Hello,

Please, could anyone confirm the real ERA5 ocean wave reanalysis horizontal resolution? According to the old ERA5 data documentation:

"The ERA5 HRES (High Resolution) data has a native resolution of 0.28125 degrees (31km) [...] The wave HRES (High Resolution) data has a native resolution of 0.36 degrees [...]"

This information differs from the specified in the CDS website:

"Horizontal resolution: Reanalysis: 0.25°x0.25° (atmosphere), 0.5°x0.5° (ocean waves)"

So I'm a bit confused. I can understand the interpolation of the ERA5 HRES atmospheric fields to a regular 0.25ºx0.25º grid (0.28º is quite similar to 0.25º), but... what is the reason to interpolate the ocean wave fields to a 0.5x0.5º regular grid when theorically the real horizontal resolution is 0.36º?

Thanks in advance.
Regards,

Oriol Ciurana