Functionality
The PCP-Combine tool is used (if needed) to sum, add, or subtract accumulated precipitation from one or more gridded data files into a single NetCDF file containing the desired accumulation period. Its NetCDF output may be used as input to the MET statistics tools. It may be run to sum the same accumulation interval across multiple files, to add data from one or more files, or to subtract data from exactly two files. The sum, add, and subtract options may be run on any gridded data file supported by MET. The input files being combined must have already been placed on the grid on which the user would like to verify. The copygb and wgrib2 utilities are recommended for re-gridding GRIB1 and GRIB2 files, respectively. In addition, the PCP-Combine tool will only sum model files with the same initialization time unless it is told to ignore the initialization time.
PCP-Combine Usage
View the usage statement for PCP-Combine by simply typing the following:
Use the -sum, -add, -subtract, or -derive command line option to indicate the operation to be performed. Each operation has its own set of required arguments.
By default, PCP-Combine searches for records containing GRIB code 61 (accumulated precipitation). Use the -config config_str option to override this default and process other fields.
