1 | ! |
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2 | ! $Id$ |
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3 | ! |
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4 | module inter_barxy_m |
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5 | |
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6 | ! Authors: Robert SADOURNY, Phu LE VAN, Lionel GUEZ |
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7 | |
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8 | USE comgeom2_mod_h |
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9 | USE dimensions_mod, ONLY: iim, jjm, llm, ndm |
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10 | USE paramet_mod_h |
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11 | implicit none |
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12 | |
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13 | private |
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14 | public inter_barxy |
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15 | |
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16 | contains |
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17 | |
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18 | SUBROUTINE inter_barxy(dlonid, dlatid, champ, rlonimod, rlatimod, champint) |
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19 | |
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20 | use assert_eq_m, only: assert_eq |
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21 | use assert_m, only: assert |
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22 | |
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23 | |
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24 | ! (for "iim", "jjm") |
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25 | |
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26 | |
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27 | ! (for other included files) |
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28 | |
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29 | ! (for "aire", "apoln", "apols") |
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30 | |
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31 | REAL, intent(in):: dlonid(:) |
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32 | ! (longitude from input file, in rad, from -pi to pi) |
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33 | |
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34 | REAL, intent(in):: dlatid(:), champ(:, :), rlonimod(:) |
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35 | |
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36 | REAL, intent(in):: rlatimod(:) |
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37 | ! (latitude angle, in degrees or rad, in strictly decreasing order) |
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38 | |
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39 | real, intent(out):: champint(:, :) |
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40 | ! Si taille de la seconde dim = jjm + 1, on veut interpoler sur les |
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41 | ! jjm+1 latitudes rlatu du modele (latitudes des scalaires et de U) |
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42 | ! Si taille de la seconde dim = jjm, on veut interpoler sur les |
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43 | ! jjm latitudes rlatv du modele (latitudes de V) |
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44 | |
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45 | ! Variables local to the procedure: |
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46 | |
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47 | REAL champy(iim, size(champ, 2)) |
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48 | integer j, i, jnterfd, jmods |
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49 | |
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50 | REAL yjmod(size(champint, 2)) |
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51 | ! (angle, in degrees, in strictly increasing order) |
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52 | |
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53 | REAL yjdat(size(dlatid) + 1) ! angle, in degrees, in increasing order |
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54 | LOGICAL decrois ! "dlatid" is in decreasing order |
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55 | |
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56 | !----------------------------------- |
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57 | |
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58 | jnterfd = assert_eq(size(champ, 2) - 1, size(dlatid), & |
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59 | "inter_barxy jnterfd") |
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60 | jmods = size(champint, 2) |
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61 | call assert(size(champ, 1) == size(dlonid), "inter_barxy size(champ, 1)") |
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62 | call assert((/size(rlonimod), size(champint, 1)/) == iim, & |
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63 | "inter_barxy iim") |
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64 | call assert(any(jmods == (/jjm, jjm + 1/)), 'inter_barxy jmods') |
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65 | call assert(size(rlatimod) == jjm, "inter_barxy size(rlatimod)") |
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66 | |
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67 | ! Check decreasing order for "rlatimod": |
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68 | DO i = 2, jjm |
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69 | IF (rlatimod(i) >= rlatimod(i-1)) stop & |
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70 | '"inter_barxy": "rlatimod" should be strictly decreasing' |
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71 | ENDDO |
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72 | |
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73 | yjmod(:jjm) = ord_coordm(rlatimod) |
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74 | IF (jmods == jjm + 1) THEN |
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75 | IF (90. - yjmod(jjm) < 0.01) stop & |
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76 | '"inter_barxy": with jmods = jjm + 1, yjmod(jjm) should be < 90.' |
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77 | ELSE |
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78 | ! jmods = jjm |
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79 | IF (ABS(yjmod(jjm) - 90.) > 0.01) stop & |
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80 | '"inter_barxy": with jmods = jjm, yjmod(jjm) should be 90.' |
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81 | ENDIF |
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82 | |
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83 | if (jmods == jjm + 1) yjmod(jjm + 1) = 90. |
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84 | |
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85 | DO j = 1, jnterfd + 1 |
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86 | champy(:, j) = inter_barx(dlonid, champ(:, j), rlonimod) |
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87 | ENDDO |
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88 | |
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89 | CALL ord_coord(dlatid, yjdat, decrois) |
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90 | IF (decrois) champy(:, :) = champy(:, jnterfd + 1:1:-1) |
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91 | DO i = 1, iim |
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92 | champint(i, :) = inter_bary(yjdat, champy(i, :), yjmod) |
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93 | ENDDO |
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94 | champint(:, :) = champint(:, jmods:1:-1) |
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95 | |
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96 | IF (jmods == jjm + 1) THEN |
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97 | ! Valeurs uniques aux poles |
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98 | champint(:, 1) = SUM(aire(:iim, 1) * champint(:, 1)) / apoln |
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99 | champint(:, jjm + 1) = SUM(aire(:iim, jjm + 1) & |
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100 | * champint(:, jjm + 1)) / apols |
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101 | ENDIF |
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102 | |
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103 | END SUBROUTINE inter_barxy |
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104 | |
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105 | !****************************** |
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106 | |
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107 | function inter_barx(dlonid, fdat, rlonimod) |
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108 | |
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109 | ! INTERPOLATION BARYCENTRIQUE BASEE SUR LES AIRES |
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110 | ! VERSION UNIDIMENSIONNELLE , EN LONGITUDE . |
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111 | |
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112 | ! idat : indice du champ de donnees, de 1 a idatmax |
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113 | ! imod : indice du champ du modele, de 1 a imodmax |
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114 | ! fdat(idat) : champ de donnees (entrees) |
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115 | ! inter_barx(imod) : champ du modele (sorties) |
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116 | ! dlonid(idat): abscisses des interfaces des mailles donnees |
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117 | ! rlonimod(imod): abscisses des interfaces des mailles modele |
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118 | ! ( L'indice 1 correspond a l'interface mailLE 1 / maille 2) |
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119 | ! ( Les abscisses sont exprimees en degres) |
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120 | |
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121 | use assert_eq_m, only: assert_eq |
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122 | |
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123 | IMPLICIT NONE |
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124 | |
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125 | REAL, intent(in):: dlonid(:) |
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126 | real, intent(in):: fdat(:) |
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127 | real, intent(in):: rlonimod(:) |
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128 | |
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129 | real inter_barx(size(rlonimod)) |
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130 | |
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131 | ! ... Variables locales ... |
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132 | |
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133 | INTEGER idatmax, imodmax |
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134 | REAL xxid(size(dlonid)+1), xxd(size(dlonid)+1), fdd(size(dlonid)+1) |
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135 | REAL fxd(size(dlonid)+1), xchan(size(dlonid)+1), fdchan(size(dlonid)+1) |
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136 | REAL xxim(size(rlonimod)) |
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137 | |
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138 | REAL x0, xim0, dx, dxm |
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139 | REAL chmin, chmax, pi |
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140 | |
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141 | INTEGER imod, idat, i, ichang, id0, id1, nid, idatmax1 |
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142 | |
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143 | !----------------------------------------------------- |
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144 | |
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145 | idatmax = assert_eq(size(dlonid), size(fdat), "inter_barx idatmax") |
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146 | imodmax = size(rlonimod) |
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147 | |
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148 | pi = 2. * ASIN(1.) |
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149 | |
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150 | ! REDEFINITION DE L'ORIGINE DES ABSCISSES |
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151 | ! A L'INTERFACE OUEST DE LA PREMIERE MAILLE DU MODELE |
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152 | DO imod = 1, imodmax |
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153 | xxim(imod) = rlonimod(imod) |
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154 | ENDDO |
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155 | |
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156 | CALL minmax( imodmax, xxim, chmin, chmax) |
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157 | IF( chmax.LT.6.50 ) THEN |
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158 | DO imod = 1, imodmax |
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159 | xxim(imod) = xxim(imod) * 180./pi |
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160 | ENDDO |
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161 | ENDIF |
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162 | |
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163 | xim0 = xxim(imodmax) - 360. |
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164 | |
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165 | DO imod = 1, imodmax |
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166 | xxim(imod) = xxim(imod) - xim0 |
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167 | ENDDO |
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168 | |
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169 | idatmax1 = idatmax +1 |
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170 | |
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171 | DO idat = 1, idatmax |
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172 | xxd(idat) = dlonid(idat) |
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173 | ENDDO |
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174 | |
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175 | CALL minmax( idatmax, xxd, chmin, chmax) |
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176 | IF( chmax.LT.6.50 ) THEN |
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177 | DO idat = 1, idatmax |
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178 | xxd(idat) = xxd(idat) * 180./pi |
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179 | ENDDO |
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180 | ENDIF |
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181 | |
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182 | DO idat = 1, idatmax |
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183 | xxd(idat) = MOD( xxd(idat) - xim0, 360. ) |
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184 | fdd(idat) = fdat (idat) |
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185 | ENDDO |
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186 | |
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187 | i = 2 |
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188 | DO while (xxd(i) >= xxd(i-1) .and. i < idatmax) |
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189 | i = i + 1 |
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190 | ENDDO |
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191 | IF (xxd(i) < xxd(i-1)) THEN |
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192 | ichang = i |
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193 | ! *** reorganisation des longitudes entre 0. et 360. degres **** |
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194 | nid = idatmax - ichang +1 |
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195 | DO i = 1, nid |
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196 | xchan (i) = xxd(i+ichang -1 ) |
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197 | fdchan(i) = fdd(i+ichang -1 ) |
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198 | ENDDO |
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199 | DO i=1, ichang -1 |
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200 | xchan (i+ nid) = xxd(i) |
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201 | fdchan(i+nid) = fdd(i) |
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202 | ENDDO |
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203 | DO i =1, idatmax |
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204 | xxd(i) = xchan(i) |
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205 | fdd(i) = fdchan(i) |
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206 | ENDDO |
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207 | end IF |
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208 | |
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209 | ! translation des champs de donnees par rapport |
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210 | ! a la nouvelle origine, avec redondance de la |
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211 | ! maille a cheval sur les bords |
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212 | |
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213 | id0 = 0 |
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214 | id1 = 0 |
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215 | |
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216 | DO idat = 1, idatmax |
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217 | IF ( xxd( idatmax1- idat ).LT.360.) exit |
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218 | id1 = id1 + 1 |
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219 | ENDDO |
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220 | |
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221 | DO idat = 1, idatmax |
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222 | IF (xxd(idat).GT.0.) exit |
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223 | id0 = id0 + 1 |
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224 | END DO |
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225 | |
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226 | IF( id1 /= 0 ) then |
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227 | DO idat = 1, id1 |
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228 | xxid(idat) = xxd(idatmax - id1 + idat) - 360. |
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229 | fxd (idat) = fdd(idatmax - id1 + idat) |
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230 | END DO |
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231 | DO idat = 1, idatmax - id1 |
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232 | xxid(idat + id1) = xxd(idat) |
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233 | fxd (idat + id1) = fdd(idat) |
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234 | END DO |
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235 | end IF |
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236 | |
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237 | IF(id0 /= 0) then |
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238 | DO idat = 1, idatmax - id0 |
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239 | xxid(idat) = xxd(idat + id0) |
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240 | fxd (idat) = fdd(idat + id0) |
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241 | END DO |
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242 | |
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243 | DO idat = 1, id0 |
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244 | xxid (idatmax - id0 + idat) = xxd(idat) + 360. |
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245 | fxd (idatmax - id0 + idat) = fdd(idat) |
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246 | END DO |
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247 | else |
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248 | DO idat = 1, idatmax |
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249 | xxid(idat) = xxd(idat) |
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250 | fxd (idat) = fdd(idat) |
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251 | ENDDO |
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252 | end IF |
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253 | xxid(idatmax1) = xxid(1) + 360. |
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254 | fxd (idatmax1) = fxd(1) |
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255 | |
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256 | ! initialisation du champ du modele |
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257 | |
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258 | inter_barx(:) = 0. |
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259 | |
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260 | ! iteration |
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261 | |
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262 | x0 = xim0 |
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263 | dxm = 0. |
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264 | imod = 1 |
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265 | idat = 1 |
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266 | |
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267 | do while (imod <= imodmax) |
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268 | do while (xxim(imod).GT.xxid(idat)) |
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269 | dx = xxid(idat) - x0 |
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270 | dxm = dxm + dx |
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271 | inter_barx(imod) = inter_barx(imod) + dx * fxd(idat) |
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272 | x0 = xxid(idat) |
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273 | idat = idat + 1 |
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274 | end do |
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275 | IF (xxim(imod).LT.xxid(idat)) THEN |
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276 | dx = xxim(imod) - x0 |
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277 | dxm = dxm + dx |
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278 | inter_barx(imod) = (inter_barx(imod) + dx * fxd(idat)) / dxm |
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279 | x0 = xxim(imod) |
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280 | dxm = 0. |
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281 | imod = imod + 1 |
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282 | ELSE |
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283 | dx = xxim(imod) - x0 |
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284 | dxm = dxm + dx |
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285 | inter_barx(imod) = (inter_barx(imod) + dx * fxd(idat)) / dxm |
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286 | x0 = xxim(imod) |
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287 | dxm = 0. |
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288 | imod = imod + 1 |
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289 | idat = idat + 1 |
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290 | END IF |
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291 | end do |
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292 | |
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293 | END function inter_barx |
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294 | |
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295 | !****************************** |
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296 | |
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297 | function inter_bary(yjdat, fdat, yjmod) |
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298 | |
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299 | ! Interpolation barycentrique basée sur les aires. |
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300 | ! Version unidimensionnelle, en latitude. |
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301 | ! L'indice 1 correspond à l'interface maille 1 -- maille 2. |
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302 | |
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303 | use assert_m, only: assert |
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304 | |
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305 | IMPLICIT NONE |
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306 | |
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307 | REAL, intent(in):: yjdat(:) |
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308 | ! (angles, ordonnées des interfaces des mailles des données, in |
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309 | ! degrees, in increasing order) |
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310 | |
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311 | REAL, intent(in):: fdat(:) ! champ de données |
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312 | |
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313 | REAL, intent(in):: yjmod(:) |
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314 | ! (ordonnées des interfaces des mailles du modèle) |
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315 | ! (in degrees, in strictly increasing order) |
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316 | |
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317 | REAL inter_bary(size(yjmod)) ! champ du modèle |
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318 | |
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319 | ! Variables local to the procedure: |
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320 | |
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321 | REAL y0, dy, dym |
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322 | INTEGER jdat ! indice du champ de données |
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323 | integer jmod ! indice du champ du modèle |
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324 | |
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325 | !------------------------------------ |
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326 | |
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327 | call assert(size(yjdat) == size(fdat), "inter_bary") |
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328 | |
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329 | ! Initialisation des variables |
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330 | inter_bary(:) = 0. |
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331 | y0 = -90. |
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332 | dym = 0. |
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333 | jmod = 1 |
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334 | jdat = 1 |
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335 | |
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336 | do while (jmod <= size(yjmod)) |
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337 | do while (yjmod(jmod) > yjdat(jdat)) |
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338 | dy = yjdat(jdat) - y0 |
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339 | dym = dym + dy |
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340 | inter_bary(jmod) = inter_bary(jmod) + dy * fdat(jdat) |
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341 | y0 = yjdat(jdat) |
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342 | jdat = jdat + 1 |
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343 | end do |
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344 | IF (yjmod(jmod) < yjdat(jdat)) THEN |
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345 | dy = yjmod(jmod) - y0 |
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346 | dym = dym + dy |
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347 | inter_bary(jmod) = (inter_bary(jmod) + dy * fdat(jdat)) / dym |
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348 | y0 = yjmod(jmod) |
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349 | dym = 0. |
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350 | jmod = jmod + 1 |
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351 | ELSE |
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352 | ! {yjmod(jmod) == yjdat(jdat)} |
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353 | dy = yjmod(jmod) - y0 |
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354 | dym = dym + dy |
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355 | inter_bary(jmod) = (inter_bary(jmod) + dy * fdat(jdat)) / dym |
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356 | y0 = yjmod(jmod) |
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357 | dym = 0. |
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358 | jmod = jmod + 1 |
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359 | jdat = jdat + 1 |
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360 | END IF |
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361 | end do |
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362 | ! Le test de fin suppose que l'interface 0 est commune aux deux |
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363 | ! grilles "yjdat" et "yjmod". |
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364 | |
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365 | END function inter_bary |
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366 | |
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367 | !****************************** |
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368 | |
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369 | SUBROUTINE ord_coord(xi, xo, decrois) |
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370 | |
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371 | ! This procedure receives an array of latitudes. |
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372 | ! It converts them to degrees if they are in radians. |
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373 | ! If the input latitudes are in decreasing order, the procedure |
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374 | ! reverses their order. |
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375 | ! Finally, the procedure adds 90° as the last value of the array. |
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376 | |
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377 | use assert_eq_m, only: assert_eq |
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378 | use comconst_mod, only: pi |
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379 | |
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380 | IMPLICIT NONE |
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381 | |
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382 | REAL, intent(in):: xi(:) |
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383 | ! (latitude, in degrees or radians, in increasing or decreasing order) |
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384 | ! ("xi" should contain latitudes from pole to pole. |
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385 | ! "xi" should contain the latitudes of the boundaries of grid |
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386 | ! cells, not the centers of grid cells. |
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387 | ! So the extreme values should not be 90° and -90°.) |
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388 | |
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389 | REAL, intent(out):: xo(:) ! angles in degrees |
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390 | LOGICAL, intent(out):: decrois |
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391 | |
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392 | ! Variables local to the procedure: |
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393 | INTEGER nmax, i |
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394 | |
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395 | !-------------------- |
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396 | |
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397 | nmax = assert_eq(size(xi), size(xo) - 1, "ord_coord") |
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398 | |
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399 | ! Check monotonicity: |
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400 | decrois = xi(2) < xi(1) |
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401 | DO i = 3, nmax |
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402 | IF (decrois .neqv. xi(i) < xi(i-1)) stop & |
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403 | '"ord_coord": latitudes are not monotonic' |
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404 | ENDDO |
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405 | |
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406 | IF (abs(xi(1)) < pi) then |
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407 | ! "xi" contains latitudes in radians |
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408 | xo(:nmax) = xi(:) * 180. / pi |
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409 | else |
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410 | ! "xi" contains latitudes in degrees |
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411 | xo(:nmax) = xi(:) |
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412 | end IF |
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413 | |
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414 | IF (ABS(abs(xo(1)) - 90) < 0.001 .or. ABS(abs(xo(nmax)) - 90) < 0.001) THEN |
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415 | print *, "ord_coord" |
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416 | PRINT *, '"xi" should contain the latitudes of the boundaries of ' & |
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417 | // 'grid cells, not the centers of grid cells.' |
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418 | STOP |
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419 | ENDIF |
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420 | |
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421 | IF (decrois) xo(:nmax) = xo(nmax:1:- 1) |
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422 | xo(nmax + 1) = 90. |
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423 | |
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424 | END SUBROUTINE ord_coord |
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425 | |
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426 | !*********************************** |
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427 | |
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428 | function ord_coordm(xi) |
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429 | |
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430 | ! This procedure converts to degrees, if necessary, and inverts the |
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431 | ! order. |
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432 | |
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433 | use comconst_mod, only: pi |
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434 | |
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435 | IMPLICIT NONE |
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436 | |
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437 | REAL, intent(in):: xi(:) ! angle, in rad or degrees |
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438 | REAL ord_coordm(size(xi)) ! angle, in degrees |
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439 | |
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440 | !----------------------------- |
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441 | |
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442 | IF (xi(1) < 6.5) THEN |
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443 | ! "xi" is in rad |
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444 | ord_coordm(:) = xi(size(xi):1:-1) * 180. / pi |
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445 | else |
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446 | ! "xi" is in degrees |
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447 | ord_coordm(:) = xi(size(xi):1:-1) |
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448 | ENDIF |
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449 | |
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450 | END function ord_coordm |
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451 | |
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452 | end module inter_barxy_m |
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