advanced

PCP-Combine Tool: General

PCP-Combine Functionality

The PCP-Combine tool is used (if needed) to add, subtract, or sum accumulated precipitation from several GRIB files into a single NetCDF file containing the desired accumulation period. It's NetCDF output is used as input to MODE and Grid-Stat. PCP-Combine may be used to sum any grib code you like by using the -gc command line option. The GRIB files being combined must have already been placed on the grid on which the user would like to verify. The copygb utility is recommended for re-gridding GRIB files. In addition, the PCP-Combine tool will only sum model files with the same initialization time unless it is indicated to ignore the initialization time.

PCP-Combine Usage

View the usage statement for PCP-Combine by simple typing the following:

bin/pcp_combine

Use the -sum, -add, or -subtract command line option to indicate the operation to be performed. Each operation has its own set of required arguments.