1 | SUBROUTINE ice_gas(nlay_i,kideb,kiut) |
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2 | |
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3 | ! |
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4 | !-----------------------------------------------------------------------------! |
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5 | ! *** ice_gas *** |
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6 | ! |
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7 | ! Nov 2015 |
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8 | ! |
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9 | ! Version : source_3.10 |
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10 | ! |
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11 | ! to do |
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12 | ! - put the computation of solubilities in a subroutine |
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13 | ! - check conservation |
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14 | ! - brine characteristics to subroutinize |
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15 | ! - missing carbonate chemistry in the end |
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16 | !-----------------------------------------------------------------------------! |
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17 | |
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18 | USE lib_fortran |
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19 | |
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20 | INCLUDE 'type.com' |
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21 | INCLUDE 'para.com' |
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22 | INCLUDE 'const.com' |
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23 | INCLUDE 'ice.com' |
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24 | INCLUDE 'thermo.com' |
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25 | INCLUDE 'bio.com' |
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26 | |
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27 | REAL(8) :: |
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28 | & zsat, |
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29 | & zsat_diff |
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30 | |
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31 | LOGICAL :: |
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32 | & ln_write_gas = .TRUE. |
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33 | |
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34 | !==============================================================================! |
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35 | |
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36 | IF ( ln_write_gas ) THEN |
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37 | |
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38 | WRITE(numout,*) |
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39 | WRITE(numout,*) ' ** ice_gas : ' |
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40 | WRITE(numout,*) ' ~~~~~~~~~~~~ ' |
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41 | |
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42 | ENDIF |
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43 | |
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44 | ! |
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45 | !------------------------------------------------------------------------------! |
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46 | ! 1) Initialize conservation test and gas concentrations |
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47 | !------------------------------------------------------------------------------! |
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48 | ! |
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49 | |
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50 | !--- Gas concentrations |
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51 | DO jn = 1, ntra_bio |
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52 | |
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53 | ! Brine concentrations |
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54 | IF ( ( flag_active(jn) ) .AND. |
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55 | & ( biotr_i_typ(jn) .EQ. 'gas' ) ) THEN |
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56 | DO layer = 1, nlay_bio |
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57 | c_i_bio(jn,layer) = cbu_i_bio(jn,layer) / e_i_bio(layer) |
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58 | END DO |
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59 | ENDIF |
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60 | |
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61 | ! Carbonate chemistry |
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62 | IF ( ln_carbon ) CALL ice_carb_chem |
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63 | |
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64 | IF ( ( flag_active(jn) ) .AND. |
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65 | & ( biotr_i_typ(jn) .EQ. 'gas' ) ) THEN |
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66 | DO layer = 1, nlay_bio |
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67 | c_gtot_i(jn,layer) = cbu_i_bio(jn,layer) + |
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68 | & cbub_i_bio(jn,layer) |
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69 | END DO |
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70 | |
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71 | ENDIF |
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72 | |
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73 | END DO |
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74 | |
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75 | !--- Conservation test |
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76 | CALL ice_gas_column( ntra_bio , c_gtot_i, deltaz_i_bio, .TRUE., |
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77 | & mt_i_gas_init ) |
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78 | |
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79 | DO jn = 1, ntra_bio |
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80 | |
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81 | IF ( ( flag_active(jn) ) .AND. |
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82 | & ( biotr_i_typ(jn) .EQ. 'gas' ) .AND. |
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83 | & ln_write_gas ) THEN |
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84 | |
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85 | WRITE(numout,*) |
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86 | WRITE(numout,*) ' *** Initial values *** ' |
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87 | WRITE(numout,*) ' --- time step --- : ', numit |
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88 | |
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89 | WRITE(numout,*) ' --- Tracer --- : ', biotr_i_nam(jn) |
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90 | WRITE(numout,*) 'c_i_bio : ',c_i_bio(jn,layer_00:nlay_bio) |
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91 | WRITE(numout,*) 'cbu_i_bio: ',cbu_i_bio(jn,layer_00:nlay_bio) |
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92 | WRITE(numout,*) 'cbub_i_bio: ', |
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93 | & cbub_i_bio(jn,layer_00:nlay_bio) |
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94 | WRITE(numout,*) 'c_gtot_i : ',c_gtot_i(jn,layer_00:nlay_bio) |
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95 | WRITE(numout,*) |
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96 | WRITE(numout,*) ' mt_i_gas_init : ', mt_i_gas_init(jn) |
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97 | |
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98 | ENDIF |
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99 | |
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100 | END DO |
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101 | |
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102 | ! |
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103 | !------------------------------------------------------------------------------! |
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104 | ! 2) Bubble formation and dissolution |
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105 | !------------------------------------------------------------------------------! |
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106 | ! |
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107 | |
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108 | !--------------------------- |
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109 | CALL ice_gas_solu ! Saturation concentrations |
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110 | !--------------------------- |
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111 | |
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112 | IF ( ln_bubform ) THEN |
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113 | |
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114 | IF ( ln_write_gas ) THEN |
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115 | WRITE(numout,*) |
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116 | WRITE(numout,*) ' *** Bubble formation and dissolution *** ' |
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117 | WRITE(numout,*) |
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118 | ENDIF |
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119 | |
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120 | DO jn = 1, ntra_bio |
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121 | |
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122 | IF ( flag_active(jn) .AND. |
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123 | & ( biotr_i_typ(jn) .EQ. 'gas' ) ) THEN |
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124 | |
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125 | IF ( ln_write_gas ) THEN |
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126 | WRITE(numout,*) ' Tracer number : ', jn |
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127 | WRITE(numout,*) ' --- ', biotr_i_nam(jn) |
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128 | ENDIF |
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129 | |
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130 | DO layer = 1, nlay_bio |
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131 | |
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132 | zsat = csat_gas(jn,layer) * sursat_gas |
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133 | zsat_diff = zsat - c_i_bio(jn,layer) ! undersaturation |
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134 | |
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135 | ! bubble formation or dissolution rate |
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136 | IF ( zsat_diff .LE. 0 ) THEN ! sursaturation |
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137 | zbub_rate = bub_form_rate |
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138 | ELSE |
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139 | zbub_rate = bub_diss_rate |
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140 | ENDIF |
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141 | |
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142 | ! change in bulk bubble concentration |
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143 | zd_cbri = zsat_diff * zbub_rate * ddtb |
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144 | zd_cbri = MAX( -c_i_bio(jn,layer), zd_cbri ) ! cannot exhaust brines |
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145 | zd_cbri = MIN( cbub_i_bio(jn,layer)/e_i_bio(layer), ! cannot exhaust gas bubbles |
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146 | & zd_cbri ) |
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147 | c_i_bio(jn,layer) = c_i_bio(jn,layer) + zd_cbri |
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148 | |
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149 | ! change in bulk bubble concentration |
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150 | zd_cbub = - zd_cbri*e_i_bio(layer) |
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151 | cbub_i_bio(jn,layer) = cbub_i_bio(jn,layer) + zd_cbub |
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152 | |
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153 | ! Update bulk concentration |
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154 | cbu_i_bio(jn,layer) =e_i_bio(layer)*c_i_bio(jn,layer) |
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155 | |
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156 | ! Diagnostic % saturation ratio |
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157 | pc_sat(jn,layer) = c_i_bio(jn,layer) / |
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158 | & csat_gas(jn,layer) * 100. |
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159 | |
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160 | ! Update DIC for CO2 |
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161 | IF ( jn .EQ. jn_co2 ) |
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162 | & cbu_i_bio(jn_dic,layer) = |
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163 | & cbu_i_bio(jn_dic,layer) - zd_cbub |
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164 | |
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165 | END DO ! layer |
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166 | |
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167 | ENDIF ! flags, biotr_i_typ |
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168 | |
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169 | END DO ! ntra_bio |
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170 | ! |
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171 | ENDIF ! ln_bubform |
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172 | |
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173 | ! |
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174 | !------------------------------------------------------------------------------! |
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175 | ! 3) Bubble rise |
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176 | !------------------------------------------------------------------------------! |
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177 | ! |
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178 | IF ( ln_bubrise ) THEN |
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179 | |
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180 | IF ( ln_write_gas ) THEN |
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181 | WRITE(numout,*) |
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182 | WRITE(numout,*) ' *** Bubble rise *** ' |
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183 | ENDIF |
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184 | |
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185 | f_bub(:) = 0. |
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186 | |
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187 | IF ( ln_write_gas ) WRITE(numout,*) ' *** immediate rise' |
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188 | |
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189 | DO jn = 1, ntra_bio |
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190 | |
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191 | IF ( flag_active(jn) .AND. |
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192 | & ( biotr_i_typ(jn) .EQ. 'gas' ) ) THEN |
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193 | |
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194 | IF ( ln_write_gas ) THEN |
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195 | WRITE(numout,*) ' Tracer number : ', jn |
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196 | WRITE(numout,*) ' --- ', biotr_i_nam(jn) |
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197 | ENDIF |
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198 | |
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199 | DO layer = nlay_bio, 1, -1 |
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200 | |
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201 | zswitch = 0. ! by default, bubbles rise |
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202 | |
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203 | ! i_imper_layer: identifies the first impermeable layer above "layer" |
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204 | ! if no such layer, then i_imper_layer = 0 and gas get out of the ice |
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205 | ! via f_bub |
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206 | |
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207 | i_imper_layer = 0 |
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208 | |
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209 | IF ( e_i_bio(layer) .LE. e_thr_bubrise ) THEN |
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210 | i_imper_layer = layer |
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211 | ELSE |
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212 | DO layer_2 = layer - 1, 1, -1 ! find a layer above |
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213 | IF ( ( zswitch .LE. 0 ) .AND. |
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214 | & ( e_i_bio(layer_2) .LT. e_thr_bubrise ) ) THEN |
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215 | zswitch = 1. |
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216 | i_imper_layer = MAX(i_imper_layer, layer_2) |
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217 | ENDIF ! e_i_bio |
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218 | END DO ! layer2 |
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219 | ENDIF |
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220 | |
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221 | ! Transfer gas among layers |
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222 | IF ( ( i_imper_layer .GT. 0 ) .AND. |
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223 | & ( i_imper_layer .NE. layer ) ) THEN ! in-ice bubble transfer |
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224 | cbub_i_bio(jn,i_imper_layer) = ! add gas in the impermeable layer |
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225 | & cbub_i_bio(jn,i_imper_layer)+cbub_i_bio(jn,layer) |
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226 | cbub_i_bio(jn,layer) = 0. ! remove gas from the permeable layer |
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227 | ENDIF |
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228 | |
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229 | IF ( i_imper_layer .EQ. 0 ) THEN ! ice-atmosphere bubble transfer |
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230 | f_bub(jn) = f_bub(jn) + cbub_i_bio(jn,layer) * |
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231 | & deltaz_i_bio(layer) / ddtb |
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232 | cbub_i_bio(jn,layer) = 0. ! remove gas from the permeable layer |
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233 | ENDIF ! i_imper_layer |
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234 | |
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235 | END DO |
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236 | |
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237 | ENDIF ! flag_active, biotr_i_typ |
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238 | |
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239 | END DO ! jn |
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240 | |
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241 | ENDIF ! ln_bubrise |
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242 | |
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243 | ! |
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244 | !------------------------------------------------------------------------------! |
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245 | ! 4) Update total gas concentration |
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246 | !------------------------------------------------------------------------------! |
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247 | ! |
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248 | |
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249 | DO jn = 1, ntra_bio |
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250 | |
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251 | IF ( ( flag_active(jn) ) .AND. |
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252 | & ( biotr_i_typ(jn) .EQ. 'gas' ) .AND. |
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253 | & ln_write_gas ) THEN |
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254 | |
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255 | DO layer = 1, nlay_bio ! dégazage des couches 2 à nlay_bio |
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256 | c_gtot_i(jn,layer) = cbu_i_bio(jn,layer) + |
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257 | & cbub_i_bio(jn,layer) |
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258 | END DO |
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259 | |
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260 | WRITE(numout,*) ' *** After ice_gas *** ' |
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261 | |
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262 | WRITE(numout,*) ' Tracer : ', biotr_i_nam(jn) |
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263 | WRITE(numout,*) ' c_i_bio : ', ( c_i_bio(jn,layer), ! concentration of tracers in brines (mmol m-3) |
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264 | & layer = 1, nlay_bio ) |
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265 | WRITE(numout,*) ' cbu_i_bio: ', ( cbu_i_bio(jn,layer), ! concentration of tracers in bulk ice |
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266 | & layer = 1, nlay_bio ) |
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267 | WRITE(numout,*) ' cbub_i_bio : ', ( cbub_i_bio(jn,layer), ! concentration of tracers in bubbles in bulk ice |
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268 | & layer = 1, nlay_bio ) |
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269 | WRITE(numout,*) ' c_gtot_i : ', ( c_gtot_i(jn,layer), ! concentration of tracers in bubbles + bulk ice |
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270 | & layer = 1, nlay_bio ) |
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271 | WRITE(numout,*) |
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272 | |
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273 | ENDIF |
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274 | |
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275 | ENDDO |
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276 | |
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277 | ! |
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278 | !------------------------------------------------------------------------------! |
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279 | ! 4) Conservation test and output |
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280 | !------------------------------------------------------------------------------! |
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281 | ! |
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282 | |
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283 | CALL ice_gas_column( ntra_bio , c_gtot_i, deltaz_i_bio, .TRUE., |
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284 | & mt_i_gas_final ) |
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285 | |
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286 | IF ( ln_write_gas ) THEN |
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287 | DO jn = 1, ntra_bio |
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288 | WRITE(numout,*) ' tracer : ', biotr_i_nam(jn) |
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289 | WRITE(numout,*) ' mt_i_gas_init : ', mt_i_gas_init(jn) |
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290 | WRITE(numout,*) ' mt_i_gas_final : ', mt_i_gas_final(jn) |
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291 | END DO |
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292 | ENDIF |
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293 | |
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294 | DO jn = 1, ntra_bio |
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295 | zfbub = f_bub(jn) * ddtb |
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296 | WRITE(numout,*) ' tracer : ', biotr_i_nam(jn) |
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297 | WRITE(numout,*) ' zfbub : ', zfbub |
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298 | |
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299 | IF ( ABS( mt_i_gas_init(jn) - mt_i_gas_final(jn) - zfbub ) |
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300 | & .GT. 1.0e-10 ) |
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301 | & THEN |
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302 | WRITE(numout,*) |
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303 | WRITE(numout,*) ' ALERT!!! TOTAL GAS NOT CONSERVED ' |
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304 | WRITE(numout,*) ' at time step : ', numit |
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305 | WRITE(numout,*) ' tracer : ', jn |
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306 | WRITE(numout,*) ' mt_i_gas_init : ', mt_i_gas_init(jn) |
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307 | WRITE(numout,*) ' mt_i_gas_final : ', mt_i_gas_final(jn) |
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308 | WRITE(numout,*) ' diff : ', mt_i_gas_init(jn) - |
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309 | & mt_i_gas_final(jn) - zfbub |
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310 | WRITE(numout,*) ' zfbub : ', zfbub |
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311 | WRITE(numout,*) |
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312 | ENDIF |
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313 | ENDDO |
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314 | |
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315 | ! |
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316 | !------------------------------------------------------------------------------! |
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317 | ! x) Update DIC and carbonate chemistry |
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318 | !------------------------------------------------------------------------------! |
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319 | ! |
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320 | IF ( ln_carbon ) CALL ice_carb_chem |
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321 | |
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322 | !------------------------------------------------------------------------------! |
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323 | ! X) End of the routine |
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324 | !------------------------------------------------------------------------------! |
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325 | ! |
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326 | WRITE(numout,*) |
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327 | WRITE(numout,*) ' End of ice_gas ' |
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328 | WRITE(numout,*) '~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' |
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329 | |
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330 | |
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331 | !==============================================================================| |
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332 | ! Fin de la routine ice_gas |
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333 | WRITE(numout,*) |
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334 | |
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335 | END |
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