| 1 | MODULE bdyice |
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| 2 | !!================================================================================= |
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| 3 | !! *** MODULE bdyice *** |
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| 4 | !! Ocean tracers: Flow Relaxation Scheme of sea-ice fields on each open boundary |
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| 5 | !!================================================================================= |
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| 6 | #if defined key_bdy && defined key_lim2 |
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| 7 | !!--------------------------------------------------------------------------------- |
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| 8 | !! 'key_bdy' : Unstructured Open Boundary Conditions |
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| 9 | !!--------------------------------------------------------------------------------- |
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| 10 | !! bdy_ice : Relaxation of tracers on unstructured open boundaries |
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| 11 | !!--------------------------------------------------------------------------------- |
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| 12 | !! * Modules used |
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| 13 | USE oce ! ocean dynamics and tracers variables |
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| 14 | #if defined key_lim2 |
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| 15 | USE ice_2 ! LIM_2 ice variables |
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| 16 | #endif |
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| 17 | USE dom_oce ! ocean space and time domain variables |
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| 18 | USE bdy_oce ! ocean open boundary conditions |
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| 19 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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| 20 | USE in_out_manager ! write to numout file |
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| 21 | IMPLICIT NONE |
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| 22 | PRIVATE |
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| 23 | |
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| 24 | !! * Accessibility |
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| 25 | PUBLIC bdy_ice ! routine called in stp |
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| 26 | |
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| 27 | !! * Substitutions |
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| 28 | |
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| 29 | !!--------------------------------------------------------------------------------- |
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| 30 | !! OPA 9.0 , LODYC-IPSL (2003) |
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| 31 | !!--------------------------------------------------------------------------------- |
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| 32 | |
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| 33 | CONTAINS |
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| 34 | |
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| 35 | SUBROUTINE bdy_ice( kt ) |
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| 36 | !!------------------------------------------------------------------------------ |
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| 37 | !! *** SUBROUTINE bdy_ice *** |
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| 38 | !! |
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| 39 | !! ** Purpose : Apply the Flow Relaxation Scheme for sea-ice fields in the |
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| 40 | !! case of unstructured open boundaries. Currently only tested |
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| 41 | !! for LIM2. |
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| 42 | !! |
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| 43 | !! Reference : Engedahl H., 1995: Use of the flow relaxation scheme in |
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| 44 | !! a three-dimensional baroclinic ocean model with realistic |
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| 45 | !! topography. Tellus, 365-382. |
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| 46 | !! History : |
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| 47 | !! NEMO 3.3 ! 2010-09 (D. Storkey) Original code |
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| 48 | !!------------------------------------------------------------------------------ |
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| 49 | !! * Arguments |
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| 50 | INTEGER, INTENT( in ) :: kt |
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| 51 | |
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| 52 | !! * Local declarations |
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| 53 | REAL(wp) :: zwgt ! boundary weight |
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| 54 | INTEGER :: jb, jk, jgrd ! dummy loop indices |
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| 55 | INTEGER :: ii, ij ! 2D addresses |
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| 56 | !!------------------------------------------------------------------------------ |
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| 57 | |
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| 58 | jgrd=1 !: Everything is at T-points here |
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| 59 | |
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| 60 | IF(ln_bdy_ice_frs) THEN |
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| 61 | |
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| 62 | DO jb = 1, nblen(jgrd) |
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| 63 | DO jk = 1, jpkm1 |
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| 64 | ii = nbi(jb,jgrd) |
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| 65 | ij = nbj(jb,jgrd) |
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| 66 | zwgt = nbw(jb,jgrd) |
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| 67 | |
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| 68 | ! Leads fraction relaxation at the boundary |
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| 69 | frld(ii,ij) = ( frld(ii,ij)*(1.-zwgt) + frld_bdy(jb)*zwgt ) & |
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| 70 | * tmask(ii,ij,1) |
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| 71 | |
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| 72 | ! Ice depth relaxation at the boundary |
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| 73 | hicif(ii,ij) = ( hicif(ii,ij)*(1.-zwgt) + hicif_bdy(jb)*zwgt ) & |
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| 74 | * tmask(ii,ij,1) |
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| 75 | ! Snow depth relaxation at the boundary |
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| 76 | hsnif(ii,ij) = ( hsnif(ii,ij)*(1.-zwgt) + hsnif_bdy(jb)*zwgt ) & |
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| 77 | * tmask(ii,ij,1) |
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| 78 | |
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| 79 | END DO |
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| 80 | END DO |
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| 81 | |
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| 82 | CALL lbc_lnk( frld, 'T', 1. ) ! Boundary points should be updated |
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| 83 | CALL lbc_lnk( hicif, 'T', 1. ) ! |
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| 84 | CALL lbc_lnk( hsnif, 'T', 1. ) ! |
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| 85 | |
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| 86 | ELSE |
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| 87 | ! we have called this routine without ln_bdy_ice_frs not set |
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| 88 | IF(kt .EQ. nit000) THEN |
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| 89 | WRITE(numout,*) 'E R R O R (possible) called bdy_ice when' |
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| 90 | WRITE(numout,*) 'ln_bdy_ice_frs is false?' |
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| 91 | ENDIF |
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| 92 | ENDIF ! if ln_bdy_ice_frs |
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| 93 | |
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| 94 | END SUBROUTINE bdy_ice |
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| 95 | #else |
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| 96 | !!--------------------------------------------------------------------------------- |
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| 97 | !! Default option Empty module |
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| 98 | !!--------------------------------------------------------------------------------- |
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| 99 | CONTAINS |
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| 100 | SUBROUTINE bdy_ice( kt ) ! Empty routine |
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| 101 | END SUBROUTINE bdy_ice |
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| 102 | #endif |
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| 103 | |
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| 104 | !!================================================================================= |
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| 105 | END MODULE bdyice |
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