1 | MODULE lbcnfd |
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2 | !!====================================================================== |
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3 | !! *** MODULE lbcnfd *** |
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4 | !! Ocean : north fold boundary conditions |
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5 | !!====================================================================== |
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6 | !! 9.0 ! 09-03 (R. Benshila) Initial version |
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7 | !!---------------------------------------------------------------------- |
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8 | !! * Modules used |
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9 | USE oce ! ocean dynamics and tracers |
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10 | USE dom_oce ! ocean space and time domain |
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11 | USE in_out_manager ! I/O manager |
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12 | |
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13 | IMPLICIT NONE |
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14 | PRIVATE |
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15 | |
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16 | INTERFACE lbc_nfd |
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17 | MODULE PROCEDURE lbc_nfd_3d, lbc_nfd_2d |
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18 | END INTERFACE |
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19 | |
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20 | PUBLIC lbc_nfd ! north fold conditions |
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21 | |
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22 | !!---------------------------------------------------------------------- |
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23 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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24 | !! $Id$ |
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25 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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26 | !!---------------------------------------------------------------------- |
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27 | |
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28 | CONTAINS |
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29 | |
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30 | SUBROUTINE lbc_nfd_3d( pt3d, cd_type, psgn ) |
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31 | !!---------------------------------------------------------------------- |
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32 | !! *** routine lbc_nfd_3d *** |
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33 | !! |
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34 | !! ** Purpose : 3D lateral boundary condition : North fold treatment |
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35 | !! without processor exchanges. |
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36 | !! |
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37 | !! ** Method : |
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38 | !! |
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39 | !! ** Action : pt3d with update value at its periphery |
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40 | !! |
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41 | !!---------------------------------------------------------------------- |
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42 | !! * Arguments |
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43 | CHARACTER(len=1) , INTENT( in ) :: & |
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44 | cd_type ! define the nature of ptab array grid-points |
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45 | ! ! = T , U , V , F , W points |
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46 | ! ! = S : T-point, north fold treatment ??? |
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47 | ! ! = G : F-point, north fold treatment ??? |
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48 | REAL(wp), INTENT( in ) :: & |
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49 | psgn ! control of the sign change |
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50 | ! ! = -1. , the sign is changed if north fold boundary |
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51 | ! ! = 1. , the sign is kept if north fold boundary |
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52 | REAL(wp), DIMENSION(:,:,:), INTENT( inout ) :: & |
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53 | pt3d ! 3D array on which the boundary condition is applied |
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54 | |
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55 | !! * Local declarations |
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56 | INTEGER :: ji, jk |
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57 | INTEGER :: ijt, iju, ijpj, ijpjm1 |
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58 | |
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59 | |
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60 | SELECT CASE ( jpni ) |
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61 | CASE ( 1 ) ! only one proc along I |
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62 | ijpj = nlcj |
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63 | CASE DEFAULT |
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64 | ijpj = 4 |
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65 | END SELECT |
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66 | ijpjm1 = ijpj-1 |
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67 | |
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68 | DO jk = 1, jpk |
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69 | |
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70 | SELECT CASE ( npolj ) |
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71 | |
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72 | CASE ( 3 , 4 ) ! * North fold T-point pivot |
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73 | |
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74 | SELECT CASE ( cd_type ) |
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75 | CASE ( 'T' , 'W' ) ! T-, W-point |
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76 | DO ji = 2, jpiglo |
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77 | ijt = jpiglo-ji+2 |
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78 | pt3d(ji,ijpj,jk) = psgn * pt3d(ijt,ijpj-2,jk) |
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79 | END DO |
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80 | DO ji = jpiglo/2+1, jpiglo |
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81 | ijt = jpiglo-ji+2 |
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82 | pt3d(ji,ijpjm1,jk) = psgn * pt3d(ijt,ijpjm1,jk) |
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83 | END DO |
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84 | CASE ( 'U' ) ! U-point |
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85 | DO ji = 1, jpiglo-1 |
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86 | iju = jpiglo-ji+1 |
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87 | pt3d(ji,ijpj,jk) = psgn * pt3d(iju,ijpj-2,jk) |
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88 | END DO |
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89 | DO ji = jpiglo/2, jpiglo-1 |
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90 | iju = jpiglo-ji+1 |
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91 | pt3d(ji,ijpjm1,jk) = psgn * pt3d(iju,ijpjm1,jk) |
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92 | END DO |
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93 | CASE ( 'V' ) ! V-point |
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94 | DO ji = 2, jpiglo |
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95 | ijt = jpiglo-ji+2 |
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96 | pt3d(ji,ijpj-1,jk) = psgn * pt3d(ijt,ijpj-2,jk) |
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97 | pt3d(ji,ijpj ,jk) = psgn * pt3d(ijt,ijpj-3,jk) |
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98 | END DO |
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99 | CASE ( 'F' ) ! F-point |
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100 | DO ji = 1, jpiglo-1 |
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101 | iju = jpiglo-ji+1 |
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102 | pt3d(ji,ijpj-1,jk) = psgn * pt3d(iju,ijpj-2,jk) |
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103 | pt3d(ji,ijpj ,jk) = psgn * pt3d(iju,ijpj-3,jk) |
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104 | END DO |
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105 | END SELECT |
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106 | |
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107 | CASE ( 5 , 6 ) ! * North fold F-point pivot |
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108 | |
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109 | SELECT CASE ( cd_type ) |
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110 | CASE ( 'T' , 'W' ) ! T-, W-point |
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111 | DO ji = 1, jpiglo |
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112 | ijt = jpiglo-ji+1 |
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113 | pt3d(ji,ijpj,jk) = psgn * pt3d(ijt,ijpj-1,jk) |
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114 | END DO |
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115 | CASE ( 'U' ) ! U-point |
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116 | DO ji = 1, jpiglo-1 |
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117 | iju = jpiglo-ji |
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118 | pt3d(ji,ijpj,jk) = psgn * pt3d(iju,ijpj-1,jk) |
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119 | END DO |
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120 | CASE ( 'V' ) ! V-point |
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121 | DO ji = 1, jpiglo |
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122 | ijt = jpiglo-ji+1 |
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123 | pt3d(ji,ijpj,jk) = psgn * pt3d(ijt,ijpj-2,jk) |
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124 | END DO |
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125 | DO ji = jpiglo/2+1, jpiglo |
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126 | ijt = jpiglo-ji+1 |
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127 | pt3d(ji,ijpjm1,jk) = psgn * pt3d(ijt,ijpjm1,jk) |
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128 | END DO |
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129 | CASE ( 'F' ) ! F-point |
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130 | DO ji = 1, jpiglo-1 |
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131 | iju = jpiglo-ji |
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132 | pt3d(ji,ijpj ,jk) = psgn * pt3d(iju,ijpj-2,jk) |
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133 | END DO |
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134 | DO ji = jpiglo/2+1, jpiglo-1 |
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135 | iju = jpiglo-ji |
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136 | pt3d(ji,ijpjm1,jk) = psgn * pt3d(iju,ijpjm1,jk) |
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137 | END DO |
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138 | END SELECT |
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139 | |
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140 | CASE DEFAULT ! * closed : the code probably never go through |
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141 | |
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142 | SELECT CASE ( cd_type) |
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143 | CASE ( 'T' , 'U' , 'V' , 'W' ) ! T-, U-, V-, W-points |
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144 | pt3d(:, 1 ,jk) = 0.e0 |
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145 | pt3d(:,ijpj,jk) = 0.e0 |
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146 | CASE ( 'F' ) ! F-point |
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147 | pt3d(:,ijpj,jk) = 0.e0 |
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148 | END SELECT |
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149 | |
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150 | END SELECT ! npolj |
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151 | |
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152 | END DO |
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153 | |
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154 | END SUBROUTINE lbc_nfd_3d |
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155 | |
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156 | |
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157 | SUBROUTINE lbc_nfd_2d( pt2d, cd_type, psgn, pr2dj ) |
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158 | !!---------------------------------------------------------------------- |
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159 | !! *** routine lbc_nfd_2d *** |
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160 | !! |
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161 | !! ** Purpose : 2D lateral boundary condition : North fold treatment |
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162 | !! without processor exchanges. |
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163 | !! |
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164 | !! ** Method : |
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165 | !! |
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166 | !! ** Action : pt2d with update value at its periphery |
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167 | !! |
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168 | !!---------------------------------------------------------------------- |
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169 | !! * Arguments |
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170 | CHARACTER(len=1) , INTENT( in ) :: & |
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171 | cd_type ! define the nature of ptab array grid-points |
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172 | ! ! = T , U , V , F , W points |
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173 | ! ! = S : T-point, north fold treatment ??? |
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174 | ! ! = G : F-point, north fold treatment ??? |
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175 | REAL(wp), INTENT( in ) :: & |
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176 | psgn ! control of the sign change |
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177 | ! ! = -1. , the sign is changed if north fold boundary |
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178 | ! ! = 1. , the sign is kept if north fold boundary |
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179 | REAL(wp), DIMENSION(:,:), INTENT( inout ) :: & |
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180 | pt2d ! 3D array on which the boundary condition is applied |
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181 | INTEGER, OPTIONAL, INTENT(in) :: pr2dj |
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182 | |
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183 | !! * Local declarations |
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184 | INTEGER :: ji, jl, ipr2dj |
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185 | INTEGER :: ijt, iju, ijpj, ijpjm1 |
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186 | |
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187 | SELECT CASE ( jpni ) |
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188 | CASE ( 1 ) ! only one proc along I |
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189 | ijpj = nlcj |
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190 | CASE DEFAULT |
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191 | ijpj = 4 |
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192 | END SELECT |
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193 | |
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194 | |
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195 | IF( PRESENT(pr2dj) ) THEN |
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196 | ipr2dj = pr2dj |
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197 | IF (jpni .GT. 1) ijpj = ijpj + ipr2dj |
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198 | ELSE |
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199 | ipr2dj = 0 |
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200 | ENDIF |
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201 | |
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202 | ijpjm1 = ijpj-1 |
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203 | |
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204 | |
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205 | SELECT CASE ( npolj ) |
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206 | |
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207 | CASE ( 3, 4 ) ! * North fold T-point pivot |
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208 | |
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209 | SELECT CASE ( cd_type ) |
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210 | |
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211 | CASE ( 'T', 'S', 'W' ) |
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212 | DO jl = 0, ipr2dj |
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213 | DO ji = 2, jpiglo |
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214 | ijt=jpiglo-ji+2 |
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215 | pt2d(ji,ijpj+jl) = psgn * pt2d(ijt,ijpj-2-jl) |
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216 | END DO |
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217 | END DO |
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218 | DO ji = jpiglo/2+1, jpiglo |
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219 | ijt=jpiglo-ji+2 |
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220 | pt2d(ji,ijpj-1) = psgn * pt2d(ijt,ijpj-1) |
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221 | END DO |
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222 | CASE ( 'U' ) ! U-point |
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223 | DO jl =0, ipr2dj |
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224 | DO ji = 1, jpiglo-1 |
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225 | iju = jpiglo-ji+1 |
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226 | pt2d(ji,ijpj+jl) = psgn * pt2d(iju,ijpj-2-jl) |
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227 | END DO |
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228 | END DO |
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229 | DO ji = jpiglo/2, jpiglo-1 |
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230 | iju = jpiglo-ji+1 |
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231 | pt2d(ji,ijpjm1) = psgn * pt2d(iju,ijpjm1) |
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232 | END DO |
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233 | CASE ( 'V' ) ! V-point |
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234 | DO jl =-1, ipr2dj |
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235 | DO ji = 2, jpiglo |
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236 | ijt = jpiglo-ji+2 |
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237 | pt2d(ji,ijpj+jl) = psgn * pt2d(ijt,ijpj-3-jl) |
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238 | END DO |
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239 | END DO |
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240 | CASE ( 'F' , 'G' ) ! F-point |
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241 | DO jl =-1, ipr2dj |
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242 | DO ji = 1, jpiglo-1 |
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243 | iju = jpiglo-ji+1 |
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244 | pt2d(ji,ijpj+jl) = psgn * pt2d(iju,ijpj-3-jl) |
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245 | END DO |
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246 | END DO |
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247 | CASE ( 'I' ) ! ice U-V point |
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248 | DO jl =0, ipr2dj |
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249 | pt2d(2,ijpj+jl) = psgn * pt2d(3,ijpj-1+jl) |
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250 | DO ji = 3, jpiglo |
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251 | iju = jpiglo - ji + 3 |
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252 | pt2d(ji,ijpj+jl) = psgn * pt2d(iju,ijpj-1-jl) |
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253 | END DO |
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254 | END DO |
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255 | END SELECT |
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256 | |
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257 | CASE ( 5, 6 ) ! * North fold F-point pivot |
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258 | |
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259 | SELECT CASE ( cd_type ) |
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260 | CASE ( 'T' , 'W' ,'S' ) ! T-, W-point |
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261 | DO jl = 0, ipr2dj |
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262 | DO ji = 1, jpiglo |
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263 | ijt = jpiglo-ji+1 |
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264 | pt2d(ji,ijpj+jl) = psgn * pt2d(ijt,ijpj-1-jl) |
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265 | END DO |
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266 | END DO |
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267 | CASE ( 'U' ) ! U-point |
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268 | DO jl = 0, ipr2dj |
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269 | DO ji = 1, jpiglo-1 |
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270 | iju = jpiglo-ji |
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271 | pt2d(ji,ijpj+jl) = psgn * pt2d(iju,ijpj-1-jl) |
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272 | END DO |
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273 | END DO |
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274 | CASE ( 'V' ) ! V-point |
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275 | DO jl = 0, ipr2dj |
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276 | DO ji = 1, jpiglo |
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277 | ijt = jpiglo-ji+1 |
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278 | pt2d(ji,ijpj+jl) = psgn * pt2d(ijt,ijpj-2-jl) |
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279 | END DO |
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280 | END DO |
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281 | DO ji = jpiglo/2+1, jpiglo |
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282 | ijt = jpiglo-ji+1 |
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283 | pt2d(ji,ijpjm1) = psgn * pt2d(ijt,ijpjm1) |
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284 | END DO |
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285 | CASE ( 'F' , 'G' ) ! F-point |
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286 | DO jl = 0, ipr2dj |
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287 | DO ji = 1, jpiglo-1 |
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288 | iju = jpiglo-ji |
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289 | pt2d(ji,ijpj+jl) = psgn * pt2d(iju,ijpj-2-jl) |
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290 | END DO |
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291 | END DO |
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292 | DO ji = jpiglo/2+1, jpiglo-1 |
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293 | iju = jpiglo-ji |
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294 | pt2d(ji,ijpjm1) = psgn * pt2d(iju,ijpjm1) |
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295 | END DO |
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296 | CASE ( 'I' ) ! ice U-V point |
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297 | pt2d( 2 ,ijpj:ijpj+ipr2dj) = 0.e0 |
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298 | DO jl = 0, ipr2dj |
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299 | DO ji = 2 , jpiglo-1 |
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300 | ijt = jpiglo - ji + 2 |
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301 | pt2d(ji,ijpj+jl)= 0.5 * ( pt2d(ji,ijpj-1-jl) + psgn * pt2d(ijt,ijpj-1-jl) ) |
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302 | END DO |
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303 | END DO |
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304 | END SELECT |
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305 | |
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306 | CASE DEFAULT ! * closed : the code probably never go through |
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307 | |
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308 | SELECT CASE ( cd_type) |
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309 | CASE ( 'T' , 'U' , 'V' , 'W' ) ! T-, U-, V-, W-points |
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310 | pt2d(:, 1:1-ipr2dj ) = 0.e0 |
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311 | pt2d(:,ijpj:ijpj+ipr2dj) = 0.e0 |
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312 | CASE ( 'F' ) ! F-point |
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313 | pt2d(:,ijpj:ijpj+ipr2dj) = 0.e0 |
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314 | CASE ( 'I' ) ! ice U-V point |
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315 | pt2d(:, 1:1-ipr2dj ) = 0.e0 |
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316 | pt2d(:,ijpj:ijpj+ipr2dj) = 0.e0 |
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317 | END SELECT |
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318 | |
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319 | END SELECT |
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320 | |
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321 | END SUBROUTINE lbc_nfd_2d |
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322 | |
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323 | !!====================================================================== |
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324 | END MODULE lbcnfd |
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