AGREPS – ACCESS Global and Regional EPS

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Presentation transcript:

AGREPS – ACCESS Global and Regional EPS Michael Naughton, David Smith, Asri Sulaiman CAWCR Earth System Modelling Program Slides for 2014 GIFS-TIGGE Working Group Meeting March 2014

AGREPS – ACCESS medium-range ensemble 24-member ensemble designed for medium-range forecasting Based on global component of UK Met Office MOGREPS ensemble Global ensemble to 10 days ETKF for initial condition perts Stochastic model perturbations Currently running at 60 km (N216) horizontal resolution, 70 vertical levels ACCESS-G 40km (N320) – 25km (N512) AGREPS-G 60km (N216) – 40km (N320) ACCESS-R 12 km HI-RES 4km – 1.5/2.2km The Centre for Australian Weather and Climate Research A partnership between CSIRO and the Bureau of Meteorology

AGREPS current status Research versions of AGREPS have been running since 2009 Current 60km APS1 AGREPS has been running since 2012 Verifications have shown AGREPS ensemble has comparable skill and spread to operational EPS systems at other major weather centres Operational implementation is planned for APS2 operational ACCESS NWP suite; date is yet to be set The Centre for Australian Weather and Climate Research A partnership between CSIRO and the Bureau of Meteorology

AGREPS plans Upgrade to N320 is planned, possibly in time to be included in the APS2 operational system (2015) 2.2 km resolution city/state scale limited area ensemble is planned for 2016 (APS3), based on 2.2 km UK ensemble We aim to incorporate Met Office hybrid DA approach using flow-dependent error covariances in APS3 ACCESS-G global NWP system The Centre for Australian Weather and Climate Research A partnership between CSIRO and the Bureau of Meteorology

AGREPS TIGGE plan Aim to set up to start contributing AGREPS forecasts to TIGGE archive as part of transition-to-operational system. Timing for this is still to be determined. The Centre for Australian Weather and Climate Research A partnership between CSIRO and the Bureau of Meteorology