Cycle 32r3V summary of changes

Implementation date	11 March 2008
Key characteristics of our current forecasting system
Resolution	Horizontal (unchanged) Atmospheric HRES: TL799 ENS: Leg A TL399 Wave HRES: 0.25 degrees ENS: 0.5 degrees LAW: 0.1 degrees	Vertical (unchanged) Atmospheric HRES: L91 ENS: L62
Data set affected	HRES ENS
Scorecard	-
Meteorological changes	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 impacts	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 changes	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
New disseminated model output	-
Discontinued disseminated model output	-
e-suite experiment number