Comment by sieste

Impressive. However, I don't like how AI foundation models are always advertised as alternatives to "traditional" (physics based) forecasting. Virtually all AI weather models are trained on ERA5 reanalysis, which is a blend of observations and numerical model forecasts. Without a good global numerical model of the atmosphere there would be no AI model. I wish this synergy were emphasised more, rather than always going straight for the easy "AI beats physics!!1!" headline.