Download WRF Model

WPS
supplied with Vtable files for many sources of meteorological data, and the appropriate
Vtable may simply be symbolically linked to the file Vtable, which is the Vtable name
expected by ungrib. For example, if the GRIB data are from the GFS model, this could be
accomplished with
> ln -s ungrib/Variable_Tables/Vtable.GFS Vtable
The ungrib program will try to read GRIB files named GRIBFILE.AAA,
GRIBFILE.AAB, …, GRIBFILE.ZZZ. In order to simplify the work of linking the GRIB
files to these filenames, a shell script, link_grib.csh, is provided. The link_grib.csh script
takes as a command-line argument a list of the GRIB files to be linked. For example, if
the GRIB data were downloaded to the directory /data/gfs, the files could be linked with
link_grib.csh as follows:
> ls /data/gfs
-rw-r--r-- 1 42728372 gfs_080324_12_00
-rw-r--r-- 1 48218303 gfs_080324_12_06
> ./link_grib.csh /data/gfs/gfs*
After linking the GRIB files and Vtable, a listing of the WPS directory should look
something like the following:
> ls
drwxr-xr-x
-rwxr-xr-x
-rwxr-xr-x
-rw-r--r--rwxr-xr-x
-rw-r--r--rw-r--r--rw-r--r-drwxr-xr-x
lrwxrwxrwx
-rw-r--r-lrwxrwxrwx
lrwxrwxrwx
-rwxr-xr-x
drwxr-xr-x
lrwxrwxrwx
-rw-r--r--rw-r--r--rw-r--r--rw-r--r--rw-r--r-drwxr-xr-x
lrwxrwxrwx
drwxr-xr-x
lrwxrwxrwx
2
1
1
1
1
1
1
1
4
1
1
1
1
1
3
1
1
1
1
1
1
4
1
3
1
4096
1672
3510
85973
4257
2486
1957004
4745324
4096
23
11169
38
38
1328
4096
23
1094
1987
1075
652
4786
4096
21
4096
33
arch
clean
compile
compile.output
configure
configure.wps
geo_em.d01.nc
geo_em.d02.nc
geogrid
geogrid.exe -> geogrid/src/geogrid.exe
geogrid.log
GRIBFILE.AAA -> /data/gfs/gfs_080324_12_00
GRIBFILE.AAB -> /data/gfs/gfs_080324_12_06
link_grib.csh
metgrid
metgrid.exe -> metgrid/src/metgrid.exe
namelist.wps
namelist.wps.all_options
namelist.wps.global
namelist.wps.nmm
README
ungrib
ungrib.exe -> ungrib/src/ungrib.exe
util
Vtable -> ungrib/Variable_Tables/Vtable.GFS
After editing the namelist.wps file and linking the appropriate Vtable and GRIB files, the
ungrib.exe executable may be run to produce files of meteorological data in the
intermediate format. Ungrib may be run by simply typing the following:
> ./ungrib.exe >& ungrib.output
WRF-ARW V3: User’s Guide
3-15