Utility: p_interp

This utility interpolates WRF-ARW netCDF output files to user specified pressure levels.
This is still a beta test version - March 2008

Obtain the utility from the WRF Download page (you must be a registered user to download any code - it is free)
 

Compile

The code should run on any machine with a netCDF library.

To compile the code, use the compile flags at the top of the utility.
e.g., for a LINUX  machine you need to type:

pgf90 p_interp.F90  -L/usr/local/netcdf/lib -lnetcdf  -lm 
    -I/usr/local/netcdf/include -Mfree  -o p_interp

If successful, this will create the executable: p_interp
 

Run

Edit the associated namelist.pinterp file (see namelist options below), and run

./p_interp

&io
input_root_name	Path and file name(s) of wrfout files. Use wild character if more than one file is processed. Output will be written to input_root_name_PLEV.
process	Indicate which fields to process. ‘all’ fields in wrfout file (diagnostics PRES, TT & GEOPT will automatically be calculated); ‘list’ of fields as indicated in ‘fields’
fields	List of fields to process.
debug	Switch debug more on/off.
-64bit	Allow large files (> 2GB) to be read / write.
&interp_in
interp_levels	List of pressure levels to interpolate data to
extrapolate	0 - set values below ground and above model top to missing values (default) 1 - extrapolate below ground, and set above model top to model top values
interp_method	1 - linear in p interpolation (default) 2 - linear in log p interpolation
unstagger_grid	Set to .True. so unstagger the data on output