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 gridcheck_nests |
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23 | |
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24 | !***************************************************************************** |
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25 | ! * |
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26 | ! This routine checks the grid specification for the nested model * |
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27 | ! domains. It is similar to subroutine gridcheck, which checks the * |
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28 | ! mother domain. * |
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29 | ! * |
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30 | ! Authors: A. Stohl, G. Wotawa * |
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31 | ! * |
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32 | ! 8 February 1999 * |
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33 | ! * |
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34 | !***************************************************************************** |
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35 | |
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36 | use par_mod |
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37 | use com_mod |
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38 | |
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39 | implicit none |
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40 | |
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41 | integer :: i,j,k,l,ifn,ifield,iumax,iwmax,numskip,nlev_ecn |
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42 | integer :: nuvzn,nwzn |
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43 | real :: akmn(nwzmax),bkmn(nwzmax),akzn(nuvzmax),bkzn(nuvzmax) |
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44 | real :: xaux1,xaux2,yaux1,yaux2 |
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45 | |
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46 | ! VARIABLES AND ARRAYS NEEDED FOR GRIB DECODING |
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47 | |
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48 | ! dimension of isec2 at least (22+n), where n is the number of parallels or |
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49 | ! meridians in a quasi-regular (reduced) Gaussian or lat/long grid |
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50 | |
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51 | ! dimension of zsec2 at least (10+nn), where nn is the number of vertical |
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52 | ! coordinate parameters |
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53 | |
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54 | integer :: isec0(2),isec1(56),isec2(22+nxmaxn+nymaxn),isec3(2) |
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55 | integer :: isec4(64),inbuff(jpack),ilen,ierr,iword,lunit |
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56 | !integer iswap |
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57 | real :: zsec2(60+2*nuvzmax),zsec3(2),zsec4(jpunp) |
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58 | character(len=1) :: yoper = 'D' |
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59 | |
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60 | xresoln(0)=1. ! resolution enhancement for mother grid |
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61 | yresoln(0)=1. ! resolution enhancement for mother grid |
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62 | |
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63 | ! Loop about all nesting levels |
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64 | !****************************** |
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65 | |
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66 | do l=1,numbnests |
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67 | |
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68 | iumax=0 |
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69 | iwmax=0 |
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70 | |
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71 | if(ideltas.gt.0) then |
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72 | ifn=1 |
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73 | else |
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74 | ifn=numbwf |
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75 | endif |
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76 | ! |
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77 | ! OPENING OF DATA FILE (GRIB CODE) |
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78 | ! |
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79 | 5 call pbopen(lunit,path(numpath+2*(l-1)+1) & |
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80 | (1:length(numpath+2*(l-1)+1))//wfnamen(l,ifn),'r',ierr) |
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81 | if(ierr.lt.0) goto 999 |
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82 | |
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83 | ifield=0 |
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84 | 10 ifield=ifield+1 |
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85 | ! |
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86 | ! GET NEXT FIELDS |
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87 | ! |
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88 | call pbgrib(lunit,inbuff,jpack,ilen,ierr) |
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89 | if(ierr.eq.-1) goto 30 ! EOF DETECTED |
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90 | if(ierr.lt.-1) goto 999 ! ERROR DETECTED |
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91 | |
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92 | ierr=1 |
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93 | |
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94 | ! Check whether we are on a little endian or on a big endian computer |
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95 | !******************************************************************** |
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96 | |
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97 | ! if (inbuff(1).eq.1112101447) then ! little endian, swap bytes |
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98 | ! iswap=1+ilen/4 |
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99 | ! call swap32(inbuff,iswap) |
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100 | ! else if (inbuff(1).ne.1196575042) then ! big endian |
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101 | ! stop 'subroutine gridcheck: corrupt GRIB data' |
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102 | ! endif |
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103 | |
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104 | call gribex(isec0,isec1,isec2,zsec2,isec3,zsec3,isec4, & |
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105 | zsec4,jpunp,inbuff,jpack,iword,yoper,ierr) |
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106 | if (ierr.ne.0) goto 999 ! ERROR DETECTED |
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107 | |
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108 | if(ifield.eq.1) then |
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109 | nxn(l)=isec2(2) |
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110 | nyn(l)=isec2(3) |
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111 | xaux1=real(isec2(5))/1000. |
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112 | xaux2=real(isec2(8))/1000. |
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113 | if(xaux1.gt.180) xaux1=xaux1-360.0 |
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114 | if(xaux2.gt.180) xaux2=xaux2-360.0 |
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115 | if(xaux1.lt.-180) xaux1=xaux1+360.0 |
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116 | if(xaux2.lt.-180) xaux2=xaux2+360.0 |
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117 | if (xaux2.lt.xaux1) xaux2=xaux2+360. |
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118 | yaux1=real(isec2(7))/1000. |
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119 | yaux2=real(isec2(4))/1000. |
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120 | xlon0n(l)=xaux1 |
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121 | ylat0n(l)=yaux1 |
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122 | dxn(l)=(xaux2-xaux1)/real(nxn(l)-1) |
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123 | dyn(l)=(yaux2-yaux1)/real(nyn(l)-1) |
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124 | nlev_ecn=isec2(12)/2-1 |
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125 | endif |
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126 | |
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127 | |
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128 | k=isec1(8) |
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129 | if(isec1(6).eq.131) iumax=max(iumax,nlev_ec-k+1) |
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130 | if(isec1(6).eq.135) iwmax=max(iwmax,nlev_ec-k+1) |
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131 | |
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132 | if(isec1(6).eq.129) then |
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133 | do j=0,nyn(l)-1 |
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134 | do i=0,nxn(l)-1 |
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135 | oron(i,j,l)=zsec4(nxn(l)*(nyn(l)-j-1)+i+1)/ga |
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136 | end do |
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137 | end do |
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138 | endif |
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139 | if(isec1(6).eq.172) then |
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140 | do j=0,nyn(l)-1 |
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141 | do i=0,nxn(l)-1 |
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142 | lsmn(i,j,l)=zsec4(nxn(l)*(nyn(l)-j-1)+i+1)/ga |
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143 | end do |
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144 | end do |
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145 | endif |
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146 | if(isec1(6).eq.160) then |
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147 | do j=0,nyn(l)-1 |
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148 | do i=0,nxn(l)-1 |
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149 | excessoron(i,j,l)=zsec4(nxn(l)*(nyn(l)-j-1)+i+1)/ga |
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150 | end do |
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151 | end do |
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152 | endif |
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153 | |
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154 | goto 10 !! READ NEXT LEVEL OR PARAMETER |
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155 | ! |
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156 | ! CLOSING OF INPUT DATA FILE |
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157 | ! |
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158 | 30 call pbclose(lunit,ierr) !! FINISHED READING / CLOSING GRIB FILE |
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159 | |
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160 | nuvzn=iumax |
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161 | nwzn=iwmax |
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162 | if(nuvzn.eq.nlev_ec) nwzn=nlev_ecn+1 |
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163 | |
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164 | if (nxn(l).gt.nxmaxn) then |
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165 | write(*,*) 'FLEXPART error: Too many grid points in x direction.' |
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166 | write(*,*) 'Reduce resolution of wind fields (file GRIDSPEC)' |
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167 | write(*,*) 'for nesting level ',l |
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168 | write(*,*) 'Or change parameter settings in file par_mod.' |
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169 | write(*,*) nxn(l),nxmaxn |
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170 | stop |
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171 | endif |
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172 | |
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173 | if (nyn(l).gt.nymaxn) then |
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174 | write(*,*) 'FLEXPART error: Too many grid points in y direction.' |
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175 | write(*,*) 'Reduce resolution of wind fields (file GRIDSPEC)' |
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176 | write(*,*) 'for nesting level ',l |
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177 | write(*,*) 'Or change parameter settings in file par_mod.' |
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178 | write(*,*) nyn(l),nymaxn |
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179 | stop |
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180 | endif |
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181 | |
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182 | if ((nuvzn.gt.nuvzmax).or.(nwzn.gt.nwzmax)) then |
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183 | write(*,*) 'FLEXPART error: Nested wind fields have too many'// & |
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184 | 'vertical levels.' |
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185 | write(*,*) 'Problem was encountered for nesting level ',l |
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186 | stop |
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187 | endif |
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188 | |
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189 | |
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190 | ! Output of grid info |
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191 | !******************** |
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192 | |
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193 | write(*,'(a,i2)') 'Nested domain #: ',l |
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194 | write(*,'(a,f10.2,a1,f10.2,a,f10.2)') ' Longitude range: ', & |
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195 | xlon0n(l),' to ',xlon0n(l)+(nxn(l)-1)*dxn(l), & |
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196 | ' Grid distance: ',dxn(l) |
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197 | write(*,'(a,f10.2,a1,f10.2,a,f10.2)') ' Latitude range: ', & |
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198 | ylat0n(l),' to ',ylat0n(l)+(nyn(l)-1)*dyn(l), & |
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199 | ' Grid distance: ',dyn(l) |
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200 | write(*,*) |
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201 | |
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202 | ! Determine, how much the resolutions in the nests are enhanced as |
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203 | ! compared to the mother grid |
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204 | !***************************************************************** |
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205 | |
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206 | xresoln(l)=dx/dxn(l) |
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207 | yresoln(l)=dy/dyn(l) |
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208 | |
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209 | ! Determine the mother grid coordinates of the corner points of the |
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210 | ! nested grids |
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211 | ! Convert first to geographical coordinates, then to grid coordinates |
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212 | !******************************************************************** |
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213 | |
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214 | xaux1=xlon0n(l) |
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215 | xaux2=xlon0n(l)+real(nxn(l)-1)*dxn(l) |
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216 | yaux1=ylat0n(l) |
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217 | yaux2=ylat0n(l)+real(nyn(l)-1)*dyn(l) |
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218 | |
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219 | xln(l)=(xaux1-xlon0)/dx |
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220 | xrn(l)=(xaux2-xlon0)/dx |
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221 | yln(l)=(yaux1-ylat0)/dy |
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222 | yrn(l)=(yaux2-ylat0)/dy |
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223 | |
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224 | |
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225 | if ((xln(l).lt.0.).or.(yln(l).lt.0.).or. & |
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226 | (xrn(l).gt.real(nxmin1)).or.(yrn(l).gt.real(nymin1))) then |
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227 | write(*,*) 'Nested domain does not fit into mother domain' |
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228 | write(*,*) 'For global mother domain fields, you can shift' |
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229 | write(*,*) 'shift the mother domain into x-direction' |
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230 | write(*,*) 'by setting nxshift (file par_mod) to a' |
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231 | write(*,*) 'positive value. Execution is terminated.' |
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232 | stop |
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233 | endif |
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234 | |
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235 | |
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236 | ! CALCULATE VERTICAL DISCRETIZATION OF ECMWF MODEL |
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237 | ! PARAMETER akm,bkm DESCRIBE THE HYBRID "ETA" COORDINATE SYSTEM |
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238 | |
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239 | numskip=nlev_ecn-nuvzn ! number of ecmwf model layers not used by FLEXPART |
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240 | do i=1,nwzn |
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241 | j=numskip+i |
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242 | k=nlev_ecn+1+numskip+i |
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243 | akmn(nwzn-i+1)=zsec2(10+j) |
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244 | bkmn(nwzn-i+1)=zsec2(10+k) |
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245 | end do |
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246 | |
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247 | ! |
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248 | ! CALCULATION OF AKZ, BKZ |
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249 | ! AKZ,BKZ: model discretization parameters at the center of each model |
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250 | ! layer |
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251 | ! |
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252 | ! Assign the 10 m winds to an artificial model level with akz=0 and bkz=1.0, |
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253 | ! i.e. ground level |
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254 | !***************************************************************************** |
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255 | |
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256 | akzn(1)=0. |
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257 | bkzn(1)=1.0 |
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258 | do i=1,nuvzn |
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259 | akzn(i+1)=0.5*(akmn(i+1)+akmn(i)) |
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260 | bkzn(i+1)=0.5*(bkmn(i+1)+bkmn(i)) |
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261 | end do |
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262 | nuvzn=nuvzn+1 |
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263 | |
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264 | ! Check, whether the heights of the model levels of the nested |
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265 | ! wind fields are consistent with those of the mother domain. |
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266 | ! If not, terminate model run. |
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267 | !************************************************************* |
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268 | |
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269 | do i=1,nuvz |
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270 | if ((akzn(i).ne.akz(i)).or.(bkzn(i).ne.bkz(i))) then |
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271 | write(*,*) 'FLEXPART error: The wind fields of nesting level',l |
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272 | write(*,*) 'are not consistent with the mother domain:' |
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273 | write(*,*) 'Differences in vertical levels detected.' |
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274 | stop |
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275 | endif |
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276 | end do |
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277 | |
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278 | do i=1,nwz |
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279 | if ((akmn(i).ne.akm(i)).or.(bkmn(i).ne.bkm(i))) then |
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280 | write(*,*) 'FLEXPART error: The wind fields of nesting level',l |
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281 | write(*,*) 'are not consistent with the mother domain:' |
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282 | write(*,*) 'Differences in vertical levels detected.' |
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283 | stop |
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284 | endif |
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285 | end do |
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286 | |
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287 | end do |
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288 | |
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289 | return |
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290 | |
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291 | 999 write(*,*) |
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292 | write(*,*) ' ###########################################'// & |
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293 | '###### ' |
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294 | write(*,*) ' FLEXPART SUBROUTINE GRIDCHECK:' |
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295 | write(*,*) ' CAN NOT OPEN INPUT DATA FILE '//wfnamen(l,ifn) |
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296 | write(*,*) ' FOR NESTING LEVEL ',k |
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297 | write(*,*) ' ###########################################'// & |
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298 | '###### ' |
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299 | stop |
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300 | |
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301 | end subroutine gridcheck_nests |
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