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System Configuration Information

These information can be changed if the corresponding operational model is modified.

GPC Exeter

GPC Exeter
When was the current long-range forecast system implemented? System name: GloSea5
Implemented: June 2013
Is it a coupled forecast system? Yes
Is it a Tier-2 forecast system? No
Atmospheric model resolution 0.83 lat x 0.56 long x 85 levels
Ocean model (if applicable) NEMO: 0.25 lat x 0.25 lon 75 levels
Source of atmospheric initial conditions ERA-interim for the period 1993-2015 and Met Office NWP operational analyses from 2010 to present
Source of ocean initial conditions Global Ocean Data Assimilation System (NEMOVAR)
If Tier-2, what is the source of SST predictions? N/A
Hindcast period 1993-2015
Ensemble size for the hindcasts 28 members (from 4 different start dates, see below)
How is the hindcast ensemble configured? Lagged approach, 3 member per start date on the 1st, 9th, 17th and 25th of each calendar month. All 3 member share the same initial conditions and differ only due to schemes to represent model uncertainties
Ensemble size for the forecast 42
How is the forecast ensemble configured? Lagged approach, 14 member per start date (every Monday). All 14 members share the same initial conditions and differ only due to schemes to represent model uncertainties
Length of forecasts 6 months
Data format GRIB 1
What is the latest date predicted anomalies for the next month/season become available? 13th of the month
How are the forecast anomalies constructed? Departures from the model climate estimated by the hindcast integrations
URL where forecast are displayed http://www.metoffice.gov.uk/research/climate/seasonal-to-decadal/gpc-outlooks
Point of Contact

Richard Graham (richard.graham@metoffice.gov.uk)
Peter J. McLean (peter.mclean@metoffice.gov.uk)


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