1 | MODULE limitd_th |
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2 | !!====================================================================== |
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3 | !! *** MODULE limitd_th *** |
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4 | !! Thermodynamics of ice thickness distribution |
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5 | !! computation of changes in g(h) |
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6 | !!====================================================================== |
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7 | !! History : - ! (W. H. Lipscomb and E.C. Hunke) CICE (c) original code |
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8 | !! 3.0 ! 2005-12 (M. Vancoppenolle) adaptation to LIM-3 |
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9 | !! - ! 2006-06 (M. Vancoppenolle) adaptation to include salt, age and types |
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10 | !! - ! 2007-04 (M. Vancoppenolle) Mass conservation checked |
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11 | !!---------------------------------------------------------------------- |
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12 | #if defined key_lim3 |
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13 | !!---------------------------------------------------------------------- |
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14 | !! 'key_lim3' : LIM3 sea-ice model |
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15 | !!---------------------------------------------------------------------- |
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16 | !! lim_itd_th : thermodynamics of ice thickness distribution |
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17 | !! lim_itd_th_rem : |
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18 | !! lim_itd_th_reb : |
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19 | !! lim_itd_fitline : |
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20 | !! lim_itd_shiftice : |
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21 | !!---------------------------------------------------------------------- |
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22 | USE dom_ice ! LIM-3 domain |
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23 | USE par_oce ! ocean parameters |
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24 | USE dom_oce ! ocean domain |
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25 | USE phycst ! physical constants (ocean directory) |
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26 | USE thd_ice ! LIM-3 thermodynamic variables |
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27 | USE ice ! LIM-3 variables |
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28 | USE par_ice ! LIM-3 parameters |
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29 | USE limthd_lac ! LIM-3 lateral accretion |
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30 | USE limvar ! LIM-3 variables |
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31 | USE limcons ! LIM-3 conservation |
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32 | USE prtctl ! Print control |
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33 | USE in_out_manager ! I/O manager |
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34 | USE lib_mpp ! MPP library |
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35 | USE wrk_nemo ! work arrays |
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36 | |
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37 | IMPLICIT NONE |
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38 | PRIVATE |
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39 | |
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40 | PUBLIC lim_itd_th ! called by ice_stp |
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41 | PUBLIC lim_itd_th_rem |
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42 | PUBLIC lim_itd_th_reb |
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43 | PUBLIC lim_itd_fitline |
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44 | PUBLIC lim_itd_shiftice |
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45 | |
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46 | REAL(wp) :: epsi20 = 1e-20_wp ! constant values |
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47 | REAL(wp) :: epsi13 = 1e-13_wp ! |
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48 | REAL(wp) :: epsi10 = 1e-10_wp ! |
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49 | |
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50 | !!---------------------------------------------------------------------- |
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51 | !! NEMO/LIM3 4.0 , UCL - NEMO Consortium (2010) |
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52 | !! $Id$ |
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53 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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54 | !!---------------------------------------------------------------------- |
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55 | CONTAINS |
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56 | |
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57 | SUBROUTINE lim_itd_th( kt ) |
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58 | !!------------------------------------------------------------------ |
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59 | !! *** ROUTINE lim_itd_th *** |
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60 | !! |
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61 | !! ** Purpose : computes the thermodynamics of ice thickness distribution |
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62 | !! |
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63 | !! ** Method : |
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64 | !!------------------------------------------------------------------ |
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65 | INTEGER, INTENT(in) :: kt ! time step index |
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66 | ! |
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67 | INTEGER :: jl, ja, jm, jbnd1, jbnd2 ! ice types dummy loop index |
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68 | |
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69 | !!------------------------------------------------------------------ |
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70 | |
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71 | IF( kt == nit000 .AND. lwp ) THEN |
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72 | WRITE(numout,*) |
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73 | WRITE(numout,*) 'lim_itd_th : Thermodynamics of the ice thickness distribution' |
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74 | WRITE(numout,*) '~~~~~~~~~~~' |
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75 | ENDIF |
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76 | |
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77 | !------------------------------------------------------------------------------| |
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78 | ! 1) Transport of ice between thickness categories. | |
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79 | !------------------------------------------------------------------------------| |
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80 | ! Given thermodynamic growth rates, transport ice between |
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81 | ! thickness categories. |
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82 | DO jm = 1, jpm |
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83 | jbnd1 = ice_cat_bounds(jm,1) |
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84 | jbnd2 = ice_cat_bounds(jm,2) |
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85 | IF( ice_ncat_types(jm) > 1 ) CALL lim_itd_th_rem( jbnd1, jbnd2, jm, kt ) |
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86 | END DO |
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87 | ! |
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88 | CALL lim_var_glo2eqv ! only for info |
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89 | CALL lim_var_agg(1) |
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90 | |
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91 | !------------------------------------------------------------------------------| |
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92 | ! 3) Add frazil ice growing in leads. |
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93 | !------------------------------------------------------------------------------| |
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94 | |
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95 | CALL lim_thd_lac |
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96 | CALL lim_var_glo2eqv ! only for info |
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97 | |
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98 | !---------------------------------------------------------------------------------------- |
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99 | ! 4) Computation of trend terms and get back to old values |
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100 | !---------------------------------------------------------------------------------------- |
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101 | |
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102 | !- Trend terms |
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103 | d_a_i_thd (:,:,:) = a_i(:,:,:) - old_a_i(:,:,:) |
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104 | d_v_s_thd (:,:,:) = v_s(:,:,:) - old_v_s(:,:,:) |
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105 | d_v_i_thd (:,:,:) = v_i(:,:,:) - old_v_i(:,:,:) |
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106 | d_e_s_thd(:,:,:,:) = e_s(:,:,:,:) - old_e_s(:,:,:,:) |
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107 | d_e_i_thd(:,:,:,:) = e_i(:,:,:,:) - old_e_i(:,:,:,:) |
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108 | |
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109 | d_smv_i_thd(:,:,:) = 0._wp |
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110 | IF( num_sal == 2 .OR. num_sal == 4 ) d_smv_i_thd(:,:,:) = smv_i(:,:,:) - old_smv_i(:,:,:) |
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111 | |
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112 | IF(ln_ctl) THEN ! Control print |
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113 | CALL prt_ctl_info(' ') |
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114 | CALL prt_ctl_info(' - Cell values : ') |
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115 | CALL prt_ctl_info(' ~~~~~~~~~~~~~ ') |
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116 | CALL prt_ctl(tab2d_1=area , clinfo1=' lim_itd_th : cell area :') |
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117 | CALL prt_ctl(tab2d_1=at_i , clinfo1=' lim_itd_th : at_i :') |
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118 | CALL prt_ctl(tab2d_1=vt_i , clinfo1=' lim_itd_th : vt_i :') |
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119 | CALL prt_ctl(tab2d_1=vt_s , clinfo1=' lim_itd_th : vt_s :') |
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120 | DO jl = 1, jpl |
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121 | CALL prt_ctl_info(' ') |
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122 | CALL prt_ctl_info(' - Category : ', ivar1=jl) |
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123 | CALL prt_ctl_info(' ~~~~~~~~~~') |
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124 | CALL prt_ctl(tab2d_1=a_i (:,:,jl) , clinfo1= ' lim_itd_th : a_i : ') |
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125 | CALL prt_ctl(tab2d_1=ht_i (:,:,jl) , clinfo1= ' lim_itd_th : ht_i : ') |
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126 | CALL prt_ctl(tab2d_1=ht_s (:,:,jl) , clinfo1= ' lim_itd_th : ht_s : ') |
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127 | CALL prt_ctl(tab2d_1=v_i (:,:,jl) , clinfo1= ' lim_itd_th : v_i : ') |
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128 | CALL prt_ctl(tab2d_1=v_s (:,:,jl) , clinfo1= ' lim_itd_th : v_s : ') |
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129 | CALL prt_ctl(tab2d_1=e_s (:,:,1,jl) , clinfo1= ' lim_itd_th : e_s : ') |
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130 | CALL prt_ctl(tab2d_1=t_su (:,:,jl) , clinfo1= ' lim_itd_th : t_su : ') |
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131 | CALL prt_ctl(tab2d_1=t_s (:,:,1,jl) , clinfo1= ' lim_itd_th : t_snow : ') |
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132 | CALL prt_ctl(tab2d_1=sm_i (:,:,jl) , clinfo1= ' lim_itd_th : sm_i : ') |
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133 | CALL prt_ctl(tab2d_1=smv_i (:,:,jl) , clinfo1= ' lim_itd_th : smv_i : ') |
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134 | DO ja = 1, nlay_i |
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135 | CALL prt_ctl_info(' ') |
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136 | CALL prt_ctl_info(' - Layer : ', ivar1=ja) |
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137 | CALL prt_ctl_info(' ~~~~~~~') |
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138 | CALL prt_ctl(tab2d_1=t_i(:,:,ja,jl) , clinfo1= ' lim_itd_th : t_i : ') |
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139 | CALL prt_ctl(tab2d_1=e_i(:,:,ja,jl) , clinfo1= ' lim_itd_th : e_i : ') |
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140 | END DO |
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141 | END DO |
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142 | ENDIF |
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143 | |
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144 | !- Recover Old values |
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145 | a_i(:,:,:) = old_a_i (:,:,:) |
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146 | v_s(:,:,:) = old_v_s (:,:,:) |
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147 | v_i(:,:,:) = old_v_i (:,:,:) |
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148 | e_s(:,:,:,:) = old_e_s (:,:,:,:) |
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149 | e_i(:,:,:,:) = old_e_i (:,:,:,:) |
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150 | ! |
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151 | IF( num_sal == 2 .OR. num_sal == 4 ) smv_i(:,:,:) = old_smv_i (:,:,:) |
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152 | ! |
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153 | END SUBROUTINE lim_itd_th |
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154 | ! |
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155 | |
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156 | SUBROUTINE lim_itd_th_rem( klbnd, kubnd, ntyp, kt ) |
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157 | !!------------------------------------------------------------------ |
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158 | !! *** ROUTINE lim_itd_th_rem *** |
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159 | !! |
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160 | !! ** Purpose : computes the redistribution of ice thickness |
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161 | !! after thermodynamic growth of ice thickness |
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162 | !! |
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163 | !! ** Method : Linear remapping |
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164 | !! |
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165 | !! References : W.H. Lipscomb, JGR 2001 |
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166 | !!------------------------------------------------------------------ |
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167 | INTEGER , INTENT (in) :: klbnd ! Start thickness category index point |
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168 | INTEGER , INTENT (in) :: kubnd ! End point on which the the computation is applied |
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169 | INTEGER , INTENT (in) :: ntyp ! Number of the type used |
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170 | INTEGER , INTENT (in) :: kt ! Ocean time step |
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171 | ! |
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172 | INTEGER :: ji, jj, jl ! dummy loop index |
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173 | INTEGER :: zji, zjj, nd ! local integer |
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174 | REAL(wp) :: zx1, zwk1, zdh0, zetamin, zdamax ! local scalars |
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175 | REAL(wp) :: zx2, zwk2, zda0, zetamax, zhimin ! - - |
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176 | REAL(wp) :: zx3, zareamin, zindb ! - - |
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177 | CHARACTER (len = 15) :: fieldid |
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178 | |
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179 | INTEGER , POINTER, DIMENSION(:,:,:) :: zdonor ! donor category index |
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180 | |
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181 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zdhice ! ice thickness increment |
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182 | REAL(wp), POINTER, DIMENSION(:,:,:) :: g0 ! coefficients for fitting the line of the ITD |
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183 | REAL(wp), POINTER, DIMENSION(:,:,:) :: g1 ! coefficients for fitting the line of the ITD |
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184 | REAL(wp), POINTER, DIMENSION(:,:,:) :: hL ! left boundary for the ITD for each thickness |
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185 | REAL(wp), POINTER, DIMENSION(:,:,:) :: hR ! left boundary for the ITD for each thickness |
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186 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zht_i_o ! old ice thickness |
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187 | REAL(wp), POINTER, DIMENSION(:,:,:) :: dummy_es |
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188 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zdaice, zdvice ! local increment of ice area and volume |
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189 | REAL(wp), POINTER, DIMENSION(:) :: zvetamin, zvetamax ! maximum values for etas |
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190 | INTEGER , POINTER, DIMENSION(:) :: nind_i, nind_j ! compressed indices for i/j directions |
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191 | INTEGER :: nbrem ! number of cells with ice to transfer |
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192 | REAL(wp) :: zslope ! used to compute local thermodynamic "speeds" |
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193 | REAL(wp), POINTER, DIMENSION(:,:) :: zhb0, zhb1 ! category boundaries for thinnes categories |
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194 | REAL(wp), POINTER, DIMENSION(:,:) :: vt_i_init, vt_i_final ! ice volume summed over categories |
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195 | REAL(wp), POINTER, DIMENSION(:,:) :: vt_s_init, vt_s_final ! snow volume summed over categories |
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196 | REAL(wp), POINTER, DIMENSION(:,:) :: et_i_init, et_i_final ! ice energy summed over categories |
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197 | REAL(wp), POINTER, DIMENSION(:,:) :: et_s_init, et_s_final ! snow energy summed over categories |
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198 | INTEGER , POINTER, DIMENSION(:,:) :: zremap_flag ! compute remapping or not ???? |
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199 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zhbnew ! new boundaries of ice categories |
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200 | !!------------------------------------------------------------------ |
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201 | |
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202 | CALL wrk_alloc( jpi,jpj, zremap_flag ) ! integer |
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203 | CALL wrk_alloc( jpi,jpj,jpl-1, zdonor ) ! integer |
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204 | CALL wrk_alloc( jpi,jpj,jpl, zdhice, g0, g1, hL, hR, zht_i_o, dummy_es ) |
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205 | CALL wrk_alloc( jpi,jpj,jpl-1, zdaice, zdvice ) |
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206 | CALL wrk_alloc( jpi,jpj,jpl+1, zhbnew, kkstart = 0 ) |
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207 | CALL wrk_alloc( (jpi+1)*(jpj+1), zvetamin, zvetamax ) |
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208 | CALL wrk_alloc( (jpi+1)*(jpj+1), nind_i, nind_j ) ! integer |
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209 | CALL wrk_alloc( jpi,jpj, zhb0,zhb1,vt_i_init,vt_i_final,vt_s_init,vt_s_final,et_i_init,et_i_final,et_s_init,et_s_final ) |
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210 | |
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211 | zhimin = 0.1 !minimum ice thickness tolerated by the model |
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212 | zareamin = epsi10 !minimum area in thickness categories tolerated by the conceptors of the model |
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213 | |
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214 | !!---------------------------------------------------------------------------------------------- |
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215 | !! 0) Conservation checkand changes in each ice category |
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216 | !!---------------------------------------------------------------------------------------------- |
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217 | IF( con_i ) THEN |
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218 | CALL lim_column_sum (jpl, v_i, vt_i_init) |
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219 | CALL lim_column_sum (jpl, v_s, vt_s_init) |
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220 | CALL lim_column_sum_energy (jpl, nlay_i, e_i, et_i_init) |
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221 | dummy_es(:,:,:) = e_s(:,:,1,:) |
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222 | CALL lim_column_sum (jpl, dummy_es(:,:,:) , et_s_init) |
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223 | ENDIF |
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224 | |
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225 | !!---------------------------------------------------------------------------------------------- |
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226 | !! 1) Compute thickness and changes in each ice category |
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227 | !!---------------------------------------------------------------------------------------------- |
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228 | IF( kt == nit000 .AND. lwp) THEN |
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229 | WRITE(numout,*) |
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230 | WRITE(numout,*) 'lim_itd_th_rem : Remapping the ice thickness distribution' |
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231 | WRITE(numout,*) '~~~~~~~~~~~~~~~' |
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232 | WRITE(numout,*) ' klbnd : ', klbnd |
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233 | WRITE(numout,*) ' kubnd : ', kubnd |
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234 | WRITE(numout,*) ' ntyp : ', ntyp |
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235 | ENDIF |
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236 | |
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237 | zdhice(:,:,:) = 0._wp |
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238 | DO jl = klbnd, kubnd |
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239 | DO jj = 1, jpj |
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240 | DO ji = 1, jpi |
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241 | zindb = 1.0-MAX(0.0,SIGN(1.0,-a_i(ji,jj,jl))) !0 if no ice and 1 if yes |
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242 | ht_i(ji,jj,jl) = v_i(ji,jj,jl) / MAX(a_i(ji,jj,jl),epsi10) * zindb |
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243 | zindb = 1.0-MAX(0.0,SIGN(1.0,-old_a_i(ji,jj,jl))) !0 if no ice and 1 if yes |
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244 | zht_i_o(ji,jj,jl) = old_v_i(ji,jj,jl) / MAX(old_a_i(ji,jj,jl),epsi10) * zindb |
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245 | IF( a_i(ji,jj,jl) > 1e-6 ) zdhice(ji,jj,jl) = ht_i(ji,jj,jl) - zht_i_o(ji,jj,jl) |
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246 | END DO |
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247 | END DO |
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248 | END DO |
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249 | |
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250 | !----------------------------------------------------------------------------------------------- |
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251 | ! 2) Compute fractional ice area in each grid cell |
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252 | !----------------------------------------------------------------------------------------------- |
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253 | at_i(:,:) = 0._wp |
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254 | DO jl = klbnd, kubnd |
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255 | at_i(:,:) = at_i(:,:) + a_i(:,:,jl) |
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256 | END DO |
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257 | |
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258 | !----------------------------------------------------------------------------------------------- |
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259 | ! 3) Identify grid cells with ice |
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260 | !----------------------------------------------------------------------------------------------- |
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261 | nbrem = 0 |
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262 | DO jj = 1, jpj |
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263 | DO ji = 1, jpi |
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264 | IF ( at_i(ji,jj) .gt. zareamin ) THEN |
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265 | nbrem = nbrem + 1 |
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266 | nind_i(nbrem) = ji |
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267 | nind_j(nbrem) = jj |
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268 | zremap_flag(ji,jj) = 1 |
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269 | ELSE |
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270 | zremap_flag(ji,jj) = 0 |
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271 | ENDIF |
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272 | END DO !ji |
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273 | END DO !jj |
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274 | |
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275 | !----------------------------------------------------------------------------------------------- |
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276 | ! 4) Compute new category boundaries |
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277 | !----------------------------------------------------------------------------------------------- |
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278 | !- 4.1 Compute category boundaries |
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279 | ! Tricky trick see limitd_me.F90 |
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280 | ! will be soon removed, CT |
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281 | ! hi_max(kubnd) = 999.99 |
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282 | zhbnew(:,:,:) = 0._wp |
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283 | |
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284 | DO jl = klbnd, kubnd - 1 |
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285 | DO ji = 1, nbrem |
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286 | zji = nind_i(ji) |
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287 | zjj = nind_j(ji) |
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288 | ! |
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289 | IF ( ( zht_i_o(zji,zjj,jl) .GT.epsi10 ) .AND. & |
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290 | ( zht_i_o(zji,zjj,jl+1).GT.epsi10 ) ) THEN |
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291 | !interpolate between adjacent category growth rates |
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292 | zslope = ( zdhice(zji,zjj,jl+1) - zdhice(zji,zjj,jl) ) / & |
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293 | ( zht_i_o (zji,zjj,jl+1) - zht_i_o (zji,zjj,jl) ) |
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294 | zhbnew(zji,zjj,jl) = hi_max(jl) + zdhice(zji,zjj,jl) + & |
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295 | zslope * ( hi_max(jl) - zht_i_o(zji,zjj,jl) ) |
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296 | ELSEIF (zht_i_o(zji,zjj,jl).gt.epsi10) THEN |
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297 | zhbnew(zji,zjj,jl) = hi_max(jl) + zdhice(zji,zjj,jl) |
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298 | ELSEIF (zht_i_o(zji,zjj,jl+1).gt.epsi10) THEN |
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299 | zhbnew(zji,zjj,jl) = hi_max(jl) + zdhice(zji,zjj,jl+1) |
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300 | ELSE |
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301 | zhbnew(zji,zjj,jl) = hi_max(jl) |
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302 | ENDIF |
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303 | END DO |
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304 | |
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305 | !- 4.2 Check that each zhbnew lies between adjacent values of ice thickness |
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306 | DO ji = 1, nbrem |
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307 | ! jl, ji |
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308 | zji = nind_i(ji) |
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309 | zjj = nind_j(ji) |
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310 | ! jl, ji |
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311 | IF ( ( a_i(zji,zjj,jl) .GT.epsi10) .AND. & |
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312 | ( ht_i(zji,zjj,jl).GE. zhbnew(zji,zjj,jl) ) & |
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313 | ) THEN |
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314 | zremap_flag(zji,zjj) = 0 |
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315 | ELSEIF ( ( a_i(zji,zjj,jl+1) .GT. epsi10 ) .AND. & |
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316 | ( ht_i(zji,zjj,jl+1).LE. zhbnew(zji,zjj,jl) ) & |
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317 | ) THEN |
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318 | zremap_flag(zji,zjj) = 0 |
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319 | ENDIF |
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320 | |
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321 | !- 4.3 Check that each zhbnew does not exceed maximal values hi_max |
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322 | ! jl, ji |
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323 | IF (zhbnew(zji,zjj,jl).gt.hi_max(jl+1)) THEN |
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324 | zremap_flag(zji,zjj) = 0 |
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325 | ENDIF |
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326 | ! jl, ji |
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327 | IF (zhbnew(zji,zjj,jl).lt.hi_max(jl-1)) THEN |
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328 | zremap_flag(zji,zjj) = 0 |
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329 | ENDIF |
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330 | ! jl, ji |
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331 | END DO !ji |
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332 | ! ji |
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333 | END DO !jl |
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334 | |
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335 | !----------------------------------------------------------------------------------------------- |
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336 | ! 5) Identify cells where ITD is to be remapped |
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337 | !----------------------------------------------------------------------------------------------- |
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338 | nbrem = 0 |
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339 | DO jj = 1, jpj |
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340 | DO ji = 1, jpi |
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341 | IF ( zremap_flag(ji,jj) == 1 ) THEN |
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342 | nbrem = nbrem + 1 |
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343 | nind_i(nbrem) = ji |
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344 | nind_j(nbrem) = jj |
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345 | ENDIF |
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346 | END DO !ji |
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347 | END DO !jj |
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348 | |
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349 | !----------------------------------------------------------------------------------------------- |
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350 | ! 6) Fill arrays with lowermost / uppermost boundaries of 'new' categories |
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351 | !----------------------------------------------------------------------------------------------- |
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352 | DO jj = 1, jpj |
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353 | DO ji = 1, jpi |
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354 | zhb0(ji,jj) = hi_max_typ(0,ntyp) ! 0eme |
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355 | zhb1(ji,jj) = hi_max_typ(1,ntyp) ! 1er |
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356 | |
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357 | zhbnew(ji,jj,klbnd-1) = 0._wp |
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358 | |
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359 | IF( a_i(ji,jj,kubnd) > epsi10 ) THEN |
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360 | zhbnew(ji,jj,kubnd) = 3._wp * ht_i(ji,jj,kubnd) - 2._wp * zhbnew(ji,jj,kubnd-1) |
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361 | ELSE |
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362 | zhbnew(ji,jj,kubnd) = hi_max(kubnd) |
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363 | ENDIF |
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364 | |
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365 | IF( zhbnew(ji,jj,kubnd) < hi_max(kubnd-1) ) zhbnew(ji,jj,kubnd) = hi_max(kubnd-1) |
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366 | |
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367 | END DO !jj |
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368 | END DO !jj |
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369 | |
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370 | !----------------------------------------------------------------------------------------------- |
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371 | ! 7) Compute g(h) |
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372 | !----------------------------------------------------------------------------------------------- |
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373 | !- 7.1 g(h) for category 1 at start of time step |
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374 | CALL lim_itd_fitline( klbnd, zhb0, zhb1, zht_i_o(:,:,klbnd), & |
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375 | & g0(:,:,klbnd), g1(:,:,klbnd), hL(:,:,klbnd), & |
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376 | & hR(:,:,klbnd), zremap_flag ) |
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377 | |
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378 | !- 7.2 Area lost due to melting of thin ice (first category, klbnd) |
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379 | DO ji = 1, nbrem |
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380 | zji = nind_i(ji) |
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381 | zjj = nind_j(ji) |
---|
382 | |
---|
383 | !ji |
---|
384 | IF (a_i(zji,zjj,klbnd) .gt. epsi10) THEN |
---|
385 | zdh0 = zdhice(zji,zjj,klbnd) !decrease of ice thickness in the lower category |
---|
386 | ! ji, a_i > epsi10 |
---|
387 | IF (zdh0 .lt. 0.0) THEN !remove area from category 1 |
---|
388 | ! ji, a_i > epsi10; zdh0 < 0 |
---|
389 | zdh0 = MIN(-zdh0,hi_max(klbnd)) |
---|
390 | |
---|
391 | !Integrate g(1) from 0 to dh0 to estimate area melted |
---|
392 | zetamax = MIN(zdh0,hR(zji,zjj,klbnd)) - hL(zji,zjj,klbnd) |
---|
393 | IF (zetamax.gt.0.0) THEN |
---|
394 | zx1 = zetamax |
---|
395 | zx2 = 0.5 * zetamax*zetamax |
---|
396 | zda0 = g1(zji,zjj,klbnd) * zx2 + g0(zji,zjj,klbnd) * zx1 !ice area removed |
---|
397 | ! Constrain new thickness <= ht_i |
---|
398 | zdamax = a_i(zji,zjj,klbnd) * & |
---|
399 | (1.0 - ht_i(zji,zjj,klbnd)/zht_i_o(zji,zjj,klbnd)) ! zdamax > 0 |
---|
400 | !ice area lost due to melting of thin ice |
---|
401 | zda0 = MIN(zda0, zdamax) |
---|
402 | |
---|
403 | ! Remove area, conserving volume |
---|
404 | ht_i(zji,zjj,klbnd) = ht_i(zji,zjj,klbnd) & |
---|
405 | * a_i(zji,zjj,klbnd) / ( a_i(zji,zjj,klbnd) - zda0 ) |
---|
406 | a_i(zji,zjj,klbnd) = a_i(zji,zjj,klbnd) - zda0 |
---|
407 | v_i(zji,zjj,klbnd) = a_i(zji,zjj,klbnd)*ht_i(zji,zjj,klbnd) |
---|
408 | ENDIF ! zetamax > 0 |
---|
409 | ! ji, a_i > epsi10 |
---|
410 | |
---|
411 | ELSE ! if ice accretion |
---|
412 | ! ji, a_i > epsi10; zdh0 > 0 |
---|
413 | IF ( ntyp .EQ. 1 ) zhbnew(zji,zjj,klbnd-1) = MIN(zdh0,hi_max(klbnd)) |
---|
414 | ! zhbnew was 0, and is shifted to the right to account for thin ice |
---|
415 | ! growth in openwater (F0 = f1) |
---|
416 | IF ( ntyp .NE. 1 ) zhbnew(zji,zjj,0) = 0 |
---|
417 | ! in other types there is |
---|
418 | ! no open water growth (F0 = 0) |
---|
419 | ENDIF ! zdh0 |
---|
420 | |
---|
421 | ! a_i > epsi10 |
---|
422 | ENDIF ! a_i > epsi10 |
---|
423 | |
---|
424 | END DO ! ji |
---|
425 | |
---|
426 | !- 7.3 g(h) for each thickness category |
---|
427 | DO jl = klbnd, kubnd |
---|
428 | CALL lim_itd_fitline(jl, zhbnew(:,:,jl-1), zhbnew(:,:,jl), ht_i(:,:,jl), & |
---|
429 | g0(:,:,jl), g1(:,:,jl), hL(:,:,jl), hR(:,:,jl), & |
---|
430 | zremap_flag) |
---|
431 | END DO |
---|
432 | |
---|
433 | !----------------------------------------------------------------------------------------------- |
---|
434 | ! 8) Compute area and volume to be shifted across each boundary |
---|
435 | !----------------------------------------------------------------------------------------------- |
---|
436 | |
---|
437 | DO jl = klbnd, kubnd - 1 |
---|
438 | DO jj = 1, jpj |
---|
439 | DO ji = 1, jpi |
---|
440 | zdonor(ji,jj,jl) = 0 |
---|
441 | zdaice(ji,jj,jl) = 0.0 |
---|
442 | zdvice(ji,jj,jl) = 0.0 |
---|
443 | END DO |
---|
444 | END DO |
---|
445 | |
---|
446 | DO ji = 1, nbrem |
---|
447 | zji = nind_i(ji) |
---|
448 | zjj = nind_j(ji) |
---|
449 | |
---|
450 | IF (zhbnew(zji,zjj,jl) .gt. hi_max(jl)) THEN ! transfer from jl to jl+1 |
---|
451 | |
---|
452 | ! left and right integration limits in eta space |
---|
453 | zvetamin(ji) = MAX(hi_max(jl), hL(zji,zjj,jl)) - hL(zji,zjj,jl) |
---|
454 | zvetamax(ji) = MIN(zhbnew(zji,zjj,jl), hR(zji,zjj,jl)) - hL(zji,zjj,jl) |
---|
455 | zdonor(zji,zjj,jl) = jl |
---|
456 | |
---|
457 | ELSE ! zhbnew(jl) <= hi_max(jl) ; transfer from jl+1 to jl |
---|
458 | |
---|
459 | ! left and right integration limits in eta space |
---|
460 | zvetamin(ji) = 0.0 |
---|
461 | zvetamax(ji) = MIN(hi_max(jl), hR(zji,zjj,jl+1)) - hL(zji,zjj,jl+1) |
---|
462 | zdonor(zji,zjj,jl) = jl + 1 |
---|
463 | |
---|
464 | ENDIF ! zhbnew(jl) > hi_max(jl) |
---|
465 | |
---|
466 | zetamax = MAX(zvetamax(ji), zvetamin(ji)) ! no transfer if etamax < etamin |
---|
467 | zetamin = zvetamin(ji) |
---|
468 | |
---|
469 | zx1 = zetamax - zetamin |
---|
470 | zwk1 = zetamin*zetamin |
---|
471 | zwk2 = zetamax*zetamax |
---|
472 | zx2 = 0.5 * (zwk2 - zwk1) |
---|
473 | zwk1 = zwk1 * zetamin |
---|
474 | zwk2 = zwk2 * zetamax |
---|
475 | zx3 = 1.0/3.0 * (zwk2 - zwk1) |
---|
476 | nd = zdonor(zji,zjj,jl) |
---|
477 | zdaice(zji,zjj,jl) = g1(zji,zjj,nd)*zx2 + g0(zji,zjj,nd)*zx1 |
---|
478 | zdvice(zji,zjj,jl) = g1(zji,zjj,nd)*zx3 + g0(zji,zjj,nd)*zx2 + & |
---|
479 | zdaice(zji,zjj,jl)*hL(zji,zjj,nd) |
---|
480 | |
---|
481 | END DO ! ji |
---|
482 | END DO ! jl klbnd -> kubnd - 1 |
---|
483 | |
---|
484 | !!---------------------------------------------------------------------------------------------- |
---|
485 | !! 9) Shift ice between categories |
---|
486 | !!---------------------------------------------------------------------------------------------- |
---|
487 | CALL lim_itd_shiftice ( klbnd, kubnd, zdonor, zdaice, zdvice ) |
---|
488 | |
---|
489 | !!---------------------------------------------------------------------------------------------- |
---|
490 | !! 10) Make sure ht_i >= minimum ice thickness hi_min |
---|
491 | !!---------------------------------------------------------------------------------------------- |
---|
492 | |
---|
493 | DO ji = 1, nbrem |
---|
494 | zji = nind_i(ji) |
---|
495 | zjj = nind_j(ji) |
---|
496 | IF ( ( zhimin .GT. 0.0 ) .AND. & |
---|
497 | ( ( a_i(zji,zjj,1) .GT. epsi10 ) .AND. ( ht_i(zji,zjj,1) .LT. zhimin ) ) & |
---|
498 | ) THEN |
---|
499 | a_i(zji,zjj,1) = a_i(zji,zjj,1) * ht_i(zji,zjj,1) / zhimin |
---|
500 | ht_i(zji,zjj,1) = zhimin |
---|
501 | v_i(zji,zjj,1) = a_i(zji,zjj,1)*ht_i(zji,zjj,1) |
---|
502 | ENDIF |
---|
503 | END DO !ji |
---|
504 | |
---|
505 | !!---------------------------------------------------------------------------------------------- |
---|
506 | !! 11) Conservation check |
---|
507 | !!---------------------------------------------------------------------------------------------- |
---|
508 | IF ( con_i ) THEN |
---|
509 | CALL lim_column_sum (jpl, v_i, vt_i_final) |
---|
510 | fieldid = ' v_i : limitd_th ' |
---|
511 | CALL lim_cons_check (vt_i_init, vt_i_final, 1.0e-6, fieldid) |
---|
512 | |
---|
513 | CALL lim_column_sum_energy (jpl, nlay_i, e_i, et_i_final) |
---|
514 | fieldid = ' e_i : limitd_th ' |
---|
515 | CALL lim_cons_check (et_i_init, et_i_final, 1.0e-3, fieldid) |
---|
516 | |
---|
517 | CALL lim_column_sum (jpl, v_s, vt_s_final) |
---|
518 | fieldid = ' v_s : limitd_th ' |
---|
519 | CALL lim_cons_check (vt_s_init, vt_s_final, 1.0e-6, fieldid) |
---|
520 | |
---|
521 | dummy_es(:,:,:) = e_s(:,:,1,:) |
---|
522 | CALL lim_column_sum (jpl, dummy_es(:,:,:) , et_s_final) |
---|
523 | fieldid = ' e_s : limitd_th ' |
---|
524 | CALL lim_cons_check (et_s_init, et_s_final, 1.0e-3, fieldid) |
---|
525 | ENDIF |
---|
526 | |
---|
527 | CALL wrk_dealloc( jpi,jpj, zremap_flag ) ! integer |
---|
528 | CALL wrk_dealloc( jpi,jpj,jpl-1, zdonor ) ! integer |
---|
529 | CALL wrk_dealloc( jpi,jpj,jpl, zdhice, g0, g1, hL, hR, zht_i_o, dummy_es ) |
---|
530 | CALL wrk_dealloc( jpi,jpj,jpl-1, zdaice, zdvice ) |
---|
531 | CALL wrk_dealloc( jpi,jpj,jpl+1, zhbnew, kkstart = 0 ) |
---|
532 | CALL wrk_dealloc( (jpi+1)*(jpj+1), zvetamin, zvetamax ) |
---|
533 | CALL wrk_dealloc( (jpi+1)*(jpj+1), nind_i, nind_j ) ! integer |
---|
534 | CALL wrk_dealloc( jpi,jpj, zhb0,zhb1,vt_i_init,vt_i_final,vt_s_init,vt_s_final,et_i_init,et_i_final,et_s_init,et_s_final ) |
---|
535 | |
---|
536 | END SUBROUTINE lim_itd_th_rem |
---|
537 | |
---|
538 | |
---|
539 | SUBROUTINE lim_itd_fitline( num_cat, HbL, Hbr, hice, & |
---|
540 | & g0, g1, hL, hR, zremap_flag ) |
---|
541 | !!------------------------------------------------------------------ |
---|
542 | !! *** ROUTINE lim_itd_fitline *** |
---|
543 | !! |
---|
544 | !! ** Purpose : fit g(h) with a line using area, volume constraints |
---|
545 | !! |
---|
546 | !! ** Method : Fit g(h) with a line, satisfying area and volume constraints. |
---|
547 | !! To reduce roundoff errors caused by large values of g0 and g1, |
---|
548 | !! we actually compute g(eta), where eta = h - hL, and hL is the |
---|
549 | !! left boundary. |
---|
550 | !!------------------------------------------------------------------ |
---|
551 | INTEGER , INTENT(in ) :: num_cat ! category index |
---|
552 | REAL(wp), DIMENSION(jpi,jpj), INTENT(in ) :: HbL, HbR ! left and right category boundaries |
---|
553 | REAL(wp), DIMENSION(jpi,jpj), INTENT(in ) :: hice ! ice thickness |
---|
554 | REAL(wp), DIMENSION(jpi,jpj), INTENT( out) :: g0, g1 ! coefficients in linear equation for g(eta) |
---|
555 | REAL(wp), DIMENSION(jpi,jpj), INTENT( out) :: hL ! min value of range over which g(h) > 0 |
---|
556 | REAL(wp), DIMENSION(jpi,jpj), INTENT( out) :: hR ! max value of range over which g(h) > 0 |
---|
557 | INTEGER , DIMENSION(jpi,jpj), INTENT(in ) :: zremap_flag ! |
---|
558 | ! |
---|
559 | INTEGER :: ji,jj ! horizontal indices |
---|
560 | REAL(wp) :: zh13 ! HbL + 1/3 * (HbR - HbL) |
---|
561 | REAL(wp) :: zh23 ! HbL + 2/3 * (HbR - HbL) |
---|
562 | REAL(wp) :: zdhr ! 1 / (hR - hL) |
---|
563 | REAL(wp) :: zwk1, zwk2 ! temporary variables |
---|
564 | REAL(wp) :: zacrith ! critical minimum concentration in an ice category |
---|
565 | !!------------------------------------------------------------------ |
---|
566 | ! |
---|
567 | zacrith = 1.0e-6 |
---|
568 | ! |
---|
569 | DO jj = 1, jpj |
---|
570 | DO ji = 1, jpi |
---|
571 | ! |
---|
572 | IF( zremap_flag(ji,jj) == 1 .AND. a_i(ji,jj,num_cat) > zacrith & |
---|
573 | & .AND. hice(ji,jj) > 0._wp ) THEN |
---|
574 | |
---|
575 | ! Initialize hL and hR |
---|
576 | |
---|
577 | hL(ji,jj) = HbL(ji,jj) |
---|
578 | hR(ji,jj) = HbR(ji,jj) |
---|
579 | |
---|
580 | ! Change hL or hR if hice falls outside central third of range |
---|
581 | |
---|
582 | zh13 = 1.0/3.0 * (2.0*hL(ji,jj) + hR(ji,jj)) |
---|
583 | zh23 = 1.0/3.0 * (hL(ji,jj) + 2.0*hR(ji,jj)) |
---|
584 | |
---|
585 | IF ( hice(ji,jj) < zh13 ) THEN ; hR(ji,jj) = 3._wp * hice(ji,jj) - 2._wp * hL(ji,jj) |
---|
586 | ELSEIF( hice(ji,jj) > zh23 ) THEN ; hL(ji,jj) = 3._wp * hice(ji,jj) - 2._wp * hR(ji,jj) |
---|
587 | ENDIF |
---|
588 | |
---|
589 | ! Compute coefficients of g(eta) = g0 + g1*eta |
---|
590 | |
---|
591 | zdhr = 1._wp / (hR(ji,jj) - hL(ji,jj)) |
---|
592 | zwk1 = 6._wp * a_i(ji,jj,num_cat) * zdhr |
---|
593 | zwk2 = ( hice(ji,jj) - hL(ji,jj) ) * zdhr |
---|
594 | g0(ji,jj) = zwk1 * ( 2._wp/3._wp - zwk2 ) |
---|
595 | g1(ji,jj) = 2._wp * zdhr * zwk1 * (zwk2 - 0.5) |
---|
596 | ! |
---|
597 | ELSE ! remap_flag = .false. or a_i < epsi10 |
---|
598 | hL(ji,jj) = 0._wp |
---|
599 | hR(ji,jj) = 0._wp |
---|
600 | g0(ji,jj) = 0._wp |
---|
601 | g1(ji,jj) = 0._wp |
---|
602 | ENDIF ! a_i > epsi10 |
---|
603 | ! |
---|
604 | END DO |
---|
605 | END DO |
---|
606 | ! |
---|
607 | END SUBROUTINE lim_itd_fitline |
---|
608 | |
---|
609 | |
---|
610 | SUBROUTINE lim_itd_shiftice( klbnd, kubnd, zdonor, zdaice, zdvice ) |
---|
611 | !!------------------------------------------------------------------ |
---|
612 | !! *** ROUTINE lim_itd_shiftice *** |
---|
613 | !! |
---|
614 | !! ** Purpose : shift ice across category boundaries, conserving everything |
---|
615 | !! ( area, volume, energy, age*vol, and mass of salt ) |
---|
616 | !! |
---|
617 | !! ** Method : |
---|
618 | !!------------------------------------------------------------------ |
---|
619 | INTEGER , INTENT(in ) :: klbnd ! Start thickness category index point |
---|
620 | INTEGER , INTENT(in ) :: kubnd ! End point on which the the computation is applied |
---|
621 | INTEGER , DIMENSION(jpi,jpj,jpl-1), INTENT(in ) :: zdonor ! donor category index |
---|
622 | REAL(wp), DIMENSION(jpi,jpj,jpl-1), INTENT(inout) :: zdaice ! ice area transferred across boundary |
---|
623 | REAL(wp), DIMENSION(jpi,jpj,jpl-1), INTENT(inout) :: zdvice ! ice volume transferred across boundary |
---|
624 | |
---|
625 | INTEGER :: ji, jj, jl, jl2, jl1, jk ! dummy loop indices |
---|
626 | INTEGER :: zji, zjj ! indices when changing from 2D-1D is done |
---|
627 | |
---|
628 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zaTsfn |
---|
629 | REAL(wp), POINTER, DIMENSION(:,:) :: zworka ! temporary array used here |
---|
630 | |
---|
631 | REAL(wp) :: zdvsnow, zdesnow ! snow volume and energy transferred |
---|
632 | REAL(wp) :: zdeice ! ice energy transferred |
---|
633 | REAL(wp) :: zdsm_vice ! ice salinity times volume transferred |
---|
634 | REAL(wp) :: zdo_aice ! ice age times volume transferred |
---|
635 | REAL(wp) :: zdaTsf ! aicen*Tsfcn transferred |
---|
636 | REAL(wp) :: zindsn ! snow or not |
---|
637 | REAL(wp) :: zindb ! ice or not |
---|
638 | |
---|
639 | INTEGER, POINTER, DIMENSION(:) :: nind_i, nind_j ! compressed indices for i/j directions |
---|
640 | |
---|
641 | INTEGER :: nbrem ! number of cells with ice to transfer |
---|
642 | |
---|
643 | LOGICAL :: zdaice_negative ! true if daice < -puny |
---|
644 | LOGICAL :: zdvice_negative ! true if dvice < -puny |
---|
645 | LOGICAL :: zdaice_greater_aicen ! true if daice > aicen |
---|
646 | LOGICAL :: zdvice_greater_vicen ! true if dvice > vicen |
---|
647 | !!------------------------------------------------------------------ |
---|
648 | |
---|
649 | CALL wrk_alloc( jpi,jpj,jpl, zaTsfn ) |
---|
650 | CALL wrk_alloc( jpi,jpj, zworka ) |
---|
651 | CALL wrk_alloc( (jpi+1)*(jpj+1), nind_i, nind_j ) ! integer |
---|
652 | |
---|
653 | !---------------------------------------------------------------------------------------------- |
---|
654 | ! 1) Define a variable equal to a_i*T_su |
---|
655 | !---------------------------------------------------------------------------------------------- |
---|
656 | |
---|
657 | DO jl = klbnd, kubnd |
---|
658 | zaTsfn(:,:,jl) = a_i(:,:,jl)*t_su(:,:,jl) |
---|
659 | END DO |
---|
660 | |
---|
661 | !---------------------------------------------------------------------------------------------- |
---|
662 | ! 2) Check for daice or dvice out of range, allowing for roundoff error |
---|
663 | !---------------------------------------------------------------------------------------------- |
---|
664 | ! Note: zdaice < 0 or zdvice < 0 usually happens when category jl |
---|
665 | ! has a small area, with h(n) very close to a boundary. Then |
---|
666 | ! the coefficients of g(h) are large, and the computed daice and |
---|
667 | ! dvice can be in error. If this happens, it is best to transfer |
---|
668 | ! either the entire category or nothing at all, depending on which |
---|
669 | ! side of the boundary hice(n) lies. |
---|
670 | !----------------------------------------------------------------- |
---|
671 | DO jl = klbnd, kubnd-1 |
---|
672 | |
---|
673 | zdaice_negative = .false. |
---|
674 | zdvice_negative = .false. |
---|
675 | zdaice_greater_aicen = .false. |
---|
676 | zdvice_greater_vicen = .false. |
---|
677 | |
---|
678 | DO jj = 1, jpj |
---|
679 | DO ji = 1, jpi |
---|
680 | |
---|
681 | IF (zdonor(ji,jj,jl) .GT. 0) THEN |
---|
682 | jl1 = zdonor(ji,jj,jl) |
---|
683 | |
---|
684 | IF (zdaice(ji,jj,jl) .LT. 0.0) THEN |
---|
685 | IF (zdaice(ji,jj,jl) .GT. -epsi10) THEN |
---|
686 | IF ( ( jl1.EQ.jl .AND. ht_i(ji,jj,jl1) .GT. hi_max(jl) ) & |
---|
687 | .OR. & |
---|
688 | ( jl1.EQ.jl+1 .AND. ht_i(ji,jj,jl1) .LE. hi_max(jl) ) & |
---|
689 | ) THEN |
---|
690 | zdaice(ji,jj,jl) = a_i(ji,jj,jl1) ! shift entire category |
---|
691 | zdvice(ji,jj,jl) = v_i(ji,jj,jl1) |
---|
692 | ELSE |
---|
693 | zdaice(ji,jj,jl) = 0.0 ! shift no ice |
---|
694 | zdvice(ji,jj,jl) = 0.0 |
---|
695 | ENDIF |
---|
696 | ELSE |
---|
697 | zdaice_negative = .true. |
---|
698 | ENDIF |
---|
699 | ENDIF |
---|
700 | |
---|
701 | IF (zdvice(ji,jj,jl) .LT. 0.0) THEN |
---|
702 | IF (zdvice(ji,jj,jl) .GT. -epsi10 ) THEN |
---|
703 | IF ( ( jl1.EQ.jl .AND. ht_i(ji,jj,jl1).GT.hi_max(jl) ) & |
---|
704 | .OR. & |
---|
705 | ( jl1.EQ.jl+1 .AND. ht_i(ji,jj,jl1) .LE. hi_max(jl) ) & |
---|
706 | ) THEN |
---|
707 | zdaice(ji,jj,jl) = a_i(ji,jj,jl1) ! shift entire category |
---|
708 | zdvice(ji,jj,jl) = v_i(ji,jj,jl1) |
---|
709 | ELSE |
---|
710 | zdaice(ji,jj,jl) = 0.0 ! shift no ice |
---|
711 | zdvice(ji,jj,jl) = 0.0 |
---|
712 | ENDIF |
---|
713 | ELSE |
---|
714 | zdvice_negative = .true. |
---|
715 | ENDIF |
---|
716 | ENDIF |
---|
717 | |
---|
718 | ! If daice is close to aicen, set daice = aicen. |
---|
719 | IF (zdaice(ji,jj,jl) .GT. a_i(ji,jj,jl1) - epsi10 ) THEN |
---|
720 | IF (zdaice(ji,jj,jl) .LT. a_i(ji,jj,jl1)+epsi10) THEN |
---|
721 | zdaice(ji,jj,jl) = a_i(ji,jj,jl1) |
---|
722 | zdvice(ji,jj,jl) = v_i(ji,jj,jl1) |
---|
723 | ELSE |
---|
724 | zdaice_greater_aicen = .true. |
---|
725 | ENDIF |
---|
726 | ENDIF |
---|
727 | |
---|
728 | IF (zdvice(ji,jj,jl) .GT. v_i(ji,jj,jl1)-epsi10) THEN |
---|
729 | IF (zdvice(ji,jj,jl) .LT. v_i(ji,jj,jl1)+epsi10) THEN |
---|
730 | zdaice(ji,jj,jl) = a_i(ji,jj,jl1) |
---|
731 | zdvice(ji,jj,jl) = v_i(ji,jj,jl1) |
---|
732 | ELSE |
---|
733 | zdvice_greater_vicen = .true. |
---|
734 | ENDIF |
---|
735 | ENDIF |
---|
736 | |
---|
737 | ENDIF ! donor > 0 |
---|
738 | END DO ! i |
---|
739 | END DO ! j |
---|
740 | |
---|
741 | END DO !jl |
---|
742 | |
---|
743 | !------------------------------------------------------------------------------- |
---|
744 | ! 3) Transfer volume and energy between categories |
---|
745 | !------------------------------------------------------------------------------- |
---|
746 | |
---|
747 | DO jl = klbnd, kubnd - 1 |
---|
748 | nbrem = 0 |
---|
749 | DO jj = 1, jpj |
---|
750 | DO ji = 1, jpi |
---|
751 | IF (zdaice(ji,jj,jl) .GT. 0.0 ) THEN ! daice(n) can be < puny |
---|
752 | nbrem = nbrem + 1 |
---|
753 | nind_i(nbrem) = ji |
---|
754 | nind_j(nbrem) = jj |
---|
755 | ENDIF ! tmask |
---|
756 | END DO |
---|
757 | END DO |
---|
758 | |
---|
759 | DO ji = 1, nbrem |
---|
760 | zji = nind_i(ji) |
---|
761 | zjj = nind_j(ji) |
---|
762 | |
---|
763 | jl1 = zdonor(zji,zjj,jl) |
---|
764 | zindb = MAX( 0.0 , SIGN( 1.0 , v_i(zji,zjj,jl1) - epsi10 ) ) |
---|
765 | zworka(zji,zjj) = zdvice(zji,zjj,jl) / MAX(v_i(zji,zjj,jl1),epsi10) * zindb |
---|
766 | IF( jl1 == jl) THEN ; jl2 = jl1+1 |
---|
767 | ELSE ; jl2 = jl |
---|
768 | ENDIF |
---|
769 | |
---|
770 | !-------------- |
---|
771 | ! Ice areas |
---|
772 | !-------------- |
---|
773 | |
---|
774 | a_i(zji,zjj,jl1) = a_i(zji,zjj,jl1) - zdaice(zji,zjj,jl) |
---|
775 | a_i(zji,zjj,jl2) = a_i(zji,zjj,jl2) + zdaice(zji,zjj,jl) |
---|
776 | |
---|
777 | !-------------- |
---|
778 | ! Ice volumes |
---|
779 | !-------------- |
---|
780 | |
---|
781 | v_i(zji,zjj,jl1) = v_i(zji,zjj,jl1) - zdvice(zji,zjj,jl) |
---|
782 | v_i(zji,zjj,jl2) = v_i(zji,zjj,jl2) + zdvice(zji,zjj,jl) |
---|
783 | |
---|
784 | !-------------- |
---|
785 | ! Snow volumes |
---|
786 | !-------------- |
---|
787 | |
---|
788 | zdvsnow = v_s(zji,zjj,jl1) * zworka(zji,zjj) |
---|
789 | v_s(zji,zjj,jl1) = v_s(zji,zjj,jl1) - zdvsnow |
---|
790 | v_s(zji,zjj,jl2) = v_s(zji,zjj,jl2) + zdvsnow |
---|
791 | |
---|
792 | !-------------------- |
---|
793 | ! Snow heat content |
---|
794 | !-------------------- |
---|
795 | |
---|
796 | zdesnow = e_s(zji,zjj,1,jl1) * zworka(zji,zjj) |
---|
797 | e_s(zji,zjj,1,jl1) = e_s(zji,zjj,1,jl1) - zdesnow |
---|
798 | e_s(zji,zjj,1,jl2) = e_s(zji,zjj,1,jl2) + zdesnow |
---|
799 | |
---|
800 | !-------------- |
---|
801 | ! Ice age |
---|
802 | !-------------- |
---|
803 | |
---|
804 | zdo_aice = oa_i(zji,zjj,jl1) * zdaice(zji,zjj,jl) |
---|
805 | oa_i(zji,zjj,jl1) = oa_i(zji,zjj,jl1) - zdo_aice |
---|
806 | oa_i(zji,zjj,jl2) = oa_i(zji,zjj,jl2) + zdo_aice |
---|
807 | |
---|
808 | !-------------- |
---|
809 | ! Ice salinity |
---|
810 | !-------------- |
---|
811 | |
---|
812 | zdsm_vice = smv_i(zji,zjj,jl1) * zworka(zji,zjj) |
---|
813 | smv_i(zji,zjj,jl1) = smv_i(zji,zjj,jl1) - zdsm_vice |
---|
814 | smv_i(zji,zjj,jl2) = smv_i(zji,zjj,jl2) + zdsm_vice |
---|
815 | |
---|
816 | !--------------------- |
---|
817 | ! Surface temperature |
---|
818 | !--------------------- |
---|
819 | |
---|
820 | zdaTsf = t_su(zji,zjj,jl1) * zdaice(zji,zjj,jl) |
---|
821 | zaTsfn(zji,zjj,jl1) = zaTsfn(zji,zjj,jl1) - zdaTsf |
---|
822 | zaTsfn(zji,zjj,jl2) = zaTsfn(zji,zjj,jl2) + zdaTsf |
---|
823 | |
---|
824 | END DO ! ji |
---|
825 | |
---|
826 | !------------------ |
---|
827 | ! Ice heat content |
---|
828 | !------------------ |
---|
829 | |
---|
830 | DO jk = 1, nlay_i |
---|
831 | !CDIR NODEP |
---|
832 | DO ji = 1, nbrem |
---|
833 | zji = nind_i(ji) |
---|
834 | zjj = nind_j(ji) |
---|
835 | |
---|
836 | jl1 = zdonor(zji,zjj,jl) |
---|
837 | IF (jl1 .EQ. jl) THEN |
---|
838 | jl2 = jl+1 |
---|
839 | ELSE ! n1 = n+1 |
---|
840 | jl2 = jl |
---|
841 | ENDIF |
---|
842 | |
---|
843 | zdeice = e_i(zji,zjj,jk,jl1) * zworka(zji,zjj) |
---|
844 | e_i(zji,zjj,jk,jl1) = e_i(zji,zjj,jk,jl1) - zdeice |
---|
845 | e_i(zji,zjj,jk,jl2) = e_i(zji,zjj,jk,jl2) + zdeice |
---|
846 | END DO ! ji |
---|
847 | END DO ! jk |
---|
848 | |
---|
849 | END DO ! boundaries, 1 to ncat-1 |
---|
850 | |
---|
851 | !----------------------------------------------------------------- |
---|
852 | ! Update ice thickness and temperature |
---|
853 | !----------------------------------------------------------------- |
---|
854 | |
---|
855 | DO jl = klbnd, kubnd |
---|
856 | DO jj = 1, jpj |
---|
857 | DO ji = 1, jpi |
---|
858 | IF ( a_i(ji,jj,jl) > epsi10 ) THEN |
---|
859 | ht_i(ji,jj,jl) = v_i (ji,jj,jl) / a_i(ji,jj,jl) |
---|
860 | t_su(ji,jj,jl) = zaTsfn(ji,jj,jl) / a_i(ji,jj,jl) |
---|
861 | zindsn = 1.0 - MAX(0.0,SIGN(1.0,-v_s(ji,jj,jl))) !0 if no ice and 1 if yes |
---|
862 | ELSE |
---|
863 | ht_i(ji,jj,jl) = 0._wp |
---|
864 | t_su(ji,jj,jl) = rtt |
---|
865 | ENDIF |
---|
866 | END DO ! ji |
---|
867 | END DO ! jj |
---|
868 | END DO ! jl |
---|
869 | ! |
---|
870 | CALL wrk_dealloc( jpi,jpj,jpl, zaTsfn ) |
---|
871 | CALL wrk_dealloc( jpi,jpj, zworka ) |
---|
872 | CALL wrk_dealloc( (jpi+1)*(jpj+1), nind_i, nind_j ) ! integer |
---|
873 | ! |
---|
874 | END SUBROUTINE lim_itd_shiftice |
---|
875 | |
---|
876 | |
---|
877 | SUBROUTINE lim_itd_th_reb( klbnd, kubnd, ntyp ) |
---|
878 | !!------------------------------------------------------------------ |
---|
879 | !! *** ROUTINE lim_itd_th_reb *** |
---|
880 | !! |
---|
881 | !! ** Purpose : rebin - rebins thicknesses into defined categories |
---|
882 | !! |
---|
883 | !! ** Method : |
---|
884 | !!------------------------------------------------------------------ |
---|
885 | INTEGER , INTENT (in) :: klbnd ! Start thickness category index point |
---|
886 | INTEGER , INTENT (in) :: kubnd ! End point on which the the computation is applied |
---|
887 | INTEGER , INTENT (in) :: ntyp ! number of the ice type involved in the rebinning process |
---|
888 | ! |
---|
889 | INTEGER :: ji,jj, jl ! dummy loop indices |
---|
890 | INTEGER :: zshiftflag ! = .true. if ice must be shifted |
---|
891 | CHARACTER (len = 15) :: fieldid |
---|
892 | |
---|
893 | INTEGER , POINTER, DIMENSION(:,:,:) :: zdonor ! donor category index |
---|
894 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zdaice, zdvice ! ice area and volume transferred |
---|
895 | |
---|
896 | REAL(wp), POINTER, DIMENSION(:,:) :: vt_i_init, vt_i_final ! ice volume summed over categories |
---|
897 | REAL(wp), POINTER, DIMENSION(:,:) :: vt_s_init, vt_s_final ! snow volume summed over categories |
---|
898 | !!------------------------------------------------------------------ |
---|
899 | |
---|
900 | CALL wrk_alloc( jpi,jpj,jpl, zdonor ) ! interger |
---|
901 | CALL wrk_alloc( jpi,jpj,jpl, zdaice, zdvice ) |
---|
902 | CALL wrk_alloc( jpi,jpj, vt_i_init, vt_i_final, vt_s_init, vt_s_final ) |
---|
903 | ! |
---|
904 | IF( con_i ) THEN ! conservation check |
---|
905 | CALL lim_column_sum (jpl, v_i, vt_i_init) |
---|
906 | CALL lim_column_sum (jpl, v_s, vt_s_init) |
---|
907 | ENDIF |
---|
908 | |
---|
909 | ! |
---|
910 | !------------------------------------------------------------------------------ |
---|
911 | ! 1) Compute ice thickness. |
---|
912 | !------------------------------------------------------------------------------ |
---|
913 | DO jl = klbnd, kubnd |
---|
914 | DO jj = 1, jpj |
---|
915 | DO ji = 1, jpi |
---|
916 | IF( a_i(ji,jj,jl) > epsi10 ) THEN |
---|
917 | ht_i(ji,jj,jl) = v_i(ji,jj,jl) / a_i(ji,jj,jl) |
---|
918 | ELSE |
---|
919 | ht_i(ji,jj,jl) = 0._wp |
---|
920 | ENDIF |
---|
921 | END DO |
---|
922 | END DO |
---|
923 | END DO |
---|
924 | |
---|
925 | !------------------------------------------------------------------------------ |
---|
926 | ! 2) Make sure thickness of cat klbnd is at least hi_max_typ(klbnd) |
---|
927 | !------------------------------------------------------------------------------ |
---|
928 | DO jj = 1, jpj |
---|
929 | DO ji = 1, jpi |
---|
930 | IF( a_i(ji,jj,klbnd) > epsi10 ) THEN |
---|
931 | IF( ht_i(ji,jj,klbnd) <= hi_max_typ(0,ntyp) .AND. hi_max_typ(0,ntyp) > 0._wp ) THEN |
---|
932 | a_i(ji,jj,klbnd) = v_i(ji,jj,klbnd) / hi_max_typ(0,ntyp) |
---|
933 | ht_i(ji,jj,klbnd) = hi_max_typ(0,ntyp) |
---|
934 | ENDIF |
---|
935 | ENDIF |
---|
936 | END DO |
---|
937 | END DO |
---|
938 | |
---|
939 | !------------------------------------------------------------------------------ |
---|
940 | ! 3) If a category thickness is not in bounds, shift the |
---|
941 | ! entire area, volume, and energy to the neighboring category |
---|
942 | !------------------------------------------------------------------------------ |
---|
943 | !------------------------- |
---|
944 | ! Initialize shift arrays |
---|
945 | !------------------------- |
---|
946 | DO jl = klbnd, kubnd |
---|
947 | zdonor(:,:,jl) = 0 |
---|
948 | zdaice(:,:,jl) = 0._wp |
---|
949 | zdvice(:,:,jl) = 0._wp |
---|
950 | END DO |
---|
951 | |
---|
952 | !------------------------- |
---|
953 | ! Move thin categories up |
---|
954 | !------------------------- |
---|
955 | |
---|
956 | DO jl = klbnd, kubnd - 1 ! loop over category boundaries |
---|
957 | |
---|
958 | !--------------------------------------- |
---|
959 | ! identify thicknesses that are too big |
---|
960 | !--------------------------------------- |
---|
961 | zshiftflag = 0 |
---|
962 | |
---|
963 | DO jj = 1, jpj |
---|
964 | DO ji = 1, jpi |
---|
965 | IF( a_i(ji,jj,jl) > epsi10 .AND. ht_i(ji,jj,jl) > hi_max(jl) ) THEN |
---|
966 | zshiftflag = 1 |
---|
967 | zdonor(ji,jj,jl) = jl |
---|
968 | zdaice(ji,jj,jl) = a_i(ji,jj,jl) |
---|
969 | zdvice(ji,jj,jl) = v_i(ji,jj,jl) |
---|
970 | ENDIF |
---|
971 | END DO ! ji |
---|
972 | END DO ! jj |
---|
973 | IF(lk_mpp) CALL mpp_max( zshiftflag ) |
---|
974 | |
---|
975 | IF( zshiftflag == 1 ) THEN ! Shift ice between categories |
---|
976 | CALL lim_itd_shiftice( klbnd, kubnd, zdonor, zdaice, zdvice ) |
---|
977 | ! Reset shift parameters |
---|
978 | zdonor(:,:,jl) = 0 |
---|
979 | zdaice(:,:,jl) = 0._wp |
---|
980 | zdvice(:,:,jl) = 0._wp |
---|
981 | ENDIF |
---|
982 | ! |
---|
983 | END DO ! jl |
---|
984 | |
---|
985 | !---------------------------- |
---|
986 | ! Move thick categories down |
---|
987 | !---------------------------- |
---|
988 | |
---|
989 | DO jl = kubnd - 1, 1, -1 ! loop over category boundaries |
---|
990 | |
---|
991 | !----------------------------------------- |
---|
992 | ! Identify thicknesses that are too small |
---|
993 | !----------------------------------------- |
---|
994 | zshiftflag = 0 |
---|
995 | |
---|
996 | DO jj = 1, jpj |
---|
997 | DO ji = 1, jpi |
---|
998 | IF( a_i(ji,jj,jl+1) > epsi10 .AND. & |
---|
999 | ht_i(ji,jj,jl+1) <= hi_max(jl) ) THEN |
---|
1000 | ! |
---|
1001 | zshiftflag = 1 |
---|
1002 | zdonor(ji,jj,jl) = jl + 1 |
---|
1003 | zdaice(ji,jj,jl) = a_i(ji,jj,jl+1) |
---|
1004 | zdvice(ji,jj,jl) = v_i(ji,jj,jl+1) |
---|
1005 | ENDIF |
---|
1006 | END DO ! ji |
---|
1007 | END DO ! jj |
---|
1008 | |
---|
1009 | IF(lk_mpp) CALL mpp_max( zshiftflag ) |
---|
1010 | |
---|
1011 | IF( zshiftflag == 1 ) THEN ! Shift ice between categories |
---|
1012 | CALL lim_itd_shiftice( klbnd, kubnd, zdonor, zdaice, zdvice ) |
---|
1013 | ! Reset shift parameters |
---|
1014 | zdonor(:,:,jl) = 0 |
---|
1015 | zdaice(:,:,jl) = 0._wp |
---|
1016 | zdvice(:,:,jl) = 0._wp |
---|
1017 | ENDIF |
---|
1018 | |
---|
1019 | END DO ! jl |
---|
1020 | |
---|
1021 | !------------------------------------------------------------------------------ |
---|
1022 | ! 4) Conservation check |
---|
1023 | !------------------------------------------------------------------------------ |
---|
1024 | |
---|
1025 | IF( con_i ) THEN |
---|
1026 | CALL lim_column_sum (jpl, v_i, vt_i_final) |
---|
1027 | fieldid = ' v_i : limitd_reb ' |
---|
1028 | CALL lim_cons_check (vt_i_init, vt_i_final, 1.0e-6, fieldid) |
---|
1029 | |
---|
1030 | CALL lim_column_sum (jpl, v_s, vt_s_final) |
---|
1031 | fieldid = ' v_s : limitd_reb ' |
---|
1032 | CALL lim_cons_check (vt_s_init, vt_s_final, 1.0e-6, fieldid) |
---|
1033 | ENDIF |
---|
1034 | ! |
---|
1035 | CALL wrk_dealloc( jpi,jpj,jpl, zdonor ) ! interger |
---|
1036 | CALL wrk_dealloc( jpi,jpj,jpl, zdaice, zdvice ) |
---|
1037 | CALL wrk_dealloc( jpi,jpj, vt_i_init, vt_i_final, vt_s_init, vt_s_final ) |
---|
1038 | |
---|
1039 | END SUBROUTINE lim_itd_th_reb |
---|
1040 | |
---|
1041 | #else |
---|
1042 | !!---------------------------------------------------------------------- |
---|
1043 | !! Default option Dummy module NO LIM sea-ice model |
---|
1044 | !!---------------------------------------------------------------------- |
---|
1045 | CONTAINS |
---|
1046 | SUBROUTINE lim_itd_th ! Empty routines |
---|
1047 | END SUBROUTINE lim_itd_th |
---|
1048 | SUBROUTINE lim_itd_th_ini |
---|
1049 | END SUBROUTINE lim_itd_th_ini |
---|
1050 | SUBROUTINE lim_itd_th_rem |
---|
1051 | END SUBROUTINE lim_itd_th_rem |
---|
1052 | SUBROUTINE lim_itd_fitline |
---|
1053 | END SUBROUTINE lim_itd_fitline |
---|
1054 | SUBROUTINE lim_itd_shiftice |
---|
1055 | END SUBROUTINE lim_itd_shiftice |
---|
1056 | SUBROUTINE lim_itd_th_reb |
---|
1057 | END SUBROUTINE lim_itd_th_reb |
---|
1058 | #endif |
---|
1059 | !!====================================================================== |
---|
1060 | END MODULE limitd_th |
---|