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2 WRFDA PUBLIC DOMAIN NOTICE
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5 WRF Data Assimilation System (WRFDA) was developed at the National
6 Center for Atmospheric Research (NCAR) which is operated by the
7 University Corporation for Atmospheric Research (UCAR). NCAR and
8 UCAR make no proprietary claims, either statutory or otherwise,
9 to this version and release of WRFDA and consider WRFDA to be in
10 the public domain for use by any person or entity for any purpose
11 without any fee or charge. UCAR requests that any WRFDA user include
12 this notice on any partial or full copies of WRFDA. WRFDA is provided
13 on an "AS IS" basis and any warranties, either express or implied,
14 including but not limited to implied warranties of non-infringement,
15 originality, merchantability and fitness for a particular purpose,
16 are disclaimed. In no event shall UCAR be liable for any damages,
17 whatsoever, whether direct, indirect, consequential or special, that
18 arise out of or in connection with the access, use or performance of
19 WRFDA, including infringement actions.
21 ======================================
22 This is the main directory for the WRFDA Version 3 source code release.
23 ======================================
26 -----------------------
28 Version 3.2 is released on March 31, 2010.
30 - Improvements on multiple outer loop which handling nonlinearity issue
32 - Adjoint sensitivity tool
34 - Improved software performance
36 - Improved WRF adjoint codes.
39 -----------------------
41 Version 3.1.1 is released on July 31, 2009.
43 - Radiance data assimilation using K Matrix capability is completed in V3.1.1 release,
44 which dramatically speedup the analysis. To use K Matrix , please
45 set USE_CRTM_KMATRIX=true in wrfvar14@namelist.input.
46 Note: it only applied on CRTM in V3.1.1.
48 - Improved software portability; only NETCDF library is mandatory
49 if only LITTLE_R formated conventional observational data to be used.
50 To use Prepbufr observational files, just set environmental variable
51 BUFR equal to 1 before the code is compiled. To use radiance BUFR
52 format data, CRTM or RTTOV is needed.
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58 Version 3.1 is released on April 9, 2009.
60 - For more information on WRFDA, visit the new WRFDA Users home page
61 http://www.mmm.ucar.edu/wrf/users/wrfda/index.html
62 and read the online User's Gudie.
64 - 4DVAR and radiance data assimilation capabilities are included in V3.1.
66 - New README files under WRFDA/var (README.namelist, README.basics,
69 - WRFDA V3.1 executable will work with V3.0 wrfinput/wrfbdy (but requires
70 inserting a new namelist variable use_baseparam_fr_nml in &dynamics).
71 However, rerunning V3.1 WPS/real.exe is recommended.
73 - Changes to namelist variables.
74 * Some obsolete or unused namelist variables are removed, some new namelist
75 variables are added, purposes of some namelist variables are changed.
76 See WRFDA/var/README.namelist for descriptions of supported namelist
80 * the executable is renamed to be obsproc.exe from 3dvar_obs.exe and
81 namelist.3dvar_obs is renamed to be namelist.obsproc to reflect
82 its capabilitiy of producing WRFDA-ready observations for 3DVAR, FGAT,
83 or 4DVAR applications.
84 See WRFDA/var/obsproc/README.
85 * compilation of obsproc.exe is included in "compile all_wrfvar"
87 - Changes to diagnostic output files
88 * gts_omb_oma becomes gts_omb_oma_01 (01 indicates outer loop index)
89 * observations that fail check_max_iv are listed in rej_obs_conv_01.000
90 ( 01 is outer loop index, 000 is processor id)
91 * qcstat_conv_01 (01 indicates outer loop index) contains observation
94 - Most of the scripts under WRFDA/var/scripts are removed from the main source
95 code tar file. They can still be downloaded separately.
96 See http://www.mmm.ucar.edu/wrf/users/wrfda/download/tools.html
98 For questions, send mail to wrfhelp@ucar.edu
100 ======================================
102 WRFDA update history:
105 - V3.0.1: Aug 6, 2008
106 - V3.0.1.1: Aug 29, 2008
108 - V3.1.1: Jul 31, 2009
111 ======================================
113 How to compile and run?
114 -----------------------
116 - In WRFDA directory, type 'configure wrfda - this will create a configure.wrf
117 file that has appropriate compile options for the supported computers.
119 Note: WRFDA only requires netCDF library starting with V3.1.1.
120 If using prepbufr or/and radiance data, NCEP BUFR and CRTM 1.2/RTTOV 8.7 are required.
121 Install required libraries and set environment variables properly
122 before you type 'configure wrfda'. For example,
124 setenv NETCDF /usr/local/netcdf-pgi
125 setenv BUFR 1 (optional)
126 setenv CRTM /usr/local/crtm_1_2 (optional)
127 setenv RTTOV /usr/local/rttov87 (optional)
129 - Type 'compile all_wrfvar' when your are ready:
131 - If sucessful, this will create da_wrfvar.exe and a set of utilities
132 in directory WRFDA/var/build/.
134 - cd to the appropriate test or run directory to run WRFDA.
136 Some basic instruction/namelist.input are available in sub-directories