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System Configuration Information

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

GPC Beijing

GPC Beijing
When was the current long-range forecast system implemented? December, 2005
Is it a coupled forecast system? Yes
Is it a Tier-2 forecast system? No
Atmospheric model resolution Spectral, T63L16
Ocean model (if applicable) BCC/IAP GT63L30
Source of atmospheric initial conditions NCEP Reanalysis for the period 1983 to 2004 and CMA operational
analysis from 2005 onwards.
Source of ocean initial conditions Global Ocean Data Assimilation System
If Tier-2, what is the source of SST predictions? N/A
Hindcast period 1983-2004
Ensemble size for the hindcasts 48
How is the hindcast ensemble configured?  8 atmospheric initial conditions from each of the last 8 days of the end of previous month and 6 oceanic initial conditions from a single initial state with 5 different perturbations of ocean data assimilation system.
Ensemble size for the forecast 48
How is the forecast ensemble configured? Same as the hindcast
Length of forecasts 6 months
Data format NetCDF, binary
What is the latest date predicted anomalies for the next month/season become available? 25th of the current month.
How are the forecast anomalies constructed? Departures from the model climate estimated by the hindcast integrations
URL where forecast are displayed http://bcc.cma.gov.cn/products/
Point of Contact Peiqun Zhang (zhangpq@cma.gov.cn)