wavespectra.read_era5

wavespectra.read_era5(filename_or_fileglob, chunks={}, f0=0.03453, df=1.1, as_site=False)

Read Spectra from ECMWF ERA5 netCDF format.

Parameters:

• filename_or_fileglob (-) – filename, fileglob specifying multiple files, or filelike object to read.

• chunks (-) – chunk sizes for dimensions in dataset. By default dataset is loaded using single chunk for all dimensions (see xr.open_mfdataset documentation).

• f0 (-) – First frequency value in Hz (e.g., 0.03453)

• df (-) – Multiplicative increment between frequencies.

• as_site (-) – If True locations are defined by 1D site dimension.

Returns:

spectra dataset object read from netcdf file.

Return type:

• dset (SpecDataset)

Note

• This reader also supports ECMWF spectra from the operational forecast.

• Documentation describing how to construct the spectral grid can be found at https://www.ecmwf.int/en/forecasts/documentation-and-support/2d-wave-spectra.

• If file is large to fit in memory, consider specifying chunks for ‘time’ and/or ‘latitude/longitude’ dims.