[3] | 1 | MODULE dynkeg |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE dynkeg *** |
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| 4 | !! Ocean dynamics: kinetic energy gradient trend |
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| 5 | !!====================================================================== |
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[503] | 6 | !! History : 1.0 ! 87-09 (P. Andrich, m.-a. Foujols) Original code |
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| 7 | !! 7.0 ! 97-05 (G. Madec) Split dynber into dynkeg and dynhpg |
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| 8 | !! 9.0 ! 02-07 (G. Madec) F90: Free form and module |
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| 9 | !!---------------------------------------------------------------------- |
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[3] | 10 | |
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| 11 | !!---------------------------------------------------------------------- |
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| 12 | !! dyn_keg : update the momentum trend with the horizontal tke |
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| 13 | !!---------------------------------------------------------------------- |
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| 14 | USE oce ! ocean dynamics and tracers |
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| 15 | USE dom_oce ! ocean space and time domain |
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[216] | 16 | USE trdmod ! ocean dynamics trends |
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| 17 | USE trdmod_oce ! ocean variables trends |
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[2715] | 18 | USE in_out_manager ! I/O manager |
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| 19 | USE lib_mpp ! MPP library |
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[258] | 20 | USE prtctl ! Print control |
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[3] | 21 | |
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| 22 | IMPLICIT NONE |
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| 23 | PRIVATE |
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| 24 | |
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[503] | 25 | PUBLIC dyn_keg ! routine called by step module |
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[3211] | 26 | |
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| 27 | !! * Control permutation of array indices |
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| 28 | # include "oce_ftrans.h90" |
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| 29 | # include "dom_oce_ftrans.h90" |
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[3] | 30 | |
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| 31 | !! * Substitutions |
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| 32 | # include "vectopt_loop_substitute.h90" |
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[503] | 33 | !!---------------------------------------------------------------------- |
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[2528] | 34 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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[1152] | 35 | !! $Id$ |
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[2715] | 36 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[503] | 37 | !!---------------------------------------------------------------------- |
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[3] | 38 | CONTAINS |
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| 39 | |
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| 40 | SUBROUTINE dyn_keg( kt ) |
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| 41 | !!---------------------------------------------------------------------- |
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| 42 | !! *** ROUTINE dyn_keg *** |
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| 43 | !! |
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| 44 | !! ** Purpose : Compute the now momentum trend due to the horizontal |
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| 45 | !! gradient of the horizontal kinetic energy and add it to the |
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| 46 | !! general momentum trend. |
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| 47 | !! |
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[503] | 48 | !! ** Method : Compute the now horizontal kinetic energy |
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[3] | 49 | !! zhke = 1/2 [ mi-1( un^2 ) + mj-1( vn^2 ) ] |
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| 50 | !! Take its horizontal gradient and add it to the general momentum |
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| 51 | !! trend (ua,va). |
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| 52 | !! ua = ua - 1/e1u di[ zhke ] |
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| 53 | !! va = va - 1/e2v dj[ zhke ] |
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| 54 | !! |
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| 55 | !! ** Action : - Update the (ua, va) with the hor. ke gradient trend |
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[503] | 56 | !! - save this trends (l_trddyn=T) for post-processing |
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| 57 | !!---------------------------------------------------------------------- |
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[2715] | 58 | USE wrk_nemo, ONLY: wrk_in_use, wrk_not_released |
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| 59 | USE oce , ONLY: ztrdu => ta , ztrdv => sa ! (ta,sa) used as 3D workspace |
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| 60 | USE wrk_nemo, ONLY: zhke => wrk_3d_1 ! 3D workspace |
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[3211] | 61 | !! DCSE_NEMO: need additional directives for renamed module variables |
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| 62 | !FTRANS ztrdu ztrdv zhke :I :I :z |
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| 63 | |
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[3] | 64 | !! |
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[503] | 65 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
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| 66 | !! |
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| 67 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 68 | REAL(wp) :: zu, zv ! temporary scalars |
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[3] | 69 | !!---------------------------------------------------------------------- |
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| 70 | |
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[2715] | 71 | IF( wrk_in_use(3,1) ) THEN |
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[3432] | 72 | CALL ctl_stop('dyn_keg: requested workspace array is unavailable') ; RETURN |
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[2715] | 73 | ENDIF |
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| 74 | |
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[3] | 75 | IF( kt == nit000 ) THEN |
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| 76 | IF(lwp) WRITE(numout,*) |
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| 77 | IF(lwp) WRITE(numout,*) 'dyn_keg : kinetic energy gradient trend' |
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| 78 | IF(lwp) WRITE(numout,*) '~~~~~~~' |
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| 79 | ENDIF |
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[216] | 80 | |
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[503] | 81 | IF( l_trddyn ) THEN ! Save ua and va trends |
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| 82 | ztrdu(:,:,:) = ua(:,:,:) |
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| 83 | ztrdv(:,:,:) = va(:,:,:) |
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[216] | 84 | ENDIF |
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[3] | 85 | |
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[3211] | 86 | #if defined key_z_first |
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| 87 | DO jj = 2, jpj ! Horizontal kinetic energy at T-point |
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| 88 | DO ji = 2, jpi |
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| 89 | DO jk = 1, jpkm1 |
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| 90 | zhke(ji,jj,jk) = 0.25 * ( un(ji-1,jj ,jk) * un(ji-1,jj ,jk) & |
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| 91 | & + un(ji ,jj ,jk) * un(ji ,jj ,jk) & |
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| 92 | + vn(ji ,jj-1,jk) * vn(ji ,jj-1,jk) & |
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| 93 | & + vn(ji ,jj ,jk) * vn(ji ,jj ,jk) ) |
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| 94 | END DO |
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| 95 | END DO |
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| 96 | END DO |
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| 97 | DO jj = 2, jpjm1 ! add the gradient of kinetic energy to the general momentum trends |
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| 98 | DO ji = 2, jpim1 |
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| 99 | DO jk = 1, jpkm1 |
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| 100 | ua(ji,jj,jk) = ua(ji,jj,jk) - ( zhke(ji+1,jj ,jk) - zhke(ji,jj,jk) ) / e1u(ji,jj) |
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| 101 | va(ji,jj,jk) = va(ji,jj,jk) - ( zhke(ji ,jj+1,jk) - zhke(ji,jj,jk) ) / e2v(ji,jj) |
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| 102 | END DO |
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| 103 | END DO |
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| 104 | END DO |
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| 105 | #else |
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[3] | 106 | ! ! =============== |
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| 107 | DO jk = 1, jpkm1 ! Horizontal slab |
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| 108 | ! ! =============== |
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[503] | 109 | DO jj = 2, jpj ! Horizontal kinetic energy at T-point |
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[3] | 110 | DO ji = fs_2, jpi ! vector opt. |
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[503] | 111 | zu = 0.25 * ( un(ji-1,jj ,jk) * un(ji-1,jj ,jk) & |
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| 112 | & + un(ji ,jj ,jk) * un(ji ,jj ,jk) ) |
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[3] | 113 | zv = 0.25 * ( vn(ji ,jj-1,jk) * vn(ji ,jj-1,jk) & |
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[503] | 114 | & + vn(ji ,jj ,jk) * vn(ji ,jj ,jk) ) |
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[3] | 115 | zhke(ji,jj,jk) = zv + zu |
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[2715] | 116 | !!gm simplier coding ==>> ~ faster |
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| 117 | ! don't forget to suppress local zu zv scalars |
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| 118 | ! zhke(ji,jj,jk) = 0.25 * ( un(ji-1,jj ,jk) * un(ji-1,jj ,jk) & |
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| 119 | ! & + un(ji ,jj ,jk) * un(ji ,jj ,jk) & |
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| 120 | ! & + vn(ji ,jj-1,jk) * vn(ji ,jj-1,jk) & |
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| 121 | ! & + vn(ji ,jj ,jk) * vn(ji ,jj ,jk) ) |
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| 122 | !!gm end <<== |
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[3] | 123 | END DO |
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| 124 | END DO |
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[503] | 125 | DO jj = 2, jpjm1 ! add the gradient of kinetic energy to the general momentum trends |
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[3] | 126 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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[503] | 127 | ua(ji,jj,jk) = ua(ji,jj,jk) - ( zhke(ji+1,jj ,jk) - zhke(ji,jj,jk) ) / e1u(ji,jj) |
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| 128 | va(ji,jj,jk) = va(ji,jj,jk) - ( zhke(ji ,jj+1,jk) - zhke(ji,jj,jk) ) / e2v(ji,jj) |
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[3] | 129 | END DO |
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| 130 | END DO |
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[2715] | 131 | !!gm idea to be tested ==>> is it faster on scalar computers ? |
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| 132 | ! DO jj = 2, jpjm1 ! add the gradient of kinetic energy to the general momentum trends |
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| 133 | ! DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 134 | ! ua(ji,jj,jk) = ua(ji,jj,jk) - 0.25 * ( + un(ji+1,jj ,jk) * un(ji+1,jj ,jk) & |
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| 135 | ! & + vn(ji+1,jj-1,jk) * vn(ji+1,jj-1,jk) & |
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| 136 | ! & + vn(ji+1,jj ,jk) * vn(ji+1,jj ,jk) & |
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| 137 | ! ! |
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| 138 | ! & - un(ji-1,jj ,jk) * un(ji-1,jj ,jk) & |
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| 139 | ! & - vn(ji ,jj-1,jk) * vn(ji ,jj-1,jk) & |
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| 140 | ! & - vn(ji ,jj ,jk) * vn(ji ,jj ,jk) ) / e1u(ji,jj) |
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| 141 | ! ! |
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| 142 | ! va(ji,jj,jk) = va(ji,jj,jk) - 0.25 * ( un(ji-1,jj+1,jk) * un(ji-1,jj+1,jk) & |
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| 143 | ! & + un(ji ,jj+1,jk) * un(ji ,jj+1,jk) & |
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| 144 | ! & + vn(ji ,jj+1,jk) * vn(ji ,jj+1,jk) & |
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| 145 | ! ! |
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| 146 | ! & - un(ji-1,jj ,jk) * un(ji-1,jj ,jk) & |
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| 147 | ! & - un(ji ,jj ,jk) * un(ji ,jj ,jk) & |
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| 148 | ! & - vn(ji ,jj ,jk) * vn(ji ,jj ,jk) ) / e2v(ji,jj) |
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| 149 | ! END DO |
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| 150 | ! END DO |
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| 151 | !!gm en idea <<== |
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[3] | 152 | ! ! =============== |
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| 153 | END DO ! End of slab |
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| 154 | ! ! =============== |
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[3211] | 155 | #endif |
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[3] | 156 | |
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[503] | 157 | IF( l_trddyn ) THEN ! save the Kinetic Energy trends for diagnostic |
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| 158 | ztrdu(:,:,:) = ua(:,:,:) - ztrdu(:,:,:) |
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| 159 | ztrdv(:,:,:) = va(:,:,:) - ztrdv(:,:,:) |
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| 160 | CALL trd_mod( ztrdu, ztrdv, jpdyn_trd_keg, 'DYN', kt ) |
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[216] | 161 | ENDIF |
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[503] | 162 | ! |
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| 163 | IF(ln_ctl) CALL prt_ctl( tab3d_1=ua, clinfo1=' keg - Ua: ', mask1=umask, & |
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| 164 | & tab3d_2=va, clinfo2= ' Va: ', mask2=vmask, clinfo3='dyn' ) |
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| 165 | ! |
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[3432] | 166 | IF( wrk_not_released(3, 1) ) CALL ctl_stop('dyn_keg: failed to release workspace array') |
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[2715] | 167 | ! |
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[3] | 168 | END SUBROUTINE dyn_keg |
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| 169 | |
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| 170 | !!====================================================================== |
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| 171 | END MODULE dynkeg |
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