1 | MODULE lmdz_surf_wind |
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2 | CONTAINS |
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3 | |
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4 | SUBROUTINE surf_wind(klon,nsrfwnd,zu10m,zv10m,sigmaw,cstar,ustar,wstar,wind10ms,probu) |
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5 | |
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6 | USE lmdz_surf_wind_ini, ONLY : iflag_surf_wind |
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7 | |
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8 | IMPLICIT NONE |
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9 | INTEGER, INTENT(IN) :: nsrfwnd, klon |
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10 | REAL, DIMENSION(klon), INTENT(IN) :: zu10m, zv10m |
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11 | REAL, DIMENSION(klon), INTENT(IN) :: cstar |
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12 | REAL, DIMENSION(klon), INTENT(IN) :: sigmaw |
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13 | REAL, DIMENSION(klon), INTENT(IN) :: ustar, wstar |
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14 | REAL, DIMENSION(klon,nsrfwnd), INTENT(OUT) :: wind10ms, probu |
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15 | |
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16 | |
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17 | REAL, DIMENSION(klon,nsrfwnd) :: sigma_th, sigma_wk |
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18 | REAL, DIMENSION(klon,nsrfwnd) :: xp, yp, zz |
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19 | REAL, DIMENSION(klon,nsrfwnd) :: vwx, vwy, vw |
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20 | REAL, DIMENSION(klon,nsrfwnd) :: vtx, vty |
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21 | REAL, DIMENSION(klon,nsrfwnd) :: windx, windy, wind |
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22 | REAL, DIMENSION(klon) :: ubwk, vbwk ! ubwk et vbwk sont les vitesses moyennes dans les poches |
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23 | REAL, DIMENSION(klon) :: weilambda, U10mMOD |
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24 | |
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25 | INTEGER :: nwb |
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26 | INTEGER :: i, nmc, kwb |
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27 | REAL :: pi, pdfu |
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28 | REAL :: auxreal, kref |
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29 | REAL :: ray, ray2, theta,rr, xx, yy |
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30 | REAL :: ktwk, ktth, kzth |
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31 | |
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32 | print*,'LLLLLLLLLLLLLLLLLLLLL nsrfwnd=',nsrfwnd |
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33 | pi=2.*acos(0.) |
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34 | ray=7000. |
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35 | ktwk=0.5 |
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36 | ktth=2. |
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37 | kzth=1. |
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38 | kref=3 |
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39 | nwb=nsrfwnd |
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40 | |
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41 | ubwk(klon) = zu10m(klon) |
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42 | vbwk(klon) = zv10m(klon) |
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43 | |
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44 | DO i=1,klon |
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45 | U10mMOD(i)=sqrt(zu10m(i)*zu10m(i)+zv10m(i)*zv10m(i)) |
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46 | ENDDO |
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47 | |
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48 | ! a enlever |
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49 | !call histogram0(0., 20., nbin, hist) |
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50 | !call histogram0(-20., 20., nbin1, histx) |
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51 | !call histogram0(-20., 20., nbin1, histy) |
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52 | ! Utilisation du vent moyen dans la maille |
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53 | IF (iflag_surf_wind == 0) THEN |
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54 | !U10mMOD=sqrt(zu10m(i)*zu10m(i)+zv10m(i)*zv10m(i)) |
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55 | IF (nsrfwnd /= 1 ) THEN |
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56 | STOP 'Si iflag_surf_wind=0, nsrfwnd=1' |
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57 | ENDIF |
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58 | DO i=1,klon |
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59 | wind10ms(i,1)=U10mMOD(i) |
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60 | probu(i,1)=1. |
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61 | ENDDO |
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62 | |
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63 | !----------------------------------------------------------------------------- |
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64 | ELSE IF (iflag_surf_wind == 1) THEN ! Weibull |
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65 | !----------------------------------------------------------------------------- |
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66 | |
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67 | DO i=1, klon |
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68 | DO nmc=1, nsrfwnd |
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69 | ! Utilisation de la distribution de weibull |
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70 | !U10mMOD=sqrt(zu10m(i)*zu10m(i)+zv10m(i)*zv10m(i)) |
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71 | auxreal=1.+1./kref |
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72 | weilambda(i) = U10mMOD(i)/exp(auxreal*log(auxreal)-auxreal & |
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73 | - 0.5*log(auxreal/(2.*pi))+1./(12.*auxreal) & |
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74 | -1./(360.*(auxreal**3.))+1./(1260.*(auxreal**5.))) |
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75 | kwb=nmc |
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76 | wind10ms(i,kwb)=kwb*2.*U10mMOD(i)/nwb |
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77 | ! pdfu=(kref/U10mMOD(i))*(wind10ms(kwb)/U10mMOD(i))**(kref-1) & |
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78 | ! *exp(-(wind10ms(kwb)/U10mMOD(i))**kref) |
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79 | pdfu=(kref/weilambda(i))*(wind10ms(i,kwb)/weilambda(i))**(kref-1) & |
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80 | *exp(-(wind10ms(i,kwb)/weilambda(i))**kref) |
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81 | ! !print *,'JEdbg U10mMOD(i) weilambda ',U10mMOD(i),weilambda |
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82 | !JE20141205>> |
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83 | probu(i,kwb)=pdfu*2.*U10mMOD(i)/nwb |
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84 | ENDDO |
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85 | ENDDO |
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86 | |
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87 | !----------------------------------------------------------------------------- |
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88 | ELSE ! Monte Carlo |
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89 | !----------------------------------------------------------------------------- |
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90 | |
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91 | DO i=1, klon |
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92 | DO nmc=1, nsrfwnd |
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93 | ! Utilisation de la distribution du vent a l interieur et a l exterieur des poches |
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94 | call Random_number(zz) ! tirage uniforme entre 0 et 1. |
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95 | IF (ALL(zz <= sigmaw(klon))) THEN ! quand on est a l interieur de la poche |
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96 | |
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97 | call Random_number(xx) |
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98 | ray2=xx*ray**2 |
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99 | call Random_number(yy) |
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100 | theta=yy*2.*pi |
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101 | rr=sqrt(ray2) |
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102 | xp(i,nmc)=rr*cos(theta) |
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103 | yp(i,nmc)=rr*sin(theta) |
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104 | |
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105 | |
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106 | ! ENDIFle vent dans la poche = le module du vent moyen dans la poche + un vent radial |
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107 | vwx(i,nmc) = ubwk(i) + xp(i,nmc)*cstar(i)/ray |
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108 | vwy(i,nmc) = vbwk(i) + yp(i,nmc)*cstar(i)/ray |
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109 | vw(i,nmc) = sqrt(vwx(i,nmc)**2 + vwy(i,nmc)**2) |
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110 | |
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111 | ! On relie la variance au module du vent au carree (sigma ^ 2 = k || v || ^ 2) |
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112 | sigma_wk(i,nmc) = ktwk*(vw(i,nmc)) |
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113 | |
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114 | ! tirage du vent turbulent vt |
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115 | call randong(xx,yy,pi) |
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116 | vtx(i,nmc) = sigma_wk(i,nmc)*xx |
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117 | vty(i,nmc) = sigma_wk(i,nmc)*yy |
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118 | |
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119 | ! vent total = vent dans la poche (vw) + le vent turbulent(vt) |
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120 | windx(i,nmc) = vwx(i,nmc) + vtx(i,nmc) |
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121 | windy(i,nmc) = vwy(i,nmc) + vty(i,nmc) |
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122 | wind(i,nmc) = sqrt(windx(i,nmc)**2 + windy(i,nmc)**2) |
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123 | wind10ms(i,nmc) = wind(i,nmc) |
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124 | probu(i,nmc) = wind(i,nmc)/nsrfwnd |
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125 | |
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126 | ELSE |
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127 | ! le vent en dehors des poches est donne par le vent moyen |
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128 | !vwx(klon) = zu10m(klon) |
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129 | !vwy(klon) = zv10m(klon) |
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130 | !vw(klon) = sqrt(vwx(klon)**2 + vwy(klon)**2) |
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131 | |
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132 | !sigma_th(i,nmc) = sqrt((ktth*ustar(i))**2 + (kzth*wstar(i))**2) ! a voir |
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133 | sigma_th(i,nmc) = 1.8 |
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134 | |
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135 | ! tirage du vent turbulent vt |
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136 | call randong(xx,yy,pi) |
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137 | vtx(i,nmc) = sigma_th(i,nmc)*xx |
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138 | vty(i,nmc) = sigma_th(i,nmc)*yy |
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139 | |
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140 | ! vent total en dehors des poches = le vent moyen + le vent turbulent(vt) |
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141 | windx(i,nmc) = zu10m(i) + vtx(i,nmc) |
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142 | windy(i,nmc) = zv10m(i) + vty(i,nmc) |
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143 | wind(i,nmc) = sqrt(windx(i,nmc)**2 + windy(i,nmc)**2) |
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144 | wind10ms(i,nmc) = wind(i,nmc) |
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145 | probu(i,nmc) = wind(i,nmc)/nsrfwnd |
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146 | ! print*, 'wind10ms', wind10ms(i,nmc) |
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147 | ENDIF |
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148 | ! enlver |
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149 | !call histogram(wind(i,nmc), 0., 20., nbin, hist) |
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150 | !call histogram(windx(i,nmc), -20., 20., nbin1, histx) |
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151 | !call histogram(windy(i,nmc), -20., 20., nbin1, histy) |
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152 | ENDDO |
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153 | ENDDO |
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154 | ENDIF |
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155 | ! a enlever |
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156 | !Do i=1,nbin |
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157 | ! write(10,*) hist(1,i), hist(2,i) |
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158 | !enddo |
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159 | |
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160 | !Do i=1,nbin1 |
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161 | ! write(11,*) histx(1,i), histx(2,i) |
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162 | !enddo |
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163 | |
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164 | !Do i=1,nbin1 |
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165 | ! write(12,*) histx(1,i), histy(2,i) |
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166 | !enddo |
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167 | |
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168 | RETURN |
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169 | END SUBROUTINE surf_wind |
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170 | |
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171 | SUBROUTINE randong(zzz1,zzz2,pi) ! tirage sur une gaussienne selon BOX-MULLER |
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172 | |
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173 | implicit none |
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174 | |
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175 | real zzz1, zzz2 |
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176 | real u1, u2 |
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177 | real pi |
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178 | |
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179 | ! tirage entre 0 et 1 selon la loi uniforme |
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180 | call RANDOM_NUMBER(u1) |
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181 | call RANDOM_NUMBER(u2) |
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182 | |
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183 | ! transformation de u1 et u2 en une distribution gaussienne centree reduite sur x et y |
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184 | zzz1=sqrt(-2*log(u1))*cos(2.*pi*u2) |
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185 | zzz2=sqrt(-2*log(u1))*sin(2.*pi*u2) |
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186 | |
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187 | RETURN |
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188 | END SUBROUTINE randong |
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189 | END MODULE lmdz_surf_wind |
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