1 | MODULE traqsr |
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2 | !!====================================================================== |
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3 | !! *** MODULE traqsr *** |
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4 | !! Ocean physics: solar radiation penetration in the top ocean levels |
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5 | !!====================================================================== |
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6 | |
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7 | !!---------------------------------------------------------------------- |
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8 | !! tra_qsr : trend due to the solar radiation penetration |
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9 | !! tra_qsr_init : solar radiation penetration initialization |
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10 | !!---------------------------------------------------------------------- |
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11 | !! * Modules used |
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12 | USE oce ! ocean dynamics and active tracers |
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13 | USE dom_oce ! ocean space and time domain |
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14 | USE trdmod ! ocean active tracers trends |
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15 | USE trdmod_oce ! ocean variables trends |
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16 | USE in_out_manager ! I/O manager |
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17 | |
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18 | USE trc_oce ! share SMS/Ocean variables |
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19 | |
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20 | USE ocesbc ! thermohaline fluxes |
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21 | USE phycst ! physical constants |
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22 | |
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23 | IMPLICIT NONE |
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24 | PRIVATE |
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25 | |
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26 | !! * Routine accessibility |
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27 | PUBLIC tra_qsr ! routine called by step.F90 (ln_traqsr=T) |
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28 | PUBLIC tra_qsr_init ! routine called by opa.F90 |
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29 | |
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30 | !! * Shared module variables |
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31 | LOGICAL, PUBLIC :: ln_traqsr = .TRUE. !: qsr flag (Default=T) |
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32 | |
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33 | !! * Module variables |
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34 | REAL(wp), PUBLIC :: & !!! * penetrative solar radiation namelist * |
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35 | rabs = 0.58_wp, & ! fraction associated with xsi1 |
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36 | xsi1 = 0.35_wp, & ! first depth of extinction |
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37 | xsi2 = 23.0_wp ! second depth of extinction |
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38 | ! ! (default values: water type Ib) |
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39 | LOGICAL :: & |
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40 | ln_qsr_sms = .false. ! flag to use or not the biological |
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41 | ! ! fluxes for light |
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42 | |
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43 | INTEGER :: & |
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44 | nksr ! number of levels |
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45 | REAL(wp), DIMENSION(jpk) :: & |
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46 | gdsr ! profile of the solar flux penetration |
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47 | |
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48 | !! * Substitutions |
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49 | # include "domzgr_substitute.h90" |
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50 | # include "vectopt_loop_substitute.h90" |
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51 | !!---------------------------------------------------------------------- |
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52 | !! OPA 9.0 , LOCEAN-IPSL (2005) |
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53 | !! $Header$ |
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54 | !! This software is governed by the CeCILL licence see modipsl/doc/NEMO_CeCILL.txt |
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55 | !!---------------------------------------------------------------------- |
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56 | |
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57 | CONTAINS |
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58 | |
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59 | SUBROUTINE tra_qsr( kt ) |
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60 | !!---------------------------------------------------------------------- |
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61 | !! *** ROUTINE tra_qsr *** |
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62 | !! |
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63 | !! ** Purpose : Compute the temperature trend due to the solar radiation |
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64 | !! penetration and add it to the general temperature trend. |
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65 | !! |
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66 | !! ** Method : The profile of the solar radiation within the ocean is |
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67 | !! defined through two penetration length scale (xsr1,xsr2) and a |
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68 | !! ratio (rabs) as : |
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69 | !! I(k) = Qsr*( rabs*EXP(z(k)/xsr1) + (1.-rabs)*EXP(z(k)/xsr2) ) |
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70 | !! The temperature trend associated with the solar radiation |
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71 | !! penetration is given by : |
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72 | !! zta = 1/e3t dk[ I ] / (rau0*Cp) |
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73 | !! At the bottom, boudary condition for the radiation is no flux : |
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74 | !! all heat which has not been absorbed in the above levels is put |
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75 | !! in the last ocean level. |
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76 | !! In z-coordinate case, the computation is only done down to the |
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77 | !! level where I(k) < 1.e-15 W/m2. In addition, the coefficients |
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78 | !! used for the computation are calculated one for once as they |
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79 | !! depends on k only. |
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80 | !! |
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81 | !! ** Action : - update ta with the penetrative solar radiation trend |
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82 | !! - save the trend in ttrd ('key_trdtra') |
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83 | !! |
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84 | !! History : |
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85 | !! 6.0 ! 90-10 (B. Blanke) Original code |
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86 | !! 7.0 ! 91-11 (G. Madec) |
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87 | !! ! 96-01 (G. Madec) s-coordinates |
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88 | !! 8.5 ! 02-06 (G. Madec) F90: Free form and module |
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89 | !! 9.0 ! 04-08 (C. Talandier) New trends organization |
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90 | !!---------------------------------------------------------------------- |
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91 | !! * Modules used |
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92 | USE oce, ONLY : ztdta => ua, & ! use ua as 3D workspace |
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93 | ztdsa => va ! use va as 3D workspace |
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94 | |
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95 | !! * Arguments |
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96 | INTEGER, INTENT( in ) :: kt ! ocean time-step |
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97 | |
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98 | !! * Local declarations |
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99 | INTEGER :: ji, jj, jk ! dummy loop indexes |
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100 | REAL(wp) :: zc0, zta ! temporary scalars |
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101 | REAL(wp) :: zc1 , zc2 , & ! temporary scalars |
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102 | zdp1, zdp2 ! |
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103 | !!---------------------------------------------------------------------- |
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104 | |
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105 | IF( kt == nit000 ) THEN |
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106 | IF ( lwp ) WRITE(numout,*) |
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107 | IF ( lwp ) WRITE(numout,*) 'tra_qsr : penetration of the surface solar radiation' |
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108 | IF ( lwp ) WRITE(numout,*) '~~~~~~~' |
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109 | ENDIF |
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110 | |
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111 | ! Save ta and sa trends |
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112 | IF( l_trdtra ) THEN |
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113 | ztdta(:,:,:) = ta(:,:,:) |
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114 | ztdsa(:,:,:) = 0.e0 |
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115 | ENDIF |
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116 | |
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117 | IF( lk_qsr_sms .AND. ln_qsr_sms ) THEN ! Biological fluxes ! |
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118 | ! ! =================== ! |
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119 | ! |
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120 | ! ! =============== |
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121 | DO jk = 1, jpkm1 ! Horizontal slab |
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122 | ! ! =============== |
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123 | DO jj = 2, jpjm1 |
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124 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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125 | |
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126 | zc0 = ro0cpr / fse3t(ji,jj,jk) ! compute the qsr trend |
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127 | zta = zc0 * ( etot3(ji,jj,jk ) * tmask(ji,jj,jk) & |
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128 | & - etot3(ji,jj,jk+1) * tmask(ji,jj,jk+1) ) |
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129 | |
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130 | ta(ji,jj,jk) = ta(ji,jj,jk) + zta ! add qsr trend to the temperature trend |
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131 | |
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132 | END DO |
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133 | END DO |
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134 | ! ! =============== |
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135 | END DO ! End of slab |
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136 | ! ! =============== |
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137 | ! save the trends for diagnostic |
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138 | ! qsr tracers trends |
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139 | IF( l_trdtra ) THEN |
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140 | ztdta(:,:,:) = ta(:,:,:) - ztdta(:,:,:) |
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141 | CALL trd_mod(ztdta, ztdsa, jpttdqsr, 'TRA', kt) |
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142 | ENDIF |
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143 | |
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144 | ELSE |
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145 | ! ! =================== ! |
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146 | IF( lk_sco ) THEN ! s-coordinate ! |
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147 | ! ! =================== ! |
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148 | ! |
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149 | ! ! =============== |
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150 | DO jk = 1, jpkm1 ! Horizontal slab |
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151 | ! ! =============== |
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152 | DO jj = 2, jpjm1 |
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153 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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154 | |
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155 | zdp1 = -fsdepw(ji,jj,jk ) ! compute the qsr trend |
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156 | zdp2 = -fsdepw(ji,jj,jk+1) |
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157 | zc0 = qsr(ji,jj) * ro0cpr / fse3t(ji,jj,jk) |
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158 | zc1 = ( rabs * EXP(zdp1/xsi1) + (1.-rabs) * EXP(zdp1/xsi2) ) |
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159 | zc2 = - ( rabs * EXP(zdp2/xsi1) + (1.-rabs) * EXP(zdp2/xsi2) ) |
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160 | zta = zc0 * ( zc1 * tmask(ji,jj,jk) + zc2 * tmask(ji,jj,jk+1) ) |
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161 | |
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162 | ta(ji,jj,jk) = ta(ji,jj,jk) + zta ! add qsr trend to the temperature trend |
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163 | |
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164 | END DO |
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165 | END DO |
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166 | ! ! =============== |
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167 | END DO ! End of slab |
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168 | ! ! =============== |
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169 | ! save the trends for diagnostic |
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170 | ! qsr tracers trends |
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171 | IF( l_trdtra ) THEN |
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172 | ztdta(:,:,:) = ta(:,:,:) - ztdta(:,:,:) |
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173 | CALL trd_mod(ztdta, ztdsa, jpttdqsr, 'TRA', kt) |
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174 | ENDIF |
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175 | ! |
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176 | ENDIF |
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177 | ! ! =================== ! |
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178 | IF( lk_zps ) THEN ! partial steps ! |
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179 | ! ! =================== ! |
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180 | ! |
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181 | ! ! =============== |
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182 | DO jk = 1, nksr ! Horizontal slab |
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183 | ! ! =============== |
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184 | DO jj = 2, jpjm1 |
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185 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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186 | |
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187 | zc0 = qsr(ji,jj) / fse3t(ji,jj,jk) ! compute the qsr trend |
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188 | zta = zc0 * ( gdsr(jk) * tmask(ji,jj,jk) - gdsr(jk+1) * tmask(ji,jj,jk+1) ) |
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189 | |
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190 | ta(ji,jj,jk) = ta(ji,jj,jk) + zta ! add qsr trend to the temperature trend |
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191 | |
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192 | END DO |
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193 | END DO |
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194 | ! ! =============== |
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195 | END DO ! End of slab |
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196 | ! ! =============== |
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197 | ! save the trends for diagnostic |
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198 | ! qsr tracers trends |
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199 | IF( l_trdtra ) THEN |
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200 | ztdta(:,:,:) = ta(:,:,:) - ztdta(:,:,:) |
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201 | CALL trd_mod(ztdta, ztdsa, jpttdqsr, 'TRA', kt) |
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202 | ENDIF |
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203 | ! |
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204 | ENDIF |
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205 | ! ! =================== ! |
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206 | IF( lk_zco ) THEN ! z-coordinate ! |
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207 | ! ! =================== ! |
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208 | ! |
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209 | ! ! =============== |
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210 | DO jk = 1, nksr ! Horizontal slab |
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211 | ! ! =============== |
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212 | zc0 = 1. / fse3t(1,1,jk) |
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213 | DO jj = 2, jpjm1 |
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214 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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215 | ! ! compute qsr forcing trend |
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216 | zta = qsr(ji,jj) * zc0 * ( gdsr(jk)*tmask(ji,jj,jk) - gdsr(jk+1)*tmask(ji,jj,jk+1) ) |
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217 | |
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218 | ta(ji,jj,jk) = ta(ji,jj,jk) + zta ! add qsr trend to the temperature trend |
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219 | |
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220 | END DO |
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221 | END DO |
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222 | ! ! =============== |
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223 | END DO ! End of slab |
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224 | ! ! =============== |
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225 | ! save the trends for diagnostic |
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226 | ! qsr tracers trends |
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227 | IF( l_trdtra ) THEN |
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228 | ztdta(:,:,:) = ta(:,:,:) - ztdta(:,:,:) |
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229 | CALL trd_mod(ztdta, ztdsa, jpttdqsr, 'TRA', kt) |
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230 | ENDIF |
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231 | ! |
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232 | ENDIF |
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233 | ! |
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234 | ENDIF |
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235 | |
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236 | |
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237 | IF(l_ctl) THEN ! print mean trends (used for debugging) |
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238 | zta = SUM( ta(2:nictl,2:njctl,1:jpkm1) * tmask(2:nictl,2:njctl,1:jpkm1) ) |
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239 | WRITE(numout,*) ' qsr - Ta: ', zta-t_ctl |
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240 | t_ctl = zta |
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241 | ENDIF |
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242 | |
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243 | |
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244 | ! 2. Substract qsr from the total heat flux q |
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245 | ! ------------------------------------------- |
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246 | DO jj = 2, jpjm1 |
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247 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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248 | q(ji,jj) = qt(ji,jj) - qsr(ji,jj) |
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249 | END DO |
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250 | END DO |
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251 | |
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252 | END SUBROUTINE tra_qsr |
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253 | |
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254 | |
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255 | SUBROUTINE tra_qsr_init |
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256 | !!---------------------------------------------------------------------- |
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257 | !! *** ROUTINE tra_qsr_init *** |
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258 | !! |
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259 | !! ** Purpose : Initialization for the penetrative solar radiation |
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260 | !! |
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261 | !! ** Method : The profile of solar radiation within the ocean is set |
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262 | !! from two length scale of penetration (xsr1,xsr2) and a ratio |
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263 | !! (rabs). These parameters are read in the namqsr namelist. The |
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264 | !! default values correspond to clear water (type I in Jerlov' |
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265 | !! (1968) classification. |
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266 | !! called by tra_qsr at the first timestep (nit000) |
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267 | !! |
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268 | !! ** Action : - initialize xsr1, xsr2 and rabs |
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269 | !! |
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270 | !! Reference : |
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271 | !! Jerlov, N. G., 1968 Optical Oceanography, Elsevier, 194pp. |
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272 | !! |
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273 | !! History : |
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274 | !! 8.5 ! 02-06 (G. Madec) Original code |
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275 | !!---------------------------------------------------------------------- |
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276 | !! * Local declarations |
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277 | INTEGER :: ji,jj,jk, & ! dummy loop index |
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278 | indic ! temporary integer |
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279 | REAL(wp) :: zdp1 ! temporary scalar |
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280 | |
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281 | NAMELIST/namqsr/ ln_traqsr, rabs, xsi1, xsi2, ln_qsr_sms |
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282 | !!---------------------------------------------------------------------- |
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283 | |
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284 | ! Read Namelist namqsr : ratio and length of penetration |
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285 | ! -------------------- |
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286 | REWIND ( numnam ) |
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287 | READ ( numnam, namqsr ) |
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288 | |
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289 | ! Parameter control and print |
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290 | ! --------------------------- |
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291 | IF( ln_traqsr ) THEN |
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292 | IF ( lwp ) THEN |
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293 | WRITE(numout,*) |
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294 | WRITE(numout,*) 'tra_qsr_init : penetration of the surface solar radiation' |
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295 | WRITE(numout,*) '~~~~~~~~~~~~' |
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296 | WRITE(numout,*) ' Namelist namqsr : set the parameter of penetration' |
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297 | WRITE(numout,*) ' fraction associated with xsi rabs = ',rabs |
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298 | WRITE(numout,*) ' first depth of extinction xsi1 = ',xsi1 |
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299 | WRITE(numout,*) ' second depth of extinction xsi2 = ',xsi2 |
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300 | IF( lk_qsr_sms ) THEN |
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301 | WRITE(numout,*) ' Biological fluxes for light(Y/N) ln_qsr_sms = ',ln_qsr_sms |
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302 | ENDIF |
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303 | WRITE(numout,*) ' ' |
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304 | END IF |
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305 | ELSE |
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306 | IF ( lwp ) THEN |
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307 | WRITE(numout,*) |
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308 | WRITE(numout,*) 'tra_qsr_init : NO solar flux penetration' |
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309 | WRITE(numout,*) '~~~~~~~~~~~~' |
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310 | END IF |
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311 | ENDIF |
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312 | |
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313 | IF( rabs > 1.e0 .OR. rabs < 0.e0 .OR. xsi1 < 0.e0 .OR. xsi2 < 0.e0 ) THEN |
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314 | IF(lwp) WRITE(numout,cform_err) |
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315 | IF(lwp) WRITE(numout,*) ' 0<rabs<1, 0<xsi1, or 0<xsi2 not satisfied' |
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316 | nstop = nstop + 1 |
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317 | ENDIF |
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318 | |
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319 | |
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320 | ! Initialization |
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321 | ! -------------- |
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322 | IF( .NOT. lk_sco ) THEN |
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323 | ! z-coordinate with or without partial step : same before last ocean w-level everywhere |
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324 | gdsr(:) = 0.e0 |
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325 | DO jk = 1, jpk |
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326 | zdp1 = -fsdepw(1,1,jk) |
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327 | gdsr(jk) = ro0cpr * ( rabs * EXP( zdp1/xsi1 ) + (1.-rabs) * EXP( zdp1/xsi2 ) ) |
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328 | IF ( gdsr(jk) <= 1.e-10 ) EXIT |
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329 | END DO |
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330 | indic = 0 |
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331 | DO jk = 1, jpk |
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332 | IF( gdsr(jk) <= 1.e-15 .AND. indic == 0 ) THEN |
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333 | gdsr(jk) = 0.e0 |
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334 | nksr = jk |
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335 | !!bug Edmee chg res nksr = jk - 1 |
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336 | indic = 1 |
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337 | ENDIF |
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338 | END DO |
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339 | nksr = MIN( nksr, jpkm1 ) |
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340 | IF(lwp) THEN |
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341 | WRITE(numout,*) |
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342 | WRITE(numout,*) ' - z-coordinate, level max of computation =', nksr |
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343 | WRITE(numout,*) ' profile of coef. of penetration:' |
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344 | WRITE(numout,"(' ',7e11.2)") ( gdsr(jk), jk = 1, nksr ) |
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345 | WRITE(numout,*) |
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346 | ENDIF |
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347 | ! Initialisation of Biological fluxes for light here because |
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348 | ! the optical biological model is call after the dynamical one |
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349 | IF( lk_qsr_sms .AND. ln_qsr_sms ) THEN |
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350 | DO jk = 1, jpkm1 |
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351 | DO jj = 1, jpj |
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352 | DO ji = 1, jpi |
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353 | etot3(ji,jj,jk) = qsr(ji,jj) * gdsr(jk) * tmask(ji,jj,jk) / ro0cpr |
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354 | END DO |
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355 | END DO |
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356 | END DO |
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357 | ENDIF |
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358 | |
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359 | ENDIF |
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360 | |
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361 | END SUBROUTINE tra_qsr_init |
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362 | |
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363 | !!====================================================================== |
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364 | END MODULE traqsr |
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