1 | program expandstartfi |
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2 | |
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3 | ! program which takes a GCM startfi.nc file and puts it on the |
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4 | ! corresponding lonxlat grid (so it can be displayed using Grads, Ferret, etc.) |
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5 | ! usage: |
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6 | ! expandstartfi [infile.nc] [outfile.nc] |
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7 | ! if outfile is not specified it is built as "infile_ex.nc" |
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8 | ! if infile is not specified, "startfi.nc" is used as default |
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9 | |
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10 | use netcdf |
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11 | implicit none |
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12 | |
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13 | ! Input and output files: |
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14 | character(len=256) :: infile="startfi.nc" ! default input file |
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15 | character(len=256) :: outfile="startfi_ex.nc" ! default output file |
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16 | |
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17 | ! NetCDF stuff |
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18 | integer :: status ! NetCDF return code |
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19 | integer :: inid,outid ! NetCDF file IDs |
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20 | integer :: varid ! to store the ID of a variable |
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21 | integer :: datashape(4) ! to store dimension IDs of a given dataset |
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22 | character(len=90) :: varname ! name of a variable |
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23 | character(len=90) :: varatt ! name of attribute of a variable |
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24 | character(len=90) :: varattcontent ! content of the attribute |
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25 | ! Input file dimension IDs: |
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26 | integer :: physical_points_dimid |
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27 | integer :: subsurface_layers_dimid |
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28 | integer :: nlayer_plus_1_dimid |
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29 | integer :: number_of_advected_fields_dimid |
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30 | integer :: nbindims ! number of dimensions in input file |
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31 | integer :: nbinvars ! number of variables in input file |
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32 | integer :: invarid ! to store ID of an input variable |
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33 | !Input file variables |
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34 | integer :: physical_points |
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35 | integer :: subsurface_layers |
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36 | integer :: nlayer_plus_1 |
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37 | integer :: number_of_advected_fields |
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38 | real,allocatable :: surf_field(:) ! to store a 1D field of physical_points elements |
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39 | real,allocatable :: subsurf_field(:,:) ! to store subsurface (2D field) |
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40 | |
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41 | ! Output file dimensions: |
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42 | integer :: latlen |
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43 | integer :: lonlen |
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44 | ! Output file variables: |
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45 | real,allocatable :: longitude(:) |
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46 | real,allocatable :: latitude(:) |
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47 | real,allocatable :: depth(:) |
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48 | real,allocatable :: out_surf_field(:,:) |
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49 | real,allocatable :: out_subsurf_field(:,:,:) |
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50 | ! Output file dimension IDs |
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51 | integer :: lon_dimid |
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52 | integer :: lat_dimid |
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53 | integer :: depth_dimid |
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54 | ! IDs of Output file variables |
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55 | integer :: lon_varid |
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56 | integer :: lat_varid |
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57 | integer :: depth_varid |
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58 | |
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59 | integer :: i,j,k,ig0,ivar |
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60 | integer :: nbdim,nbatt,shape(4) |
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61 | integer :: nbarg ! # of program arguments |
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62 | character(len=256) :: arg ! to store a program argument |
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63 | real :: pi ! 3.14159... |
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64 | |
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65 | pi=2.*asin(1.) |
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66 | |
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67 | ! 0. Preliminary stuff, check arguments (input and output files) |
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68 | ! get number of arguments this program was called with |
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69 | nbarg=command_argument_count() |
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70 | |
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71 | if (nbarg.ge.1) then |
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72 | call get_command_argument(1,arg) ! get argument # 1 |
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73 | infile=trim(arg) |
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74 | if (nbarg.eq.2) then |
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75 | call get_command_argument(2,arg) ! get argument # 2 |
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76 | outfile=trim(arg) |
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77 | else |
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78 | ! build outfile from infile (replace ".nc" with "_ex.nc" |
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79 | outfile=trim(infile(1:index(infile,".nc",back=.true.)-1))//"_ex.nc" |
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80 | endif |
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81 | if (nbarg.ge.3) then |
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82 | write(*,*) ' Warning: Too many arguments...' |
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83 | write(*,*) ' will only use the first 2 ' |
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84 | endif |
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85 | endif |
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86 | |
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87 | ! 1. open input file |
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88 | status=nf90_open(infile,NF90_NOWRITE,inid) |
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89 | if (status.ne.nf90_noerr) then |
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90 | write(*,*)"Failed to open datafile ",trim(infile) |
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91 | write(*,*)trim(nf90_strerror(status)) |
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92 | stop |
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93 | endif |
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94 | write(*,*) "Reading input file: ",trim(infile) |
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95 | |
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96 | ! 1.2 Identify/load dimensions in input file |
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97 | status=nf90_inq_dimid(inid,"physical_points",physical_points_dimid) |
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98 | if (status.ne.nf90_noerr) then |
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99 | write(*,*)"Failed to find physical_points dimension" |
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100 | write(*,*)trim(nf90_strerror(status)) |
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101 | stop |
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102 | endif |
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103 | status=nf90_inquire_dimension(inid,physical_points_dimid,len=physical_points) |
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104 | if (status.ne.nf90_noerr) then |
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105 | write(*,*)"Failed to find physical_points value" |
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106 | write(*,*)trim(nf90_strerror(status)) |
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107 | stop |
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108 | else |
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109 | write(*,*) " physical_points = ",physical_points |
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110 | endif |
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111 | |
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112 | status=nf90_inq_dimid(inid,"subsurface_layers",subsurface_layers_dimid) |
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113 | if (status.ne.nf90_noerr) then |
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114 | write(*,*)"Failed to find subsurface_layers dimension" |
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115 | write(*,*)trim(nf90_strerror(status)) |
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116 | stop |
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117 | endif |
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118 | status=nf90_inquire_dimension(inid,subsurface_layers_dimid,len=subsurface_layers) |
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119 | if (status.ne.nf90_noerr) then |
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120 | write(*,*)"Failed to find subsurface_layers value" |
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121 | write(*,*)trim(nf90_strerror(status)) |
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122 | stop |
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123 | else |
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124 | write(*,*) " subsurface_layers = ",subsurface_layers |
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125 | endif |
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126 | |
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127 | status=nf90_inq_dimid(inid,"nlayer_plus_1",nlayer_plus_1_dimid) |
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128 | if (status.ne.nf90_noerr) then |
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129 | write(*,*)"Failed to find nlayer_plus_1 dimension" |
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130 | write(*,*)trim(nf90_strerror(status)) |
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131 | stop |
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132 | endif |
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133 | status=nf90_inquire_dimension(inid,nlayer_plus_1_dimid,len=nlayer_plus_1) |
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134 | if (status.ne.nf90_noerr) then |
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135 | write(*,*)"Failed to find nlayer_plus_1 value" |
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136 | write(*,*)trim(nf90_strerror(status)) |
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137 | stop |
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138 | else |
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139 | write(*,*) " nlayer_plus_1 = ",nlayer_plus_1 |
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140 | endif |
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141 | |
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142 | status=nf90_inq_dimid(inid,"number_of_advected_fields",number_of_advected_fields_dimid) |
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143 | if (status.ne.nf90_noerr) then |
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144 | write(*,*)"Failed to find number_of_advected_fields dimension" |
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145 | write(*,*)trim(nf90_strerror(status)) |
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146 | stop |
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147 | endif |
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148 | status=nf90_inquire_dimension(inid,number_of_advected_fields_dimid,len=number_of_advected_fields) |
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149 | if (status.ne.nf90_noerr) then |
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150 | write(*,*)"Failed to find number_of_advected_fields value" |
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151 | write(*,*)trim(nf90_strerror(status)) |
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152 | stop |
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153 | else |
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154 | write(*,*) " number_of_advected_fields = ",number_of_advected_fields |
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155 | endif |
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156 | |
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157 | ! 1.3 Allocate memory for input fields |
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158 | allocate(surf_field(physical_points)) |
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159 | allocate(subsurf_field(physical_points,subsurface_layers)) |
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160 | |
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161 | ! 2.1. Create output file |
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162 | status=nf90_create(outfile,NF90_CLOBBER,outid) |
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163 | if (status.ne.nf90_noerr) then |
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164 | write(*,*) "Failed to create output file: ",trim(outfile) |
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165 | write(*,*)trim(nf90_strerror(status)) |
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166 | stop |
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167 | endif |
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168 | write(*,*) " " |
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169 | write(*,*) "Created output file: ",trim(outfile) |
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170 | |
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171 | ! 2.2. Build dimensions for output file |
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172 | |
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173 | ! 2.2.1 Compute lonlen and latlen from physical_points |
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174 | ! load "longitude(physical_points)" from input file |
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175 | status=nf90_inq_varid(inid,"longitude",varid) |
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176 | if (status.ne.nf90_noerr) then |
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177 | write(*,*) "Failed to find longitude ID" |
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178 | write(*,*)trim(nf90_strerror(status)) |
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179 | stop |
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180 | endif |
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181 | ! read longitude |
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182 | status=nf90_get_var(inid,varid,surf_field) |
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183 | if (status.ne.nf90_noerr) then |
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184 | write(*,*) "Failed to load longitude" |
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185 | write(*,*)trim(nf90_strerror(status)) |
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186 | stop |
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187 | endif |
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188 | |
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189 | ! count the number of points before longitude(i) wraps around |
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190 | i=3 |
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191 | lonlen=1 |
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192 | !write(*,*) "longitude(2)=",surf_field(2) |
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193 | do while (surf_field(i).ne.surf_field(2)) |
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194 | !write(*,*) "i:",i,"surf_field(i)=",surf_field(i) |
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195 | i=i+1 |
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196 | lonlen=lonlen+1 |
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197 | enddo |
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198 | ! and add 1 because we want a redundant lon=180 point |
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199 | lonlen=lonlen+1 |
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200 | write(*,*) " => lonlen=",lonlen |
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201 | |
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202 | allocate(longitude(lonlen)) |
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203 | ! fill longitude(1:lonlen) |
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204 | longitude(1:lonlen-1)=surf_field(2:lonlen) |
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205 | longitude(lonlen)=-longitude(1) ! redundant +Pi/2 |
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206 | ! convert to degrees |
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207 | longitude(:)=longitude(:)*(180./pi) |
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208 | |
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209 | ! knowing lonlen, compute latlen |
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210 | latlen=2+(physical_points-2)/(lonlen-1) |
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211 | write(*,*) " => latlen=",latlen |
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212 | |
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213 | allocate(latitude(latlen)) |
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214 | ! get field "latitude(physical_points)" from infile |
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215 | status=nf90_inq_varid(inid,"latitude",varid) |
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216 | if (status.ne.nf90_noerr) then |
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217 | write(*,*) "Failed to find latitude ID" |
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218 | write(*,*)trim(nf90_strerror(status)) |
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219 | stop |
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220 | endif |
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221 | ! read latitude |
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222 | status=nf90_get_var(inid,varid,surf_field) |
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223 | if (status.ne.nf90_noerr) then |
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224 | write(*,*) "Failed to load latitude" |
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225 | write(*,*)trim(nf90_strerror(status)) |
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226 | stop |
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227 | endif |
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228 | |
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229 | latitude(1)=surf_field(1) |
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230 | !write(*,*) "latitude(1)=",latitude(1) |
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231 | do i=2,latlen-1 |
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232 | latitude(i)=surf_field((i-1)*(lonlen-1)) |
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233 | ! write(*,*) "i:",i,"latitude(i)=",latitude(i) |
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234 | enddo |
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235 | latitude(latlen)=surf_field(physical_points) |
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236 | !write(*,*) "latitude(latlen)=",latitude(latlen) |
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237 | ! convert to degrees |
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238 | latitude(:)=latitude(:)*(180./pi) |
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239 | |
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240 | ! depth: |
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241 | allocate(depth(subsurface_layers)) |
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242 | ! load "soildepth(subsurface_layers)" from input file |
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243 | status=nf90_inq_varid(inid,"soildepth",varid) |
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244 | if (status.ne.nf90_noerr) then |
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245 | write(*,*) "Failed to find soildepth ID" |
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246 | write(*,*)trim(nf90_strerror(status)) |
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247 | stop |
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248 | endif |
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249 | ! read longitude |
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250 | status=nf90_get_var(inid,varid,depth) |
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251 | if (status.ne.nf90_noerr) then |
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252 | write(*,*) "Failed to load soildepth" |
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253 | write(*,*)trim(nf90_strerror(status)) |
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254 | stop |
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255 | endif |
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256 | |
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257 | ! 2.2.2 define dimensions to output file |
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258 | ! longitude: |
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259 | status=nf90_def_dim(outid,"longitude",lonlen,lon_dimid) |
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260 | if (status.ne.nf90_noerr) then |
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261 | write(*,*) "Failed creating longitude dimension" |
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262 | write(*,*)trim(nf90_strerror(status)) |
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263 | stop |
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264 | endif |
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265 | ! latitude: |
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266 | status=nf90_def_dim(outid,"latitude",latlen,lat_dimid) |
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267 | if (status.ne.nf90_noerr) then |
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268 | write(*,*) "Failed creating longitude dimension" |
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269 | write(*,*)trim(nf90_strerror(status)) |
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270 | stop |
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271 | endif |
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272 | ! depth: |
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273 | status=nf90_def_dim(outid,"depth",subsurface_layers,depth_dimid) |
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274 | if (status.ne.nf90_noerr) then |
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275 | write(*,*) "Failed creating depth dimension" |
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276 | write(*,*)trim(nf90_strerror(status)) |
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277 | stop |
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278 | endif |
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279 | |
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280 | !2.3. write variables to output file |
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281 | ! 2.3.1. define 1D variables |
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282 | ! longitude |
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283 | datashape(1)=lon_dimid |
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284 | status=nf90_def_var(outid,"longitude",NF90_REAL,lon_dimid,lon_varid) |
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285 | if (status.ne.nf90_noerr) then |
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286 | write(*,*) "Failed creating longitude variable" |
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287 | write(*,*)trim(nf90_strerror(status)) |
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288 | stop |
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289 | endif |
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290 | ! longitude attributes |
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291 | status=nf90_put_att(outid,lon_varid,"long_name","East longitude") |
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292 | status=nf90_put_att(outid,lon_varid,"units","degrees_east") |
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293 | |
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294 | !latitude |
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295 | datashape(2)=lat_dimid |
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296 | status=nf90_def_var(outid,"latitude",NF90_REAL,lat_dimid,lat_varid) |
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297 | if (status.ne.nf90_noerr) then |
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298 | write(*,*) "Failed creating latitude variable" |
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299 | write(*,*)trim(nf90_strerror(status)) |
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300 | stop |
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301 | endif |
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302 | ! latitude attributes |
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303 | status=nf90_put_att(outid,lat_varid,"long_name","North latitude") |
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304 | status=nf90_put_att(outid,lat_varid,"units","degrees_north") |
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305 | |
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306 | ! depth |
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307 | status=nf90_def_var(outid,"depth",NF90_REAL,depth_dimid,depth_varid) |
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308 | if (status.ne.nf90_noerr) then |
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309 | write(*,*) "Failed creating depth variable" |
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310 | write(*,*)trim(nf90_strerror(status)) |
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311 | stop |
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312 | endif |
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313 | !depth atributes |
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314 | status=nf90_put_att(outid,depth_varid,"long_name","Soil mid-layer depth") |
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315 | status=nf90_put_att(outid,depth_varid,"units","m") |
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316 | status=nf90_put_att(outid,depth_varid,"positive","down") |
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317 | |
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318 | ! 2.3.2 write 1D variable |
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319 | |
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320 | ! swich out of NetCDF define mode |
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321 | status=nf90_enddef(outid) |
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322 | if (status.ne.nf90_noerr) then |
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323 | write(*,*) "Failed to swich out of define mode" |
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324 | write(*,*)trim(nf90_strerror(status)) |
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325 | stop |
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326 | endif |
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327 | |
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328 | ! write longitude |
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329 | status=nf90_put_var(outid,lon_varid,longitude) |
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330 | if (status.ne.nf90_noerr) then |
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331 | write(*,*) "Failed writing longitude" |
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332 | write(*,*)trim(nf90_strerror(status)) |
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333 | stop |
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334 | endif |
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335 | |
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336 | ! write latitude |
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337 | status=nf90_put_var(outid,lat_varid,latitude) |
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338 | if (status.ne.nf90_noerr) then |
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339 | write(*,*) "Failed writing latitude" |
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340 | write(*,*)trim(nf90_strerror(status)) |
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341 | stop |
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342 | endif |
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343 | |
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344 | ! write depth |
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345 | status=nf90_put_var(outid,depth_varid,depth) |
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346 | if (status.ne.nf90_noerr) then |
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347 | write(*,*) "Failed writing depth" |
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348 | write(*,*)trim(nf90_strerror(status)) |
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349 | stop |
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350 | endif |
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351 | |
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352 | ! 2.3. 2D (surface) variables |
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353 | ! First find out how many variables there are in input file |
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354 | status=nf90_inquire(inid,nbindims,nbinvars) |
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355 | if (status.ne.nf90_noerr) then |
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356 | write(*,*) "Failed obtaining nbindims and nbinvars from input file" |
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357 | write(*,*)trim(nf90_strerror(status)) |
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358 | stop |
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359 | endif |
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360 | |
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361 | allocate(out_surf_field(lonlen,latlen)) |
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362 | |
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363 | do ivar=1,nbinvars ! loop on all input variables |
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364 | ! find out what dimensions are linked to this variable |
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365 | status=nf90_inquire_variable(inid,ivar,name=varname,ndims=nbdim,& |
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366 | dimids=shape,natts=nbatt) |
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367 | if ((nbdim==1).and.(shape(1)==physical_points_dimid)) then |
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368 | |
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369 | ! skip "longitude" and "latitude" |
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370 | if (trim(varname)=="longitude") cycle |
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371 | if (trim(varname)=="latitude") cycle |
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372 | |
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373 | write(*,*) " processing: ",trim(varname) |
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374 | |
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375 | ! load input data: |
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376 | status=nf90_inq_varid(inid,varname,invarid) |
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377 | status=nf90_get_var(inid,invarid,surf_field) |
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378 | |
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379 | ! switch output file to to define mode |
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380 | status=nf90_redef(outid) |
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381 | if (status.ne.nf90_noerr) then |
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382 | write(*,*) "Failed to swich to define mode" |
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383 | write(*,*)trim(nf90_strerror(status)) |
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384 | stop |
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385 | endif |
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386 | !define the variable |
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387 | status=nf90_def_var(outid,trim(varname),NF90_REAL,& |
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388 | (/lon_dimid,lat_dimid/),varid) |
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389 | if (status.ne.nf90_noerr) then |
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390 | write(*,*) "Failed creating variable ",trim(varname) |
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391 | write(*,*)trim(nf90_strerror(status)) |
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392 | stop |
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393 | endif |
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394 | |
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395 | ! variable attributes |
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396 | do k=1,nbatt |
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397 | status=nf90_inq_attname(inid,invarid,k,varatt) |
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398 | if (status.ne.nf90_noerr) then |
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399 | write(*,*) "Failed getting attribute number",k," for ",trim(varname) |
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400 | write(*,*)trim(nf90_strerror(status)) |
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401 | stop |
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402 | endif |
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403 | status=nf90_get_att(inid,invarid,trim(varatt),varattcontent) |
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404 | if (status.ne.nf90_noerr) then |
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405 | write(*,*) "Failed loading attribute ",trim(varatt) |
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406 | write(*,*)trim(nf90_strerror(status)) |
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407 | stop |
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408 | endif |
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409 | |
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410 | ! write the attribute and its value to output |
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411 | status=nf90_put_att(outid,varid,trim(varatt),trim(varattcontent)) |
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412 | if (status.ne.nf90_noerr) then |
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413 | write(*,*) "Failed writing attribute ",trim(varatt) |
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414 | write(*,*)trim(nf90_strerror(status)) |
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415 | stop |
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416 | endif |
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417 | enddo ! do k=1,nbatt |
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418 | |
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419 | ! swich out of NetCDF define mode |
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420 | status=nf90_enddef(outid) |
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421 | if (status.ne.nf90_noerr) then |
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422 | write(*,*) "Failed to swich out of define mode" |
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423 | write(*,*)trim(nf90_strerror(status)) |
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424 | stop |
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425 | endif |
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426 | |
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427 | ! "convert" from surf_field(:) to out_surf_field(:,:) |
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428 | do i=1,lonlen |
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429 | out_surf_field(i,1)=surf_field(1) ! North Pole |
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430 | out_surf_field(i,latlen)=surf_field(1) ! South Pole |
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431 | enddo |
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432 | do j=2,latlen-1 |
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433 | ig0=1+(j-2)*(lonlen-1) |
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434 | do i=1,lonlen-1 |
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435 | out_surf_field(i,j)=surf_field(ig0+i) |
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436 | enddo |
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437 | out_surf_field(lonlen,j)=out_surf_field(1,j) ! redundant lon=180 |
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438 | enddo |
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439 | |
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440 | ! write the variable |
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441 | status=nf90_put_var(outid,varid,out_surf_field) |
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442 | if (status.ne.nf90_noerr) then |
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443 | write(*,*) "Failed to write ",trim(varname) |
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444 | write(*,*)trim(nf90_strerror(status)) |
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445 | stop |
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446 | endif |
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447 | endif ! of if ((nbdim==1).and.(shape(1)==physical_points_dimid)) |
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448 | enddo ! of do i=1,nbinvars |
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449 | |
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450 | ! 2.4. 3D (subsurface) variables |
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451 | allocate(out_subsurf_field(lonlen,latlen,subsurface_layers)) |
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452 | |
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453 | do ivar=1,nbinvars ! loop on all input variables |
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454 | ! find out what dimensions are linked to this variable |
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455 | status=nf90_inquire_variable(inid,ivar,name=varname,ndims=nbdim,& |
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456 | dimids=shape,natts=nbatt) |
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457 | if ((nbdim==2).and.(shape(1)==physical_points_dimid) & |
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458 | .and.(shape(2)==subsurface_layers_dimid)) then |
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459 | |
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460 | write(*,*) " processing: ",trim(varname) |
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461 | |
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462 | ! load input data: |
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463 | status=nf90_inq_varid(inid,varname,invarid) |
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464 | status=nf90_get_var(inid,invarid,subsurf_field) |
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465 | |
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466 | ! switch output file to to define mode |
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467 | status=nf90_redef(outid) |
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468 | if (status.ne.nf90_noerr) then |
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469 | write(*,*) "Failed to swich to define mode" |
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470 | write(*,*)trim(nf90_strerror(status)) |
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471 | stop |
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472 | endif |
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473 | !define the variable |
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474 | status=nf90_def_var(outid,trim(varname),NF90_REAL,& |
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475 | (/lon_dimid,lat_dimid,depth_dimid/),varid) |
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476 | if (status.ne.nf90_noerr) then |
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477 | write(*,*) "Failed creating variable ",trim(varname) |
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478 | write(*,*)trim(nf90_strerror(status)) |
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479 | stop |
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480 | endif |
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481 | |
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482 | ! variable attributes |
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483 | do k=1,nbatt |
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484 | status=nf90_inq_attname(inid,invarid,k,varatt) |
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485 | if (status.ne.nf90_noerr) then |
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486 | write(*,*) "Failed getting attribute number",k," for ",trim(varname) |
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487 | write(*,*)trim(nf90_strerror(status)) |
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488 | stop |
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489 | endif |
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490 | status=nf90_get_att(inid,invarid,trim(varatt),varattcontent) |
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491 | if (status.ne.nf90_noerr) then |
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492 | write(*,*) "Failed loading attribute ",trim(varatt) |
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493 | write(*,*)trim(nf90_strerror(status)) |
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494 | stop |
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495 | endif |
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496 | |
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497 | ! write the attribute and its value to output |
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498 | status=nf90_put_att(outid,varid,trim(varatt),trim(varattcontent)) |
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499 | if (status.ne.nf90_noerr) then |
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500 | write(*,*) "Failed writing attribute ",trim(varatt) |
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501 | write(*,*)trim(nf90_strerror(status)) |
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502 | stop |
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503 | endif |
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504 | enddo ! do k=1,nbatt |
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505 | |
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506 | ! swich out of NetCDF define mode |
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507 | status=nf90_enddef(outid) |
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508 | if (status.ne.nf90_noerr) then |
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509 | write(*,*) "Failed to swich out of define mode" |
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510 | write(*,*)trim(nf90_strerror(status)) |
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511 | stop |
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512 | endif |
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513 | |
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514 | ! "convert" from subsurf_field(:,:) to out_subsurf_field(:,:,:) |
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515 | do i=1,lonlen |
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516 | out_subsurf_field(i,1,:)=subsurf_field(1,:) ! North Pole |
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517 | out_subsurf_field(i,latlen,:)=subsurf_field(1,:) ! South Pole |
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518 | enddo |
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519 | do j=2,latlen-1 |
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520 | ig0=1+(j-2)*(lonlen-1) |
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521 | do i=1,lonlen-1 |
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522 | out_subsurf_field(i,j,:)=subsurf_field(ig0+i,:) |
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523 | enddo |
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524 | out_subsurf_field(lonlen,j,:)=out_subsurf_field(1,j,:) ! redundant lon=180 |
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525 | enddo |
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526 | |
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527 | ! write the variable |
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528 | status=nf90_put_var(outid,varid,out_subsurf_field) |
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529 | if (status.ne.nf90_noerr) then |
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530 | write(*,*) "Failed to write ",trim(varname) |
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531 | write(*,*)trim(nf90_strerror(status)) |
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532 | stop |
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533 | endif |
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534 | endif ! of if ((nbdim==1).and.(shape(1)==physical_points_dimid)...) |
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535 | enddo ! of do i=1,nbinvars |
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536 | |
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537 | |
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538 | ! 3. Finish things and cleanup |
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539 | ! Close output file |
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540 | status=nf90_close(outid) |
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541 | if (status.ne.nf90_noerr) then |
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542 | write(*,*)"Failed to close file: ",trim(outfile) |
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543 | write(*,*)trim(nf90_strerror(status)) |
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544 | stop |
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545 | endif |
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546 | |
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547 | end program expandstartfi |
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