[3] | 1 | MODULE zdfevd |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE zdfevd *** |
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| 4 | !! Ocean physics: parameterization of convection through an enhancement |
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| 5 | !! of vertical eddy mixing coefficient |
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| 6 | !!====================================================================== |
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[1438] | 7 | !! History : OPA ! 1997-06 (G. Madec, A. Lazar) Original code |
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| 8 | !! NEMO 1.0 ! 2002-06 (G. Madec) F90: Free form and module |
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| 9 | !! 3.2 ! 2009-03 (M. Leclair, G. Madec, R. Benshila) test on both before & after |
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[9019] | 10 | !! 4.0 ! 2017-04 (G. Madec) evd applied on avm (at t-point) |
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[1438] | 11 | !!---------------------------------------------------------------------- |
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[3] | 12 | |
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| 13 | !!---------------------------------------------------------------------- |
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[5836] | 14 | !! zdf_evd : increase the momentum and tracer Kz at the location of |
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| 15 | !! statically unstable portion of the water column (ln_zdfevd=T) |
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[3] | 16 | !!---------------------------------------------------------------------- |
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| 17 | USE oce ! ocean dynamics and tracers variables |
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| 18 | USE dom_oce ! ocean space and time domain variables |
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| 19 | USE zdf_oce ! ocean vertical physics variables |
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[7646] | 20 | USE trd_oce ! trends: ocean variables |
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| 21 | USE trdtra ! trends manager: tracers |
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[5836] | 22 | ! |
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[3] | 23 | USE in_out_manager ! I/O manager |
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[1482] | 24 | USE iom ! for iom_put |
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[3] | 25 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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[3294] | 26 | USE timing ! Timing |
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[3] | 27 | |
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| 28 | IMPLICIT NONE |
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| 29 | PRIVATE |
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| 30 | |
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[1438] | 31 | PUBLIC zdf_evd ! called by step.F90 |
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[3] | 32 | |
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[12377] | 33 | !! * Substitutions |
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| 34 | # include "do_loop_substitute.h90" |
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[3] | 35 | !!---------------------------------------------------------------------- |
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[9598] | 36 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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[1438] | 37 | !! $Id$ |
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[10068] | 38 | !! Software governed by the CeCILL license (see ./LICENSE) |
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[3] | 39 | !!---------------------------------------------------------------------- |
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| 40 | CONTAINS |
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| 41 | |
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[12377] | 42 | SUBROUTINE zdf_evd( kt, Kmm, Krhs, p_avm, p_avt ) |
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[3] | 43 | !!---------------------------------------------------------------------- |
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| 44 | !! *** ROUTINE zdf_evd *** |
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| 45 | !! |
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| 46 | !! ** Purpose : Local increased the vertical eddy viscosity and diffu- |
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| 47 | !! sivity coefficients when a static instability is encountered. |
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| 48 | !! |
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[9019] | 49 | !! ** Method : tracer (and momentum if nn_evdm=1) vertical mixing |
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| 50 | !! coefficients are set to rn_evd (namelist parameter) |
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| 51 | !! if the water column is statically unstable. |
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| 52 | !! The test of static instability is performed using |
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| 53 | !! Brunt-Vaisala frequency (rn2 < -1.e-12) of to successive |
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| 54 | !! time-step (Leap-Frog environnement): before and |
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| 55 | !! now time-step. |
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[3] | 56 | !! |
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[9019] | 57 | !! ** Action : avt, avm enhanced where static instability occurs |
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[3] | 58 | !!---------------------------------------------------------------------- |
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[9019] | 59 | INTEGER , INTENT(in ) :: kt ! ocean time-step indexocean time step |
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[12377] | 60 | INTEGER , INTENT(in ) :: Kmm, Krhs ! time level indices |
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[9019] | 61 | REAL(wp), DIMENSION(:,:,:) , INTENT(inout) :: p_avm, p_avt ! momentum and tracer Kz (w-points) |
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[2715] | 62 | ! |
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| 63 | INTEGER :: ji, jj, jk ! dummy loop indices |
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[14834] | 64 | ! NOTE: [tiling] use a SAVE array to store diagnostics, then send after all tiles are finished. This is necessary because p_avt/p_avm are modified on adjacent tiles when using nn_hls > 1. zavt_evd/zavm_evd are then zero on some points when subsequently calculated for these tiles. |
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| 65 | REAL(wp), SAVE, ALLOCATABLE, DIMENSION(:,:,:) :: zavt_evd, zavm_evd |
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[3] | 66 | !!---------------------------------------------------------------------- |
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[3294] | 67 | ! |
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[14834] | 68 | IF( .NOT. l_istiled .OR. ntile == 1 ) THEN ! Do only on the first tile |
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| 69 | IF( kt == nit000 ) THEN |
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| 70 | IF(lwp) WRITE(numout,*) |
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| 71 | IF(lwp) WRITE(numout,*) 'zdf_evd : Enhanced Vertical Diffusion (evd)' |
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| 72 | IF(lwp) WRITE(numout,*) '~~~~~~~ ' |
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| 73 | IF(lwp) WRITE(numout,*) |
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| 74 | ENDIF |
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| 75 | |
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| 76 | ALLOCATE( zavt_evd(jpi,jpj,jpk) ) |
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| 77 | IF( nn_evdm == 1 ) ALLOCATE( zavm_evd(jpi,jpj,jpk) ) |
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[3] | 78 | ENDIF |
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[5836] | 79 | ! |
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| 80 | ! |
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[14834] | 81 | DO_3D_OVR( nn_hls-1, nn_hls-1, nn_hls-1, nn_hls-1, 1, jpk ) |
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| 82 | zavt_evd(ji,jj,jk) = p_avt(ji,jj,jk) ! set avt prior to evd application |
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| 83 | END_3D |
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[5836] | 84 | ! |
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[1537] | 85 | SELECT CASE ( nn_evdm ) |
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[2715] | 86 | ! |
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[9019] | 87 | CASE ( 1 ) !== enhance tracer & momentum Kz ==! (if rn2<-1.e-12) |
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[2715] | 88 | ! |
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[14834] | 89 | DO_3D_OVR( nn_hls-1, nn_hls-1, nn_hls-1, nn_hls-1, 1, jpk ) |
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| 90 | zavm_evd(ji,jj,jk) = p_avm(ji,jj,jk) ! set avm prior to evd application |
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| 91 | END_3D |
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[1681] | 92 | ! |
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[9019] | 93 | !! change last digits results |
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| 94 | ! WHERE( MAX( rn2(2:jpi,2:jpj,2:jpkm1), rn2b(2:jpi,2:jpj,2:jpkm1) ) <= -1.e-12 ) THEN |
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| 95 | ! p_avt(2:jpi,2:jpj,2:jpkm1) = rn_evd * wmask(2:jpi,2:jpj,2:jpkm1) |
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| 96 | ! p_avm(2:jpi,2:jpj,2:jpkm1) = rn_evd * wmask(2:jpi,2:jpj,2:jpkm1) |
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| 97 | ! END WHERE |
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| 98 | ! |
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[14834] | 99 | DO_3D_OVR( nn_hls-1, nn_hls-1, nn_hls-1, nn_hls-1, 1, jpkm1 ) |
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[12377] | 100 | IF( MIN( rn2(ji,jj,jk), rn2b(ji,jj,jk) ) <= -1.e-12 ) THEN |
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| 101 | p_avt(ji,jj,jk) = rn_evd * wmask(ji,jj,jk) |
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| 102 | p_avm(ji,jj,jk) = rn_evd * wmask(ji,jj,jk) |
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| 103 | ENDIF |
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| 104 | END_3D |
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[1546] | 105 | ! |
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[14834] | 106 | DO_3D_OVR( nn_hls-1, nn_hls-1, nn_hls-1, nn_hls-1, 1, jpk ) |
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| 107 | zavm_evd(ji,jj,jk) = p_avm(ji,jj,jk) - zavm_evd(ji,jj,jk) ! change in avm due to evd |
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| 108 | END_3D |
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| 109 | IF( .NOT. l_istiled .OR. ntile == nijtile ) THEN ! Do only on the last tile |
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| 110 | CALL iom_put( "avm_evd", zavm_evd ) ! output this change |
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| 111 | DEALLOCATE( zavm_evd ) |
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| 112 | ENDIF |
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[1681] | 113 | ! |
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[9019] | 114 | CASE DEFAULT !== enhance tracer Kz ==! (if rn2<-1.e-12) |
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| 115 | !! change last digits results |
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| 116 | ! WHERE( MAX( rn2(2:jpi,2:jpj,2:jpkm1), rn2b(2:jpi,2:jpj,2:jpkm1) ) <= -1.e-12 ) |
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| 117 | ! p_avt(2:jpi,2:jpj,2:jpkm1) = rn_evd * wmask(2:jpi,2:jpj,2:jpkm1) |
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| 118 | ! END WHERE |
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| 119 | |
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[14834] | 120 | DO_3D_OVR( nn_hls-1, nn_hls-1, nn_hls-1, nn_hls-1, 1, jpkm1 ) |
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[12377] | 121 | IF( MIN( rn2(ji,jj,jk), rn2b(ji,jj,jk) ) <= -1.e-12 ) & |
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| 122 | p_avt(ji,jj,jk) = rn_evd * wmask(ji,jj,jk) |
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| 123 | END_3D |
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[1546] | 124 | ! |
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[3] | 125 | END SELECT |
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[9019] | 126 | ! |
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[14834] | 127 | DO_3D_OVR( nn_hls-1, nn_hls-1, nn_hls-1, nn_hls-1, 1, jpk ) |
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| 128 | zavt_evd(ji,jj,jk) = p_avt(ji,jj,jk) - zavt_evd(ji,jj,jk) ! change in avt due to evd |
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| 129 | END_3D |
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[15298] | 130 | ! |
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| 131 | IF( l_trdtra ) CALL trd_tra( kt, Kmm, Krhs, 'TRA', jp_tem, jptra_evd, zavt_evd ) |
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| 132 | ! |
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[14834] | 133 | IF( .NOT. l_istiled .OR. ntile == nijtile ) THEN ! Do only on the last tile |
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| 134 | CALL iom_put( "avt_evd", zavt_evd ) ! output this change |
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| 135 | DEALLOCATE( zavt_evd ) |
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| 136 | ENDIF |
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[1546] | 137 | ! |
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[3] | 138 | END SUBROUTINE zdf_evd |
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| 139 | |
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| 140 | !!====================================================================== |
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| 141 | END MODULE zdfevd |
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