| [7991] | 1 | MODULE zdfsh2 |
|---|
| 2 | !!====================================================================== |
|---|
| 3 | !! *** MODULE zdfsh2 *** |
|---|
| 4 | !! Ocean physics: shear production term of TKE |
|---|
| 5 | !!===================================================================== |
|---|
| 6 | !! History : - ! 2014-10 (A. Barthelemy, G. Madec) original code |
|---|
| 7 | !! NEMO 4.0 ! 2017-04 (G. Madec) remove u-,v-pts avm |
|---|
| 8 | !!---------------------------------------------------------------------- |
|---|
| 9 | |
|---|
| 10 | !!---------------------------------------------------------------------- |
|---|
| 11 | !! zdf_sh2 : compute mixing the shear production term of TKE |
|---|
| 12 | !!---------------------------------------------------------------------- |
|---|
| 13 | USE oce ! ocean: shared variables |
|---|
| 14 | USE dom_oce ! domain: ocean |
|---|
| 15 | USE zdf_oce ! vertical physics: variables |
|---|
| 16 | ! |
|---|
| 17 | USE in_out_manager ! I/O manager |
|---|
| 18 | USE lib_mpp ! MPP library |
|---|
| 19 | USE timing ! Timing |
|---|
| 20 | |
|---|
| 21 | IMPLICIT NONE |
|---|
| 22 | PRIVATE |
|---|
| 23 | |
|---|
| 24 | PUBLIC zdf_sh2 ! called by zdftke, zdfglf, and zdfric |
|---|
| 25 | |
|---|
| 26 | !!---------------------------------------------------------------------- |
|---|
| 27 | !! NEMO/OPA 4.0 , NEMO Consortium (2017) |
|---|
| 28 | !! $Id: $ |
|---|
| 29 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
|---|
| 30 | !!---------------------------------------------------------------------- |
|---|
| 31 | CONTAINS |
|---|
| 32 | |
|---|
| 33 | SUBROUTINE zdf_sh2( psh2 ) |
|---|
| 34 | !!---------------------------------------------------------------------- |
|---|
| 35 | !! *** ROUTINE zdf_sh2 *** |
|---|
| 36 | !! |
|---|
| 37 | !! ** Purpose : Compute the shear production term of a TKE equation |
|---|
| 38 | !! |
|---|
| 39 | !! ** Method : - a stable discretization of this term is linked to the |
|---|
| 40 | !! time-space discretization of the vertical diffusion |
|---|
| 41 | !! of the OGCM. NEMO uses C-grid, a leap-frog environment |
|---|
| 42 | !! and an implicit computation of vertical mixing term, |
|---|
| 43 | !! so the shear production at w-point is given by: |
|---|
| 44 | !! sh2 = mi[ mi(avm) * dk[ub]/e3ub * dk[un]/e3un ] |
|---|
| 45 | !! + mj[ mj(avm) * dk[vb]/e3vb * dk[vn]/e3vn ] |
|---|
| 46 | !! NB: wet-point only horizontal averaging of shear |
|---|
| 47 | !! |
|---|
| 48 | !! ** Action : - psh2 shear prod. term at w-point (interior ocean domain only) |
|---|
| 49 | !! |
|---|
| 50 | !! References : Bruchard, OM 2002 |
|---|
| 51 | !! --------------------------------------------------------------------- |
|---|
| 52 | REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT( out) :: psh2 ! shear production of TKE (w-points) |
|---|
| 53 | ! |
|---|
| 54 | INTEGER :: ji, jj, jk ! dummy loop arguments |
|---|
| 55 | REAL(wp), DIMENSION(jpi,jpj) :: zsh2u, zsh2v ! 2D workspace |
|---|
| 56 | !!-------------------------------------------------------------------- |
|---|
| 57 | IF( nn_timing == 1 ) CALL timing_start('zdf_sh2') |
|---|
| 58 | ! |
|---|
| 59 | DO jk = 2, jpkm1 |
|---|
| [7997] | 60 | DO jj = 1, jpjm1 !* 2 x shear production at uw- and vw-points (energy conserving form) |
|---|
| [7991] | 61 | DO ji = 1, jpim1 |
|---|
| [7997] | 62 | zsh2u(ji,jj) = ( avm(ji+1,jj,jk) + avm(ji,jj,jk) ) & |
|---|
| 63 | & * ( un(ji,jj,jk-1) - un(ji,jj,jk) ) & |
|---|
| 64 | & * ( ub(ji,jj,jk-1) - ub(ji,jj,jk) ) / ( e3uw_n(ji,jj,jk) * e3uw_b(ji,jj,jk) ) * wumask(ji,jj,jk) |
|---|
| 65 | zsh2v(ji,jj) = ( avm(ji,jj+1,jk) + avm(ji,jj,jk) ) & |
|---|
| 66 | & * ( vn(ji,jj,jk-1) - vn(ji,jj,jk) ) & |
|---|
| 67 | & * ( vb(ji,jj,jk-1) - vb(ji,jj,jk) ) / ( e3vw_n(ji,jj,jk) * e3vw_b(ji,jj,jk) ) * wvmask(ji,jj,jk) |
|---|
| [7991] | 68 | END DO |
|---|
| 69 | END DO |
|---|
| 70 | DO jj = 2, jpjm1 !* shear production at w-point |
|---|
| [7997] | 71 | DO ji = 2, jpim1 ! coast mask: =2 at the coast ; =1 otherwise (NB: wmask useless as zsh2 are masked) |
|---|
| 72 | psh2(ji,jj,jk) = 0.25 * ( ( zsh2u(ji-1,jj) + zsh2u(ji,jj) ) * ( 2. - umask(ji-1,jj,jk) * umask(ji,jj,jk) ) & |
|---|
| 73 | & + ( zsh2v(ji,jj-1) + zsh2v(ji,jj) ) * ( 2. - vmask(ji,jj-1,jk) * vmask(ji,jj,jk) ) ) |
|---|
| [7991] | 74 | END DO |
|---|
| 75 | END DO |
|---|
| 76 | END DO |
|---|
| 77 | ! |
|---|
| 78 | IF( nn_timing == 1 ) CALL timing_stop('zdf_sh2') |
|---|
| 79 | ! |
|---|
| 80 | END SUBROUTINE zdf_sh2 |
|---|
| 81 | |
|---|
| 82 | !!====================================================================== |
|---|
| 83 | END MODULE zdfsh2 |
|---|
