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README.VAR
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------------------------
WRFDA PUBLIC DOMAIN NOTICE
------------------------
WRF Data Assimilation System (WRFDA) was developed at the National
Center for Atmospheric Research (NCAR) which is operated by the
University Corporation for Atmospheric Research (UCAR). NCAR and
UCAR make no proprietary claims, either statutory or otherwise,
to this version and release of WRFDA and consider WRFDA to be in
the public domain for use by any person or entity for any purpose
without any fee or charge. UCAR requests that any WRFDA user include
this notice on any partial or full copies of WRFDA. WRFDA is provided
on an "AS IS" basis and any warranties, either express or implied,
including but not limited to implied warranties of non-infringement,
originality, merchantability and fitness for a particular purpose,
are disclaimed. In no event shall UCAR be liable for any damages,
whatsoever, whether direct, indirect, consequential or special, that
arise out of or in connection with the access, use or performance of
WRFDA, including infringement actions.
======================================
This is the main directory for the WRFDA Version 3 source code release.
======================================
V3.1 Release Notes:
-----------------------
Version 3.1 is released on April 9, 2009.
- For more information on WRFDA, visit the new WRFDA Users home page
http://www.mmm.ucar.edu/wrf/users/wrfda/index.html
and read the online User's Gudie.
- 4DVAR and radiance data assimilation capabilities are included in V3.1.
- New README files under WRFDA/var (README.namelist, README.basics,
README.radiance)
- WRFDA V3.1 executable will work with V3.0 wrfinput/wrfbdy (but requires
inserting a new namelist variable use_baseparam_fr_nml in &dynamics).
However, rerunning V3.1 WPS/real.exe is recommended.
- Changes to namelist variables.
* Some obsolete or unused namelist variables are removed, some new namelist
variables are added, purposes of some namelist variables are changed.
See WRFDA/var/README.namelist for descriptions of supported namelist
variables.
- Changes to obsproc:
* the executable is renamed to be obsproc.exe from 3dvar_obs.exe and
namelist.3dvar_obs is renamed to be namelist.obsproc to reflect
its capabilitiy of producing WRFDA-ready observations for 3DVAR, FGAT,
or 4DVAR applications.
See WRFDA/var/obsproc/README.
* compilation of obsproc.exe is included in "compile all_wrfvar"
- Changes to diagnostic output files
* gts_omb_oma becomes gts_omb_oma_01 (01 indicates outer loop index)
* observations that fail check_max_iv are listed in rej_obs_conv_01.000
( 01 is outer loop index, 000 is processor id)
* qcstat_conv_01 (01 indicates outer loop index) contains observation
number counts
- Most of the scripts under WRFDA/var/scripts are removed from the main source
code tar file. They can still be downloaded separately.
See http://www.mmm.ucar.edu/wrf/users/wrfda/download/tools.html
For questions, send mail to [email protected]
======================================
WRFDA update history:
- V3.0: Apr 4, 2008
- V3.0.1: Aug 6, 2008
- V3.0.1.1: Aug 29, 2008
- V3.1: Apr 9, 2009
======================================
How to compile and run?
-----------------------
- In WRFDA directory, type 'configure wrfda - this will create a configure.wrf
file that has appropriate compile options for the supported computers.
Note: WRFDA requires netCDF, BLAS, LAPACK libraries.
If using PREPBUFR data, NCEP BUFR library is required.
If using radiance data, NCEP BUFR and CRTM 1.2/RTTOV 8.7 are required.
Install required libraries and set environment variables properly
before you type 'configure wrfda'. For example,
setenv NETCDF /usr/local/netcdf-pgi
setenv BLAS /usr/local/blas
setenv LAPACK /usr/local/lapack
setenv BUFR /usr/local/bufr (optional)
setenv CRTM /usr/local/crtm_1_2 (optional)
setenv RTTOV /usr/local/rttov87 (optional)
- Type 'compile all_wrfvar' when your are ready:
- If sucessful, this will create da_wrfvar.exe and a set of utilities
in directory WRFDA/var/build/.
- cd to the appropriate test or run directory to run WRFDA.
Some basic instruction/namelist.input are available in sub-directories
of WRFDA/var/test.