1 | ! SPDX-FileCopyrightText: FLEXPART 1998-2019, see flexpart_license.txt |
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2 | ! SPDX-License-Identifier: GPL-3.0-or-later |
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3 | |
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4 | subroutine getfields(itime,nstop,memstat,metdata_format) |
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5 | ! i o o |
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6 | !***************************************************************************** |
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7 | ! * |
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8 | ! This subroutine manages the 3 data fields to be kept in memory. * |
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9 | ! During the first time step of petterssen it has to be fulfilled that the * |
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10 | ! first data field must have |wftime|<itime, i.e. the absolute value of * |
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11 | ! wftime must be smaller than the absolute value of the current time in [s].* |
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12 | ! The other 2 fields are the next in time after the first one. * |
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13 | ! Pointers (memind) are used, because otherwise one would have to resort the* |
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14 | ! wind fields, which costs a lot of computing time. Here only the pointers * |
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15 | ! are resorted. * |
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16 | ! * |
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17 | ! Author: A. Stohl * |
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18 | ! * |
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19 | ! 29 April 1994 * |
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20 | ! * |
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21 | !***************************************************************************** |
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22 | ! Changes, Bernd C. Krueger, Feb. 2001: |
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23 | ! Variables tth,qvh,tthn,qvhn (on eta coordinates) in common block. |
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24 | ! Function of nstop extended. |
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25 | ! |
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26 | ! eso 2014: |
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27 | ! MPI version. |
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28 | ! If running with number of processes >= mpi_mod::read_grp_min, |
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29 | ! only one process (mpi_mod::lmpreader=.true.) does the actual reading, while |
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30 | ! the rest call this routine only to update memind, memstat etc. |
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31 | ! |
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32 | ! If mpi_mod::lmp_sync=.true., uses 3 fields instead of 2, to allow reading |
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33 | ! the newest in the background. |
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34 | ! |
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35 | ! Return memstat, which is the sum of |
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36 | ! |
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37 | ! memstat=16: one new field to be read |
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38 | ! memstat=32: two new fields must be read |
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39 | ! memstat=1,2,3: position(s) in array to read next field |
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40 | ! memstat=0: no new fields to be read |
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41 | ! |
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42 | ! Unified ECMWF and GFS builds |
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43 | ! Marian Harustak, 12.5.2017 |
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44 | ! - Added passing of metdata_format as it was needed by called routines |
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45 | ! |
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46 | !***************************************************************************** |
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47 | ! * |
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48 | ! Variables: * |
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49 | ! lwindinterval [s] time difference between the two wind fields read in * |
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50 | ! indj indicates the number of the wind field to be read in * |
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51 | ! indmin remembers the number of wind fields already treated * |
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52 | ! memind(2[3]) pointer, on which place the wind fields are stored * |
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53 | ! memtime(2[3]) [s] times of the wind fields, which are kept in memory * |
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54 | ! itime [s] current time since start date of trajectory calcu- * |
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55 | ! lation * |
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56 | ! nstop > 0, if trajectory has to be terminated * |
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57 | ! memstat keep track of change of status for field pointers * |
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58 | ! nx,ny,nuvz,nwz field dimensions in x,y and z direction * |
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59 | ! uu(0:nxmax,0:nymax,nuvzmax,numwfmem) wind components in x-direction [m/s]* |
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60 | ! vv(0:nxmax,0:nymax,nuvzmax,numwfmem) wind components in y-direction [m/s]* |
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61 | ! ww(0:nxmax,0:nymax,nwzmax,numwfmem) wind components in z-direction * |
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62 | ! [deltaeta/s] * |
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63 | ! tt(0:nxmax,0:nymax,nuvzmax,numwfmem) temperature [K] * |
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64 | ! ps(0:nxmax,0:nymax,numwfmem) surface pressure [Pa] * |
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65 | ! metdata_format format of metdata (ecmwf/gfs) * |
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66 | ! * |
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67 | ! Constants: * |
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68 | ! idiffmax maximum allowable time difference between 2 wind * |
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69 | ! fields * |
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70 | ! * |
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71 | !***************************************************************************** |
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72 | |
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73 | use par_mod |
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74 | use com_mod |
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75 | use mpi_mod, only: lmpreader,lmp_use_reader,lmp_sync |
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76 | use class_gribfile |
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77 | |
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78 | implicit none |
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79 | |
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80 | integer :: metdata_format |
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81 | integer :: indj,itime,nstop,memaux,mindread |
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82 | ! mindread: index of where to read 3rd field |
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83 | integer, intent(out) :: memstat |
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84 | ! keep track of 3rd field index. updated when new fields are read |
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85 | integer, save :: mind3=0 |
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86 | |
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87 | real :: uuh(0:nxmax-1,0:nymax-1,nuvzmax) |
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88 | real :: vvh(0:nxmax-1,0:nymax-1,nuvzmax) |
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89 | real :: pvh(0:nxmax-1,0:nymax-1,nuvzmax) |
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90 | real :: wwh(0:nxmax-1,0:nymax-1,nwzmax) |
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91 | real :: uuhn(0:nxmaxn-1,0:nymaxn-1,nuvzmax,maxnests) |
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92 | real :: vvhn(0:nxmaxn-1,0:nymaxn-1,nuvzmax,maxnests) |
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93 | real :: pvhn(0:nxmaxn-1,0:nymaxn-1,nuvzmax,maxnests) |
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94 | real :: wwhn(0:nxmaxn-1,0:nymaxn-1,nwzmax,maxnests) |
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95 | |
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96 | integer :: indmin = 1 |
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97 | |
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98 | |
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99 | ! Check, if wind fields are available for the current time step |
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100 | !************************************************************** |
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101 | |
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102 | nstop=0 |
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103 | memstat=0 |
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104 | |
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105 | if ((ldirect*wftime(1).gt.ldirect*itime).or. & |
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106 | (ldirect*wftime(numbwf).lt.ldirect*itime)) then |
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107 | write(*,*) 'FLEXPART WARNING: NO WIND FIELDS ARE AVAILABLE.' |
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108 | write(*,*) 'A TRAJECTORY HAS TO BE TERMINATED.' |
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109 | nstop=4 |
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110 | return |
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111 | endif |
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112 | |
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113 | |
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114 | if ((ldirect*memtime(1).le.ldirect*itime).and. & |
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115 | (ldirect*memtime(2).gt.ldirect*itime)) then |
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116 | |
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117 | ! The right wind fields are already in memory -> don't do anything |
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118 | !***************************************************************** |
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119 | memstat=0 |
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120 | continue |
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121 | |
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122 | else if ((ldirect*memtime(2).le.ldirect*itime).and. & |
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123 | (memtime(2).ne.999999999)) then |
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124 | |
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125 | |
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126 | ! Current time is after 2nd wind field |
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127 | ! -> Resort wind field pointers, so that current time is between 1st and 2nd |
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128 | !*************************************************************************** |
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129 | |
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130 | ! 2 fields in memory |
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131 | !******************* |
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132 | if (lmp_sync) then |
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133 | memaux=memind(1) |
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134 | memind(1)=memind(2) |
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135 | memind(2)=memaux |
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136 | memtime(1)=memtime(2) |
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137 | memstat=16+memind(2) |
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138 | mindread=memind(2) |
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139 | |
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140 | else |
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141 | ! 3 fields in memory |
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142 | ! Note that the reader process never needs to keep 3 fields in memory, |
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143 | ! (2 is enough) so it is possible to save some memory |
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144 | !********************************************************************* |
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145 | if (mind3.eq.32.or.mind3.eq.19) then |
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146 | if (lmpreader) then |
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147 | memind(1)=2 |
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148 | memind(2)=3 |
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149 | memind(3)=3 |
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150 | else |
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151 | memind(1)=2 |
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152 | memind(2)=3 |
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153 | memind(3)=1 |
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154 | end if |
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155 | memstat=17 |
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156 | else if (mind3.eq.17) then |
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157 | if (lmpreader) then |
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158 | memind(1)=3 |
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159 | memind(2)=1 |
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160 | memind(3)=1 |
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161 | else |
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162 | memind(1)=3 |
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163 | memind(2)=1 |
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164 | memind(3)=2 |
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165 | end if |
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166 | memstat=18 |
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167 | else if (mind3.eq.18) then |
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168 | if (lmpreader) then |
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169 | memind(1)=1 |
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170 | memind(2)=2 |
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171 | memind(3)=2 |
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172 | else |
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173 | memind(1)=1 |
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174 | memind(2)=2 |
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175 | memind(3)=3 |
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176 | end if |
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177 | memstat=19 |
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178 | else |
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179 | write(*,*) '#### getfields_mpi.f90> ERROR: ', & |
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180 | & 'unknown mind3, exiting.', mind3,' ####' |
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181 | stop |
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182 | end if |
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183 | mind3=memstat |
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184 | memtime(1)=memtime(2) |
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185 | mindread=memind(3) |
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186 | end if |
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187 | |
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188 | |
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189 | ! Read a new wind field and store it on place memind(2) |
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190 | ! or memind(3) for the 3-field read-ahead version |
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191 | !****************************************************** |
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192 | do indj=indmin,numbwf-1 |
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193 | if (ldirect*wftime(indj+1).gt.ldirect*itime) then |
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194 | if (lmpreader.or..not. lmp_use_reader) then |
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195 | if (metdata_format.eq.GRIBFILE_CENTRE_ECMWF) then |
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196 | call readwind_ecmwf(indj+1,mindread,uuh,vvh,wwh) |
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197 | else |
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198 | call readwind_gfs(indj+1,mindread,uuh,vvh,wwh) |
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199 | end if |
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200 | call readwind_nests(indj+1,mindread,uuhn,vvhn,wwhn) |
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201 | call calcpar(mindread,uuh,vvh,pvh,metdata_format) |
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202 | call calcpar_nests(mindread,uuhn,vvhn,pvhn,metdata_format) |
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203 | if (metdata_format.eq.GRIBFILE_CENTRE_ECMWF) then |
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204 | call verttransform_ecmwf(mindread,uuh,vvh,wwh,pvh) |
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205 | else |
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206 | call verttransform_gfs(mindread,uuh,vvh,wwh,pvh) |
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207 | end if |
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208 | call verttransform_nests(mindread,uuhn,vvhn,wwhn,pvhn) |
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209 | end if |
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210 | memtime(2)=wftime(indj+1) |
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211 | nstop = 1 |
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212 | goto 40 |
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213 | endif |
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214 | end do |
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215 | 40 indmin=indj |
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216 | |
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217 | if (WETBKDEP.and.(lmpreader.or.(.not.lmp_use_reader.and.lroot))) then |
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218 | call writeprecip(itime,memind(1)) |
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219 | endif |
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220 | |
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221 | else |
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222 | |
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223 | ! No wind fields, which can be used, are currently in memory |
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224 | ! -> read both wind fields |
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225 | !*********************************************************** |
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226 | memstat=32 |
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227 | |
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228 | do indj=indmin,numbwf-1 |
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229 | if ((ldirect*wftime(indj).le.ldirect*itime).and. & |
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230 | (ldirect*wftime(indj+1).gt.ldirect*itime)) then |
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231 | memind(1)=1 |
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232 | if (lmpreader.or..not.lmp_use_reader) then |
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233 | if (metdata_format.eq.GRIBFILE_CENTRE_ECMWF) then |
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234 | call readwind_ecmwf(indj,memind(1),uuh,vvh,wwh) |
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235 | else |
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236 | call readwind_gfs(indj,memind(1),uuh,vvh,wwh) |
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237 | end if |
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238 | call readwind_nests(indj,memind(1),uuhn,vvhn,wwhn) |
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239 | call calcpar(memind(1),uuh,vvh,pvh,metdata_format) |
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240 | call calcpar_nests(memind(1),uuhn,vvhn,pvhn,metdata_format) |
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241 | if (metdata_format.eq.GRIBFILE_CENTRE_ECMWF) then |
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242 | call verttransform_ecmwf(memind(1),uuh,vvh,wwh,pvh) |
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243 | else |
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244 | call verttransform_gfs(memind(1),uuh,vvh,wwh,pvh) |
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245 | end if |
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246 | call verttransform_nests(memind(1),uuhn,vvhn,wwhn,pvhn) |
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247 | end if |
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248 | memtime(1)=wftime(indj) |
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249 | memind(2)=2 |
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250 | if (lmpreader.or..not.lmp_use_reader) then |
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251 | if (metdata_format.eq.GRIBFILE_CENTRE_ECMWF) then |
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252 | call readwind_ecmwf(indj+1,memind(2),uuh,vvh,wwh) |
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253 | else |
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254 | call readwind_gfs(indj+1,memind(2),uuh,vvh,wwh) |
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255 | end if |
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256 | call readwind_nests(indj+1,memind(2),uuhn,vvhn,wwhn) |
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257 | call calcpar(memind(2),uuh,vvh,pvh,metdata_format) |
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258 | call calcpar_nests(memind(2),uuhn,vvhn,pvhn,metdata_format) |
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259 | if (metdata_format.eq.GRIBFILE_CENTRE_ECMWF) then |
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260 | call verttransform_ecmwf(memind(2),uuh,vvh,wwh,pvh) |
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261 | else |
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262 | call verttransform_gfs(memind(2),uuh,vvh,wwh,pvh) |
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263 | end if |
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264 | call verttransform_nests(memind(2),uuhn,vvhn,wwhn,pvhn) |
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265 | end if |
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266 | memtime(2)=wftime(indj+1) |
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267 | ! DEV: not used |
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268 | if (.not.lmp_sync) memind(3)=3 ! indicate position of next read |
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269 | nstop = 1 |
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270 | goto 60 |
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271 | endif |
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272 | end do |
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273 | 60 indmin=indj |
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274 | |
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275 | ! if (WETBKDEP.and.lroot) then |
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276 | if (WETBKDEP.and.(lmpreader.or.(.not.lmp_use_reader.and.lroot))) then |
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277 | call writeprecip(itime,memind(1)) |
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278 | endif |
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279 | |
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280 | endif |
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281 | |
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282 | lwindinterv=abs(memtime(2)-memtime(1)) |
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283 | |
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284 | if (lwindinterv.gt.idiffmax) nstop=3 |
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285 | |
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286 | end subroutine getfields |
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