| 1 | MODULE bdyice |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE bdyice *** |
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| 4 | !! Unstructured Open Boundary Cond. : Open boundary conditions for sea-ice (SI3) |
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| 5 | !!====================================================================== |
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| 6 | !! History : 3.3 ! 2010-09 (D. Storkey) Original code |
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| 7 | !! 3.4 ! 2012-01 (C. Rousset) add new sea ice model |
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| 8 | !! 4.0 ! 2018 (C. Rousset) SI3 compatibility |
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| 9 | !!---------------------------------------------------------------------- |
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| 10 | #if defined key_si3 |
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| 11 | !!---------------------------------------------------------------------- |
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| 12 | !! 'key_si3' SI3 sea ice model |
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| 13 | !!---------------------------------------------------------------------- |
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| 14 | !! bdy_ice : Application of open boundaries to ice |
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| 15 | !! bdy_ice_frs : Application of Flow Relaxation Scheme |
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| 16 | !!---------------------------------------------------------------------- |
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| 17 | USE oce ! ocean dynamics and tracers variables |
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| 18 | USE ice ! sea-ice: variables |
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| 19 | USE icevar ! sea-ice: operations |
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| 20 | USE icecor ! sea-ice: corrections |
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| 21 | USE icectl ! sea-ice: control prints |
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| 22 | USE phycst ! physical constant |
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| 23 | USE eosbn2 ! equation of state |
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| 24 | USE par_oce ! ocean parameters |
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| 25 | USE dom_oce ! ocean space and time domain variables |
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| 26 | USE sbc_oce ! Surface boundary condition: ocean fields |
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| 27 | USE bdy_oce ! ocean open boundary conditions |
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| 28 | ! |
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| 29 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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| 30 | USE in_out_manager ! write to numout file |
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| 31 | USE lib_mpp ! distributed memory computing |
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| 32 | USE lib_fortran ! to use key_nosignedzero |
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| 33 | USE timing ! Timing |
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| 34 | |
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| 35 | IMPLICIT NONE |
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| 36 | PRIVATE |
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| 37 | |
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| 38 | PUBLIC bdy_ice ! routine called in sbcmod |
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| 39 | PUBLIC bdy_ice_dyn ! routine called in icedyn_rhg_evp |
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| 40 | |
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| 41 | !!---------------------------------------------------------------------- |
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| 42 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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| 43 | !! $Id$ |
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| 44 | !! Software governed by the CeCILL license (see ./LICENSE) |
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| 45 | !!---------------------------------------------------------------------- |
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| 46 | CONTAINS |
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| 47 | |
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| 48 | SUBROUTINE bdy_ice( kt ) |
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| 49 | !!---------------------------------------------------------------------- |
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| 50 | !! *** SUBROUTINE bdy_ice *** |
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| 51 | !! |
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| 52 | !! ** Purpose : Apply open boundary conditions for sea ice |
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| 53 | !! |
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| 54 | !!---------------------------------------------------------------------- |
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| 55 | INTEGER, INTENT(in) :: kt ! Main time step counter |
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| 56 | ! |
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| 57 | INTEGER :: jbdy, ir ! BDY set index, rim index |
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| 58 | INTEGER :: ibeg, iend ! length of rim to be treated (rim 0 or rim 1) |
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| 59 | LOGICAL :: llrim0 ! indicate if rim 0 is treated |
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| 60 | LOGICAL, DIMENSION(4) :: llsend1, llrecv1 ! indicate how communications are to be carried out |
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| 61 | !!---------------------------------------------------------------------- |
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| 62 | ! controls |
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| 63 | IF( ln_timing ) CALL timing_start('bdy_ice_thd') ! timing |
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| 64 | IF( ln_icediachk ) CALL ice_cons_hsm(0,'bdy_ice_thd', rdiag_v, rdiag_s, rdiag_t, rdiag_fv, rdiag_fs, rdiag_ft) ! conservation |
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| 65 | IF( ln_icediachk ) CALL ice_cons2D (0,'bdy_ice_thd', diag_v, diag_s, diag_t, diag_fv, diag_fs, diag_ft) ! conservation |
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| 66 | ! |
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| 67 | CALL ice_var_glo2eqv |
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| 68 | ! |
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| 69 | llsend1(:) = .false. ; llrecv1(:) = .false. |
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| 70 | DO ir = 1, 0, -1 ! treat rim 1 before rim 0 |
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| 71 | IF( ir == 0 ) THEN ; llrim0 = .TRUE. |
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| 72 | ELSE ; llrim0 = .FALSE. |
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| 73 | END IF |
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| 74 | DO jbdy = 1, nb_bdy |
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| 75 | ! |
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| 76 | SELECT CASE( cn_ice(jbdy) ) |
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| 77 | CASE('none') ; CYCLE |
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| 78 | CASE('frs' ) ; CALL bdy_ice_frs( idx_bdy(jbdy), dta_bdy(jbdy), kt, jbdy, llrim0 ) |
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| 79 | CASE DEFAULT |
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| 80 | CALL ctl_stop( 'bdy_ice : unrecognised option for open boundaries for ice fields' ) |
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| 81 | END SELECT |
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| 82 | ! |
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| 83 | END DO |
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| 84 | ! |
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| 85 | ! Update bdy points |
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| 86 | IF( nn_hls > 1 .AND. ir == 1 ) CYCLE ! at least 2 halos will be corrected -> no need to correct rim 1 before rim 0 |
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| 87 | IF( nn_hls == 1 ) THEN ; llsend1(:) = .false. ; llrecv1(:) = .false. ; END IF |
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| 88 | DO jbdy = 1, nb_bdy |
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| 89 | IF( cn_ice(jbdy) == 'frs' ) THEN |
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| 90 | llsend1(:) = llsend1(:) .OR. lsend_bdyint(jbdy,1,:,ir) ! possibly every direction, T points |
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| 91 | llrecv1(:) = llrecv1(:) .OR. lrecv_bdyint(jbdy,1,:,ir) ! possibly every direction, T points |
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| 92 | END IF |
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| 93 | END DO ! jbdy |
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| 94 | IF( ANY(llsend1) .OR. ANY(llrecv1) ) THEN ! if need to send/recv in at least one direction |
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| 95 | ! exchange 3d arrays |
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| 96 | CALL lbc_lnk_multi( 'bdyice', a_i , 'T', 1., h_i , 'T', 1., h_s , 'T', 1., oa_i, 'T', 1. & |
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| 97 | & , a_ip, 'T', 1., v_ip, 'T', 1., s_i , 'T', 1., t_su, 'T', 1. & |
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| 98 | & , v_i , 'T', 1., v_s , 'T', 1., sv_i, 'T', 1. & |
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| 99 | & , kfillmode=jpfillnothing ,lsend=llsend1, lrecv=llrecv1 ) |
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| 100 | CALL lbc_lnk_multi( 'bdyice', lh_ip,'T', 1., kfillmode=jpfillnothing ,lsend=llsend1, lrecv=llrecv1 ) |
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| 101 | ! exchange 4d arrays : third dimension = 1 and then third dimension = jpk |
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| 102 | CALL lbc_lnk_multi( 'bdyice', t_s , 'T', 1., e_s , 'T', 1., kfillmode=jpfillnothing ,lsend=llsend1, lrecv=llrecv1 ) |
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| 103 | CALL lbc_lnk_multi( 'bdyice', t_i , 'T', 1., e_i , 'T', 1., kfillmode=jpfillnothing ,lsend=llsend1, lrecv=llrecv1 ) |
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| 104 | END IF |
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| 105 | END DO ! ir |
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| 106 | ! |
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| 107 | CALL ice_cor( kt , 0 ) ! -- In case categories are out of bounds, do a remapping |
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| 108 | ! ! i.e. inputs have not the same ice thickness distribution (set by rn_himean) |
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| 109 | ! ! than the regional simulation |
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| 110 | CALL ice_var_agg(1) |
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| 111 | ! |
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| 112 | ! controls |
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| 113 | IF( ln_icectl ) CALL ice_prt ( kt, iiceprt, jiceprt, 1, ' - ice thermo bdy - ' ) ! prints |
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| 114 | IF( ln_icediachk ) CALL ice_cons_hsm(1,'bdy_ice_thd', rdiag_v, rdiag_s, rdiag_t, rdiag_fv, rdiag_fs, rdiag_ft) ! conservation |
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| 115 | IF( ln_icediachk ) CALL ice_cons2D (1,'bdy_ice_thd', diag_v, diag_s, diag_t, diag_fv, diag_fs, diag_ft) ! conservation |
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| 116 | IF( ln_timing ) CALL timing_stop ('bdy_ice_thd') ! timing |
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| 117 | ! |
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| 118 | END SUBROUTINE bdy_ice |
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| 119 | |
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| 120 | |
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| 121 | SUBROUTINE bdy_ice_frs( idx, dta, kt, jbdy, llrim0 ) |
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| 122 | !!------------------------------------------------------------------------------ |
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| 123 | !! *** SUBROUTINE bdy_ice_frs *** |
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| 124 | !! |
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| 125 | !! ** Purpose : Apply the Flow Relaxation Scheme for sea-ice fields |
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| 126 | !! |
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| 127 | !! Reference : Engedahl H., 1995: Use of the flow relaxation scheme in a three- |
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| 128 | !! dimensional baroclinic ocean model with realistic topography. Tellus, 365-382. |
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| 129 | !!------------------------------------------------------------------------------ |
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| 130 | TYPE(OBC_INDEX), INTENT(in) :: idx ! OBC indices |
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| 131 | TYPE(OBC_DATA), INTENT(in) :: dta ! OBC external data |
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| 132 | INTEGER, INTENT(in) :: kt ! main time-step counter |
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| 133 | INTEGER, INTENT(in) :: jbdy ! BDY set index |
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| 134 | LOGICAL, INTENT(in) :: llrim0 ! indicate if rim 0 is treated |
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| 135 | ! |
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| 136 | INTEGER :: jpbound ! 0 = incoming ice |
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| 137 | ! ! 1 = outgoing ice |
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| 138 | INTEGER :: ibeg, iend ! length of rim to be treated (rim 0 or rim 1) |
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| 139 | INTEGER :: i_bdy, jgrd ! dummy loop indices |
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| 140 | INTEGER :: ji, jj, jk, jl, ib, jb |
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| 141 | REAL(wp) :: zwgt, zwgt1 ! local scalar |
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| 142 | REAL(wp) :: ztmelts, zdh |
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| 143 | REAL(wp), POINTER :: flagu, flagv ! short cuts |
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| 144 | !!------------------------------------------------------------------------------ |
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| 145 | ! |
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| 146 | jgrd = 1 ! Everything is at T-points here |
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| 147 | IF( llrim0 ) THEN ; ibeg = 1 ; iend = idx%nblenrim0(jgrd) |
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| 148 | ELSE ; ibeg = idx%nblenrim0(jgrd)+1 ; iend = idx%nblenrim(jgrd) |
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| 149 | END IF |
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| 150 | ! |
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| 151 | DO jl = 1, jpl |
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| 152 | DO i_bdy = ibeg, iend |
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| 153 | ji = idx%nbi(i_bdy,jgrd) |
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| 154 | jj = idx%nbj(i_bdy,jgrd) |
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| 155 | zwgt = idx%nbw(i_bdy,jgrd) |
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| 156 | zwgt1 = 1.e0 - idx%nbw(i_bdy,jgrd) |
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| 157 | a_i (ji,jj, jl) = ( a_i (ji,jj, jl) * zwgt1 + dta%a_i(i_bdy,jl) * zwgt ) * tmask(ji,jj,1) ! Ice concentration |
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| 158 | h_i (ji,jj, jl) = ( h_i (ji,jj, jl) * zwgt1 + dta%h_i(i_bdy,jl) * zwgt ) * tmask(ji,jj,1) ! Ice depth |
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| 159 | h_s (ji,jj, jl) = ( h_s (ji,jj, jl) * zwgt1 + dta%h_s(i_bdy,jl) * zwgt ) * tmask(ji,jj,1) ! Snow depth |
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| 160 | t_i (ji,jj,:,jl) = ( t_i (ji,jj,:,jl) * zwgt1 + dta%t_i(i_bdy,jl) * zwgt ) * tmask(ji,jj,1) ! Ice temperature |
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| 161 | t_s (ji,jj,:,jl) = ( t_s (ji,jj,:,jl) * zwgt1 + dta%t_s(i_bdy,jl) * zwgt ) * tmask(ji,jj,1) ! Snow temperature |
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| 162 | t_su(ji,jj, jl) = ( t_su(ji,jj, jl) * zwgt1 + dta%tsu(i_bdy,jl) * zwgt ) * tmask(ji,jj,1) ! Surf temperature |
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| 163 | s_i (ji,jj, jl) = ( s_i (ji,jj, jl) * zwgt1 + dta%s_i(i_bdy,jl) * zwgt ) * tmask(ji,jj,1) ! Ice salinity |
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| 164 | a_ip(ji,jj, jl) = ( a_ip(ji,jj, jl) * zwgt1 + dta%aip(i_bdy,jl) * zwgt ) * tmask(ji,jj,1) ! Ice pond concentration |
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| 165 | h_ip(ji,jj, jl) = ( h_ip(ji,jj, jl) * zwgt1 + dta%hip(i_bdy,jl) * zwgt ) * tmask(ji,jj,1) ! Ice pond depth |
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| 166 | lh_ip(ji,jj, jl) = ( lh_ip(ji,jj, jl) * zwgt1 + dta%hip(i_bdy,jl) * zwgt ) * tmask(ji,jj,1) ! Ice pond lid thickness |
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| 167 | ! |
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| 168 | sz_i(ji,jj,:,jl) = s_i(ji,jj,jl) |
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| 169 | ! |
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| 170 | ! make sure ponds = 0 if no ponds scheme |
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| 171 | IF( .NOT.ln_pnd ) THEN |
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| 172 | a_ip(ji,jj,jl) = 0._wp |
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| 173 | h_ip(ji,jj,jl) = 0._wp |
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| 174 | lh_ip(ji,jj,jl) = 0._wp |
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| 175 | ENDIF |
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| 176 | ! |
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| 177 | ! ----------------- |
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| 178 | ! Pathological case |
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| 179 | ! ----------------- |
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| 180 | ! In case a) snow load would be in excess or b) ice is coming into a warmer environment that would lead to |
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| 181 | ! very large transformation from snow to ice (see icethd_dh.F90) |
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| 182 | |
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| 183 | ! Then, a) transfer the snow excess into the ice (different from icethd_dh) |
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| 184 | zdh = MAX( 0._wp, ( rhos * h_s(ji,jj,jl) + ( rhoi - rau0 ) * h_i(ji,jj,jl) ) * r1_rau0 ) |
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| 185 | ! Or, b) transfer all the snow into ice (if incoming ice is likely to melt as it comes into a warmer environment) |
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| 186 | !zdh = MAX( 0._wp, h_s(ji,jj,jl) * rhos / rhoi ) |
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| 187 | |
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| 188 | ! recompute h_i, h_s |
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| 189 | h_i(ji,jj,jl) = MIN( hi_max(jl), h_i(ji,jj,jl) + zdh ) |
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| 190 | h_s(ji,jj,jl) = MAX( 0._wp, h_s(ji,jj,jl) - zdh * rhoi / rhos ) |
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| 191 | ! |
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| 192 | ENDDO |
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| 193 | ENDDO |
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| 194 | |
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| 195 | DO jl = 1, jpl |
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| 196 | DO i_bdy = ibeg, iend |
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| 197 | ji = idx%nbi(i_bdy,jgrd) |
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| 198 | jj = idx%nbj(i_bdy,jgrd) |
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| 199 | flagu => idx%flagu(i_bdy,jgrd) |
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| 200 | flagv => idx%flagv(i_bdy,jgrd) |
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| 201 | ! condition on ice thickness depends on the ice velocity |
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| 202 | ! if velocity is outward (strictly), then ice thickness, volume... must be equal to adjacent values |
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| 203 | jpbound = 0 ; ib = ji ; jb = jj |
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| 204 | ! |
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| 205 | IF( flagu == 1. ) THEN |
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| 206 | IF( ji+1 > jpi ) CYCLE |
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| 207 | IF( u_ice(ji ,jj ) < 0. ) jpbound = 1 ; ib = ji+1 |
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| 208 | END IF |
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| 209 | IF( flagu == -1. ) THEN |
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| 210 | IF( ji-1 < 1 ) CYCLE |
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| 211 | IF( u_ice(ji-1,jj ) < 0. ) jpbound = 1 ; ib = ji-1 |
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| 212 | END IF |
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| 213 | IF( flagv == 1. ) THEN |
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| 214 | IF( jj+1 > jpj ) CYCLE |
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| 215 | IF( v_ice(ji ,jj ) < 0. ) jpbound = 1 ; jb = jj+1 |
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| 216 | END IF |
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| 217 | IF( flagv == -1. ) THEN |
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| 218 | IF( jj-1 < 1 ) CYCLE |
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| 219 | IF( v_ice(ji ,jj-1) < 0. ) jpbound = 1 ; jb = jj-1 |
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| 220 | END IF |
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| 221 | ! |
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| 222 | IF( nn_ice_dta(jbdy) == 0 ) jpbound = 0 ; ib = ji ; jb = jj ! case ice boundaries = initial conditions |
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| 223 | ! ! do not make state variables dependent on velocity |
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| 224 | ! |
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| 225 | IF( a_i(ib,jb,jl) > 0._wp ) THEN ! there is ice at the boundary |
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| 226 | ! |
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| 227 | a_i (ji,jj, jl) = a_i (ib,jb, jl) |
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| 228 | h_i (ji,jj, jl) = h_i (ib,jb, jl) |
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| 229 | h_s (ji,jj, jl) = h_s (ib,jb, jl) |
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| 230 | t_i (ji,jj,:,jl) = t_i (ib,jb,:,jl) |
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| 231 | t_s (ji,jj,:,jl) = t_s (ib,jb,:,jl) |
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| 232 | t_su(ji,jj, jl) = t_su(ib,jb, jl) |
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| 233 | s_i (ji,jj, jl) = s_i (ib,jb, jl) |
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| 234 | a_ip(ji,jj, jl) = a_ip(ib,jb, jl) |
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| 235 | h_ip(ji,jj, jl) = h_ip(ib,jb, jl) |
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| 236 | lh_ip(ji,jj, jl) = lh_ip(ib,jb, jl) |
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| 237 | ! |
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| 238 | sz_i(ji,jj,:,jl) = sz_i(ib,jb,:,jl) |
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| 239 | ! |
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| 240 | ! ice age |
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| 241 | IF ( jpbound == 0 ) THEN ! velocity is inward |
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| 242 | oa_i(ji,jj,jl) = rice_age(jbdy) * a_i(ji,jj,jl) |
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| 243 | ELSEIF( jpbound == 1 ) THEN ! velocity is outward |
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| 244 | oa_i(ji,jj,jl) = oa_i(ib,jb,jl) |
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| 245 | ENDIF |
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| 246 | ! |
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| 247 | IF( nn_icesal == 1 ) THEN ! if constant salinity |
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| 248 | s_i (ji,jj ,jl) = rn_icesal |
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| 249 | sz_i(ji,jj,:,jl) = rn_icesal |
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| 250 | ENDIF |
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| 251 | ! |
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| 252 | ! global fields |
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| 253 | v_i (ji,jj,jl) = h_i(ji,jj,jl) * a_i(ji,jj,jl) ! volume ice |
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| 254 | v_s (ji,jj,jl) = h_s(ji,jj,jl) * a_i(ji,jj,jl) ! volume snw |
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| 255 | sv_i(ji,jj,jl) = MIN( s_i(ji,jj,jl) , sss_m(ji,jj) ) * v_i(ji,jj,jl) ! salt content |
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| 256 | DO jk = 1, nlay_s |
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| 257 | e_s(ji,jj,jk,jl) = rhos * ( rcpi * ( rt0 - t_s(ji,jj,jk,jl) ) + rLfus ) ! enthalpy in J/m3 |
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| 258 | e_s(ji,jj,jk,jl) = e_s(ji,jj,jk,jl) * v_s(ji,jj,jl) * r1_nlay_s ! enthalpy in J/m2 |
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| 259 | END DO |
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| 260 | DO jk = 1, nlay_i |
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| 261 | ztmelts = - rTmlt * sz_i(ji,jj,jk,jl) ! Melting temperature in C |
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| 262 | t_i(ji,jj,jk,jl) = MIN( t_i(ji,jj,jk,jl), ztmelts + rt0 ) ! Force t_i to be lower than melting point => likely conservation issue |
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| 263 | ! |
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| 264 | e_i(ji,jj,jk,jl) = rhoi * ( rcpi * ( ztmelts - ( t_i(ji,jj,jk,jl) - rt0 ) ) & ! enthalpy in J/m3 |
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| 265 | & + rLfus * ( 1._wp - ztmelts / ( t_i(ji,jj,jk,jl) - rt0 ) ) & |
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| 266 | & - rcp * ztmelts ) |
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| 267 | e_i(ji,jj,jk,jl) = e_i(ji,jj,jk,jl) * v_i(ji,jj,jl) * r1_nlay_i ! enthalpy in J/m2 |
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| 268 | END DO |
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| 269 | ! |
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| 270 | ! melt ponds |
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| 271 | IF( a_i(ji,jj,jl) > epsi10 ) THEN |
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| 272 | a_ip_frac(ji,jj,jl) = a_ip(ji,jj,jl) / a_i (ji,jj,jl) |
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| 273 | ELSE |
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| 274 | a_ip_frac(ji,jj,jl) = 0._wp |
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| 275 | ENDIF |
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| 276 | v_ip(ji,jj,jl) = h_ip(ji,jj,jl) * a_ip(ji,jj,jl) |
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| 277 | ! |
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| 278 | ELSE ! no ice at the boundary |
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| 279 | ! |
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| 280 | a_i (ji,jj, jl) = 0._wp |
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| 281 | h_i (ji,jj, jl) = 0._wp |
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| 282 | h_s (ji,jj, jl) = 0._wp |
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| 283 | oa_i(ji,jj, jl) = 0._wp |
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| 284 | a_ip(ji,jj, jl) = 0._wp |
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| 285 | v_ip(ji,jj, jl) = 0._wp |
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| 286 | lh_ip(ji,jj, jl) = 0._wp |
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| 287 | t_su(ji,jj, jl) = rt0 |
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| 288 | t_s (ji,jj,:,jl) = rt0 |
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| 289 | t_i (ji,jj,:,jl) = rt0 |
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| 290 | |
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| 291 | a_ip_frac(ji,jj,jl) = 0._wp |
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| 292 | h_ip (ji,jj,jl) = 0._wp |
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| 293 | a_ip (ji,jj,jl) = 0._wp |
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| 294 | v_ip (ji,jj,jl) = 0._wp |
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| 295 | |
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| 296 | IF( nn_icesal == 1 ) THEN ! if constant salinity |
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| 297 | s_i (ji,jj ,jl) = rn_icesal |
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| 298 | sz_i(ji,jj,:,jl) = rn_icesal |
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| 299 | ELSE ! if variable salinity |
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| 300 | s_i (ji,jj,jl) = rn_simin |
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| 301 | sz_i(ji,jj,:,jl) = rn_simin |
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| 302 | ENDIF |
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| 303 | ! |
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| 304 | ! global fields |
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| 305 | v_i (ji,jj, jl) = 0._wp |
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| 306 | v_s (ji,jj, jl) = 0._wp |
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| 307 | sv_i(ji,jj, jl) = 0._wp |
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| 308 | e_s (ji,jj,:,jl) = 0._wp |
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| 309 | e_i (ji,jj,:,jl) = 0._wp |
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| 310 | |
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| 311 | ENDIF |
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| 312 | |
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| 313 | END DO |
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| 314 | ! |
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| 315 | END DO ! jl |
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| 316 | ! |
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| 317 | END SUBROUTINE bdy_ice_frs |
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| 318 | |
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| 319 | |
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| 320 | SUBROUTINE bdy_ice_dyn( cd_type ) |
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| 321 | !!------------------------------------------------------------------------------ |
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| 322 | !! *** SUBROUTINE bdy_ice_dyn *** |
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| 323 | !! |
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| 324 | !! ** Purpose : Apply dynamics boundary conditions for sea-ice. |
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| 325 | !! |
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| 326 | !! ** Method : if this adjacent grid point is not ice free, then u_ice and v_ice take its value |
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| 327 | !! if is ice free, then u_ice and v_ice are unchanged by BDY |
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| 328 | !! they keep values calculated in rheology |
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| 329 | !! |
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| 330 | !!------------------------------------------------------------------------------ |
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| 331 | CHARACTER(len=1), INTENT(in) :: cd_type ! nature of velocity grid-points |
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| 332 | ! |
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| 333 | INTEGER :: i_bdy, jgrd ! dummy loop indices |
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| 334 | INTEGER :: ji, jj ! local scalar |
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| 335 | INTEGER :: jbdy, ir ! BDY set index, rim index |
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| 336 | INTEGER :: ibeg, iend ! length of rim to be treated (rim 0 or rim 1) |
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| 337 | REAL(wp) :: zmsk1, zmsk2, zflag |
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| 338 | LOGICAL, DIMENSION(4) :: llsend2, llrecv2, llsend3, llrecv3 ! indicate how communications are to be carried out |
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| 339 | !!------------------------------------------------------------------------------ |
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| 340 | IF( ln_timing ) CALL timing_start('bdy_ice_dyn') |
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| 341 | ! |
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| 342 | llsend2(:) = .false. ; llrecv2(:) = .false. |
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| 343 | llsend3(:) = .false. ; llrecv3(:) = .false. |
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| 344 | DO ir = 1, 0, -1 |
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| 345 | DO jbdy = 1, nb_bdy |
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| 346 | ! |
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| 347 | SELECT CASE( cn_ice(jbdy) ) |
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| 348 | ! |
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| 349 | CASE('none') |
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| 350 | CYCLE |
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| 351 | ! |
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| 352 | CASE('frs') |
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| 353 | ! |
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| 354 | IF( nn_ice_dta(jbdy) == 0 ) CYCLE ! case ice boundaries = initial conditions |
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| 355 | ! ! do not change ice velocity (it is only computed by rheology) |
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| 356 | SELECT CASE ( cd_type ) |
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| 357 | ! |
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| 358 | CASE ( 'U' ) |
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| 359 | jgrd = 2 ! u velocity |
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| 360 | IF( ir == 0 ) THEN ; ibeg = 1 ; iend = idx_bdy(jbdy)%nblenrim0(jgrd) |
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| 361 | ELSE ; ibeg = idx_bdy(jbdy)%nblenrim0(jgrd)+1 ; iend = idx_bdy(jbdy)%nblenrim(jgrd) |
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| 362 | END IF |
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| 363 | DO i_bdy = ibeg, iend |
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| 364 | ji = idx_bdy(jbdy)%nbi(i_bdy,jgrd) |
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| 365 | jj = idx_bdy(jbdy)%nbj(i_bdy,jgrd) |
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| 366 | zflag = idx_bdy(jbdy)%flagu(i_bdy,jgrd) |
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| 367 | ! i-1 i i | ! i i i+1 | ! i i i+1 | |
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| 368 | ! > ice > | ! o > ice | ! o > o | |
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| 369 | ! => set at u_ice(i-1) ! => set to O ! => unchanged |
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| 370 | IF( zflag == -1. .AND. ji > 1 .AND. ji < jpi ) THEN |
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| 371 | IF ( vt_i(ji ,jj) > 0. ) THEN ; u_ice(ji,jj) = u_ice(ji-1,jj) |
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| 372 | ELSEIF( vt_i(ji+1,jj) > 0. ) THEN ; u_ice(ji,jj) = 0._wp |
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| 373 | END IF |
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| 374 | END IF |
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| 375 | ! | i i+1 i+1 ! | i i i+1 ! | i i i+1 |
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| 376 | ! | > ice > ! | ice > o ! | o > o |
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| 377 | ! => set at u_ice(i+1) ! => set to O ! => unchanged |
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| 378 | IF( zflag == 1. .AND. ji+1 < jpi+1 ) THEN |
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| 379 | IF ( vt_i(ji+1,jj) > 0. ) THEN ; u_ice(ji,jj) = u_ice(ji+1,jj) |
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| 380 | ELSEIF( vt_i(ji ,jj) > 0. ) THEN ; u_ice(ji,jj) = 0._wp |
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| 381 | END IF |
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| 382 | END IF |
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| 383 | ! |
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| 384 | IF( zflag == 0. ) u_ice(ji,jj) = 0._wp ! u_ice = 0 if north/south bdy |
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| 385 | ! |
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| 386 | END DO |
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| 387 | ! |
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| 388 | CASE ( 'V' ) |
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| 389 | jgrd = 3 ! v velocity |
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| 390 | IF( ir == 0 ) THEN ; ibeg = 1 ; iend = idx_bdy(jbdy)%nblenrim0(jgrd) |
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| 391 | ELSE ; ibeg = idx_bdy(jbdy)%nblenrim0(jgrd)+1 ; iend = idx_bdy(jbdy)%nblenrim(jgrd) |
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| 392 | END IF |
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| 393 | DO i_bdy = ibeg, iend |
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| 394 | ji = idx_bdy(jbdy)%nbi(i_bdy,jgrd) |
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| 395 | jj = idx_bdy(jbdy)%nbj(i_bdy,jgrd) |
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| 396 | zflag = idx_bdy(jbdy)%flagv(i_bdy,jgrd) |
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| 397 | ! ! ice (jj+1) ! o (jj+1) |
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| 398 | ! ^ (jj ) ! ^ (jj ) ! ^ (jj ) |
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| 399 | ! ice (jj ) ! o (jj ) ! o (jj ) |
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| 400 | ! ^ (jj-1) ! ! |
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| 401 | ! => set to u_ice(jj-1) ! => set to 0 ! => unchanged |
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| 402 | IF( zflag == -1. .AND. jj > 1 .AND. jj < jpj ) THEN |
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| 403 | IF ( vt_i(ji,jj ) > 0. ) THEN ; v_ice(ji,jj) = v_ice(ji,jj-1) |
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| 404 | ELSEIF( vt_i(ji,jj+1) > 0. ) THEN ; v_ice(ji,jj) = 0._wp |
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| 405 | END IF |
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| 406 | END IF |
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| 407 | ! ^ (jj+1) ! ! |
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| 408 | ! ice (jj+1) ! o (jj+1) ! o (jj+1) |
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| 409 | ! ^ (jj ) ! ^ (jj ) ! ^ (jj ) |
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| 410 | ! ________________ ! ____ice___(jj )_ ! _____o____(jj ) |
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| 411 | ! => set to u_ice(jj+1) ! => set to 0 ! => unchanged |
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| 412 | IF( zflag == 1. .AND. jj < jpj ) THEN |
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| 413 | IF ( vt_i(ji,jj+1) > 0. ) THEN ; v_ice(ji,jj) = v_ice(ji,jj+1) |
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| 414 | ELSEIF( vt_i(ji,jj ) > 0. ) THEN ; v_ice(ji,jj) = 0._wp |
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| 415 | END IF |
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| 416 | END IF |
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| 417 | ! |
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| 418 | IF( zflag == 0. ) v_ice(ji,jj) = 0._wp ! v_ice = 0 if west/east bdy |
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| 419 | ! |
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| 420 | END DO |
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| 421 | ! |
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| 422 | END SELECT |
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| 423 | ! |
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| 424 | CASE DEFAULT |
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| 425 | CALL ctl_stop( 'bdy_ice_dyn : unrecognised option for open boundaries for ice fields' ) |
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| 426 | END SELECT |
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| 427 | ! |
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| 428 | END DO ! jbdy |
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| 429 | ! |
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| 430 | SELECT CASE ( cd_type ) |
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| 431 | CASE ( 'U' ) |
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| 432 | IF( nn_hls > 1 .AND. ir == 1 ) CYCLE ! at least 2 halos will be corrected -> no need to correct rim 1 before rim 0 |
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| 433 | IF( nn_hls == 1 ) THEN ; llsend2(:) = .false. ; llrecv2(:) = .false. ; END IF |
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| 434 | DO jbdy = 1, nb_bdy |
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| 435 | IF( cn_ice(jbdy) == 'frs' .AND. nn_ice_dta(jbdy) /= 0 ) THEN |
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| 436 | llsend2(:) = llsend2(:) .OR. lsend_bdyint(jbdy,2,:,ir) ! possibly every direction, U points |
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| 437 | llsend2(1) = llsend2(1) .OR. lsend_bdyext(jbdy,2,1,ir) ! neighbour might search point towards its west bdy |
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| 438 | llrecv2(:) = llrecv2(:) .OR. lrecv_bdyint(jbdy,2,:,ir) ! possibly every direction, U points |
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| 439 | llrecv2(2) = llrecv2(2) .OR. lrecv_bdyext(jbdy,2,2,ir) ! might search point towards east bdy |
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| 440 | END IF |
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| 441 | END DO |
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| 442 | IF( ANY(llsend2) .OR. ANY(llrecv2) ) THEN ! if need to send/recv in at least one direction |
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| 443 | CALL lbc_lnk( 'bdyice', u_ice, 'U', -1., kfillmode=jpfillnothing ,lsend=llsend2, lrecv=llrecv2 ) |
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| 444 | END IF |
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| 445 | CASE ( 'V' ) |
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| 446 | IF( nn_hls > 1 .AND. ir == 1 ) CYCLE ! at least 2 halos will be corrected -> no need to correct rim 1 before rim 0 |
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| 447 | IF( nn_hls == 1 ) THEN ; llsend3(:) = .false. ; llrecv3(:) = .false. ; END IF |
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| 448 | DO jbdy = 1, nb_bdy |
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| 449 | IF( cn_ice(jbdy) == 'frs' .AND. nn_ice_dta(jbdy) /= 0 ) THEN |
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| 450 | llsend3(:) = llsend3(:) .OR. lsend_bdyint(jbdy,3,:,ir) ! possibly every direction, V points |
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| 451 | llsend3(3) = llsend3(3) .OR. lsend_bdyext(jbdy,3,3,ir) ! neighbour might search point towards its south bdy |
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| 452 | llrecv3(:) = llrecv3(:) .OR. lrecv_bdyint(jbdy,3,:,ir) ! possibly every direction, V points |
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| 453 | llrecv3(4) = llrecv3(4) .OR. lrecv_bdyext(jbdy,3,4,ir) ! might search point towards north bdy |
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| 454 | END IF |
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| 455 | END DO |
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| 456 | IF( ANY(llsend3) .OR. ANY(llrecv3) ) THEN ! if need to send/recv in at least one direction |
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| 457 | CALL lbc_lnk( 'bdyice', v_ice, 'V', -1., kfillmode=jpfillnothing ,lsend=llsend3, lrecv=llrecv3 ) |
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| 458 | END IF |
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| 459 | END SELECT |
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| 460 | END DO ! ir |
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| 461 | ! |
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| 462 | IF( ln_timing ) CALL timing_stop('bdy_ice_dyn') |
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| 463 | ! |
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| 464 | END SUBROUTINE bdy_ice_dyn |
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| 465 | |
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| 466 | #else |
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| 467 | !!--------------------------------------------------------------------------------- |
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| 468 | !! Default option Empty module |
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| 469 | !!--------------------------------------------------------------------------------- |
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| 470 | CONTAINS |
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| 471 | SUBROUTINE bdy_ice( kt ) ! Empty routine |
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| 472 | IMPLICIT NONE |
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| 473 | INTEGER, INTENT( in ) :: kt |
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| 474 | WRITE(*,*) 'bdy_ice: You should not have seen this print! error?', kt |
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| 475 | END SUBROUTINE bdy_ice |
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| 476 | #endif |
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| 477 | |
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| 478 | !!================================================================================= |
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| 479 | END MODULE bdyice |
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