1 | ! ================================================================================================================================= |
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2 | ! MODULE : grassland_fonctions |
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3 | ! |
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4 | ! CONTACT : orchidee-help _at_ ipsl.jussieu.fr |
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5 | ! |
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6 | ! LICENCE : IPSL (2006) |
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7 | ! This software is governed by the CeCILL licence see |
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8 | ! ORCHIDEE/ORCHIDEE_CeCILL.LIC |
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9 | ! |
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10 | !>\BRIEF This module defined basic aggregation functions used |
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11 | !! in grassland management module |
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12 | !! |
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13 | !!\n DESCRIPTION : None |
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14 | !! |
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15 | !! RECENT CHANGE(S) : None |
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16 | !! |
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17 | !! REFERENCE(S) : None |
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18 | !! |
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19 | !! \n |
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20 | !_ |
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21 | !================================================================================================================================ |
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22 | MODULE grassland_fonctions |
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23 | |
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24 | USE grassland_constantes |
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25 | USE constantes |
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26 | |
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27 | ! Used functions |
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28 | ! Euler_funct |
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29 | ! linreg_pasim |
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30 | |
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31 | IMPLICIT NONE |
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32 | |
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33 | PUBLIC :: Euler_funct |
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34 | |
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35 | INTEGER(i_std), SAVE :: emplacement |
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36 | ! permet de se souvenir du dernier emplacement dans l'interpolation |
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37 | |
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38 | CONTAINS |
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39 | |
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40 | !!!!!!!!!!!!!!!!!!!!!!!! |
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41 | !!!!!! EULER |
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42 | !!!!!!!!!!!!!!!!!!!!!!!! |
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43 | |
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44 | SUBROUTINE Euler_funct(npts, dt, dY, Y) |
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45 | ! Y(n+1) = Y(n) + h*F(tn,Y(n)) |
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46 | ! d'ou : |
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47 | ! Y = Yp + h*dY |
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48 | ! ou h = dt |
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49 | |
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50 | INTEGER(i_std), INTENT(in) :: npts |
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51 | REAL(R_std), INTENT(in) :: dt |
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52 | REAL(R_std), DIMENSION(npts), INTENT(in) :: dY |
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53 | ! result |
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54 | REAL(R_std), DIMENSION(npts), INTENT(inout) :: Y |
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55 | |
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56 | Y(:) = Y(:) + dt*dY(:) |
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57 | |
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58 | END SUBROUTINE Euler_funct |
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59 | |
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60 | |
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61 | SUBROUTINE Euler_X(npts, ncol, dt, dY, Y) |
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62 | ! matrix |
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63 | INTEGER(i_std), INTENT(in) :: npts |
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64 | INTEGER(i_std), INTENT(in) :: ncol ! number colonne of matrix |
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65 | REAL(R_std), INTENT(in) :: dt |
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66 | REAL(R_std), DIMENSION(npts, ncol) :: dY |
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67 | REAL(R_std), DIMENSION(npts, ncol) :: Y |
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68 | |
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69 | INTEGER(i_std) :: i |
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70 | |
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71 | DO i=1, ncol |
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72 | Y(:,i) = Y(:,i) + dt*dY(:,i) |
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73 | END DO |
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74 | |
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75 | END SUBROUTINE Euler_X |
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76 | |
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77 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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78 | !!!!!!!! FTSIGM |
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79 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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80 | |
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81 | SUBROUTINE fTsigm(npts, Tform, & |
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82 | T0form, T0pform, qftform, & |
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83 | fTsigmform) |
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84 | |
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85 | ! functiong of temperature equation 3.11 |
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86 | INTEGER(i_std), INTENT(in) :: npts |
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87 | REAL(R_std), DIMENSION(npts), INTENT(in) :: Tform |
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88 | REAL(R_std), INTENT(in) :: T0form |
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89 | REAL(R_std), INTENT(in) :: T0pform |
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90 | REAL(R_std), INTENT(in) :: qftform |
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91 | REAL(r_std), DIMENSION(npts), INTENT(out) :: fTsigmform |
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92 | |
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93 | INTEGER(i_std) :: i |
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94 | |
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95 | DO i=1, npts |
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96 | IF ((Tform(i) .GT. T0form) .AND. (Tform(i) .LT. T0pform)) THEN |
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97 | fTsigmform(i) = ((Tform(i) - T0form)**qftform)*(T0pform - Tform(i))/ & |
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98 | (((293.0 - T0form)**qftform)*(T0pform - 293.0)) |
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99 | ELSE |
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100 | fTsigmform(i) = 0.0 |
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101 | ENDIF |
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102 | ENDDO |
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103 | |
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104 | END SUBROUTINE fTsigm |
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105 | |
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106 | |
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107 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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108 | !!!!!!!!!!!!!!!! INTERPOLATION EXTRAPOLATION |
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109 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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110 | |
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111 | SUBROUTINE interpolation_extrapolation (npts, nbpoints, table, absc, nouv_annee, resultat) |
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112 | |
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113 | ! Principe suivi : cette fonction n'est appelée que pour faire l'interpolation |
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114 | !sur les fichiers météo (ta, ea, pa, iatmtot, nh3a, co2, u). |
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115 | ! Elle est appelée à chaque pas de temps. Il faut faire deux remarques : |
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116 | ! 1)- pour tous les points de simulations l'interpolation se fait dans |
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117 | !le même intervalle de temps pour un fichier. |
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118 | ! 2)- Tous les fichiers météo étant construit sur le même format, |
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119 | !ils font tous leur interpolation dans le même intervalle pour un pas de temps donné. |
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120 | ! Nous allons donc conserver en mémoire le dernier emplacement |
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121 | !(dans quel intervalle) d'interpolation, en sachant que la suivante sera soit au même |
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122 | !endroit soit dans l'intervalle suivant. |
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123 | |
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124 | INTEGER(i_std), INTENT(in) :: npts |
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125 | INTEGER(i_std), INTENT(in) :: nbpoints |
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126 | REAL(r_std), DIMENSION(npts,2,nbpoints), INTENT(in) :: table |
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127 | REAL(r_std), INTENT(in) :: absc |
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128 | LOGICAL, intent(in) :: nouv_annee |
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129 | REAL(r_std), DIMENSION(npts), INTENT(out) :: resultat |
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130 | |
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131 | INTEGER(i_std) :: i |
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132 | INTEGER(i_std) :: j |
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133 | LOGICAL, DIMENSION(npts) :: calcul |
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134 | |
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135 | calcul(:) = .FALSE. |
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136 | |
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137 | ! remarquons que tous les tableaux appelant cette fonction sont au même niveau pour l'interpolation |
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138 | ! remarquons que pour i=1,npts tous les points sont interpolés au même endroit |
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139 | |
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140 | IF (nouv_annee) THEN ! if it's the firts call during a new_year |
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141 | |
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142 | ! table has npts line, but all points are the make on the same model, |
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143 | ! so we search on point 1 and it's the same on all other points |
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144 | IF ((absc .GE. table(1,1,1)) .AND. (absc .LE. table(1,1,nbpoints))) THEN |
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145 | |
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146 | ! if table (1,2,i+1) = -999 it's the end of the array table |
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147 | DO i=1,nbpoints-1 |
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148 | IF ((absc .GE. table(1,1,i)) .AND. (absc .LE. table(1,1,i+1)) .AND.& |
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149 | (table(1,2,i+1).NE. -999.0)) THEN |
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150 | |
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151 | calcul(:) = .TRUE. |
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152 | resultat(:) = table(:,2,i)*(table(:,1,i+1)-absc)/(table(:,1,i+1)-table(:,1,i)) + & |
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153 | table(:,2,i+1)*(absc - table(:,1,i))/(table(:,1,i+1)-table(:,1,i)) |
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154 | emplacement = i |
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155 | |
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156 | ELSE IF ((table(1,2,i+1).EQ. -999.0).AND. (calcul(1) .EQ. .FALSE.)) THEN |
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157 | calcul(:) = .TRUE. |
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158 | resultat(:) = table(:,2,i-1)*(table(:,1,i)-absc)/ & |
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159 | (table(:,1,i)-table(:,1,i-1)) + & |
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160 | table(:,2,i)*(absc - table(:,1,i-1))/& |
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161 | (table(:,1,i)-table(:,1,i-1)) |
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162 | emplacement = i |
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163 | |
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164 | END IF |
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165 | END DO |
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166 | ELSE |
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167 | IF (absc .LT. table(1,1,1)) THEN |
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168 | |
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169 | calcul(:) = .TRUE. |
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170 | resultat(:) = table(:,2,1)*(table(:,1,2)-absc)/(table(:,1,2)-table(:,1,1)) + & |
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171 | table(:,2,2)*(absc - table(:,1,1))/(table(:,1,2)-table(:,1,1)) |
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172 | emplacement = 0 |
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173 | |
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174 | ELSE |
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175 | |
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176 | calcul(:) = .TRUE. |
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177 | resultat(:) = table(:,2,nbpoints-1)*(table(:,1,nbpoints)-absc)/ & |
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178 | (table(:,1,nbpoints)-table(:,1,nbpoints-1)) + & |
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179 | table(:,2,nbpoints)*(absc - table(:,1,nbpoints-1))/& |
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180 | (table(:,1,nbpoints)-table(:,1,nbpoints-1)) |
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181 | emplacement = nbpoints |
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182 | |
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183 | END IF |
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184 | END IF |
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185 | ELSE ! si ce n'est pas le premier appel de l'année |
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186 | ! dans ce cas nous connaissons le dernier emplacement utilisé. Nous repartons de là |
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187 | IF ((emplacement .NE. 0) .AND. (emplacement .NE. nbpoints)) THEN |
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188 | IF ((absc .GE. table(1,1,emplacement)) .AND. (absc .LE. table(1,1,emplacement+1)) .AND.& |
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189 | (table(1,2,emplacement+1).NE. -999.0)) THEN |
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190 | ! emplacement ne change pas |
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191 | |
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192 | calcul(:) = .TRUE. |
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193 | resultat(:) = & |
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194 | table(:,2,emplacement)*(table(:,1,emplacement+1)-absc)/& |
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195 | (table(:,1,emplacement+1)-table(:,1,emplacement)) + & |
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196 | table(:,2,emplacement+1)*(absc - table(:,1,emplacement))/& |
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197 | (table(:,1,emplacement+1)-table(:,1,emplacement)) |
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198 | |
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199 | |
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200 | ELSE IF ((table(1,2,emplacement+1).EQ. -999.0).AND. (calcul(1) .EQ. .FALSE.)) THEN |
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201 | !emplacement ne change pas |
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202 | calcul(:) = .TRUE. |
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203 | resultat(:) = table(:,2,emplacement-1)*(table(:,1,emplacement)-absc)/ & |
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204 | (table(:,1,emplacement)-table(:,1,emplacement-1)) + & |
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205 | table(:,2,emplacement)*(absc - table(:,1,emplacement-1))/& |
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206 | (table(:,1,emplacement)-table(:,1,emplacement-1)) |
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207 | |
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208 | resultat(:) = table(:,2,emplacement) |
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209 | |
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210 | ELSE IF (emplacement .NE. nbpoints-1) THEN |
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211 | ! dans ce cas là l'interpolation est dans la case suivante |
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212 | emplacement = emplacement + 1 |
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213 | IF ((absc .GE. table(1,1,emplacement)) .AND. (absc .LE. table(1,1,emplacement+1)) .AND.& |
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214 | (table(1,2,emplacement+1).NE. -999.0)) THEN |
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215 | ! emplacement ne change pas |
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216 | calcul(:) = .TRUE. |
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217 | resultat(:) = & |
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218 | table(:,2,emplacement)*(table(:,1,emplacement+1)-absc)/& |
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219 | (table(:,1,emplacement+1)-table(:,1,emplacement)) + & |
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220 | table(:,2,emplacement+1)*(absc - table(:,1,emplacement))/& |
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221 | (table(:,1,emplacement+1)-table(:,1,emplacement)) |
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222 | |
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223 | |
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224 | ELSE IF ((table(1,2,emplacement+1).EQ. -999.0).AND. (calcul(1) .EQ. .FALSE.)) THEN |
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225 | !emplacement ne change pas |
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226 | calcul(:) = .TRUE. |
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227 | resultat(:) = table(:,2,emplacement-1)*(table(:,1,emplacement)-absc)/ & |
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228 | (table(:,1,emplacement)-table(:,1,emplacement-1)) + & |
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229 | table(:,2,emplacement)*(absc - table(:,1,emplacement-1))/& |
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230 | (table(:,1,emplacement)-table(:,1,emplacement-1)) |
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231 | |
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232 | resultat(:) = table(:,2,emplacement) |
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233 | |
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234 | END IF |
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235 | |
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236 | ELSE IF (emplacement .EQ. nbpoints -1) then |
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237 | emplacement = emplacement + 1 |
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238 | calcul(:) = .TRUE. |
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239 | resultat(:) = table(:,2,nbpoints-1)*(table(:,1,nbpoints)-absc)/ & |
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240 | (table(:,1,nbpoints)-table(:,1,nbpoints-1)) + & |
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241 | table(:,2,nbpoints)*(absc - table(:,1,nbpoints-1))/& |
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242 | (table(:,1,nbpoints)-table(:,1,nbpoints-1)) |
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243 | emplacement = nbpoints |
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244 | |
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245 | |
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246 | END IF |
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247 | ELSE IF (emplacement .EQ. 0) THEN |
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248 | IF (absc .LT. table(1,1,1) ) THEN |
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249 | ! emplacement ne change pas |
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250 | calcul(:) = .TRUE. |
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251 | resultat(:) = table(:,2,1)*(table(:,1,2)-absc)/(table(:,1,2)-table(:,1,1)) + & |
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252 | table(:,2,2)*(absc - table(:,1,1))/(table(:,1,2)-table(:,1,1)) |
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253 | emplacement = 0 |
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254 | ELSE |
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255 | emplacement = 1 |
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256 | calcul(:) = .TRUE. |
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257 | resultat(:) = & |
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258 | table(:,2,emplacement)*(table(:,1,emplacement+1)-absc)/& |
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259 | (table(:,1,emplacement+1)-table(:,1,emplacement)) + & |
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260 | table(:,2,emplacement+1)*(absc - table(:,1,emplacement))/& |
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261 | (table(:,1,emplacement+1)-table(:,1,emplacement)) |
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262 | END IF |
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263 | |
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264 | ELSE IF (emplacement .EQ. nbpoints)THEN |
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265 | |
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266 | calcul(:) = .TRUE. |
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267 | resultat(:) = table(:,2,nbpoints-1)*(table(:,1,nbpoints)-absc)/ & |
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268 | (table(:,1,nbpoints)-table(:,1,nbpoints-1)) + & |
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269 | table(:,2,nbpoints)*(absc - table(:,1,nbpoints-1))/& |
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270 | (table(:,1,nbpoints)-table(:,1,nbpoints-1)) |
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271 | emplacement = nbpoints |
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272 | ELSE |
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273 | STOP 'erreur avec l''interpolation' |
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274 | |
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275 | END IF |
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276 | |
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277 | ENDIF |
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278 | |
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279 | END SUBROUTINE interpolation_extrapolation |
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280 | |
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281 | !!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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282 | !!!!!! PM |
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283 | !!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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284 | |
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285 | SUBROUTINE Pm(npts, Pmform,alphaform,Tlform, Co2curr, pm20, pmn, pmc) |
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286 | |
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287 | INTEGER(i_std), INTENT(in) :: npts |
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288 | REAL(R_std), DIMENSION(npts), INTENT(in) :: pm20 |
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289 | REAL(R_std), DIMENSION(npts), INTENT(in) :: pmc |
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290 | REAL(R_std), DIMENSION(npts), INTENT(in) :: pmn |
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291 | REAL(R_std), DIMENSION(npts), INTENT(out) :: Pmform |
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292 | REAL(R_std), DIMENSION(npts), INTENT(out) :: alphaform |
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293 | REAL(R_std), DIMENSION(npts), INTENT(in) :: Tlform |
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294 | REAL(R_std), DIMENSION(npts), INTENT(in) :: Co2curr |
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295 | |
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296 | |
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297 | REAL(R_std) :: PmT0p |
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298 | REAL(R_std), DIMENSION(npts) :: PmT |
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299 | REAL(R_std), DIMENSION(npts) :: Vcmax |
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300 | REAL(R_std), DIMENSION(npts) :: Vomax |
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301 | REAL(R_std), DIMENSION(npts) :: Kc |
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302 | REAL(R_std), DIMENSION(npts) :: Ko |
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303 | REAL(R_std), DIMENSION(npts) :: Oi |
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304 | REAL(R_std), DIMENSION(npts) :: Ci |
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305 | REAL(R_std), DIMENSION(npts) :: Ci350 |
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306 | REAL(R_std), DIMENSION(npts) :: GAMMAstar |
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307 | REAL(R_std), DIMENSION(npts) :: Amax |
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308 | REAL(R_std), DIMENSION(npts) :: Amax350 |
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309 | REAL(R_std), DIMENSION(npts) :: PmCO2 |
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310 | REAL(R_std), DIMENSION(npts) :: Eps |
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311 | REAL(R_std), DIMENSION(npts) :: Eps350 |
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312 | REAL(R_std), DIMENSION(npts) :: alphaCO2 |
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313 | REAL(R_std), DIMENSION(npts) :: Tlcel |
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314 | |
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315 | REAL(R_std), PARAMETER :: pmqft = 1.5 |
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316 | REAL(R_std), PARAMETER :: pmtopt = 303.0 |
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317 | REAL(R_std), PARAMETER :: pmt0 = 273.0 |
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318 | |
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319 | |
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320 | |
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321 | |
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322 | !Abhaengigkeit von Klimaaenderung (CO2 & T) |
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323 | |
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324 | |
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325 | Vcmax = 98.0*EXP(68000.0*(Tlform-298.15)/ (298.15*Tlform*Rgas))*SQRT(Tlform/298.15) |
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326 | Vomax = 0.21*Vcmax |
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327 | Kc = 460.0*EXP(65800*(Tlform-298.15)/(298.15*Tlform*Rgas))*SQRT(Tlform/298.15) |
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328 | Ko = 330.0*EXP(1400*(Tlform-298.15)/(298.15*Tlform*Rgas))*SQRT(Tlform/298.15) |
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329 | Tlcel = Tlform - 273.15 |
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330 | Oi = 210*(0.047 - 0.0013087*Tlcel + 0.000025603*Tlcel**2 - 0.00000021441*Tlcel**3)/0.026934 |
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331 | Ci = 0.7*CO2curr*((1.6740 - 0.061294*Tlcel + 0.0011688*Tlcel**2 - 0.0000088741*Tlcel**3)/0.73547) |
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332 | Ci350 = 0.7*350.0*((1.6740 - 0.061294*Tlcel + 0.0011688*Tlcel**2 - 0.0000088741*Tlcel**3)/0.73547) |
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333 | GAMMAstar = 0.5*Vomax*Kc*Oi/(Vcmax*Ko) |
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334 | Amax = (Ci - GAMMAstar)*Vcmax/(Ci + Kc*(1.0 + Oi/Ko)) |
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335 | Amax350 = (Ci350 - GAMMAstar)*Vcmax/(Ci350 + Kc*(1.0 + Oi/Ko)) |
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336 | PmCO2 = Vcmaxadap*Amax/Amax350 |
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337 | Eps = (ABSORvl/2.1)*(Ci - GAMMAstar)/ (4.5*Ci + 10.5*GAMMAstar) |
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338 | Eps350 = (ABSORvl/2.1)*(Ci350 - GAMMAstar)/ (4.5*Ci350 + 10.5*GAMMAstar) |
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339 | alphaCO2 = Eps/Eps350 |
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340 | |
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341 | alphaform = alpha350*alphaCO2 |
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342 | |
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343 | !Abhaengigkeit von der Temperatur |
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344 | |
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345 | PmT0p = ((1.0 + Pmqft)*PmTopt - PmT0)/Pmqft |
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346 | CALL fTsigm(npts, Tlform, PmT0, PmT0p, Pmqft, PmT) |
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347 | |
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348 | Pmform = Pm20*PmN*PmC*PmCO2*PmT |
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349 | |
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350 | END SUBROUTINE Pm |
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351 | |
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352 | |
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353 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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354 | ! Fonctions calculant es et s : la pression de vapeur à saturation |
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355 | ! et sa dérivée |
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356 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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357 | |
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358 | |
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359 | SUBROUTINE es_fonct(npts,temp, resultat) |
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360 | |
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361 | INTEGER(i_std), INTENT(in) :: npts |
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362 | REAL(r_std), DIMENSION(npts), INTENT(in) :: temp |
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363 | REAL(r_std), DIMENSION(npts), INTENT(out) :: resultat |
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364 | |
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365 | |
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366 | resultat = 0.6112*EXP(17.67*(temp/(temp+246.2))) |
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367 | |
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368 | END SUBROUTINE es_fonct |
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369 | |
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370 | |
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371 | SUBROUTINE s_fonct(npts,temp, resultat) |
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372 | |
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373 | INTEGER(i_std), INTENT(in) :: npts |
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374 | REAL(r_std), DIMENSION(npts), INTENT(in) :: temp |
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375 | REAL(r_std), DIMENSION(npts), INTENT(out) :: resultat |
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376 | |
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377 | REAL(r_std), DIMENSION(npts) :: es_cal |
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378 | |
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379 | CALL es_fonct(npts, temp, es_cal) |
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380 | resultat = es_cal*17.67*246.2/(temp+246.2)**2 |
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381 | END SUBROUTINE s_fonct |
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382 | |
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383 | ! Subroutine linreg_pasim for autogestion |
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384 | |
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385 | SUBROUTINE linreg_pasim( npts, MaxElems, xx, yy, nDataPairs, misVal, & |
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386 | muX, muY, sigX, sigY, a, b, cor ) |
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387 | |
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388 | INTEGER(i_std), INTENT(in) :: npts |
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389 | INTEGER(i_std), INTENT(in) :: MaxElems |
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390 | REAL(r_std), DIMENSION(npts,MaxElems), INTENT(in) :: xx |
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391 | ! IN :x-data |
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392 | REAL(r_std), DIMENSION(npts,MaxElems), INTENT(in) :: yy |
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393 | ! IN :y-data |
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394 | INTEGER(i_std), INTENT(in) :: nDataPairs |
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395 | ! IN : number o valid x-y pairs |
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396 | REAL(r_std), INTENT(in) :: misVal |
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397 | ! IN :missing value |
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398 | REAL(r_std), DIMENSION(npts), INTENT(out) :: muX, muY |
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399 | ! OUT: meanof x and y |
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400 | REAL(r_std), DIMENSION(npts), INTENT(out) :: sigX, sigY |
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401 | ! OUT:standard deviation of x and y |
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402 | REAL(r_std), DIMENSION(npts), INTENT(out) :: a, b |
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403 | ! OUT:parameters of least-square |
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404 | ! fit y=a*x+b, |
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405 | REAL(r_std), DIMENSION(npts), INTENT(out) :: cor |
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406 | ! OUT:correlation between x and y |
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407 | |
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408 | INTEGER(i_std) , DIMENSION(npts) :: nn |
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409 | INTEGER(i_std) :: ii, i |
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410 | REAL(r_std), DIMENSION(npts) :: sxy |
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411 | |
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412 | |
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413 | ! initialize variables |
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414 | nn = 0 |
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415 | muX = 0.0 |
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416 | muY = 0.0 |
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417 | sigX = 0.0 |
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418 | sigY = 0.0 |
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419 | sxy = 0.0 |
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420 | |
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421 | DO ii=1,nDataPairs |
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422 | |
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423 | WHERE ((xx(:,ii).NE.misVal).AND.(yy(:,ii).NE.misVal)) |
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424 | nn(:) = nn(:) + 1 |
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425 | muX(:) = muX(:) + xx(:,ii) |
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426 | muY(:) = muY(:) + yy(:,ii) |
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427 | sigX(:) = sigX(:) + xx(:,ii)*xx(:,ii) |
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428 | sigY(:) = sigY(:) + yy(:,ii)*yy(:,ii) |
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429 | END WHERE |
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430 | |
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431 | END DO |
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432 | DO i=1,npts |
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433 | IF (nn(i) .GT. 1) THEN |
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434 | muX(i) = muX(i)/nn(i) |
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435 | muY(i) = muY(i)/nn(i) |
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436 | sigX(i) = sigX(i)-nn(i)*muX(i)*muX(i) |
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437 | sigY(i) = sigY(i)-nn(i)*muY(i)*muY(i) |
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438 | |
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439 | IF (sigX(i) .LT. 0.0) sigX(i) = 0.0 |
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440 | IF (sigY(i) .LT. 0.0) sigY(i) = 0.0 |
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441 | |
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442 | DO ii=1,nDataPairs |
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443 | IF ((xx(i,ii).NE.misVal) .AND. (yy(i,ii) .NE. misVal)) THEN |
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444 | sxy(i) = sxy(i)+(xx(i,ii)-muX(i))*(yy(i,ii)-muY(i)) |
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445 | END IF |
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446 | END DO |
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447 | |
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448 | IF ((sigX(i).GT.0.0).AND.(sigY(i).GT.0.0)) THEN |
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449 | a(i) = sxy(i)/sigX(i) |
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450 | b(i) = muY(i) - a(i)*muX(i) |
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451 | cor(i) = sxy(i)/SQRT(sigX(i)*sigY(i)) |
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452 | ELSE |
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453 | a(i) = misVal |
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454 | b(i) = misVal |
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455 | cor(i) = misVal |
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456 | END IF |
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457 | |
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458 | sigX(i) = SQRT(sigX(i)/REAL(nn(i)-1)) |
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459 | sigY(i) = SQRT(sigY(i)/REAL(nn(i)-1)) |
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460 | |
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461 | ELSE |
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462 | |
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463 | muX(i) = misVal |
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464 | muY(i) = misVal |
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465 | sigX(i) = misVal |
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466 | sigY(i) = misVal |
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467 | a(i) = misVal |
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468 | b(i) = misVal |
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469 | cor(i) = misVal |
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470 | |
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471 | END IF |
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472 | END DO |
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473 | |
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474 | |
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475 | END SUBROUTINE linreg_pasim ! LinReg |
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476 | |
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477 | END MODULE grassland_fonctions |
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478 | |
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479 | |
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480 | |
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481 | |
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482 | |
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483 | |
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484 | |
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