[4045] | 1 | MODULE limupdate2 |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE limupdate2 *** |
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| 4 | !! LIM-3 : Update of sea-ice global variables at the end of the time step |
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| 5 | !!====================================================================== |
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| 6 | !! History : 3.0 ! 2006-04 (M. Vancoppenolle) Original code |
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[5123] | 7 | !! 3.5 ! 2014-06 (C. Rousset) Complete rewriting/cleaning |
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[4045] | 8 | !!---------------------------------------------------------------------- |
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| 9 | #if defined key_lim3 |
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| 10 | !!---------------------------------------------------------------------- |
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| 11 | !! 'key_lim3' LIM3 sea-ice model |
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| 12 | !!---------------------------------------------------------------------- |
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| 13 | !! lim_update2 : computes update of sea-ice global variables from trend terms |
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| 14 | !!---------------------------------------------------------------------- |
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| 15 | USE sbc_oce ! Surface boundary condition: ocean fields |
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| 16 | USE sbc_ice ! Surface boundary condition: ice fields |
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[5123] | 17 | USE dom_oce |
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[4045] | 18 | USE phycst ! physical constants |
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| 19 | USE ice |
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| 20 | USE thd_ice ! LIM thermodynamic sea-ice variables |
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| 21 | USE limitd_th |
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| 22 | USE limvar |
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[5123] | 23 | USE lbclnk ! lateral boundary condition - MPP exchanges |
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| 24 | USE wrk_nemo ! work arrays |
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[4072] | 25 | USE timing ! Timing |
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[5123] | 26 | USE limcons ! conservation tests |
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| 27 | USE limctl |
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| 28 | USE lib_mpp ! MPP library |
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| 29 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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| 30 | USE in_out_manager |
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[4045] | 31 | |
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| 32 | IMPLICIT NONE |
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| 33 | PRIVATE |
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| 34 | |
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| 35 | PUBLIC lim_update2 ! routine called by ice_step |
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| 36 | |
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| 37 | !! * Substitutions |
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| 38 | # include "vectopt_loop_substitute.h90" |
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| 39 | !!---------------------------------------------------------------------- |
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| 40 | !! NEMO/LIM3 4.0 , UCL - NEMO Consortium (2011) |
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[5215] | 41 | !! $Id$ |
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[4045] | 42 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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| 43 | !!---------------------------------------------------------------------- |
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| 44 | CONTAINS |
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| 45 | |
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[5123] | 46 | SUBROUTINE lim_update2( kt ) |
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[4045] | 47 | !!------------------------------------------------------------------- |
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| 48 | !! *** ROUTINE lim_update2 *** |
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| 49 | !! |
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| 50 | !! ** Purpose : Computes update of sea-ice global variables at |
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| 51 | !! the end of the time step. |
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| 52 | !! |
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| 53 | !!--------------------------------------------------------------------- |
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[5123] | 54 | INTEGER, INTENT(in) :: kt ! number of iteration |
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| 55 | INTEGER :: ji, jj, jk, jl ! dummy loop indices |
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[5134] | 56 | REAL(wp) :: zsal |
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[5123] | 57 | REAL(wp) :: zvi_b, zsmv_b, zei_b, zfs_b, zfw_b, zft_b |
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[4045] | 58 | !!------------------------------------------------------------------- |
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[4072] | 59 | IF( nn_timing == 1 ) CALL timing_start('limupdate2') |
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[4045] | 60 | |
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[5123] | 61 | IF( kt == nit000 .AND. lwp ) THEN |
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[7646] | 62 | WRITE(numout,*)'' |
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| 63 | WRITE(numout,*)' lim_update2 ' |
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| 64 | WRITE(numout,*)' ~~~~~~~~~~~ ' |
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[5123] | 65 | ENDIF |
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| 66 | |
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[4688] | 67 | ! conservation test |
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[7646] | 68 | IF( ln_limdiachk ) CALL lim_cons_hsm(0, 'limupdate2', zvi_b, zsmv_b, zei_b, zfw_b, zfs_b, zft_b) |
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[4045] | 69 | |
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[4688] | 70 | !---------------------------------------------------------------------- |
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[5123] | 71 | ! Constrain the thickness of the smallest category above himin |
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[4688] | 72 | !---------------------------------------------------------------------- |
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[4869] | 73 | DO jj = 1, jpj |
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| 74 | DO ji = 1, jpi |
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[5167] | 75 | rswitch = MAX( 0._wp , SIGN( 1._wp, a_i(ji,jj,1) - epsi20 ) ) !0 if no ice and 1 if yes |
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| 76 | ht_i(ji,jj,1) = v_i (ji,jj,1) / MAX( a_i(ji,jj,1) , epsi20 ) * rswitch |
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[5123] | 77 | IF( v_i(ji,jj,1) > 0._wp .AND. ht_i(ji,jj,1) < rn_himin ) THEN |
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[5202] | 78 | a_i (ji,jj,1) = a_i (ji,jj,1) * ht_i(ji,jj,1) / rn_himin |
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| 79 | oa_i(ji,jj,1) = oa_i(ji,jj,1) * ht_i(ji,jj,1) / rn_himin |
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[4869] | 80 | ENDIF |
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| 81 | END DO |
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| 82 | END DO |
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[4688] | 83 | |
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| 84 | !----------------------------------------------------- |
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| 85 | ! ice concentration should not exceed amax |
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| 86 | !----------------------------------------------------- |
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[7753] | 87 | at_i(:,:) = 0._wp |
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[4045] | 88 | DO jl = 1, jpl |
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[7753] | 89 | at_i(:,:) = a_i(:,:,jl) + at_i(:,:) |
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[4045] | 90 | END DO |
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[4688] | 91 | |
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| 92 | DO jl = 1, jpl |
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| 93 | DO jj = 1, jpj |
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| 94 | DO ji = 1, jpi |
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[6403] | 95 | IF( at_i(ji,jj) > rn_amax_2d(ji,jj) .AND. a_i(ji,jj,jl) > 0._wp ) THEN |
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| 96 | a_i (ji,jj,jl) = a_i (ji,jj,jl) * ( 1._wp - ( 1._wp - rn_amax_2d(ji,jj) / at_i(ji,jj) ) ) |
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| 97 | oa_i(ji,jj,jl) = oa_i(ji,jj,jl) * ( 1._wp - ( 1._wp - rn_amax_2d(ji,jj) / at_i(ji,jj) ) ) |
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[4688] | 98 | ENDIF |
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[4045] | 99 | END DO |
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| 100 | END DO |
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| 101 | END DO |
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[4688] | 102 | |
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[4045] | 103 | !--------------------- |
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[5123] | 104 | ! Ice salinity |
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[4045] | 105 | !--------------------- |
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[5123] | 106 | IF ( nn_icesal == 2 ) THEN |
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[4045] | 107 | DO jl = 1, jpl |
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[4688] | 108 | DO jj = 1, jpj |
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| 109 | DO ji = 1, jpi |
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| 110 | zsal = smv_i(ji,jj,jl) |
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| 111 | ! salinity stays in bounds |
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[5123] | 112 | rswitch = 1._wp - MAX( 0._wp, SIGN( 1._wp, - v_i(ji,jj,jl) ) ) |
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[5134] | 113 | smv_i(ji,jj,jl) = rswitch * MAX( MIN( rn_simax * v_i(ji,jj,jl), smv_i(ji,jj,jl) ), rn_simin * v_i(ji,jj,jl) ) |
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[4688] | 114 | ! associated salt flux |
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| 115 | sfx_res(ji,jj) = sfx_res(ji,jj) - ( smv_i(ji,jj,jl) - zsal ) * rhoic * r1_rdtice |
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[5134] | 116 | END DO |
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| 117 | END DO |
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| 118 | END DO |
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[4045] | 119 | ENDIF |
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| 120 | |
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[5167] | 121 | !---------------------------------------------------- |
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| 122 | ! Rebin categories with thickness out of bounds |
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| 123 | !---------------------------------------------------- |
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| 124 | IF ( jpl > 1 ) CALL lim_itd_th_reb( 1, jpl ) |
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| 125 | |
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| 126 | !----------------- |
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| 127 | ! zap small values |
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| 128 | !----------------- |
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| 129 | CALL lim_var_zapsmall |
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| 130 | |
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[4045] | 131 | !------------------------------------------------------------------------------ |
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[5123] | 132 | ! Corrections to avoid wrong values | |
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[4045] | 133 | !------------------------------------------------------------------------------ |
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| 134 | ! Ice drift |
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| 135 | !------------ |
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| 136 | DO jj = 2, jpjm1 |
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[4072] | 137 | DO ji = 2, jpim1 |
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[4688] | 138 | IF ( at_i(ji,jj) == 0._wp ) THEN ! what to do if there is no ice |
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| 139 | IF ( at_i(ji+1,jj) == 0._wp ) u_ice(ji,jj) = 0._wp ! right side |
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| 140 | IF ( at_i(ji-1,jj) == 0._wp ) u_ice(ji-1,jj) = 0._wp ! left side |
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| 141 | IF ( at_i(ji,jj+1) == 0._wp ) v_ice(ji,jj) = 0._wp ! upper side |
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| 142 | IF ( at_i(ji,jj-1) == 0._wp ) v_ice(ji,jj-1) = 0._wp ! bottom side |
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[4045] | 143 | ENDIF |
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| 144 | END DO |
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| 145 | END DO |
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[4072] | 146 | !lateral boundary conditions |
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| 147 | CALL lbc_lnk( u_ice(:,:), 'U', -1. ) |
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| 148 | CALL lbc_lnk( v_ice(:,:), 'V', -1. ) |
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[4045] | 149 | !mask velocities |
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[7753] | 150 | u_ice(:,:) = u_ice(:,:) * umask(:,:,1) |
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| 151 | v_ice(:,:) = v_ice(:,:) * vmask(:,:,1) |
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[4045] | 152 | |
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[4688] | 153 | ! ------------------------------------------------- |
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| 154 | ! Diagnostics |
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| 155 | ! ------------------------------------------------- |
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[5123] | 156 | DO jl = 1, jpl |
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[7753] | 157 | oa_i(:,:,jl) = oa_i(:,:,jl) + a_i(:,:,jl) * rdt_ice / rday ! ice natural aging |
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| 158 | afx_thd(:,:) = afx_thd(:,:) + ( a_i(:,:,jl) - a_i_b(:,:,jl) ) * r1_rdtice |
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[5123] | 159 | END DO |
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| 160 | afx_tot = afx_thd + afx_dyn |
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[4688] | 161 | |
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| 162 | DO jj = 1, jpj |
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| 163 | DO ji = 1, jpi |
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[5167] | 164 | ! heat content variation (W.m-2) |
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| 165 | diag_heat(ji,jj) = diag_heat(ji,jj) - & |
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| 166 | & ( SUM( e_i(ji,jj,1:nlay_i,:) - e_i_b(ji,jj,1:nlay_i,:) ) + & |
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| 167 | & SUM( e_s(ji,jj,1:nlay_s,:) - e_s_b(ji,jj,1:nlay_s,:) ) & |
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| 168 | & ) * r1_rdtice |
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| 169 | ! salt, volume |
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| 170 | diag_smvi(ji,jj) = diag_smvi(ji,jj) + SUM( smv_i(ji,jj,:) - smv_i_b(ji,jj,:) ) * rhoic * r1_rdtice |
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| 171 | diag_vice(ji,jj) = diag_vice(ji,jj) + SUM( v_i (ji,jj,:) - v_i_b (ji,jj,:) ) * rhoic * r1_rdtice |
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| 172 | diag_vsnw(ji,jj) = diag_vsnw(ji,jj) + SUM( v_s (ji,jj,:) - v_s_b (ji,jj,:) ) * rhosn * r1_rdtice |
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[4045] | 173 | END DO |
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| 174 | END DO |
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| 175 | |
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[5167] | 176 | ! conservation test |
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[7646] | 177 | IF( ln_limdiachk ) CALL lim_cons_hsm(1, 'limupdate2', zvi_b, zsmv_b, zei_b, zfw_b, zfs_b, zft_b) |
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[5167] | 178 | |
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[5123] | 179 | ! control prints |
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[7646] | 180 | IF( ln_limctl ) CALL lim_prt( kt, iiceprt, jiceprt, 2, ' - Final state - ' ) |
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| 181 | IF( ln_ctl ) CALL lim_prt3D( 'limupdate2' ) |
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[4045] | 182 | |
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[4688] | 183 | IF( nn_timing == 1 ) CALL timing_stop('limupdate2') |
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[4045] | 184 | |
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| 185 | END SUBROUTINE lim_update2 |
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[7646] | 186 | |
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[4045] | 187 | #else |
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| 188 | !!---------------------------------------------------------------------- |
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| 189 | !! Default option Empty Module No sea-ice model |
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| 190 | !!---------------------------------------------------------------------- |
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| 191 | CONTAINS |
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| 192 | SUBROUTINE lim_update2 ! Empty routine |
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| 193 | END SUBROUTINE lim_update2 |
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| 194 | |
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| 195 | #endif |
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| 196 | |
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| 197 | END MODULE limupdate2 |
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