...
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. Over-dispersion | 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. |
| G3. Precipitation | Small tp values can occur in very dry regions, visible for long accumulation periods
240h accumulated precipitation | Investigations are underway to understand and fix this issue in future cycles. |
Mean Sea Level Pressure | ||
2m temperature | ||
Clouds | ||
| 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. |
