[911] | 1 | MODULE bdydyn |
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[1125] | 2 | !!====================================================================== |
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[911] | 3 | !! *** MODULE bdydyn *** |
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[1125] | 4 | !! Unstructured Open Boundary Cond. : Flow relaxation scheme on velocities |
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| 5 | !!====================================================================== |
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| 6 | !! History : 1.0 ! 2005-02 (J. Chanut, A. Sellar) Original code |
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| 7 | !! - ! 2007-07 (D. Storkey) Move Flather implementation to separate routine. |
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| 8 | !! 3.0 ! 2008-04 (NEMO team) add in the reference version |
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[1502] | 9 | !! 3.2 ! 2008-04 (R. Benshila) consider velocity instead of transport |
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[2528] | 10 | !! 3.3 ! 2010-09 (E.O'Dea) modifications for Shelf configurations |
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| 11 | !! 3.3 ! 2010-09 (D.Storkey) add ice boundary conditions |
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[1125] | 12 | !!---------------------------------------------------------------------- |
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| 13 | #if defined key_bdy |
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| 14 | !!---------------------------------------------------------------------- |
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| 15 | !! 'key_bdy' : Unstructured Open Boundary Condition |
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| 16 | !!---------------------------------------------------------------------- |
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[911] | 17 | !! bdy_dyn_frs : relaxation of velocities on unstructured open boundary |
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| 18 | !! bdy_dyn_fla : Flather condition for barotropic solution |
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[1125] | 19 | !!---------------------------------------------------------------------- |
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[911] | 20 | USE oce ! ocean dynamics and tracers |
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| 21 | USE dom_oce ! ocean space and time domain |
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| 22 | USE bdy_oce ! ocean open boundary conditions |
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| 23 | USE dynspg_oce ! for barotropic variables |
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| 24 | USE phycst ! physical constants |
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| 25 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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| 26 | USE bdytides ! for tidal harmonic forcing at boundary |
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[1125] | 27 | USE in_out_manager ! |
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[3432] | 28 | USE timing, ONLY: timing_start, timing_stop |
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[911] | 29 | |
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| 30 | IMPLICIT NONE |
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| 31 | PRIVATE |
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| 32 | |
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[1125] | 33 | PUBLIC bdy_dyn_frs ! routine called in dynspg_flt (free surface case ONLY) |
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| 34 | # if defined key_dynspg_exp || defined key_dynspg_ts |
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| 35 | PUBLIC bdy_dyn_fla ! routine called in dynspg_flt (free surface case ONLY) |
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| 36 | # endif |
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[911] | 37 | |
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[3211] | 38 | !! * Control permutation of array indices |
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| 39 | # include "oce_ftrans.h90" |
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| 40 | # include "dom_oce_ftrans.h90" |
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| 41 | |
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[1125] | 42 | !!---------------------------------------------------------------------- |
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[2528] | 43 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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[1146] | 44 | !! $Id$ |
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[2528] | 45 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[1125] | 46 | !!---------------------------------------------------------------------- |
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[911] | 47 | CONTAINS |
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| 48 | |
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[1125] | 49 | SUBROUTINE bdy_dyn_frs( kt ) |
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| 50 | !!---------------------------------------------------------------------- |
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| 51 | !! *** SUBROUTINE bdy_dyn_frs *** |
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| 52 | !! |
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[911] | 53 | !! ** Purpose : - Apply the Flow Relaxation Scheme for dynamic in the |
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| 54 | !! case of unstructured open boundaries. |
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| 55 | !! |
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| 56 | !! References :- Engedahl H., 1995: Use of the flow relaxation scheme in |
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| 57 | !! a three-dimensional baroclinic ocean model with realistic |
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| 58 | !! topography. Tellus, 365-382. |
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[1125] | 59 | !!---------------------------------------------------------------------- |
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| 60 | INTEGER, INTENT( in ) :: kt ! Main time step counter |
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[911] | 61 | !! |
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[2528] | 62 | INTEGER :: jb, jk ! dummy loop indices |
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| 63 | INTEGER :: ii, ij, igrd ! local integers |
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| 64 | REAL(wp) :: zwgt ! boundary weight |
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[1125] | 65 | !!---------------------------------------------------------------------- |
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| 66 | ! |
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[2528] | 67 | IF(ln_dyn_frs) THEN ! If this is false, then this routine does nothing. |
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| 68 | ! |
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[1125] | 69 | IF( kt == nit000 ) THEN |
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| 70 | IF(lwp) WRITE(numout,*) |
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[2528] | 71 | IF(lwp) WRITE(numout,*) 'bdy_dyn_frs : Flow Relaxation Scheme on momentum' |
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[1125] | 72 | IF(lwp) WRITE(numout,*) '~~~~~~~' |
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| 73 | ENDIF |
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| 74 | ! |
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| 75 | igrd = 2 ! Relaxation of zonal velocity |
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[2528] | 76 | DO jb = 1, nblen(igrd) |
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| 77 | DO jk = 1, jpkm1 |
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| 78 | ii = nbi(jb,igrd) |
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| 79 | ij = nbj(jb,igrd) |
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| 80 | zwgt = nbw(jb,igrd) |
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| 81 | ua(ii,ij,jk) = ( ua(ii,ij,jk) * ( 1.- zwgt ) + ubdy(jb,jk) * zwgt ) * umask(ii,ij,jk) |
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[1125] | 82 | END DO |
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| 83 | END DO |
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| 84 | ! |
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| 85 | igrd = 3 ! Relaxation of meridional velocity |
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[2528] | 86 | DO jb = 1, nblen(igrd) |
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| 87 | DO jk = 1, jpkm1 |
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| 88 | ii = nbi(jb,igrd) |
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| 89 | ij = nbj(jb,igrd) |
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| 90 | zwgt = nbw(jb,igrd) |
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| 91 | va(ii,ij,jk) = ( va(ii,ij,jk) * ( 1.- zwgt ) + vbdy(jb,jk) * zwgt ) * vmask(ii,ij,jk) |
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[1125] | 92 | END DO |
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| 93 | END DO |
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[2528] | 94 | CALL lbc_lnk( ua, 'U', -1. ) ; CALL lbc_lnk( va, 'V', -1. ) ! Boundary points should be updated |
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[1125] | 95 | ! |
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[2528] | 96 | ENDIF ! ln_dyn_frs |
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| 97 | ! |
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[1125] | 98 | END SUBROUTINE bdy_dyn_frs |
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[911] | 99 | |
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| 100 | |
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[2528] | 101 | # if defined key_dynspg_exp || defined key_dynspg_ts |
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| 102 | !!---------------------------------------------------------------------- |
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| 103 | !! 'key_dynspg_exp' OR explicit sea surface height |
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| 104 | !! 'key_dynspg_ts ' split-explicit sea surface height |
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| 105 | !!---------------------------------------------------------------------- |
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| 106 | |
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[911] | 107 | !! Option to use Flather with dynspg_flt not coded yet... |
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[2528] | 108 | |
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[1502] | 109 | SUBROUTINE bdy_dyn_fla( pssh ) |
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[1125] | 110 | !!---------------------------------------------------------------------- |
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| 111 | !! *** SUBROUTINE bdy_dyn_fla *** |
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| 112 | !! |
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[911] | 113 | !! - Apply Flather boundary conditions on normal barotropic velocities |
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[2528] | 114 | !! (ln_dyn_fla=.true. or ln_tides=.true.) |
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[911] | 115 | !! |
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| 116 | !! ** WARNINGS about FLATHER implementation: |
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| 117 | !!1. According to Palma and Matano, 1998 "after ssh" is used. |
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| 118 | !! In ROMS and POM implementations, it is "now ssh". In the current |
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| 119 | !! implementation (tested only in the EEL-R5 conf.), both cases were unstable. |
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| 120 | !! So I use "before ssh" in the following. |
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| 121 | !! |
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| 122 | !!2. We assume that the normal ssh gradient at the bdy is zero. As a matter of |
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| 123 | !! fact, the model ssh just inside the dynamical boundary is used (the outside |
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| 124 | !! ssh in the code is not updated). |
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| 125 | !! |
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[1125] | 126 | !! References: Flather, R. A., 1976: A tidal model of the northwest European |
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| 127 | !! continental shelf. Mem. Soc. R. Sci. Liege, Ser. 6,10, 141-164. |
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| 128 | !!---------------------------------------------------------------------- |
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[3432] | 129 | USE exchmod, Only: add_exch, bound_exch_list |
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[1502] | 130 | REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: pssh |
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| 131 | |
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[2528] | 132 | INTEGER :: jb, igrd ! dummy loop indices |
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[1125] | 133 | INTEGER :: ii, ij, iim1, iip1, ijm1, ijp1 ! 2D addresses |
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| 134 | REAL(wp) :: zcorr ! Flather correction |
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[1502] | 135 | REAL(wp) :: zforc ! temporary scalar |
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[1125] | 136 | !!---------------------------------------------------------------------- |
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[911] | 137 | |
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[3432] | 138 | CALL timing_start('bdy_dyn_fla') |
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| 139 | |
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[911] | 140 | ! ---------------------------------! |
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| 141 | ! Flather boundary conditions :! |
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| 142 | ! ---------------------------------! |
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[3211] | 143 | |
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[2528] | 144 | IF(ln_dyn_fla .OR. ln_tides) THEN ! If these are both false, then this routine does nothing. |
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[1125] | 145 | |
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[1502] | 146 | ! Fill temporary array with ssh data (here spgu): |
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[2528] | 147 | igrd = 4 |
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[1502] | 148 | spgu(:,:) = 0.0 |
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[2528] | 149 | DO jb = 1, nblenrim(igrd) |
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| 150 | ii = nbi(jb,igrd) |
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| 151 | ij = nbj(jb,igrd) |
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| 152 | IF( ln_dyn_fla ) spgu(ii, ij) = sshbdy(jb) |
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| 153 | IF( ln_tides ) spgu(ii, ij) = spgu(ii, ij) + sshtide(jb) |
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[1502] | 154 | END DO |
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[1125] | 155 | ! |
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[2528] | 156 | igrd = 5 ! Flather bc on u-velocity; |
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[1502] | 157 | ! ! remember that flagu=-1 if normal velocity direction is outward |
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| 158 | ! ! I think we should rather use after ssh ? |
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[2528] | 159 | DO jb = 1, nblenrim(igrd) |
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| 160 | ii = nbi(jb,igrd) |
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| 161 | ij = nbj(jb,igrd) |
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| 162 | iim1 = ii + MAX( 0, INT( flagu(jb) ) ) ! T pts i-indice inside the boundary |
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| 163 | iip1 = ii - MIN( 0, INT( flagu(jb) ) ) ! T pts i-indice outside the boundary |
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[1502] | 164 | ! |
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[2528] | 165 | zcorr = - flagu(jb) * SQRT( grav * hur_e(ii, ij) ) * ( pssh(iim1, ij) - spgu(iip1,ij) ) |
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| 166 | zforc = ubtbdy(jb) + utide(jb) |
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[3432] | 167 | #if defined key_z_first |
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| 168 | ua_e(ii,ij) = zforc + zcorr * umask_1(ii,ij) |
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| 169 | #else |
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| 170 | ua_e(ii,ij) = zforc + zcorr * umask(ii,ij,1) |
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| 171 | #endif |
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[1502] | 172 | END DO |
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[1125] | 173 | ! |
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[2528] | 174 | igrd = 6 ! Flather bc on v-velocity |
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[1502] | 175 | ! ! remember that flagv=-1 if normal velocity direction is outward |
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[2528] | 176 | DO jb = 1, nblenrim(igrd) |
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| 177 | ii = nbi(jb,igrd) |
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| 178 | ij = nbj(jb,igrd) |
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| 179 | ijm1 = ij + MAX( 0, INT( flagv(jb) ) ) ! T pts j-indice inside the boundary |
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| 180 | ijp1 = ij - MIN( 0, INT( flagv(jb) ) ) ! T pts j-indice outside the boundary |
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[1502] | 181 | ! |
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[2528] | 182 | zcorr = - flagv(jb) * SQRT( grav * hvr_e(ii, ij) ) * ( pssh(ii, ijm1) - spgu(ii,ijp1) ) |
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| 183 | zforc = vbtbdy(jb) + vtide(jb) |
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[3432] | 184 | #if defined key_z_first |
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| 185 | va_e(ii,ij) = zforc + zcorr * vmask_1(ii,ij) |
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| 186 | #else |
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[1502] | 187 | va_e(ii,ij) = zforc + zcorr * vmask(ii,ij,1) |
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[3432] | 188 | #endif |
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[1502] | 189 | END DO |
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[3432] | 190 | |
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| 191 | ! |
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| 192 | #if defined key_mpp_rkpart |
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| 193 | ! Is quicker to pack halo-swaps for 2D fields than to do them |
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| 194 | ! individually |
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| 195 | CALL add_exch(jpreci,'U',Iminus,Jminus,Iplus,Jplus,ua_e,isgn=-1) |
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| 196 | CALL add_exch(jpreci,'V',Iminus,Jminus,Iplus,Jplus,va_e,isgn=-1) |
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| 197 | CALL bound_exch_list() |
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| 198 | #else |
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[2528] | 199 | CALL lbc_lnk( ua_e, 'U', -1. ) ! Boundary points should be updated |
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| 200 | CALL lbc_lnk( va_e, 'V', -1. ) ! |
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[3432] | 201 | #endif |
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[1502] | 202 | ! |
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[2528] | 203 | ENDIF ! ln_dyn_fla .or. ln_tides |
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[1125] | 204 | ! |
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[3432] | 205 | CALL timing_stop('bdy_dyn_fla','section') |
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| 206 | ! |
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[911] | 207 | END SUBROUTINE bdy_dyn_fla |
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| 208 | #endif |
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| 209 | |
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| 210 | #else |
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[1125] | 211 | !!---------------------------------------------------------------------- |
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| 212 | !! Dummy module NO Unstruct Open Boundary Conditions |
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| 213 | !!---------------------------------------------------------------------- |
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[911] | 214 | CONTAINS |
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[1125] | 215 | SUBROUTINE bdy_dyn_frs( kt ) ! Empty routine |
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| 216 | WRITE(*,*) 'bdy_dyn_frs: You should not have seen this print! error?', kt |
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[911] | 217 | END SUBROUTINE bdy_dyn_frs |
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[1559] | 218 | SUBROUTINE bdy_dyn_fla( pssh ) ! Empty routine |
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| 219 | REAL :: pssh(:,:) |
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| 220 | WRITE(*,*) 'bdy_dyn_fla: You should not have seen this print! error?', pssh(1,1) |
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[911] | 221 | END SUBROUTINE bdy_dyn_fla |
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| 222 | #endif |
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| 223 | |
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[1125] | 224 | !!====================================================================== |
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[911] | 225 | END MODULE bdydyn |
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