1 | !> \file dragging_prescr_beta_mod.f90 |
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2 | !! Module pour calculer le beta a partir d'une carte sur les noeuds centres. |
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3 | !< |
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4 | |
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5 | !> \namespace dragging_prescr_beta |
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6 | !! Calcule le beta a partir de vitesses de bilan |
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7 | !! @note Il faut partir d'un cptr |
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8 | !! \author ... |
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9 | !! \date ... |
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10 | !! @note Used module |
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11 | !! @note - use module3D_phy |
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12 | !< |
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13 | |
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14 | module dragging_prescr_beta |
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15 | |
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16 | |
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17 | use module3d_phy |
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18 | use interface_input |
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19 | implicit none |
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20 | real, dimension(nx,ny) :: Vcol_x !< uniquement pour compatibilite |
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21 | real, dimension(nx,ny) :: Vcol_y !< |
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22 | real, dimension(nx,ny) :: Vsl_x !< |
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23 | real, dimension(nx,ny) :: Vsl_y !< |
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24 | |
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25 | |
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26 | real, dimension(nx,ny) :: drag_centre !< beta on major node (average) |
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27 | real, dimension(nx,ny) :: betamoy_x !< pour faire les moyennes glissantes |
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28 | real, dimension(nx,ny) :: betamoy_y !< |
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29 | integer, dimension(nx,ny) :: nbvoisx !< |
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30 | integer, dimension(nx,ny) :: nbvoisy !< |
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31 | |
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32 | |
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33 | real :: beta_limgz !< when beta gt beta_limgz -> not gzmx |
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34 | real :: beta_min !< minimum value of beta |
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35 | real :: beta_mult !< coefficient of beta field |
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36 | integer :: ill,jll,nmoy |
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37 | |
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38 | real :: maxi !< calcul correction dS a la grounding line |
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39 | real :: mini |
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40 | |
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41 | logical :: corr_def = .False. !< for deformation correction (compatibility) |
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42 | |
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43 | contains |
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44 | |
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45 | !----------------------------------------------------------------------------------------- |
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46 | !> SUBROUTINE: init_dragging |
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47 | !! Cette routine fait l'initialisation du dragging. |
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48 | !< |
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49 | subroutine init_dragging ! Cette routine fait l'initialisation du dragging. |
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50 | ! nouvelle version : lit les fichiers nc |
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51 | implicit none |
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52 | character(len=100) :: beta_c_file ! beta on centered grid |
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53 | character(len=100) :: betamx_file ! beta on staggered grid mx |
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54 | character(len=100) :: betamy_file ! beta on staggered grid mx |
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55 | |
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56 | namelist/beta_prescr/beta_c_file,beta_limgz,beta_min,beta_mult |
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57 | |
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58 | if (itracebug.eq.1) call tracebug(' Prescr_beta subroutine init_dragging') |
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59 | |
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60 | iter_beta=0 |
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61 | |
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62 | ! lecture des parametres du run |
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63 | !-------------------------------------------------------------------- |
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64 | |
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65 | rewind(num_param) ! pour revenir au debut du fichier param_list.dat |
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66 | 428 format(A) |
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67 | read(num_param,beta_prescr) |
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68 | |
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69 | write(num_rep_42,428) '!___________________________________________________________' |
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70 | write(num_rep_42,428) '! read beta on centered grid' |
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71 | write(num_rep_42,beta_prescr) |
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72 | write(num_rep_42,428) '! beta_file : nom des fichier qui contiennent les beta_c' |
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73 | write(num_rep_42,428) '! above beta_limgz, gzmx is false' |
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74 | write(num_rep_42,428) '! if grounded, beta_min minimum value ' |
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75 | write(num_rep_42,428) '! beta_mult : coefficient just after reading' |
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76 | write(num_rep_42,*) |
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77 | write(num_rep_42,428) '!___________________________________________________________' |
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78 | |
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79 | |
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80 | beta_c_file = trim(dirnameinp)//trim(beta_c_file) |
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81 | betamx_file = trim(dirnameinp)//trim(betamx_file) |
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82 | betamy_file = trim(dirnameinp)//trim(betamy_file) |
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83 | betamax = beta_limgz |
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84 | betamax_2d(:,:) = betamax |
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85 | |
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86 | ! read the beta value on centered and staggered grids |
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87 | ! call lect_input(1,'beta_c',1,drag_centre,beta_c_file,trim(dirnameinp)//trim(runname)//'.nc') |
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88 | ! call lect_input(1,'betamx',1,drag_mx,betamx_file,trim(dirnameinp)//trim(runname)//'.nc') |
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89 | ! call lect_input(1,'betamy',1,drag_my,betamy_file,trim(dirnameinp)//trim(runname)//'.nc') |
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90 | |
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91 | |
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92 | call lect_input(1,'beta_c',1,drag_centre,beta_c_file,'') |
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93 | |
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94 | ! multiplication par le coefficient beta_mult |
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95 | |
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96 | drag_centre(:,:) = drag_centre(:,:)*beta_mult |
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97 | |
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98 | where (mk_init(:,:).eq.-2) ! iles a probleme |
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99 | drag_centre(:,:) = 2.* abs(beta_limgz) |
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100 | end where |
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101 | |
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102 | |
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103 | where ((H(:,:).lt.0.1).and.(Bsoc(:,:).gt.0)) ! zones actuellement non couvertes |
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104 | drag_centre(:,:) = 1000. ! valeur relativement faible qui evite |
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105 | end where ! les freinages |
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106 | |
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107 | |
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108 | |
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109 | ! call lect_input(1,'betamx',1,drag_mx,betamx_file,'') |
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110 | ! call lect_input(1,'betamy',1,drag_my,betamy_file,'') |
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111 | |
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112 | |
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113 | call beta_c2stag(nx,ny,drag_mx,drag_my,drag_centre) ! redistribute on staggered grid |
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114 | |
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115 | if (beta_limgz.gt.0.) then |
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116 | beta_centre(:,:) = drag_centre(:,:) |
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117 | betamx(:,:) = drag_mx(:,:) |
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118 | betamy(:,:) = drag_my(:,:) |
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119 | |
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120 | else if (beta_limgz.lt.0.) then ! attention sans doute pour plastic |
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121 | |
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122 | beta_centre(:,:) = - beta_limgz |
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123 | betamx(:,:) = - beta_limgz |
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124 | betamy(:,:) = - beta_limgz |
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125 | drag_centre(:,:) = - beta_limgz |
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126 | drag_mx(:,:) = - beta_limgz |
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127 | drag_my(:,:) = - beta_limgz |
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128 | beta_limgz = 1. |
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129 | end if |
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130 | |
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131 | |
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132 | ! divers traitements qui peuvent etre appliques a beta : mis sous forme de routine |
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133 | |
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134 | ! call beta_plateau_slope ! give value beta_limgz to places where slope is >1.e-2 |
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135 | ! call beta_stag2c ! average the staggered values on central ones |
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136 | ! call beta_plateau_S ! give value beta_limgz to places where S > 2500 m |
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137 | |
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138 | call beta_min_value(beta_min) ! valeur mini que peut avoir beta (en Pa an m-1) |
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139 | ! on peut envisager une valeur ~ 10 |
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140 | ! rappel : beta doit être positif. |
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141 | |
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142 | ! call beta_c2stag(nx,ny,drag_mx,drag_my,drag_centre) ! redistribute on staggered grid |
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143 | |
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144 | |
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145 | ! mstream attribution |
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146 | !________________________ |
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147 | ! mstream -> regions where streaming is allowed |
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148 | ! drag_mx -> value of beta if an ice stream is allowed |
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149 | ! betamx -> value of dragging (may depend on other conditions) |
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150 | |
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151 | ! to ensure having some "Dirichlet" points, there must be at least |
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152 | ! a mstream=0 in every island |
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153 | |
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154 | |
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155 | ! un tour de lissage |
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156 | ! call beta_stag2c(nx,ny,drag_mx,drag_my,drag_centre) ! average staggered |
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157 | ! ! on central |
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158 | |
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159 | ! call beta_c2stag(nx,ny,drag_mx,drag_my,drag_centre) ! centered distributed |
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160 | ! ! on staggered |
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161 | ! |
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162 | |
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163 | |
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164 | beta_centre(:,:) = drag_centre(:,:) ! surtout pour sorties |
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165 | |
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166 | |
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167 | |
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168 | where (drag_mx(:,:).ge.beta_limgz) |
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169 | mstream_mx(:,:) = 0 |
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170 | betamx(:,:) = beta_limgz |
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171 | drag_mx(:,:) = beta_limgz |
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172 | elsewhere |
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173 | mstream_mx(:,:) = 1 |
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174 | betamx(:,:) = drag_mx(:,:) |
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175 | endwhere |
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176 | |
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177 | where (drag_my(:,:).ge.beta_limgz) |
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178 | mstream_my(:,:) = 0 |
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179 | betamy(:,:) = beta_limgz |
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180 | drag_my(:,:) = beta_limgz |
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181 | elsewhere |
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182 | mstream_my(:,:) = 1 |
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183 | betamy(:,:) = drag_my(:,:) |
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184 | endwhere |
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185 | |
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186 | if (itracebug.eq.1) call tracebug(' Prescr_beta apres lecture') |
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187 | mstream_mx(:,:) = 0 |
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188 | mstream_my(:,:) = 0 |
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189 | |
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190 | |
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191 | call gzm_beta_prescr |
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192 | ! call write_datfile2(nx,ny,betamx,betamy,'beta-LBq15-08.dat') |
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193 | |
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194 | ! call make_gaussienne(n_g,sigma_beta,M_gauss) |
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195 | |
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196 | return |
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197 | |
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198 | end subroutine init_dragging |
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199 | !________________________________________________________________________________ |
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200 | |
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201 | !> SUBROUTINE: dragging |
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202 | !! Defini la localisation des streams et le frottement basal |
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203 | !< |
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204 | !------------------------------------------------------------------------- |
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205 | subroutine dragging ! defini la localisation des streams et le frottement basal |
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206 | |
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207 | implicit none |
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208 | |
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209 | |
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210 | |
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211 | if (itracebug.eq.1) call tracebug(' beta_prescr subroutine dragging') |
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212 | |
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213 | |
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214 | ! tentative d'iteration |
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215 | |
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216 | ! call beta_stag2c(nx,ny,drag_mx,drag_my,drag_centre) ! average staggered |
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217 | ! on central |
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218 | ! call iter_gauss(n_g,nx,ny,M_gauss,-1.,drag_centre,corrstream_centre,hdot) ! correct central |
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219 | ! call beta_c2stag(nx,ny,drag_mx,drag_my,corrstream_centre) ! centered distributed |
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220 | ! on staggered |
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221 | ! drag_centre(:,:) = corrstream_centre(:,:) |
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222 | ! beta_centre(:,:) = drag_centre(:,:) ! surtout pour sorties |
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223 | |
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224 | ! pour l'instant pas d'autre condition que mstream |
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225 | where (mstream_mx(:,:).eq.1) |
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226 | betamx(:,:) = drag_mx(:,:) |
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227 | elsewhere |
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228 | betamx(:,:)= beta_limgz |
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229 | end where |
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230 | |
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231 | where (mstream_my(:,:).eq.1) |
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232 | betamy(:,:) = drag_my(:,:) |
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233 | elsewhere |
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234 | betamy(:,:)= beta_limgz |
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235 | end where |
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236 | |
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237 | betamx(:,:)=drag_mx(:,:) |
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238 | betamy(:,:)=drag_my(:,:) |
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239 | |
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240 | call gzm_beta_prescr ! determine gz et flgz et met a 0 le beta des points flottants |
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241 | |
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242 | |
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243 | return |
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244 | end subroutine dragging |
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245 | |
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246 | !---------------------------------------------------------------------------------- |
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247 | !>SUBROUTINE: gzm_beta_prescr |
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248 | !! Calcul de gzmx |
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249 | !< |
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250 | |
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251 | subroutine gzm_beta_prescr ! attribue flgzmx et gzmx (et my) |
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252 | |
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253 | logical :: test_Tx ! test if there is a basal melting point in the surrounding |
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254 | logical :: test_Ty ! test if there is a basal melting point in the surrounding |
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255 | logical :: test_beta_x ! test if there is a low drag point in the surrounding |
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256 | logical :: test_beta_y ! test if there is a low drag point in the surrounding |
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257 | |
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258 | real :: beta_forc_fleuve ! below this value -> ice stream |
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259 | |
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260 | ! beta_forc_fleuve = 5.e3 |
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261 | beta_forc_fleuve = beta_limgz |
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262 | |
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263 | ! calcul de gzmx |
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264 | |
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265 | |
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266 | gzmx(:,:)=.true. |
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267 | gzmy(:,:)=.true. |
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268 | flgzmx(:,:)=.false. |
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269 | flgzmy(:,:)=.false. |
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270 | |
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271 | |
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272 | ! points flottants : flgzmx mais pas gzmx |
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273 | do j=2,ny |
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274 | do i=2,nx |
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275 | if (flot(i,j).and.(flot(i-1,j))) then |
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276 | flotmx(i,j)=.true. |
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277 | flgzmx(i,j)=.true. |
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278 | gzmx(i,j)=.false. |
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279 | betamx(i,j)=0. |
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280 | end if |
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281 | if (flot(i,j).and.(flot(i,j-1))) then |
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282 | flotmy(i,j)=.true. |
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283 | flgzmy(i,j)=.true. |
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284 | gzmy(i,j)=.false. |
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285 | betamy(i,j)=0. |
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286 | end if |
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287 | end do |
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288 | end do |
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289 | |
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290 | if (itracebug.eq.1) call tracebug(' apres criteres flot') |
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291 | |
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292 | if (itracebug.eq.1) write(num_tracebug,*) 'gzmx', gzmx(127,330) |
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293 | |
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294 | !--------- autres criteres |
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295 | |
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296 | ! points poses |
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297 | gzmx(:,:)=gzmx(:,:).and.(betamx(:,:).lt.beta_limgz) ! Pas de calcul pour les points |
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298 | gzmy(:,:)=gzmy(:,:).and.(betamy(:,:).lt.beta_limgz) ! au fort beta |
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299 | |
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300 | |
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301 | |
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302 | ! critere (lache) sur la temperature |
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303 | do j = 2, ny-1 |
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304 | do i =2, nx-1 |
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305 | |
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306 | ! test s'il y a un point tempere dans les environs |
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307 | test_Tx = any( ibase( i-1:i , j-1:j+1 ).gt.1) |
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308 | test_Ty = any( ibase( i-1:i+1 , j-1:j ).gt.1) |
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309 | |
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310 | ! test s'il y a un point low drag dans les environs |
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311 | test_beta_x = any( drag_centre( i-1:i , j-1:j+1 ) .lt. beta_forc_fleuve ) |
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312 | test_beta_y = any( drag_centre( i-1:i+1 , j-1:j ) .lt. beta_forc_fleuve ) |
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313 | |
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314 | ! critere pour gzmx |
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315 | |
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316 | ! Attention : les deux lignes suivants sont en commentaire pour voir l'effet |
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317 | |
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318 | ! gzmx(i,j) = gzmx(i,j) .and. (test_Tx.or.test_beta_x) |
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319 | ! gzmy(i,j) = gzmy(i,j) .and. (test_Ty.or.test_beta_y) |
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320 | |
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321 | end do |
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322 | end do |
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323 | |
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324 | |
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325 | if (itracebug.eq.1) call tracebug(' apres autres criteres ') |
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326 | if (itracebug.eq.1) write(num_tracebug,*) 'gzmx', gzmx(127,330) |
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327 | |
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328 | flgzmx(:,:) = flgzmx(:,:) .or. gzmx(:,:) |
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329 | flgzmy(:,:) = flgzmy(:,:) .or. gzmy(:,:) |
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330 | |
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331 | where ((.not.flotmx(:,:)).and.(.not.gzmx(:,:))) |
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332 | betamx(:,:) = beta_limgz |
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333 | end where |
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334 | |
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335 | where ((.not.flotmy(:,:)).and.(.not.gzmy(:,:))) |
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336 | betamy(:,:) = beta_limgz |
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337 | end where |
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338 | |
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339 | fleuvemx(:,:)=gzmx(:,:) |
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340 | fleuvemy(:,:)=gzmy(:,:) |
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341 | |
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342 | end subroutine gzm_beta_prescr |
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343 | |
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344 | |
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345 | !---------------------------------------------------------------------------------- |
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346 | ! Routines qui permettent des manip simples sur beta. |
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347 | |
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348 | |
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349 | !______________________________________________________________________________________ |
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350 | !>SUBROUTINE: beta_plateau_slope |
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351 | !! give value beta_limgz to places where slope is >1.e-2 |
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352 | !< |
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353 | |
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354 | subroutine beta_plateau_slope ! give value beta_limgz to places where slope is >1.e-2 |
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355 | |
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356 | call slope_surf |
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357 | |
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358 | where (abs(sdx(:,:)).gt.1.e-2) |
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359 | drag_mx(:,:) = beta_limgz |
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360 | end where |
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361 | |
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362 | where (abs(sdy(:,:)).gt.1.e-2) |
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363 | drag_my(:,:) = beta_limgz |
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364 | end where |
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365 | end subroutine beta_plateau_slope |
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366 | !______________________________________________________________________________________ |
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367 | !> SUBROUTINE beta_plateau_S |
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368 | !! give value beta_limgz to places where S > 2500 m |
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369 | !< |
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370 | subroutine beta_plateau_S ! give value beta_limgz to places where S > 2500 m |
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371 | |
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372 | where (S(:,:).gt.2500.) ! moyen simple de nettoyer l'interieur. WAIS pas touche |
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373 | drag_centre(:,:)=beta_limgz |
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374 | drag_mx(:,:)=beta_limgz |
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375 | drag_my(:,:)=beta_limgz |
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376 | end where |
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377 | end subroutine beta_plateau_S |
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378 | !______________________________________________________________________________________ |
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379 | !>SUBROUTINE: beta_min_value |
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380 | !! valeur mini que peut avoir beta (en Pa an m-1) |
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381 | !< |
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382 | |
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383 | subroutine beta_min_value(val_betamin) |
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384 | |
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385 | real :: val_betamin ! valeur mini que peut avoir beta (en Pa an m-1) |
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386 | |
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387 | drag_centre(:,:) = max(drag_centre(:,:),val_betamin) |
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388 | drag_mx(:,:) = max(drag_mx(:,:),val_betamin) |
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389 | drag_my(:,:) = max(drag_my(:,:),val_betamin) |
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390 | where(flot(:,:)) |
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391 | drag_centre(:,:) = 0. |
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392 | end where |
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393 | |
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394 | end subroutine beta_min_value |
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395 | !______________________________________________________________________________________ |
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396 | !>SUBROUTINE: beta_stag2c |
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397 | !! average the staggered values on central ones |
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398 | !< |
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399 | |
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400 | subroutine beta_stag2c(nxx,nyy,R_mx,R_my,R_centre) ! average the staggered values on central ones |
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401 | |
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402 | implicit none |
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403 | integer :: nxx,nyy ! dimension des tableaux |
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404 | real, dimension(nxx,nyy), intent(in) :: R_mx ! valeur du beta sur maille mx |
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405 | real, dimension(nxx,nyy), intent(in) :: R_my ! valeur du beta sur maille my |
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406 | real, dimension(nxx,nyy), intent(out) :: R_centre ! valeur du beta sur maille centree |
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407 | |
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408 | R_centre(:,:)=0. |
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409 | do j=2,ny-1 |
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410 | do i=2,nx-1 |
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411 | R_centre(i,j)= ((R_mx(i,j)+R_mx(i+1,j)) & |
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412 | + (R_my(i,j)+R_my(i,j+1)))*0.25 |
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413 | end do |
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414 | end do |
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415 | end subroutine beta_stag2c |
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416 | !______________________________________________________________________________________ |
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417 | !>SUBROUTINE: beta_c2stag_min |
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418 | !! redistribute central values on staggered grid |
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419 | !< |
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420 | |
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421 | subroutine beta_c2stag(nxx,nyy,R_mx,R_my,R_centre) ! redistribute central values on staggered grid |
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422 | |
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423 | implicit none |
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424 | integer :: nxx,nyy ! dimension des tableaux |
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425 | real, dimension(nxx,nyy), intent(out) :: R_mx ! valeur du beta sur maille mx |
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426 | real, dimension(nxx,nyy), intent(out) :: R_my ! valeur du beta sur maille my |
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427 | real, dimension(nxx,nyy), intent(in) :: R_centre ! valeur du beta sur maille centree |
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428 | |
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429 | do j=2,nyy |
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430 | do i=2,nxx |
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431 | R_mx(i,j)= (R_centre(i-1,j)+R_centre(i,j))*0.5 |
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432 | R_my(i,j)= (R_centre(i,j-1)+R_centre(i,j))*0.5 |
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433 | end do |
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434 | end do |
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435 | |
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436 | end subroutine beta_c2stag |
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437 | !______________________________________________________________________________________ |
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438 | !>SUBROUTINE: beta_c2stag_min |
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439 | !! redistribute central values on staggered grid |
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440 | !< |
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441 | |
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442 | subroutine beta_c2stag_min(nxx,nyy,R_mx,R_my,R_centre) ! redistribute central values on staggered grid |
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443 | |
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444 | implicit none |
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445 | integer :: nxx,nyy ! dimension des tableaux |
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446 | real, dimension(nxx,nyy), intent(inout):: R_mx ! valeur du beta sur maille mx |
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447 | real, dimension(nxx,nyy), intent(inout):: R_my ! valeur du beta sur maille my |
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448 | real, dimension(nxx,nyy), intent(in) :: R_centre ! valeur du beta sur maille centree |
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449 | |
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450 | do j=2,nyy |
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451 | do i=2,nxx |
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452 | R_mx(i,j)= min(R_mx(i,j),(R_centre(i-1,j)+R_centre(i,j))*0.5) |
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453 | R_my(i,j)= min(R_my(i,j),(R_centre(i,j-1)+R_centre(i,j))*0.5) |
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454 | end do |
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455 | end do |
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456 | |
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457 | end subroutine beta_c2stag_min |
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458 | !______________________________________________________________________________________ |
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459 | !>SUBROUTINE: make_gaussienne |
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460 | !! cree une matrice gaussienne normalisee a 1 |
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461 | !< |
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462 | |
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463 | subroutine make_gaussienne(n,sigma,M) |
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464 | |
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465 | implicit none |
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466 | integer,intent(in) :: n ! demi taille du tableau gaussienne |
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467 | real, intent(in) :: sigma ! sigma gaussienne exprime en dx |
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468 | real,dimension(-n:n,-n:n),intent(inout) :: M ! tableau gaussienne |
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469 | |
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470 | |
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471 | ! variables locales |
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472 | real :: dist2 ! distance au centre (au carre) |
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473 | real :: som ! pour calibration |
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474 | real :: sigma2 ! pour gaussienne |
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475 | |
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476 | som = 0. |
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477 | sigma2 = sigma * sigma * 2 |
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478 | do j = -n, n |
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479 | do i = -n, n |
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480 | dist2 = (i*i+j*j) |
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481 | M(i,j) = exp(-dist2/sigma2) |
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482 | som=som+M(i,j) |
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483 | end do |
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484 | end do |
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485 | |
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486 | M(:,:) = M(:,:) / som |
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487 | |
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488 | ! do j = -n, n |
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489 | ! write(6,'(5(f0.4,1x))') (M(i,j),i=-n,n) |
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490 | ! end do |
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491 | |
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492 | end subroutine make_gaussienne |
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493 | |
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494 | !______________________________________________________________________________________ |
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495 | !>SUBROUTINE: iter_gauss |
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496 | !! utilise hdot pour faire les iterations sur beta_centre |
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497 | !< |
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498 | subroutine iter_gauss(n,nxx,nyy,M,coef,beta_in,beta_out,Ecart) |
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499 | |
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500 | integer, intent(in) :: n ! taille matrice gaussienne |
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501 | integer, intent(in) :: nxx,nyy ! taille du domaine |
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502 | real,dimension(-n:n,-n:n),intent(in) :: M ! matrice gaussienne |
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503 | real, intent(in) :: coef ! coefficient multiplicateur |
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504 | real,dimension(nx,ny), intent(in) :: beta_in ! la valeur initiale |
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505 | real,dimension(nx,ny), intent(out) :: beta_out ! la valeur apres iteration |
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506 | real,dimension(nx,ny), intent(in) :: Ecart ! l'ecart a l'obs |
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507 | |
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508 | ! variables locales |
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509 | integer :: ii,jj |
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510 | |
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511 | do j= 1 + n, nyy - n |
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512 | do i = 1 + n, nxx - n |
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513 | beta_out(i,j) = beta_in(i,j) |
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514 | |
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515 | do jj = -n, n |
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516 | do ii = -n, n |
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517 | beta_out(i,j) = beta_out(i,j) + coef * M(ii,jj) * ecart(i+ii,j+jj) |
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518 | end do |
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519 | end do |
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520 | |
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521 | end do |
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522 | end do |
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523 | |
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524 | beta_out(:,:) = max (beta_out(:,:),0.) |
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525 | end subroutine iter_gauss |
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526 | |
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527 | end module dragging_prescr_beta |
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528 | |
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529 | !!$! add the nodes of topographical instability (on major nodes) |
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530 | ! a garder eventuellement pour runs instabilite |
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531 | !!$beta_file = trim(dirnameinp)//'sensib_H_Gael-15km.dat' |
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532 | !!$call lect_datfile(nx,ny,drag_instab_topo,1,beta_file) |
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533 | !!$ |
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534 | !!$where (drag_instab_topo(:,:).gt.0.) |
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535 | !!$ drag_centre(:,:)=min(drag_centre(:,:),400.) |
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536 | !!$endwhere |
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