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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 ======================================
25 V3.3.1 Release Notes :
28 Version 3.3.1 is released on September. 27, 2011.
30 - WRF 4D-Var has been improved on lateral boundary condition control, analysis scheme for surface observation etc.
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37 -----------------------
39 Version 3.3 is released on April 6, 2011.
41 - RTTOV interfaces has been upgraded to version 10.0
42 Please download RTTOV v10.0 and install it in appropriate location
43 if you want to use RTTOV to assimilate radiance observation with bufr format
45 - crtm_atmosphere is removed from the namelist.
46 Now the CRTM reference climatology is determined inside WRFDA based on
50 The WRFPLUS (WRF adjoint and tangent linear model) has been upgraded to V3.3
51 and it is consistent with the released WRFV version 3.3. However, only dry dynamic
52 processes are included in WRFPLUS version 3.3 and only serial run is supported
54 WRFDA is also upgraded to consistent with WRFPLUS version 3.3 and the new 4D-Var
55 system is a single executable application. Please refer to Users' guide for the
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63 Version 3.2.1 is released on August 18, 2010.
65 - CRTM interface for radiance assimilation has been upgraded to version 2.0.2.
67 - CRTM V2.0.2 has been included as an internal library in WRFDA codes.
68 Setting environmental variable CRTM to ANYTHING to activate the CRTM installation
69 during WRFDA compilation.
71 - Multivariate gen_be method which considers the correlations between moisture and
72 other variables is included, but the support for the new capability will be very
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80 Version 3.2 is released on March 31, 2010.
82 - Improvements on multiple outer loop which handling nonlinearity issue
84 - Adjoint sensitivity tool
86 - Improved software performance
88 - Improved WRF adjoint codes.
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93 Version 3.1.1 is released on July 31, 2009.
95 - Radiance data assimilation using K Matrix capability is completed in V3.1.1 release,
96 which dramatically speedup the analysis. To use K Matrix , please
97 set USE_CRTM_KMATRIX=true in wrfvar14@namelist.input.
98 Note: it only applied on CRTM in V3.1.1.
100 - Improved software portability; only NETCDF library is mandatory
101 if only LITTLE_R formated conventional observational data to be used.
102 To use Prepbufr observational files, just set environmental variable
103 BUFR equal to 1 before the code is compiled. To use radiance BUFR
104 format data, CRTM or RTTOV is needed.
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110 Version 3.1 is released on April 9, 2009.
112 - For more information on WRFDA, visit the new WRFDA Users home page
113 http://www.mmm.ucar.edu/wrf/users/wrfda/index.html
114 and read the online User's Gudie.
116 - 4DVAR and radiance data assimilation capabilities are included in V3.1.
118 - New README files under WRFDA/var (README.namelist, README.basics,
121 - WRFDA V3.1 executable will work with V3.0 wrfinput/wrfbdy (but requires
122 inserting a new namelist variable use_baseparam_fr_nml in &dynamics).
123 However, rerunning V3.1 WPS/real.exe is recommended.
125 - Changes to namelist variables.
126 * Some obsolete or unused namelist variables are removed, some new namelist
127 variables are added, purposes of some namelist variables are changed.
128 See WRFDA/var/README.namelist for descriptions of supported namelist
131 - Changes to obsproc:
132 * the executable is renamed to be obsproc.exe from 3dvar_obs.exe and
133 namelist.3dvar_obs is renamed to be namelist.obsproc to reflect
134 its capabilitiy of producing WRFDA-ready observations for 3DVAR, FGAT,
135 or 4DVAR applications.
136 See WRFDA/var/obsproc/README.
137 * compilation of obsproc.exe is included in "compile all_wrfvar"
139 - Changes to diagnostic output files
140 * gts_omb_oma becomes gts_omb_oma_01 (01 indicates outer loop index)
141 * observations that fail check_max_iv are listed in rej_obs_conv_01.000
142 ( 01 is outer loop index, 000 is processor id)
143 * qcstat_conv_01 (01 indicates outer loop index) contains observation
146 - Most of the scripts under WRFDA/var/scripts are removed from the main source
147 code tar file. They can still be downloaded separately.
148 See http://www.mmm.ucar.edu/wrf/users/wrfda/download/tools.html
150 For questions, send mail to wrfhelp@ucar.edu
152 ======================================
154 WRFDA update history:
157 - V3.0.1: Aug 6, 2008
158 - V3.0.1.1: Aug 29, 2008
160 - V3.1.1: Jul 31, 2009
162 - V3.2.1: Aug 18, 2010
164 ======================================
166 How to compile and run?
167 -----------------------
169 - In WRFDA directory, type 'configure wrfda - this will create a configure.wrf
170 file that has appropriate compile options for the supported computers.
172 Note: WRFDA only requires netCDF library starting with V3.1.1.
173 Install netCDF library with the same compiler that will be used to compile WRFDA.
174 NCEP BUFR and CRTM 2.0.2 libs are included in the WRFDA tar file.
175 Set environment variables properly according to your applications
176 before you type 'configure wrfda'. For example,
178 setenv NETCDF /usr/local/netcdf-pgi
179 setenv BUFR 1 (optional, set to compile WRFDA with NCEP BUFR capability)
180 setenv CRTM 1 (optional, set to compile WRFDA with CRTM capability)
181 setenv RTTOV /usr/local/rttov10 (optional, set to compile WRFDA with RTTOV capability)
183 - Type 'compile all_wrfvar' when your are ready:
185 - If sucessful, this will create da_wrfvar.exe and a set of utilities
186 in directory WRFDA/var/build/.
188 - cd to the appropriate test or run directory to run WRFDA.
190 Some basic instruction/namelist.input are available in sub-directories