1 | C**** |
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2 | C ************************ |
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3 | C * OASIS MODULE * |
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4 | C * ------------ * |
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5 | C ************************ |
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6 | C**** |
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7 | C*********************************************************************** |
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8 | C This module belongs to the SCRIP library. It is modified to run |
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9 | C within OASIS. |
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10 | C Modifications: |
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11 | C - routine does not read SCRIP grid description files, but gets |
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12 | C arrays from the calling routine |
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13 | C - unit conversion : only from degrees (OASIS unit) to radians |
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14 | C - some allocated array will be freed in the end to allow multiple |
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15 | C calls of SCRIP |
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16 | C - map-methods and restriction-types are written in capital letters |
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17 | C - added bin definition for reduced grid |
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18 | C |
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19 | C Modified by V. Gayler, M&D 20.09.2001 |
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20 | C Modified by D. Declat, CERFACS 27.06.2002 |
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21 | C*********************************************************************** |
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22 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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23 | ! |
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24 | ! This module reads in and initializes two grids for remapping. |
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25 | ! NOTE: grid1 must be the master grid -- the grid that determines |
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26 | ! which cells participate (e.g. land mask) and the fractional |
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27 | ! area of grid2 cells that participate in the remapping. |
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28 | ! |
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29 | !----------------------------------------------------------------------- |
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30 | ! |
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31 | ! CVS:$Id: grids.f,v 1.1.1.1 2005/03/23 16:01:11 adm Exp $ |
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32 | ! |
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33 | ! Copyright (c) 1997, 1998 the Regents of the University of |
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34 | ! California. |
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35 | ! |
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36 | ! This software and ancillary information (herein called software) |
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37 | ! called SCRIP is made available under the terms described here. |
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38 | ! The software has been approved for release with associated |
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39 | ! LA-CC Number 98-45. |
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40 | ! |
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41 | ! Unless otherwise indicated, this software has been authored |
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42 | ! by an employee or employees of the University of California, |
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43 | ! operator of the Los Alamos National Laboratory under Contract |
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44 | ! No. W-7405-ENG-36 with the U.S. Department of Energy. The U.S. |
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45 | ! Government has rights to use, reproduce, and distribute this |
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46 | ! software. The public may copy and use this software without |
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47 | ! charge, provided that this Notice and any statement of authorship |
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48 | ! are reproduced on all copies. Neither the Government nor the |
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49 | ! University makes any warranty, express or implied, or assumes |
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50 | ! any liability or responsibility for the use of this software. |
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51 | ! |
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52 | ! If software is modified to produce derivative works, such modified |
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53 | ! software should be clearly marked, so as not to confuse it with |
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54 | ! the version available from Los Alamos National Laboratory. |
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55 | ! |
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56 | !*********************************************************************** |
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57 | |
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58 | module grids |
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59 | |
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60 | !----------------------------------------------------------------------- |
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61 | |
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62 | use kinds_mod ! defines data types |
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63 | use constants ! common constants |
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64 | use iounits ! I/O unit manager |
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65 | |
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66 | implicit none |
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67 | |
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68 | !----------------------------------------------------------------------- |
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69 | ! |
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70 | ! variables that describe each grid |
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71 | ! |
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72 | !----------------------------------------------------------------------- |
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73 | |
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74 | integer (kind=int_kind), save :: |
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75 | & grid1_size, grid2_size, ! total points on each grid |
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76 | & grid1_rank, grid2_rank, ! rank of each grid |
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77 | & grid1_corners, grid2_corners ! number of corners |
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78 | ! for each grid cell |
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79 | |
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80 | integer (kind=int_kind), dimension(:), allocatable, save :: |
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81 | & grid1_dims, grid2_dims ! size of each grid dimension |
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82 | |
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83 | character(char_len), save :: |
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84 | & grid1_name, grid2_name ! name for each grid |
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85 | |
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86 | character (char_len), save :: |
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87 | & grid1_units, ! units for grid coords (degs/radians) |
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88 | & grid2_units ! units for grid coords |
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89 | |
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90 | real (kind=dbl_kind), parameter :: |
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91 | & deg2rad = pi/180. ! conversion for deg to rads |
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92 | |
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93 | !----------------------------------------------------------------------- |
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94 | ! |
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95 | ! grid coordinates and masks |
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96 | ! |
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97 | !----------------------------------------------------------------------- |
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98 | |
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99 | logical (kind=log_kind), dimension(:), allocatable, save :: |
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100 | & grid1_mask, ! flag which cells participate |
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101 | & grid2_mask ! flag which cells participate |
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102 | |
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103 | real (kind=dbl_kind), dimension(:), allocatable, save :: |
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104 | & grid1_center_lat, ! lat/lon coordinates for |
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105 | & grid1_center_lon, ! each grid center in radians |
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106 | & grid2_center_lat, |
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107 | & grid2_center_lon, |
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108 | & grid1_area, ! tot area of each grid1 cell |
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109 | & grid2_area, ! tot area of each grid2 cell |
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110 | & grid1_area_in, ! area of grid1 cell from file |
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111 | & grid2_area_in, ! area of grid2 cell from file |
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112 | & grid1_frac, ! fractional area of grid cells |
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113 | & grid2_frac ! participating in remapping |
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114 | |
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115 | real (kind=dbl_kind), dimension(:,:), allocatable, save :: |
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116 | & grid1_corner_lat, ! lat/lon coordinates for |
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117 | & grid1_corner_lon, ! each grid corner in radians |
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118 | & grid2_corner_lat, |
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119 | & grid2_corner_lon |
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120 | |
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121 | logical (kind=log_kind), save :: |
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122 | & luse_grid_centers ! use centers for bounding boxes |
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123 | &, luse_grid1_area ! use area from grid file |
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124 | &, luse_grid2_area ! use area from grid file |
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125 | |
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126 | real (kind=dbl_kind), dimension(:,:), allocatable, save :: |
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127 | & grid1_bound_box, ! lat/lon bounding box for use |
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128 | & grid2_bound_box ! in restricting grid searches |
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129 | |
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130 | !----------------------------------------------------------------------- |
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131 | ! |
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132 | ! bins for restricting searches |
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133 | ! |
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134 | !----------------------------------------------------------------------- |
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135 | |
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136 | character (char_len), save :: |
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137 | & restrict_type ! type of bins to use |
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138 | |
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139 | integer (kind=int_kind), save :: |
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140 | & num_srch_bins, ! num of bins for restricted srch |
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141 | & num_srch_red ! num of bins for reduced case |
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142 | |
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143 | integer (kind=int_kind), dimension(:,:), allocatable, save :: |
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144 | & bin_addr1, ! min,max adds for grid1 cells in this lat bin |
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145 | & bin_addr2 ! min,max adds for grid2 cells in this lat bin |
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146 | integer (kind=int_kind), dimension(:,:), allocatable, save :: |
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147 | & bin_addr1_r ! min,max adds for red grid1 cells |
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148 | |
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149 | real(kind=dbl_kind), dimension(:,:), allocatable, save :: |
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150 | & bin_lats ! min,max latitude for each search bin |
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151 | &, bin_lons ! min,max longitude for each search bin |
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152 | real(kind=dbl_kind), dimension(:,:), allocatable, save :: |
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153 | & bin_lats_r ! min,max lat for each search bin for red grid |
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154 | &, bin_lons_r ! min,max lon for each search bin for red grid |
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155 | |
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156 | !*********************************************************************** |
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157 | |
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158 | contains |
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159 | |
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160 | !*********************************************************************** |
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161 | |
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162 | subroutine grid_init(m_method, rst_type, n_srch_bins, |
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163 | $ src_size, dst_size, src_dims, dst_dims, |
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164 | & src_rank, dst_rank, ncrn_src, ncrn_dst, |
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165 | & src_mask, dst_mask, src_name, dst_name, |
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166 | & src_lat, src_lon, dst_lat, dst_lon, |
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167 | & src_corner_lat, src_corner_lon, |
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168 | & dst_corner_lat, dst_corner_lon) |
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169 | |
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170 | !----------------------------------------------------------------------- |
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171 | ! |
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172 | ! this routine gets grid info from routine scriprmp and makes any |
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173 | ! necessary changes (e.g. for 0,2pi longitude range) |
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174 | ! |
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175 | !----------------------------------------------------------------------- |
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176 | |
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177 | !----------------------------------------------------------------------- |
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178 | ! |
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179 | ! input variables |
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180 | ! |
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181 | !----------------------------------------------------------------------- |
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182 | |
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183 | integer (kind=int_kind), intent(in) :: |
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184 | & n_srch_bins, ! num of bins for restricted srch |
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185 | & src_size, ! source grid size |
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186 | & dst_size, ! target grid size |
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187 | & src_rank, ! source grid rank |
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188 | & dst_rank, ! target grid rank |
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189 | & src_dims(src_rank), ! source grid dimensions |
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190 | & dst_dims(dst_rank), ! target grid dimensions |
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191 | & ncrn_src, ! number of corners of a source grid cell |
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192 | & ncrn_dst, ! number of corners of a target grid cell |
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193 | & src_mask(src_size), ! source grid mask (master mask) |
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194 | & dst_mask(dst_size) ! target grid mask |
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195 | |
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196 | character*8, intent(in) :: |
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197 | & m_method, ! remapping method |
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198 | & rst_type, ! restriction type |
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199 | & src_name, ! source grid name |
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200 | & dst_name ! target grid name |
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201 | |
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202 | real (kind=real_kind), intent (in) :: |
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203 | & src_lat(src_size), ! source grid latitudes |
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204 | & src_lon(src_size), ! sourde grid longitudes |
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205 | & dst_lat(dst_size), ! target grid latitudes |
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206 | & dst_lon(dst_size), ! target grid longitudes |
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207 | & src_corner_lat(ncrn_src,src_size), |
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208 | & src_corner_lon(ncrn_src,src_size), |
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209 | & dst_corner_lat(ncrn_dst,dst_size), |
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210 | & dst_corner_lon(ncrn_dst,dst_size) |
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211 | |
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212 | !----------------------------------------------------------------------- |
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213 | ! |
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214 | ! local variables |
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215 | ! |
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216 | !----------------------------------------------------------------------- |
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217 | |
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218 | integer (kind=int_kind) :: |
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219 | & n ! loop counter |
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220 | &, nele ! element loop counter |
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221 | &, i,j ! logical 2d addresses |
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222 | &, ip1,jp1 |
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223 | &, n_add, e_add, ne_add |
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224 | &, nx, ny |
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225 | |
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226 | real (kind=dbl_kind) :: |
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227 | & dlat, dlon ! lat/lon intervals for search bins |
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228 | |
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229 | real (kind=dbl_kind), dimension(4) :: |
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230 | & tmp_lats, tmp_lons ! temps for computing bounding boxes |
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231 | |
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232 | !----------------------------------------------------------------------- |
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233 | ! |
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234 | ! allocate grid coordinates/masks and read data |
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235 | ! |
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236 | !----------------------------------------------------------------------- |
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237 | |
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238 | select case(m_method) |
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239 | case ('CONSERV') |
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240 | luse_grid_centers = .false. |
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241 | case ('BILINEAR') |
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242 | luse_grid_centers = .true. |
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243 | case ('BICUBIC') |
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244 | luse_grid_centers = .true. |
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245 | case ('DISTWGT') |
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246 | luse_grid_centers = .true. |
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247 | case ('GAUSWGT') |
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248 | luse_grid_centers = .true. |
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249 | case default |
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250 | stop 'unknown mapping method' |
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251 | end select |
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252 | |
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253 | allocate( grid1_mask (src_size), |
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254 | & grid2_mask (dst_size), |
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255 | & grid1_center_lat(src_size), |
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256 | & grid1_center_lon(src_size), |
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257 | & grid2_center_lat(dst_size), |
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258 | & grid2_center_lon(dst_size), |
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259 | & grid1_area (src_size), |
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260 | & grid2_area (dst_size), |
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261 | & grid1_frac (src_size), |
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262 | & grid2_frac (dst_size), |
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263 | & grid1_dims (src_rank), |
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264 | & grid2_dims (dst_rank), |
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265 | & grid1_bound_box (4 , src_size), |
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266 | & grid2_bound_box (4 , dst_size)) |
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267 | |
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268 | if (.not. luse_grid_centers) then |
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269 | allocate( grid1_corner_lat(ncrn_src, src_size), |
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270 | & grid1_corner_lon(ncrn_src, src_size), |
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271 | & grid2_corner_lat(ncrn_dst, dst_size), |
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272 | & grid2_corner_lon(ncrn_dst, dst_size)) |
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273 | endif |
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274 | |
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275 | !----------------------------------------------------------------------- |
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276 | ! |
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277 | ! copy input data to module data |
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278 | ! |
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279 | !----------------------------------------------------------------------- |
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280 | |
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281 | restrict_type = rst_type |
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282 | num_srch_bins = n_srch_bins |
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283 | grid1_size = src_size |
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284 | grid2_size = dst_size |
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285 | grid1_dims = src_dims |
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286 | grid2_dims = dst_dims |
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287 | grid1_rank = src_rank |
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288 | grid2_rank = dst_rank |
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289 | grid1_corners = ncrn_src |
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290 | grid2_corners = ncrn_dst |
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291 | grid1_name = src_name |
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292 | grid2_name = dst_name |
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293 | grid1_center_lat = src_lat |
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294 | grid1_center_lon = src_lon |
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295 | grid2_center_lat = dst_lat |
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296 | grid2_center_lon = dst_lon |
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297 | |
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298 | if (.not. luse_grid_centers) then |
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299 | grid1_corner_lat = src_corner_lat |
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300 | grid1_corner_lon = src_corner_lon |
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301 | grid2_corner_lat = dst_corner_lat |
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302 | grid2_corner_lon = dst_corner_lon |
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303 | endif |
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304 | |
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305 | c if (luse_grid1_area) then |
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306 | c grid1_area_in |
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307 | c endif |
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308 | c if (luse_grid2_area) then |
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309 | c grid2_area_in |
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310 | c endif |
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311 | |
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312 | grid1_area = zero |
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313 | grid1_frac = zero |
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314 | grid2_area = zero |
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315 | grid2_frac = zero |
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316 | |
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317 | |
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318 | !----------------------------------------------------------------------- |
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319 | ! |
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320 | ! initialize logical mask and convert lat/lon units if required |
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321 | ! |
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322 | !----------------------------------------------------------------------- |
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323 | where (src_mask == 1) |
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324 | grid1_mask = .true. |
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325 | elsewhere |
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326 | grid1_mask = .false. |
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327 | endwhere |
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328 | |
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329 | where (dst_mask == 1) |
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330 | grid2_mask = .true. |
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331 | elsewhere |
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332 | grid2_mask = .false. |
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333 | endwhere |
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334 | |
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335 | C |
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336 | C* -- convert unit from degrees (OASIS unit) to radians |
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337 | C |
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338 | grid1_center_lat = grid1_center_lat*deg2rad |
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339 | grid1_center_lon = grid1_center_lon*deg2rad |
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340 | grid2_center_lat = grid2_center_lat*deg2rad |
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341 | grid2_center_lon = grid2_center_lon*deg2rad |
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342 | |
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343 | if (.not. luse_grid_centers) then |
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344 | grid1_corner_lat = grid1_corner_lat*deg2rad |
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345 | grid1_corner_lon = grid1_corner_lon*deg2rad |
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346 | grid2_corner_lat = grid2_corner_lat*deg2rad |
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347 | grid2_corner_lon = grid2_corner_lon*deg2rad |
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348 | endif |
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349 | |
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350 | grid1_units='radians' |
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351 | grid2_units='radians' |
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352 | !----------------------------------------------------------------------- |
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353 | ! |
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354 | ! convert longitudes to 0,2pi interval |
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355 | ! |
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356 | !----------------------------------------------------------------------- |
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357 | |
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358 | where (grid1_center_lon .gt. pi2) grid1_center_lon = |
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359 | & grid1_center_lon - pi2 |
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360 | where (grid1_center_lon .lt. zero) grid1_center_lon = |
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361 | & grid1_center_lon + pi2 |
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362 | where (grid2_center_lon .gt. pi2) grid2_center_lon = |
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363 | & grid2_center_lon - pi2 |
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364 | where (grid2_center_lon .lt. zero) grid2_center_lon = |
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365 | & grid2_center_lon + pi2 |
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366 | |
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367 | if (.not. luse_grid_centers) then |
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368 | where (grid1_corner_lon .gt. pi2) grid1_corner_lon = |
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369 | & grid1_corner_lon - pi2 |
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370 | where (grid1_corner_lon .lt. zero) grid1_corner_lon = |
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371 | & grid1_corner_lon + pi2 |
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372 | where (grid2_corner_lon .gt. pi2) grid2_corner_lon = |
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373 | & grid2_corner_lon - pi2 |
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374 | where (grid2_corner_lon .lt. zero) grid2_corner_lon = |
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375 | & grid2_corner_lon + pi2 |
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376 | endif |
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377 | !----------------------------------------------------------------------- |
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378 | ! |
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379 | ! make sure input latitude range is within the machine values |
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380 | ! for +/- pi/2 |
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381 | ! |
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382 | !----------------------------------------------------------------------- |
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383 | |
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384 | where (grid1_center_lat > pih) grid1_center_lat = pih |
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385 | where (grid1_center_lat < -pih) grid1_center_lat = -pih |
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386 | where (grid2_center_lat > pih) grid2_center_lat = pih |
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387 | where (grid2_center_lat < -pih) grid2_center_lat = -pih |
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388 | |
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389 | if (.not. luse_grid_centers) then |
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390 | where (grid1_corner_lat > pih) grid1_corner_lat = pih |
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391 | where (grid1_corner_lat < -pih) grid1_corner_lat = -pih |
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392 | where (grid2_corner_lat > pih) grid2_corner_lat = pih |
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393 | where (grid2_corner_lat < -pih) grid2_corner_lat = -pih |
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394 | endif |
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395 | |
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396 | !----------------------------------------------------------------------- |
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397 | ! |
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398 | ! compute bounding boxes for restricting future grid searches |
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399 | ! |
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400 | !----------------------------------------------------------------------- |
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401 | |
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402 | if (.not. luse_grid_centers) then |
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403 | |
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404 | grid1_bound_box(1,:) = minval(grid1_corner_lat, DIM=1) |
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405 | grid1_bound_box(2,:) = maxval(grid1_corner_lat, DIM=1) |
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406 | grid1_bound_box(3,:) = minval(grid1_corner_lon, DIM=1) |
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407 | grid1_bound_box(4,:) = maxval(grid1_corner_lon, DIM=1) |
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408 | |
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409 | grid2_bound_box(1,:) = minval(grid2_corner_lat, DIM=1) |
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410 | grid2_bound_box(2,:) = maxval(grid2_corner_lat, DIM=1) |
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411 | grid2_bound_box(3,:) = minval(grid2_corner_lon, DIM=1) |
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412 | grid2_bound_box(4,:) = maxval(grid2_corner_lon, DIM=1) |
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413 | else |
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414 | |
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415 | nx = grid1_dims(1) |
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416 | ny = grid1_dims(2) |
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417 | |
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418 | do n=1,grid1_size |
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419 | |
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420 | !*** find N,S and NE points to this grid point |
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421 | |
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422 | j = (n - 1)/nx +1 |
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423 | i = n - (j-1)*nx |
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424 | |
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425 | if (i < nx) then |
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426 | ip1 = i + 1 |
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427 | else |
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428 | !*** assume cyclic |
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429 | ip1 = 1 |
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430 | !*** but if it is not, correct |
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431 | e_add = (j - 1)*nx + ip1 |
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432 | if (abs(grid1_center_lat(e_add) - |
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433 | & grid1_center_lat(n )) > pih) then |
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434 | ip1 = i |
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435 | endif |
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436 | endif |
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437 | |
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438 | if (j < ny) then |
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439 | jp1 = j+1 |
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440 | else |
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441 | !*** assume cyclic |
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442 | jp1 = 1 |
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443 | !*** but if it is not, correct |
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444 | n_add = (jp1 - 1)*nx + i |
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445 | if (abs(grid1_center_lat(n_add) - |
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446 | & grid1_center_lat(n )) > pih) then |
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447 | jp1 = j |
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448 | endif |
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449 | endif |
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450 | |
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451 | n_add = (jp1 - 1)*nx + i |
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452 | e_add = (j - 1)*nx + ip1 |
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453 | ne_add = (jp1 - 1)*nx + ip1 |
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454 | |
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455 | !*** find N,S and NE lat/lon coords and check bounding box |
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456 | |
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457 | tmp_lats(1) = grid1_center_lat(n) |
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458 | tmp_lats(2) = grid1_center_lat(e_add) |
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459 | tmp_lats(3) = grid1_center_lat(ne_add) |
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460 | tmp_lats(4) = grid1_center_lat(n_add) |
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461 | |
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462 | tmp_lons(1) = grid1_center_lon(n) |
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463 | tmp_lons(2) = grid1_center_lon(e_add) |
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464 | tmp_lons(3) = grid1_center_lon(ne_add) |
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465 | tmp_lons(4) = grid1_center_lon(n_add) |
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466 | |
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467 | grid1_bound_box(1,n) = minval(tmp_lats) |
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468 | grid1_bound_box(2,n) = maxval(tmp_lats) |
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469 | grid1_bound_box(3,n) = minval(tmp_lons) |
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470 | grid1_bound_box(4,n) = maxval(tmp_lons) |
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471 | end do |
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472 | |
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473 | nx = grid2_dims(1) |
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474 | ny = grid2_dims(2) |
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475 | |
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476 | do n=1,grid2_size |
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477 | |
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478 | !*** find N,S and NE points to this grid point |
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479 | |
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480 | j = (n - 1)/nx +1 |
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481 | i = n - (j-1)*nx |
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482 | |
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483 | if (i < nx) then |
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484 | ip1 = i + 1 |
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485 | else |
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486 | !*** assume cyclic |
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487 | ip1 = 1 |
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488 | !*** but if it is not, correct |
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489 | e_add = (j - 1)*nx + ip1 |
---|
490 | if (abs(grid2_center_lat(e_add) - |
---|
491 | & grid2_center_lat(n )) > pih) then |
---|
492 | ip1 = i |
---|
493 | endif |
---|
494 | endif |
---|
495 | |
---|
496 | if (j < ny) then |
---|
497 | jp1 = j+1 |
---|
498 | else |
---|
499 | !*** assume cyclic |
---|
500 | jp1 = 1 |
---|
501 | !*** but if it is not, correct |
---|
502 | n_add = (jp1 - 1)*nx + i |
---|
503 | if (abs(grid2_center_lat(n_add) - |
---|
504 | & grid2_center_lat(n )) > pih) then |
---|
505 | jp1 = j |
---|
506 | endif |
---|
507 | endif |
---|
508 | |
---|
509 | n_add = (jp1 - 1)*nx + i |
---|
510 | e_add = (j - 1)*nx + ip1 |
---|
511 | ne_add = (jp1 - 1)*nx + ip1 |
---|
512 | |
---|
513 | !*** find N,S and NE lat/lon coords and check bounding box |
---|
514 | |
---|
515 | tmp_lats(1) = grid2_center_lat(n) |
---|
516 | tmp_lats(2) = grid2_center_lat(e_add) |
---|
517 | tmp_lats(3) = grid2_center_lat(ne_add) |
---|
518 | tmp_lats(4) = grid2_center_lat(n_add) |
---|
519 | |
---|
520 | tmp_lons(1) = grid2_center_lon(n) |
---|
521 | tmp_lons(2) = grid2_center_lon(e_add) |
---|
522 | tmp_lons(3) = grid2_center_lon(ne_add) |
---|
523 | tmp_lons(4) = grid2_center_lon(n_add) |
---|
524 | |
---|
525 | grid2_bound_box(1,n) = minval(tmp_lats) |
---|
526 | grid2_bound_box(2,n) = maxval(tmp_lats) |
---|
527 | grid2_bound_box(3,n) = minval(tmp_lons) |
---|
528 | grid2_bound_box(4,n) = maxval(tmp_lons) |
---|
529 | end do |
---|
530 | |
---|
531 | endif |
---|
532 | |
---|
533 | where (abs(grid1_bound_box(4,:) - grid1_bound_box(3,:)) > pi) |
---|
534 | grid1_bound_box(3,:) = zero |
---|
535 | grid1_bound_box(4,:) = pi2 |
---|
536 | end where |
---|
537 | |
---|
538 | where (abs(grid2_bound_box(4,:) - grid2_bound_box(3,:)) > pi) |
---|
539 | grid2_bound_box(3,:) = zero |
---|
540 | grid2_bound_box(4,:) = pi2 |
---|
541 | end where |
---|
542 | |
---|
543 | !*** |
---|
544 | !*** try to check for cells that overlap poles |
---|
545 | !*** |
---|
546 | |
---|
547 | where (grid1_center_lat > grid1_bound_box(2,:)) |
---|
548 | & grid1_bound_box(2,:) = pih |
---|
549 | |
---|
550 | where (grid1_center_lat < grid1_bound_box(1,:)) |
---|
551 | & grid1_bound_box(1,:) = -pih |
---|
552 | |
---|
553 | where (grid2_center_lat > grid2_bound_box(2,:)) |
---|
554 | & grid2_bound_box(2,:) = pih |
---|
555 | |
---|
556 | where (grid2_center_lat < grid2_bound_box(1,:)) |
---|
557 | & grid2_bound_box(1,:) = -pih |
---|
558 | |
---|
559 | !----------------------------------------------------------------------- |
---|
560 | ! |
---|
561 | ! set up and assign address ranges to search bins in order to |
---|
562 | ! further restrict later searches |
---|
563 | ! |
---|
564 | !----------------------------------------------------------------------- |
---|
565 | |
---|
566 | select case (restrict_type) |
---|
567 | |
---|
568 | case ('LATITUDE') |
---|
569 | write(stdout,*) 'Using latitude bins to restrict search.' |
---|
570 | |
---|
571 | allocate(bin_addr1(2,num_srch_bins)) |
---|
572 | allocate(bin_addr2(2,num_srch_bins)) |
---|
573 | allocate(bin_lats (2,num_srch_bins)) |
---|
574 | allocate(bin_lons (2,num_srch_bins)) |
---|
575 | |
---|
576 | dlat = pi/num_srch_bins |
---|
577 | |
---|
578 | do n=1,num_srch_bins |
---|
579 | bin_lats(1,n) = (n-1)*dlat - pih |
---|
580 | bin_lats(2,n) = n*dlat - pih |
---|
581 | bin_lons(1,n) = zero |
---|
582 | bin_lons(2,n) = pi2 |
---|
583 | bin_addr1(1,n) = grid1_size + 1 |
---|
584 | bin_addr1(2,n) = 0 |
---|
585 | bin_addr2(1,n) = grid2_size + 1 |
---|
586 | bin_addr2(2,n) = 0 |
---|
587 | end do |
---|
588 | |
---|
589 | do nele=1,grid1_size |
---|
590 | do n=1,num_srch_bins |
---|
591 | if (grid1_bound_box(1,nele) <= bin_lats(2,n) .and. |
---|
592 | & grid1_bound_box(2,nele) >= bin_lats(1,n)) then |
---|
593 | bin_addr1(1,n) = min(nele,bin_addr1(1,n)) |
---|
594 | bin_addr1(2,n) = max(nele,bin_addr1(2,n)) |
---|
595 | endif |
---|
596 | end do |
---|
597 | end do |
---|
598 | |
---|
599 | do nele=1,grid2_size |
---|
600 | do n=1,num_srch_bins |
---|
601 | if (grid2_bound_box(1,nele) <= bin_lats(2,n) .and. |
---|
602 | & grid2_bound_box(2,nele) >= bin_lats(1,n)) then |
---|
603 | bin_addr2(1,n) = min(nele,bin_addr2(1,n)) |
---|
604 | bin_addr2(2,n) = max(nele,bin_addr2(2,n)) |
---|
605 | endif |
---|
606 | end do |
---|
607 | end do |
---|
608 | |
---|
609 | case ('LATLON') |
---|
610 | write(stdout,*) 'Using lat/lon boxes to restrict search.' |
---|
611 | |
---|
612 | dlat = pi /num_srch_bins |
---|
613 | dlon = pi2/num_srch_bins |
---|
614 | |
---|
615 | allocate(bin_addr1(2,num_srch_bins*num_srch_bins)) |
---|
616 | allocate(bin_addr2(2,num_srch_bins*num_srch_bins)) |
---|
617 | allocate(bin_lats (2,num_srch_bins*num_srch_bins)) |
---|
618 | allocate(bin_lons (2,num_srch_bins*num_srch_bins)) |
---|
619 | |
---|
620 | n = 0 |
---|
621 | do j=1,num_srch_bins |
---|
622 | do i=1,num_srch_bins |
---|
623 | n = n + 1 |
---|
624 | |
---|
625 | bin_lats(1,n) = (j-1)*dlat - pih |
---|
626 | bin_lats(2,n) = j*dlat - pih |
---|
627 | bin_lons(1,n) = (i-1)*dlon |
---|
628 | bin_lons(2,n) = i*dlon |
---|
629 | bin_addr1(1,n) = grid1_size + 1 |
---|
630 | bin_addr1(2,n) = 0 |
---|
631 | bin_addr2(1,n) = grid2_size + 1 |
---|
632 | bin_addr2(2,n) = 0 |
---|
633 | end do |
---|
634 | end do |
---|
635 | |
---|
636 | num_srch_bins = num_srch_bins**2 |
---|
637 | |
---|
638 | do nele=1,grid1_size |
---|
639 | do n=1,num_srch_bins |
---|
640 | if (grid1_bound_box(1,nele) <= bin_lats(2,n) .and. |
---|
641 | & grid1_bound_box(2,nele) >= bin_lats(1,n) .and. |
---|
642 | & grid1_bound_box(3,nele) <= bin_lons(2,n) .and. |
---|
643 | & grid1_bound_box(4,nele) >= bin_lons(1,n)) then |
---|
644 | bin_addr1(1,n) = min(nele,bin_addr1(1,n)) |
---|
645 | bin_addr1(2,n) = max(nele,bin_addr1(2,n)) |
---|
646 | endif |
---|
647 | end do |
---|
648 | end do |
---|
649 | |
---|
650 | do nele=1,grid2_size |
---|
651 | do n=1,num_srch_bins |
---|
652 | if (grid2_bound_box(1,nele) <= bin_lats(2,n) .and. |
---|
653 | & grid2_bound_box(2,nele) >= bin_lats(1,n) .and. |
---|
654 | & grid2_bound_box(3,nele) <= bin_lons(2,n) .and. |
---|
655 | & grid2_bound_box(4,nele) >= bin_lons(1,n)) then |
---|
656 | bin_addr2(1,n) = min(nele,bin_addr2(1,n)) |
---|
657 | bin_addr2(2,n) = max(nele,bin_addr2(2,n)) |
---|
658 | endif |
---|
659 | end do |
---|
660 | end do |
---|
661 | |
---|
662 | case ('REDUCED') |
---|
663 | write(stdout,*) |
---|
664 | & '| Using reduced bins to restrict search. Reduced grids with' |
---|
665 | write(stdout,*) |
---|
666 | & '| a maximum of 500*NBRBINS latitude circles can be treated' |
---|
667 | |
---|
668 | allocate(bin_addr2(2,num_srch_bins)) |
---|
669 | allocate(bin_lats (2,num_srch_bins)) |
---|
670 | allocate(bin_lons (2,num_srch_bins)) |
---|
671 | allocate(bin_addr1_r(4,500*num_srch_bins)) |
---|
672 | allocate(bin_lats_r (2,500*num_srch_bins)) |
---|
673 | allocate(bin_lons_r (2,500*num_srch_bins)) |
---|
674 | |
---|
675 | dlat = pi/num_srch_bins |
---|
676 | |
---|
677 | do n=1,num_srch_bins |
---|
678 | bin_lats(1,n) = (n-1)*dlat - pih |
---|
679 | bin_lats(2,n) = n*dlat - pih |
---|
680 | bin_lons(1,n) = zero |
---|
681 | bin_lons(2,n) = pi2 |
---|
682 | bin_addr2(1,n) = grid2_size + 1 |
---|
683 | bin_addr2(2,n) = 0 |
---|
684 | end do |
---|
685 | |
---|
686 | do nele=1,grid2_size |
---|
687 | do n=1,num_srch_bins |
---|
688 | if (grid2_bound_box(1,nele) <= bin_lats(2,n) .and. |
---|
689 | & grid2_bound_box(2,nele) >= bin_lats(1,n)) then |
---|
690 | bin_addr2(1,n) = min(nele,bin_addr2(1,n)) |
---|
691 | bin_addr2(2,n) = max(nele,bin_addr2(2,n)) |
---|
692 | endif |
---|
693 | end do |
---|
694 | end DO |
---|
695 | |
---|
696 | |
---|
697 | bin_addr1_r(1,1) = 0 |
---|
698 | bin_lats_r(1,1) = grid1_center_lat(1) |
---|
699 | num_srch_red = 1 |
---|
700 | do nele=1,grid1_size-1 |
---|
701 | if (grid1_center_lat(nele+1) == |
---|
702 | & grid1_center_lat(nele)) THEN |
---|
703 | bin_addr1_r(2,num_srch_red) = nele+1 |
---|
704 | else IF (grid1_center_lat(nele+1) /= |
---|
705 | & grid1_center_lat(nele)) THEN |
---|
706 | bin_addr1_r(1,num_srch_red+1) = nele+1 |
---|
707 | bin_lats_r(2,num_srch_red) = grid1_center_lat(nele+1) |
---|
708 | bin_lats_r(1,num_srch_red+1) = |
---|
709 | & bin_lats_r(2,num_srch_red) |
---|
710 | num_srch_red = num_srch_red+1 |
---|
711 | ENDIF |
---|
712 | end DO |
---|
713 | |
---|
714 | DO nele = 1,num_srch_red-1 |
---|
715 | bin_addr1_r(3,nele)=bin_addr1_r(1,nele+1) |
---|
716 | bin_addr1_r(4,nele)=bin_addr1_r(2,nele+1) |
---|
717 | enddo |
---|
718 | bin_addr1_r(3,num_srch_red) = bin_addr1_r(1,num_srch_red-1) |
---|
719 | bin_addr1_r(4,num_srch_red) = bin_addr1_r(2,num_srch_red-1) |
---|
720 | |
---|
721 | case default |
---|
722 | stop 'unknown search restriction method' |
---|
723 | end select |
---|
724 | |
---|
725 | !----------------------------------------------------------------------- |
---|
726 | |
---|
727 | end subroutine grid_init |
---|
728 | |
---|
729 | !*********************************************************************** |
---|
730 | |
---|
731 | subroutine free_grids |
---|
732 | |
---|
733 | !----------------------------------------------------------------------- |
---|
734 | ! |
---|
735 | ! subroutine to deallocate allocated arrays |
---|
736 | ! |
---|
737 | !----------------------------------------------------------------------- |
---|
738 | |
---|
739 | deallocate(grid1_mask, grid2_mask, |
---|
740 | & grid1_center_lat, grid1_center_lon, |
---|
741 | & grid2_center_lat, grid2_center_lon, |
---|
742 | & grid1_area, grid2_area, |
---|
743 | & grid1_frac, grid2_frac, |
---|
744 | & grid1_dims, grid2_dims) |
---|
745 | |
---|
746 | IF (restrict_TYPE == 'REDUCED') then |
---|
747 | deallocate( grid1_bound_box, grid2_bound_box, |
---|
748 | & bin_addr1_r, bin_addr2, |
---|
749 | & bin_lons, bin_lats, |
---|
750 | & bin_lats_r, bin_lons_r) |
---|
751 | else |
---|
752 | deallocate( grid1_bound_box, grid2_bound_box, |
---|
753 | & bin_addr1, bin_addr2, |
---|
754 | & bin_lats, bin_lons) |
---|
755 | endif |
---|
756 | |
---|
757 | if (.not. luse_grid_centers) then |
---|
758 | deallocate(grid1_corner_lat, grid1_corner_lon, |
---|
759 | & grid2_corner_lat, grid2_corner_lon) |
---|
760 | endif |
---|
761 | |
---|
762 | !----------------------------------------------------------------------- |
---|
763 | |
---|
764 | end subroutine free_grids |
---|
765 | |
---|
766 | !*********************************************************************** |
---|
767 | |
---|
768 | end module grids |
---|
769 | |
---|
770 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
---|
771 | |
---|