Changeset 1496
- Timestamp:
- 2009-07-20T16:23:15+02:00 (15 years ago)
- File:
-
- 1 edited
-
trunk/NEMO/OPA_SRC/ZDF/zdftmx.F90 (modified) (11 diffs)
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trunk/NEMO/OPA_SRC/ZDF/zdftmx.F90
r1495 r1496 17 17 USE dom_oce ! ocean space and time domain variables 18 18 USE zdf_oce ! ocean vertical physics variables 19 USE in_out_manager ! I/O manager20 19 USE lbclnk ! ocean lateral boundary conditions (or mpp link) 21 20 USE eosbn2 ! ocean equation of state 22 21 USE phycst ! physical constants 23 22 USE prtctl ! Print control 23 USE in_out_manager ! I/O manager 24 USE iom ! I/O Manager 24 25 25 26 IMPLICIT NONE … … 30 31 LOGICAL, PUBLIC, PARAMETER :: lk_zdftmx = .TRUE. !: tidal mixing flag 31 32 32 ! !!* Namelist namtmx *33 ! !!* Namelist namtmx : tidal mixing * 33 34 REAL(wp) :: rn_htmx = 500. ! vertical decay scale for turbulence (meters) 34 35 REAL(wp) :: rn_n2min = 1.e-8 ! threshold of the Brunt-Vaisala frequency (s-1) … … 58 59 !! 59 60 !! ** Purpose : add to the vertical mixing coefficients the effect of 60 !! tidal mixing (Simmons et al 2004).61 !! tidal mixing (Simmons et al 2004). 61 62 !! 62 63 !! ** Method : - tidal-induced vertical mixing is given by: 63 !! Kz_tides = az_tmx / rn2, where az_tmx is a 2D coefficient set in 64 !! zdf_tmx_init. This mixing is added to avt, avmu and avmv as 65 !! follows: avt = avt + az_tmx 66 !! avmu = avmu + mi(az_tmx) 67 !! avmv = avmv + mj(az_tmx) 68 !! 69 !! ** Action : Update avt, avmu and avmv 64 !! Kz_tides = az_tmx / max( rn_n2min, N^2 ) 65 !! where az_tmx is a coefficient that specified the 3D space 66 !! distribution of the faction of tidal energy taht is used 67 !! for mixing. Its expression is set in zdf_tmx_init routine, 68 !! following Simmons et al. 2004. 69 !! NB: a specific bounding procedure is performed on av_tide 70 !! so that the input tidal energy is actually almost used. The 71 !! basic maximum value is 60 cm2/s, but values of 300 cm2/s 72 !! can be reached in area where bottom stratification is too 73 !! weak. 74 !! 75 !! - update av_tide in the Indonesian Through Flow area 76 !! following Koch-Larrouy et al. (2007) parameterisation 77 !! (see tmx_itf routine). 78 !! 79 !! - update the model vertical eddy viscosity and diffusivity: 80 !! avt = avt + av_tides 81 !! avmu = avmu + mi(av_tides) 82 !! avmv = avmv + mj(av_tides) 83 !! 84 !! ** Action : avt, avmu, avmv increased by tidal mixing 70 85 !! 71 86 !! References : Simmons et al. 2004, Ocean Modelling, 6, 3-4, 245-263. 72 !! St Laurent et al. 2002, GRL, 29, 2106, 10.1029/2002GL015 633. 73 !! Osborn 1982, JPO, 10, 83-89. 87 !! Koch-Larrouy et al. 2007, GRL. 74 88 !!---------------------------------------------------------------------- 75 89 INTEGER, INTENT(in) :: kt ! ocean time-step … … 80 94 !!---------------------------------------------------------------------- 81 95 82 ! ! Initialization (first time-step only) 83 IF( kt == nit000 ) CALL zdf_tmx_init 84 85 ! ! First estimation (with n2 bound by rn_n2min) bounded by 60 cm2/s 96 ! 97 IF( kt == nit000 ) CALL zdf_tmx_init ! Initialization (first time-step only) 98 99 ! ! ----------------------- ! 100 ! ! Standard tidal mixing ! (compute av_tide) 101 ! ! ----------------------- ! 102 ! !* First estimation (with n2 bound by rn_n2min) bounded by 60 cm2/s 86 103 av_tide(:,:,:) = MIN( 60.e-4, az_tmx(:,:,:) / MAX( rn_n2min, rn2(:,:,:) ) ) 87 104 88 zkz(:,:) = 0.e0 ! Associated potential energy consummed over the whole water column105 zkz(:,:) = 0.e0 !* Associated potential energy consummed over the whole water column 89 106 DO jk = 2, jpkm1 90 107 zkz(:,:) = zkz(:,:) + fse3w(:,:,jk) * MAX( 0.e0, rn2(:,:,jk) ) * rau0 * av_tide(:,:,jk)* tmask(:,:,jk) 91 108 END DO 92 109 93 DO jj = 1, jpj ! Here zkz should be equal to en_tmx ==> multiply by en_tmx/zkz to recover en_tmx110 DO jj = 1, jpj !* Here zkz should be equal to en_tmx ==> multiply by en_tmx/zkz to recover en_tmx 94 111 DO ji = 1, jpi 95 112 IF( zkz(ji,jj) /= 0.e0 ) zkz(ji,jj) = en_tmx(ji,jj) / zkz(ji,jj) … … 97 114 END DO 98 115 99 DO jk = 2, jpkm1 ! Mutiply by zkz to recover en_tmx, BUT bound by 30/6 ==> av_tide bound by 300 cm2/s116 DO jk = 2, jpkm1 !* Mutiply by zkz to recover en_tmx, BUT bound by 30/6 ==> av_tide bound by 300 cm2/s 100 117 av_tide(:,:,jk) = av_tide(:,:,jk) * MIN( zkz(:,:), 30./6. ) !kz max = 300 cm2/s 101 118 END DO 102 119 103 IF( kt == nit000 ) THEN ! diagnose thenergy consumed by av_tide120 IF( kt == nit000 ) THEN !* check at first time-step: diagnose the energy consumed by av_tide 104 121 ztpc = 0.e0 105 122 DO jk= 1, jpk 106 123 DO jj= 1, jpj 107 124 DO ji= 1, jpi 108 ztpc = ztpc + fse3w(ji,jj,jk) *e1t(ji,jj)*e2t(ji,jj) &109 & * MAX(0.e0,rn2(ji,jj,jk))*av_tide(ji,jj,jk)*tmask(ji,jj,jk)*tmask_i(ji,jj)125 ztpc = ztpc + fse3w(ji,jj,jk) * e1t(ji,jj) * e2t(ji,jj) & 126 & * MAX( 0.e0, rn2(ji,jj,jk) ) * av_tide(ji,jj,jk) * tmask(ji,jj,jk) * tmask_i(ji,jj) 110 127 END DO 111 128 END DO … … 113 130 ztpc= rau0 / ( rn_tfe * rn_me ) * ztpc 114 131 IF(lwp) WRITE(numout,*) 115 IF(lwp) WRITE(numout,*) ' N Total power consumption by av_tide : ztpc = ', ztpc * 1.e-12 ,'TW'132 IF(lwp) WRITE(numout,*) ' N Total power consumption by av_tide : ztpc = ', ztpc * 1.e-12 ,'TW' 116 133 ENDIF 117 134 … … 132 149 END DO 133 150 END DO 134 CALL lbc_lnk( avmu, 'U', 1. ) 135 CALL lbc_lnk( avmv, 'V', 1. ) 136 137 CALL tmx_itf( kt ) ! Indonesian throughflow tidal vertical mixing 138 139 IF(ln_ctl) THEN 140 CALL prt_ctl_info( clinfo1='tmx - t: ', ivar1=INT(SUM( avt (:,:,:) ) ) ) 141 CALL prt_ctl_info( clinfo1='tmx - u: ', ivar1=INT(SUM( avmu(:,:,:) ) ), & 142 & clinfo2=' - v: ', ivar2=INT(SUM( avmv(:,:,:) ) ) ) 143 ENDIF 151 CALL lbc_lnk( avmu, 'U', 1. ) ; CALL lbc_lnk( avmv, 'V', 1. ) ! lateral boundary condition 152 153 IF(ln_ctl) CALL prt_ctl(tab3d_1=av_tide ,clinfo1=' tmx - av_tide: ',tab3d_2=avt,clinfo2=' avt: ',ovlap=1,kdim=jpk) 144 154 ! 145 155 END SUBROUTINE zdf_tmx … … 150 160 !! *** ROUTINE tmx_itf *** 151 161 !! 152 !! ** Purpose : add to the vertical mixing coefficients the effect of153 !! tidal mixing (st laurent et al. 2004) + specificities for the ITF154 !! region (vertical profil of energy (P. Bouruet Aubertot + Theo Gerkema)155 !! , q=1 all the energy remains confined)156 !! 157 !! ** Method : - tidal-induced vertical mixing is given by:158 !! Kz_tides = az_tmx / rn2, where az_tmx is a 2D coefficient setin159 !! zdf_tmx_init. This mixing is added to avt, avmu and avmv as160 !! follows: avt = avt + az_tmx161 !! avmu = avmu + mi(az_tmx)162 !! avmv = avmv + mj(az_tmx)163 !! 164 !! ** Action : Update avt, avmu and avmv162 !! ** Purpose : modify the vertical eddy diffusivity coefficients 163 !! (av_tide) in the Indonesian Through Flow area (ITF). 164 !! 165 !! ** Method : - Following Koch-Larrouy et al. (2007), in the ITF defined 166 !! by msk_itf (read in a file, see tmx_init), the tidal 167 !! mixing coefficient is computed with : 168 !! * q=1 (i.e. all the tidal energy remains trapped in 169 !! the area and thus is used for mixing) 170 !! * the vertical distribution of the tifal energy is a 171 !! proportional to N above the thermocline (d(N^2)/dz > 0) 172 !! and to N^2 below the thermocline (d(N^2)/dz < 0) 173 !! 174 !! ** Action : av_tide updated in the ITF area (msk_itf) 165 175 !! 166 176 !! References : Koch-Larrouy et al. 2007, GRL … … 335 345 !! 336 346 !! ** Purpose : Initialization of the vertical tidal mixing, Reading 337 !! of M2 and K1 tidal energy in nc files 338 !! 339 !! ** Method : Read the namtmx namelist and check the parameters 340 !! called at the first timestep (nit000), 341 !! - Read the M2 and K1 tidal energy in NetCDF files. 347 !! of M2 and K1 tidal energy in nc files 348 !! 349 !! ** Method : - Read the namtmx namelist and check the parameters 350 !! 351 !! - Read the input data in NetCDF files : 352 !! M2 and K1 tidal energy. The total tidal energy, en_tmx, 353 !! is the sum of M2, K1 and S2 energy where S2 is assumed 354 !! to be: S2=(1/2)^2 * M2 355 !! mask_itf, a mask array that determine where substituing 356 !! the standard Simmons et al. (2005) formulation with the 357 !! one of Koch_Larrouy et al. (2007). 358 !! 342 359 !! - Compute az_tmx, a 3D coefficient that allows to compute 343 !! the tidal-induced vertical mixing as follows: 344 !! Kz_tides = avt0 + az_tmx / max( rn_n2min, N^2 ) 345 !! where az_tmx is given by..... 360 !! the standard tidal-induced vertical mixing as follows: 361 !! Kz_tides = az_tmx / max( rn_n2min, N^2 ) 362 !! with az_tmx a bottom intensified coefficient is given by: 363 !! az_tmx(z) = en_tmx / ( rau0 * rn_htmx ) * EXP( -(H-z)/rn_htmx ) 364 !! / ( 1. - EXP( - H /rn_htmx ) ) 365 !! where rn_htmx the characteristic length scale of the bottom 366 !! intensification, en_tmx the tidal energy, and H the ocean depth 346 367 !! 347 368 !! ** input : - Namlist namtmx 348 !! - NetCDF file : M2_ORCA2.nc and K1_ORCA2.nc369 !! - NetCDF file : M2_ORCA2.nc, K1_ORCA2.nc, and mask_itf.nc 349 370 !! 350 371 !! ** Action : - Increase by 1 the nstop flag is setting problem encounter 351 372 !! - defined az_tmx used to compute tidal-induced mixing 352 !!---------------------------------------------------------------------- 353 USE iom ! to read input files 354 373 !! 374 !! References : Simmons et al. 2004, Ocean Modelling, 6, 3-4, 245-263. 375 !! Koch-Larrouy et al. 2007, GRL. 376 !!---------------------------------------------------------------------- 355 377 INTEGER :: ji, jj, jk ! dummy loop indices 356 378 INTEGER :: inum ! temporary logical unit … … 361 383 REAL(wp), DIMENSION(jpi,jpj) :: zhdep ! Ocean depth 362 384 REAL(wp), DIMENSION(jpi,jpj,jpk) :: zpc ! power consumption 363 364 ! ! * tidal mixing namelist * (namtmx) 385 !! 365 386 NAMELIST/namtmx/ rn_htmx, rn_n2min, rn_tfe, rn_tfe_itf, rn_me 366 387 !!---------------------------------------------------------------------- … … 408 429 en_tmx(:,:) = - rn_tfe * rn_me * ( zem2(:,:) * 1.25 + zek1(:,:) ) * tmask(:,:,1) 409 430 410 ! Bound total energy required to be <= 1 W/m2 411 ! Vertical structure 412 ! part independent of the level 413 DO jj = 1, jpj 431 ! Vertical structure (az_tmx) 432 DO jj = 1, jpj ! part independent of the level 414 433 DO ji = 1, jpi 415 434 zhdep(ji,jj) = fsdepw(ji,jj,mbathy(ji,jj)) ! depth of the ocean
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