WRF ARW User's Guide - MMM - UCAR

WRF-VAR
-rwxr-xr-x 1 noname users 1938732 Mar 23 09:29 var/build/gen_be_stage4_regional.exe
-rwxr-xr-x 1 noname users 1752352 Mar 23 09:29 var/obsproc/src/obsproc.exe
da_wrfvar.exe is the main executable for running WRF-Var. Make sure it is created after
the compilation. Sometimes (unfortunately) it is possible that other utilities get successfully
compiled, while the main da_wrfvar.exe fails; please check the compilation
log file carefully to figure out the problem.
The basic gen_be utility for regional model consists of gen_be_stage0_wrf.exe,
gen_be_stage1.exe, gen_be_stage2.exe, gen_be_stage2a.exe,
gen_be_stage3.exe, gen_be_stage4_regional.exe, and gen_be_diags.exe.
da_updated_bc.exe is used for updating WRF boundary condition after a new WRF-
Var analysis is generated.
da_advance_time.exe is a very handy and useful tool for date/time manipulation. Type
“da_advance_time.exe” to see its usage instruction.
In addition to the executables for running WRF-Var and gen_be, obsproc.exe (the executable
for preparing conventional data for WRF-Var) compilation is also included in
“./compile all_wrfvar”.
Installing WRFNL and WRFPLUS (For 4D-Var only)
If you intend to run WRF 4D-Var, it is necessary to have installed the WRFNL (WRF
nonlinear model) and WRFPLUS (WRF adjoint and tangent linear model). WRFNL is a
modified version of WRF V3.1 and can only be used for 4D-Var purposes. WRFPLUS
contains the adjoint and tangent linear models based on a simplified WRF model, which
only includes some simple physical processes such as vertical diffusion and large-scale
condensation.
To install WRFNL:
• Get the WRF zipped tar file from:
http://www.mmm.ucar.edu/wrf/users/download/get_source.html
• Unzip and untar the file , name the directory WRFNL
> cd WRFNL
> gzip -cd WRFV3.TAR.gz | tar -xf - ; mv WRFV3 WRFNL
• Get the WRFNL patch zipped tar file from:
http://www.mmm.ucar.edu/wrf/users/wrfda/download/wrfnl.html
• unzip and untar the WRFNL patch file
WRF-ARW V3: User’s Guide 6-6