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| Before downloading data check if your software application supports the GRIB and/or NetCDF formats . If it supports both, use GRIB. |
The GRIB file format is designed for storing and distributing weather data. GRIB files are is widely used in meteorological applications (Wikipedia article). GRIB files usually have the extension .grb or .gb.
The NetCDF file format is a more generic format, commonly used to store and distribute scientific data (Wikipedia article). NetCDF files usually have the extension .nc.
For example, ERA Interim, the main dataset in the Copernicus Climate Change Service (C3S), is produced by ECMWF in the GRIB edition 2 format. The data is then made available for download in its native GRIB format, and also in a version converted from GRIB to NetCDF. Note that due to limitations of the NetCDF specifications the The native storage and download format for all ECMWF data is the GRIB format. Alternatively you can download data in the NetCDF format, in this case the data is internally converted from GRIB to NetCDF before the download. Note that he NetCDF version contains fewer parameters (variables) and incomplete metadata and is not formally supported by ECMWF.
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