1 | MODULE limthd_ent |
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2 | #if defined key_lim3 |
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3 | !!---------------------------------------------------------------------- |
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4 | !! 'key_lim3' LIM3 sea-ice model |
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5 | !!---------------------------------------------------------------------- |
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6 | !!====================================================================== |
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7 | !! *** MODULE limthd_ent *** |
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8 | !! Redistribution of Enthalpy in the ice |
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9 | !! on the new vertical grid |
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10 | !! after vertical growth/decay |
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11 | !!====================================================================== |
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12 | !! lim_thd_ent : ice redistribution of enthalpy |
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13 | |
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14 | !! * Modules used |
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15 | USE par_oce ! ocean parameters |
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16 | USE dom_oce |
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17 | USE domain |
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18 | USE in_out_manager |
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19 | USE phycst |
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20 | USE ice_oce ! ice variables |
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21 | USE thd_ice |
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22 | USE iceini |
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23 | USE limistate |
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24 | USE ice |
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25 | USE limvar |
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26 | USE par_ice |
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27 | USE lib_mpp |
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28 | |
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29 | IMPLICIT NONE |
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30 | PRIVATE |
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31 | |
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32 | !! * Routine accessibility |
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33 | PUBLIC lim_thd_ent ! called by lim_thd |
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34 | |
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35 | !! * Module variables |
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36 | REAL(wp) :: & ! constant values |
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37 | epsi20 = 1.e-20 , & |
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38 | epsi13 = 1.e-13 , & |
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39 | zzero = 0.e0 , & |
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40 | zone = 1.e0 , & |
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41 | epsi10 = 1.0e-10 |
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42 | |
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43 | !!---------------------------------------------------------------------- |
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44 | !! LIM 3.0, UCL-LOCEAN-IPSL (2005) |
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45 | !! $Id$ |
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46 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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47 | !!---------------------------------------------------------------------- |
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48 | |
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49 | CONTAINS |
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50 | |
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51 | SUBROUTINE lim_thd_ent(kideb,kiut,jl) |
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52 | !!------------------------------------------------------------------- |
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53 | !! *** ROUTINE lim_thd_ent *** |
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54 | !! |
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55 | !! ** Purpose : |
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56 | !! This routine computes new vertical grids |
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57 | !! in the ice and in the snow, and consistently redistributes |
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58 | !! temperatures in the snow / ice. |
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59 | !! Redistribution is made so as to ensure to energy conservation |
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60 | !! |
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61 | !! |
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62 | !! ** Method : linear conservative remapping |
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63 | !! |
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64 | !! ** Steps : 1) Grid |
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65 | !! 2) Switches |
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66 | !! 3) Snow redistribution |
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67 | !! 4) Ice enthalpy redistribution |
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68 | !! 5) Ice salinity, recover temperature |
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69 | !! |
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70 | !! ** Arguments |
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71 | !! |
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72 | !! ** Inputs / Outputs |
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73 | !! |
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74 | !! ** External |
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75 | !! |
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76 | !! ** References : Bitz & Lipscomb, JGR 99; Vancoppenolle et al., GRL, 2005 |
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77 | !! |
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78 | !! ** History : (05-2003) Martin V. UCL-Astr |
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79 | !! (07-2005) Martin for 3d adapatation |
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80 | !! (11-2006) Vectorized by Xavier Fettweis (ASTR) |
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81 | !! (03-2008) Energy conservation and clean code |
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82 | !! * Arguments |
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83 | |
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84 | INTEGER , INTENT(IN):: & |
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85 | kideb , & ! start point on which the the computation is applied |
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86 | kiut , & ! end point on which the the computation is applied |
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87 | jl ! thickness category number |
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88 | |
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89 | INTEGER :: & |
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90 | ji,jk , & ! dummy loop indices |
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91 | zji, zjj , & ! dummy indices |
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92 | ntop0 , & ! old layer top index |
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93 | nbot1 , & ! new layer bottom index |
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94 | ntop1 , & ! new layer top index |
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95 | limsum , & ! temporary loop index |
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96 | nlayi0,nlays0 , & ! old number of layers |
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97 | maxnbot0 , & ! old layer bottom index |
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98 | layer0, layer1 ! old/new layer indexes |
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99 | |
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100 | INTEGER, DIMENSION(jpij) :: & |
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101 | snswi , & ! snow switch |
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102 | nbot0 , & ! old layer bottom index |
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103 | icsuind , & ! ice surface index |
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104 | icsuswi , & ! ice surface switch |
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105 | icboind , & ! ice bottom index |
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106 | icboswi , & ! ice bottom switch |
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107 | snicind , & ! snow ice index |
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108 | snicswi , & ! snow ice switch |
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109 | snind ! snow index |
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110 | |
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111 | REAL(wp) :: & |
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112 | zeps, zeps6 , & ! numerical constant very small |
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113 | ztmelts , & ! ice melting point |
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114 | zqsnic , & ! enthalpy of snow ice layer |
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115 | zhsnow , & ! temporary snow thickness variable |
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116 | zswitch , & ! dummy switch argument |
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117 | zfac1 , & ! dummy factor |
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118 | zfac2 , & ! dummy factor |
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119 | ztform , & !: bottom formation temperature |
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120 | zaaa , & !: dummy factor |
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121 | zbbb , & !: dummy factor |
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122 | zccc , & !: dummy factor |
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123 | zdiscrim !: dummy factor |
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124 | |
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125 | REAL(wp), DIMENSION(jpij) :: & |
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126 | zh_i , & ! thickness of an ice layer |
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127 | zh_s , & ! thickness of a snow layer |
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128 | zqsnow , & ! enthalpy of the snow put in snow ice |
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129 | zdeltah ! temporary variable |
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130 | |
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131 | REAL(wp), DIMENSION(jpij,0:jkmax+3) :: & |
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132 | zm0 , & ! old layer-system vertical cotes |
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133 | qm0 , & ! old layer-system heat content |
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134 | z_s , & ! new snow system vertical cotes |
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135 | z_i , & ! new ice system vertical cotes |
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136 | zthick0 ! old ice thickness |
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137 | |
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138 | REAL(wp), DIMENSION(jpij,0:jkmax+3) :: & |
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139 | zhl0 ! old and new layer thicknesses |
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140 | |
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141 | REAL(wp), DIMENSION(0:jkmax+3,0:jkmax+3) :: & |
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142 | zrl01 |
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143 | |
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144 | ! Energy conservation |
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145 | REAL(wp), DIMENSION(jpij) :: & |
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146 | zqti_in, zqts_in, & |
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147 | zqti_fin, zqts_fin |
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148 | |
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149 | !------------------------------------------------------------------------------| |
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150 | |
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151 | zeps = 1.0d-20 |
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152 | zeps6 = 1.0d-06 |
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153 | zthick0(:,:) = 0.0 |
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154 | zm0(:,:) = 0.0 |
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155 | qm0(:,:) = 0.0 |
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156 | zrl01(:,:) = 0.0 |
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157 | zhl0(:,:) = 0.0 |
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158 | z_i(:,:) = 0.0 |
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159 | z_s(:,:) = 0.0 |
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160 | |
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161 | ! |
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162 | !------------------------------------------------------------------------------| |
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163 | ! 1) Grid | |
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164 | !------------------------------------------------------------------------------| |
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165 | ! |
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166 | nlays0 = nlay_s |
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167 | nlayi0 = nlay_i |
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168 | |
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169 | DO ji = kideb, kiut |
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170 | zh_i(ji) = old_ht_i_b(ji) / nlay_i |
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171 | zh_s(ji) = old_ht_s_b(ji) / nlay_s |
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172 | ENDDO |
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173 | |
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174 | ! |
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175 | !------------------------------------------------------------------------------| |
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176 | ! 2) Switches | |
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177 | !------------------------------------------------------------------------------| |
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178 | ! |
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179 | ! 2.1 snind(ji), snswi(ji) |
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180 | ! snow surface behaviour : computation of snind(ji)-snswi(ji) |
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181 | ! snind(ji) : index which equals |
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182 | ! 0 if snow is accumulating |
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183 | ! 1 if 1st layer is melting |
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184 | ! 2 if 2nd layer is melting ... |
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185 | DO ji = kideb, kiut |
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186 | snind(ji) = 0 |
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187 | zdeltah(ji) = 0.0 |
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188 | ENDDO !ji |
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189 | |
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190 | DO jk = 1, nlays0 |
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191 | DO ji = kideb, kiut |
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192 | snind(ji) = jk * INT(MAX(0.0,SIGN(1.0,-dh_s_tot(ji)-zdeltah(ji)-zeps))) & |
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193 | + snind(ji) * (1 - INT(MAX(0.0,SIGN(1.0,-dh_s_tot(ji)-zdeltah(ji)-zeps)))) |
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194 | zdeltah(ji)= zdeltah(ji) + zh_s(ji) |
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195 | END DO ! ji |
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196 | ENDDO ! jk |
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197 | |
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198 | ! snswi(ji) : switch which value equals 1 if snow melts |
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199 | ! 0 if not |
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200 | DO ji = kideb, kiut |
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201 | snswi(ji) = MAX(0,INT(-dh_s_tot(ji)/MAX(zeps,ABS(dh_s_tot(ji))))) |
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202 | ENDDO ! ji |
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203 | |
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204 | ! 2.2 icsuind(ji), icsuswi(ji) |
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205 | ! ice surface behaviour : computation of icsuind(ji)-icsuswi(ji) |
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206 | ! icsuind(ji) : index which equals |
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207 | ! 0 if nothing happens at the surface |
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208 | ! 1 if first layer is melting |
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209 | ! 2 if 2nd layer is reached by melt ... |
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210 | DO ji = kideb, kiut |
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211 | icsuind(ji) = 0 |
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212 | zdeltah(ji) = 0.0 |
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213 | ENDDO !ji |
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214 | DO jk = 1, nlayi0 |
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215 | DO ji = kideb, kiut |
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216 | icsuind(ji) = jk * INT(MAX(0.0,SIGN(1.0,-dh_i_surf(ji)-zdeltah(ji)-zeps))) & |
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217 | + icsuind(ji) * (1 - INT(MAX(0.0,SIGN(1.0,-dh_i_surf(ji)-zdeltah(ji)-zeps)))) |
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218 | zdeltah(ji) = zdeltah(ji) + zh_i(ji) |
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219 | END DO ! ji |
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220 | ENDDO !jk |
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221 | |
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222 | ! icsuswi(ji) : switch which equals |
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223 | ! 1 if ice melts at the surface |
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224 | ! 0 if not |
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225 | DO ji = kideb, kiut |
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226 | icsuswi(ji) = MAX(0,INT(-dh_i_surf(ji)/MAX(zeps , ABS(dh_i_surf(ji)) ) ) ) |
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227 | ENDDO |
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228 | |
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229 | ! 2.3 icboind(ji), icboswi(ji) |
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230 | ! ice bottom behaviour : computation of icboind(ji)-icboswi(ji) |
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231 | ! icboind(ji) : index which equals |
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232 | ! 0 if accretion is on the way |
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233 | ! 1 if last layer has started to melt |
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234 | ! 2 if penultiem layer is melting ... and so on |
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235 | ! N+1 if all layers melt and that snow transforms into ice |
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236 | DO ji = kideb, kiut |
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237 | icboind(ji) = 0 |
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238 | zdeltah(ji) = 0.0 |
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239 | ENDDO |
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240 | DO jk = nlayi0, 1, -1 |
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241 | DO ji = kideb, kiut |
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242 | icboind(ji) = (nlayi0+1-jk) & |
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243 | * INT(MAX(0.0,SIGN(1.0,-dh_i_bott(ji)-zdeltah(ji)-zeps))) & |
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244 | + icboind(ji) & |
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245 | * (1 - INT(MAX(0.0,SIGN(1.0,-dh_i_bott(ji)-zdeltah(ji)-zeps)))) |
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246 | zdeltah(ji) = zdeltah(ji) + zh_i(ji) |
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247 | END DO |
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248 | ENDDO |
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249 | |
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250 | DO ji = kideb, kiut |
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251 | ! case of total ablation with remaining snow |
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252 | IF ( ( ht_i_b(ji) .GT. zeps ) .AND. & |
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253 | ( ht_i_b(ji) - dh_snowice(ji) .LT. zeps ) ) icboind(ji) = nlay_i + 1 |
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254 | END DO |
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255 | |
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256 | ! icboswi(ji) : switch which equals |
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257 | ! 1 if ice accretion is on the way |
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258 | ! 0 if ablation is on the way |
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259 | DO ji = kideb, kiut |
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260 | icboswi(ji) = MAX(0,INT(dh_i_bott(ji) / MAX(zeps,ABS(dh_i_bott(ji))))) |
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261 | ENDDO |
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262 | |
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263 | ! 2.4 snicind(ji), snicswi(ji) |
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264 | ! snow ice formation : calcul de snicind(ji)-snicswi(ji) |
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265 | ! snicind(ji) : index which equals |
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266 | ! 0 if no snow-ice forms |
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267 | ! 1 if last layer of snow has started to melt |
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268 | ! 2 if penultiem layer ... |
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269 | DO ji = kideb, kiut |
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270 | snicind(ji) = 0 |
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271 | zdeltah(ji) = 0.0 |
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272 | ENDDO |
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273 | DO jk = nlays0, 1, -1 |
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274 | DO ji = kideb, kiut |
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275 | snicind(ji) = (nlays0+1-jk) & |
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276 | * INT(MAX(0.0,SIGN(1.0,dh_snowice(ji)-zdeltah(ji)-zeps))) & |
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277 | + snicind(ji) & |
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278 | * (1 - INT(MAX(0.0,SIGN(1.0,dh_snowice(ji)-zdeltah(ji)-zeps)))) |
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279 | zdeltah(ji) = zdeltah(ji) + zh_s(ji) |
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280 | END DO |
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281 | ENDDO |
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282 | |
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283 | ! snicswi(ji) : switch which equals |
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284 | ! 1 if snow-ice forms |
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285 | ! 0 if not |
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286 | DO ji = kideb, kiut |
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287 | snicswi(ji) = MAX(0,INT(dh_snowice(ji)/MAX(zeps,ABS(dh_snowice(ji))))) |
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288 | ENDDO |
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289 | |
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290 | ! |
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291 | !------------------------------------------------------------------------------| |
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292 | ! 3) Snow redistribution | |
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293 | !------------------------------------------------------------------------------| |
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294 | ! |
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295 | !------------- |
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296 | ! Old profile |
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297 | !------------- |
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298 | |
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299 | ! by 'old', it is meant that layers coming from accretion are included, |
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300 | ! and that interfacial layers which were partly melted are reduced |
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301 | |
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302 | ! indexes of the vectors |
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303 | !------------------------ |
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304 | ntop0 = 1 |
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305 | maxnbot0 = 0 |
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306 | |
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307 | DO ji = kideb, kiut |
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308 | nbot0(ji) = nlays0 + 1 - snind(ji) + ( 1. - snicind(ji) ) * & |
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309 | snicswi(ji) |
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310 | ! cotes of the top of the layers |
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311 | zm0(ji,0) = 0.0 |
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312 | maxnbot0 = MAX ( maxnbot0 , nbot0(ji) ) |
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313 | ENDDO |
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314 | IF( lk_mpp ) CALL mpp_max( maxnbot0, kcom=ncomm_ice ) |
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315 | |
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316 | DO jk = 1, maxnbot0 |
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317 | DO ji = kideb, kiut |
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318 | !change |
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319 | limsum = ( 1 - snswi(ji) ) * ( jk - 1 ) + & |
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320 | snswi(ji) * ( jk + snind(ji) - 1 ) |
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321 | limsum = MIN( limsum , nlay_s ) |
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322 | zm0(ji,jk) = dh_s_tot(ji) + zh_s(ji) * limsum |
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323 | END DO |
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324 | ENDDO |
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325 | |
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326 | DO ji = kideb, kiut |
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327 | zm0(ji,nbot0(ji)) = dh_s_tot(ji) - snicswi(ji) * dh_snowice(ji) + & |
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328 | zh_s(ji) * nlays0 |
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329 | zm0(ji,1) = dh_s_tot(ji) * (1 -snswi(ji) ) + & |
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330 | snswi(ji) * zm0(ji,1) |
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331 | ENDDO |
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332 | |
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333 | DO jk = ntop0, maxnbot0 |
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334 | DO ji = kideb, kiut |
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335 | ! layer thickness |
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336 | zthick0(ji,jk) = zm0(ji,jk) - zm0(ji,jk-1) |
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337 | END DO |
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338 | ENDDO |
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339 | |
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340 | zqts_in(:) = 0.0 |
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341 | |
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342 | DO ji = kideb, kiut |
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343 | ! layer heat content |
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344 | qm0(ji,1) = rhosn * ( cpic * ( rtt - ( 1. - snswi(ji) ) * ( tatm_ice_1d(ji) ) & |
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345 | - snswi(ji) * t_s_b(ji,1) ) & |
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346 | + lfus ) * zthick0(ji,1) |
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347 | zqts_in(ji) = zqts_in(ji) + qm0(ji,1) |
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348 | ENDDO |
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349 | |
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350 | DO jk = 2, maxnbot0 |
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351 | DO ji = kideb, kiut |
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352 | limsum = ( 1 - snswi(ji) ) * ( jk - 1 ) + & |
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353 | snswi(ji) * ( jk + snind(ji) - 1 ) |
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354 | limsum = MIN( limsum , nlay_s ) |
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355 | qm0(ji,jk) = rhosn * ( cpic * ( rtt - t_s_b(ji,limsum) ) + lfus ) & |
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356 | * zthick0(ji,jk) |
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357 | zswitch = 1.0 - MAX (0.0, SIGN ( 1.0, zeps - ht_s_b(ji) ) ) |
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358 | zqts_in(ji) = zqts_in(ji) + ( 1. - snswi(ji) ) * qm0(ji,jk) * zswitch |
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359 | END DO ! jk |
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360 | ENDDO ! ji |
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361 | |
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362 | !------------------------------------------------ |
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363 | ! Energy given by the snow in snow-ice formation |
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364 | !------------------------------------------------ |
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365 | ! zqsnow, enthalpy of the flooded snow |
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366 | DO ji = kideb, kiut |
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367 | zqsnow(ji) = rhosn*lfus |
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368 | zdeltah(ji) = 0.0 |
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369 | ENDDO |
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370 | |
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371 | DO jk = nlays0, 1, -1 |
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372 | DO ji = kideb, kiut |
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373 | zhsnow = MAX(0.0,dh_snowice(ji)-zdeltah(ji)) |
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374 | zqsnow(ji) = zqsnow(ji) + & |
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375 | rhosn*cpic*(rtt-t_s_b(ji,jk)) |
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376 | zdeltah(ji) = zdeltah(ji) + zh_s(ji) |
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377 | END DO |
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378 | ENDDO |
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379 | |
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380 | DO ji = kideb, kiut |
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381 | zqsnow(ji) = zqsnow(ji) * dh_snowice(ji) |
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382 | END DO |
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383 | |
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384 | !------------------ |
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385 | ! new snow profile |
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386 | !------------------ |
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387 | |
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388 | !-------------- |
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389 | ! Vector index |
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390 | !-------------- |
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391 | ntop1 = 1 |
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392 | nbot1 = nlay_s |
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393 | |
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394 | !------------------- |
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395 | ! Layer coordinates |
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396 | !------------------- |
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397 | DO ji = kideb, kiut |
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398 | zh_s(ji) = ht_s_b(ji) / nlay_s |
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399 | z_s(ji,0) = 0.0 |
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400 | ENDDO |
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401 | |
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402 | DO jk = 1, nlay_s |
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403 | DO ji = kideb, kiut |
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404 | z_s(ji,jk) = zh_s(ji) * jk |
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405 | END DO |
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406 | ENDDO |
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407 | |
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408 | !----------------- |
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409 | ! Layer thickness |
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410 | !----------------- |
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411 | DO layer0 = ntop0, maxnbot0 |
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412 | DO ji = kideb, kiut |
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413 | zhl0(ji,layer0) = zm0(ji,layer0) - zm0(ji,layer0-1) |
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414 | END DO |
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415 | ENDDO |
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416 | |
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417 | DO layer1 = ntop1, nbot1 |
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418 | DO ji = kideb, kiut |
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419 | q_s_b(ji,layer1)= 0.0 |
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420 | END DO |
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421 | ENDDO |
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422 | |
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423 | !---------------- |
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424 | ! Weight factors |
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425 | !---------------- |
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426 | DO layer0 = ntop0, maxnbot0 |
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427 | DO layer1 = ntop1, nbot1 |
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428 | DO ji = kideb, kiut |
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429 | zrl01(layer1,layer0) = MAX(0.0,( MIN(zm0(ji,layer0),z_s(ji,layer1)) & |
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430 | - MAX(zm0(ji,layer0-1), z_s(ji,layer1-1)))/MAX(zhl0(ji,layer0),epsi10)) |
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431 | q_s_b(ji,layer1) = q_s_b(ji,layer1) + zrl01(layer1,layer0)*qm0(ji,layer0) & |
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432 | * MAX(0.0,SIGN(1.0,nbot0(ji)-layer0+zeps)) |
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433 | END DO |
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434 | END DO |
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435 | ENDDO |
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436 | |
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437 | ! Heat conservation |
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438 | zqts_fin(:) = 0.0 |
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439 | DO jk = 1, nlay_s |
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440 | DO ji = kideb, kiut |
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441 | zqts_fin(ji) = zqts_fin(ji) + q_s_b(ji,jk) |
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442 | END DO |
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443 | END DO |
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444 | |
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445 | IF ( con_i ) THEN |
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446 | DO ji = kideb, kiut |
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447 | IF ( ABS ( zqts_in(ji) - zqts_fin(ji) ) / rdt_ice .GT. 1.0e-6 ) THEN |
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448 | zji = MOD( npb(ji) - 1, jpi ) + 1 |
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449 | zjj = ( npb(ji) - 1 ) / jpi + 1 |
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450 | WRITE(numout,*) ' violation of heat conservation : ', & |
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451 | ABS ( zqts_in(ji) - zqts_fin(ji) ) / rdt_ice |
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452 | WRITE(numout,*) ' ji, jj : ', zji, zjj |
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453 | WRITE(numout,*) ' ht_s_b : ', ht_s_b(ji) |
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454 | WRITE(numout,*) ' zqts_in : ', zqts_in(ji) / rdt_ice |
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455 | WRITE(numout,*) ' zqts_fin : ', zqts_fin(ji) / rdt_ice |
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456 | WRITE(numout,*) ' dh_snowice : ', dh_snowice(ji) |
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457 | WRITE(numout,*) ' dh_s_tot : ', dh_s_tot(ji) |
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458 | WRITE(numout,*) ' snswi : ', snswi(ji) |
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459 | ENDIF |
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460 | END DO |
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461 | ENDIF |
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462 | |
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463 | !--------------------- |
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464 | ! Recover heat content |
---|
465 | !--------------------- |
---|
466 | DO jk = 1, nlay_i |
---|
467 | DO ji = kideb, kiut |
---|
468 | q_s_b(ji,jk) = q_s_b(ji,jk) / MAX( zh_s(ji) , zeps ) |
---|
469 | END DO !ji |
---|
470 | ENDDO !jk |
---|
471 | |
---|
472 | !--------------------- |
---|
473 | ! Recover temperature |
---|
474 | !--------------------- |
---|
475 | zfac1 = 1. / ( rhosn * cpic ) |
---|
476 | zfac2 = lfus / cpic |
---|
477 | DO jk = 1, nlay_s |
---|
478 | DO ji = kideb, kiut |
---|
479 | zswitch = MAX ( 0.0 , SIGN ( 1.0, zeps - ht_s_b(ji) ) ) |
---|
480 | t_s_b(ji,jk) = rtt & |
---|
481 | + ( 1.0 - zswitch ) * & |
---|
482 | ( - zfac1 * q_s_b(ji,jk) + zfac2 ) |
---|
483 | END DO |
---|
484 | ENDDO |
---|
485 | ! |
---|
486 | !------------------------------------------------------------------------------| |
---|
487 | ! 4) Ice redistribution | |
---|
488 | !------------------------------------------------------------------------------| |
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489 | ! |
---|
490 | !------------- |
---|
491 | ! OLD PROFILE |
---|
492 | !------------- |
---|
493 | |
---|
494 | !---------------- |
---|
495 | ! Vector indexes |
---|
496 | !---------------- |
---|
497 | ntop0 = 1 |
---|
498 | maxnbot0 = 0 |
---|
499 | |
---|
500 | DO ji = kideb, kiut |
---|
501 | ! reference number of the bottommost layer |
---|
502 | nbot0(ji) = MAX( 1 , MIN( nlayi0 + ( 1 - icboind(ji) ) + & |
---|
503 | ( 1 - icsuind(ji) ) * icsuswi(ji) + snicswi(ji) , & |
---|
504 | nlay_i + 2 ) ) |
---|
505 | ! maximum reference number of the bottommost layer over all domain |
---|
506 | maxnbot0 = MAX( maxnbot0 , nbot0(ji) ) |
---|
507 | ENDDO |
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508 | |
---|
509 | !------------------------- |
---|
510 | ! Cotes of old ice layers |
---|
511 | !------------------------- |
---|
512 | zm0(:,0) = 0.0 |
---|
513 | |
---|
514 | DO jk = 1, maxnbot0 |
---|
515 | DO ji = kideb, kiut |
---|
516 | ! jk goes from 1 to nbot0 |
---|
517 | ! the ice layer number goes from 1 to nlay_i |
---|
518 | ! limsum is the real ice layer number corresponding to present jk |
---|
519 | limsum = ( (icsuswi(ji)*(icsuind(ji)+jk-1) + & |
---|
520 | (1-icsuswi(ji))*jk))*(1-snicswi(ji)) + (jk-1)*snicswi(ji) |
---|
521 | zm0(ji,jk)= icsuswi(ji)*dh_i_surf(ji) + snicswi(ji)*dh_snowice(ji) & |
---|
522 | + limsum * zh_i(ji) |
---|
523 | END DO |
---|
524 | ENDDO |
---|
525 | |
---|
526 | DO ji = kideb, kiut |
---|
527 | zm0(ji,nbot0(ji)) = icsuswi(ji)*dh_i_surf(ji) + snicswi(ji)*dh_snowice(ji) + dh_i_bott(ji) & |
---|
528 | + zh_i(ji) * nlayi0 |
---|
529 | zm0(ji,1) = snicswi(ji)*dh_snowice(ji) + (1-snicswi(ji))*zm0(ji,1) |
---|
530 | ENDDO |
---|
531 | |
---|
532 | !----------------------------- |
---|
533 | ! Thickness of old ice layers |
---|
534 | !----------------------------- |
---|
535 | DO jk = ntop0, maxnbot0 |
---|
536 | DO ji = kideb, kiut |
---|
537 | zthick0(ji,jk) = zm0(ji,jk) - zm0(ji,jk-1) |
---|
538 | END DO |
---|
539 | ENDDO |
---|
540 | |
---|
541 | !--------------------------- |
---|
542 | ! Inner layers heat content |
---|
543 | !--------------------------- |
---|
544 | qm0(:,:) = 0.0 |
---|
545 | zqti_in(:) = 0.0 |
---|
546 | |
---|
547 | DO jk = ntop0, maxnbot0 |
---|
548 | DO ji = kideb, kiut |
---|
549 | limsum = MAX(1,MIN(snicswi(ji)*(jk-1) + icsuswi(ji)*(jk-1+icsuind(ji)) + & |
---|
550 | (1-icsuswi(ji))*(1-snicswi(ji))*jk,nlay_i)) |
---|
551 | ztmelts = -tmut * s_i_b(ji,limsum) + rtt |
---|
552 | qm0(ji,jk) = rhoic * ( cpic * (ztmelts-t_i_b(ji,limsum)) + lfus * ( 1.0-(ztmelts-rtt)/ & |
---|
553 | MIN((t_i_b(ji,limsum)-rtt),-zeps) ) - rcp*(ztmelts-rtt) ) & |
---|
554 | * zthick0(ji,jk) |
---|
555 | END DO |
---|
556 | ENDDO |
---|
557 | |
---|
558 | !---------------------------- |
---|
559 | ! Bottom layers heat content |
---|
560 | !---------------------------- |
---|
561 | DO ji = kideb, kiut |
---|
562 | ztmelts = ( 1.0 - icboswi(ji) ) * (-tmut * s_i_b(ji,nlayi0)) & ! case of melting ice |
---|
563 | + icboswi(ji) * (-tmut * s_i_new(ji)) & ! case of forming ice |
---|
564 | + rtt ! this temperature is in Celsius |
---|
565 | |
---|
566 | ! bottom formation temperature |
---|
567 | ztform = t_i_b(ji,nlay_i) |
---|
568 | IF ( ( num_sal .EQ. 2 ) .OR. ( num_sal .EQ. 4 ) ) ztform = t_bo_b(ji) |
---|
569 | qm0(ji,nbot0(ji)) = ( 1.0 - icboswi(ji) )*qm0(ji,nbot0(ji)) & ! case of melting ice |
---|
570 | + icboswi(ji) * & ! case of forming ice |
---|
571 | rhoic*( cpic*(ztmelts-ztform) & |
---|
572 | + lfus *( 1.0-(ztmelts-rtt)/ & |
---|
573 | MIN ( (ztform-rtt) , - epsi10 ) ) & |
---|
574 | - rcp*(ztmelts-rtt) ) & |
---|
575 | *zthick0(ji,nbot0(ji)) |
---|
576 | ENDDO |
---|
577 | |
---|
578 | !----------------------------- |
---|
579 | ! Snow ice layer heat content |
---|
580 | !----------------------------- |
---|
581 | DO ji = kideb, kiut |
---|
582 | ! energy of the flooding seawater |
---|
583 | zqsnic = rau0 * rcp * ( rtt - t_bo_b(ji) ) * dh_snowice(ji) * & |
---|
584 | (rhoic - rhosn) / rhoic * snicswi(ji) ! generally positive |
---|
585 | ! Heat conservation diagnostic |
---|
586 | qt_i_in(ji,jl) = qt_i_in(ji,jl) + zqsnic |
---|
587 | |
---|
588 | qldif_1d(ji) = qldif_1d(ji) + zqsnic * a_i_b(ji) |
---|
589 | |
---|
590 | ! enthalpy of the newly formed snow-ice layer |
---|
591 | ! = enthalpy of snow + enthalpy of frozen water |
---|
592 | zqsnic = zqsnow(ji) + zqsnic |
---|
593 | qm0(ji,1) = snicswi(ji) * zqsnic + ( 1 - snicswi(ji) ) * qm0(ji,1) |
---|
594 | |
---|
595 | ENDDO ! ji |
---|
596 | |
---|
597 | DO jk = ntop0, maxnbot0 |
---|
598 | DO ji = kideb, kiut |
---|
599 | ! Heat conservation |
---|
600 | zqti_in(ji) = zqti_in(ji) + qm0(ji,jk) & |
---|
601 | * MAX( 0.0 , SIGN(1.0,ht_i_b(ji)-zeps6+zeps) ) & |
---|
602 | * MAX( 0.0 , SIGN( 1. , nbot0(ji) - jk + zeps ) ) |
---|
603 | END DO |
---|
604 | ENDDO |
---|
605 | |
---|
606 | !------------- |
---|
607 | ! NEW PROFILE |
---|
608 | !------------- |
---|
609 | |
---|
610 | !--------------- |
---|
611 | ! Vectors index |
---|
612 | !--------------- |
---|
613 | |
---|
614 | ntop1 = 1 |
---|
615 | nbot1 = nlay_i |
---|
616 | |
---|
617 | !------------------ |
---|
618 | ! Layers thickness |
---|
619 | !------------------ |
---|
620 | DO ji = kideb, kiut |
---|
621 | zh_i(ji) = ht_i_b(ji) / nlay_i |
---|
622 | ENDDO |
---|
623 | |
---|
624 | !------------- |
---|
625 | ! Layer cotes |
---|
626 | !------------- |
---|
627 | z_i(:,0) = 0.0 |
---|
628 | DO jk = 1, nlay_i |
---|
629 | DO ji = kideb, kiut |
---|
630 | z_i(ji,jk) = zh_i(ji) * jk |
---|
631 | END DO |
---|
632 | ENDDO |
---|
633 | |
---|
634 | !--thicknesses of the layers |
---|
635 | DO layer0 = ntop0, maxnbot0 |
---|
636 | DO ji = kideb, kiut |
---|
637 | zhl0(ji,layer0) = zm0(ji,layer0) - zm0(ji,layer0-1) !thicknesses of the layers |
---|
638 | END DO |
---|
639 | ENDDO |
---|
640 | |
---|
641 | !------------------------ |
---|
642 | ! Weights for relayering |
---|
643 | !------------------------ |
---|
644 | |
---|
645 | q_i_b(:,:) = 0.0 |
---|
646 | DO layer0 = ntop0, maxnbot0 |
---|
647 | DO layer1 = ntop1, nbot1 |
---|
648 | DO ji = kideb, kiut |
---|
649 | zrl01(layer1,layer0) = MAX(0.0,( MIN(zm0(ji,layer0),z_i(ji,layer1)) & |
---|
650 | - MAX(zm0(ji,layer0-1), z_i(ji,layer1-1)))/MAX(zhl0(ji,layer0),epsi10)) |
---|
651 | q_i_b(ji,layer1) = q_i_b(ji,layer1) & |
---|
652 | + zrl01(layer1,layer0)*qm0(ji,layer0) & |
---|
653 | * MAX(0.0,SIGN(1.0,ht_i_b(ji)-zeps6+zeps)) & |
---|
654 | * MAX(0.0,SIGN(1.0,nbot0(ji)-layer0+zeps)) |
---|
655 | END DO |
---|
656 | END DO |
---|
657 | ENDDO |
---|
658 | |
---|
659 | !------------------------- |
---|
660 | ! Heat conservation check |
---|
661 | !------------------------- |
---|
662 | zqti_fin(:) = 0.0 |
---|
663 | DO jk = 1, nlay_i |
---|
664 | DO ji = kideb, kiut |
---|
665 | zqti_fin(ji) = zqti_fin(ji) + q_i_b(ji,jk) |
---|
666 | END DO |
---|
667 | END DO |
---|
668 | ! |
---|
669 | DO ji = kideb, kiut |
---|
670 | IF ( ABS ( zqti_in(ji) - zqti_fin(ji) ) / rdt_ice .GT. 1.0e-6 ) THEN |
---|
671 | zji = MOD( npb(ji) - 1, jpi ) + 1 |
---|
672 | zjj = ( npb(ji) - 1 ) / jpi + 1 |
---|
673 | WRITE(numout,*) ' violation of heat conservation : ', & |
---|
674 | ABS ( zqti_in(ji) - zqti_fin(ji) ) / rdt_ice |
---|
675 | WRITE(numout,*) ' ji, jj : ', zji, zjj |
---|
676 | WRITE(numout,*) ' ht_i_b : ', ht_i_b(ji) |
---|
677 | WRITE(numout,*) ' zqti_in : ', zqti_in(ji) / rdt_ice |
---|
678 | WRITE(numout,*) ' zqti_fin : ', zqti_fin(ji) / rdt_ice |
---|
679 | WRITE(numout,*) ' dh_i_bott: ', dh_i_bott(ji) |
---|
680 | WRITE(numout,*) ' dh_i_surf: ', dh_i_surf(ji) |
---|
681 | WRITE(numout,*) ' dh_snowice:', dh_snowice(ji) |
---|
682 | WRITE(numout,*) ' icsuswi : ', icsuswi(ji) |
---|
683 | WRITE(numout,*) ' icboswi : ', icboswi(ji) |
---|
684 | WRITE(numout,*) ' snicswi : ', snicswi(ji) |
---|
685 | ENDIF |
---|
686 | END DO |
---|
687 | |
---|
688 | !---------------------- |
---|
689 | ! Recover heat content |
---|
690 | !---------------------- |
---|
691 | DO jk = 1, nlay_i |
---|
692 | DO ji = kideb, kiut |
---|
693 | q_i_b(ji,jk) = q_i_b(ji,jk) / MAX( zh_i(ji) , zeps ) |
---|
694 | END DO !ji |
---|
695 | ENDDO !jk |
---|
696 | |
---|
697 | ! Heat conservation |
---|
698 | zqti_fin(:) = 0.0 |
---|
699 | DO jk = 1, nlay_i |
---|
700 | DO ji = kideb, kiut |
---|
701 | zqti_fin(ji) = zqti_fin(ji) + q_i_b(ji,jk) * zh_i(ji) |
---|
702 | END DO |
---|
703 | END DO |
---|
704 | |
---|
705 | ! |
---|
706 | !------------------------------------------------------------------------------| |
---|
707 | ! 5) Update salinity and recover temperature | |
---|
708 | !------------------------------------------------------------------------------| |
---|
709 | ! |
---|
710 | ! Update salinity (basal entrapment, snow ice formation) |
---|
711 | DO ji = kideb, kiut |
---|
712 | sm_i_b(ji) = sm_i_b(ji) & |
---|
713 | + dsm_i_se_1d(ji) + dsm_i_si_1d(ji) |
---|
714 | END DO !ji |
---|
715 | |
---|
716 | ! Recover temperature |
---|
717 | DO jk = 1, nlay_i |
---|
718 | |
---|
719 | DO ji = kideb, kiut |
---|
720 | |
---|
721 | ztmelts = -tmut*s_i_b(ji,jk) + rtt |
---|
722 | !Conversion q(S,T) -> T (second order equation) |
---|
723 | zaaa = cpic |
---|
724 | zbbb = ( rcp - cpic ) * ( ztmelts - rtt ) + & |
---|
725 | q_i_b(ji,jk) / rhoic - lfus |
---|
726 | zccc = lfus * ( ztmelts - rtt ) |
---|
727 | zdiscrim = SQRT( MAX(zbbb*zbbb - 4.0*zaaa*zccc,0.0) ) |
---|
728 | t_i_b(ji,jk) = rtt - ( zbbb + zdiscrim ) / & |
---|
729 | ( 2.0 *zaaa ) |
---|
730 | END DO !ji |
---|
731 | |
---|
732 | END DO !jk |
---|
733 | |
---|
734 | END SUBROUTINE lim_thd_ent |
---|
735 | |
---|
736 | #else |
---|
737 | !!====================================================================== |
---|
738 | !! *** MODULE limthd_ent *** |
---|
739 | !! no sea ice model |
---|
740 | !!====================================================================== |
---|
741 | CONTAINS |
---|
742 | SUBROUTINE lim_thd_ent ! Empty routine |
---|
743 | END SUBROUTINE lim_thd_ent |
---|
744 | #endif |
---|
745 | END MODULE limthd_ent |
---|