1 | MODULE trabbc |
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2 | !!============================================================================== |
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3 | !! *** MODULE trabbc *** |
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4 | !! Ocean active tracers: bottom boundary condition |
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5 | !!============================================================================== |
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6 | #if defined key_trabbc || defined key_esopa |
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7 | !!---------------------------------------------------------------------- |
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8 | !! 'key_trabbc' geothermal heat flux |
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9 | !!---------------------------------------------------------------------- |
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10 | !! tra_bbc : update the tracer trend at ocean bottom |
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11 | !! tra_bbc_init : initialization of geothermal heat flux trend |
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12 | !!---------------------------------------------------------------------- |
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13 | !! * Modules used |
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14 | USE oce ! ocean dynamics and active tracers |
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15 | USE dom_oce ! ocean space and time domain |
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16 | USE phycst ! physical constants |
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17 | USE in_out_manager ! I/O manager |
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18 | USE prtctl ! Print control |
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19 | |
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20 | IMPLICIT NONE |
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21 | PRIVATE |
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22 | |
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23 | !! * Accessibility |
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24 | PUBLIC tra_bbc ! routine called by step.F90 |
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25 | |
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26 | !! to be transfert in the namelist ???! |
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27 | LOGICAL, PUBLIC, PARAMETER :: lk_trabbc = .TRUE. !: bbc flag |
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28 | |
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29 | !! * Module variables |
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30 | INTEGER :: & !!! ** bbc namelist (nambbc) ** |
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31 | ngeo_flux = 1 ! Geothermal flux (0:no flux, 1:constant flux, |
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32 | ! ! 2:read in file ) |
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33 | REAL(wp) :: & !!! ** bbc namlist ** |
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34 | ngeo_flux_const = 86.4e-3 ! Constant value of geothermal heat flux |
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35 | |
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36 | INTEGER, DIMENSION(jpi,jpj) :: & |
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37 | nbotlevt ! ocean bottom level index at T-pt |
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38 | REAL(wp), DIMENSION(jpi,jpj) :: & |
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39 | qgh_trd ! geothermal heating trend |
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40 | |
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41 | !! * Substitutions |
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42 | # include "domzgr_substitute.h90" |
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43 | !!---------------------------------------------------------------------- |
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44 | !! OPA 9.0 , LOCEAN-IPSL (2005) |
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45 | !! $Header$ |
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46 | !! This software is governed by the CeCILL licence see 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 tra_bbc( kt ) |
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52 | !!---------------------------------------------------------------------- |
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53 | !! *** ROUTINE tra_bbc *** |
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54 | !! |
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55 | !! ** Purpose : Compute the bottom boundary contition on temperature |
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56 | !! associated with geothermal heating and add it to the general |
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57 | !! trend of temperature equations. |
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58 | !! |
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59 | !! ** Method : The geothermal heat flux set to its constant value of |
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60 | !! 86.4 mW/m2 (Stein and Stein 1992, Huang 1999). |
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61 | !! The temperature trend associated to this heat flux through the |
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62 | !! ocean bottom can be computed once and is added to the temperature |
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63 | !! trend juste above the bottom at each time step: |
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64 | !! ta = ta + Qsf / (rau0 rcp e3T) for k= mbathy -1 |
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65 | !! Where Qsf is the geothermal heat flux. |
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66 | !! |
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67 | !! ** Action : - update the temperature trends (ta) with the trend of |
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68 | !! the ocean bottom boundary condition |
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69 | !! |
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70 | !! References : |
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71 | !! Stein, C. A., and S. Stein, 1992, Nature, 359, 123-129. |
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72 | !! |
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73 | !! History : |
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74 | !! 8.1 ! 99-10 (G. Madec) original code |
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75 | !! 8.5 ! 02-08 (G. Madec) free form + modules |
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76 | !!---------------------------------------------------------------------- |
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77 | !! * Arguments |
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78 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
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79 | |
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80 | !! * Local declarations |
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81 | #if defined key_vectopt_loop && ! defined key_autotasking |
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82 | INTEGER :: ji ! dummy loop indices |
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83 | #else |
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84 | INTEGER :: ji, jj ! dummy loop indices |
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85 | #endif |
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86 | !!---------------------------------------------------------------------- |
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87 | |
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88 | ! 0. Initialization |
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89 | IF( kt == nit000 ) CALL tra_bbc_init |
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90 | |
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91 | ! 1. Add the geothermal heat flux trend on temperature |
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92 | |
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93 | SELECT CASE ( ngeo_flux ) |
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94 | |
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95 | CASE ( 1:2 ) ! geothermal heat flux |
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96 | |
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97 | #if defined key_vectopt_loop && ! defined key_autotasking |
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98 | DO ji = jpi+2, jpij-jpi-1 ! vector opt. (forced unrolling) |
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99 | ta(ji,1,nbotlevt(ji,1)) = ta(ji,1,nbotlevt(ji,1)) + qgh_trd(ji,1) |
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100 | END DO |
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101 | #else |
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102 | DO jj = 2, jpjm1 |
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103 | DO ji = 2, jpim1 |
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104 | ta(ji,jj,nbotlevt(ji,jj)) = ta(ji,jj,nbotlevt(ji,jj)) + qgh_trd(ji,jj) |
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105 | END DO |
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106 | END DO |
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107 | #endif |
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108 | |
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109 | IF(ln_ctl) THEN |
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110 | CALL prt_ctl(tab3d_1=ta, clinfo1=' bbc - Ta: ', mask1=tmask, clinfo3='tra-ta') |
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111 | ENDIF |
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112 | |
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113 | END SELECT |
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114 | |
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115 | END SUBROUTINE tra_bbc |
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116 | |
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117 | |
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118 | SUBROUTINE tra_bbc_init |
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119 | !!---------------------------------------------------------------------- |
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120 | !! *** ROUTINE tra_bbc_init *** |
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121 | !! |
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122 | !! ** Purpose : Compute once for all the trend associated with geo- |
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123 | !! thermal heating that will be applied at each time step at the |
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124 | !! bottom ocean level |
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125 | !! |
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126 | !! ** Method : Read the nambbc namelist and check the parameters. |
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127 | !! called at the first time step (nit000) |
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128 | !! |
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129 | !! ** Input : - Namlist nambbc |
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130 | !! - NetCDF file : geothermal_heating.nc ( if necessary ) |
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131 | !! |
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132 | !! ** Action : - compute the heat geothermal trend qgh_trd |
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133 | !! - compute the bottom ocean level nbotlevt |
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134 | !! |
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135 | !! history : |
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136 | !! 8.5 ! 02-11 (A. Bozec) original code |
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137 | !!---------------------------------------------------------------------- |
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138 | !! * Modules used |
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139 | USE ioipsl |
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140 | |
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141 | !! * local declarations |
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142 | CHARACTER (len=32) :: clname |
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143 | INTEGER :: ji, jj ! dummy loop indices |
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144 | INTEGER :: inum = 11 ! temporary logical unit |
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145 | INTEGER :: itime ! temporary integers |
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146 | REAL(wp) :: zdate0, zdt ! temporary scalars |
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147 | REAL(wp), DIMENSION(1) :: zdept ! temporary workspace |
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148 | REAL(wp), DIMENSION(jpidta,jpjdta) :: & |
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149 | zlamt, zphit, zdta ! temporary workspace |
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150 | |
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151 | NAMELIST/nambbc/ngeo_flux, ngeo_flux_const |
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152 | !!---------------------------------------------------------------------- |
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153 | |
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154 | ! Read Namelist nambbc : bottom momentum boundary condition |
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155 | REWIND ( numnam ) |
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156 | READ ( numnam, nambbc ) |
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157 | |
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158 | ! Control print |
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159 | IF(lwp) WRITE(numout,*) |
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160 | IF(lwp) WRITE(numout,*) 'tra_bbc : tempearture Bottom Boundary Condition (bbc)' |
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161 | IF(lwp) WRITE(numout,*) '~~~~~~~ Geothermal heatflux' |
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162 | IF(lwp) WRITE(numout,*) ' Namelist nambbc : set bbc parameters' |
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163 | IF(lwp) WRITE(numout,*) |
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164 | IF(lwp) WRITE(numout,*) ' Geothermal flux ngeo_flux = ', ngeo_flux |
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165 | IF(lwp) WRITE(numout,*) ' Constant geothermal flux ngeo_flux_const = ', ngeo_flux_const |
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166 | IF(lwp) WRITE(numout,*) |
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167 | |
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168 | ! level of the ocean bottom at T-point |
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169 | |
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170 | DO jj = 1, jpj |
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171 | DO ji = 1, jpi |
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172 | nbotlevt(ji,jj) = MAX( mbathy(ji,jj)-1, 1 ) |
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173 | END DO |
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174 | END DO |
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175 | |
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176 | ! initialization of geothermal heat flux |
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177 | |
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178 | SELECT CASE ( ngeo_flux ) |
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179 | |
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180 | CASE ( 0 ) ! no geothermal heat flux |
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181 | IF(lwp) WRITE(numout,*) |
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182 | IF(lwp) WRITE(numout,*) ' *** no geothermal heat flux' |
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183 | |
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184 | CASE ( 1 ) ! constant flux |
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185 | IF(lwp) WRITE(numout,*) ' *** constant heat flux = ', ngeo_flux_const |
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186 | qgh_trd(:,:) = ngeo_flux_const |
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187 | |
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188 | CASE ( 2 ) ! variable geothermal heat flux |
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189 | ! read the geothermal fluxes in mW/m2 |
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190 | clname = 'geothermal_heating' |
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191 | itime = 1 |
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192 | zlamt(:,:) = 0. |
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193 | zphit(:,:) = 0. |
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194 | IF(lwp) WRITE(numout,*) ' *** variable geothermal heat flux read in ', clname, ' file' |
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195 | CALL restini( clname, jpidta, jpjdta, zlamt, zphit, 1, zdept , 'NONE', & |
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196 | & itime, zdate0, zdt, inum, domain_id=nidom ) |
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197 | CALL restget( inum, 'heatflow', jpidta, jpjdta, 1, 0, .FALSE., zdta ) |
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198 | DO jj = 1, nlcj |
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199 | DO ji = 1, nlci |
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200 | qgh_trd(ji,jj) = zdta(mig(ji),mjg(jj)) |
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201 | END DO |
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202 | END DO |
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203 | |
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204 | CALL restclo( inum ) |
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205 | qgh_trd(:,:) = qgh_trd(:,:) * 1.e-3 ! conversion in W/m2 |
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206 | |
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207 | CASE DEFAULT |
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208 | IF(lwp) WRITE(numout,cform_err) |
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209 | IF(lwp) WRITE(numout,*) ' bad flag value for ngeo_flux = ', ngeo_flux |
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210 | nstop = nstop + 1 |
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211 | |
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212 | END SELECT |
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213 | |
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214 | ! geothermal heat flux trend |
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215 | |
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216 | SELECT CASE ( ngeo_flux ) |
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217 | |
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218 | CASE ( 1:2 ) ! geothermal heat flux |
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219 | |
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220 | #if defined key_vectopt_loop && ! defined key_autotasking |
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221 | DO ji = 1, jpij ! vector opt. (forced unrolling) |
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222 | qgh_trd(ji,1) = ro0cpr * qgh_trd(ji,1) / fse3t(ji,1,nbotlevt(ji,1) ) |
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223 | END DO |
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224 | #else |
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225 | DO jj = 1, jpj |
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226 | DO ji = 1, jpi |
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227 | qgh_trd(ji,jj) = ro0cpr * qgh_trd(ji,jj) / fse3t(ji,jj,nbotlevt(ji,jj)) |
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228 | END DO |
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229 | END DO |
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230 | #endif |
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231 | |
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232 | END SELECT |
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233 | |
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234 | END SUBROUTINE tra_bbc_init |
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235 | |
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236 | #else |
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237 | !!---------------------------------------------------------------------- |
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238 | !! Default option Empty module |
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239 | !!---------------------------------------------------------------------- |
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240 | LOGICAL, PUBLIC, PARAMETER :: lk_trabbc = .FALSE. !: bbc flag |
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241 | CONTAINS |
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242 | SUBROUTINE tra_bbc( kt ) ! Empty routine |
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243 | WRITE(*,*) 'tra_bbc: You should not have seen this print! error?', kt |
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244 | END SUBROUTINE tra_bbc |
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245 | #endif |
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246 | |
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247 | !!====================================================================== |
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248 | END MODULE trabbc |
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