| 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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| 8 | !! 3.3 ! 2010-10 (C. Ethe, G. Madec) reorganisation of initialisation phase |
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| 9 | !!---------------------------------------------------------------------- |
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| 10 | !!---------------------------------------------------------------------- |
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| 11 | !! 'key_zdftmx' Tidal vertical mixing |
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| 12 | !!---------------------------------------------------------------------- |
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| 13 | !! zdf_tmx : global momentum & tracer Kz with tidal induced Kz |
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| 14 | !! tmx_itf : Indonesian momentum & tracer Kz with tidal induced Kz |
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| 15 | !!---------------------------------------------------------------------- |
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| 16 | USE oce ! ocean dynamics and tracers variables |
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| 17 | USE dom_oce ! ocean space and time domain variables |
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| 18 | USE zdf_oce ! ocean vertical physics variables |
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| 19 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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| 20 | USE eosbn2 ! ocean equation of state |
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| 21 | USE phycst ! physical constants |
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| 22 | USE prtctl ! Print control |
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| 23 | USE in_out_manager ! I/O manager |
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| 24 | USE iom ! I/O Manager |
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| 25 | USE lib_mpp ! MPP library |
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| 26 | USE timing ! Timing |
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| 27 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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| 28 | |
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| 29 | IMPLICIT NONE |
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| 30 | PRIVATE |
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| 31 | |
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| 32 | PUBLIC zdf_tmx ! called in step module |
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| 33 | PUBLIC zdf_tmx_init ! called in opa module |
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| 34 | PUBLIC zdf_tmx_alloc ! called in nemogcm module |
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| 35 | |
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| 36 | LOGICAL, PUBLIC, PARAMETER :: lk_zdftmx = .TRUE. !: tidal mixing flag |
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| 37 | |
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| 38 | ! !!* Namelist namzdf_tmx : tidal mixing * |
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| 39 | REAL(wp) :: rn_htmx ! vertical decay scale for turbulence (meters) |
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| 40 | REAL(wp) :: rn_n2min ! threshold of the Brunt-Vaisala frequency (s-1) |
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| 41 | REAL(wp) :: rn_tfe ! tidal dissipation efficiency (St Laurent et al. 2002) |
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| 42 | REAL(wp) :: rn_me ! mixing efficiency (Osborn 1980) |
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| 43 | LOGICAL :: ln_tmx_itf ! Indonesian Through Flow (ITF): Koch-Larrouy et al. (2007) parameterization |
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| 44 | REAL(wp) :: rn_tfe_itf ! ITF tidal dissipation efficiency (St Laurent et al. 2002) |
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| 45 | |
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| 46 | REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: en_tmx ! energy available for tidal mixing (W/m2) |
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| 47 | REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: mask_itf ! mask to use over Indonesian area |
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| 48 | REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: az_tmx ! coefficient used to evaluate the tidal induced Kz |
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| 49 | |
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| 50 | !! * Substitutions |
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| 51 | # include "vectopt_loop_substitute.h90" |
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| 52 | !!---------------------------------------------------------------------- |
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| 53 | !! NEMO/OPA 4.0 , NEMO Consortium (2011) |
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| 54 | !! $Id: zdftmx.F90 8788 2017-11-22 18:01:02Z davestorkey $ |
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| 55 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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| 56 | !!---------------------------------------------------------------------- |
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| 57 | CONTAINS |
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| 58 | |
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| 59 | INTEGER FUNCTION zdf_tmx_alloc() |
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| 60 | !!---------------------------------------------------------------------- |
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| 61 | !! *** FUNCTION zdf_tmx_alloc *** |
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| 62 | !!---------------------------------------------------------------------- |
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| 63 | ALLOCATE(en_tmx(jpi,jpj), mask_itf(jpi,jpj), az_tmx(jpi,jpj,jpk), STAT=zdf_tmx_alloc ) |
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| 64 | ! |
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| 65 | IF( lk_mpp ) CALL mpp_sum ('zdftmx', zdf_tmx_alloc ) |
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| 66 | IF( zdf_tmx_alloc /= 0 ) CALL ctl_warn('zdf_tmx_alloc: failed to allocate arrays') |
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| 67 | END FUNCTION zdf_tmx_alloc |
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| 68 | |
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| 69 | |
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| 70 | SUBROUTINE zdf_tmx( kt, p_avm, p_avt, p_avs) |
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| 71 | !!---------------------------------------------------------------------- |
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| 72 | !! *** ROUTINE zdf_tmx *** |
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| 73 | !! |
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| 74 | !! ** Purpose : add to the vertical mixing coefficients the effect of |
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| 75 | !! tidal mixing (Simmons et al 2004). |
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| 76 | !! |
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| 77 | !! ** Method : - tidal-induced vertical mixing is given by: |
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| 78 | !! Kz_tides = az_tmx / max( rn_n2min, N^2 ) |
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| 79 | !! where az_tmx is a coefficient that specified the 3D space |
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| 80 | !! distribution of the faction of tidal energy taht is used |
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| 81 | !! for mixing. Its expression is set in zdf_tmx_init routine, |
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| 82 | !! following Simmons et al. 2004. |
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| 83 | !! NB: a specific bounding procedure is performed on av_tide |
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| 84 | !! so that the input tidal energy is actually almost used. The |
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| 85 | !! basic maximum value is 60 cm2/s, but values of 300 cm2/s |
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| 86 | !! can be reached in area where bottom stratification is too |
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| 87 | !! weak. |
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| 88 | !! |
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| 89 | !! - update av_tide in the Indonesian Through Flow area |
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| 90 | !! following Koch-Larrouy et al. (2007) parameterisation |
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| 91 | !! (see tmx_itf routine). |
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| 92 | !! |
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| 93 | !! - update the model vertical eddy viscosity and diffusivity: |
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| 94 | !! avt = avt + av_tides |
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| 95 | !! avm = avm + av_tides |
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| 96 | !! |
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| 97 | !! ** Action : avt, avm increased by tidal mixing |
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| 98 | !! |
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| 99 | !! References : Simmons et al. 2004, Ocean Modelling, 6, 3-4, 245-263. |
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| 100 | !! Koch-Larrouy et al. 2007, GRL. |
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| 101 | !!---------------------------------------------------------------------- |
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| 102 | INTEGER, INTENT(in) :: kt ! ocean time-step |
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| 103 | REAL(wp), DIMENSION(:,:,:) , INTENT(inout) :: p_avm ! momentum Kz (w-points) |
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| 104 | REAL(wp), DIMENSION(:,:,:) , INTENT(inout) :: p_avt, p_avs ! tracer Kz (w-points) |
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| 105 | !! |
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| 106 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 107 | REAL(wp) :: ztpc ! scalar workspace |
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| 108 | REAL(wp), DIMENSION(jpi,jpj) :: zkz |
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| 109 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zav_tide |
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| 110 | !!---------------------------------------------------------------------- |
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| 111 | ! |
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| 112 | ! ! ----------------------- ! |
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| 113 | ! ! Standard tidal mixing ! (compute zav_tide) |
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| 114 | ! ! ----------------------- ! |
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| 115 | ! !* First estimation (with n2 bound by rn_n2min) bounded by 60 cm2/s |
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| 116 | zav_tide(:,:,:) = MIN( 60.e-4, az_tmx(:,:,:) / MAX( rn_n2min, rn2(:,:,:) ) ) |
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| 117 | |
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| 118 | zkz(:,:) = 0.e0 !* Associated potential energy consummed over the whole water column |
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| 119 | DO jk = 2, jpkm1 |
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| 120 | zkz(:,:) = zkz(:,:) + e3w_n(:,:,jk) * MAX( 0.e0, rn2(:,:,jk) ) * rau0 * zav_tide(:,:,jk) * wmask(:,:,jk) |
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| 121 | END DO |
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| 122 | |
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| 123 | 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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| 124 | DO ji = 1, jpi |
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| 125 | IF( zkz(ji,jj) /= 0.e0 ) zkz(ji,jj) = en_tmx(ji,jj) / zkz(ji,jj) |
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| 126 | END DO |
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| 127 | END DO |
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| 128 | |
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| 129 | 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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| 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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| 131 | DO ji = 1, jpi |
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| 132 | zav_tide(ji,jj,jk) = zav_tide(ji,jj,jk) * MIN( zkz(ji,jj), 30./6. ) * wmask(ji,jj,jk) !kz max = 300 cm2/s |
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| 133 | END DO |
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| 134 | END DO |
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| 135 | END DO |
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| 136 | |
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| 137 | IF( kt == nit000 ) THEN !* check at first time-step: diagnose the energy consumed by zav_tide |
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| 138 | ztpc = 0.e0 |
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| 139 | DO jk= 1, jpk |
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| 140 | DO jj= 1, jpj |
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| 141 | DO ji= 1, jpi |
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| 142 | ztpc = ztpc + e3w_n(ji,jj,jk) * e1t(ji,jj) * e2t(ji,jj) & |
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| 143 | & * MAX( 0.e0, rn2(ji,jj,jk) ) * zav_tide(ji,jj,jk) * tmask(ji,jj,jk) * tmask_i(ji,jj) |
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| 144 | END DO |
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| 145 | END DO |
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| 146 | END DO |
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| 147 | ztpc= rau0 / ( rn_tfe * rn_me ) * ztpc |
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| 148 | IF(lwp) WRITE(numout,*) |
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| 149 | IF(lwp) WRITE(numout,*) ' N Total power consumption by av_tide : ztpc = ', ztpc * 1.e-12 ,'TW' |
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| 150 | ENDIF |
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| 151 | |
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| 152 | ! ! ----------------------- ! |
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| 153 | ! ! ITF tidal mixing ! (update zav_tide) |
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| 154 | ! ! ----------------------- ! |
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| 155 | IF( ln_tmx_itf ) CALL tmx_itf( kt, zav_tide ) |
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| 156 | |
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| 157 | ! ! ----------------------- ! |
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| 158 | ! ! Update mixing coefs ! |
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| 159 | ! ! ----------------------- ! |
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| 160 | DO jk = 2, jpkm1 !* update momentum & tracer diffusivity with tidal mixing |
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| 161 | 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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| 162 | DO ji = 1, jpi |
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| 163 | p_avt(ji,jj,jk) = p_avt(ji,jj,jk) + zav_tide(ji,jj,jk) * wmask(ji,jj,jk) |
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| 164 | p_avs(ji,jj,jk) = p_avs(ji,jj,jk) + zav_tide(ji,jj,jk) * wmask(ji,jj,jk) |
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| 165 | p_avm(ji,jj,jk) = p_avm(ji,jj,jk) + zav_tide(ji,jj,jk) * wmask(ji,jj,jk) |
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| 166 | END DO |
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| 167 | END DO |
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| 168 | END DO |
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| 169 | |
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| 170 | ! !* output tidal mixing coefficient |
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| 171 | CALL iom_put( "av_tmx", zav_tide ) |
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| 172 | |
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| 173 | IF(ln_ctl) CALL prt_ctl(tab3d_1=zav_tide , clinfo1=' tmx - av_tide: ', tab3d_2=p_avt, clinfo2=' p_avt: ', kdim=jpk) |
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| 174 | ! |
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| 175 | END SUBROUTINE zdf_tmx |
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| 176 | |
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| 177 | |
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| 178 | SUBROUTINE tmx_itf( kt, pav ) |
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| 179 | !!---------------------------------------------------------------------- |
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| 180 | !! *** ROUTINE tmx_itf *** |
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| 181 | !! |
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| 182 | !! ** Purpose : modify the vertical eddy diffusivity coefficients |
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| 183 | !! (pav) in the Indonesian Through Flow area (ITF). |
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| 184 | !! |
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| 185 | !! ** Method : - Following Koch-Larrouy et al. (2007), in the ITF defined |
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| 186 | !! by msk_itf (read in a file, see tmx_init), the tidal |
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| 187 | !! mixing coefficient is computed with : |
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| 188 | !! * q=1 (i.e. all the tidal energy remains trapped in |
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| 189 | !! the area and thus is used for mixing) |
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| 190 | !! * the vertical distribution of the tifal energy is a |
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| 191 | !! proportional to N above the thermocline (d(N^2)/dz > 0) |
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| 192 | !! and to N^2 below the thermocline (d(N^2)/dz < 0) |
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| 193 | !! |
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| 194 | !! ** Action : av_tide updated in the ITF area (msk_itf) |
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| 195 | !! |
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| 196 | !! References : Koch-Larrouy et al. 2007, GRL |
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| 197 | !!---------------------------------------------------------------------- |
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| 198 | INTEGER , INTENT(in ) :: kt ! ocean time-step |
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| 199 | REAL(wp), INTENT(inout), DIMENSION(jpi,jpj,jpk) :: pav ! Tidal mixing coef. |
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| 200 | !! |
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| 201 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 202 | REAL(wp) :: zcoef, ztpc ! temporary scalar |
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| 203 | REAL(wp), DIMENSION(jpi,jpj) :: zkz ! 2D workspace |
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| 204 | REAL(wp), DIMENSION(jpi,jpj) :: zsum1 , zsum2 , zsum ! - - |
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| 205 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zempba_3d_1, zempba_3d_2 ! 3D workspace |
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| 206 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zempba_3d , zdn2dz ! - - |
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| 207 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zavt_itf ! - - |
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| 208 | !!---------------------------------------------------------------------- |
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| 209 | ! |
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| 210 | ! ! compute the form function using N2 at each time step |
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| 211 | zdn2dz (:,:,jpk) = 0.e0 |
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| 212 | zempba_3d_1(:,:,jpk) = 0.e0 |
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| 213 | zempba_3d_2(:,:,jpk) = 0.e0 |
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| 214 | DO jk = 1, jpkm1 |
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| 215 | zdn2dz (:,:,jk) = rn2(:,:,jk) - rn2(:,:,jk+1) ! Vertical profile of dN2/dz |
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| 216 | !CDIR NOVERRCHK |
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| 217 | zempba_3d_1(:,:,jk) = SQRT( MAX( 0.e0, rn2(:,:,jk) ) ) ! - - of N |
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| 218 | zempba_3d_2(:,:,jk) = MAX( 0.e0, rn2(:,:,jk) ) ! - - of N^2 |
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| 219 | END DO |
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| 220 | ! |
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| 221 | zsum (:,:) = 0.e0 |
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| 222 | zsum1(:,:) = 0.e0 |
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| 223 | zsum2(:,:) = 0.e0 |
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| 224 | DO jk= 2, jpk |
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| 225 | zsum1(:,:) = zsum1(:,:) + zempba_3d_1(:,:,jk) * e3w_n(:,:,jk) * tmask(:,:,jk) * tmask(:,:,jk-1) |
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| 226 | zsum2(:,:) = zsum2(:,:) + zempba_3d_2(:,:,jk) * e3w_n(:,:,jk) * tmask(:,:,jk) * tmask(:,:,jk-1) |
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| 227 | END DO |
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| 228 | DO jj = 1, jpj |
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| 229 | DO ji = 1, jpi |
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| 230 | IF( zsum1(ji,jj) /= 0.e0 ) zsum1(ji,jj) = 1.e0 / zsum1(ji,jj) |
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| 231 | IF( zsum2(ji,jj) /= 0.e0 ) zsum2(ji,jj) = 1.e0 / zsum2(ji,jj) |
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| 232 | END DO |
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| 233 | END DO |
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| 234 | |
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| 235 | DO jk= 1, jpk |
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| 236 | DO jj = 1, jpj |
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| 237 | DO ji = 1, jpi |
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| 238 | zcoef = 0.5 - SIGN( 0.5, zdn2dz(ji,jj,jk) ) ! =0 if dN2/dz > 0, =1 otherwise |
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| 239 | ztpc = zempba_3d_1(ji,jj,jk) * zsum1(ji,jj) * zcoef & |
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| 240 | & + zempba_3d_2(ji,jj,jk) * zsum2(ji,jj) * ( 1. - zcoef ) |
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| 241 | ! |
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| 242 | zempba_3d(ji,jj,jk) = ztpc |
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| 243 | zsum (ji,jj) = zsum(ji,jj) + ztpc * e3w_n(ji,jj,jk) |
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| 244 | END DO |
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| 245 | END DO |
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| 246 | END DO |
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| 247 | DO jj = 1, jpj |
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| 248 | DO ji = 1, jpi |
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| 249 | IF( zsum(ji,jj) > 0.e0 ) zsum(ji,jj) = 1.e0 / zsum(ji,jj) |
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| 250 | END DO |
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| 251 | END DO |
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| 252 | |
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| 253 | ! ! first estimation bounded by 10 cm2/s (with n2 bounded by rn_n2min) |
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| 254 | zcoef = rn_tfe_itf / ( rn_tfe * rau0 ) |
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| 255 | DO jk = 1, jpk |
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| 256 | zavt_itf(:,:,jk) = MIN( 10.e-4, zcoef * en_tmx(:,:) * zsum(:,:) * zempba_3d(:,:,jk) & |
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| 257 | & / MAX( rn_n2min, rn2(:,:,jk) ) * tmask(:,:,jk) ) |
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| 258 | END DO |
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| 259 | |
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| 260 | zkz(:,:) = 0.e0 ! Associated potential energy consummed over the whole water column |
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| 261 | DO jk = 2, jpkm1 |
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| 262 | zkz(:,:) = zkz(:,:) + e3w_n(:,:,jk) * MAX( 0.e0, rn2(:,:,jk) ) * rau0 * zavt_itf(:,:,jk) * tmask(:,:,jk) * tmask(:,:,jk-1) |
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| 263 | END DO |
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| 264 | |
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| 265 | 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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| 266 | DO ji = 1, jpi |
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| 267 | 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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| 268 | END DO |
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| 269 | END DO |
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| 270 | |
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| 271 | 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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| 272 | zavt_itf(:,:,jk) = zavt_itf(:,:,jk) * MIN( zkz(:,:), 120./10. ) * tmask(:,:,jk) * tmask(:,:,jk-1) ! kz max = 120 cm2/s |
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| 273 | END DO |
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| 274 | |
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| 275 | IF( kt == nit000 ) THEN ! diagnose the nergy consumed by zavt_itf |
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| 276 | ztpc = 0.e0 |
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| 277 | DO jk= 1, jpk |
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| 278 | DO jj= 1, jpj |
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| 279 | DO ji= 1, jpi |
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| 280 | ztpc = ztpc + e1t(ji,jj) * e2t(ji,jj) * e3w_n(ji,jj,jk) * MAX( 0.e0, rn2(ji,jj,jk) ) & |
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| 281 | & * zavt_itf(ji,jj,jk) * tmask(ji,jj,jk) * tmask_i(ji,jj) |
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| 282 | END DO |
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| 283 | END DO |
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| 284 | END DO |
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| 285 | ztpc= rau0 * ztpc / ( rn_me * rn_tfe_itf ) |
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| 286 | IF(lwp) WRITE(numout,*) ' N Total power consumption by zavt_itf: ztpc = ', ztpc * 1.e-12 ,'TW' |
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| 287 | ENDIF |
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| 288 | |
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| 289 | ! ! Update pav with the ITF mixing coefficient |
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| 290 | DO jk = 2, jpkm1 |
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| 291 | pav(:,:,jk) = pav (:,:,jk) * ( 1.e0 - mask_itf(:,:) ) & |
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| 292 | & + zavt_itf(:,:,jk) * mask_itf(:,:) |
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| 293 | END DO |
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| 294 | ! |
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| 295 | END SUBROUTINE tmx_itf |
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| 296 | |
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| 297 | |
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| 298 | SUBROUTINE zdf_tmx_init |
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| 299 | !!---------------------------------------------------------------------- |
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| 300 | !! *** ROUTINE zdf_tmx_init *** |
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| 301 | !! |
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| 302 | !! ** Purpose : Initialization of the vertical tidal mixing, Reading |
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| 303 | !! of M2 and K1 tidal energy in nc files |
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| 304 | !! |
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| 305 | !! ** Method : - Read the namtmx namelist and check the parameters |
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| 306 | !! |
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| 307 | !! - Read the input data in NetCDF files : |
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| 308 | !! M2 and K1 tidal energy. The total tidal energy, en_tmx, |
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| 309 | !! is the sum of M2, K1 and S2 energy where S2 is assumed |
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| 310 | !! to be: S2=(1/2)^2 * M2 |
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| 311 | !! mask_itf, a mask array that determine where substituing |
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| 312 | !! the standard Simmons et al. (2005) formulation with the |
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| 313 | !! one of Koch_Larrouy et al. (2007). |
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| 314 | !! |
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| 315 | !! - Compute az_tmx, a 3D coefficient that allows to compute |
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| 316 | !! the standard tidal-induced vertical mixing as follows: |
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| 317 | !! Kz_tides = az_tmx / max( rn_n2min, N^2 ) |
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| 318 | !! with az_tmx a bottom intensified coefficient is given by: |
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| 319 | !! az_tmx(z) = en_tmx / ( rau0 * rn_htmx ) * EXP( -(H-z)/rn_htmx ) |
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| 320 | !! / ( 1. - EXP( - H /rn_htmx ) ) |
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| 321 | !! where rn_htmx the characteristic length scale of the bottom |
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| 322 | !! intensification, en_tmx the tidal energy, and H the ocean depth |
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| 323 | !! |
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| 324 | !! ** input : - Namlist namtmx |
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| 325 | !! - NetCDF file : M2_ORCA2.nc, K1_ORCA2.nc, and mask_itf.nc |
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| 326 | !! |
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| 327 | !! ** Action : - Increase by 1 the nstop flag is setting problem encounter |
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| 328 | !! - defined az_tmx used to compute tidal-induced mixing |
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| 329 | !! |
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| 330 | !! References : Simmons et al. 2004, Ocean Modelling, 6, 3-4, 245-263. |
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| 331 | !! Koch-Larrouy et al. 2007, GRL. |
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| 332 | !!---------------------------------------------------------------------- |
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| 333 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 334 | INTEGER :: inum ! local integer |
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| 335 | INTEGER :: ios |
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| 336 | REAL(wp) :: ztpc, ze_z ! local scalars |
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| 337 | REAL(wp), DIMENSION(jpi,jpj) :: zem2, zek1 ! read M2 and K1 tidal energy |
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| 338 | REAL(wp), DIMENSION(jpi,jpj) :: zkz ! total M2, K1 and S2 tidal energy |
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| 339 | REAL(wp), DIMENSION(jpi,jpj) :: zfact ! used for vertical structure function |
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| 340 | REAL(wp), DIMENSION(jpi,jpj) :: zhdep ! Ocean depth |
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| 341 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zpc ! power consumption |
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| 342 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zav_tide ! tidal mixing coefficient |
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| 343 | !! |
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| 344 | NAMELIST/namzdf_tmx/ rn_htmx, rn_n2min, rn_tfe, rn_me, ln_tmx_itf, rn_tfe_itf |
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| 345 | !!---------------------------------------------------------------------- |
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| 346 | ! |
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| 347 | |
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| 348 | REWIND( numnam_ref ) ! Namelist namzdf_tmx in reference namelist : Tidal Mixing |
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| 349 | READ ( numnam_ref, namzdf_tmx, IOSTAT = ios, ERR = 901) |
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| 350 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namzdf_tmx in reference namelist' ) |
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| 351 | |
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| 352 | REWIND( numnam_cfg ) ! Namelist namzdf_tmx in configuration namelist : Tidal Mixing |
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| 353 | READ ( numnam_cfg, namzdf_tmx, IOSTAT = ios, ERR = 902 ) |
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| 354 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namzdf_tmx in configuration namelist' ) |
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| 355 | IF(lwm) WRITE ( numond, namzdf_tmx ) |
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| 356 | |
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| 357 | IF(lwp) THEN ! Control print |
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| 358 | WRITE(numout,*) |
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| 359 | WRITE(numout,*) 'zdf_tmx_init : tidal mixing' |
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| 360 | WRITE(numout,*) '~~~~~~~~~~~~' |
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| 361 | WRITE(numout,*) ' Namelist namzdf_tmx : set tidal mixing parameters' |
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| 362 | WRITE(numout,*) ' Vertical decay scale for turbulence = ', rn_htmx |
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| 363 | WRITE(numout,*) ' Brunt-Vaisala frequency threshold = ', rn_n2min |
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| 364 | WRITE(numout,*) ' Tidal dissipation efficiency = ', rn_tfe |
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| 365 | WRITE(numout,*) ' Mixing efficiency = ', rn_me |
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| 366 | WRITE(numout,*) ' ITF specific parameterisation = ', ln_tmx_itf |
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| 367 | WRITE(numout,*) ' ITF tidal dissipation efficiency = ', rn_tfe_itf |
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| 368 | ENDIF |
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| 369 | |
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| 370 | ! ! allocate tmx arrays |
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| 371 | IF( zdf_tmx_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'zdf_tmx_init : unable to allocate tmx arrays' ) |
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| 372 | |
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| 373 | IF( ln_tmx_itf ) THEN ! read the Indonesian Through Flow mask |
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| 374 | CALL iom_open('mask_itf',inum) |
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| 375 | CALL iom_get (inum, jpdom_data, 'tmaskitf',mask_itf,1) ! |
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| 376 | CALL iom_close(inum) |
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| 377 | ENDIF |
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| 378 | |
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| 379 | ! read M2 tidal energy flux : W/m2 ( zem2 < 0 ) |
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| 380 | CALL iom_open('M2rowdrg',inum) |
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| 381 | CALL iom_get (inum, jpdom_data, 'field',zem2,1) ! |
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| 382 | CALL iom_close(inum) |
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| 383 | |
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| 384 | ! read K1 tidal energy flux : W/m2 ( zek1 < 0 ) |
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| 385 | CALL iom_open('K1rowdrg',inum) |
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| 386 | CALL iom_get (inum, jpdom_data, 'field',zek1,1) ! |
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| 387 | CALL iom_close(inum) |
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| 388 | |
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| 389 | ! Total tidal energy ( M2, S2 and K1 with S2=(1/2)^2 * M2 ) |
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| 390 | ! only the energy available for mixing is taken into account, |
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| 391 | ! (mixing efficiency tidal dissipation efficiency) |
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| 392 | en_tmx(:,:) = - rn_tfe * rn_me * ( zem2(:,:) * 1.25 + zek1(:,:) ) * ssmask(:,:) |
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| 393 | |
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| 394 | !============ |
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| 395 | !TG: Bug for VVL? Should this section be moved out of _init and be updated at every timestep? |
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| 396 | ! Vertical structure (az_tmx) |
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| 397 | DO jj = 1, jpj ! part independent of the level |
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| 398 | DO ji = 1, jpi |
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| 399 | zhdep(ji,jj) = gdepw_0(ji,jj,mbkt(ji,jj)+1) ! depth of the ocean |
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| 400 | zfact(ji,jj) = rau0 * rn_htmx * ( 1. - EXP( -zhdep(ji,jj) / rn_htmx ) ) |
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| 401 | IF( zfact(ji,jj) /= 0 ) zfact(ji,jj) = en_tmx(ji,jj) / zfact(ji,jj) |
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| 402 | END DO |
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| 403 | END DO |
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| 404 | DO jk= 1, jpk ! complete with the level-dependent part |
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| 405 | DO jj = 1, jpj |
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| 406 | DO ji = 1, jpi |
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| 407 | 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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| 408 | END DO |
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| 409 | END DO |
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| 410 | END DO |
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| 411 | !=========== |
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| 412 | |
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| 413 | IF( nprint == 1 .AND. lwp ) THEN |
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| 414 | ! Control print |
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| 415 | ! Total power consumption due to vertical mixing |
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| 416 | ! zpc = rau0 * 1/rn_me * rn2 * zav_tide |
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| 417 | zav_tide(:,:,:) = 0.e0 |
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| 418 | DO jk = 2, jpkm1 |
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| 419 | zav_tide(:,:,jk) = az_tmx(:,:,jk) / MAX( rn_n2min, rn2(:,:,jk) ) |
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| 420 | END DO |
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| 421 | |
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| 422 | ztpc = 0.e0 |
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| 423 | zpc(:,:,:) = MAX(rn_n2min,rn2(:,:,:)) * zav_tide(:,:,:) |
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| 424 | DO jk= 2, jpkm1 |
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| 425 | DO jj = 1, jpj |
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| 426 | DO ji = 1, jpi |
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| 427 | ztpc = ztpc + e3w_0(ji,jj,jk) * e1t(ji,jj) * e2t(ji,jj) * zpc(ji,jj,jk) * wmask(ji,jj,jk) * tmask_i(ji,jj) |
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| 428 | END DO |
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| 429 | END DO |
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| 430 | END DO |
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| 431 | ztpc= rau0 * 1/(rn_tfe * rn_me) * ztpc |
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| 432 | |
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| 433 | WRITE(numout,*) |
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| 434 | WRITE(numout,*) ' Total power consumption of the tidally driven part of Kz : ztpc = ', ztpc * 1.e-12 ,'TW' |
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| 435 | |
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| 436 | |
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| 437 | ! control print 2 |
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| 438 | zav_tide(:,:,:) = MIN( zav_tide(:,:,:), 60.e-4 ) |
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| 439 | zkz(:,:) = 0.e0 |
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| 440 | DO jk = 2, jpkm1 |
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| 441 | DO jj = 1, jpj |
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| 442 | DO ji = 1, jpi |
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| 443 | zkz(ji,jj) = zkz(ji,jj) + e3w_0(ji,jj,jk) * MAX(0.e0, rn2(ji,jj,jk)) * rau0 * zav_tide(ji,jj,jk) * wmask(ji,jj,jk) |
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| 444 | END DO |
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| 445 | END DO |
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| 446 | END DO |
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| 447 | ! Here zkz should be equal to en_tmx ==> multiply by en_tmx/zkz |
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| 448 | DO jj = 1, jpj |
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| 449 | DO ji = 1, jpi |
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| 450 | IF( zkz(ji,jj) /= 0.e0 ) THEN |
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| 451 | zkz(ji,jj) = en_tmx(ji,jj) / zkz(ji,jj) |
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| 452 | ENDIF |
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| 453 | END DO |
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| 454 | END DO |
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| 455 | ztpc = 1.e50 |
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| 456 | DO jj = 1, jpj |
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| 457 | DO ji = 1, jpi |
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| 458 | IF( zkz(ji,jj) /= 0.e0 ) THEN |
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| 459 | ztpc = Min( zkz(ji,jj), ztpc) |
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| 460 | ENDIF |
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| 461 | END DO |
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| 462 | END DO |
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| 463 | WRITE(numout,*) ' Min de zkz ', ztpc, ' Max = ', maxval(zkz(:,:) ) |
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| 464 | |
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| 465 | DO jk = 2, jpkm1 |
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| 466 | DO jj = 1, jpj |
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| 467 | DO ji = 1, jpi |
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| 468 | zav_tide(ji,jj,jk) = zav_tide(ji,jj,jk) * MIN( zkz(ji,jj), 30./6. ) * wmask(ji,jj,jk) !kz max = 300 cm2/s |
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| 469 | END DO |
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| 470 | END DO |
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| 471 | END DO |
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| 472 | ztpc = 0.e0 |
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| 473 | zpc(:,:,:) = Max(0.e0,rn2(:,:,:)) * zav_tide(:,:,:) |
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| 474 | DO jk= 1, jpk |
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| 475 | DO jj = 1, jpj |
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| 476 | DO ji = 1, jpi |
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| 477 | ztpc = ztpc + e3w_0(ji,jj,jk) * e1t(ji,jj) * e2t(ji,jj) * zpc(ji,jj,jk) * wmask(ji,jj,jk) * tmask_i(ji,jj) |
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| 478 | END DO |
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| 479 | END DO |
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| 480 | END DO |
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| 481 | ztpc= rau0 * 1/(rn_tfe * rn_me) * ztpc |
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| 482 | WRITE(numout,*) ' 2 Total power consumption of the tidally driven part of Kz : ztpc = ', ztpc * 1.e-12 ,'TW' |
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| 483 | |
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| 484 | DO jk = 1, jpk |
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| 485 | ze_z = SUM( e1t(:,:) * e2t(:,:) * zav_tide(:,:,jk) * tmask_i(:,:) ) & |
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| 486 | & / MAX( 1.e-20, SUM( e1t(:,:) * e2t(:,:) * wmask (:,:,jk) * tmask_i(:,:) ) ) |
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| 487 | ztpc = 1.E50 |
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| 488 | DO jj = 1, jpj |
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| 489 | DO ji = 1, jpi |
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| 490 | IF( zav_tide(ji,jj,jk) /= 0.e0 ) ztpc =Min( ztpc, zav_tide(ji,jj,jk) ) |
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| 491 | END DO |
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| 492 | END DO |
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| 493 | WRITE(numout,*) ' N2 min - jk= ', jk,' ', ze_z * 1.e4,' cm2/s min= ',ztpc*1.e4, & |
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| 494 | & 'max= ', MAXVAL(zav_tide(:,:,jk) )*1.e4, ' cm2/s' |
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| 495 | END DO |
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| 496 | |
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| 497 | WRITE(numout,*) ' e_tide : ', SUM( e1t*e2t*en_tmx ) / ( rn_tfe * rn_me ) * 1.e-12, 'TW' |
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| 498 | WRITE(numout,*) |
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| 499 | WRITE(numout,*) ' Initial profile of tidal vertical mixing' |
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| 500 | DO jk = 1, jpk |
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| 501 | DO jj = 1,jpj |
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| 502 | DO ji = 1,jpi |
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| 503 | zkz(ji,jj) = az_tmx(ji,jj,jk) /MAX( rn_n2min, rn2(ji,jj,jk) ) |
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| 504 | END DO |
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| 505 | END DO |
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| 506 | ze_z = SUM( e1t(:,:) * e2t(:,:) * zkz(:,:) * tmask_i(:,:) ) & |
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| 507 | & / MAX( 1.e-20, SUM( e1t(:,:) * e2t(:,:) * wmask (:,:,jk) * tmask_i(:,:) ) ) |
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| 508 | WRITE(numout,*) ' jk= ', jk,' ', ze_z * 1.e4,' cm2/s' |
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| 509 | END DO |
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| 510 | DO jk = 1, jpk |
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| 511 | zkz(:,:) = az_tmx(:,:,jk) /rn_n2min |
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| 512 | ze_z = SUM( e1t(:,:) * e2t(:,:) * zkz(:,:) * tmask_i(:,:) ) & |
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| 513 | & / MAX( 1.e-20, SUM( e1t(:,:) * e2t(:,:) * wmask (:,:,jk) * tmask_i(:,:) ) ) |
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| 514 | WRITE(numout,*) |
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| 515 | WRITE(numout,*) ' N2 min - jk= ', jk,' ', ze_z * 1.e4,' cm2/s min= ',MINVAL(zkz)*1.e4, & |
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| 516 | & 'max= ', MAXVAL(zkz)*1.e4, ' cm2/s' |
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| 517 | END DO |
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| 518 | ! |
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| 519 | ENDIF |
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| 520 | ! |
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| 521 | END SUBROUTINE zdf_tmx_init |
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| 522 | |
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| 523 | !!====================================================================== |
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| 524 | END MODULE zdftmx |
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