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Published byKristen Mosely Modified over 9 years ago
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Summary of Progress with POAMA/ACCESS Seasonal Prediction System
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POAMA/ACCESS - Seasonal Prediction System 200820072010 POAMA-2 POAMA-1.5 POAMA-3 2009 Hind-casts 2011 Operational Products & docs Applications System Re-analyses Hind-casts Operational Products and doc Applications System Development Re-analyses Hind-casts Operational Products & Doc Applications
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Major improvements POAMA-1.5 New ACCESS atmosphere/land initialisation (ALI) system Comprehensive hind-cast set (1980-2006, 10 member ensemble each month) - 3 members done Rainfall forecasts (direct + statistical downscaling) Intra-seasonal (weekly) forecasts OpenDAP external data server (sample - last 3 years available) POAMA-2 New ACCESS Ocean assimilation system (PEODAS) New ACCESS ensemble generation strategy Increased atmospheric resolution (T95 - optional) POAMA-3 New ACCESS coupled model (UKMO UM, AusCOM,..) Higher resolution (ocean, atmosphere) Greenhouse gases New ACCESS coupled assimilation system
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Results POAMA-1.5B So far 3 out of 10 member ensemble each month from 1980-2005 Real-time forecasts in next 2 months (Some results from preliminary version 1.5A, with no ALI) Summary of work of many from BMRC
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P15b P15a P1 Persistence P15b P15a P1 Persistence Produced by Guomin Wang NINO 3 SSTA forecasts
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P15b P15a P1 Persistence Indian Ocean Dipole Model Index Produced by Guomin Wang
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POAMA15B 1982-2005 3 members mean Skill at lead=5 Dashed: persistence Produced by Guomin Wang
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SST Anomaly Correlation POAMA-1POAMA-1.5 1 month 3 month 5 month Produced by Guomin Wang
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MAM forecasts Winner POAMA Loser SVD Rainfall Forecasts (POAMA-1.5A) Produced by Eun-Pa Lim and Harry Hendon
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SON Forecasts Winner Bridging (EOF/NINO4) Loser SVD-calib Produced by Eun-Pa Lim and Harry Hendon Rainfall Forecasts (POAMA-1.5A)
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1997 OBS 2002 SST anomaly predicted by POAMA 1.5a at LT3 1997 2002 1997 vs 2002 SST forecasts Produced by Eun-Pa Lim and Harry Hendon
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1997 2002 1997 vs 2002 Rainfall forecasts Obs Forecast - Lead 3 Produced by Eun-Pa Lim and Harry Hendon
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Intra-Seasonal Forecasts Initialised with true state of ocean, land and atmosphere Stored daily data Can start looking at weekly time scales Gap between NWP and Seasonal prediction
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Skill over Australia as a function of lead time (days): precipitation (by Debbie Hudson) (1980-2001) KEY: persistence p15a p15b 0.5
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Wheeler MJO Phase Diagram Forecasts starting 1st March 1997 50 day forecasts Light Blue - obs Other colours - ensembles Produced by Harun Rashid
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Summary Significant improvement in SST skill levels Rainfall competitive with statistical forecasts ? Range of new products Seasonal and Weekly forecast Comprehensive hind-cast set available soon Available externally - openDAP server Exiting year ahead !!
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