Hi, everyone! I’m interested in subseasonal-to-seasonal (S2S) predictions and have recently been working with both the Copernicus Climate Change Service (C3S) seasonal forecast products and the S2S project outputs. I’m curious about the key differences between these two datasets.
Aside from the slight differences in model resolution, ensemble size, and forecast range (C3S provides forecasts up to 6 months, while S2S covers about 60 days), are there any notable differences in model initialization or configuration?
For example, when looking specifically at the ECMWF model used in both datasets—since they both provide daily data—can these outputs be considered directly comparable?