1 | MODULE disvert_strato_mod |
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2 | USE icosa |
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3 | USE mpipara |
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4 | USE getin_mod |
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5 | USE earth_const |
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6 | IMPLICIT NONE |
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7 | PRIVATE |
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8 | |
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9 | REAL(rstd), SAVE, ALLOCATABLE,TARGET :: ap(:) |
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10 | !$OMP THREADPRIVATE(ap) |
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11 | REAL(rstd), SAVE, ALLOCATABLE,TARGET :: bp(:) |
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12 | !$OMP THREADPRIVATE(bp) |
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13 | REAL(rstd), SAVE, ALLOCATABLE,TARGET :: presnivs(:) |
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14 | !$OMP THREADPRIVATE(presnivs) |
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15 | |
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16 | PUBLIC :: ap,bp,presnivs, init_disvert, init_disvert_strato_custom |
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17 | |
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18 | CONTAINS |
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19 | |
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20 | SUBROUTINE init_disvert |
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21 | REAL(rstd) :: dsigmin, snorm, x, dsig(llm), sig(llm+1) |
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22 | INTEGER :: l |
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23 | |
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24 | ALLOCATE(ap(llm+1)) |
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25 | ALLOCATE(bp(llm+1)) |
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26 | ALLOCATE(presnivs(llm)) |
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27 | |
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28 | dsigmin=1.0 ! Should be 0.3 for CMIP5 |
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29 | CALL getin('disvert_dsigmin', dsigmin) |
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30 | |
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31 | snorm = 0. |
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32 | DO l = 1, llm |
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33 | x = Pi*(l-0.5)/(llm+1) |
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34 | dsig(l) = (dsigmin + 7.0 * SIN(x)**2) * (0.5* (1.-tanh( (x-Pi/2)/(Pi/2) ) ))**2 |
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35 | snorm = snorm + dsig(l) |
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36 | ENDDO |
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37 | |
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38 | DO l = 1, llm |
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39 | dsig(l) = dsig(l)/snorm |
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40 | ENDDO |
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41 | |
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42 | sig(llm+1) = 0. |
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43 | DO l = llm, 1, -1 |
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44 | sig(l) = sig(l+1) + dsig(l) |
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45 | ENDDO |
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46 | |
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47 | bp(llm+1) = 0. |
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48 | DO l = 1, llm |
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49 | bp(l) = EXP( 1. -1./( sig(l)*sig(l)) ) |
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50 | ap(l) = pa * ( sig(l) - bp(l) ) |
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51 | ENDDO |
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52 | bp(1)=1. |
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53 | ap(1)=0. |
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54 | ap(llm+1) = pa * ( sig(llm+1) - bp(llm+1) ) |
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55 | DO l = 1, llm |
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56 | presnivs(l) = 0.5 *( ap(l)+bp(l)*preff + ap(l+1)+bp(l+1)*preff ) |
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57 | ENDDO |
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58 | |
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59 | ! tell the world about it |
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60 | IF (is_mpi_root) THEN |
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61 | !$OMP MASTER |
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62 | WRITE(*,*) "ap()=",ap |
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63 | WRITE(*,*) "bp()=",bp |
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64 | WRITE(*,*) "Approximative mid-layer pressure, assuming a surface pressure preff=",preff," Pa" |
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65 | WRITE(*,*) "and approximative mid-layer height, assuming an atmospheric scale height of ",scale_height/1000," (km)" |
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66 | DO l=1,llm |
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67 | WRITE(*,*) 'PRESNIVS(',l,')=',presnivs(l),' Z ~ ',log(preff/presnivs(l))*scale_height/1000, & |
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68 | ' DZ ~ ',scale_height/1000*log((ap(l)+bp(l)*preff)/ max(ap(l+1)+bp(l+1)*preff,1.e-10)) |
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69 | ENDDO |
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70 | !$OMP END MASTER |
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71 | ENDIF |
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72 | |
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73 | END SUBROUTINE init_disvert |
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74 | |
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75 | SUBROUTINE init_disvert_strato_custom |
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76 | REAL(rstd) :: vert_scale,vert_dzmin,vert_dzlow,vert_z0low,vert_dzmid,vert_z0mid,vert_h_mid,vert_dzhig,vert_z0hig,vert_h_hig |
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77 | REAL(rstd) :: z, sig(llm+1), sig0(llm+1), zz(llm+1) |
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78 | INTEGER :: l |
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79 | ALLOCATE(ap(llm+1)) |
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80 | ALLOCATE(bp(llm+1)) |
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81 | ALLOCATE(presnivs(llm)) |
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82 | !=================================================================== |
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83 | ! David Cugnet, François Lott, Lionel Guez, Ehouoarn Millour, Fredho |
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84 | ! 2014/05 |
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85 | ! custumize strato distribution |
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86 | ! Al the parameter are given in km assuming a given scalehigh |
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87 | vert_scale=7. ! scale hight |
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88 | vert_dzmin=0.02 ! width of first layer |
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89 | vert_dzlow=1. ! dz in the low atmosphere |
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90 | vert_z0low=8. ! height at which resolution recches dzlow |
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91 | vert_dzmid=3. ! dz in the mid atmsophere |
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92 | vert_z0mid=70. ! height at which resolution recches dzmid |
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93 | vert_h_mid=20. ! width of the transition |
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94 | vert_dzhig=11. ! dz in the high atmsophere |
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95 | vert_z0hig=80. ! height at which resolution recches dz |
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96 | vert_h_hig=20. ! width of the transition |
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97 | !=================================================================== |
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98 | |
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99 | call getin('vert_scale',vert_scale) |
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100 | call getin('vert_dzmin',vert_dzmin) |
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101 | call getin('vert_dzlow',vert_dzlow) |
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102 | call getin('vert_z0low',vert_z0low) |
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103 | CALL getin('vert_dzmid',vert_dzmid) |
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104 | CALL getin('vert_z0mid',vert_z0mid) |
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105 | call getin('vert_h_mid',vert_h_mid) |
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106 | call getin('vert_dzhig',vert_dzhig) |
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107 | call getin('vert_z0hig',vert_z0hig) |
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108 | call getin('vert_h_hig',vert_h_hig) |
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109 | |
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110 | !!!!! scaleheight=vert_scale ! for consistency with further computations |
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111 | ! Build geometrical distribution |
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112 | zz(1)=0. |
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113 | DO l=1,llm |
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114 | z=zz(l) |
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115 | zz(l+1)=zz(l)+vert_dzmin+vert_dzlow*TANH(z/vert_z0low)+ & |
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116 | (vert_dzmid-vert_dzlow)* & |
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117 | (TANH((z-vert_z0mid)/vert_h_mid)-TANH((-vert_z0mid)/vert_h_mid)) & |
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118 | +(vert_dzhig-vert_dzmid-vert_dzlow)* & |
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119 | (TANH((z-vert_z0hig)/vert_h_hig)-TANH((-vert_z0hig)/vert_h_hig)) |
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120 | ENDDO |
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121 | |
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122 | |
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123 | !=================================================================== |
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124 | ! Comment added Fredho 2014/05/18, Saint-Louis, Senegal |
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125 | ! From approximate z to ap, bp, so that p=ap+bp*p0 and p/p0=exp(-z/H) |
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126 | ! sig0 is p/p0 |
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127 | ! sig is an intermediate distribution introduce to estimate bp |
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128 | ! 1. sig0=exp(-z/H) |
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129 | ! 2. inversion of sig0=(1-pa/p0)*sig+(1-pa/p0)*exp(1-1/sig**2) |
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130 | ! 3. bp=exp(1-1/sig**2) |
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131 | ! 4. ap deduced from the combination of 2 and 3 so that sig0=ap/p0+bp |
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132 | !=================================================================== |
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133 | |
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134 | sig0(llm+1)=0. |
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135 | DO l = 1, llm |
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136 | sig0(l)=EXP(-zz(l)/vert_scale) |
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137 | !!! sig(l)=racinesig(sig0(l)) |
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138 | ENDDO |
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139 | sig=racinesig(sig0) |
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140 | |
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141 | bp(llm+1) = 0. |
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142 | DO l = 2, llm |
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143 | bp(l) = EXP( 1. -1./( sig(l)*sig(l)) ) |
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144 | ap(l) = pa * ( sig(l) - bp(l) ) |
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145 | ENDDO |
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146 | bp(1)=1. |
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147 | !! ap=pa*(sig-bp) |
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148 | ap(1)=0. |
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149 | ap(llm+1) = pa * ( sig(llm+1) - bp(llm+1) ) |
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150 | DO l = 1, llm |
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151 | presnivs(l) = 0.5 *( ap(l)+bp(l)*preff + ap(l+1)+bp(l+1)*preff ) |
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152 | ENDDO |
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153 | |
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154 | ! tell the world about it |
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155 | IF (is_mpi_root) THEN |
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156 | !$OMP MASTER |
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157 | WRITE(*,*) "ap()=",ap |
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158 | WRITE(*,*) "bp()=",bp |
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159 | WRITE(*,*) "Approximative mid-layer pressure, assuming a surface pressure preff=",preff," Pa" |
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160 | WRITE(*,*) "and approximative mid-layer height, assuming an atmospheric scale height of ",scale_height/1000," (km)" |
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161 | DO l=1,llm |
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162 | WRITE(*,*) 'PRESNIVS(',l,')=',presnivs(l),' Z ~ ',log(preff/presnivs(l))*scale_height/1000, & |
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163 | ' DZ ~ ',scale_height/1000*log((ap(l)+bp(l)*preff)/ max(ap(l+1)+bp(l+1)*preff,1.e-10)) |
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164 | ENDDO |
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165 | !$OMP END MASTER |
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166 | ENDIF |
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167 | |
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168 | CONTAINS |
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169 | |
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170 | FUNCTION racinesig(sig) RESULT(sg) |
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171 | ! |
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172 | !------------------------------------------------------------------------------- |
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173 | ! Fredho 2014/05/18 |
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174 | ! Purpose: Search for s solving (Pa/Preff)*sg+(1-Pa/Preff)*EXP(1-1./sg**2)=s |
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175 | ! Notes: Uses Newton Raphson search |
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176 | !------------------------------------------------------------------------------- |
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177 | ! Arguments: |
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178 | REAL, INTENT(IN) :: sig(:) |
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179 | REAL(rstd) :: sg(SIZE(sig)) |
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180 | !------------------------------------------------------------------------------- |
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181 | ! Local variables: |
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182 | INTEGER :: it, ns, maxit |
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183 | REAL(rstd) :: c1, c2, f1 |
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184 | !------------------------------------------------------------------------------- |
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185 | ns=SIZE(sig); maxit=100 |
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186 | c1=Pa/Preff; c2=1.-c1 |
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187 | DO l=2,ns-1 |
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188 | sg(l)=sig(l) |
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189 | DO it=1,maxit |
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190 | f1=exp(1-1./sg(l)**2)*(1.-c1) |
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191 | sg(l)=sg(l)-(c1*sg(l)+f1-sig(l))/(c1+2*f1*sg(l)**(-3)) |
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192 | ENDDO |
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193 | ! print*,'SSSSIG ',sig(l),sg(l),c1*sg(l)+exp(1-1./sg(l)**2)*(1.-c1) |
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194 | ENDDO |
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195 | sg(1)=1.; sg(ns)=0. |
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196 | |
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197 | END FUNCTION racinesig |
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198 | |
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199 | END SUBROUTINE init_disvert_strato_custom |
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200 | |
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201 | END MODULE disvert_strato_mod |
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