| 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 | ! CHANGE: 11/01/2008, Harald Sodemann, GRIB1/2 input with ECMWF grib_api * |
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| 36 | ! CHANGE: 03/12/2008, Harald Sodemann, change to f90 grib_api * |
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| 37 | !***************************************************************************** |
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| 38 | |
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| 39 | use grib_api |
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| 40 | use par_mod |
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| 41 | use com_mod |
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| 42 | use class_vtable |
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| 43 | |
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| 44 | implicit none |
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| 45 | |
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| 46 | !HSO parameters for grib_api |
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| 47 | integer :: ifile |
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| 48 | integer :: iret |
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| 49 | integer :: igrib |
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| 50 | integer :: gribVer,parCat,parNum,typSurf,valSurf,discipl |
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| 51 | #if defined CTBTO |
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| 52 | integer :: parId |
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| 53 | #endif |
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| 54 | integer :: gotGrib |
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| 55 | !HSO end |
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| 56 | integer :: i,j,k,l,ifn,ifield,iumax,iwmax,numskip,nlev_ecn |
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| 57 | integer :: nuvzn,nwzn |
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| 58 | real :: akmn(nwzmax),bkmn(nwzmax),akzn(nuvzmax),bkzn(nuvzmax) |
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| 59 | real(kind=4) :: xaux1,xaux2,yaux1,yaux2 |
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| 60 | real(kind=8) :: xaux1in,xaux2in,yaux1in,yaux2in |
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| 61 | |
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| 62 | ! VARIABLES AND ARRAYS NEEDED FOR GRIB DECODING |
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| 63 | |
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| 64 | ! dimension of isec2 at least (22+n), where n is the number of parallels or |
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| 65 | ! meridians in a quasi-regular (reduced) Gaussian or lat/long grid |
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| 66 | |
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| 67 | ! dimension of zsec2 at least (10+nn), where nn is the number of vertical |
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| 68 | ! coordinate parameters |
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| 69 | |
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| 70 | integer :: isec1(56),isec2(22+nxmaxn+nymaxn) |
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| 71 | real(kind=4) :: zsec2(60+2*nuvzmax),zsec4(jpunp) |
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| 72 | #if defined CTBTO |
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| 73 | real(kind=4) ::conversion_factor |
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| 74 | #endif |
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| 75 | |
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| 76 | !HSO grib api error messages |
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| 77 | character(len=24) :: gribErrorMsg = 'Error reading grib file' |
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| 78 | character(len=20) :: gribFunction = 'gridcheck_nests' |
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| 79 | |
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| 80 | |
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| 81 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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| 82 | !!!! Vtable related variables |
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| 83 | |
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| 84 | ! Paths to Vtables (current implementation will assume they are in the cwd |
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| 85 | ! This is a crappy place for these parameters. Need to move them. |
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| 86 | character(LEN=255), parameter :: VTABLE_ECMWF_GRIB1_PATH = & |
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| 87 | "Vtable_ecmwf_grib1", & |
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| 88 | VTABLE_ECMWF_GRIB2_PATH = & |
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| 89 | "Vtable_ecmwf_grib2", & |
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| 90 | VTABLE_ECMWF_GRIB1_2_PATH = & |
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| 91 | "Vtable_ecmwf_grib1_2" |
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| 92 | |
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| 93 | integer :: gribfile_type |
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| 94 | integer :: current_grib_level ! This "was" isec1(8) in previous version |
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| 95 | character(len=255) :: gribfile_name |
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| 96 | character(len=255) :: vtable_path |
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| 97 | character(len=15) :: fpname |
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| 98 | |
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| 99 | type(Vtable) :: my_vtable ! unallocated |
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| 100 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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| 101 | |
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| 102 | |
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| 103 | |
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| 104 | |
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| 105 | xresoln(0)=1. ! resolution enhancement for mother grid |
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| 106 | yresoln(0)=1. ! resolution enhancement for mother grid |
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| 107 | |
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| 108 | ! Loop about all nesting levels |
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| 109 | !****************************** |
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| 110 | |
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| 111 | do l=1,numbnests |
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| 112 | |
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| 113 | iumax=0 |
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| 114 | iwmax=0 |
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| 115 | |
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| 116 | if(ideltas.gt.0) then |
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| 117 | ifn=1 |
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| 118 | else |
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| 119 | ifn=numbwf |
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| 120 | endif |
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| 121 | |
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| 122 | |
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| 123 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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| 124 | !!!!!!!!!!!!!!!!!!! VTABLE code |
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| 125 | !!!!!!! Vtable choice |
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| 126 | gribfile_name = path(3)(1:length(3))//trim(wfname(ifn)) |
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| 127 | print *, 'gribfile_name: ', gribfile_name |
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| 128 | |
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| 129 | gribfile_type = vtable_detect_gribfile_type( gribfile_name ) |
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| 130 | |
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| 131 | print *, 'gribfile_type: ', gribfile_type |
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| 132 | |
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| 133 | if (gribfile_type .eq. VTABLE_GRIBFILE_TYPE_ECMWF_GRIB1) then |
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| 134 | vtable_path = VTABLE_ECMWF_GRIB1_PATH |
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| 135 | else if (gribfile_type .eq. VTABLE_GRIBFILE_TYPE_ECMWF_GRIB2) then |
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| 136 | vtable_path = VTABLE_ECMWF_GRIB2_PATH |
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| 137 | else if (gribfile_type .eq. VTABLE_GRIBFILE_TYPE_ECMWF_GRIB1_2) then |
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| 138 | vtable_path = VTABLE_ECMWF_GRIB1_2_PATH |
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| 139 | else |
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| 140 | print *, 'Unsupported gribfile_type: ', gribfile_type |
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| 141 | stop |
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| 142 | endif |
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| 143 | |
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| 144 | |
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| 145 | ! Load the Vtable into 'my_vtable' |
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| 146 | print *, 'Loading Vtable: ', vtable_path |
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| 147 | call vtable_load_by_name(vtable_path, my_vtable) |
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| 148 | print *, 'Vtable Initialized: ', my_vtable%initialized |
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| 149 | print *, 'Vtable num_entries: ', my_vtable%num_entries |
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| 150 | !!!!!!!!!!!!!!!!!!! VTABLE code |
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| 151 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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| 152 | |
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| 153 | |
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| 154 | |
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| 155 | |
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| 156 | |
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| 157 | ! |
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| 158 | ! OPENING OF DATA FILE (GRIB CODE) |
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| 159 | ! |
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| 160 | ifile=0 |
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| 161 | igrib=0 |
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| 162 | iret=0 |
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| 163 | |
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| 164 | 5 call grib_open_file(ifile,path(numpath+2*(l-1)+1) & |
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| 165 | (1:length(numpath+2*(l-1)+1))//trim(wfnamen(l,ifn)),'r',iret) |
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| 166 | if (iret.ne.GRIB_SUCCESS) then |
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| 167 | goto 999 ! ERROR DETECTED |
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| 168 | endif |
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| 169 | !turn on support for multi fields messages |
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| 170 | !call grib_multi_support_on |
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| 171 | |
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| 172 | gotGrib=0 |
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| 173 | ifield=0 |
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| 174 | 10 ifield=ifield+1 |
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| 175 | |
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| 176 | ! |
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| 177 | ! GET NEXT FIELDS |
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| 178 | ! |
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| 179 | call grib_new_from_file(ifile,igrib,iret) |
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| 180 | if (iret.eq.GRIB_END_OF_FILE) then |
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| 181 | goto 30 ! EOF DETECTED |
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| 182 | elseif (iret.ne.GRIB_SUCCESS) then |
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| 183 | goto 999 ! ERROR DETECTED |
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| 184 | endif |
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| 185 | |
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| 186 | |
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| 187 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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| 188 | !!!!!!!!!!!!!!!!!!! VTABLE code |
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| 189 | ! Get the fpname |
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| 190 | fpname = vtable_get_fpname(igrib, my_vtable) |
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| 191 | !print *, 'fpname: ', trim(fpname) |
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| 192 | |
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| 193 | |
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| 194 | !!!!!!!!!!!!!!!!!!! VTABLE code |
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| 195 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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| 196 | |
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| 197 | |
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| 198 | |
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| 199 | |
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| 200 | |
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| 201 | |
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| 202 | #if defined CTBTO |
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| 203 | conversion_factor=1.0 |
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| 204 | #endif |
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| 205 | |
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| 206 | !first see if we read GRIB1 or GRIB2 |
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| 207 | call grib_get_int(igrib,'editionNumber',gribVer,iret) |
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| 208 | call grib_check(iret,gribFunction,gribErrorMsg) |
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| 209 | |
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| 210 | if (gribVer.eq.1) then ! GRIB Edition 1 |
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| 211 | |
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| 212 | !print*,'GRiB Edition 1' |
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| 213 | !read the grib2 identifiers |
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| 214 | !call grib_get_int(igrib,'indicatorOfParameter',isec1(6),iret) |
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| 215 | !call grib_check(iret,gribFunction,gribErrorMsg) |
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| 216 | call grib_get_int(igrib,'level',current_grib_level,iret) |
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| 217 | call grib_check(iret,gribFunction,gribErrorMsg) |
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| 218 | |
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| 219 | else |
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| 220 | |
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| 221 | #if defined CTBTO |
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| 222 | call grib2check(igrib, fpname, conversion_factor) |
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| 223 | #endif |
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| 224 | |
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| 225 | call grib_get_int(igrib, 'level', current_grib_level, iret) |
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| 226 | call grib_check(iret, gribFunction, gribErrorMsg) |
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| 227 | |
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| 228 | endif |
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| 229 | |
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| 230 | |
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| 231 | |
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| 232 | !get the size and data of the values array |
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| 233 | if (trim(fpname) .ne. 'None') then |
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| 234 | call grib_get_real4_array(igrib,'values',zsec4,iret) |
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| 235 | #if defined CTBTO |
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| 236 | zsec4=zsec4/conversion_factor |
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| 237 | #endif |
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| 238 | call grib_check(iret,gribFunction,gribErrorMsg) |
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| 239 | endif |
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| 240 | |
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| 241 | !HSO get the required fields from section 2 in a gribex compatible manner |
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| 242 | if (ifield.eq.1) then |
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| 243 | call grib_get_int(igrib,'numberOfPointsAlongAParallel', & |
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| 244 | isec2(2),iret) |
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| 245 | call grib_check(iret,gribFunction,gribErrorMsg) |
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| 246 | call grib_get_int(igrib,'numberOfPointsAlongAMeridian', & |
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| 247 | isec2(3),iret) |
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| 248 | call grib_check(iret,gribFunction,gribErrorMsg) |
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| 249 | call grib_get_int(igrib,'numberOfVerticalCoordinateValues', & |
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| 250 | isec2(12),iret) |
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| 251 | call grib_check(iret,gribFunction,gribErrorMsg) |
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| 252 | !HSO get the size and data of the vertical coordinate array |
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| 253 | call grib_get_real4_array(igrib,'pv',zsec2,iret) |
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| 254 | call grib_check(iret,gribFunction,gribErrorMsg) |
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| 255 | |
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| 256 | nxn(l)=isec2(2) |
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| 257 | nyn(l)=isec2(3) |
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| 258 | nlev_ecn=isec2(12)/2-1 |
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| 259 | endif ! ifield |
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| 260 | |
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| 261 | !HSO get the second part of the grid dimensions only from GRiB1 messages |
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| 262 | #if defined CTBTO |
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| 263 | if (gotGrib.eq.0) then |
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| 264 | #else |
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| 265 | if ((gribVer.eq.1).and.(gotGrib.eq.0)) then |
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| 266 | #endif |
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| 267 | call grib_get_real8(igrib,'longitudeOfFirstGridPointInDegrees', & |
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| 268 | xaux1in,iret) |
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| 269 | call grib_check(iret,gribFunction,gribErrorMsg) |
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| 270 | call grib_get_real8(igrib,'longitudeOfLastGridPointInDegrees', & |
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| 271 | xaux2in,iret) |
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| 272 | call grib_check(iret,gribFunction,gribErrorMsg) |
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| 273 | call grib_get_real8(igrib,'latitudeOfLastGridPointInDegrees', & |
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| 274 | yaux1in,iret) |
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| 275 | call grib_check(iret,gribFunction,gribErrorMsg) |
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| 276 | call grib_get_real8(igrib,'latitudeOfFirstGridPointInDegrees', & |
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| 277 | yaux2in,iret) |
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| 278 | call grib_check(iret,gribFunction,gribErrorMsg) |
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| 279 | xaux1=xaux1in |
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| 280 | xaux2=xaux2in |
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| 281 | yaux1=yaux1in |
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| 282 | yaux2=yaux2in |
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| 283 | if(xaux1.gt.180) xaux1=xaux1-360.0 |
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| 284 | if(xaux2.gt.180) xaux2=xaux2-360.0 |
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| 285 | if(xaux1.lt.-180) xaux1=xaux1+360.0 |
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| 286 | if(xaux2.lt.-180) xaux2=xaux2+360.0 |
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| 287 | if (xaux2.lt.xaux1) xaux2=xaux2+360. |
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| 288 | xlon0n(l)=xaux1 |
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| 289 | ylat0n(l)=yaux1 |
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| 290 | dxn(l)=(xaux2-xaux1)/real(nxn(l)-1) |
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| 291 | dyn(l)=(yaux2-yaux1)/real(nyn(l)-1) |
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| 292 | gotGrib=1 |
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| 293 | endif ! ifield.eq.1 |
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| 294 | |
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| 295 | k=current_grib_level |
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| 296 | if(trim(fpname) .eq. 'UU') iumax=max(iumax,nlev_ec-k+1) |
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| 297 | if(trim(fpname) .eq. 'ETADOT') iwmax=max(iwmax,nlev_ec-k+1) |
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| 298 | |
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| 299 | if(trim(fpname) .eq. 'ORO') then |
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| 300 | do j=0,nyn(l)-1 |
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| 301 | do i=0,nxn(l)-1 |
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| 302 | oron(i,j,l)=zsec4(nxn(l)*(nyn(l)-j-1)+i+1)/ga |
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| 303 | end do |
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| 304 | end do |
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| 305 | endif |
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| 306 | if(trim(fpname) .eq. 'LSM') then |
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| 307 | do j=0,nyn(l)-1 |
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| 308 | do i=0,nxn(l)-1 |
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| 309 | lsmn(i,j,l)=zsec4(nxn(l)*(nyn(l)-j-1)+i+1)/ga |
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| 310 | end do |
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| 311 | end do |
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| 312 | endif |
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| 313 | if(trim(fpname) .eq. 'EXCESSORO') then |
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| 314 | do j=0,nyn(l)-1 |
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| 315 | do i=0,nxn(l)-1 |
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| 316 | excessoron(i,j,l)=zsec4(nxn(l)*(nyn(l)-j-1)+i+1)/ga |
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| 317 | end do |
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| 318 | end do |
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| 319 | endif |
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| 320 | |
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| 321 | call grib_release(igrib) |
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| 322 | goto 10 !! READ NEXT LEVEL OR PARAMETER |
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| 323 | ! |
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| 324 | ! CLOSING OF INPUT DATA FILE |
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| 325 | ! |
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| 326 | |
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| 327 | 30 call grib_close_file(ifile) |
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| 328 | |
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| 329 | !error message if no fields found with correct first longitude in it |
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| 330 | if (gotGrib.eq.0) then |
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| 331 | print*,'***ERROR: input file needs to contain GRiB1 formatted'// & |
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| 332 | 'messages' |
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| 333 | stop |
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| 334 | endif |
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| 335 | |
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| 336 | nuvzn=iumax |
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| 337 | nwzn=iwmax |
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| 338 | if(nuvzn.eq.nlev_ec) nwzn=nlev_ecn+1 |
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| 339 | |
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| 340 | if (nxn(l).gt.nxmaxn) then |
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| 341 | write(*,*) 'FLEXPART error: Too many grid points in x direction.' |
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| 342 | write(*,*) 'Reduce resolution of wind fields (file GRIDSPEC)' |
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| 343 | write(*,*) 'for nesting level ',l |
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| 344 | write(*,*) 'Or change parameter settings in file par_mod.' |
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| 345 | write(*,*) nxn(l),nxmaxn |
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| 346 | stop |
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| 347 | endif |
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| 348 | |
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| 349 | if (nyn(l).gt.nymaxn) then |
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| 350 | write(*,*) 'FLEXPART error: Too many grid points in y direction.' |
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| 351 | write(*,*) 'Reduce resolution of wind fields (file GRIDSPEC)' |
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| 352 | write(*,*) 'for nesting level ',l |
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| 353 | write(*,*) 'Or change parameter settings in file par_mod.' |
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| 354 | write(*,*) nyn(l),nymaxn |
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| 355 | stop |
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| 356 | endif |
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| 357 | |
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| 358 | if ((nuvzn.gt.nuvzmax).or.(nwzn.gt.nwzmax)) then |
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| 359 | write(*,*) 'FLEXPART error: Nested wind fields have too many'// & |
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| 360 | 'vertical levels.' |
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| 361 | write(*,*) 'Problem was encountered for nesting level ',l |
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| 362 | stop |
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| 363 | endif |
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| 364 | |
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| 365 | |
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| 366 | ! Output of grid info |
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| 367 | !******************** |
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| 368 | |
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| 369 | write(*,'(a,i2)') 'Nested domain #: ',l |
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| 370 | write(*,'(a,f10.2,a1,f10.2,a,f10.2)') ' Longitude range: ', & |
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| 371 | xlon0n(l),' to ',xlon0n(l)+(nxn(l)-1)*dxn(l), & |
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| 372 | ' Grid distance: ',dxn(l) |
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| 373 | write(*,'(a,f10.2,a1,f10.2,a,f10.2)') ' Latitude range: ', & |
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| 374 | ylat0n(l),' to ',ylat0n(l)+(nyn(l)-1)*dyn(l), & |
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| 375 | ' Grid distance: ',dyn(l) |
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| 376 | write(*,*) |
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| 377 | |
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| 378 | ! Determine, how much the resolutions in the nests are enhanced as |
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| 379 | ! compared to the mother grid |
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| 380 | !***************************************************************** |
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| 381 | |
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| 382 | xresoln(l)=dx/dxn(l) |
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| 383 | yresoln(l)=dy/dyn(l) |
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| 384 | |
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| 385 | ! Determine the mother grid coordinates of the corner points of the |
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| 386 | ! nested grids |
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| 387 | ! Convert first to geographical coordinates, then to grid coordinates |
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| 388 | !******************************************************************** |
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| 389 | |
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| 390 | xaux1=xlon0n(l) |
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| 391 | xaux2=xlon0n(l)+real(nxn(l)-1)*dxn(l) |
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| 392 | yaux1=ylat0n(l) |
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| 393 | yaux2=ylat0n(l)+real(nyn(l)-1)*dyn(l) |
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| 394 | |
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| 395 | xln(l)=(xaux1-xlon0)/dx |
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| 396 | xrn(l)=(xaux2-xlon0)/dx |
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| 397 | yln(l)=(yaux1-ylat0)/dy |
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| 398 | yrn(l)=(yaux2-ylat0)/dy |
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| 399 | |
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| 400 | |
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| 401 | if ((xln(l).lt.0.).or.(yln(l).lt.0.).or. & |
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| 402 | (xrn(l).gt.real(nxmin1)).or.(yrn(l).gt.real(nymin1))) then |
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| 403 | write(*,*) 'Nested domain does not fit into mother domain' |
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| 404 | write(*,*) 'For global mother domain fields, you can shift' |
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| 405 | write(*,*) 'shift the mother domain into x-direction' |
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| 406 | write(*,*) 'by setting nxshift (file par_mod) to a' |
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| 407 | write(*,*) 'positive value. Execution is terminated.' |
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| 408 | stop |
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| 409 | endif |
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| 410 | |
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| 411 | |
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| 412 | ! CALCULATE VERTICAL DISCRETIZATION OF ECMWF MODEL |
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| 413 | ! PARAMETER akm,bkm DESCRIBE THE HYBRID "ETA" COORDINATE SYSTEM |
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| 414 | |
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| 415 | numskip=nlev_ecn-nuvzn ! number of ecmwf model layers not used by FLEXPART |
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| 416 | do i=1,nwzn |
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| 417 | j=numskip+i |
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| 418 | k=nlev_ecn+1+numskip+i |
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| 419 | akmn(nwzn-i+1)=zsec2(j) |
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| 420 | bkmn(nwzn-i+1)=zsec2(k) |
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| 421 | end do |
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| 422 | |
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| 423 | ! |
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| 424 | ! CALCULATION OF AKZ, BKZ |
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| 425 | ! AKZ,BKZ: model discretization parameters at the center of each model |
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| 426 | ! layer |
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| 427 | ! |
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| 428 | ! Assign the 10 m winds to an artificial model level with akz=0 and bkz=1.0, |
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| 429 | ! i.e. ground level |
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| 430 | !***************************************************************************** |
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| 431 | |
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| 432 | akzn(1)=0. |
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| 433 | bkzn(1)=1.0 |
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| 434 | do i=1,nuvzn |
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| 435 | akzn(i+1)=0.5*(akmn(i+1)+akmn(i)) |
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| 436 | bkzn(i+1)=0.5*(bkmn(i+1)+bkmn(i)) |
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| 437 | end do |
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| 438 | nuvzn=nuvzn+1 |
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| 439 | |
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| 440 | ! Check, whether the heights of the model levels of the nested |
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| 441 | ! wind fields are consistent with those of the mother domain. |
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| 442 | ! If not, terminate model run. |
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| 443 | !************************************************************* |
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| 444 | |
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| 445 | do i=1,nuvz |
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| 446 | if ((akzn(i).ne.akz(i)).or.(bkzn(i).ne.bkz(i))) then |
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| 447 | write(*,*) 'FLEXPART error: The wind fields of nesting level',l |
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| 448 | write(*,*) 'are not consistent with the mother domain:' |
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| 449 | write(*,*) 'Differences in vertical levels detected.' |
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| 450 | stop |
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| 451 | endif |
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| 452 | end do |
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| 453 | |
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| 454 | do i=1,nwz |
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| 455 | if ((akmn(i).ne.akm(i)).or.(bkmn(i).ne.bkm(i))) then |
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| 456 | write(*,*) 'FLEXPART error: The wind fields of nesting level',l |
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| 457 | write(*,*) 'are not consistent with the mother domain:' |
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| 458 | write(*,*) 'Differences in vertical levels detected.' |
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| 459 | stop |
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| 460 | endif |
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| 461 | end do |
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| 462 | |
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| 463 | end do |
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| 464 | |
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| 465 | return |
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| 466 | |
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| 467 | 999 write(*,*) |
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| 468 | write(*,*) ' ###########################################'// & |
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| 469 | '###### ' |
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| 470 | write(*,*) ' FLEXPART SUBROUTINE GRIDCHECK:' |
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| 471 | write(*,*) ' CAN NOT OPEN INPUT DATA FILE '//wfnamen(l,ifn) |
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| 472 | write(*,*) ' FOR NESTING LEVEL ',k |
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| 473 | write(*,*) ' ###########################################'// & |
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| 474 | '###### ' |
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| 475 | stop |
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| 476 | |
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| 477 | end subroutine gridcheck_nests |
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