1 | !********************************************************************** |
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2 | ! Copyright 1998,1999,2000,2001,2002,2005,2007,2008,2009,2010 * |
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3 | ! Andreas Stohl, Petra Seibert, A. Frank, Gerhard Wotawa, * |
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4 | ! Caroline Forster, Sabine Eckhardt, John Burkhart, Harald Sodemann * |
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5 | ! * |
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6 | ! This file is part of FLEXPART. * |
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7 | ! * |
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8 | ! FLEXPART is free software: you can redistribute it and/or modify * |
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9 | ! it under the terms of the GNU General Public License as published by* |
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10 | ! the Free Software Foundation, either version 3 of the License, or * |
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11 | ! (at your option) any later version. * |
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12 | ! * |
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13 | ! FLEXPART is distributed in the hope that it will be useful, * |
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14 | ! but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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15 | ! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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16 | ! GNU General Public License for more details. * |
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17 | ! * |
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18 | ! You should have received a copy of the GNU General Public License * |
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19 | ! along with FLEXPART. If not, see <http://www.gnu.org/licenses/>. * |
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20 | !********************************************************************** |
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21 | |
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22 | subroutine readwind(indj,n,uuh,vvh,wwh) |
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23 | |
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24 | !********************************************************************** |
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25 | ! * |
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26 | ! TRAJECTORY MODEL SUBROUTINE READWIND * |
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27 | ! * |
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28 | !********************************************************************** |
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29 | ! * |
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30 | ! AUTHOR: G. WOTAWA * |
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31 | ! DATE: 1997-08-05 * |
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32 | ! LAST UPDATE: 2000-10-17, Andreas Stohl * |
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33 | ! * |
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34 | !********************************************************************** |
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35 | ! Changes, Bernd C. Krueger, Feb. 2001: |
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36 | ! Variables tth and qvh (on eta coordinates) in common block |
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37 | !********************************************************************** |
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38 | ! * |
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39 | ! DESCRIPTION: * |
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40 | ! * |
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41 | ! READING OF ECMWF METEOROLOGICAL FIELDS FROM INPUT DATA FILES. THE * |
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42 | ! INPUT DATA FILES ARE EXPECTED TO BE AVAILABLE IN GRIB CODE * |
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43 | ! * |
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44 | ! INPUT: * |
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45 | ! indj indicates number of the wind field to be read in * |
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46 | ! n temporal index for meteorological fields (1 to 3)* |
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47 | ! * |
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48 | ! IMPORTANT VARIABLES FROM COMMON BLOCK: * |
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49 | ! * |
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50 | ! wfname File name of data to be read in * |
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51 | ! nx,ny,nuvz,nwz expected field dimensions * |
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52 | ! nlev_ec number of vertical levels ecmwf model * |
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53 | ! uu,vv,ww wind fields * |
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54 | ! tt,qv temperature and specific humidity * |
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55 | ! ps surface pressure * |
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56 | ! * |
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57 | !********************************************************************** |
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58 | |
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59 | use par_mod |
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60 | use com_mod |
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61 | |
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62 | implicit none |
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63 | |
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64 | real :: uuh(0:nxmax-1,0:nymax-1,nuvzmax) |
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65 | real :: vvh(0:nxmax-1,0:nymax-1,nuvzmax) |
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66 | real :: wwh(0:nxmax-1,0:nymax-1,nwzmax) |
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67 | integer :: indj,i,j,k,n,levdiff2,ifield,iumax,iwmax,lunit |
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68 | |
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69 | ! VARIABLES AND ARRAYS NEEDED FOR GRIB DECODING |
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70 | |
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71 | ! dimension of isec2 at least (22+n), where n is the number of parallels or |
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72 | ! meridians in a quasi-regular (reduced) Gaussian or lat/long grid |
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73 | |
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74 | ! dimension of zsec2 at least (10+nn), where nn is the number of vertical |
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75 | ! coordinate parameters |
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76 | |
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77 | integer :: isec0(2),isec1(56),isec2(22+nxmax+nymax),isec3(2) |
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78 | integer :: isec4(64),inbuff(jpack),ilen,ierr,iword |
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79 | !integer iswap |
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80 | real :: zsec2(60+2*nuvzmax),zsec3(2),zsec4(jpunp) |
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81 | real :: xaux,yaux,xaux0,yaux0 |
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82 | real,parameter :: eps=1.e-4 |
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83 | real :: ewss(0:nxmax-1,0:nymax-1),nsss(0:nxmax-1,0:nymax-1) |
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84 | real :: plev1,pmean,tv,fu,hlev1,ff10m,fflev1 |
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85 | |
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86 | character(len=1) :: yoper = 'D' |
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87 | logical :: hflswitch,strswitch |
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88 | |
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89 | hflswitch=.false. |
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90 | strswitch=.false. |
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91 | levdiff2=nlev_ec-nwz+1 |
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92 | iumax=0 |
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93 | iwmax=0 |
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94 | |
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95 | ! |
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96 | ! OPENING OF DATA FILE (GRIB CODE) |
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97 | ! |
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98 | 5 call pbopen(lunit,path(3)(1:length(3))//wfname(indj),'r',ierr) |
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99 | if(ierr.lt.0) goto 999 |
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100 | |
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101 | ifield=0 |
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102 | 10 ifield=ifield+1 |
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103 | ! |
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104 | ! GET NEXT FIELDS |
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105 | ! |
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106 | call pbgrib(lunit,inbuff,jpack,ilen,ierr) |
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107 | if(ierr.eq.-1) goto 50 ! EOF DETECTED |
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108 | if(ierr.lt.-1) goto 888 ! ERROR DETECTED |
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109 | |
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110 | ierr=1 |
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111 | |
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112 | ! Check whether we are on a little endian or on a big endian computer |
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113 | !******************************************************************** |
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114 | |
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115 | !if (inbuff(1).eq.1112101447) then ! little endian, swap bytes |
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116 | ! iswap=1+ilen/4 |
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117 | ! call swap32(inbuff,iswap) |
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118 | !else if (inbuff(1).ne.1196575042) then ! big endian |
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119 | ! stop 'subroutine gridcheck: corrupt GRIB data' |
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120 | !endif |
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121 | |
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122 | |
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123 | call gribex(isec0,isec1,isec2,zsec2,isec3,zsec3,isec4, & |
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124 | zsec4,jpunp,inbuff,jpack,iword,yoper,ierr) |
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125 | if (ierr.ne.0) goto 888 ! ERROR DETECTED |
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126 | |
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127 | if(ifield.eq.1) then |
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128 | |
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129 | ! CHECK GRID SPECIFICATIONS |
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130 | |
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131 | if(isec2(2).ne.nxfield) stop 'READWIND: NX NOT CONSISTENT' |
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132 | if(isec2(3).ne.ny) stop 'READWIND: NY NOT CONSISTENT' |
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133 | if(isec2(12)/2-1.ne.nlev_ec) & |
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134 | stop 'READWIND: VERTICAL DISCRETIZATION NOT CONSISTENT' |
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135 | xaux=real(isec2(5))/1000.+real(nxshift)*dx |
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136 | yaux=real(isec2(7))/1000. |
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137 | xaux0=xlon0 |
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138 | yaux0=ylat0 |
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139 | if(xaux.lt.0.) xaux=xaux+360. |
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140 | if(yaux.lt.0.) yaux=yaux+360. |
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141 | if(xaux0.lt.0.) xaux0=xaux0+360. |
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142 | if(yaux0.lt.0.) yaux0=yaux0+360. |
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143 | if(abs(xaux-xaux0).gt.eps) & |
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144 | stop 'READWIND: LOWER LEFT LONGITUDE NOT CONSISTENT' |
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145 | if(abs(yaux-yaux0).gt.eps) & |
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146 | stop 'READWIND: LOWER LEFT LATITUDE NOT CONSISTENT' |
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147 | endif |
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148 | |
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149 | do j=0,nymin1 |
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150 | do i=0,nxfield-1 |
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151 | k=isec1(8) |
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152 | if(isec1(6).eq.130) tth(i,j,nlev_ec-k+2,n)= &!! TEMPERATURE |
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153 | zsec4(nxfield*(ny-j-1)+i+1) |
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154 | if(isec1(6).eq.131) uuh(i,j,nlev_ec-k+2)= &!! U VELOCITY |
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155 | zsec4(nxfield*(ny-j-1)+i+1) |
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156 | if(isec1(6).eq.132) vvh(i,j,nlev_ec-k+2)= &!! V VELOCITY |
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157 | zsec4(nxfield*(ny-j-1)+i+1) |
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158 | if(isec1(6).eq.133) then !! SPEC. HUMIDITY |
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159 | qvh(i,j,nlev_ec-k+2,n)=zsec4(nxfield*(ny-j-1)+i+1) |
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160 | if (qvh(i,j,nlev_ec-k+2,n) .lt. 0.) & |
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161 | qvh(i,j,nlev_ec-k+2,n) = 0. |
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162 | ! this is necessary because the gridded data may contain |
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163 | ! spurious negative values |
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164 | endif |
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165 | if(isec1(6).eq.134) ps(i,j,1,n)= &!! SURF. PRESS. |
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166 | zsec4(nxfield*(ny-j-1)+i+1) |
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167 | |
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168 | if(isec1(6).eq.135) wwh(i,j,nlev_ec-k+1)= &!! W VELOCITY |
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169 | zsec4(nxfield*(ny-j-1)+i+1) |
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170 | if(isec1(6).eq.141) sd(i,j,1,n)= &!! SNOW DEPTH |
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171 | zsec4(nxfield*(ny-j-1)+i+1) |
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172 | if(isec1(6).eq.151) msl(i,j,1,n)= &!! SEA LEVEL PRESS. |
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173 | zsec4(nxfield*(ny-j-1)+i+1) |
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174 | if(isec1(6).eq.164) tcc(i,j,1,n)= &!! CLOUD COVER |
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175 | zsec4(nxfield*(ny-j-1)+i+1) |
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176 | if(isec1(6).eq.165) u10(i,j,1,n)= &!! 10 M U VELOCITY |
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177 | zsec4(nxfield*(ny-j-1)+i+1) |
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178 | if(isec1(6).eq.166) v10(i,j,1,n)= &!! 10 M V VELOCITY |
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179 | zsec4(nxfield*(ny-j-1)+i+1) |
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180 | if(isec1(6).eq.167) tt2(i,j,1,n)= &!! 2 M TEMPERATURE |
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181 | zsec4(nxfield*(ny-j-1)+i+1) |
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182 | if(isec1(6).eq.168) td2(i,j,1,n)= &!! 2 M DEW POINT |
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183 | zsec4(nxfield*(ny-j-1)+i+1) |
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184 | if(isec1(6).eq.142) then !! LARGE SCALE PREC. |
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185 | lsprec(i,j,1,n)=zsec4(nxfield*(ny-j-1)+i+1) |
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186 | if (lsprec(i,j,1,n).lt.0.) lsprec(i,j,1,n)=0. |
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187 | endif |
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188 | if(isec1(6).eq.143) then !! CONVECTIVE PREC. |
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189 | convprec(i,j,1,n)=zsec4(nxfield*(ny-j-1)+i+1) |
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190 | if (convprec(i,j,1,n).lt.0.) convprec(i,j,1,n)=0. |
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191 | endif |
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192 | if(isec1(6).eq.146) sshf(i,j,1,n)= &!! SENS. HEAT FLUX |
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193 | zsec4(nxfield*(ny-j-1)+i+1) |
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194 | if((isec1(6).eq.146).and.(zsec4(nxfield*(ny-j-1)+i+1).ne.0.)) & |
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195 | hflswitch=.true. ! Heat flux available |
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196 | if(isec1(6).eq.176) then !! SOLAR RADIATION |
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197 | ssr(i,j,1,n)=zsec4(nxfield*(ny-j-1)+i+1) |
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198 | if (ssr(i,j,1,n).lt.0.) ssr(i,j,1,n)=0. |
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199 | endif |
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200 | if(isec1(6).eq.180) ewss(i,j)= &!! EW SURFACE STRESS |
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201 | zsec4(nxfield*(ny-j-1)+i+1) |
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202 | if(isec1(6).eq.181) nsss(i,j)= &!! NS SURFACE STRESS |
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203 | zsec4(nxfield*(ny-j-1)+i+1) |
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204 | if(((isec1(6).eq.180).or.(isec1(6).eq.181)).and. & |
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205 | (zsec4(nxfield*(ny-j-1)+i+1).ne.0.)) strswitch=.true. ! stress available |
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206 | if(isec1(6).eq.129) oro(i,j)= &!! ECMWF OROGRAPHY |
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207 | zsec4(nxfield*(ny-j-1)+i+1)/ga |
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208 | if(isec1(6).eq.160) excessoro(i,j)= &!! STANDARD DEVIATION OF OROGRAPHY |
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209 | zsec4(nxfield*(ny-j-1)+i+1) |
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210 | if(isec1(6).eq.172) lsm(i,j)= &!! ECMWF LAND SEA MASK |
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211 | zsec4(nxfield*(ny-j-1)+i+1) |
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212 | if(isec1(6).eq.131) iumax=max(iumax,nlev_ec-k+1) |
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213 | if(isec1(6).eq.135) iwmax=max(iwmax,nlev_ec-k+1) |
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214 | end do |
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215 | end do |
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216 | |
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217 | goto 10 !! READ NEXT LEVEL OR PARAMETER |
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218 | ! |
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219 | ! CLOSING OF INPUT DATA FILE |
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220 | ! |
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221 | 50 call pbclose(lunit,ierr) !! FINNISHED READING / CLOSING GRIB FILE |
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222 | |
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223 | if(levdiff2.eq.0) then |
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224 | iwmax=nlev_ec+1 |
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225 | do i=0,nxmin1 |
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226 | do j=0,nymin1 |
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227 | wwh(i,j,nlev_ec+1)=0. |
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228 | end do |
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229 | end do |
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230 | endif |
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231 | |
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232 | |
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233 | ! For global fields, assign the leftmost data column also to the rightmost |
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234 | ! data column; if required, shift whole grid by nxshift grid points |
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235 | !************************************************************************* |
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236 | |
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237 | if (xglobal) then |
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238 | call shift_field_0(ewss,nxfield,ny) |
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239 | call shift_field_0(nsss,nxfield,ny) |
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240 | call shift_field_0(oro,nxfield,ny) |
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241 | call shift_field_0(excessoro,nxfield,ny) |
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242 | call shift_field_0(lsm,nxfield,ny) |
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243 | call shift_field(ps,nxfield,ny,1,1,2,n) |
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244 | call shift_field(sd,nxfield,ny,1,1,2,n) |
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245 | call shift_field(msl,nxfield,ny,1,1,2,n) |
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246 | call shift_field(tcc,nxfield,ny,1,1,2,n) |
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247 | call shift_field(u10,nxfield,ny,1,1,2,n) |
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248 | call shift_field(v10,nxfield,ny,1,1,2,n) |
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249 | call shift_field(tt2,nxfield,ny,1,1,2,n) |
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250 | call shift_field(td2,nxfield,ny,1,1,2,n) |
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251 | call shift_field(lsprec,nxfield,ny,1,1,2,n) |
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252 | call shift_field(convprec,nxfield,ny,1,1,2,n) |
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253 | call shift_field(sshf,nxfield,ny,1,1,2,n) |
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254 | call shift_field(ssr,nxfield,ny,1,1,2,n) |
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255 | call shift_field(tth,nxfield,ny,nuvzmax,nuvz,2,n) |
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256 | call shift_field(qvh,nxfield,ny,nuvzmax,nuvz,2,n) |
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257 | call shift_field(uuh,nxfield,ny,nuvzmax,nuvz,1,1) |
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258 | call shift_field(vvh,nxfield,ny,nuvzmax,nuvz,1,1) |
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259 | call shift_field(wwh,nxfield,ny,nwzmax,nwz,1,1) |
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260 | endif |
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261 | |
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262 | do i=0,nxmin1 |
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263 | do j=0,nymin1 |
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264 | surfstr(i,j,1,n)=sqrt(ewss(i,j)**2+nsss(i,j)**2) |
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265 | end do |
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266 | end do |
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267 | |
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268 | if ((.not.hflswitch).or.(.not.strswitch)) then |
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269 | write(*,*) 'WARNING: No flux data contained in GRIB file ', & |
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270 | wfname(indj) |
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271 | |
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272 | ! CALCULATE USTAR AND SSHF USING THE PROFILE METHOD |
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273 | ! As ECMWF has increased the model resolution, such that now the first model |
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274 | ! level is at about 10 m (where 10-m wind is given), use the 2nd ECMWF level |
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275 | ! (3rd model level in FLEXPART) for the profile method |
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276 | !*************************************************************************** |
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277 | |
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278 | do i=0,nxmin1 |
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279 | do j=0,nymin1 |
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280 | plev1=akz(3)+bkz(3)*ps(i,j,1,n) |
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281 | pmean=0.5*(ps(i,j,1,n)+plev1) |
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282 | tv=tth(i,j,3,n)*(1.+0.61*qvh(i,j,3,n)) |
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283 | fu=-r_air*tv/ga/pmean |
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284 | hlev1=fu*(plev1-ps(i,j,1,n)) ! HEIGTH OF FIRST MODEL LAYER |
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285 | ff10m= sqrt(u10(i,j,1,n)**2+v10(i,j,1,n)**2) |
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286 | fflev1=sqrt(uuh(i,j,3)**2+vvh(i,j,3)**2) |
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287 | call pbl_profile(ps(i,j,1,n),td2(i,j,1,n),hlev1, & |
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288 | tt2(i,j,1,n),tth(i,j,3,n),ff10m,fflev1, & |
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289 | surfstr(i,j,1,n),sshf(i,j,1,n)) |
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290 | if(sshf(i,j,1,n).gt.200.) sshf(i,j,1,n)=200. |
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291 | if(sshf(i,j,1,n).lt.-400.) sshf(i,j,1,n)=-400. |
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292 | end do |
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293 | end do |
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294 | endif |
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295 | |
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296 | |
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297 | ! Assign 10 m wind to model level at eta=1.0 to have one additional model |
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298 | ! level at the ground |
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299 | ! Specific humidity is taken the same as at one level above |
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300 | ! Temperature is taken as 2 m temperature |
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301 | !************************************************************************** |
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302 | |
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303 | do i=0,nxmin1 |
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304 | do j=0,nymin1 |
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305 | uuh(i,j,1)=u10(i,j,1,n) |
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306 | vvh(i,j,1)=v10(i,j,1,n) |
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307 | qvh(i,j,1,n)=qvh(i,j,2,n) |
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308 | tth(i,j,1,n)=tt2(i,j,1,n) |
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309 | end do |
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310 | end do |
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311 | |
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312 | if(iumax.ne.nuvz-1) stop 'READWIND: NUVZ NOT CONSISTENT' |
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313 | if(iwmax.ne.nwz) stop 'READWIND: NWZ NOT CONSISTENT' |
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314 | |
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315 | return |
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316 | 888 write(*,*) ' #### FLEXPART MODEL ERROR! WINDFIELD #### ' |
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317 | write(*,*) ' #### ',wfname(indj),' #### ' |
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318 | write(*,*) ' #### IS NOT GRIB FORMAT !!! #### ' |
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319 | stop 'Execution terminated' |
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320 | 999 write(*,*) ' #### FLEXPART MODEL ERROR! WINDFIELD #### ' |
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321 | write(*,*) ' #### ',wfname(indj),' #### ' |
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322 | write(*,*) ' #### CANNOT BE OPENED !!! #### ' |
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323 | stop 'Execution terminated' |
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324 | |
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325 | end subroutine readwind |
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