<p><b>xinzhang</b> 2009-03-17 12:51:12 -0600 (Tue, 17 Mar 2009)</p><p>Save for Chapter 6 updates.<br>
</p><hr noshade><pre><font color="gray">Modified: trunk/wrf/UsersGuide/users_guide_chap6.doc
===================================================================
--- trunk/wrf/UsersGuide/users_guide_chap6.doc 2009-03-13 23:16:40 UTC (rev 142)
+++ trunk/wrf/UsersGuide/users_guide_chap6.doc 2009-03-17 18:51:12 UTC (rev 143)
@@ -1,11 +1,11 @@
-ࡱ
-
+
da_advance_time.exe is a very handy and useful tool for date manipulation. Type da_advance_time to see its usage instruction.
Executables for running WRF-Var, gen_be and 3dvar_obs.exe are created at this step. Proceed to the next section to learn how to run OBSPROC.
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 WRF V3.1, the modifications on WRF V3.1 include some parallel control which enable MPMD (Multiple Program Multiple Data) and more fields output in IO stream history 2. WRFPLUS is the adjoint and tangent linear model based on a simplified WRF model, which only include some simple physical processes such as vertical diffusion and large-scale condensation.
+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 line
ar model). WRFNL is a modified WRF V3.1 and can only be used for 4D-Var purposes. WRFPLUS is the adjoint and tangent linear model based on a simplified WRF model, which only include some simple physical processes such as vertical diffusion and large-scale condensation.
To install WRFNL:
Get the WRF zipped tar file from HYPERLINK "http://www.mmm.ucar.edu/wrf/users/download/get_source.html" http://www.mmm.ucar.edu/wrf/users/download/get_source.html
unzip and untar the file , rename the directory name to WRFNL
@@ -127,15 +127,25 @@
cd WRFNL
unzip and untar the WRFNL patch file in the WRFNL directory
gzip -cd WRFNL_PATCH.TAR.gz | tar -xf -
+./configure wrfplus
+serial means single processor
+dmpar means Distributed Memory Parallel (MPI)
+please select 0 for the second option for no nesting
+./compile wrf
+ls -ls main/*.exe
+if you built a real-data case, you should see wrf.exe
+To install WRFPLUS:
+Get the WRFPLUS zipped tar file from HYPERLINK "http://www.mmm.ucar.edu/wrf/users/download/get_source.html" http://www.mmm.ucar.edu/wrf/users/download/get_source.html
+unzip and untar the file to WRFPLUS
+gzip -cd WRFPLUS.TAR.gz | tar -xf -
+cd WRFPLUS
./configure
serial means single processor
dmpar means Distributed Memory Parallel (MPI)
-please select 0 for the second option is no nesting
./compile em_real
ls -ls main/*.exe
-if you built a real-data case, you should see ndown.exe, real.exe, and wrf.exe
- HYPERLINK "http://www.mmm.ucar.edu/wrf/users/download/get_source
.html" http://www.mmm.ucar.edu/wrf/users/download/get_source.html
-please download WRF model source code from HYPERLINK "http://www.mmm.ucar.edu/wrf/users/download/get_source.html" http://www.mmm.ucar.edu/wrf/users/download/get_source.html and the WRFNL patch from XXX.
+you should see wrfplus.exe
+
Running Observation Preprocessor (OBSPROC)
The OBSPROC program reads observations in LITTLE_R format (a legendary ASCII format, in use since MM5 era). Please refer to the documentation at HYPERLINK "http://www.mmm.ucar.edu/mm5/mm5v3/data/how_to_get_rawdata.html" http://www.mmm.ucar.edu/mm5/mm5v3/data/how_to_get_rawdata.html for LITTLE_R format description. For your applications, you will have to prepare your own observation files. Please see HYPERLINK "http://www.mmm.ucar.edu/mm5/mm5v3/data/free_data.html" http://www.mmm.ucar.edu/mm5/mm5v3/data/free_data.html for the sources of some freely available observations and the pro
gram for converting the observations to LITTLE_R format. If!
you hav
e observations in other various format, a sample program (LITTLE_R/util/upa.f) for writing out data in LITTLE_R format can be obtained from HYPERLINK "ftp://ftp.ucar.edu/mesouser/MM5V3/V3-7-0/LITTLE_R.TAR.gz" ftp://ftp.ucar.edu/mesouser/MM5V3/V3-7-0/LITTLE_R.TAR.gz
The basic operations performed by OBSPROC are:
@@ -148,7 +158,7 @@
Plot the distribution of each observation type.
The OBSPROC program3dvar_obs.exe should be found under the directory WRFDA/var/obsproc/src if compile all_wrfvar was completed successfully.
a. Prepare observational data for 3D-Var
-To prepare the observation file, say, at the analysis time 0h for 3D-Var, the general way is to process all observations between 1h (or 1.5h), as described in following figure, which means that the observations between 23h and 1h are treated as the observations at 0h.
+To prepare the observation file, say, at the analysis time 0h for 3D-Var, all the observations between 1h (or 1.5h) will be processed, as illustrated in following figure, which means that the observations between 23h and 1h are treated as the observations at 0h.
@@ -728,10 +738,10 @@
-WRF-ARW V3: Users Guide 6- PAGE 48
+WRF-ARW V3: Users Guide 6- PAGE 10
-WRF-ARW V3: Users Guide 6- PAGE 7
+WRF-ARW V3: Users Guide 6- PAGE 11
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