[825] | 1 | MODULE limvar |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE limvar *** |
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| 4 | !! Different sets of ice model variables |
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| 5 | !! how to switch from one to another |
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| 6 | !! |
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| 7 | !! There are three sets of variables |
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| 8 | !! VGLO : global variables of the model |
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| 9 | !! - v_i (jpi,jpj,jpl) |
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| 10 | !! - v_s (jpi,jpj,jpl) |
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| 11 | !! - a_i (jpi,jpj,jpl) |
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| 12 | !! - t_s (jpi,jpj,jpl) |
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| 13 | !! - e_i (jpi,jpj,nlay_i,jpl) |
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| 14 | !! - smv_i(jpi,jpj,jpl) |
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| 15 | !! - oa_i (jpi,jpj,jpl) |
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| 16 | !! VEQV : equivalent variables sometimes used in the model |
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| 17 | !! - ht_i(jpi,jpj,jpl) |
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| 18 | !! - ht_s(jpi,jpj,jpl) |
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| 19 | !! - t_i (jpi,jpj,nlay_i,jpl) |
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| 20 | !! ... |
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| 21 | !! VAGG : aggregate variables, averaged/summed over all |
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| 22 | !! thickness categories |
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| 23 | !! - vt_i(jpi,jpj) |
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| 24 | !! - vt_s(jpi,jpj) |
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| 25 | !! - at_i(jpi,jpj) |
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| 26 | !! - et_s(jpi,jpj) !total snow heat content |
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| 27 | !! - et_i(jpi,jpj) !total ice thermal content |
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| 28 | !! - smt_i(jpi,jpj) !mean ice salinity |
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| 29 | !! - ot_i(jpi,jpj) !average ice age |
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| 30 | !!====================================================================== |
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[2715] | 31 | !! History : - ! 2006-01 (M. Vancoppenolle) Original code |
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| 32 | !! 4.0 ! 2011-02 (G. Madec) dynamical allocation |
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| 33 | !!---------------------------------------------------------------------- |
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[888] | 34 | #if defined key_lim3 |
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[825] | 35 | !!---------------------------------------------------------------------- |
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[2715] | 36 | !! 'key_lim3' LIM3 sea-ice model |
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| 37 | !!---------------------------------------------------------------------- |
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| 38 | !! lim_var_agg : |
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| 39 | !! lim_var_glo2eqv : |
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| 40 | !! lim_var_eqv2glo : |
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| 41 | !! lim_var_salprof : |
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| 42 | !! lim_var_salprof1d : |
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| 43 | !! lim_var_bv : |
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| 44 | !!---------------------------------------------------------------------- |
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[3625] | 45 | USE par_oce ! ocean parameters |
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| 46 | USE phycst ! physical constants (ocean directory) |
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| 47 | USE sbc_oce ! Surface boundary condition: ocean fields |
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| 48 | USE ice ! ice variables |
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| 49 | USE par_ice ! ice parameters |
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| 50 | USE thd_ice ! ice variables (thermodynamics) |
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| 51 | USE dom_ice ! ice domain |
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| 52 | USE in_out_manager ! I/O manager |
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| 53 | USE lib_mpp ! MPP library |
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| 54 | USE wrk_nemo ! work arrays |
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| 55 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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[921] | 56 | |
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[825] | 57 | IMPLICIT NONE |
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| 58 | PRIVATE |
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| 59 | |
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[2715] | 60 | PUBLIC lim_var_agg ! |
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| 61 | PUBLIC lim_var_glo2eqv ! |
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| 62 | PUBLIC lim_var_eqv2glo ! |
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| 63 | PUBLIC lim_var_salprof ! |
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[4161] | 64 | PUBLIC lim_var_icetm ! |
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[2715] | 65 | PUBLIC lim_var_bv ! |
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| 66 | PUBLIC lim_var_salprof1d ! |
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[825] | 67 | |
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| 68 | !!---------------------------------------------------------------------- |
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[4161] | 69 | !! NEMO/LIM3 4.0 , UCL - NEMO Consortium (2011) |
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[1156] | 70 | !! $Id$ |
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[2715] | 71 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[825] | 72 | !!---------------------------------------------------------------------- |
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| 73 | CONTAINS |
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| 74 | |
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[2715] | 75 | SUBROUTINE lim_var_agg( kn ) |
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[921] | 76 | !!------------------------------------------------------------------ |
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| 77 | !! *** ROUTINE lim_var_agg *** |
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[2715] | 78 | !! |
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| 79 | !! ** Purpose : aggregates ice-thickness-category variables to all-ice variables |
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| 80 | !! i.e. it turns VGLO into VAGG |
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[921] | 81 | !! ** Method : |
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| 82 | !! |
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| 83 | !! ** Arguments : n = 1, at_i vt_i only |
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| 84 | !! n = 2 everything |
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| 85 | !! |
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| 86 | !! note : you could add an argument when you need only at_i, vt_i |
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| 87 | !! and when you need everything |
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| 88 | !!------------------------------------------------------------------ |
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[2715] | 89 | INTEGER, INTENT( in ) :: kn ! =1 at_i & vt only ; = what is needed |
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| 90 | ! |
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| 91 | INTEGER :: ji, jj, jk, jl ! dummy loop indices |
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| 92 | !!------------------------------------------------------------------ |
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[825] | 93 | |
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[921] | 94 | !-------------------- |
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| 95 | ! Compute variables |
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| 96 | !-------------------- |
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[2715] | 97 | vt_i (:,:) = 0._wp |
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| 98 | vt_s (:,:) = 0._wp |
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| 99 | at_i (:,:) = 0._wp |
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| 100 | ato_i(:,:) = 1._wp |
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| 101 | ! |
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[921] | 102 | DO jl = 1, jpl |
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| 103 | DO jj = 1, jpj |
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| 104 | DO ji = 1, jpi |
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[2715] | 105 | ! |
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[921] | 106 | vt_i(ji,jj) = vt_i(ji,jj) + v_i(ji,jj,jl) ! ice volume |
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| 107 | vt_s(ji,jj) = vt_s(ji,jj) + v_s(ji,jj,jl) ! snow volume |
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| 108 | at_i(ji,jj) = at_i(ji,jj) + a_i(ji,jj,jl) ! ice concentration |
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[2715] | 109 | ! |
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[4990] | 110 | rswitch = MAX( 0._wp , SIGN( 1._wp , at_i(ji,jj) - epsi10 ) ) |
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| 111 | icethi(ji,jj) = vt_i(ji,jj) / MAX( at_i(ji,jj) , epsi10 ) * rswitch ! ice thickness |
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[921] | 112 | END DO |
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| 113 | END DO |
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| 114 | END DO |
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[825] | 115 | |
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[921] | 116 | DO jj = 1, jpj |
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| 117 | DO ji = 1, jpi |
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[2715] | 118 | ato_i(ji,jj) = MAX( 1._wp - at_i(ji,jj), 0._wp ) ! open water fraction |
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[921] | 119 | END DO |
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| 120 | END DO |
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[825] | 121 | |
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[2715] | 122 | IF( kn > 1 ) THEN |
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| 123 | et_s (:,:) = 0._wp |
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| 124 | ot_i (:,:) = 0._wp |
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| 125 | smt_i(:,:) = 0._wp |
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| 126 | et_i (:,:) = 0._wp |
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| 127 | ! |
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[921] | 128 | DO jl = 1, jpl |
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| 129 | DO jj = 1, jpj |
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| 130 | DO ji = 1, jpi |
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[2715] | 131 | et_s(ji,jj) = et_s(ji,jj) + e_s(ji,jj,1,jl) ! snow heat content |
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[4990] | 132 | rswitch = MAX( 0._wp , SIGN( 1._wp , vt_i(ji,jj) - epsi10 ) ) |
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| 133 | smt_i(ji,jj) = smt_i(ji,jj) + smv_i(ji,jj,jl) / MAX( vt_i(ji,jj) , epsi10 ) * rswitch ! ice salinity |
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| 134 | rswitch = MAX( 0._wp , SIGN( 1._wp , at_i(ji,jj) - epsi10 ) ) |
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| 135 | ot_i(ji,jj) = ot_i(ji,jj) + oa_i(ji,jj,jl) / MAX( at_i(ji,jj) , epsi10 ) * rswitch ! ice age |
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[921] | 136 | END DO |
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| 137 | END DO |
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| 138 | END DO |
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[2715] | 139 | ! |
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[921] | 140 | DO jl = 1, jpl |
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| 141 | DO jk = 1, nlay_i |
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[2715] | 142 | et_i(:,:) = et_i(:,:) + e_i(:,:,jk,jl) ! ice heat content |
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[921] | 143 | END DO |
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| 144 | END DO |
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[2715] | 145 | ! |
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| 146 | ENDIF |
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| 147 | ! |
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[921] | 148 | END SUBROUTINE lim_var_agg |
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[825] | 149 | |
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| 150 | |
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[921] | 151 | SUBROUTINE lim_var_glo2eqv |
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| 152 | !!------------------------------------------------------------------ |
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[2715] | 153 | !! *** ROUTINE lim_var_glo2eqv *** |
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[921] | 154 | !! |
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[2715] | 155 | !! ** Purpose : computes equivalent variables as function of global variables |
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| 156 | !! i.e. it turns VGLO into VEQV |
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[921] | 157 | !!------------------------------------------------------------------ |
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[2715] | 158 | INTEGER :: ji, jj, jk, jl ! dummy loop indices |
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| 159 | REAL(wp) :: zq_i, zaaa, zbbb, zccc, zdiscrim ! local scalars |
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[4990] | 160 | REAL(wp) :: ztmelts, zq_s, zfac1, zfac2 ! - - |
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[2715] | 161 | !!------------------------------------------------------------------ |
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[825] | 162 | |
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| 163 | !------------------------------------------------------- |
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| 164 | ! Ice thickness, snow thickness, ice salinity, ice age |
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| 165 | !------------------------------------------------------- |
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| 166 | DO jl = 1, jpl |
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| 167 | DO jj = 1, jpj |
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| 168 | DO ji = 1, jpi |
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[4990] | 169 | rswitch = 1._wp - MAX( 0._wp , SIGN( 1._wp,- a_i(ji,jj,jl) + epsi10 ) ) !0 if no ice and 1 if yes |
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| 170 | ht_i(ji,jj,jl) = v_i (ji,jj,jl) / MAX( a_i(ji,jj,jl) , epsi10 ) * rswitch |
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| 171 | ht_s(ji,jj,jl) = v_s (ji,jj,jl) / MAX( a_i(ji,jj,jl) , epsi10 ) * rswitch |
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| 172 | o_i(ji,jj,jl) = oa_i(ji,jj,jl) / MAX( a_i(ji,jj,jl) , epsi10 ) * rswitch |
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[825] | 173 | END DO |
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| 174 | END DO |
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| 175 | END DO |
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| 176 | |
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[3625] | 177 | IF( num_sal == 2 )THEN |
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[921] | 178 | DO jl = 1, jpl |
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| 179 | DO jj = 1, jpj |
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| 180 | DO ji = 1, jpi |
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[4990] | 181 | rswitch = 1._wp - MAX( 0._wp , SIGN( 1._wp,- a_i(ji,jj,jl) + epsi10 ) ) !0 if no ice and 1 if yes |
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| 182 | sm_i(ji,jj,jl) = smv_i(ji,jj,jl) / MAX( v_i(ji,jj,jl) , epsi10 ) * rswitch |
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[921] | 183 | END DO |
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[825] | 184 | END DO |
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| 185 | END DO |
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| 186 | ENDIF |
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| 187 | |
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[2715] | 188 | CALL lim_var_salprof ! salinity profile |
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[825] | 189 | |
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| 190 | !------------------- |
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| 191 | ! Ice temperatures |
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| 192 | !------------------- |
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[868] | 193 | !CDIR NOVERRCHK |
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[825] | 194 | DO jl = 1, jpl |
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[868] | 195 | !CDIR NOVERRCHK |
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[921] | 196 | DO jk = 1, nlay_i |
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[868] | 197 | !CDIR NOVERRCHK |
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[921] | 198 | DO jj = 1, jpj |
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[868] | 199 | !CDIR NOVERRCHK |
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[921] | 200 | DO ji = 1, jpi |
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[2715] | 201 | ! ! Energy of melting q(S,T) [J.m-3] |
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[4990] | 202 | rswitch = 1.0 - MAX( 0.0 , SIGN( 1.0 , - v_i(ji,jj,jl) + epsi10 ) ) ! rswitch = 0 if no ice and 1 if yes |
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| 203 | zq_i = rswitch * e_i(ji,jj,jk,jl) / area(ji,jj) / MAX( v_i(ji,jj,jl) , epsi10 ) * REAL(nlay_i,wp) |
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[4688] | 204 | zq_i = zq_i * unit_fac !convert units |
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[2715] | 205 | ztmelts = -tmut * s_i(ji,jj,jk,jl) + rtt ! Ice layer melt temperature |
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| 206 | ! |
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| 207 | zaaa = cpic ! Conversion q(S,T) -> T (second order equation) |
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| 208 | zbbb = ( rcp - cpic ) * ( ztmelts - rtt ) + zq_i / rhoic - lfus |
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[921] | 209 | zccc = lfus * (ztmelts-rtt) |
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[2715] | 210 | zdiscrim = SQRT( MAX(zbbb*zbbb - 4._wp*zaaa*zccc , 0._wp) ) |
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[4990] | 211 | t_i(ji,jj,jk,jl) = rtt + rswitch *( - zbbb - zdiscrim ) / ( 2.0 *zaaa ) |
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[2715] | 212 | t_i(ji,jj,jk,jl) = MIN( rtt, MAX( 173.15_wp, t_i(ji,jj,jk,jl) ) ) ! 100-rtt < t_i < rtt |
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[921] | 213 | END DO |
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[825] | 214 | END DO |
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[921] | 215 | END DO |
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[825] | 216 | END DO |
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| 217 | |
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| 218 | !-------------------- |
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| 219 | ! Snow temperatures |
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| 220 | !-------------------- |
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[2715] | 221 | zfac1 = 1._wp / ( rhosn * cpic ) |
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[825] | 222 | zfac2 = lfus / cpic |
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| 223 | DO jl = 1, jpl |
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[921] | 224 | DO jk = 1, nlay_s |
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| 225 | DO jj = 1, jpj |
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| 226 | DO ji = 1, jpi |
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| 227 | !Energy of melting q(S,T) [J.m-3] |
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[4990] | 228 | rswitch = 1._wp - MAX( 0._wp , SIGN( 1._wp , - v_s(ji,jj,jl) + epsi10 ) ) ! rswitch = 0 if no ice and 1 if yes |
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| 229 | zq_s = rswitch * e_s(ji,jj,jk,jl) / ( area(ji,jj) * MAX( v_s(ji,jj,jl) , epsi10 ) ) * REAL(nlay_s,wp) |
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[4688] | 230 | zq_s = zq_s * unit_fac ! convert units |
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[2715] | 231 | ! |
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[4990] | 232 | t_s(ji,jj,jk,jl) = rtt + rswitch * ( - zfac1 * zq_s + zfac2 ) |
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[2715] | 233 | t_s(ji,jj,jk,jl) = MIN( rtt, MAX( 173.15, t_s(ji,jj,jk,jl) ) ) ! 100-rtt < t_i < rtt |
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[921] | 234 | END DO |
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[825] | 235 | END DO |
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[921] | 236 | END DO |
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[825] | 237 | END DO |
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| 238 | |
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| 239 | !------------------- |
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| 240 | ! Mean temperature |
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| 241 | !------------------- |
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[2715] | 242 | tm_i(:,:) = 0._wp |
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[825] | 243 | DO jl = 1, jpl |
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| 244 | DO jk = 1, nlay_i |
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| 245 | DO jj = 1, jpj |
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| 246 | DO ji = 1, jpi |
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[4990] | 247 | rswitch = ( 1._wp - MAX( 0._wp , SIGN( 1._wp , - vt_i(ji,jj) + epsi10 ) ) ) |
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| 248 | tm_i(ji,jj) = tm_i(ji,jj) + rswitch * t_i(ji,jj,jk,jl) * v_i(ji,jj,jl) & |
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[4161] | 249 | & / ( REAL(nlay_i,wp) * MAX( vt_i(ji,jj) , epsi10 ) ) |
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[825] | 250 | END DO |
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| 251 | END DO |
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| 252 | END DO |
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| 253 | END DO |
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[2715] | 254 | ! |
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[825] | 255 | END SUBROUTINE lim_var_glo2eqv |
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| 256 | |
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| 257 | |
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| 258 | SUBROUTINE lim_var_eqv2glo |
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[921] | 259 | !!------------------------------------------------------------------ |
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[2715] | 260 | !! *** ROUTINE lim_var_eqv2glo *** |
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| 261 | !! |
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| 262 | !! ** Purpose : computes global variables as function of equivalent variables |
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| 263 | !! i.e. it turns VEQV into VGLO |
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[921] | 264 | !! ** Method : |
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| 265 | !! |
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[2715] | 266 | !! ** History : (01-2006) Martin Vancoppenolle, UCL-ASTR |
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[921] | 267 | !!------------------------------------------------------------------ |
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[2715] | 268 | ! |
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[921] | 269 | v_i(:,:,:) = ht_i(:,:,:) * a_i(:,:,:) |
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| 270 | v_s(:,:,:) = ht_s(:,:,:) * a_i(:,:,:) |
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| 271 | smv_i(:,:,:) = sm_i(:,:,:) * v_i(:,:,:) |
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| 272 | oa_i (:,:,:) = o_i (:,:,:) * a_i(:,:,:) |
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[2715] | 273 | ! |
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[921] | 274 | END SUBROUTINE lim_var_eqv2glo |
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[825] | 275 | |
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| 276 | |
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[921] | 277 | SUBROUTINE lim_var_salprof |
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| 278 | !!------------------------------------------------------------------ |
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[2715] | 279 | !! *** ROUTINE lim_var_salprof *** |
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[921] | 280 | !! |
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[2715] | 281 | !! ** Purpose : computes salinity profile in function of bulk salinity |
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| 282 | !! |
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[921] | 283 | !! ** Method : If bulk salinity greater than s_i_1, |
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| 284 | !! the profile is assumed to be constant (S_inf) |
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| 285 | !! If bulk salinity lower than s_i_0, |
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| 286 | !! the profile is linear with 0 at the surface (S_zero) |
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| 287 | !! If it is between s_i_0 and s_i_1, it is a |
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| 288 | !! alpha-weighted linear combination of s_inf and s_zero |
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| 289 | !! |
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| 290 | !! ** References : Vancoppenolle et al., 2007 (in preparation) |
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| 291 | !!------------------------------------------------------------------ |
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[2715] | 292 | INTEGER :: ji, jj, jk, jl ! dummy loop index |
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| 293 | REAL(wp) :: dummy_fac0, dummy_fac1, dummy_fac, zsal ! local scalar |
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[4990] | 294 | REAL(wp) :: zswi0, zswi01, zswibal, zargtemp , zs_zero ! - - |
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[2715] | 295 | REAL(wp), POINTER, DIMENSION(:,:,:) :: z_slope_s, zalpha ! 3D pointer |
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| 296 | !!------------------------------------------------------------------ |
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[825] | 297 | |
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[3294] | 298 | CALL wrk_alloc( jpi, jpj, jpl, z_slope_s, zalpha ) |
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[825] | 299 | |
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| 300 | !--------------------------------------- |
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| 301 | ! Vertically constant, constant in time |
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| 302 | !--------------------------------------- |
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[3625] | 303 | IF( num_sal == 1 ) s_i(:,:,:,:) = bulk_sal |
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[825] | 304 | |
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| 305 | !----------------------------------- |
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| 306 | ! Salinity profile, varying in time |
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| 307 | !----------------------------------- |
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[3625] | 308 | IF( num_sal == 2 ) THEN |
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[2715] | 309 | ! |
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[825] | 310 | DO jk = 1, nlay_i |
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| 311 | s_i(:,:,jk,:) = sm_i(:,:,:) |
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[2715] | 312 | END DO |
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| 313 | ! |
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| 314 | DO jl = 1, jpl ! Slope of the linear profile |
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[825] | 315 | DO jj = 1, jpj |
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| 316 | DO ji = 1, jpi |
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[4688] | 317 | z_slope_s(ji,jj,jl) = 2._wp * sm_i(ji,jj,jl) / MAX( epsi10 , ht_i(ji,jj,jl) ) |
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[2715] | 318 | END DO |
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| 319 | END DO |
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| 320 | END DO |
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| 321 | ! |
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| 322 | dummy_fac0 = 1._wp / ( s_i_0 - s_i_1 ) ! Weighting factor between zs_zero and zs_inf |
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[825] | 323 | dummy_fac1 = s_i_1 / ( s_i_1 - s_i_0 ) |
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[3625] | 324 | ! |
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[2715] | 325 | zalpha(:,:,:) = 0._wp |
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[825] | 326 | DO jl = 1, jpl |
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| 327 | DO jj = 1, jpj |
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| 328 | DO ji = 1, jpi |
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[4990] | 329 | ! zswi0 = 1 if sm_i le s_i_0 and 0 otherwise |
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| 330 | zswi0 = MAX( 0._wp , SIGN( 1._wp , s_i_0 - sm_i(ji,jj,jl) ) ) |
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| 331 | ! zswi01 = 1 if sm_i is between s_i_0 and s_i_1 and 0 othws |
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| 332 | zswi01 = ( 1._wp - zswi0 ) * MAX( 0._wp , SIGN( 1._wp , s_i_1 - sm_i(ji,jj,jl) ) ) |
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| 333 | ! If 2.sm_i GE sss_m then zswibal = 1 |
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[4333] | 334 | ! this is to force a constant salinity profile in the Baltic Sea |
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[4990] | 335 | zswibal = MAX( 0._wp , SIGN( 1._wp , 2._wp * sm_i(ji,jj,jl) - sss_m(ji,jj) ) ) |
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| 336 | zalpha(ji,jj,jl) = zswi0 + zswi01 * ( sm_i(ji,jj,jl) * dummy_fac0 + dummy_fac1 ) |
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| 337 | zalpha(ji,jj,jl) = zalpha(ji,jj,jl) * ( 1._wp - zswibal ) |
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[825] | 338 | END DO |
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| 339 | END DO |
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| 340 | END DO |
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[4161] | 341 | |
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| 342 | dummy_fac = 1._wp / REAL( nlay_i ) ! Computation of the profile |
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[825] | 343 | DO jl = 1, jpl |
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| 344 | DO jk = 1, nlay_i |
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| 345 | DO jj = 1, jpj |
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| 346 | DO ji = 1, jpi |
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[2715] | 347 | ! ! linear profile with 0 at the surface |
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| 348 | zs_zero = z_slope_s(ji,jj,jl) * ( REAL(jk,wp) - 0.5_wp ) * ht_i(ji,jj,jl) * dummy_fac |
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| 349 | ! ! weighting the profile |
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| 350 | s_i(ji,jj,jk,jl) = zalpha(ji,jj,jl) * zs_zero + ( 1._wp - zalpha(ji,jj,jl) ) * sm_i(ji,jj,jl) |
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[825] | 351 | END DO ! ji |
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| 352 | END DO ! jj |
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| 353 | END DO ! jk |
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| 354 | END DO ! jl |
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[3625] | 355 | ! |
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[825] | 356 | ENDIF ! num_sal |
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| 357 | |
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| 358 | !------------------------------------------------------- |
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| 359 | ! Vertically varying salinity profile, constant in time |
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| 360 | !------------------------------------------------------- |
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[921] | 361 | |
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[3625] | 362 | IF( num_sal == 3 ) THEN ! Schwarzacher (1959) multiyear salinity profile (mean = 2.30) |
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[2715] | 363 | ! |
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| 364 | sm_i(:,:,:) = 2.30_wp |
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| 365 | ! |
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[825] | 366 | DO jl = 1, jpl |
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[868] | 367 | !CDIR NOVERRCHK |
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[825] | 368 | DO jk = 1, nlay_i |
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[2715] | 369 | zargtemp = ( REAL(jk,wp) - 0.5_wp ) / REAL(nlay_i,wp) |
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| 370 | zsal = 1.6_wp * ( 1._wp - COS( rpi * zargtemp**(0.407_wp/(0.573_wp+zargtemp)) ) ) |
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| 371 | s_i(:,:,jk,jl) = zsal |
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| 372 | END DO |
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| 373 | END DO |
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[3625] | 374 | ! |
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[825] | 375 | ENDIF ! num_sal |
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[2715] | 376 | ! |
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[3294] | 377 | CALL wrk_dealloc( jpi, jpj, jpl, z_slope_s, zalpha ) |
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[2715] | 378 | ! |
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[825] | 379 | END SUBROUTINE lim_var_salprof |
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| 380 | |
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| 381 | |
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[4161] | 382 | SUBROUTINE lim_var_icetm |
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| 383 | !!------------------------------------------------------------------ |
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| 384 | !! *** ROUTINE lim_var_icetm *** |
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| 385 | !! |
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| 386 | !! ** Purpose : computes mean sea ice temperature |
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| 387 | !!------------------------------------------------------------------ |
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| 388 | INTEGER :: ji, jj, jk, jl ! dummy loop indices |
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| 389 | !!------------------------------------------------------------------ |
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| 390 | |
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| 391 | ! Mean sea ice temperature |
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| 392 | tm_i(:,:) = 0._wp |
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| 393 | DO jl = 1, jpl |
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| 394 | DO jk = 1, nlay_i |
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| 395 | DO jj = 1, jpj |
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| 396 | DO ji = 1, jpi |
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[4990] | 397 | rswitch = ( 1._wp - MAX( 0._wp , SIGN( 1._wp , - vt_i(ji,jj) + epsi10 ) ) ) |
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| 398 | tm_i(ji,jj) = tm_i(ji,jj) + rswitch * t_i(ji,jj,jk,jl) * v_i(ji,jj,jl) & |
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[4161] | 399 | & / ( REAL(nlay_i,wp) * MAX( vt_i(ji,jj) , epsi10 ) ) |
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| 400 | END DO |
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| 401 | END DO |
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| 402 | END DO |
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| 403 | END DO |
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| 404 | |
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| 405 | END SUBROUTINE lim_var_icetm |
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| 406 | |
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| 407 | |
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[825] | 408 | SUBROUTINE lim_var_bv |
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[921] | 409 | !!------------------------------------------------------------------ |
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[2715] | 410 | !! *** ROUTINE lim_var_bv *** |
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[921] | 411 | !! |
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[2715] | 412 | !! ** Purpose : computes mean brine volume (%) in sea ice |
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| 413 | !! |
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[921] | 414 | !! ** Method : e = - 0.054 * S (ppt) / T (C) |
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| 415 | !! |
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[2715] | 416 | !! References : Vancoppenolle et al., JGR, 2007 |
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[921] | 417 | !!------------------------------------------------------------------ |
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[2715] | 418 | INTEGER :: ji, jj, jk, jl ! dummy loop indices |
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[4990] | 419 | REAL(wp) :: zbvi ! local scalars |
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[2715] | 420 | !!------------------------------------------------------------------ |
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| 421 | ! |
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| 422 | bv_i(:,:) = 0._wp |
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[921] | 423 | DO jl = 1, jpl |
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| 424 | DO jk = 1, nlay_i |
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| 425 | DO jj = 1, jpj |
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| 426 | DO ji = 1, jpi |
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[4990] | 427 | rswitch = ( 1._wp - MAX( 0._wp , SIGN( 1._wp , (t_i(ji,jj,jk,jl) - rtt) + epsi10 ) ) ) |
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| 428 | zbvi = - rswitch * tmut * s_i(ji,jj,jk,jl) / MIN( t_i(ji,jj,jk,jl) - rtt, - epsi10 ) & |
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[2715] | 429 | & * v_i(ji,jj,jl) / REAL(nlay_i,wp) |
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[4990] | 430 | rswitch = ( 1._wp - MAX( 0._wp , SIGN( 1._wp , - vt_i(ji,jj) + epsi10 ) ) ) |
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| 431 | bv_i(ji,jj) = bv_i(ji,jj) + rswitch * zbvi / MAX( vt_i(ji,jj) , epsi10 ) |
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[921] | 432 | END DO |
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| 433 | END DO |
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| 434 | END DO |
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| 435 | END DO |
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[2715] | 436 | ! |
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[921] | 437 | END SUBROUTINE lim_var_bv |
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[825] | 438 | |
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| 439 | |
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[2715] | 440 | SUBROUTINE lim_var_salprof1d( kideb, kiut ) |
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[825] | 441 | !!------------------------------------------------------------------- |
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| 442 | !! *** ROUTINE lim_thd_salprof1d *** |
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| 443 | !! |
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| 444 | !! ** Purpose : 1d computation of the sea ice salinity profile |
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[2715] | 445 | !! Works with 1d vectors and is used by thermodynamic modules |
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[825] | 446 | !!------------------------------------------------------------------- |
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[2715] | 447 | INTEGER, INTENT(in) :: kideb, kiut ! thickness category index |
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| 448 | ! |
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| 449 | INTEGER :: ji, jk ! dummy loop indices |
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[4161] | 450 | INTEGER :: ii, ij ! local integers |
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[2715] | 451 | REAL(wp) :: dummy_fac0, dummy_fac1, dummy_fac2, zargtemp, zsal ! local scalars |
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[4990] | 452 | REAL(wp) :: zalpha, zswi0, zswi01, zswibal, zs_zero ! - - |
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[2715] | 453 | ! |
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| 454 | REAL(wp), POINTER, DIMENSION(:) :: z_slope_s |
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| 455 | !!--------------------------------------------------------------------- |
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[825] | 456 | |
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[3294] | 457 | CALL wrk_alloc( jpij, z_slope_s ) |
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[825] | 458 | |
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| 459 | !--------------------------------------- |
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| 460 | ! Vertically constant, constant in time |
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| 461 | !--------------------------------------- |
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[4872] | 462 | IF( num_sal == 1 ) s_i_1d(:,:) = bulk_sal |
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[825] | 463 | |
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| 464 | !------------------------------------------------------ |
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| 465 | ! Vertically varying salinity profile, varying in time |
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| 466 | !------------------------------------------------------ |
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| 467 | |
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[3625] | 468 | IF( num_sal == 2 ) THEN |
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[2715] | 469 | ! |
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| 470 | DO ji = kideb, kiut ! Slope of the linear profile zs_zero |
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[4872] | 471 | z_slope_s(ji) = 2._wp * sm_i_1d(ji) / MAX( epsi10 , ht_i_1d(ji) ) |
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[2715] | 472 | END DO |
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[825] | 473 | |
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| 474 | ! Weighting factor between zs_zero and zs_inf |
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| 475 | !--------------------------------------------- |
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[2715] | 476 | dummy_fac0 = 1._wp / ( s_i_0 - s_i_1 ) |
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[825] | 477 | dummy_fac1 = s_i_1 / ( s_i_1 - s_i_0 ) |
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[2715] | 478 | dummy_fac2 = 1._wp / REAL(nlay_i,wp) |
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[825] | 479 | |
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[868] | 480 | !CDIR NOVERRCHK |
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[825] | 481 | DO jk = 1, nlay_i |
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[868] | 482 | !CDIR NOVERRCHK |
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[825] | 483 | DO ji = kideb, kiut |
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[4161] | 484 | ii = MOD( npb(ji) - 1 , jpi ) + 1 |
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| 485 | ij = ( npb(ji) - 1 ) / jpi + 1 |
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[4990] | 486 | ! zswi0 = 1 if sm_i le s_i_0 and 0 otherwise |
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| 487 | zswi0 = MAX( 0._wp , SIGN( 1._wp , s_i_0 - sm_i_1d(ji) ) ) |
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| 488 | ! zswi01 = 1 if sm_i is between s_i_0 and s_i_1 and 0 othws |
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| 489 | zswi01 = ( 1._wp - zswi0 ) * MAX( 0._wp , SIGN( 1._wp , s_i_1 - sm_i_1d(ji) ) ) |
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| 490 | ! if 2.sm_i GE sss_m then zswibal = 1 |
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[4333] | 491 | ! this is to force a constant salinity profile in the Baltic Sea |
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[4990] | 492 | zswibal = MAX( 0._wp , SIGN( 1._wp , 2._wp * sm_i_1d(ji) - sss_m(ii,ij) ) ) |
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[2715] | 493 | ! |
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[4990] | 494 | zalpha = ( zswi0 + zswi01 * ( sm_i_1d(ji) * dummy_fac0 + dummy_fac1 ) ) * ( 1.0 - zswibal ) |
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[2715] | 495 | ! |
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[4872] | 496 | zs_zero = z_slope_s(ji) * ( REAL(jk,wp) - 0.5_wp ) * ht_i_1d(ji) * dummy_fac2 |
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[825] | 497 | ! weighting the profile |
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[4872] | 498 | s_i_1d(ji,jk) = zalpha * zs_zero + ( 1._wp - zalpha ) * sm_i_1d(ji) |
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[825] | 499 | END DO ! ji |
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| 500 | END DO ! jk |
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| 501 | |
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| 502 | ENDIF ! num_sal |
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| 503 | |
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| 504 | !------------------------------------------------------- |
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| 505 | ! Vertically varying salinity profile, constant in time |
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| 506 | !------------------------------------------------------- |
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| 507 | |
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[2715] | 508 | IF( num_sal == 3 ) THEN ! Schwarzacher (1959) multiyear salinity profile (mean = 2.30) |
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| 509 | ! |
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[4872] | 510 | sm_i_1d(:) = 2.30_wp |
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[2715] | 511 | ! |
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[868] | 512 | !CDIR NOVERRCHK |
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[2715] | 513 | DO jk = 1, nlay_i |
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| 514 | zargtemp = ( REAL(jk,wp) - 0.5_wp ) / REAL(nlay_i,wp) |
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| 515 | zsal = 1.6_wp * ( 1._wp - COS( rpi * zargtemp**(0.407_wp/(0.573_wp+zargtemp)) ) ) |
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| 516 | DO ji = kideb, kiut |
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[4872] | 517 | s_i_1d(ji,jk) = zsal |
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[2715] | 518 | END DO |
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| 519 | END DO |
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| 520 | ! |
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| 521 | ENDIF |
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| 522 | ! |
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[3294] | 523 | CALL wrk_dealloc( jpij, z_slope_s ) |
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[2715] | 524 | ! |
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[825] | 525 | END SUBROUTINE lim_var_salprof1d |
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| 526 | |
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| 527 | #else |
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[2715] | 528 | !!---------------------------------------------------------------------- |
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| 529 | !! Default option Dummy module NO LIM3 sea-ice model |
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| 530 | !!---------------------------------------------------------------------- |
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[825] | 531 | CONTAINS |
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| 532 | SUBROUTINE lim_var_agg ! Empty routines |
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| 533 | END SUBROUTINE lim_var_agg |
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| 534 | SUBROUTINE lim_var_glo2eqv ! Empty routines |
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| 535 | END SUBROUTINE lim_var_glo2eqv |
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| 536 | SUBROUTINE lim_var_eqv2glo ! Empty routines |
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| 537 | END SUBROUTINE lim_var_eqv2glo |
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| 538 | SUBROUTINE lim_var_salprof ! Empty routines |
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| 539 | END SUBROUTINE lim_var_salprof |
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| 540 | SUBROUTINE lim_var_bv ! Emtpy routines |
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[921] | 541 | END SUBROUTINE lim_var_bv |
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[825] | 542 | SUBROUTINE lim_var_salprof1d ! Emtpy routines |
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| 543 | END SUBROUTINE lim_var_salprof1d |
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[2715] | 544 | #endif |
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[825] | 545 | |
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[2715] | 546 | !!====================================================================== |
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[834] | 547 | END MODULE limvar |
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