1 | MODULE limitd_th |
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2 | !!====================================================================== |
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3 | !! *** MODULE limitd_th *** |
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4 | !! LIM3 ice model : ice thickness distribution: Thermodynamics |
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5 | !!====================================================================== |
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6 | !! History : - ! (W. H. Lipscomb and E.C. Hunke) CICE (c) original code |
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7 | !! 3.0 ! 2005-12 (M. Vancoppenolle) adaptation to LIM-3 |
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8 | !! - ! 2006-06 (M. Vancoppenolle) adaptation to include salt, age |
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9 | !! - ! 2007-04 (M. Vancoppenolle) Mass conservation checked |
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10 | !!---------------------------------------------------------------------- |
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11 | #if defined key_lim3 |
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12 | !!---------------------------------------------------------------------- |
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13 | !! 'key_lim3' : LIM3 sea-ice model |
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14 | !!---------------------------------------------------------------------- |
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15 | !! lim_itd_th_rem : |
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16 | !! lim_itd_th_reb : |
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17 | !! lim_itd_glinear : |
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18 | !! lim_itd_shiftice : |
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19 | !!---------------------------------------------------------------------- |
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20 | USE par_oce ! ocean parameters |
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21 | USE dom_oce ! ocean domain |
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22 | USE phycst ! physical constants (ocean directory) |
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23 | USE thd_ice ! LIM-3 thermodynamic variables |
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24 | USE ice ! LIM-3 variables |
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25 | USE limvar ! LIM-3 variables |
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26 | USE limcons ! conservation tests |
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27 | USE limtab |
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28 | ! |
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29 | USE prtctl ! Print control |
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30 | USE in_out_manager ! I/O manager |
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31 | USE lib_mpp ! MPP library |
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32 | USE lib_fortran ! to use key_nosignedzero |
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33 | |
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34 | IMPLICIT NONE |
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35 | PRIVATE |
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36 | |
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37 | PUBLIC lim_itd_th_rem ! called in limthd |
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38 | PUBLIC lim_itd_th_reb ! called in icecor |
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39 | |
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40 | !!---------------------------------------------------------------------- |
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41 | !! NEMO/LIM3 4.0 , UCL - NEMO Consortium (2010) |
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42 | !! $Id$ |
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43 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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44 | !!---------------------------------------------------------------------- |
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45 | CONTAINS |
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46 | |
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47 | SUBROUTINE lim_itd_th_rem( kt ) |
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48 | !!------------------------------------------------------------------ |
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49 | !! *** ROUTINE lim_itd_th_rem *** |
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50 | !! |
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51 | !! ** Purpose : computes the redistribution of ice thickness |
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52 | !! after thermodynamic growth of ice thickness |
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53 | !! |
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54 | !! ** Method : Linear remapping |
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55 | !! |
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56 | !! References : W.H. Lipscomb, JGR 2001 |
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57 | !!------------------------------------------------------------------ |
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58 | INTEGER , INTENT (in) :: kt ! Ocean time step |
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59 | ! |
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60 | INTEGER :: ji, jj, jl, jcat ! dummy loop index |
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61 | INTEGER :: nidx2 ! local integer |
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62 | REAL(wp) :: zx1, zwk1, zdh0, zetamin, zdamax ! local scalars |
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63 | REAL(wp) :: zx2, zwk2, zda0, zetamax ! - - |
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64 | REAL(wp) :: zx3 |
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65 | REAL(wp) :: zslope ! used to compute local thermodynamic "speeds" |
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66 | REAL(wp) :: zvi_b, zsmv_b, zei_b, zfs_b, zfw_b, zft_b ! conservation check |
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67 | |
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68 | INTEGER , DIMENSION(jpij) :: idxice2 ! compute remapping or not |
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69 | INTEGER , DIMENSION(jpij,jpl-1) :: jdonor ! donor category index |
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70 | REAL(wp), DIMENSION(jpij,jpl) :: zdhice ! ice thickness increment |
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71 | REAL(wp), DIMENSION(jpij,jpl) :: g0, g1 ! coefficients for fitting the line of the ITD |
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72 | REAL(wp), DIMENSION(jpij,jpl) :: hL, hR ! left and right boundary for the ITD for each thickness |
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73 | REAL(wp), DIMENSION(jpij,jpl-1) :: zdaice, zdvice ! local increment of ice area and volume |
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74 | REAL(wp), DIMENSION(jpij) :: zhb0, zhb1 ! category boundaries for thinnes categories |
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75 | REAL(wp), DIMENSION(jpij,0:jpl) :: zhbnew ! new boundaries of ice categories |
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76 | !!------------------------------------------------------------------ |
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77 | |
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78 | IF( kt == nit000 .AND. lwp) THEN |
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79 | WRITE(numout,*) |
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80 | WRITE(numout,*) 'lim_itd_th_rem : Remapping the ice thickness distribution' |
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81 | WRITE(numout,*) '~~~~~~~~~~~~~~~' |
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82 | ENDIF |
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83 | |
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84 | IF( ln_limdiachk ) CALL lim_cons_hsm(0, 'limitd_th_rem', zvi_b, zsmv_b, zei_b, zfw_b, zfs_b, zft_b) |
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85 | |
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86 | !----------------------------------------------------------------------------------------------- |
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87 | ! 1) Identify grid cells with ice |
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88 | !----------------------------------------------------------------------------------------------- |
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89 | nidx = 0 ; idxice(:) = 0 |
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90 | DO jj = 1, jpj |
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91 | DO ji = 1, jpi |
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92 | IF ( at_i(ji,jj) > epsi10 ) THEN |
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93 | nidx = nidx + 1 |
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94 | idxice( nidx ) = (jj - 1) * jpi + ji |
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95 | ENDIF |
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96 | END DO |
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97 | END DO |
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98 | |
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99 | !----------------------------------------------------------------------------------------------- |
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100 | ! 2) Compute new category boundaries |
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101 | !----------------------------------------------------------------------------------------------- |
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102 | IF( nidx > 0 ) THEN |
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103 | |
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104 | zdhice(:,:) = 0._wp |
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105 | zhbnew(:,:) = 0._wp |
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106 | |
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107 | CALL tab_3d_2d( nidx, idxice(1:nidx), ht_i_2d (1:nidx,1:jpl), ht_i ) |
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108 | CALL tab_3d_2d( nidx, idxice(1:nidx), ht_ib_2d(1:nidx,1:jpl), ht_i_b ) |
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109 | CALL tab_3d_2d( nidx, idxice(1:nidx), a_i_2d (1:nidx,1:jpl), a_i ) |
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110 | CALL tab_3d_2d( nidx, idxice(1:nidx), a_ib_2d (1:nidx,1:jpl), a_i_b ) |
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111 | |
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112 | DO jl = 1, jpl |
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113 | ! Compute thickness change in each ice category |
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114 | DO ji = 1, nidx |
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115 | zdhice(ji,jl) = ht_i_2d(ji,jl) - ht_ib_2d(ji,jl) |
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116 | END DO |
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117 | END DO |
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118 | |
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119 | ! --- New boundaries for category 1:jpl-1 --- ! |
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120 | DO jl = 1, jpl - 1 |
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121 | |
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122 | DO ji = 1, nidx |
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123 | ! |
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124 | ! --- New boundary: Hn* = Hn + Fn*dt --- ! |
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125 | ! Fn*dt = ( fn + (fn+1 - fn)/(hn+1 - hn) * (Hn - hn) ) * dt = zdhice + zslope * (Hmax - ht_i_b) |
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126 | ! |
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127 | IF ( a_ib_2d(ji,jl) > epsi10 .AND. a_ib_2d(ji,jl+1) > epsi10 ) THEN ! a(jl+1) & a(jl) /= 0 |
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128 | zslope = ( zdhice(ji,jl+1) - zdhice(ji,jl) ) / ( ht_ib_2d(ji,jl+1) - ht_ib_2d(ji,jl) ) |
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129 | zhbnew(ji,jl) = hi_max(jl) + zdhice(ji,jl) + zslope * ( hi_max(jl) - ht_ib_2d(ji,jl) ) |
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130 | ELSEIF( a_ib_2d(ji,jl) > epsi10 .AND. a_ib_2d(ji,jl+1) <= epsi10 ) THEN ! a(jl+1)=0 => Hn* = Hn + fn*dt |
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131 | zhbnew(ji,jl) = hi_max(jl) + zdhice(ji,jl) |
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132 | ELSEIF( a_ib_2d(ji,jl) <= epsi10 .AND. a_ib_2d(ji,jl+1) > epsi10 ) THEN ! a(jl)=0 => Hn* = Hn + fn+1*dt |
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133 | zhbnew(ji,jl) = hi_max(jl) + zdhice(ji,jl+1) |
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134 | ELSE ! a(jl+1) & a(jl) = 0 |
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135 | zhbnew(ji,jl) = hi_max(jl) |
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136 | ENDIF |
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137 | |
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138 | ! --- 2 conditions for remapping --- ! |
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139 | ! 1) hn(t+1)+espi < Hn* < hn+1(t+1)-epsi |
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140 | ! Note: hn(t+1) must not be too close to either HR or HL otherwise a division by nearly 0 is possible |
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141 | ! in lim_itd_glinear in the case (HR-HL) = 3(Hice - HL) or = 3(HR - Hice) |
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142 | IF( a_i_2d(ji,jl ) > epsi10 .AND. ht_i_2d(ji,jl ) > ( zhbnew(ji,jl) - epsi10 ) ) idxice(ji) = 0 |
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143 | IF( a_i_2d(ji,jl+1) > epsi10 .AND. ht_i_2d(ji,jl+1) < ( zhbnew(ji,jl) + epsi10 ) ) idxice(ji) = 0 |
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144 | |
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145 | ! 2) Hn-1 < Hn* < Hn+1 |
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146 | IF( zhbnew(ji,jl) < hi_max(jl-1) ) idxice(ji) = 0 |
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147 | IF( zhbnew(ji,jl) > hi_max(jl+1) ) idxice(ji) = 0 |
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148 | |
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149 | END DO |
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150 | END DO |
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151 | |
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152 | ! --- New boundaries for category jpl --- ! |
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153 | DO ji = 1, nidx |
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154 | IF( a_i_2d(ji,jpl) > epsi10 ) THEN |
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155 | zhbnew(ji,jpl) = MAX( hi_max(jpl-1), 3._wp * ht_i_2d(ji,jpl) - 2._wp * zhbnew(ji,jpl-1) ) |
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156 | ELSE |
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157 | zhbnew(ji,jpl) = hi_max(jpl) |
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158 | ENDIF |
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159 | |
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160 | ! --- 1 additional condition for remapping (1st category) --- ! |
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161 | ! H0+epsi < h1(t) < H1-epsi |
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162 | ! h1(t) must not be too close to either HR or HL otherwise a division by nearly 0 is possible |
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163 | ! in lim_itd_glinear in the case (HR-HL) = 3(Hice - HL) or = 3(HR - Hice) |
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164 | IF( ht_ib_2d(ji,1) < ( hi_max(0) + epsi10 ) ) idxice(ji) = 0 |
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165 | IF( ht_ib_2d(ji,1) > ( hi_max(1) - epsi10 ) ) idxice(ji) = 0 |
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166 | END DO |
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167 | |
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168 | !----------------------------------------------------------------------------------------------- |
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169 | ! 3) Identify cells where remapping |
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170 | !----------------------------------------------------------------------------------------------- |
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171 | nidx2 = 0 ; idxice2(:) = 0 |
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172 | DO ji = 1, nidx |
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173 | IF( idxice(ji) /= 0 ) THEN |
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174 | nidx2 = nidx2 + 1 |
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175 | idxice2(nidx2) = idxice(ji) |
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176 | zhbnew(nidx2,:) = zhbnew(ji,:) ! adjust zhbnew to new indices |
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177 | ENDIF |
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178 | END DO |
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179 | idxice(:) = idxice2(:) |
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180 | nidx = nidx2 |
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181 | |
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182 | ENDIF |
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183 | |
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184 | |
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185 | !----------------------------------------------------------------------------------------------- |
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186 | ! 4) Compute g(h) |
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187 | !----------------------------------------------------------------------------------------------- |
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188 | IF( nidx > 0 ) THEN |
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189 | |
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190 | zhb0(:) = hi_max(0) ; zhb1(:) = hi_max(1) |
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191 | g0(:,:) = 0._wp ; g1(:,:) = 0._wp |
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192 | hL(:,:) = 0._wp ; hR(:,:) = 0._wp |
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193 | |
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194 | DO jl = 1, jpl |
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195 | |
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196 | CALL tab_2d_1d( nidx, idxice(1:nidx), ht_ib_1d(1:nidx), ht_i_b(:,:,jl) ) |
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197 | CALL tab_2d_1d( nidx, idxice(1:nidx), ht_i_1d (1:nidx), ht_i(:,:,jl) ) |
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198 | CALL tab_2d_1d( nidx, idxice(1:nidx), a_i_1d (1:nidx), a_i(:,:,jl) ) |
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199 | CALL tab_2d_1d( nidx, idxice(1:nidx), v_i_1d (1:nidx), v_i(:,:,jl) ) |
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200 | |
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201 | IF( jl == 1 ) THEN |
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202 | |
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203 | ! --- g(h) for category 1 --- ! |
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204 | CALL lim_itd_glinear( zhb0(1:nidx), zhb1(1:nidx), ht_ib_1d(1:nidx), a_i_1d(1:nidx), & ! in |
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205 | & g0(1:nidx,1), g1(1:nidx,1), hL(1:nidx,1) , hR(1:nidx,1) ) ! out |
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206 | |
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207 | ! Area lost due to melting of thin ice |
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208 | DO ji = 1, nidx |
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209 | |
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210 | IF( a_i_1d(ji) > epsi10 ) THEN |
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211 | |
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212 | zdh0 = ht_i_1d(ji) - ht_ib_1d(ji) |
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213 | IF( zdh0 < 0.0 ) THEN !remove area from category 1 |
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214 | zdh0 = MIN( -zdh0, hi_max(1) ) |
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215 | !Integrate g(1) from 0 to dh0 to estimate area melted |
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216 | zetamax = MIN( zdh0, hR(ji,1) ) - hL(ji,1) |
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217 | |
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218 | IF( zetamax > 0.0 ) THEN |
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219 | zx1 = zetamax |
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220 | zx2 = 0.5 * zetamax * zetamax |
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221 | zda0 = g1(ji,1) * zx2 + g0(ji,1) * zx1 ! ice area removed |
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222 | zdamax = a_i_1d(ji) * (1.0 - ht_i_1d(ji) / ht_ib_1d(ji) ) ! Constrain new thickness <= ht_i |
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223 | zda0 = MIN( zda0, zdamax ) ! ice area lost due to melting |
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224 | ! of thin ice (zdamax > 0) |
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225 | ! Remove area, conserving volume |
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226 | ht_i_1d(ji) = ht_i_1d(ji) * a_i_1d(ji) / ( a_i_1d(ji) - zda0 ) |
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227 | a_i_1d(ji) = a_i_1d(ji) - zda0 |
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228 | v_i_1d(ji) = a_i_1d(ji) * ht_i_1d(ji) ! clem-useless ? |
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229 | ENDIF |
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230 | |
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231 | ELSE ! if ice accretion zdh0 > 0 |
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232 | ! zhbnew was 0, and is shifted to the right to account for thin ice growth in openwater (F0 = f1) |
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233 | zhbnew(ji,0) = MIN( zdh0, hi_max(1) ) |
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234 | ENDIF |
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235 | |
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236 | ENDIF |
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237 | |
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238 | END DO |
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239 | |
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240 | CALL tab_1d_2d( nidx, idxice(1:nidx), ht_i_1d (1:nidx), ht_i(:,:,jl) ) |
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241 | CALL tab_1d_2d( nidx, idxice(1:nidx), a_i_1d (1:nidx), a_i(:,:,jl) ) |
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242 | CALL tab_1d_2d( nidx, idxice(1:nidx), v_i_1d (1:nidx), v_i(:,:,jl) ) |
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243 | |
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244 | ENDIF ! jl=1 |
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245 | |
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246 | ! --- g(h) for each thickness category --- ! |
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247 | CALL lim_itd_glinear( zhbnew(1:nidx,jl-1), zhbnew(1:nidx,jl), ht_i_1d(1:nidx), a_i_1d(1:nidx), & ! in |
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248 | & g0(1:nidx,jl) , g1(1:nidx,jl) , hL(1:nidx,jl) , hR(1:nidx,jl) ) ! out |
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249 | |
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250 | END DO |
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251 | |
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252 | !----------------------------------------------------------------------------------------------- |
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253 | ! 5) Compute area and volume to be shifted across each boundary (Eq. 18) |
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254 | !----------------------------------------------------------------------------------------------- |
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255 | DO jl = 1, jpl - 1 |
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256 | |
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257 | DO ji = 1, nidx |
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258 | |
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259 | ! left and right integration limits in eta space |
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260 | IF (zhbnew(ji,jl) > hi_max(jl)) THEN ! Hn* > Hn => transfer from jl to jl+1 |
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261 | zetamin = MAX( hi_max(jl) , hL(ji,jl) ) - hL(ji,jl) ! hi_max(jl) - hL |
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262 | zetamax = MIN( zhbnew(ji,jl), hR(ji,jl) ) - hL(ji,jl) ! hR - hL |
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263 | jdonor(ji,jl) = jl |
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264 | ELSE ! Hn* <= Hn => transfer from jl+1 to jl |
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265 | zetamin = 0.0 |
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266 | zetamax = MIN( hi_max(jl), hR(ji,jl+1) ) - hL(ji,jl+1) ! hi_max(jl) - hL |
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267 | jdonor(ji,jl) = jl + 1 |
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268 | ENDIF |
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269 | zetamax = MAX( zetamax, zetamin ) ! no transfer if etamax < etamin |
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270 | |
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271 | zx1 = zetamax - zetamin |
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272 | zwk1 = zetamin * zetamin |
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273 | zwk2 = zetamax * zetamax |
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274 | zx2 = 0.5 * ( zwk2 - zwk1 ) |
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275 | zwk1 = zwk1 * zetamin |
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276 | zwk2 = zwk2 * zetamax |
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277 | zx3 = 1.0 / 3.0 * ( zwk2 - zwk1 ) |
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278 | jcat = jdonor(ji,jl) |
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279 | zdaice(ji,jl) = g1(ji,jcat)*zx2 + g0(ji,jcat)*zx1 |
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280 | zdvice(ji,jl) = g1(ji,jcat)*zx3 + g0(ji,jcat)*zx2 + zdaice(ji,jl)*hL(ji,jcat) |
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281 | |
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282 | END DO |
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283 | END DO |
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284 | |
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285 | !---------------------------------------------------------------------------------------------- |
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286 | ! 6) Shift ice between categories |
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287 | !---------------------------------------------------------------------------------------------- |
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288 | CALL lim_itd_shiftice ( jdonor(1:nidx,:), zdaice(1:nidx,:), zdvice(1:nidx,:) ) |
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289 | |
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290 | !---------------------------------------------------------------------------------------------- |
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291 | ! 7) Make sure ht_i >= minimum ice thickness hi_min |
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292 | !---------------------------------------------------------------------------------------------- |
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293 | CALL tab_2d_1d( nidx, idxice(1:nidx), ht_i_1d (1:nidx), ht_i(:,:,1) ) |
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294 | CALL tab_2d_1d( nidx, idxice(1:nidx), a_i_1d (1:nidx), a_i(:,:,1) ) |
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295 | CALL tab_2d_1d( nidx, idxice(1:nidx), a_ip_1d (1:nidx), a_ip(:,:,1) ) |
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296 | |
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297 | DO ji = 1, nidx |
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298 | IF ( a_i_1d(ji) > epsi10 .AND. ht_i_1d(ji) < rn_himin ) THEN |
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299 | a_i_1d (ji) = a_i_1d(ji) * ht_i_1d(ji) / rn_himin |
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300 | ! MV MP 2016 |
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301 | IF ( nn_pnd_scheme > 0 ) THEN |
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302 | a_ip_1d(ji) = a_ip_1d(ji) * ht_i_1d(ji) / rn_himin |
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303 | ENDIF |
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304 | ! END MV MP 2016 |
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305 | ht_i_1d(ji) = rn_himin |
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306 | ENDIF |
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307 | END DO |
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308 | |
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309 | CALL tab_1d_2d( nidx, idxice(1:nidx), ht_i_1d (1:nidx), ht_i(:,:,1) ) |
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310 | CALL tab_1d_2d( nidx, idxice(1:nidx), a_i_1d (1:nidx), a_i(:,:,1) ) |
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311 | CALL tab_1d_2d( nidx, idxice(1:nidx), a_ip_1d (1:nidx), a_ip(:,:,1) ) |
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312 | |
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313 | ENDIF |
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314 | |
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315 | IF( ln_limdiachk ) CALL lim_cons_hsm(1, 'limitd_th_rem', zvi_b, zsmv_b, zei_b, zfw_b, zfs_b, zft_b) |
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316 | |
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317 | END SUBROUTINE lim_itd_th_rem |
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318 | |
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319 | |
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320 | SUBROUTINE lim_itd_glinear( HbL, Hbr, phice, paice, pg0, pg1, phL, phR ) |
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321 | !!------------------------------------------------------------------ |
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322 | !! *** ROUTINE lim_itd_glinear *** |
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323 | !! |
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324 | !! ** Purpose : build g(h) satisfying area and volume constraints (Eq. 6 and 9) |
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325 | !! |
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326 | !! ** Method : g(h) is linear and written as: g(eta) = g1(eta) + g0 |
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327 | !! with eta = h - HL |
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328 | !! |
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329 | !!------------------------------------------------------------------ |
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330 | REAL(wp), DIMENSION(:), INTENT(in ) :: HbL, HbR ! left and right category boundaries |
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331 | REAL(wp), DIMENSION(:), INTENT(in ) :: phice, paice ! ice thickness and concentration |
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332 | REAL(wp), DIMENSION(:), INTENT(inout) :: pg0, pg1 ! coefficients in linear equation for g(eta) |
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333 | REAL(wp), DIMENSION(:), INTENT(inout) :: phL, phR ! min and max value of range over which g(h) > 0 |
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334 | ! |
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335 | INTEGER :: ji ! horizontal indices |
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336 | REAL(wp) :: zh13 ! HbL + 1/3 * (HbR - HbL) |
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337 | REAL(wp) :: zh23 ! HbL + 2/3 * (HbR - HbL) |
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338 | REAL(wp) :: zdhr ! 1 / (hR - hL) |
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339 | REAL(wp) :: zwk1, zwk2 ! temporary variables |
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340 | !!------------------------------------------------------------------ |
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341 | ! |
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342 | DO ji = 1, nidx |
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343 | ! |
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344 | IF( paice(ji) > epsi10 .AND. phice(ji) > 0._wp ) THEN |
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345 | |
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346 | ! Initialize hL and hR |
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347 | phL(ji) = HbL(ji) |
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348 | phR(ji) = HbR(ji) |
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349 | |
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350 | ! Change hL or hR if hice falls outside central third of range, |
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351 | ! so that hice is in the central third of the range [HL HR] |
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352 | zh13 = 1.0 / 3.0 * ( 2.0 * phL(ji) + phR(ji) ) |
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353 | zh23 = 1.0 / 3.0 * ( phL(ji) + 2.0 * phR(ji) ) |
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354 | |
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355 | IF ( phice(ji) < zh13 ) THEN ; phR(ji) = 3._wp * phice(ji) - 2._wp * phL(ji) ! move HR to the left |
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356 | ELSEIF( phice(ji) > zh23 ) THEN ; phL(ji) = 3._wp * phice(ji) - 2._wp * phR(ji) ! move HL to the right |
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357 | ENDIF |
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358 | |
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359 | ! Compute coefficients of g(eta) = g0 + g1*eta |
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360 | zdhr = 1._wp / (phR(ji) - phL(ji)) |
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361 | zwk1 = 6._wp * paice(ji) * zdhr |
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362 | zwk2 = ( phice(ji) - phL(ji) ) * zdhr |
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363 | pg0(ji) = zwk1 * ( 2._wp / 3._wp - zwk2 ) ! Eq. 14 |
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364 | pg1(ji) = 2._wp * zdhr * zwk1 * ( zwk2 - 0.5 ) ! Eq. 14 |
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365 | ! |
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366 | ELSE ! remap_flag = .false. or a_i < epsi10 |
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367 | phL(ji) = 0._wp |
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368 | phR(ji) = 0._wp |
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369 | pg0(ji) = 0._wp |
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370 | pg1(ji) = 0._wp |
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371 | ENDIF |
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372 | ! |
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373 | END DO |
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374 | ! |
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375 | END SUBROUTINE lim_itd_glinear |
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376 | |
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377 | |
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378 | SUBROUTINE lim_itd_shiftice( kdonor, pdaice, pdvice ) |
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379 | !!------------------------------------------------------------------ |
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380 | !! *** ROUTINE lim_itd_shiftice *** |
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381 | !! |
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382 | !! ** Purpose : shift ice across category boundaries, conserving everything |
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383 | !! ( area, volume, energy, age*vol, and mass of salt ) |
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384 | !! |
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385 | !! ** Method : |
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386 | !!------------------------------------------------------------------ |
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387 | INTEGER , DIMENSION(:,:), INTENT(in) :: kdonor ! donor category index |
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388 | REAL(wp), DIMENSION(:,:), INTENT(in) :: pdaice ! ice area transferred across boundary |
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389 | REAL(wp), DIMENSION(:,:), INTENT(in) :: pdvice ! ice volume transferred across boundary |
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390 | |
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391 | INTEGER :: ii,ij, ji, jj, jl, jl2, jl1, jk ! dummy loop indices |
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392 | |
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393 | REAL(wp), DIMENSION(jpij,jpl) :: zaTsfn |
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394 | REAL(wp), DIMENSION(jpij) :: zworka ! temporary array used here |
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395 | REAL(wp), DIMENSION(jpij) :: zworkv ! temporary array used here |
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396 | |
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397 | REAL(wp) :: ztrans ! ice/snow transferred |
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398 | !!------------------------------------------------------------------ |
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399 | |
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400 | CALL tab_3d_2d( nidx, idxice(1:nidx), ht_i_2d (1:nidx,1:jpl), ht_i ) |
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401 | CALL tab_3d_2d( nidx, idxice(1:nidx), a_i_2d (1:nidx,1:jpl), a_i ) |
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402 | CALL tab_3d_2d( nidx, idxice(1:nidx), v_i_2d (1:nidx,1:jpl), v_i ) |
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403 | CALL tab_3d_2d( nidx, idxice(1:nidx), v_s_2d (1:nidx,1:jpl), v_s ) |
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404 | CALL tab_3d_2d( nidx, idxice(1:nidx), oa_i_2d (1:nidx,1:jpl), oa_i ) |
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405 | CALL tab_3d_2d( nidx, idxice(1:nidx), smv_i_2d(1:nidx,1:jpl), smv_i ) |
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406 | CALL tab_3d_2d( nidx, idxice(1:nidx), a_ip_2d (1:nidx,1:jpl), a_ip ) |
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407 | CALL tab_3d_2d( nidx, idxice(1:nidx), v_ip_2d (1:nidx,1:jpl), v_ip ) |
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408 | CALL tab_3d_2d( nidx, idxice(1:nidx), t_su_2d (1:nidx,1:jpl), t_su ) |
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409 | |
---|
410 | !---------------------------------------------------------------------------------------------- |
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411 | ! 1) Define a variable equal to a_i*T_su |
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412 | !---------------------------------------------------------------------------------------------- |
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413 | DO jl = 1, jpl |
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414 | DO ji = 1, nidx |
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415 | zaTsfn(ji,jl) = a_i_2d(ji,jl) * t_su_2d(ji,jl) |
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416 | END DO |
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417 | END DO |
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418 | |
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419 | !------------------------------------------------------------------------------- |
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420 | ! 2) Transfer volume and energy between categories |
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421 | !------------------------------------------------------------------------------- |
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422 | DO jl = 1, jpl - 1 |
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423 | DO ji = 1, nidx |
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424 | |
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425 | jl1 = kdonor(ji,jl) |
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426 | IF ( jl1 == jl ) THEN ; jl2 = jl1+1 |
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427 | ELSE ; jl2 = jl |
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428 | ENDIF |
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429 | |
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430 | rswitch = MAX( 0._wp , SIGN( 1._wp , v_i_2d(ji,jl1) - epsi10 ) ) |
---|
431 | zworkv(ji) = pdvice(ji,jl) / MAX( v_i_2d(ji,jl1), epsi10 ) * rswitch |
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432 | |
---|
433 | rswitch = MAX( 0._wp , SIGN( 1._wp , a_i_2d(ji,jl1) - epsi10 ) ) |
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434 | zworka(ji) = pdaice(ji,jl) / MAX( a_i_2d(ji,jl1), epsi10 ) * rswitch |
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435 | |
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436 | ! Ice areas |
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437 | a_i_2d(ji,jl1) = a_i_2d(ji,jl1) - pdaice(ji,jl) |
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438 | a_i_2d(ji,jl2) = a_i_2d(ji,jl2) + pdaice(ji,jl) |
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439 | |
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440 | ! Ice volumes |
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441 | v_i_2d(ji,jl1) = v_i_2d(ji,jl1) - pdvice(ji,jl) |
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442 | v_i_2d(ji,jl2) = v_i_2d(ji,jl2) + pdvice(ji,jl) |
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443 | |
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444 | ! Snow volumes |
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445 | ztrans = v_s_2d(ji,jl1) * zworkv(ji) |
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446 | v_s_2d(ji,jl1) = v_s_2d(ji,jl1) - ztrans |
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447 | v_s_2d(ji,jl2) = v_s_2d(ji,jl2) + ztrans |
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448 | |
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449 | ! Ice age |
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450 | ztrans = oa_i_2d(ji,jl1) * pdaice(ji,jl) !!clem: should be * zworka(ji) but it does not work |
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451 | oa_i_2d(ji,jl1) = oa_i_2d(ji,jl1) - ztrans |
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452 | oa_i_2d(ji,jl2) = oa_i_2d(ji,jl2) + ztrans |
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453 | |
---|
454 | ! Ice salinity |
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455 | ztrans = smv_i_2d(ji,jl1) * zworkv(ji) |
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456 | smv_i_2d(ji,jl1) = smv_i_2d(ji,jl1) - ztrans |
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457 | smv_i_2d(ji,jl2) = smv_i_2d(ji,jl2) + ztrans |
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458 | |
---|
459 | ! Surface temperature |
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460 | ztrans = t_su_2d(ji,jl1) * pdaice(ji,jl) !!clem: should be * zworka(ji) but it does not work |
---|
461 | zaTsfn(ji,jl1) = zaTsfn(ji,jl1) - ztrans |
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462 | zaTsfn(ji,jl2) = zaTsfn(ji,jl2) + ztrans |
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463 | |
---|
464 | ! MV MP 2016 |
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465 | IF ( nn_pnd_scheme > 0 ) THEN |
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466 | ! Pond fraction |
---|
467 | ztrans = a_ip_2d(ji,jl1) * pdaice(ji,jl) !!clem: should be * zworka(ji) but it does not work |
---|
468 | a_ip_2d(ji,jl1) = a_ip_2d(ji,jl1) - ztrans |
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469 | a_ip_2d(ji,jl2) = a_ip_2d(ji,jl2) + ztrans |
---|
470 | |
---|
471 | ! Pond volume (also proportional to da/a) |
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472 | ztrans = v_ip_2d(ji,jl1) * pdaice(ji,jl) !!clem: should be * zworka(ji) but it does not work |
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473 | v_ip_2d(ji,jl1) = v_ip_2d(ji,jl1) - ztrans |
---|
474 | v_ip_2d(ji,jl2) = v_ip_2d(ji,jl2) + ztrans |
---|
475 | ENDIF |
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476 | ! END MV MP 2016 |
---|
477 | |
---|
478 | END DO |
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479 | |
---|
480 | ! Snow heat content |
---|
481 | DO jk = 1, nlay_s |
---|
482 | |
---|
483 | DO ji = 1, nidx |
---|
484 | ii = MOD( idxice(ji) - 1, jpi ) + 1 |
---|
485 | ij = ( idxice(ji) - 1 ) / jpi + 1 |
---|
486 | |
---|
487 | jl1 = kdonor(ji,jl) |
---|
488 | IF(jl1 == jl) THEN ; jl2 = jl+1 |
---|
489 | ELSE ; jl2 = jl |
---|
490 | ENDIF |
---|
491 | |
---|
492 | ztrans = e_s(ii,ij,jk,jl1) * zworkv(ji) |
---|
493 | e_s(ii,ij,jk,jl1) = e_s(ii,ij,jk,jl1) - ztrans |
---|
494 | e_s(ii,ij,jk,jl2) = e_s(ii,ij,jk,jl2) + ztrans |
---|
495 | END DO |
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496 | END DO |
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497 | |
---|
498 | |
---|
499 | ! Ice heat content |
---|
500 | DO jk = 1, nlay_i |
---|
501 | DO ji = 1, nidx |
---|
502 | ii = MOD( idxice(ji) - 1, jpi ) + 1 |
---|
503 | ij = ( idxice(ji) - 1 ) / jpi + 1 |
---|
504 | |
---|
505 | jl1 = kdonor(ji,jl) |
---|
506 | IF(jl1 == jl) THEN ; jl2 = jl+1 |
---|
507 | ELSE ; jl2 = jl |
---|
508 | ENDIF |
---|
509 | |
---|
510 | ztrans = e_i(ii,ij,jk,jl1) * zworkv(ji) |
---|
511 | e_i(ii,ij,jk,jl1) = e_i(ii,ij,jk,jl1) - ztrans |
---|
512 | e_i(ii,ij,jk,jl2) = e_i(ii,ij,jk,jl2) + ztrans |
---|
513 | END DO |
---|
514 | END DO |
---|
515 | |
---|
516 | END DO ! boundaries, 1 to jpl-1 |
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517 | |
---|
518 | !------------------------------------------------------------------------------- |
---|
519 | ! 3) Update ice thickness and temperature |
---|
520 | !------------------------------------------------------------------------------- |
---|
521 | DO jl = 1, jpl |
---|
522 | DO ji = 1, nidx |
---|
523 | IF ( a_i_2d(ji,jl) > epsi10 ) THEN |
---|
524 | ht_i_2d(ji,jl) = v_i_2d (ji,jl) / a_i_2d(ji,jl) |
---|
525 | t_su_2d(ji,jl) = zaTsfn(ji,jl) / a_i_2d(ji,jl) |
---|
526 | ELSE |
---|
527 | ht_i_2d(ji,jl) = 0._wp |
---|
528 | t_su_2d(ji,jl) = rt0 |
---|
529 | ENDIF |
---|
530 | END DO |
---|
531 | END DO |
---|
532 | |
---|
533 | CALL tab_2d_3d( nidx, idxice(1:nidx), ht_i_2d (1:nidx,1:jpl), ht_i ) |
---|
534 | CALL tab_2d_3d( nidx, idxice(1:nidx), a_i_2d (1:nidx,1:jpl), a_i ) |
---|
535 | CALL tab_2d_3d( nidx, idxice(1:nidx), v_i_2d (1:nidx,1:jpl), v_i ) |
---|
536 | CALL tab_2d_3d( nidx, idxice(1:nidx), v_s_2d (1:nidx,1:jpl), v_s ) |
---|
537 | CALL tab_2d_3d( nidx, idxice(1:nidx), oa_i_2d (1:nidx,1:jpl), oa_i ) |
---|
538 | CALL tab_2d_3d( nidx, idxice(1:nidx), smv_i_2d(1:nidx,1:jpl), smv_i ) |
---|
539 | CALL tab_2d_3d( nidx, idxice(1:nidx), a_ip_2d (1:nidx,1:jpl), a_ip ) |
---|
540 | CALL tab_2d_3d( nidx, idxice(1:nidx), v_ip_2d (1:nidx,1:jpl), v_ip ) |
---|
541 | CALL tab_2d_3d( nidx, idxice(1:nidx), t_su_2d (1:nidx,1:jpl), t_su ) |
---|
542 | |
---|
543 | ! |
---|
544 | END SUBROUTINE lim_itd_shiftice |
---|
545 | |
---|
546 | |
---|
547 | SUBROUTINE lim_itd_th_reb |
---|
548 | !!------------------------------------------------------------------ |
---|
549 | !! *** ROUTINE lim_itd_th_reb *** |
---|
550 | !! |
---|
551 | !! ** Purpose : rebin - rebins thicknesses into defined categories |
---|
552 | !! |
---|
553 | !! ** Method : If a category thickness is out of bounds, shift part (for down to top) |
---|
554 | !! or entire (for top to down) area, volume, and energy |
---|
555 | !! to the neighboring category |
---|
556 | !!------------------------------------------------------------------ |
---|
557 | INTEGER :: ji, jj, jl ! dummy loop indices |
---|
558 | ! |
---|
559 | INTEGER , DIMENSION(jpij,jpl-1) :: jdonor ! donor category index |
---|
560 | REAL(wp), DIMENSION(jpij,jpl-1) :: zdaice, zdvice ! ice area and volume transferred |
---|
561 | !!------------------------------------------------------------------ |
---|
562 | |
---|
563 | DO jl = 1, jpl-1 |
---|
564 | jdonor(:,jl) = 0 |
---|
565 | zdaice(:,jl) = 0._wp |
---|
566 | zdvice(:,jl) = 0._wp |
---|
567 | END DO |
---|
568 | |
---|
569 | !--------------------------------------- |
---|
570 | ! identify thicknesses that are too big |
---|
571 | !--------------------------------------- |
---|
572 | DO jl = 1, jpl - 1 |
---|
573 | |
---|
574 | nidx = 0 ; idxice(:) = 0 |
---|
575 | DO jj = 1, jpj |
---|
576 | DO ji = 1, jpi |
---|
577 | IF( a_i(ji,jj,jl) > epsi10 .AND. v_i(ji,jj,jl) > (a_i(ji,jj,jl) * hi_max(jl)) ) THEN |
---|
578 | nidx = nidx + 1 |
---|
579 | idxice( nidx ) = (jj - 1) * jpi + ji |
---|
580 | ENDIF |
---|
581 | ENDDO |
---|
582 | ENDDO |
---|
583 | |
---|
584 | !!clem CALL tab_2d_1d( nidx, idxice(1:nidx), ht_i_1d (1:nidx), ht_i(:,:,jl) ) |
---|
585 | CALL tab_2d_1d( nidx, idxice(1:nidx), a_i_1d (1:nidx), a_i(:,:,jl) ) |
---|
586 | CALL tab_2d_1d( nidx, idxice(1:nidx), v_i_1d (1:nidx), v_i(:,:,jl) ) |
---|
587 | |
---|
588 | DO ji = 1, nidx |
---|
589 | jdonor(ji,jl) = jl |
---|
590 | ! how much of a_i you send in cat sup is somewhat arbitrary |
---|
591 | !!clem: these do not work properly after a restart (I do not know why) |
---|
592 | !! zdaice(ji,jl) = a_i_1d(ji) * ( ht_i_1d(ji) - hi_max(jl) + epsi10 ) / ht_i_1d(ji) |
---|
593 | !! zdvice(ji,jl) = v_i_1d(ji) - ( a_i_1d(ji) - zdaice(ji,jl) ) * ( hi_max(jl) - epsi10 ) |
---|
594 | !!clem: these do not work properly after a restart (I do not know why) |
---|
595 | !! zdaice(ji,jl) = a_i_1d(ji) |
---|
596 | !! zdvice(ji,jl) = v_i_1d(ji) |
---|
597 | !!clem: these are from UCL and work ok |
---|
598 | zdaice(ji,jl) = a_i_1d(ji) * 0.5_wp |
---|
599 | zdvice(ji,jl) = v_i_1d(ji) - zdaice(ji,jl) * ( hi_max(jl) + hi_max(jl-1) ) * 0.5_wp |
---|
600 | |
---|
601 | END DO |
---|
602 | |
---|
603 | IF( nidx > 0 ) THEN |
---|
604 | CALL lim_itd_shiftice( jdonor(1:nidx,:), zdaice(1:nidx,:), zdvice(1:nidx,:) ) ! Shift jl=>jl+1 |
---|
605 | ! Reset shift parameters |
---|
606 | jdonor(1:nidx,jl) = 0 |
---|
607 | zdaice(1:nidx,jl) = 0._wp |
---|
608 | zdvice(1:nidx,jl) = 0._wp |
---|
609 | ENDIF |
---|
610 | ! |
---|
611 | END DO |
---|
612 | |
---|
613 | !----------------------------------------- |
---|
614 | ! Identify thicknesses that are too small |
---|
615 | !----------------------------------------- |
---|
616 | DO jl = jpl - 1, 1, -1 |
---|
617 | |
---|
618 | nidx = 0 ; idxice(:) = 0 |
---|
619 | DO jj = 1, jpj |
---|
620 | DO ji = 1, jpi |
---|
621 | IF( a_i(ji,jj,jl+1) > epsi10 .AND. v_i(ji,jj,jl+1) <= (a_i(ji,jj,jl+1) * hi_max(jl)) ) THEN |
---|
622 | nidx = nidx + 1 |
---|
623 | idxice( nidx ) = (jj - 1) * jpi + ji |
---|
624 | ENDIF |
---|
625 | ENDDO |
---|
626 | ENDDO |
---|
627 | |
---|
628 | CALL tab_2d_1d( nidx, idxice(1:nidx), a_i_1d (1:nidx), a_i(:,:,jl+1) ) ! jl+1 is ok |
---|
629 | CALL tab_2d_1d( nidx, idxice(1:nidx), v_i_1d (1:nidx), v_i(:,:,jl+1) ) ! jl+1 is ok |
---|
630 | DO ji = 1, nidx |
---|
631 | jdonor(ji,jl) = jl + 1 |
---|
632 | zdaice(ji,jl) = a_i_1d(ji) |
---|
633 | zdvice(ji,jl) = v_i_1d(ji) |
---|
634 | END DO |
---|
635 | |
---|
636 | IF( nidx > 0 ) THEN |
---|
637 | CALL lim_itd_shiftice( jdonor(1:nidx,:), zdaice(1:nidx,:), zdvice(1:nidx,:) ) ! Shift jl+1=>jl |
---|
638 | ! Reset shift parameters |
---|
639 | jdonor(1:nidx,jl) = 0 |
---|
640 | zdaice(1:nidx,jl) = 0._wp |
---|
641 | zdvice(1:nidx,jl) = 0._wp |
---|
642 | ENDIF |
---|
643 | |
---|
644 | END DO |
---|
645 | ! |
---|
646 | END SUBROUTINE lim_itd_th_reb |
---|
647 | |
---|
648 | #else |
---|
649 | !!---------------------------------------------------------------------- |
---|
650 | !! Default option Dummy module NO LIM sea-ice model |
---|
651 | !!---------------------------------------------------------------------- |
---|
652 | CONTAINS |
---|
653 | SUBROUTINE lim_itd_th_rem |
---|
654 | END SUBROUTINE lim_itd_th_rem |
---|
655 | SUBROUTINE lim_itd_glinear |
---|
656 | END SUBROUTINE lim_itd_glinear |
---|
657 | SUBROUTINE lim_itd_shiftice |
---|
658 | END SUBROUTINE lim_itd_shiftice |
---|
659 | SUBROUTINE lim_itd_th_reb |
---|
660 | END SUBROUTINE lim_itd_th_reb |
---|
661 | #endif |
---|
662 | !!====================================================================== |
---|
663 | END MODULE limitd_th |
---|