[1418] | 1 | MODULE zdftmx |
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| 2 | !!======================================================================== |
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| 3 | !! *** MODULE zdftmx *** |
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| 4 | !! Ocean physics: vertical tidal mixing coefficient |
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| 5 | !!======================================================================== |
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| 6 | !! History : 1.0 ! 2004-04 (L. Bessieres, G. Madec) Original code |
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| 7 | !! - ! 2006-08 (A. Koch-Larrouy) Indonesian strait |
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[2528] | 8 | !! 3.3 ! 2010-10 (C. Ethe, G. Madec) reorganisation of initialisation phase |
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[1418] | 9 | !!---------------------------------------------------------------------- |
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[5836] | 10 | #if defined key_zdftmx |
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[1418] | 11 | !!---------------------------------------------------------------------- |
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| 12 | !! 'key_zdftmx' Tidal vertical mixing |
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| 13 | !!---------------------------------------------------------------------- |
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[3625] | 14 | !! zdf_tmx : global momentum & tracer Kz with tidal induced Kz |
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| 15 | !! tmx_itf : Indonesian momentum & tracer Kz with tidal induced Kz |
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[1418] | 16 | !!---------------------------------------------------------------------- |
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[3625] | 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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| 20 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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| 21 | USE eosbn2 ! ocean equation of state |
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| 22 | USE phycst ! physical constants |
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| 23 | USE prtctl ! Print control |
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| 24 | USE in_out_manager ! I/O manager |
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| 25 | USE iom ! I/O Manager |
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| 26 | USE lib_mpp ! MPP library |
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| 27 | USE wrk_nemo ! work arrays |
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| 28 | USE timing ! Timing |
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| 29 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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[1418] | 30 | |
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| 31 | IMPLICIT NONE |
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| 32 | PRIVATE |
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| 33 | |
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[2528] | 34 | PUBLIC zdf_tmx ! called in step module |
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| 35 | PUBLIC zdf_tmx_init ! called in opa module |
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[2715] | 36 | PUBLIC zdf_tmx_alloc ! called in nemogcm module |
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[1418] | 37 | |
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| 38 | LOGICAL, PUBLIC, PARAMETER :: lk_zdftmx = .TRUE. !: tidal mixing flag |
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| 39 | |
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[4147] | 40 | ! !!* Namelist namzdf_tmx : tidal mixing * |
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| 41 | REAL(wp) :: rn_htmx ! vertical decay scale for turbulence (meters) |
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| 42 | REAL(wp) :: rn_n2min ! threshold of the Brunt-Vaisala frequency (s-1) |
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| 43 | REAL(wp) :: rn_tfe ! tidal dissipation efficiency (St Laurent et al. 2002) |
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| 44 | REAL(wp) :: rn_me ! mixing efficiency (Osborn 1980) |
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| 45 | LOGICAL :: ln_tmx_itf ! Indonesian Through Flow (ITF): Koch-Larrouy et al. (2007) parameterization |
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| 46 | REAL(wp) :: rn_tfe_itf ! ITF tidal dissipation efficiency (St Laurent et al. 2002) |
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[1418] | 47 | |
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[2715] | 48 | REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: en_tmx ! energy available for tidal mixing (W/m2) |
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| 49 | REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: mask_itf ! mask to use over Indonesian area |
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| 50 | REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: az_tmx ! coefficient used to evaluate the tidal induced Kz |
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[1418] | 51 | |
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| 52 | !! * Substitutions |
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| 53 | # include "vectopt_loop_substitute.h90" |
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| 54 | !!---------------------------------------------------------------------- |
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[5836] | 55 | !! NEMO/OPA 3.7 , NEMO Consortium (2014) |
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[2528] | 56 | !! $Id$ |
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[2715] | 57 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[1418] | 58 | !!---------------------------------------------------------------------- |
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| 59 | CONTAINS |
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| 60 | |
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[2715] | 61 | INTEGER FUNCTION zdf_tmx_alloc() |
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| 62 | !!---------------------------------------------------------------------- |
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| 63 | !! *** FUNCTION zdf_tmx_alloc *** |
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| 64 | !!---------------------------------------------------------------------- |
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| 65 | ALLOCATE(en_tmx(jpi,jpj), mask_itf(jpi,jpj), az_tmx(jpi,jpj,jpk), STAT=zdf_tmx_alloc ) |
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| 66 | ! |
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| 67 | IF( lk_mpp ) CALL mpp_sum ( zdf_tmx_alloc ) |
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| 68 | IF( zdf_tmx_alloc /= 0 ) CALL ctl_warn('zdf_tmx_alloc: failed to allocate arrays') |
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| 69 | END FUNCTION zdf_tmx_alloc |
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| 70 | |
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| 71 | |
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[1418] | 72 | SUBROUTINE zdf_tmx( kt ) |
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| 73 | !!---------------------------------------------------------------------- |
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| 74 | !! *** ROUTINE zdf_tmx *** |
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| 75 | !! |
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| 76 | !! ** Purpose : add to the vertical mixing coefficients the effect of |
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[1496] | 77 | !! tidal mixing (Simmons et al 2004). |
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[1418] | 78 | !! |
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| 79 | !! ** Method : - tidal-induced vertical mixing is given by: |
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[1496] | 80 | !! Kz_tides = az_tmx / max( rn_n2min, N^2 ) |
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| 81 | !! where az_tmx is a coefficient that specified the 3D space |
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| 82 | !! distribution of the faction of tidal energy taht is used |
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| 83 | !! for mixing. Its expression is set in zdf_tmx_init routine, |
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| 84 | !! following Simmons et al. 2004. |
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| 85 | !! NB: a specific bounding procedure is performed on av_tide |
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| 86 | !! so that the input tidal energy is actually almost used. The |
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| 87 | !! basic maximum value is 60 cm2/s, but values of 300 cm2/s |
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| 88 | !! can be reached in area where bottom stratification is too |
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| 89 | !! weak. |
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[1418] | 90 | !! |
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[1496] | 91 | !! - update av_tide in the Indonesian Through Flow area |
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| 92 | !! following Koch-Larrouy et al. (2007) parameterisation |
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| 93 | !! (see tmx_itf routine). |
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[1418] | 94 | !! |
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[1496] | 95 | !! - update the model vertical eddy viscosity and diffusivity: |
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| 96 | !! avt = avt + av_tides |
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[1527] | 97 | !! avm = avm + av_tides |
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[1496] | 98 | !! avmu = avmu + mi(av_tides) |
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| 99 | !! avmv = avmv + mj(av_tides) |
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| 100 | !! |
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[1527] | 101 | !! ** Action : avt, avm, avmu, avmv increased by tidal mixing |
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[1496] | 102 | !! |
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[1418] | 103 | !! References : Simmons et al. 2004, Ocean Modelling, 6, 3-4, 245-263. |
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[1496] | 104 | !! Koch-Larrouy et al. 2007, GRL. |
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[1418] | 105 | !!---------------------------------------------------------------------- |
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| 106 | INTEGER, INTENT(in) :: kt ! ocean time-step |
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[5836] | 107 | ! |
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[1418] | 108 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 109 | REAL(wp) :: ztpc ! scalar workspace |
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[5836] | 110 | REAL(wp), POINTER, DIMENSION(:,:) :: zkz |
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| 111 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zav_tide |
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[1418] | 112 | !!---------------------------------------------------------------------- |
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[3294] | 113 | ! |
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| 114 | IF( nn_timing == 1 ) CALL timing_start('zdf_tmx') |
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| 115 | ! |
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[5836] | 116 | CALL wrk_alloc( jpi,jpj, zkz ) |
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| 117 | CALL wrk_alloc( jpi,jpj,jpk, zav_tide ) |
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| 118 | ! |
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[1546] | 119 | ! ! ----------------------- ! |
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| 120 | ! ! Standard tidal mixing ! (compute zav_tide) |
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| 121 | ! ! ----------------------- ! |
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[1496] | 122 | ! !* First estimation (with n2 bound by rn_n2min) bounded by 60 cm2/s |
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[1546] | 123 | zav_tide(:,:,:) = MIN( 60.e-4, az_tmx(:,:,:) / MAX( rn_n2min, rn2(:,:,:) ) ) |
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[1418] | 124 | |
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[1496] | 125 | zkz(:,:) = 0.e0 !* Associated potential energy consummed over the whole water column |
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[1418] | 126 | DO jk = 2, jpkm1 |
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[6140] | 127 | zkz(:,:) = zkz(:,:) + e3w_n(:,:,jk) * MAX( 0.e0, rn2(:,:,jk) ) * rau0 * zav_tide(:,:,jk) * wmask(:,:,jk) |
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[1418] | 128 | END DO |
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| 129 | |
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[1496] | 130 | DO jj = 1, jpj !* Here zkz should be equal to en_tmx ==> multiply by en_tmx/zkz to recover en_tmx |
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[1418] | 131 | DO ji = 1, jpi |
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| 132 | IF( zkz(ji,jj) /= 0.e0 ) zkz(ji,jj) = en_tmx(ji,jj) / zkz(ji,jj) |
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| 133 | END DO |
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| 134 | END DO |
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| 135 | |
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[5120] | 136 | DO jk = 2, jpkm1 !* Mutiply by zkz to recover en_tmx, BUT bound by 30/6 ==> zav_tide bound by 300 cm2/s |
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[5836] | 137 | zav_tide(:,:,jk) = zav_tide(:,:,jk) * MIN( zkz(:,:), 30./6. ) * wmask(:,:,jk) !kz max = 300 cm2/s |
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[1418] | 138 | END DO |
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| 139 | |
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[1546] | 140 | IF( kt == nit000 ) THEN !* check at first time-step: diagnose the energy consumed by zav_tide |
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[5836] | 141 | ztpc = 0._wp |
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[1418] | 142 | DO jk= 1, jpk |
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| 143 | DO jj= 1, jpj |
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| 144 | DO ji= 1, jpi |
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[6140] | 145 | ztpc = ztpc + e3w_n(ji,jj,jk) * e1e2t(ji,jj) & |
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[5836] | 146 | & * MAX( 0.e0, rn2(ji,jj,jk) ) * zav_tide(ji,jj,jk) * tmask(ji,jj,jk) * tmask_i(ji,jj) |
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[1418] | 147 | END DO |
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| 148 | END DO |
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| 149 | END DO |
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[1495] | 150 | ztpc= rau0 / ( rn_tfe * rn_me ) * ztpc |
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[5836] | 151 | IF( lk_mpp ) CALL mpp_sum( ztpc ) |
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[1418] | 152 | IF(lwp) WRITE(numout,*) |
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[1496] | 153 | IF(lwp) WRITE(numout,*) ' N Total power consumption by av_tide : ztpc = ', ztpc * 1.e-12 ,'TW' |
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[1418] | 154 | ENDIF |
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[1495] | 155 | |
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[1546] | 156 | ! ! ----------------------- ! |
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| 157 | ! ! ITF tidal mixing ! (update zav_tide) |
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| 158 | ! ! ----------------------- ! |
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| 159 | IF( ln_tmx_itf ) CALL tmx_itf( kt, zav_tide ) |
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[1418] | 160 | |
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[1546] | 161 | ! ! ----------------------- ! |
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| 162 | ! ! Update mixing coefs ! |
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| 163 | ! ! ----------------------- ! |
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[5120] | 164 | DO jk = 2, jpkm1 !* update momentum & tracer diffusivity with tidal mixing |
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[5836] | 165 | avt(:,:,jk) = avt(:,:,jk) + zav_tide(:,:,jk) * wmask(:,:,jk) |
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| 166 | avm(:,:,jk) = avm(:,:,jk) + zav_tide(:,:,jk) * wmask(:,:,jk) |
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[5120] | 167 | DO jj = 2, jpjm1 |
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| 168 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 169 | avmu(ji,jj,jk) = avmu(ji,jj,jk) + 0.5 * ( zav_tide(ji,jj,jk) + zav_tide(ji+1,jj ,jk) ) * wumask(ji,jj,jk) |
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| 170 | avmv(ji,jj,jk) = avmv(ji,jj,jk) + 0.5 * ( zav_tide(ji,jj,jk) + zav_tide(ji ,jj+1,jk) ) * wvmask(ji,jj,jk) |
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[1418] | 171 | END DO |
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| 172 | END DO |
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| 173 | END DO |
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[1496] | 174 | CALL lbc_lnk( avmu, 'U', 1. ) ; CALL lbc_lnk( avmv, 'V', 1. ) ! lateral boundary condition |
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[1418] | 175 | |
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[1546] | 176 | ! !* output tidal mixing coefficient |
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| 177 | CALL iom_put( "av_tide", zav_tide ) |
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| 178 | |
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| 179 | IF(ln_ctl) CALL prt_ctl(tab3d_1=zav_tide , clinfo1=' tmx - av_tide: ', tab3d_2=avt, clinfo2=' avt: ', ovlap=1, kdim=jpk) |
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[1418] | 180 | ! |
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[5836] | 181 | CALL wrk_dealloc( jpi,jpj, zkz ) |
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| 182 | CALL wrk_dealloc( jpi,jpj,jpk, zav_tide ) |
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[2715] | 183 | ! |
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[3294] | 184 | IF( nn_timing == 1 ) CALL timing_stop('zdf_tmx') |
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| 185 | ! |
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[1418] | 186 | END SUBROUTINE zdf_tmx |
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| 187 | |
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| 188 | |
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[1546] | 189 | SUBROUTINE tmx_itf( kt, pav ) |
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[1418] | 190 | !!---------------------------------------------------------------------- |
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| 191 | !! *** ROUTINE tmx_itf *** |
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| 192 | !! |
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[1496] | 193 | !! ** Purpose : modify the vertical eddy diffusivity coefficients |
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[1546] | 194 | !! (pav) in the Indonesian Through Flow area (ITF). |
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[1418] | 195 | !! |
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[1496] | 196 | !! ** Method : - Following Koch-Larrouy et al. (2007), in the ITF defined |
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| 197 | !! by msk_itf (read in a file, see tmx_init), the tidal |
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| 198 | !! mixing coefficient is computed with : |
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| 199 | !! * q=1 (i.e. all the tidal energy remains trapped in |
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| 200 | !! the area and thus is used for mixing) |
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| 201 | !! * the vertical distribution of the tifal energy is a |
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| 202 | !! proportional to N above the thermocline (d(N^2)/dz > 0) |
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| 203 | !! and to N^2 below the thermocline (d(N^2)/dz < 0) |
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[1418] | 204 | !! |
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[1496] | 205 | !! ** Action : av_tide updated in the ITF area (msk_itf) |
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[1418] | 206 | !! |
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| 207 | !! References : Koch-Larrouy et al. 2007, GRL |
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| 208 | !!---------------------------------------------------------------------- |
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[1546] | 209 | INTEGER , INTENT(in ) :: kt ! ocean time-step |
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| 210 | REAL(wp), INTENT(inout), DIMENSION(jpi,jpj,jpk) :: pav ! Tidal mixing coef. |
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[1418] | 211 | !! |
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[1495] | 212 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 213 | REAL(wp) :: zcoef, ztpc ! temporary scalar |
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[3294] | 214 | REAL(wp), DIMENSION(:,:) , POINTER :: zkz ! 2D workspace |
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| 215 | REAL(wp), DIMENSION(:,:) , POINTER :: zsum1 , zsum2 , zsum ! - - |
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| 216 | REAL(wp), DIMENSION(:,:,:), POINTER :: zempba_3d_1, zempba_3d_2 ! 3D workspace |
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| 217 | REAL(wp), DIMENSION(:,:,:), POINTER :: zempba_3d , zdn2dz ! - - |
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| 218 | REAL(wp), DIMENSION(:,:,:), POINTER :: zavt_itf ! - - |
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[1418] | 219 | !!---------------------------------------------------------------------- |
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[2715] | 220 | ! |
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[3294] | 221 | IF( nn_timing == 1 ) CALL timing_start('tmx_itf') |
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| 222 | ! |
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| 223 | CALL wrk_alloc( jpi,jpj, zkz, zsum1 , zsum2 , zsum ) |
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| 224 | CALL wrk_alloc( jpi,jpj,jpk, zempba_3d_1, zempba_3d_2, zempba_3d, zdn2dz, zavt_itf ) |
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| 225 | |
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[1418] | 226 | ! ! compute the form function using N2 at each time step |
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[1518] | 227 | zempba_3d_1(:,:,jpk) = 0.e0 |
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| 228 | zempba_3d_2(:,:,jpk) = 0.e0 |
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| 229 | DO jk = 1, jpkm1 |
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| 230 | zdn2dz (:,:,jk) = rn2(:,:,jk) - rn2(:,:,jk+1) ! Vertical profile of dN2/dz |
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| 231 | zempba_3d_1(:,:,jk) = SQRT( MAX( 0.e0, rn2(:,:,jk) ) ) ! - - of N |
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| 232 | zempba_3d_2(:,:,jk) = MAX( 0.e0, rn2(:,:,jk) ) ! - - of N^2 |
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[1418] | 233 | END DO |
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[1518] | 234 | ! |
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| 235 | zsum (:,:) = 0.e0 |
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| 236 | zsum1(:,:) = 0.e0 |
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| 237 | zsum2(:,:) = 0.e0 |
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[1418] | 238 | DO jk= 2, jpk |
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[6140] | 239 | zsum1(:,:) = zsum1(:,:) + zempba_3d_1(:,:,jk) * e3w_n(:,:,jk) * wmask(:,:,jk) |
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| 240 | zsum2(:,:) = zsum2(:,:) + zempba_3d_2(:,:,jk) * e3w_n(:,:,jk) * wmask(:,:,jk) |
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[1418] | 241 | END DO |
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| 242 | DO jj = 1, jpj |
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[1518] | 243 | DO ji = 1, jpi |
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| 244 | IF( zsum1(ji,jj) /= 0.e0 ) zsum1(ji,jj) = 1.e0 / zsum1(ji,jj) |
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| 245 | IF( zsum2(ji,jj) /= 0.e0 ) zsum2(ji,jj) = 1.e0 / zsum2(ji,jj) |
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| 246 | END DO |
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[1418] | 247 | END DO |
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| 248 | |
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| 249 | DO jk= 1, jpk |
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| 250 | DO jj = 1, jpj |
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| 251 | DO ji = 1, jpi |
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[1518] | 252 | zcoef = 0.5 - SIGN( 0.5, zdn2dz(ji,jj,jk) ) ! =0 if dN2/dz > 0, =1 otherwise |
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| 253 | ztpc = zempba_3d_1(ji,jj,jk) * zsum1(ji,jj) * zcoef & |
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| 254 | & + zempba_3d_2(ji,jj,jk) * zsum2(ji,jj) * ( 1. - zcoef ) |
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| 255 | ! |
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| 256 | zempba_3d(ji,jj,jk) = ztpc |
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[6140] | 257 | zsum (ji,jj) = zsum(ji,jj) + ztpc * e3w_n(ji,jj,jk) |
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[1418] | 258 | END DO |
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| 259 | END DO |
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| 260 | END DO |
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| 261 | DO jj = 1, jpj |
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| 262 | DO ji = 1, jpi |
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[1518] | 263 | IF( zsum(ji,jj) > 0.e0 ) zsum(ji,jj) = 1.e0 / zsum(ji,jj) |
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[1418] | 264 | END DO |
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| 265 | END DO |
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| 266 | |
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[1495] | 267 | ! ! first estimation bounded by 10 cm2/s (with n2 bounded by rn_n2min) |
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| 268 | zcoef = rn_tfe_itf / ( rn_tfe * rau0 ) |
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[1518] | 269 | DO jk = 1, jpk |
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| 270 | zavt_itf(:,:,jk) = MIN( 10.e-4, zcoef * en_tmx(:,:) * zsum(:,:) * zempba_3d(:,:,jk) & |
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| 271 | & / MAX( rn_n2min, rn2(:,:,jk) ) * tmask(:,:,jk) ) |
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[1495] | 272 | END DO |
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[1418] | 273 | |
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| 274 | zkz(:,:) = 0.e0 ! Associated potential energy consummed over the whole water column |
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| 275 | DO jk = 2, jpkm1 |
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[6140] | 276 | zkz(:,:) = zkz(:,:) + e3w_n(:,:,jk) * MAX( 0.e0, rn2(:,:,jk) ) * rau0 * zavt_itf(:,:,jk) * wmask(:,:,jk) |
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[1418] | 277 | END DO |
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| 278 | |
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| 279 | DO jj = 1, jpj ! Here zkz should be equal to en_tmx ==> multiply by en_tmx/zkz to recover en_tmx |
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| 280 | DO ji = 1, jpi |
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| 281 | IF( zkz(ji,jj) /= 0.e0 ) zkz(ji,jj) = en_tmx(ji,jj) * rn_tfe_itf / rn_tfe / zkz(ji,jj) |
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| 282 | END DO |
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| 283 | END DO |
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| 284 | |
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[1495] | 285 | DO jk = 2, jpkm1 ! Mutiply by zkz to recover en_tmx, BUT bound by 30/6 ==> zavt_itf bound by 300 cm2/s |
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[5836] | 286 | zavt_itf(:,:,jk) = zavt_itf(:,:,jk) * MIN( zkz(:,:), 120./10. ) * wmask(:,:,jk) ! kz max = 120 cm2/s |
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[1418] | 287 | END DO |
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| 288 | |
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[1495] | 289 | IF( kt == nit000 ) THEN ! diagnose the nergy consumed by zavt_itf |
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[1418] | 290 | ztpc = 0.e0 |
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| 291 | DO jk= 1, jpk |
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| 292 | DO jj= 1, jpj |
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| 293 | DO ji= 1, jpi |
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[6140] | 294 | ztpc = ztpc + e1e2t(ji,jj) * e3w_n(ji,jj,jk) * MAX( 0.e0, rn2(ji,jj,jk) ) & |
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[5836] | 295 | & * zavt_itf(ji,jj,jk) * tmask(ji,jj,jk) * tmask_i(ji,jj) |
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[1418] | 296 | END DO |
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| 297 | END DO |
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| 298 | END DO |
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[5836] | 299 | IF( lk_mpp ) CALL mpp_sum( ztpc ) |
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[1495] | 300 | ztpc= rau0 * ztpc / ( rn_me * rn_tfe_itf ) |
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| 301 | IF(lwp) WRITE(numout,*) ' N Total power consumption by zavt_itf: ztpc = ', ztpc * 1.e-12 ,'TW' |
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[1418] | 302 | ENDIF |
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| 303 | |
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[1546] | 304 | ! ! Update pav with the ITF mixing coefficient |
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[1418] | 305 | DO jk = 2, jpkm1 |
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[1546] | 306 | pav(:,:,jk) = pav (:,:,jk) * ( 1.e0 - mask_itf(:,:) ) & |
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| 307 | & + zavt_itf(:,:,jk) * mask_itf(:,:) |
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[1418] | 308 | END DO |
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| 309 | ! |
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[3294] | 310 | CALL wrk_dealloc( jpi,jpj, zkz, zsum1 , zsum2 , zsum ) |
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| 311 | CALL wrk_dealloc( jpi,jpj,jpk, zempba_3d_1, zempba_3d_2, zempba_3d, zdn2dz, zavt_itf ) |
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[2715] | 312 | ! |
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[3294] | 313 | IF( nn_timing == 1 ) CALL timing_stop('tmx_itf') |
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| 314 | ! |
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[1418] | 315 | END SUBROUTINE tmx_itf |
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| 316 | |
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| 317 | |
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| 318 | SUBROUTINE zdf_tmx_init |
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| 319 | !!---------------------------------------------------------------------- |
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| 320 | !! *** ROUTINE zdf_tmx_init *** |
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| 321 | !! |
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| 322 | !! ** Purpose : Initialization of the vertical tidal mixing, Reading |
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[1496] | 323 | !! of M2 and K1 tidal energy in nc files |
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[1418] | 324 | !! |
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[1496] | 325 | !! ** Method : - Read the namtmx namelist and check the parameters |
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| 326 | !! |
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| 327 | !! - Read the input data in NetCDF files : |
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| 328 | !! M2 and K1 tidal energy. The total tidal energy, en_tmx, |
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| 329 | !! is the sum of M2, K1 and S2 energy where S2 is assumed |
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| 330 | !! to be: S2=(1/2)^2 * M2 |
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| 331 | !! mask_itf, a mask array that determine where substituing |
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| 332 | !! the standard Simmons et al. (2005) formulation with the |
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| 333 | !! one of Koch_Larrouy et al. (2007). |
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| 334 | !! |
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[1418] | 335 | !! - Compute az_tmx, a 3D coefficient that allows to compute |
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[1496] | 336 | !! the standard tidal-induced vertical mixing as follows: |
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| 337 | !! Kz_tides = az_tmx / max( rn_n2min, N^2 ) |
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| 338 | !! with az_tmx a bottom intensified coefficient is given by: |
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| 339 | !! az_tmx(z) = en_tmx / ( rau0 * rn_htmx ) * EXP( -(H-z)/rn_htmx ) |
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| 340 | !! / ( 1. - EXP( - H /rn_htmx ) ) |
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| 341 | !! where rn_htmx the characteristic length scale of the bottom |
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| 342 | !! intensification, en_tmx the tidal energy, and H the ocean depth |
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[1418] | 343 | !! |
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| 344 | !! ** input : - Namlist namtmx |
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[1496] | 345 | !! - NetCDF file : M2_ORCA2.nc, K1_ORCA2.nc, and mask_itf.nc |
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[1418] | 346 | !! |
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| 347 | !! ** Action : - Increase by 1 the nstop flag is setting problem encounter |
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| 348 | !! - defined az_tmx used to compute tidal-induced mixing |
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[1496] | 349 | !! |
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| 350 | !! References : Simmons et al. 2004, Ocean Modelling, 6, 3-4, 245-263. |
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| 351 | !! Koch-Larrouy et al. 2007, GRL. |
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[1418] | 352 | !!---------------------------------------------------------------------- |
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[2715] | 353 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 354 | INTEGER :: inum ! local integer |
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[4147] | 355 | INTEGER :: ios |
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[2715] | 356 | REAL(wp) :: ztpc, ze_z ! local scalars |
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[5836] | 357 | REAL(wp), DIMENSION(:,:) , POINTER :: zem2, zek1 ! read M2 and K1 tidal energy |
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| 358 | REAL(wp), DIMENSION(:,:) , POINTER :: zkz ! total M2, K1 and S2 tidal energy |
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| 359 | REAL(wp), DIMENSION(:,:) , POINTER :: zfact ! used for vertical structure function |
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| 360 | REAL(wp), DIMENSION(:,:) , POINTER :: zhdep ! Ocean depth |
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| 361 | REAL(wp), DIMENSION(:,:,:), POINTER :: zpc, zav_tide ! power consumption |
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[1496] | 362 | !! |
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[1601] | 363 | NAMELIST/namzdf_tmx/ rn_htmx, rn_n2min, rn_tfe, rn_me, ln_tmx_itf, rn_tfe_itf |
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[1418] | 364 | !!---------------------------------------------------------------------- |
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[3294] | 365 | ! |
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| 366 | IF( nn_timing == 1 ) CALL timing_start('zdf_tmx_init') |
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| 367 | ! |
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[5836] | 368 | CALL wrk_alloc( jpi,jpj, zem2, zek1, zkz, zfact, zhdep ) |
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| 369 | CALL wrk_alloc( jpi,jpj,jpk, zpc, zav_tide ) |
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| 370 | ! |
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| 371 | REWIND( numnam_ref ) ! Namelist namzdf_tmx in reference namelist : Tidal Mixing |
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[4147] | 372 | READ ( numnam_ref, namzdf_tmx, IOSTAT = ios, ERR = 901) |
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| 373 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namzdf_tmx in reference namelist', lwp ) |
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[5836] | 374 | ! |
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| 375 | REWIND( numnam_cfg ) ! Namelist namzdf_tmx in configuration namelist : Tidal Mixing |
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[4147] | 376 | READ ( numnam_cfg, namzdf_tmx, IOSTAT = ios, ERR = 902 ) |
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| 377 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namzdf_tmx in configuration namelist', lwp ) |
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[4624] | 378 | IF(lwm) WRITE ( numond, namzdf_tmx ) |
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[5836] | 379 | ! |
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| 380 | IF(lwp) THEN ! Control print |
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[1418] | 381 | WRITE(numout,*) |
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| 382 | WRITE(numout,*) 'zdf_tmx_init : tidal mixing' |
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| 383 | WRITE(numout,*) '~~~~~~~~~~~~' |
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[1601] | 384 | WRITE(numout,*) ' Namelist namzdf_tmx : set tidal mixing parameters' |
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[1537] | 385 | WRITE(numout,*) ' Vertical decay scale for turbulence = ', rn_htmx |
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| 386 | WRITE(numout,*) ' Brunt-Vaisala frequency threshold = ', rn_n2min |
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| 387 | WRITE(numout,*) ' Tidal dissipation efficiency = ', rn_tfe |
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| 388 | WRITE(numout,*) ' Mixing efficiency = ', rn_me |
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| 389 | WRITE(numout,*) ' ITF specific parameterisation = ', ln_tmx_itf |
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| 390 | WRITE(numout,*) ' ITF tidal dissipation efficiency = ', rn_tfe_itf |
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[1418] | 391 | ENDIF |
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[5836] | 392 | ! ! allocate tmx arrays |
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[2715] | 393 | IF( zdf_tmx_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'zdf_tmx_init : unable to allocate tmx arrays' ) |
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| 394 | |
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[5836] | 395 | IF( ln_tmx_itf ) THEN ! read the Indonesian Through Flow mask |
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[1518] | 396 | CALL iom_open('mask_itf',inum) |
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| 397 | CALL iom_get (inum, jpdom_data, 'tmaskitf',mask_itf,1) ! |
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| 398 | CALL iom_close(inum) |
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| 399 | ENDIF |
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[5836] | 400 | ! ! read M2 tidal energy flux : W/m2 ( zem2 < 0 ) |
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[1418] | 401 | CALL iom_open('M2rowdrg',inum) |
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| 402 | CALL iom_get (inum, jpdom_data, 'field',zem2,1) ! |
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| 403 | CALL iom_close(inum) |
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[5836] | 404 | ! ! read K1 tidal energy flux : W/m2 ( zek1 < 0 ) |
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[1418] | 405 | CALL iom_open('K1rowdrg',inum) |
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| 406 | CALL iom_get (inum, jpdom_data, 'field',zek1,1) ! |
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| 407 | CALL iom_close(inum) |
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[5836] | 408 | ! ! Total tidal energy ( M2, S2 and K1 with S2=(1/2)^2 * M2 ) |
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| 409 | ! ! only the energy available for mixing is taken into account, |
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| 410 | ! ! (mixing efficiency tidal dissipation efficiency) |
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[4990] | 411 | en_tmx(:,:) = - rn_tfe * rn_me * ( zem2(:,:) * 1.25 + zek1(:,:) ) * ssmask(:,:) |
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[1418] | 412 | |
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[5021] | 413 | !============ |
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| 414 | !TG: Bug for VVL? Should this section be moved out of _init and be updated at every timestep? |
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[5836] | 415 | !!gm : you are right, but tidal mixing acts in deep ocean (H>500m) where e3 is O(100m) |
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| 416 | !! the error is thus ~1% which I feel comfortable with, compared to uncertainties in tidal energy dissipation. |
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| 417 | ! ! Vertical structure (az_tmx) |
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| 418 | DO jj = 1, jpj ! part independent of the level |
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[1418] | 419 | DO ji = 1, jpi |
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[5021] | 420 | zhdep(ji,jj) = gdepw_0(ji,jj,mbkt(ji,jj)+1) ! depth of the ocean |
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[1418] | 421 | zfact(ji,jj) = rau0 * rn_htmx * ( 1. - EXP( -zhdep(ji,jj) / rn_htmx ) ) |
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| 422 | IF( zfact(ji,jj) /= 0 ) zfact(ji,jj) = en_tmx(ji,jj) / zfact(ji,jj) |
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| 423 | END DO |
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| 424 | END DO |
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[5836] | 425 | DO jk= 1, jpk ! complete with the level-dependent part |
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[1418] | 426 | DO jj = 1, jpj |
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| 427 | DO ji = 1, jpi |
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[5021] | 428 | az_tmx(ji,jj,jk) = zfact(ji,jj) * EXP( -( zhdep(ji,jj)-gdepw_0(ji,jj,jk) ) / rn_htmx ) * tmask(ji,jj,jk) |
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[1418] | 429 | END DO |
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| 430 | END DO |
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| 431 | END DO |
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[5021] | 432 | !=========== |
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[5836] | 433 | ! |
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[1418] | 434 | IF( nprint == 1 .AND. lwp ) THEN |
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| 435 | ! Control print |
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| 436 | ! Total power consumption due to vertical mixing |
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[1546] | 437 | ! zpc = rau0 * 1/rn_me * rn2 * zav_tide |
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| 438 | zav_tide(:,:,:) = 0.e0 |
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[1418] | 439 | DO jk = 2, jpkm1 |
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[1546] | 440 | zav_tide(:,:,jk) = az_tmx(:,:,jk) / MAX( rn_n2min, rn2(:,:,jk) ) |
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[1418] | 441 | END DO |
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[5836] | 442 | ! |
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| 443 | ztpc = 0._wp |
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[1546] | 444 | zpc(:,:,:) = MAX(rn_n2min,rn2(:,:,:)) * zav_tide(:,:,:) |
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[5120] | 445 | DO jk= 2, jpkm1 |
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| 446 | DO jj = 1, jpj |
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| 447 | DO ji = 1, jpi |
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[6140] | 448 | ztpc = ztpc + e3w_n(ji,jj,jk) * e1e2t(ji,jj) * zpc(ji,jj,jk) * wmask(ji,jj,jk) * tmask_i(ji,jj) |
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[1418] | 449 | END DO |
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| 450 | END DO |
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| 451 | END DO |
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[5836] | 452 | IF( lk_mpp ) CALL mpp_sum( ztpc ) |
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[1418] | 453 | ztpc= rau0 * 1/(rn_tfe * rn_me) * ztpc |
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[5836] | 454 | ! |
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[1418] | 455 | WRITE(numout,*) |
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| 456 | WRITE(numout,*) ' Total power consumption of the tidally driven part of Kz : ztpc = ', ztpc * 1.e-12 ,'TW' |
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[5836] | 457 | ! |
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[1418] | 458 | ! control print 2 |
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[1546] | 459 | zav_tide(:,:,:) = MIN( zav_tide(:,:,:), 60.e-4 ) |
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[5836] | 460 | zkz(:,:) = 0._wp |
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[5120] | 461 | DO jk = 2, jpkm1 |
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[6140] | 462 | zkz(:,:) = zkz(:,:) + e3w_n(:,:,jk) * MAX(0.e0, rn2(:,:,jk)) * rau0 * zav_tide(:,:,jk) * wmask(:,:,jk) |
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[1418] | 463 | END DO |
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| 464 | ! Here zkz should be equal to en_tmx ==> multiply by en_tmx/zkz |
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| 465 | DO jj = 1, jpj |
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| 466 | DO ji = 1, jpi |
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| 467 | IF( zkz(ji,jj) /= 0.e0 ) THEN |
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| 468 | zkz(ji,jj) = en_tmx(ji,jj) / zkz(ji,jj) |
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| 469 | ENDIF |
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| 470 | END DO |
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| 471 | END DO |
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| 472 | ztpc = 1.e50 |
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| 473 | DO jj = 1, jpj |
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| 474 | DO ji = 1, jpi |
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| 475 | IF( zkz(ji,jj) /= 0.e0 ) THEN |
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| 476 | ztpc = Min( zkz(ji,jj), ztpc) |
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| 477 | ENDIF |
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| 478 | END DO |
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| 479 | END DO |
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| 480 | WRITE(numout,*) ' Min de zkz ', ztpc, ' Max = ', maxval(zkz(:,:) ) |
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[5836] | 481 | ! |
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[5120] | 482 | DO jk = 2, jpkm1 |
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[5836] | 483 | zav_tide(:,:,jk) = zav_tide(:,:,jk) * MIN( zkz(:,:), 30./6. ) * wmask(:,:,jk) !kz max = 300 cm2/s |
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[1418] | 484 | END DO |
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[5836] | 485 | ztpc = 0._wp |
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[1546] | 486 | zpc(:,:,:) = Max(0.e0,rn2(:,:,:)) * zav_tide(:,:,:) |
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[1418] | 487 | DO jk= 1, jpk |
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| 488 | DO jj = 1, jpj |
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| 489 | DO ji = 1, jpi |
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[6140] | 490 | ztpc = ztpc + e3w_n(ji,jj,jk) * e1e2t(ji,jj) * zpc(ji,jj,jk) * wmask(ji,jj,jk) * tmask_i(ji,jj) |
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[1418] | 491 | END DO |
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| 492 | END DO |
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| 493 | END DO |
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[5836] | 494 | IF( lk_mpp ) CALL mpp_sum( ztpc ) |
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[1418] | 495 | ztpc= rau0 * 1/(rn_tfe * rn_me) * ztpc |
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| 496 | WRITE(numout,*) ' 2 Total power consumption of the tidally driven part of Kz : ztpc = ', ztpc * 1.e-12 ,'TW' |
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[5836] | 497 | !!gm bug mpp in these diagnostics |
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[1418] | 498 | DO jk = 1, jpk |
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[5836] | 499 | ze_z = SUM( e1e2t(:,:) * zav_tide(:,:,jk) * tmask_i(:,:) ) & |
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| 500 | & / MAX( 1.e-20, SUM( e1e2t(:,:) * wmask (:,:,jk) * tmask_i(:,:) ) ) |
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| 501 | ztpc = 1.e50 |
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[1418] | 502 | DO jj = 1, jpj |
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| 503 | DO ji = 1, jpi |
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[5836] | 504 | IF( zav_tide(ji,jj,jk) /= 0.e0 ) ztpc = MIN( ztpc, zav_tide(ji,jj,jk) ) |
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[1418] | 505 | END DO |
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| 506 | END DO |
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| 507 | WRITE(numout,*) ' N2 min - jk= ', jk,' ', ze_z * 1.e4,' cm2/s min= ',ztpc*1.e4, & |
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[1546] | 508 | & 'max= ', MAXVAL(zav_tide(:,:,jk) )*1.e4, ' cm2/s' |
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[1418] | 509 | END DO |
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| 510 | |
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[5836] | 511 | WRITE(numout,*) ' e_tide : ', SUM( e1e2t*en_tmx ) / ( rn_tfe * rn_me ) * 1.e-12, 'TW' |
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[1418] | 512 | WRITE(numout,*) |
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| 513 | WRITE(numout,*) ' Initial profile of tidal vertical mixing' |
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| 514 | DO jk = 1, jpk |
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| 515 | DO jj = 1,jpj |
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| 516 | DO ji = 1,jpi |
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| 517 | zkz(ji,jj) = az_tmx(ji,jj,jk) /MAX( rn_n2min, rn2(ji,jj,jk) ) |
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| 518 | END DO |
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| 519 | END DO |
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[5836] | 520 | ze_z = SUM( e1e2t(:,:) * zkz (:,:) * tmask_i(:,:) ) & |
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| 521 | & / MAX( 1.e-20, SUM( e1e2t(:,:) * wmask(:,:,jk) * tmask_i(:,:) ) ) |
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[1418] | 522 | WRITE(numout,*) ' jk= ', jk,' ', ze_z * 1.e4,' cm2/s' |
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| 523 | END DO |
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| 524 | DO jk = 1, jpk |
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| 525 | zkz(:,:) = az_tmx(:,:,jk) /rn_n2min |
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[5836] | 526 | ze_z = SUM( e1e2t(:,:) * zkz (:,:) * tmask_i(:,:) ) & |
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| 527 | & / MAX( 1.e-20, SUM( e1e2t(:,:) * wmask(:,:,jk) * tmask_i(:,:) ) ) |
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[1418] | 528 | WRITE(numout,*) |
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| 529 | WRITE(numout,*) ' N2 min - jk= ', jk,' ', ze_z * 1.e4,' cm2/s min= ',MINVAL(zkz)*1.e4, & |
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| 530 | & 'max= ', MAXVAL(zkz)*1.e4, ' cm2/s' |
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| 531 | END DO |
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[5836] | 532 | !!gm end bug mpp |
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[1418] | 533 | ! |
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| 534 | ENDIF |
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[2528] | 535 | ! |
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[3294] | 536 | CALL wrk_dealloc( jpi,jpj, zem2, zek1, zkz, zfact, zhdep ) |
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| 537 | CALL wrk_dealloc( jpi,jpj,jpk, zpc ) |
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[2715] | 538 | ! |
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[3294] | 539 | IF( nn_timing == 1 ) CALL timing_stop('zdf_tmx_init') |
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| 540 | ! |
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[1418] | 541 | END SUBROUTINE zdf_tmx_init |
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| 542 | |
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| 543 | #else |
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| 544 | !!---------------------------------------------------------------------- |
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| 545 | !! Default option Dummy module NO Tidal MiXing |
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| 546 | !!---------------------------------------------------------------------- |
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| 547 | LOGICAL, PUBLIC, PARAMETER :: lk_zdftmx = .FALSE. !: tidal mixing flag |
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| 548 | CONTAINS |
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[2528] | 549 | SUBROUTINE zdf_tmx_init ! Dummy routine |
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| 550 | WRITE(*,*) 'zdf_tmx: You should not have seen this print! error?' |
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| 551 | END SUBROUTINE zdf_tmx_init |
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| 552 | SUBROUTINE zdf_tmx( kt ) ! Dummy routine |
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[1418] | 553 | WRITE(*,*) 'zdf_tmx: You should not have seen this print! error?', kt |
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| 554 | END SUBROUTINE zdf_tmx |
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| 555 | #endif |
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| 556 | |
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| 557 | !!====================================================================== |
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| 558 | END MODULE zdftmx |
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