| 1 | MODULE zdfqiao |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE zdfqiao *** |
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| 4 | !! Qiao module : vertical mixing enhancement due to surface waves |
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| 5 | !!====================================================================== |
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| 6 | !! History : 3.6 ! 2014-10 (E. Clementi) Original code |
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| 7 | !!---------------------------------------------------------------------- |
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| 8 | !!---------------------------------------------------------------------- |
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| 9 | !! qiao_init |
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| 10 | !! zdf_qiao : compute Qiao parameters |
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| 11 | !!---------------------------------------------------------------------- |
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| 12 | |
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| 13 | USE iom ! I/O manager library |
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| 14 | USE in_out_manager ! I/O manager |
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| 15 | USE lib_mpp ! distribued memory computing library |
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| 16 | USE sbc_oce ! Surface boundary condition: ocean fields |
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| 17 | USE zdf_oce |
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| 18 | USE sbcwave ! wave module |
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| 19 | USE dom_oce |
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| 20 | |
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| 21 | !!---------------------------------------------------------------------- |
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| 22 | !! qiao_init : compute QBv: Qiao terms to be added to vertical eddy |
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| 23 | !! diffusivity and viscosity coefficients |
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| 24 | !!---------------------------------------------------------------------- |
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| 25 | |
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| 26 | IMPLICIT NONE |
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| 27 | PRIVATE |
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| 28 | |
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| 29 | PUBLIC zdf_qiao ! routine called in zdf_ric |
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| 30 | |
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| 31 | REAL(wp),PUBLIC,ALLOCATABLE,DIMENSION (:,:,:) :: QBv, QBvu, QBvv |
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| 32 | |
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| 33 | !!---------------------------------------------------------------------- |
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| 34 | !! NEMO/OPA 4.0 , NEMO Consortium (2011) |
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| 35 | !! $Id: $ |
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| 36 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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| 37 | !!---------------------------------------------------------------------- |
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| 38 | |
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| 39 | CONTAINS |
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| 40 | |
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| 41 | SUBROUTINE zdf_qiao( kt ) |
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| 42 | !!--------------------------------------------------------------------- |
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| 43 | !! *** ROUTINE zdf_qiao *** |
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| 44 | !! |
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| 45 | !! ** Purpose :Compute the Qiao term (QBv) to be added to |
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| 46 | !! vertical viscosity and diffusivity coeffs. |
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| 47 | !! |
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| 48 | !! ** Method :QBv = alpha * A * Us(0) * exp (3 * k * z) |
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| 49 | !! |
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| 50 | !! ** action :Compute the Qiao wave dependent term |
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| 51 | !! only if ln_wave=.true. |
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| 52 | !! |
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| 53 | !!--------------------------------------------------------------------- |
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| 54 | INTEGER, INTENT( in ) :: kt ! ocean time step |
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| 55 | ! |
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| 56 | INTEGER :: jj, ji, jk |
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| 57 | !!--------------------------------------------------------------------- |
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| 58 | ! |
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| 59 | ! |
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| 60 | ! ! -------------------- ! |
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| 61 | IF( kt == nit000 ) THEN ! First call kt=nit000 ! |
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| 62 | ALLOCATE(QBv(jpi,jpj,jpk)) ! -------------------- ! |
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| 63 | ALLOCATE(QBvu(jpi,jpj,jpk)) |
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| 64 | ALLOCATE(QBvv(jpi,jpj,jpk)) |
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| 65 | ENDIF |
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| 66 | |
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| 67 | QBv (:,:,:) = 0.0 |
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| 68 | QBvu(:,:,:) = 0.0 |
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| 69 | QBvv(:,:,:) = 0.0 |
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| 70 | |
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| 71 | ! |
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| 72 | ! Compute the Qiao term Bv (QBv) to be added to |
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| 73 | ! vertical viscosity and diffusivity |
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| 74 | ! QBv = alpha * A * Us(0) * exp (3 * k * z) |
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| 75 | ! alpha here is set to 1 |
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| 76 | !--------------------------------------------------------------------------------- |
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| 77 | ! |
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| 78 | IF ( ln_wave ) THEN |
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| 79 | DO jk = 1, jpk |
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| 80 | DO jj = 1, jpjm1 |
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| 81 | DO ji = 1, jpim1 |
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| 82 | QBv(ji,jj,jk) = 1.0 * 0.353553 * swh(ji,jj) * tsd2d(ji,jj) * & |
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| 83 | & exp(3.0 * wnum(ji,jj) * & |
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| 84 | & (-MIN( gdept_0(ji ,jj ,jk) , gdept_0(ji+1,jj ,jk), & |
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| 85 | & gdept_0(ji ,jj+1,jk),gdept_0(ji+1,jj+1,jk)))) |
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| 86 | END DO |
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| 87 | END DO |
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| 88 | END DO |
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| 89 | |
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| 90 | QBv(jpi,:,:)=QBv(jpim1,:,:) |
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| 91 | QBv(:,jpj,:)=QBv(:,jpjm1,:) |
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| 92 | |
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| 93 | ! |
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| 94 | ! Interpolate Qiao parameter QBv into the grid_U and grid_V |
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| 95 | !------------------------------------------------- |
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| 96 | ! |
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| 97 | DO jk = 1, jpk |
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| 98 | DO jj = 1, jpjm1 |
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| 99 | DO ji = 1, jpim1 |
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| 100 | QBvu(ji,jj,jk)=0.5 * ( 2. - umask(ji,jj,jk) ) * & |
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| 101 | & ( QBv(ji,jj,jk) * tmask(ji,jj,jk) & |
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| 102 | & + QBv(ji+1,jj,jk) * tmask(ji+1,jj,jk) ) |
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| 103 | QBvv(ji,jj,jk)=0.5 * ( 2. - vmask(ji,jj,jk) ) * & |
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| 104 | & ( QBv(ji,jj,jk) * tmask(ji,jj,jk) & |
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| 105 | & + QBv(ji,jj+1,jk) * tmask(ji,jj+1,jk) ) |
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| 106 | |
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| 107 | END DO |
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| 108 | END DO |
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| 109 | END DO |
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| 110 | ! |
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| 111 | QBvu(jpi,:,:)=QBvu(jpim1,:,:) |
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| 112 | QBvu(:,jpj,:)=QBvu(:,jpjm1,:) |
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| 113 | QBvv(jpi,:,:)=QBvv(jpim1,:,:) |
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| 114 | QBvv(:,jpj,:)=QBvv(:,jpjm1,:) |
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| 115 | |
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| 116 | ELSE |
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| 117 | CALL ctl_stop( 'STOP', 'To use Qiao formulation you have to set: ln_wave=.true.') |
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| 118 | ENDIF |
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| 119 | ! |
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| 120 | END SUBROUTINE zdf_qiao |
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| 121 | |
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| 122 | !!====================================================================== |
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| 123 | END MODULE zdfqiao |
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