Convert GRIB file(s) to netCDF format.
The only supported geometries for this feature are regular lat/lon grid or regular Gaussian (the key "
typeOfGrid" should be "
regular_ll" or "
If you are retrieving the data from our archive, check the following article for more information about how to obtain it interpolated to those grids by using the "grid" keyword: grid - keyword in MARS/Dissemination request
grib_to_netcdf [options] -o output_file grib_file grib_file ...
Ignore keys. Default method,type,stream,refdate,hdate
Split according to keys. Default param,expver
Reference date in the format YYYYMMDD. Default value 19000101.
Type of data. Possible values NC_BYTE, NC_SHORT, NC_INT, NC_FLOAT, NC_DOUBLE.
Don't use time of validity.
Force. Force the execution not to fail on error.
The name of the netCDF output file.
Multi-field support off. Turn off support for multiple fields in single GRIB message.
Specifies the kind of file to be created. Possible values are:
1 -> netCDF classic file format
2 -> netCDF 64 bit classic file format (Default)
3 -> netCDF-4 file format
4 -> netCDF-4 classic model file format
Deflate data (compression level). Only for netCDF-4 output format. Possible values [0,9]. Default None. Chunking strategy based on GRIB message.
Shuffle data before deflation compression.
Set dimension to be an unlimited dimension.
Produce a NetCDF file from GRIB edition 1
If your grib file has analysis and 6-hour forecast, then ignore keys 'type' and 'step'. Thus type=an/fc and step=00/06 will not be considered as netCDF dimensions.
Do not use time of validity. If time of validity is used, it means the 1D time coordinate is considered as date+time+step, otherwise 3 different dimensions are created. The default behaviour is to use the time of validity.
Produce netCDF with data type of FLOAT (32bit floating-point, for higher precision). Note these types were chosen to provide a reasonably wide range of trade-offs between data precision and number of bits required for each value
Set the netCDF dimension 'time' to be unlimited i.e. time can have unlimited length so variables using this dimension can grow along this dimension.