum_z |
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| 69 | REAL(wp) :: zsa, zbeta, zsum_sali, zsum_beta, zbw, zrw, z1_r2dt |
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| 70 | REAL(wp), POINTER, DIMENSION(:) :: zvn2 ! vertical profile of N2 at 1 given point... |
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| 71 | REAL(wp), POINTER, DIMENSION(:,:) :: zvts ! vertical profile of T and S at 1 given point... |
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| 72 | REAL(wp), POINTER, DIMENSION(:,:) :: zvab ! vertical profile of alpha and beta |
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| 73 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zn2 ! N^2 |
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| 74 | REAL(wp), POINTER, DIMENSION(:,:,:,:) :: zab ! alpha and beta |
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| 75 | REAL(wp), POINTER, DIMENSION(:,:,:) :: ztrdt, ztrds ! 3D workspace |
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| 76 | ! |
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| 77 | !!LB debug: |
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| 78 | LOGICAL, PARAMETER :: l_LB_debug = .FALSE. |
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| 79 | INTEGER :: ilc1, jlc1, klc1, nncpu |
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| 80 | LOGICAL :: lp_monitor_point = .FALSE. |
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| 81 | !!LB debug. |
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[3] | 82 | !!---------------------------------------------------------------------- |
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[3294] | 83 | ! |
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| 84 | IF( nn_timing == 1 ) CALL timing_start('tra_npc') |
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| 85 | ! |
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[1537] | 86 | IF( MOD( kt, nn_npc ) == 0 ) THEN |
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[4990] | 87 | ! |
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| 88 | CALL wrk_alloc( jpi, jpj, jpk, zn2 ) ! N2 |
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| 89 | CALL wrk_alloc( jpi, jpj, jpk, 2, zab ) ! Alpha and Beta |
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| 90 | CALL wrk_alloc( jpk, 2, zvts, zvab ) ! 1D column vector at point ji,jj |
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| 91 | CALL wrk_alloc( jpk, zvn2 ) ! 1D column vector at point ji,jj |
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[3] | 92 | |
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[4990] | 93 | IF( l_trdtra ) THEN !* Save initial after fields |
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[3294] | 94 | CALL wrk_alloc( jpi, jpj, jpk, ztrdt, ztrds ) |
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[2715] | 95 | ztrdt(:,:,:) = tsa(:,:,:,jp_tem) |
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| 96 | ztrds(:,:,:) = tsa(:,:,:,jp_sal) |
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[216] | 97 | ENDIF |
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| 98 | |
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[4990] | 99 | !LB debug: |
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| 100 | IF( lwp .AND. l_LB_debug ) THEN |
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| 101 | WRITE(numout,*) |
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| 102 | WRITE(numout,*) 'LOLO: entering tra_npc, kt, narea =', kt, narea |
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| 103 | ENDIF |
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| 104 | !LBdebug: Monitoring of 1 column subject to convection... |
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| 105 | IF( l_LB_debug ) THEN |
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| 106 | ! Location of 1 known convection spot to follow what's happening in the water column |
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| 107 | ilc1 = 54 ; jlc1 = 15 ; ! Labrador ORCA1 4x4 cpus: |
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| 108 | nncpu = 15 ; ! the CPU domain contains the convection spot |
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| 109 | !ilc1 = 14 ; jlc1 = 13 ; ! Labrador ORCA1 8x8 cpus: |
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| 110 | !nncpu = 54 ; ! the CPU domain contains the convection spot |
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| 111 | klc1 = mbkt(ilc1,jlc1) ! bottom of the ocean for debug point... |
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| 112 | ENDIF |
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| 113 | !LBdebug. |
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[3] | 114 | |
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[4990] | 115 | CALL eos_rab( tsa, zab ) ! after alpha and beta |
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| 116 | CALL bn2 ( tsa, zab, zn2 ) ! after Brunt-Vaisala |
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| 117 | |
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| 118 | inpcc = 0 |
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[3] | 119 | |
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[4990] | 120 | DO jj = 2, jpjm1 ! interior column only |
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| 121 | DO ji = fs_2, fs_jpim1 |
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| 122 | ! |
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| 123 | IF( tmask(ji,jj,2) == 1 ) THEN ! At least 2 ocean points |
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| 124 | ! ! consider one ocean column |
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| 125 | zvts(:,jp_tem) = tsa(ji,jj,:,jp_tem) ! temperature |
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| 126 | zvts(:,jp_sal) = tsa(ji,jj,:,jp_sal) ! salinity |
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[3] | 127 | |
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[4990] | 128 | zvab(:,jp_tem) = zab(ji,jj,:,jp_tem) ! Alpha |
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| 129 | zvab(:,jp_sal) = zab(ji,jj,:,jp_sal) ! Beta |
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| 130 | zvn2(:) = zn2(ji,jj,:) ! N^2 |
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| 131 | |
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| 132 | IF( l_LB_debug ) THEN !LB debug: |
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| 133 | lp_monitor_point = .FALSE. |
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| 134 | IF( ( ji == ilc1 ).AND.( jj == jlc1 ) ) lp_monitor_point = .TRUE. |
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| 135 | ! writing only if on CPU domain where conv region is: |
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| 136 | lp_monitor_point = (narea == nncpu).AND.lp_monitor_point |
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| 137 | |
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| 138 | IF(lp_monitor_point) THEN |
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| 139 | WRITE(numout,*) '' ;WRITE(numout,*) '' ; |
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| 140 | WRITE(numout,'("Time step = ",i6.6," !!!")') kt |
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| 141 | WRITE(numout,'(" *** BEFORE anything, N^2 for point ",i3,",",i3,":" )') ji,jj |
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| 142 | DO jk = 1, klc1 |
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| 143 | WRITE(numout,*) jk, zvn2(jk) |
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| 144 | END DO |
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| 145 | WRITE(numout,*) ' ' |
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| 146 | ENDIF |
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| 147 | ENDIF !LB debug end |
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[3] | 148 | |
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[4990] | 149 | ikbot = mbkt(ji,jj) ! ikbot: ocean bottom T-level |
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| 150 | ik = 1 ! because N2 is irrelevant at the surface level (will start at ik=2) |
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| 151 | ilayer = 0 |
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| 152 | jiter = 0 |
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| 153 | l_column_treated = .FALSE. |
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| 154 | |
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| 155 | DO WHILE ( .NOT. l_column_treated ) |
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| 156 | ! |
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| 157 | jiter = jiter + 1 |
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| 158 | |
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| 159 | IF( jiter >= 400 ) EXIT |
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| 160 | |
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| 161 | l_bottom_reached = .FALSE. |
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[3] | 162 | |
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[4990] | 163 | DO WHILE ( .NOT. l_bottom_reached ) |
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[3] | 164 | |
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[4990] | 165 | ik = ik + 1 |
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| 166 | |
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| 167 | !! Checking level ik for instability |
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| 168 | !! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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[3] | 169 | |
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[4990] | 170 | IF( zvn2(ik) < 0. ) THEN ! Instability found! |
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[3] | 171 | |
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[4990] | 172 | ikm = ik ! first level whith negative N2 |
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| 173 | ilayer = ilayer + 1 ! yet another layer found.... |
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| 174 | IF(jiter == 1) inpcc = inpcc + 1 |
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[3] | 175 | |
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[4990] | 176 | IF(l_LB_debug .AND. lp_monitor_point) & |
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| 177 | & WRITE(numout,*) 'Negative N2 at ik =', ikm, ' layer nb.', ilayer, & |
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| 178 | & ' inpcc =', inpcc |
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| 179 | |
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| 180 | !! Case we mix with upper regions where N2==0: |
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| 181 | !! All the points above ikup where N2 == 0 must also be mixed => we go |
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| 182 | !! upward to find a new ikup, where the layer doesn't have N2==0 |
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| 183 | ikup = ikm |
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| 184 | DO jk = ikm, 2, -1 |
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| 185 | ikup = ikup - 1 |
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| 186 | IF( (zvn2(jk-1) > 0.).OR.(ikup == 1) ) EXIT |
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| 187 | END DO |
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| 188 | |
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| 189 | ! adjusting ikup if the upper part of the unstable column was neutral (N2=0) |
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| 190 | IF((zvn2(ikup+1) == 0.).AND.(ikup /= 1)) ikup = ikup+1 ; |
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| 191 | |
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| 192 | |
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| 193 | IF( lp_monitor_point ) WRITE(numout,*) ' => ikup is =', ikup, ' layer nb.', ilayer |
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| 194 | |
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| 195 | zsum_temp = 0._wp |
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| 196 | zsum_sali = 0._wp |
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| 197 | zsum_alfa = 0._wp |
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| 198 | zsum_beta = 0._wp |
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| 199 | zsum_z = 0._wp |
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| 200 | |
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| 201 | DO jk = ikup, ikbot+1 ! Inside the instable (and overlying neutral) portion of the column |
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| 202 | ! |
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| 203 | IF(l_LB_debug .AND. lp_monitor_point) WRITE(numout,*) ' -> summing for jk =', jk |
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| 204 | ! |
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| 205 | zdz = fse3t(ji,jj,jk) |
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| 206 | zsum_temp = zsum_temp + zvts(jk,jp_tem)*zdz |
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| 207 | zsum_sali = zsum_sali + zvts(jk,jp_sal)*zdz |
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| 208 | zsum_alfa = zsum_alfa + zvab(jk,jp_tem)*zdz |
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| 209 | zsum_beta = zsum_beta + zvab(jk,jp_sal)*zdz |
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| 210 | zsum_z = zsum_z + zdz |
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| 211 | ! |
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| 212 | !! EXIT if we found the bottom of the unstable portion of the water column |
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| 213 | IF( (zvn2(jk+1) > 0.).OR.(jk == ikbot ).OR.((jk==ikm).AND.(zvn2(jk+1) == 0.)) ) EXIT |
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| 214 | END DO |
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| 215 | |
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| 216 | !ik = jk !LB remove? |
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| 217 | ikdown = jk ! for the current unstable layer, ikdown is the deepest point with a negative N2 |
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| 218 | |
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| 219 | IF(l_LB_debug .AND. lp_monitor_point) & |
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| 220 | & WRITE(numout,*) ' => ikdown =', ikdown, ' layer nb.', ilayer |
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| 221 | |
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| 222 | ! Mixing Temperature and salinity between ikup and ikdown: |
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| 223 | zta = zsum_temp/zsum_z |
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| 224 | zsa = zsum_sali/zsum_z |
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| 225 | zalfa = zsum_alfa/zsum_z |
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| 226 | zbeta = zsum_beta/zsum_z |
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| 227 | |
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| 228 | IF(l_LB_debug .AND. lp_monitor_point) THEN |
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| 229 | WRITE(numout,*) ' => Mean temp. in that portion =', zta |
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| 230 | WRITE(numout,*) ' => Mean sali. in that portion =', zsa |
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| 231 | WRITE(numout,*) ' => Mean Alpha in that portion =', zalfa |
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| 232 | WRITE(numout,*) ' => Mean Beta in that portion =', zbeta |
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| 233 | ENDIF |
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| 234 | |
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| 235 | !! Homogenaizing the temperature, salinity, alpha and beta in this portion of the column |
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| 236 | DO jk = ikup, ikdown |
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| 237 | zvts(jk,jp_tem) = zta |
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| 238 | zvts(jk,jp_sal) = zsa |
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| 239 | zvab(jk,jp_tem) = zalfa |
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| 240 | zvab(jk,jp_sal) = zbeta |
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| 241 | END DO |
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| 242 | ! |
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| 243 | !! Before updating N2, it is possible that another unstable |
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| 244 | !! layer exists underneath the one we just homogeneized! |
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| 245 | ik = ikdown |
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| 246 | ! |
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| 247 | ENDIF ! IF( zvn2(ik+1) < 0. ) THEN |
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[503] | 248 | ! |
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[4990] | 249 | IF( ik == ikbot ) l_bottom_reached = .TRUE. |
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[503] | 250 | ! |
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[4990] | 251 | END DO ! DO WHILE ( .NOT. l_bottom_reached ) |
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| 252 | |
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| 253 | IF( ik /= ikbot ) STOP 'ERROR: tranpc.F90 => PROBLEM #1' |
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| 254 | |
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| 255 | ! ******* At this stage ik == ikbot ! ******* |
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| 256 | |
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| 257 | IF( ilayer > 0 ) THEN |
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| 258 | !! least an unstable layer has been found |
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| 259 | !! Temperature, Salinity, Alpha and Beta have been homogenized in the unstable portion |
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| 260 | !! => Need to re-compute N2! will use Alpha and Beta! |
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[503] | 261 | ! |
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[4990] | 262 | DO jk = ikup+1, ikdown+1 ! we must go 1 point deeper than ikdown! |
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| 263 | !! Doing exactly as in eosbn2.F90: |
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| 264 | !! * Except that we only are interested in the sign of N2 !!! |
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| 265 | !! => just considering the vertical gradient of density |
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| 266 | zrw = (fsdepw(ji,jj,jk ) - fsdept(ji,jj,jk)) & |
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| 267 | & / (fsdept(ji,jj,jk-1) - fsdept(ji,jj,jk)) |
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| 268 | zaw = zvab(jk,jp_tem) * (1._wp - zrw) + zvab(jk-1,jp_tem) * zrw |
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| 269 | zbw = zvab(jk,jp_sal) * (1._wp - zrw) + zvab(jk-1,jp_sal) * zrw |
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| 270 | |
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| 271 | !zvn2(jk) = grav*( zaw * ( zvts(jk-1,jp_tem) - zvts(jk,jp_tem) ) & |
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| 272 | ! & - zbw * ( zvts(jk-1,jp_sal) - zvts(jk,jp_sal) ) ) & |
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| 273 | ! & / fse3w(ji,jj,jk) * tmask(ji,jj,jk) |
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| 274 | zvn2(jk) = ( zaw * ( zvts(jk-1,jp_tem) - zvts(jk,jp_tem) ) & |
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| 275 | & - zbw * ( zvts(jk-1,jp_sal) - zvts(jk,jp_sal) ) ) |
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[3] | 276 | END DO |
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[4990] | 277 | |
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| 278 | IF(l_LB_debug .AND. lp_monitor_point) THEN |
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| 279 | WRITE(numout, '(" *** After iteration #",i3.3,", N^2 for point ",i3,",",i3,":" )') & |
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| 280 | & jiter, ji,jj |
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| 281 | DO jk = 1, klc1 |
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| 282 | WRITE(numout,*) jk, zvn2(jk) |
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| 283 | END DO |
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| 284 | WRITE(numout,*) ' ' |
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[3] | 285 | ENDIF |
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[4990] | 286 | |
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| 287 | ik = 1 ! starting again at the surface for the next iteration |
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| 288 | ilayer = 0 |
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| 289 | ENDIF |
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| 290 | ! |
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| 291 | IF( ik >= ikbot ) THEN |
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| 292 | IF(l_LB_debug .AND. lp_monitor_point) WRITE(numout,*) ' --- exiting jiter loop ---' |
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| 293 | l_column_treated = .TRUE. |
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| 294 | ENDIF |
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| 295 | ! |
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| 296 | END DO ! DO WHILE ( .NOT. l_column_treated ) |
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| 297 | |
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| 298 | !! Updating tsa: |
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| 299 | tsa(ji,jj,:,jp_tem) = zvts(:,jp_tem) |
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| 300 | tsa(ji,jj,:,jp_sal) = zvts(:,jp_sal) |
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| 301 | |
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| 302 | !! lolo: Should we update something else???? |
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| 303 | !! => like alpha and beta? |
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| 304 | |
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| 305 | IF(l_LB_debug .AND. lp_monitor_point) WRITE(numout,*) '' |
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| 306 | |
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| 307 | ENDIF ! IF( tmask(ji,jj,3) == 1 ) THEN |
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| 308 | |
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| 309 | END DO ! ji |
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| 310 | END DO ! jj |
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| 311 | ! |
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| 312 | IF( l_trdtra ) THEN ! send the Non penetrative mixing trends for diagnostic |
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| 313 | z1_r2dt = 1._wp / (2._wp * rdt) |
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| 314 | ztrdt(:,:,:) = ( tsa(:,:,:,jp_tem) - ztrdt(:,:,:) ) * z1_r2dt |
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| 315 | ztrds(:,:,:) = ( tsa(:,:,:,jp_sal) - ztrds(:,:,:) ) * z1_r2dt |
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| 316 | CALL trd_tra( kt, 'TRA', jp_tem, jptra_npc, ztrdt ) |
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| 317 | CALL trd_tra( kt, 'TRA', jp_sal, jptra_npc, ztrds ) |
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[3294] | 318 | CALL wrk_dealloc( jpi, jpj, jpk, ztrdt, ztrds ) |
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[216] | 319 | ENDIF |
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[4990] | 320 | ! |
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[2715] | 321 | CALL lbc_lnk( tsa(:,:,:,jp_tem), 'T', 1. ) ; CALL lbc_lnk( tsa(:,:,:,jp_sal), 'T', 1. ) |
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[4990] | 322 | ! |
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| 323 | IF(lwp) THEN |
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| 324 | WRITE(numout,*) 'LOLO: exiting tra_npc, kt =', kt |
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| 325 | WRITE(numout,*)' => number of statically instable water column : ',inpcc |
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| 326 | WRITE(numout,*) '' ; WRITE(numout,*) '' |
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[3] | 327 | ENDIF |
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[503] | 328 | ! |
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[4990] | 329 | CALL wrk_dealloc(jpi, jpj, jpk, zn2 ) |
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| 330 | CALL wrk_dealloc(jpi, jpj, jpk, 2, zab ) |
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| 331 | CALL wrk_dealloc(jpk, zvn2 ) |
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| 332 | CALL wrk_dealloc(jpk, 2, zvts, zvab ) |
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| 333 | ! |
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| 334 | ENDIF ! IF( MOD( kt, nn_npc ) == 0 ) THEN |
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[503] | 335 | ! |
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[3294] | 336 | IF( nn_timing == 1 ) CALL timing_stop('tra_npc') |
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| 337 | ! |
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[3] | 338 | END SUBROUTINE tra_npc |
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| 339 | |
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| 340 | !!====================================================================== |
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| 341 | END MODULE tranpc |
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