> GenCast is trained on 40 years of best-estimate analysis from 1979 to 2018, taken from the publicly available ERA5 (fifth generation ECMWF reanalysis) reanalysis dataset
They say they trained on era5 data. That is modeled data not only direct observations. They do it this way to have a complete global data set that is consistent in time and space.
> GenCast is trained on 40 years of best-estimate analysis from 1979 to 2018, taken from the publicly available ERA5 (fifth generation ECMWF reanalysis) reanalysis dataset
https://www.nature.com/articles/s41586-024-08252-9
They say they trained on era5 data. That is modeled data not only direct observations. They do it this way to have a complete global data set that is consistent in time and space.
https://cds.climate.copernicus.eu/datasets/reanalysis-era5-s...