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Verifications of Global EPS for one-month prediction using its Hindcast

Hindcast Verification

• Bias map (Mean error map)
• Northern hemisphere map
• Global map
• Zonal mean map

• Hindcast maps for every initial date
• Northern hemisphere map
• Global map

• Verification score
• Time-series Circulation Index
• Verification Score Maps
• Variables to be Assessed: RAIN, Z500, T850, SLP, CHI200, PSI200, PSI850
• Diagonostic Measures:
• Anomaly Correlation(ACOR)
• Root Mean Squared Error(RMSE)

Specifications of the hindcast

• Model: JMA-GSM
• Resolution: TQ479L128 (up to 18 days) , TQ319L128 (after 18 days)
• Target period for verification: 1991-2020
• Ensemble size: 13
• Initial condition (Atmosphere): JRA-3Q
• Initial condition (Land): Land surface values estimated with the land-surface model in the Global EPS using atmospheric forcing from JRA-3Q

Verification data

• Precipitation (RAIN) : GPCP (Global Precipitation Climatology Project) precipitation dataset (version 2.3)
• Atmospheric Analysis (such as Z500 and T850): JRA-3Q