Please note that numbering/ordering does not imply priority. Recent updates are shown in green. Greyed out means no longer current, but these issues can be relevant when examining archived forecasts.
Any enquiries related to the content of this page should be raised via the ECMWF Support Portal (mentioning the "Known AIFS ENS forecasting issues page").
Topic / title | Description | Related activities / comments |
|---|---|---|
General issues | ||
| G1. Artefacts at long lead times | Beyond 10 days, unphysical artefacts can emerge in the model, particularly under areas of high elevation. These are particularly visible for mean sea level pressure and temperature at 1000hPa.
| Investigations are underway to understand and fix this issue in future cycles. |
| G2. Overdispersion | On average, ensemble standard deviation is larger than RMSE of ensemble mean for a range of variables
| IFS-ENS and AIFS-CRPS share the same initial condition perturbation amplitude. Re-scaling is under investigation. |
Mean Sea Level Pressure | ||
2m temperature | ||
Cloud | ||
| C1. Reduced spatial resolution in cloud fields | Cloud fields display features at a lower spatial resolution than many of the other fields predicted by the AIFS ENS. Features have a resolution closer to the 1-degree resolution of the model processor grid.
| Investigations are underway to understand and fix this issue in future cycles. |
