Implemented: 11 March 2008
Datasets affected
- HRES
- ENS
Resolution
Unchanged
| Horizontal | Vertical |
|---|---|
Atmospheric (unchanged)
Wave (unchanged)
| Atmospheric (unchanged)
|
Meteorological content
- Use of persisted SST anomalies in all atmospheric forecasts
- Daily ocean-coupling of days 10 to 15 of 0000 UTC ENS forecasts
- Modified EFI products using the new unified re-forecasts
Meteorological impact
Previously, the sea surface temperatures were persisted from the initial conditions during both the deterministic and the medium-range ENS forecasts. With the implementation of the unified VarEPS monthly system, the sea surface temperature anomalies relative to the 1979-2001 ERA-40 daily climates are persisted. The anomalies are added to the ERA-40 daily climate to produce the full SST field.
Technical content
- Monthly Forecast run once per week from 0000 UTC on a Thursday as an extension of the 15 day ENS forecast from this base time
- New GRIB description for all Monthly Forecast products, analogous to the current medium-range ENS data
Model ID
- Atmospheric: 131
- Ocean wave: 116
- Limited-area ocean wave: 216
Contents of this page
All IFS cycles
- Terminology for IFS testing
- Implementation of IFS Cycle 48r1
- Implementation of IFS Cycle 47r3
- Implementation of IFS Cycle 47r2
- Implementation of IFS Cycle 47r1
- Implementation of IFS cycle 46r1
- Implementation of IFS cycle 45r1
- Implementation of Seasonal Forecast SEAS5
- Implementation of IFS cycle 43r3
- Implementation of IFS Cycle 43r1
- Implementation of IFS cycle 41r2
- Introducing the octahedral reduced Gaussian grid
- Horizontal resolution increase
- Boundary-Condition Programme ENS at 06 and 18 UTC
- Implementation of IFS Cycle 41r1
- IFS cycle upgrades pre 2015