File Formatting

  • The output files are written through the NetCDF API
  • The NETCDF4 _CLASSIC model will be adopted
  • Recommended compression level deflate=6
  • Shuffling=True
  • Fletcher32=True is strongly recommended

File Structure

  • Each netCDF4 file contains a single output variable (along with coordinate/grid variables, attributes and other metadata) from a single model and a single simulation (i.e., from a single ensemble member and a single start date)
  • Recommended maximum file size of 4GB

  • A file containing a hash created with sha256sum should be created for each file

    Create hash files
    sha256sum filename.nc > filename.sha256

File Naming

<institute_id>_<model_id tag>_<forecast_type>_<start date identifier>_<modeling realm>_<frequency>_<level_type>_<variable name>_<ensemble member>.nc


<model_id_tag> as it is defined in the description of the "source" global attribute
<institute_id>, <forecast_type>, <modeling_realm>, <frequency> and <level_type> coming from the global attributes of the same name

<start_date_identifier> being an string "SYYYYMMDDHH"
<variable_name> from the netCDF name of the variable (short name)
<ensemble_member> from the 'realization' coordinate value


NOTE: The file name should be able to be rebuilt from the contents of the file

Metadata