splitnc

A simple script that splits multi-field netCDF files into single-field files

Example Usage

Atmosphere

To use this script for split multi-field atmosphere files from ACCESS-ESM1.6:

python split-nc.py --shared-vars latitude_longitude  --rename-regex "(?P<newname>.*)_\\d+" $INPUT_DIR/*.nc

splitnc will automatically determine which variables are fields by looking at which variables depend on other variables. Variables with nothing depending on them are deemed to be fields. Alternatively one can use --field-vars fld_.* to match the variable names in these files.

The --rename-regex option with the supplied regex will rename variables like time_0 or pseudo_level_0 are renamed to time or pseudo_level.

The --shared-vars option will ensure that the variable latitude_longitude is included in all files even though none of the field variable depend on it.

Ice

To use this script for split multi-field ice files from ACCESS-ESM1.6:

python split-nc.py --shared-vars uarea,tmask,tarea,VGRDb,VGRDi,VGRDs $INPUT_DIR/*.nc

With ice files the shared-vars are different and there are no duplicated variables that require renaming.