[8409] | 1 | MODULE iceadv |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE iceadv *** |
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| 4 | !! LIM transport ice model : sea-ice advection/diffusion |
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| 5 | !!====================================================================== |
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| 6 | !! History : LIM-2 ! 2000-01 (M.A. Morales Maqueda, H. Goosse, and T. Fichefet) Original code |
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| 7 | !! 3.0 ! 2005-11 (M. Vancoppenolle) Multi-layer sea ice, salinity variations |
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| 8 | !! 4.0 ! 2011-02 (G. Madec) dynamical allocation |
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| 9 | !!---------------------------------------------------------------------- |
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| 10 | #if defined key_lim3 |
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| 11 | !!---------------------------------------------------------------------- |
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[8486] | 12 | !! 'key_lim3' LIM3 sea-ice model |
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[8409] | 13 | !!---------------------------------------------------------------------- |
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[8486] | 14 | !! ice_adv : advection/diffusion process of sea ice |
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[8409] | 15 | !!---------------------------------------------------------------------- |
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| 16 | USE phycst ! physical constant |
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| 17 | USE dom_oce ! ocean domain |
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[8486] | 18 | USE sbc_oce , ONLY : nn_fsbc ! frequency of sea-ice call |
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| 19 | USE ice ! sea-ice: variables |
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| 20 | USE icevar ! sea-ice: operations |
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| 21 | USE iceadv_prather ! sea-ice: advection scheme (Prather) |
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| 22 | USE iceadv_umx ! sea-ice: advection scheme (ultimate-macho) |
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| 23 | USE icectl ! sea-ice: control prints |
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[8409] | 24 | ! |
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| 25 | USE in_out_manager ! I/O manager |
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| 26 | USE lbclnk ! lateral boundary conditions -- MPP exchanges |
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| 27 | USE lib_mpp ! MPP library |
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| 28 | USE prtctl ! Print control |
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| 29 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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| 30 | USE timing ! Timing |
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[8500] | 31 | USE iom ! |
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[8409] | 32 | |
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| 33 | IMPLICIT NONE |
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| 34 | PRIVATE |
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| 35 | |
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[8512] | 36 | PUBLIC ice_adv ! called by icestp |
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| 37 | PUBLIC ice_adv_init ! called by icestp |
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[8409] | 38 | |
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[8514] | 39 | INTEGER, PUBLIC :: nice_dyn !: choice of the type of advection scheme |
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[8512] | 40 | ! ! associated indices: |
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[8514] | 41 | INTEGER, PUBLIC, PARAMETER :: np_dynNO = 0 !: no ice dynamics and ice advection |
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| 42 | INTEGER, PUBLIC, PARAMETER :: np_dynFULL = 1 !: full ice dynamics (rheology + advection + ridging/rafting + correction) |
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| 43 | INTEGER, PUBLIC, PARAMETER :: np_dyn = 2 !: no ridging/rafting (rheology + advection + correction) |
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| 44 | INTEGER, PUBLIC, PARAMETER :: np_dynPURE = 3 !: pure dynamics (rheology + advection) |
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[8512] | 45 | |
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[8409] | 46 | !! * Substitution |
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| 47 | # include "vectopt_loop_substitute.h90" |
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| 48 | !!---------------------------------------------------------------------- |
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[8486] | 49 | !! NEMO/ICE 4.0 , NEMO Consortium (2017) |
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[8409] | 50 | !! $Id: iceadv.F90 8373 2017-07-25 17:44:54Z clem $ |
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| 51 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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| 52 | !!---------------------------------------------------------------------- |
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| 53 | CONTAINS |
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| 54 | |
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| 55 | SUBROUTINE ice_adv( kt ) |
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[8486] | 56 | !!---------------------------------------------------------------------- |
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[8409] | 57 | !! *** ROUTINE ice_adv *** |
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| 58 | !! |
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[8504] | 59 | !! ** purpose : advection of sea ice |
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[8409] | 60 | !! |
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| 61 | !! ** method : variables included in the process are scalar, |
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| 62 | !! other values are considered as second order. |
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| 63 | !! For advection, one can choose between |
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[8512] | 64 | !! a) an Ultimate-Macho scheme (whose order is defined by nn_UMx) => ln_adv_UMx |
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| 65 | !! b) and a second order Prather scheme => ln_adv_Pra |
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[8409] | 66 | !! |
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| 67 | !! ** action : |
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[8486] | 68 | !!---------------------------------------------------------------------- |
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[8409] | 69 | INTEGER, INTENT(in) :: kt ! number of iteration |
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| 70 | ! |
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| 71 | INTEGER :: ji, jj, jk, jl, jt ! dummy loop indices |
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| 72 | INTEGER :: initad ! number of sub-timestep for the advection |
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| 73 | REAL(wp) :: zcfl , zusnit ! - - |
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| 74 | CHARACTER(len=80) :: cltmp |
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| 75 | ! |
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| 76 | REAL(wp) :: zvi_b, zsmv_b, zei_b, zfs_b, zfw_b, zft_b |
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[8500] | 77 | REAL(wp) :: zdv |
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[8409] | 78 | REAL(wp), DIMENSION(jpi,jpj) :: zatold, zeiold, zesold, zsmvold |
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| 79 | REAL(wp), DIMENSION(jpi,jpj,jpl) :: zhimax, zviold, zvsold |
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| 80 | !!--------------------------------------------------------------------- |
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| 81 | IF( nn_timing == 1 ) CALL timing_start('iceadv') |
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| 82 | |
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| 83 | IF( kt == nit000 .AND. lwp ) THEN |
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[8504] | 84 | WRITE(numout,*) |
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[8512] | 85 | WRITE(numout,*) 'ice_adv: sea-ice advection' |
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| 86 | WRITE(numout,*) '~~~~~~~' |
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[8409] | 87 | ENDIF |
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| 88 | |
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[8424] | 89 | CALL ice_var_agg( 1 ) ! integrated values + ato_i |
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[8409] | 90 | |
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| 91 | ! conservation test |
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[8514] | 92 | IF( ln_icediachk ) CALL ice_cons_hsm(0, 'iceadv', zvi_b, zsmv_b, zei_b, zfw_b, zfs_b, zft_b) |
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[8409] | 93 | |
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| 94 | ! store old values for diag |
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[8504] | 95 | zviold (:,:,:) = v_i(:,:,:) |
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| 96 | zvsold (:,:,:) = v_s(:,:,:) |
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| 97 | zsmvold(:,:) = SUM( smv_i(:,:,:), dim=3 ) |
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| 98 | zeiold (:,:) = et_i(:,:) |
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| 99 | zesold (:,:) = et_s(:,:) |
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[8409] | 100 | |
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[8504] | 101 | ! Thickness correction init. |
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[8409] | 102 | zatold(:,:) = at_i |
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[8500] | 103 | WHERE( a_i(:,:,:) >= epsi20 ) |
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| 104 | ht_i(:,:,:) = v_i(:,:,:) / a_i(:,:,:) |
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| 105 | ht_s(:,:,:) = v_s(:,:,:) / a_i(:,:,:) |
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| 106 | ELSEWHERE |
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| 107 | ht_i(:,:,:) = 0._wp |
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| 108 | ht_s(:,:,:) = 0._wp |
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| 109 | END WHERE |
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| 110 | |
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[8504] | 111 | ! Record max of the surrounding ice thicknesses for correction in case advection creates ice too thick |
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[8409] | 112 | zhimax(:,:,:) = ht_i(:,:,:) + ht_s(:,:,:) |
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| 113 | DO jl = 1, jpl |
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| 114 | DO jj = 2, jpjm1 |
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| 115 | DO ji = 2, jpim1 |
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[8486] | 116 | !!gm use of MAXVAL here is very probably less efficient than expending the 9 values |
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[8500] | 117 | zhimax(ji,jj,jl) = MAX( epsi20, MAXVAL( ht_i(ji-1:ji+1,jj-1:jj+1,jl) + ht_s(ji-1:ji+1,jj-1:jj+1,jl) ) ) |
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[8409] | 118 | END DO |
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| 119 | END DO |
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| 120 | END DO |
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| 121 | CALL lbc_lnk( zhimax(:,:,:), 'T', 1. ) |
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| 122 | |
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[8504] | 123 | !---------- |
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| 124 | ! Advection |
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| 125 | !---------- |
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[8512] | 126 | IF( ln_adv_UMx ) THEN !-- ULTIMATE-MACHO scheme |
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[8504] | 127 | CALL ice_adv_umx( kt, u_ice, v_ice, & |
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| 128 | & ato_i, v_i, v_s, smv_i, oa_i, a_i, a_ip, v_ip, e_s, e_i ) |
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[8409] | 129 | |
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[8512] | 130 | ELSEIF( ln_adv_Pra ) THEN !-- PRATHER scheme |
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[8504] | 131 | CALL ice_adv_prather( kt, u_ice, v_ice, & |
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| 132 | & ato_i, v_i, v_s, smv_i, oa_i, a_i, a_ip, v_ip, e_s, e_i ) |
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[8409] | 133 | |
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[8512] | 134 | ENDIF |
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[8409] | 135 | |
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[8504] | 136 | ! total ice fraction |
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| 137 | at_i(:,:) = a_i(:,:,1) |
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| 138 | DO jl = 2, jpl |
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| 139 | at_i(:,:) = at_i(:,:) + a_i(:,:,jl) |
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| 140 | END DO |
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[8409] | 141 | |
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[8504] | 142 | !------------ |
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| 143 | ! diagnostics |
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| 144 | !------------ |
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[8409] | 145 | DO jj = 1, jpj |
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| 146 | DO ji = 1, jpi |
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| 147 | diag_trp_ei (ji,jj) = ( SUM( e_i (ji,jj,1:nlay_i,:) ) - zeiold(ji,jj) ) * r1_rdtice |
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| 148 | diag_trp_es (ji,jj) = ( SUM( e_s (ji,jj,1:nlay_s,:) ) - zesold(ji,jj) ) * r1_rdtice |
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| 149 | diag_trp_smv(ji,jj) = ( SUM( smv_i(ji,jj,:) ) - zsmvold(ji,jj) ) * r1_rdtice |
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| 150 | diag_trp_vi (ji,jj) = SUM( v_i(ji,jj,:) - zviold(ji,jj,:) ) * r1_rdtice |
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| 151 | diag_trp_vs (ji,jj) = SUM( v_s(ji,jj,:) - zvsold(ji,jj,:) ) * r1_rdtice |
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| 152 | END DO |
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| 153 | END DO |
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[8500] | 154 | IF( iom_use('icetrp') ) CALL iom_put( "icetrp" , diag_trp_vi * rday ) ! ice volume transport |
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| 155 | IF( iom_use('snwtrp') ) CALL iom_put( "snwtrp" , diag_trp_vs * rday ) ! snw volume transport |
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| 156 | IF( iom_use('saltrp') ) CALL iom_put( "saltrp" , diag_trp_smv * rday * rhoic ) ! salt content transport |
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| 157 | IF( iom_use('deitrp') ) CALL iom_put( "deitrp" , diag_trp_ei ) ! advected ice enthalpy (W/m2) |
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| 158 | IF( iom_use('destrp') ) CALL iom_put( "destrp" , diag_trp_es ) ! advected snw enthalpy (W/m2) |
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[8409] | 159 | |
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[8504] | 160 | !-------------------------------------- |
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| 161 | ! Thickness correction in case too high |
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| 162 | !-------------------------------------- |
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[8512] | 163 | IF( nn_icedyn == 2 ) THEN |
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[8486] | 164 | ! |
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[8504] | 165 | CALL ice_var_zapsmall !-- zap small areas |
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[8486] | 166 | ! |
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[8504] | 167 | DO jl = 1, jpl |
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[8409] | 168 | DO jj = 1, jpj |
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| 169 | DO ji = 1, jpi |
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[8504] | 170 | IF ( v_i(ji,jj,jl) > 0._wp ) THEN !-- bound to zhimax |
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[8486] | 171 | ! |
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[8500] | 172 | ht_i (ji,jj,jl) = v_i (ji,jj,jl) / a_i(ji,jj,jl) |
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| 173 | ht_s (ji,jj,jl) = v_s (ji,jj,jl) / a_i(ji,jj,jl) |
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| 174 | zdv = v_i(ji,jj,jl) + v_s(ji,jj,jl) - zviold(ji,jj,jl) - zvsold(ji,jj,jl) |
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[8486] | 175 | ! |
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[8409] | 176 | IF ( ( zdv > 0.0 .AND. (ht_i(ji,jj,jl)+ht_s(ji,jj,jl)) > zhimax(ji,jj,jl) .AND. zatold(ji,jj) < 0.80 ) .OR. & |
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| 177 | & ( zdv <= 0.0 .AND. (ht_i(ji,jj,jl)+ht_s(ji,jj,jl)) > zhimax(ji,jj,jl) ) ) THEN |
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[8500] | 178 | a_i (ji,jj,jl) = ( v_i(ji,jj,jl) + v_s(ji,jj,jl) ) / zhimax(ji,jj,jl) |
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| 179 | ht_i(ji,jj,jl) = v_i(ji,jj,jl) / a_i(ji,jj,jl) |
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[8409] | 180 | ENDIF |
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[8486] | 181 | ! |
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[8409] | 182 | ENDIF |
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| 183 | END DO |
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| 184 | END DO |
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| 185 | END DO |
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[8500] | 186 | |
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[8504] | 187 | WHERE( ht_i(:,:,jpl) > hi_max(jpl) ) !-- bound ht_i to hi_max (99 m) |
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[8500] | 188 | ht_i(:,:,jpl) = hi_max(jpl) |
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| 189 | a_i (:,:,jpl) = v_i(:,:,jpl) / hi_max(jpl) |
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| 190 | END WHERE |
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| 191 | |
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[8504] | 192 | IF ( nn_pnd_scheme > 0 ) THEN !-- correct pond fraction to avoid a_ip > a_i |
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[8500] | 193 | WHERE( a_ip(:,:,:) > a_i(:,:,:) ) a_ip(:,:,:) = a_i(:,:,:) |
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| 194 | ENDIF |
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[8486] | 195 | ! |
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[8409] | 196 | ENDIF |
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| 197 | |
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| 198 | !------------------------------------------------------------ |
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| 199 | ! Impose a_i < amax if no ridging/rafting or in mono-category |
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| 200 | !------------------------------------------------------------ |
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[8504] | 201 | IF( l_piling ) THEN !-- simple conservative piling, comparable with 1-cat models |
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[8486] | 202 | at_i(:,:) = SUM( a_i(:,:,:), dim=3 ) |
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[8409] | 203 | DO jl = 1, jpl |
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[8500] | 204 | WHERE( at_i(:,:) > epsi20 ) |
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| 205 | a_i(:,:,jl) = a_i(:,:,jl) * ( 1._wp + MIN( rn_amax_2d(:,:) - at_i(:,:) , 0._wp ) / at_i(:,:) ) |
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| 206 | END WHERE |
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[8409] | 207 | END DO |
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| 208 | ENDIF |
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| 209 | |
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[8504] | 210 | ! agglomerate variables |
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[8409] | 211 | vt_i(:,:) = SUM( v_i(:,:,:), dim=3 ) |
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| 212 | vt_s(:,:) = SUM( v_s(:,:,:), dim=3 ) |
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| 213 | at_i(:,:) = SUM( a_i(:,:,:), dim=3 ) |
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| 214 | |
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| 215 | ! MV MP 2016 (remove once we get rid of a_i_frac and ht_i) |
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| 216 | IF ( nn_pnd_scheme > 0 ) THEN |
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| 217 | at_ip(:,:) = SUM( a_ip(:,:,:), dim = 3 ) |
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| 218 | vt_ip(:,:) = SUM( v_ip(:,:,:), dim = 3 ) |
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| 219 | ENDIF |
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| 220 | ! END MP 2016 |
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| 221 | |
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[8504] | 222 | ! open water = 1 if at_i=0 |
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[8409] | 223 | WHERE( at_i == 0._wp ) ato_i = 1._wp |
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| 224 | |
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| 225 | ! conservation test |
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[8514] | 226 | IF( ln_icediachk ) CALL ice_cons_hsm(1, 'iceadv', zvi_b, zsmv_b, zei_b, zfw_b, zfs_b, zft_b) |
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[8409] | 227 | |
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[8504] | 228 | ! -------------- |
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[8409] | 229 | ! control prints |
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[8504] | 230 | ! -------------- |
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[8514] | 231 | IF( ln_icectl ) CALL ice_prt( kt, iiceprt, jiceprt,-1, ' - ice dyn & trp - ' ) |
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[8409] | 232 | ! |
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| 233 | IF( nn_timing == 1 ) CALL timing_stop('iceadv') |
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| 234 | ! |
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| 235 | END SUBROUTINE ice_adv |
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| 236 | |
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[8512] | 237 | |
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| 238 | SUBROUTINE ice_adv_init |
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| 239 | !!------------------------------------------------------------------- |
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| 240 | !! *** ROUTINE ice_adv_init *** |
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| 241 | !! |
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| 242 | !! ** Purpose : Physical constants and parameters linked to the ice |
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| 243 | !! dynamics |
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| 244 | !! |
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| 245 | !! ** Method : Read the namice_adv namelist and check the ice-dynamic |
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| 246 | !! parameter values called at the first timestep (nit000) |
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| 247 | !! |
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| 248 | !! ** input : Namelist namice_adv |
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| 249 | !!------------------------------------------------------------------- |
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| 250 | INTEGER :: ios ! Local integer output status for namelist read |
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| 251 | !! |
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| 252 | NAMELIST/namice_adv/ ln_icedyn, nn_icedyn, rn_uice, rn_vice, ln_adv_Pra, ln_adv_UMx, nn_UMx |
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| 253 | !!------------------------------------------------------------------- |
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| 254 | ! |
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| 255 | REWIND( numnam_ice_ref ) ! Namelist namice_adv in reference namelist : Ice dynamics |
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| 256 | READ ( numnam_ice_ref, namice_adv, IOSTAT = ios, ERR = 901) |
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| 257 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namice_adv in reference namelist', lwp ) |
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| 258 | ! |
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| 259 | REWIND( numnam_ice_cfg ) ! Namelist namice_adv in configuration namelist : Ice dynamics |
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| 260 | READ ( numnam_ice_cfg, namice_adv, IOSTAT = ios, ERR = 902 ) |
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| 261 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namice_adv in configuration namelist', lwp ) |
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| 262 | IF(lwm) WRITE ( numoni, namice_adv ) |
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| 263 | ! |
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| 264 | IF(lwp) THEN ! control print |
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| 265 | WRITE(numout,*) |
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[8514] | 266 | WRITE(numout,*) 'ice_adv_init: ice parameters for ice dynamics ' |
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[8512] | 267 | WRITE(numout,*) '~~~~~~~~~~~~' |
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| 268 | WRITE(numout,*) ' Namelist namice_adv' |
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| 269 | WRITE(numout,*) ' Ice dynamics (T) or not (F) ln_icedyn = ', ln_icedyn |
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| 270 | WRITE(numout,*) ' associated switch nn_icedyn = ', nn_icedyn |
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| 271 | WRITE(numout,*) ' =2 all processes (default option)' |
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| 272 | WRITE(numout,*) ' =1 advection only (no ridging/rafting)' |
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| 273 | WRITE(numout,*) ' =0 advection only with prescribed velocity given by ' |
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| 274 | WRITE(numout,*) ' a uniform field (u,v)_ice = (rn_uice,rn_vice) = (', rn_uice,',', rn_vice,')' |
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| 275 | WRITE(numout,*) ' advection scheme for ice transport (limtrp)' |
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| 276 | WRITE(numout,*) ' type of advection scheme (Prather) ln_adv_Pra = ', ln_adv_Pra |
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| 277 | WRITE(numout,*) ' type of advection scheme (Ulimate-Macho) ln_adv_UMx = ', ln_adv_UMx |
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| 278 | WRITE(numout,*) ' order of the Ultimate-Macho scheme nn_UMx = ', nn_UMx |
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| 279 | ENDIF |
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| 280 | ! |
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| 281 | ! ! set the choice of ice dynamics |
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| 282 | IF( lk_c1d .OR. .NOT. ln_icedyn ) THEN |
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| 283 | nice_dyn = np_dynNO !--- no dynamics |
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| 284 | ELSE |
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| 285 | SELECT CASE( nn_icedyn ) |
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| 286 | CASE( 2 ) |
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| 287 | IF( nn_monocat /= 2 ) THEN !--- full dynamics (rheology + advection + ridging/rafting + correction) |
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| 288 | nice_dyn = np_dynFULL |
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| 289 | ELSE |
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| 290 | nice_dyn = np_dyn !--- dynamics without ridging/rafting |
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| 291 | ENDIF |
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| 292 | CASE( 0 , 1 ) !--- dynamics without ridging/rafting and correction |
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| 293 | nice_dyn = np_dynPURE |
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| 294 | END SELECT |
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| 295 | ENDIF |
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| 296 | ! !--- simple conservative piling, comparable with LIM2 |
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| 297 | l_piling = nn_icedyn == 1 .OR. ( nn_monocat == 2 .AND. jpl == 1 ) |
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| 298 | ! |
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| 299 | IF ( ( ln_adv_Pra .AND. ln_adv_UMx ) .OR. ( .NOT.ln_adv_Pra .AND. .NOT.ln_adv_UMx ) ) THEN |
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| 300 | CALL ctl_stop( 'ice_adv_init: choose one and only one ice advection scheme (ln_adv_Pra or ln_adv_UMx)' ) |
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| 301 | ENDIF |
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| 302 | ! |
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| 303 | END SUBROUTINE ice_adv_init |
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| 304 | |
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[8409] | 305 | #else |
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| 306 | !!---------------------------------------------------------------------- |
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| 307 | !! Default option Empty Module No sea-ice model |
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| 308 | !!---------------------------------------------------------------------- |
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| 309 | #endif |
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[8486] | 310 | |
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[8409] | 311 | !!====================================================================== |
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| 312 | END MODULE iceadv |
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| 313 | |
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