1 | MODULE p4zopt |
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2 | !!====================================================================== |
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3 | !! *** MODULE p4zopt *** |
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4 | !! TOP : PISCES Compute the light availability in the water column |
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5 | !!====================================================================== |
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6 | !! History : 1.0 ! 2004 (O. Aumont) Original code |
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7 | !! 2.0 ! 2007-12 (C. Ethe, G. Madec) F90 |
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8 | !!---------------------------------------------------------------------- |
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9 | #if defined key_pisces |
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10 | !!---------------------------------------------------------------------- |
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11 | !! 'key_pisces' PISCES bio-model |
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12 | !!---------------------------------------------------------------------- |
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13 | !! p4z_opt : Compute the light availability in the water column |
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14 | !!---------------------------------------------------------------------- |
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15 | USE oce_trc ! |
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16 | USE trp_trc |
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17 | USE sms |
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18 | |
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19 | IMPLICIT NONE |
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20 | PRIVATE |
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21 | |
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22 | PUBLIC p4z_opt ! called in p4zprg.F90 |
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23 | |
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24 | !!* Substitution |
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25 | # include "domzgr_substitute.h90" |
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26 | !!---------------------------------------------------------------------- |
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27 | !! NEMO/TOP 2.0 , LOCEAN-IPSL (2007) |
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28 | !! $Header:$ |
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29 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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30 | !!---------------------------------------------------------------------- |
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31 | |
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32 | CONTAINS |
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33 | |
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34 | SUBROUTINE p4z_opt |
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35 | !!--------------------------------------------------------------------- |
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36 | !! *** ROUTINE p4z_opt *** |
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37 | !! |
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38 | !! ** Purpose : Compute the light availability in the water column |
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39 | !! depending on the depth and the chlorophyll concentration |
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40 | !! |
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41 | !! ** Method : - ??? |
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42 | !!--------------------------------------------------------------------- |
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43 | INTEGER :: ji, jj, jk |
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44 | INTEGER :: irgb |
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45 | REAL(wp) :: zchl, zparlux |
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46 | REAL(wp) :: zrlight , zblight , zglight |
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47 | REAL(wp) :: zrlight1, zblight1, zglight1 |
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48 | REAL(wp), DIMENSION(jpi,jpj) :: zdepmoy, zetmp |
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49 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zekg, zekr, zekb |
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50 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: ze1 , ze2 , ze3 |
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51 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: ze3lum, ze4lum |
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52 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: ze5lum, ze6lum |
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53 | !!--------------------------------------------------------------------- |
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54 | |
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55 | ! Initialisation of variables used to compute PAR |
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56 | ! ----------------------------------------------- |
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57 | ze1 (:,:,:) = 0.e0 |
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58 | ze2 (:,:,:) = 0.e0 |
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59 | ze3 (:,:,:) = 0.e0 |
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60 | etot(:,:,:) = 0.e0 |
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61 | |
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62 | zparlux = 0.43 / 3. |
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63 | |
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64 | ! IF activated, computation of the qsr for the dynamics |
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65 | ! ----------------------------------------------------- |
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66 | IF( ln_qsr_sms ) THEN |
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67 | ze3lum(:,:,:) = 0.e0 |
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68 | ze4lum(:,:,:) = 0.e0 |
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69 | ze5lum(:,:,:) = 0.e0 |
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70 | ze6lum(:,:,:) = 0.e0 |
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71 | ENDIF |
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72 | |
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73 | DO jk = 1, jpkm1 |
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74 | DO jj = 1, jpj |
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75 | DO ji = 1, jpi |
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76 | |
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77 | ! Separation in three light bands: red, green, blue |
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78 | ! ------------------------------------------------- |
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79 | zchl = ( trn(ji,jj,jk,jpnch) + trn(ji,jj,jk,jpdch) + rtrn ) * 1.e6 |
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80 | zchl = MAX( 0.03, zchl ) |
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81 | zchl = MIN( 10. , zchl ) |
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82 | |
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83 | irgb = INT( 41 + 20.* LOG10( zchl ) + rtrn ) |
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84 | |
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85 | zekb(ji,jj,jk) = xkrgb(1,irgb) |
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86 | zekg(ji,jj,jk) = xkrgb(2,irgb) |
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87 | zekr(ji,jj,jk) = xkrgb(3,irgb) |
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88 | |
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89 | END DO |
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90 | END DO |
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91 | END DO |
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92 | |
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93 | DO jj = 1,jpj |
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94 | DO ji = 1,jpi |
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95 | |
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96 | ! Separation in three light bands: red, green, blue |
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97 | ! ------------------------------------------------- |
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98 | |
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99 | zblight = 0.5 * zekb(ji,jj,1) * fse3t(ji,jj,1) |
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100 | zglight = 0.5 * zekg(ji,jj,1) * fse3t(ji,jj,1) |
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101 | zrlight = 0.5 * zekr(ji,jj,1) * fse3t(ji,jj,1) |
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102 | |
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103 | ze1(ji,jj,1) = zparlux * qsr(ji,jj) * EXP(-zblight) |
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104 | ze2(ji,jj,1) = zparlux * qsr(ji,jj) * EXP(-zglight) |
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105 | ze3(ji,jj,1) = zparlux * qsr(ji,jj) * EXP(-zrlight) |
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106 | |
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107 | END DO |
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108 | END DO |
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109 | |
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110 | DO jk = 2, jpkm1 |
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111 | DO jj = 1, jpj |
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112 | DO ji = 1, jpi |
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113 | |
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114 | ! Separation in three light bands: red, green, blue |
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115 | ! ------------------------------------------------- |
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116 | |
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117 | zblight = 0.5 * ( zekb(ji,jj,jk-1) * fse3t(ji,jj,jk-1) & |
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118 | & + zekb(ji,jj,jk ) * fse3t(ji,jj,jk ) ) |
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119 | zglight = 0.5 * ( zekg(ji,jj,jk-1) * fse3t(ji,jj,jk-1) & |
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120 | & + zekg(ji,jj,jk ) * fse3t(ji,jj,jk ) ) |
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121 | zrlight = 0.5 * ( zekr(ji,jj,jk-1) * fse3t(ji,jj,jk-1) & |
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122 | & + zekr(ji,jj,jk ) * fse3t(ji,jj,jk ) ) |
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123 | |
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124 | ze1(ji,jj,jk) = ze1(ji,jj,jk-1) * EXP(-zblight) |
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125 | ze2(ji,jj,jk) = ze2(ji,jj,jk-1) * EXP(-zglight) |
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126 | ze3(ji,jj,jk) = ze3(ji,jj,jk-1) * EXP(-zrlight) |
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127 | |
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128 | END DO |
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129 | END DO |
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130 | END DO |
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131 | |
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132 | etot(:,:,:) = ze1(:,:,:) + ze2(:,:,:) + ze3(:,:,:) |
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133 | |
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134 | IF( ln_qsr_sms ) THEN |
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135 | |
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136 | ! In the following, the vertical attenuation of qsr for the dynamics is computed |
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137 | ! ------------------------------------------------------------------------------ |
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138 | |
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139 | DO jj = 1, jpj |
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140 | DO ji = 1, jpi |
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141 | |
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142 | ! Separation in three light bands: red, green, blue |
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143 | ! ------------------------------------------------- |
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144 | |
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145 | zblight = 0.5 * zekb(ji,jj,1) * fse3t(ji,jj,1) |
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146 | zglight = 0.5 * zekg(ji,jj,1) * fse3t(ji,jj,1) |
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147 | zrlight = 0.5 * zekr(ji,jj,1) * fse3t(ji,jj,1) |
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148 | |
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149 | ze3lum(ji,jj,1) = zparlux * qsr(ji,jj) |
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150 | ze4lum(ji,jj,1) = zparlux * qsr(ji,jj) |
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151 | ze5lum(ji,jj,1) = zparlux * qsr(ji,jj) |
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152 | ze6lum(ji,jj,1) = (1.-3. * zparlux) * qsr(ji,jj) |
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153 | |
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154 | END DO |
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155 | END DO |
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156 | |
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157 | DO jk = 2, jpkm1 |
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158 | DO jj = 1, jpj |
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159 | DO ji = 1, jpi |
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160 | |
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161 | ! Separation in three light bands: red, green, blue |
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162 | ! ------------------------------------------------- |
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163 | |
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164 | zblight1 = zekb(ji,jj,jk-1) * fse3t(ji,jj,jk-1) |
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165 | zglight1 = zekg(ji,jj,jk-1) * fse3t(ji,jj,jk-1) |
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166 | zrlight1 = zekr(ji,jj,jk-1) * fse3t(ji,jj,jk-1) |
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167 | |
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168 | ze3lum(ji,jj,jk) = ze3lum(ji,jj,jk-1) * EXP( -zblight ) |
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169 | ze4lum(ji,jj,jk) = ze4lum(ji,jj,jk-1) * EXP( -zglight ) |
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170 | ze5lum(ji,jj,jk) = ze5lum(ji,jj,jk-1) * EXP( -zrlight ) |
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171 | ze6lum(ji,jj,jk) = ze6lum(ji,jj,jk-1) * EXP( -fse3t(ji,jj,jk-1) / xsi1 ) |
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172 | |
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173 | END DO |
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174 | END DO |
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175 | END DO |
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176 | |
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177 | etot3(:,:,:) = ze3lum(:,:,:) + ze4lum(:,:,:) + ze5lum(:,:,:) + ze6lum(:,:,:) |
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178 | |
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179 | ENDIF |
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180 | |
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181 | ! Computation of the euphotic depth |
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182 | ! --------------------------------- |
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183 | |
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184 | zmeu(:,:) = 300.e0 |
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185 | |
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186 | DO jk = 2, jpkm1 |
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187 | DO jj = 1, jpj |
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188 | DO ji = 1, jpi |
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189 | IF( etot(ji,jj,jk) >= 0.0043 * qsr(ji,jj) ) zmeu(ji,jj) = fsdepw(ji,jj,jk+1) |
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190 | END DO |
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191 | END DO |
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192 | END DO |
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193 | |
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194 | zmeu(:,:) = MIN( 300., zmeu(:,:) ) |
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195 | |
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196 | ! Computation of the mean light over the mixed layer depth |
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197 | ! -------------------------------------------------------- |
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198 | |
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199 | zdepmoy(:,:) = 0.e0 |
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200 | zetmp (:,:) = 0.e0 |
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201 | emoy (:,:,:) = 0.e0 |
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202 | |
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203 | DO jk = 1, jpkm1 |
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204 | DO jj = 1, jpj |
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205 | DO ji = 1, jpi |
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206 | IF( fsdepw(ji,jj,jk+1) <= hmld(ji,jj) ) THEN |
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207 | zetmp (ji,jj) = zetmp (ji,jj) + etot(ji,jj,jk) * fse3t(ji,jj,jk) |
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208 | zdepmoy(ji,jj) = zdepmoy(ji,jj) + fse3t(ji,jj,jk) |
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209 | ENDIF |
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210 | END DO |
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211 | END DO |
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212 | END DO |
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213 | |
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214 | emoy(:,:,:) = etot(:,:,:) |
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215 | |
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216 | DO jk = 1, jpkm1 |
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217 | DO jj = 1, jpj |
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218 | DO ji = 1, jpi |
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219 | IF( fsdepw(ji,jj,jk+1) <= hmld(ji,jj) ) THEN |
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220 | emoy(ji,jj,jk) = zetmp(ji,jj) / ( zdepmoy(ji,jj) + rtrn ) |
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221 | ENDIF |
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222 | END DO |
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223 | END DO |
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224 | END DO |
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225 | |
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226 | # if defined key_trc_diaadd |
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227 | trc2d(:,:,11) = zmeu(:,:) |
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228 | # endif |
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229 | ! |
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230 | END SUBROUTINE p4z_opt |
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231 | |
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232 | #else |
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233 | !!====================================================================== |
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234 | !! Dummy module : No PISCES bio-model |
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235 | !!====================================================================== |
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236 | CONTAINS |
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237 | SUBROUTINE p4z_opt ! Empty routine |
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238 | END SUBROUTINE p4z_opt |
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239 | #endif |
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240 | |
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241 | !!====================================================================== |
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242 | END MODULE p4zopt |
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