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 | !! History : 3.2 ! 2009-03 (R. Benshila) Original code |
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7 | !!---------------------------------------------------------------------- |
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8 | |
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9 | !!---------------------------------------------------------------------- |
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10 | !! lbc_nfd : generic interface for lbc_nfd_3d and lbc_nfd_2d routines |
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11 | !! lbc_nfd_3d : lateral boundary condition: North fold treatment for a 3D arrays (lbc_nfd) |
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12 | !! lbc_nfd_2d : lateral boundary condition: North fold treatment for a 2D arrays (lbc_nfd) |
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13 | !!---------------------------------------------------------------------- |
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14 | USE oce ! ocean dynamics and tracers |
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15 | USE dom_oce ! ocean space and time domain |
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16 | USE in_out_manager ! I/O manager |
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17 | |
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18 | IMPLICIT NONE |
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19 | PRIVATE |
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20 | |
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21 | INTERFACE lbc_nfd |
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22 | MODULE PROCEDURE lbc_nfd_3d, lbc_nfd_2d |
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23 | END INTERFACE |
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24 | |
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25 | PUBLIC lbc_nfd ! north fold conditions |
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26 | |
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27 | !!---------------------------------------------------------------------- |
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28 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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29 | !! $Id$ |
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30 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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31 | !!---------------------------------------------------------------------- |
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32 | CONTAINS |
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33 | |
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34 | SUBROUTINE lbc_nfd_3d( pt3d, cd_type, psgn ) |
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35 | !!---------------------------------------------------------------------- |
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36 | !! *** routine lbc_nfd_3d *** |
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37 | !! |
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38 | !! ** Purpose : 3D lateral boundary condition : North fold treatment |
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39 | !! without processor exchanges. |
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40 | !! |
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41 | !! ** Method : |
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42 | !! |
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43 | !! ** Action : pt3d with updated values along the north fold |
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44 | !!---------------------------------------------------------------------- |
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45 | CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points |
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46 | ! ! = T , U , V , F , W points |
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47 | REAL(wp) , INTENT(in ) :: psgn ! control of the sign change |
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48 | ! ! = -1. , the sign is changed if north fold boundary |
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49 | ! ! = 1. , the sign is kept if north fold boundary |
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50 | REAL(wp), DIMENSION(:,:,:), INTENT(inout) :: pt3d ! 3D array on which the boundary condition is applied |
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51 | ! |
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52 | INTEGER :: ji, jk |
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53 | INTEGER :: ijt, iju, ijpj, ijpjm1 |
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54 | !!---------------------------------------------------------------------- |
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55 | |
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56 | SELECT CASE ( jpni ) |
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57 | CASE ( 1 ) ; ijpj = nlcj ! 1 proc only along the i-direction |
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58 | CASE DEFAULT ; ijpj = 4 ! several proc along the i-direction |
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59 | END SELECT |
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60 | ijpjm1 = ijpj-1 |
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61 | |
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62 | DO jk = 1, jpk |
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63 | ! |
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64 | SELECT CASE ( npolj ) |
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65 | ! |
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66 | CASE ( 3 , 4 ) ! * North fold T-point pivot |
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67 | ! |
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68 | SELECT CASE ( cd_type ) |
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69 | CASE ( 'T' , 'W' ) ! T-, W-point |
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70 | DO ji = 2, jpiglo |
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71 | ijt = jpiglo-ji+2 |
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72 | pt3d(ji,ijpj,jk) = psgn * pt3d(ijt,ijpj-2,jk) |
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73 | END DO |
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74 | DO ji = jpiglo/2+1, jpiglo |
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75 | ijt = jpiglo-ji+2 |
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76 | pt3d(ji,ijpjm1,jk) = psgn * pt3d(ijt,ijpjm1,jk) |
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77 | END DO |
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78 | CASE ( 'U' ) ! U-point |
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79 | DO ji = 1, jpiglo-1 |
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80 | iju = jpiglo-ji+1 |
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81 | pt3d(ji,ijpj,jk) = psgn * pt3d(iju,ijpj-2,jk) |
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82 | END DO |
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83 | DO ji = jpiglo/2, jpiglo-1 |
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84 | iju = jpiglo-ji+1 |
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85 | pt3d(ji,ijpjm1,jk) = psgn * pt3d(iju,ijpjm1,jk) |
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86 | END DO |
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87 | CASE ( 'V' ) ! V-point |
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88 | DO ji = 2, jpiglo |
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89 | ijt = jpiglo-ji+2 |
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90 | pt3d(ji,ijpj-1,jk) = psgn * pt3d(ijt,ijpj-2,jk) |
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91 | pt3d(ji,ijpj ,jk) = psgn * pt3d(ijt,ijpj-3,jk) |
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92 | END DO |
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93 | CASE ( 'F' ) ! F-point |
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94 | DO ji = 1, jpiglo-1 |
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95 | iju = jpiglo-ji+1 |
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96 | pt3d(ji,ijpj-1,jk) = psgn * pt3d(iju,ijpj-2,jk) |
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97 | pt3d(ji,ijpj ,jk) = psgn * pt3d(iju,ijpj-3,jk) |
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98 | END DO |
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99 | END SELECT |
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100 | ! |
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101 | CASE ( 5 , 6 ) ! * North fold F-point pivot |
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102 | ! |
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103 | SELECT CASE ( cd_type ) |
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104 | CASE ( 'T' , 'W' ) ! T-, W-point |
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105 | DO ji = 1, jpiglo |
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106 | ijt = jpiglo-ji+1 |
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107 | pt3d(ji,ijpj,jk) = psgn * pt3d(ijt,ijpj-1,jk) |
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108 | END DO |
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109 | CASE ( 'U' ) ! U-point |
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110 | DO ji = 1, jpiglo-1 |
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111 | iju = jpiglo-ji |
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112 | pt3d(ji,ijpj,jk) = psgn * pt3d(iju,ijpj-1,jk) |
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113 | END DO |
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114 | CASE ( 'V' ) ! V-point |
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115 | DO ji = 1, jpiglo |
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116 | ijt = jpiglo-ji+1 |
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117 | pt3d(ji,ijpj,jk) = psgn * pt3d(ijt,ijpj-2,jk) |
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118 | END DO |
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119 | DO ji = jpiglo/2+1, jpiglo |
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120 | ijt = jpiglo-ji+1 |
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121 | pt3d(ji,ijpjm1,jk) = psgn * pt3d(ijt,ijpjm1,jk) |
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122 | END DO |
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123 | CASE ( 'F' ) ! F-point |
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124 | DO ji = 1, jpiglo-1 |
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125 | iju = jpiglo-ji |
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126 | pt3d(ji,ijpj ,jk) = psgn * pt3d(iju,ijpj-2,jk) |
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127 | END DO |
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128 | DO ji = jpiglo/2+1, jpiglo-1 |
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129 | iju = jpiglo-ji |
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130 | pt3d(ji,ijpjm1,jk) = psgn * pt3d(iju,ijpjm1,jk) |
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131 | END DO |
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132 | END SELECT |
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133 | ! |
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134 | CASE DEFAULT ! * closed : the code probably never go through |
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135 | ! |
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136 | SELECT CASE ( cd_type) |
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137 | CASE ( 'T' , 'U' , 'V' , 'W' ) ! T-, U-, V-, W-points |
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138 | pt3d(:, 1 ,jk) = 0.e0 |
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139 | pt3d(:,ijpj,jk) = 0.e0 |
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140 | CASE ( 'F' ) ! F-point |
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141 | pt3d(:,ijpj,jk) = 0.e0 |
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142 | END SELECT |
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143 | ! |
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144 | END SELECT ! npolj |
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145 | ! |
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146 | END DO |
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147 | ! |
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148 | END SUBROUTINE lbc_nfd_3d |
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149 | |
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150 | |
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151 | SUBROUTINE lbc_nfd_2d( pt2d, cd_type, psgn, pr2dj ) |
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152 | !!---------------------------------------------------------------------- |
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153 | !! *** routine lbc_nfd_2d *** |
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154 | !! |
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155 | !! ** Purpose : 2D lateral boundary condition : North fold treatment |
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156 | !! without processor exchanges. |
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157 | !! |
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158 | !! ** Method : |
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159 | !! |
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160 | !! ** Action : pt2d with updated values along the north fold |
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161 | !!---------------------------------------------------------------------- |
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162 | CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points |
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163 | ! ! = T , U , V , F , W points |
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164 | REAL(wp) , INTENT(in ) :: psgn ! control of the sign change |
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165 | ! ! = -1. , the sign is changed if north fold boundary |
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166 | ! ! = 1. , the sign is kept if north fold boundary |
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167 | REAL(wp), DIMENSION(:,:), INTENT(inout) :: pt2d ! 2D array on which the boundary condition is applied |
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168 | INTEGER , OPTIONAL , INTENT(in ) :: pr2dj ! number of additional halos |
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169 | ! |
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170 | INTEGER :: ji, jl, ipr2dj |
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171 | INTEGER :: ijt, iju, ijpj, ijpjm1 |
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172 | !!---------------------------------------------------------------------- |
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173 | |
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174 | SELECT CASE ( jpni ) |
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175 | CASE ( 1 ) ; ijpj = nlcj ! 1 proc only along the i-direction |
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176 | CASE DEFAULT ; ijpj = 4 ! several proc along the i-direction |
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177 | END SELECT |
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178 | ! |
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179 | IF( PRESENT(pr2dj) ) THEN ! use of additional halos |
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180 | ipr2dj = pr2dj |
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181 | IF( jpni > 1 ) ijpj = ijpj + ipr2dj |
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182 | ELSE |
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183 | ipr2dj = 0 |
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184 | ENDIF |
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185 | ! |
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186 | ijpjm1 = ijpj-1 |
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187 | |
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188 | |
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189 | SELECT CASE ( npolj ) |
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190 | ! |
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191 | CASE ( 3, 4 ) ! * North fold T-point pivot |
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192 | ! |
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193 | SELECT CASE ( cd_type ) |
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194 | ! |
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195 | CASE ( 'T' , 'W' ) ! T- , W-points |
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196 | DO jl = 0, ipr2dj |
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197 | DO ji = 2, jpiglo |
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198 | ijt=jpiglo-ji+2 |
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199 | pt2d(ji,ijpj+jl) = psgn * pt2d(ijt,ijpj-2-jl) |
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200 | END DO |
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201 | END DO |
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202 | DO ji = jpiglo/2+1, jpiglo |
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203 | ijt=jpiglo-ji+2 |
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204 | pt2d(ji,ijpj-1) = psgn * pt2d(ijt,ijpj-1) |
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205 | END DO |
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206 | CASE ( 'U' ) ! U-point |
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207 | DO jl = 0, ipr2dj |
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208 | DO ji = 1, jpiglo-1 |
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209 | iju = jpiglo-ji+1 |
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210 | pt2d(ji,ijpj+jl) = psgn * pt2d(iju,ijpj-2-jl) |
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211 | END DO |
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212 | END DO |
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213 | DO ji = jpiglo/2, jpiglo-1 |
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214 | iju = jpiglo-ji+1 |
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215 | pt2d(ji,ijpjm1) = psgn * pt2d(iju,ijpjm1) |
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216 | END DO |
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217 | CASE ( 'V' ) ! V-point |
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218 | DO jl = -1, ipr2dj |
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219 | DO ji = 2, jpiglo |
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220 | ijt = jpiglo-ji+2 |
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221 | pt2d(ji,ijpj+jl) = psgn * pt2d(ijt,ijpj-3-jl) |
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222 | END DO |
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223 | END DO |
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224 | CASE ( 'F' ) ! F-point |
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225 | DO jl = -1, ipr2dj |
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226 | DO ji = 1, jpiglo-1 |
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227 | iju = jpiglo-ji+1 |
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228 | pt2d(ji,ijpj+jl) = psgn * pt2d(iju,ijpj-3-jl) |
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229 | END DO |
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230 | END DO |
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231 | CASE ( 'I' ) ! ice U-V point (I-point) |
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232 | DO jl = 0, ipr2dj |
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233 | pt2d(2,ijpj+jl) = psgn * pt2d(3,ijpj-1+jl) |
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234 | DO ji = 3, jpiglo |
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235 | iju = jpiglo - ji + 3 |
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236 | pt2d(ji,ijpj+jl) = psgn * pt2d(iju,ijpj-1-jl) |
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237 | END DO |
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238 | END DO |
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239 | END SELECT |
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240 | ! |
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241 | CASE ( 5, 6 ) ! * North fold F-point pivot |
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242 | ! |
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243 | SELECT CASE ( cd_type ) |
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244 | CASE ( 'T' , 'W' ) ! T-, W-point |
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245 | DO jl = 0, ipr2dj |
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246 | DO ji = 1, jpiglo |
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247 | ijt = jpiglo-ji+1 |
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248 | pt2d(ji,ijpj+jl) = psgn * pt2d(ijt,ijpj-1-jl) |
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249 | END DO |
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250 | END DO |
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251 | CASE ( 'U' ) ! U-point |
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252 | DO jl = 0, ipr2dj |
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253 | DO ji = 1, jpiglo-1 |
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254 | iju = jpiglo-ji |
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255 | pt2d(ji,ijpj+jl) = psgn * pt2d(iju,ijpj-1-jl) |
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256 | END DO |
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257 | END DO |
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258 | CASE ( 'V' ) ! V-point |
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259 | DO jl = 0, ipr2dj |
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260 | DO ji = 1, jpiglo |
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261 | ijt = jpiglo-ji+1 |
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262 | pt2d(ji,ijpj+jl) = psgn * pt2d(ijt,ijpj-2-jl) |
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263 | END DO |
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264 | END DO |
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265 | DO ji = jpiglo/2+1, jpiglo |
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266 | ijt = jpiglo-ji+1 |
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267 | pt2d(ji,ijpjm1) = psgn * pt2d(ijt,ijpjm1) |
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268 | END DO |
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269 | CASE ( 'F' ) ! F-point |
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270 | DO jl = 0, ipr2dj |
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271 | DO ji = 1, jpiglo-1 |
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272 | iju = jpiglo-ji |
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273 | pt2d(ji,ijpj+jl) = psgn * pt2d(iju,ijpj-2-jl) |
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274 | END DO |
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275 | END DO |
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276 | DO ji = jpiglo/2+1, jpiglo-1 |
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277 | iju = jpiglo-ji |
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278 | pt2d(ji,ijpjm1) = psgn * pt2d(iju,ijpjm1) |
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279 | END DO |
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280 | CASE ( 'I' ) ! ice U-V point (I-point) |
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281 | pt2d( 2 ,ijpj:ijpj+ipr2dj) = 0.e0 |
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282 | DO jl = 0, ipr2dj |
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283 | DO ji = 2 , jpiglo-1 |
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284 | ijt = jpiglo - ji + 2 |
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285 | pt2d(ji,ijpj+jl)= 0.5 * ( pt2d(ji,ijpj-1-jl) + psgn * pt2d(ijt,ijpj-1-jl) ) |
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286 | END DO |
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287 | END DO |
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288 | END SELECT |
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289 | ! |
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290 | CASE DEFAULT ! * closed : the code probably never go through |
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291 | ! |
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292 | SELECT CASE ( cd_type) |
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293 | CASE ( 'T' , 'U' , 'V' , 'W' ) ! T-, U-, V-, W-points |
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294 | pt2d(:, 1:1-ipr2dj ) = 0.e0 |
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295 | pt2d(:,ijpj:ijpj+ipr2dj) = 0.e0 |
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296 | CASE ( 'F' ) ! F-point |
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297 | pt2d(:,ijpj:ijpj+ipr2dj) = 0.e0 |
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298 | CASE ( 'I' ) ! ice U-V point |
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299 | pt2d(:, 1:1-ipr2dj ) = 0.e0 |
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300 | pt2d(:,ijpj:ijpj+ipr2dj) = 0.e0 |
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301 | END SELECT |
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302 | ! |
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303 | END SELECT |
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304 | ! |
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305 | END SUBROUTINE lbc_nfd_2d |
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306 | |
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307 | !!====================================================================== |
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308 | END MODULE lbcnfd |
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