Request to Implement 22 km Meso Eta with new 3D-Var with direct use of satellite radiances
G O A L S
Increased Resolution
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Current 32 km domain and the expanded 22 km domain
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Increased resolution (22 km / 50 layers) improves prediction of 25 January blizzard
Increased resolution (22 km / 50 layers) impact on QPF for 25 January blizzard
Model Changes
Vertical advection of cloud reduces area of light rain over eastern Pacific
Reduced diffusion improves prediction of 25 January blizzard
Reduced diffusion impact on QPF for 25 January blizzard
Changes to 3D-Var
RAOB (solid) vs 3D-Var analysis (dashed)
RAOB (solid) vs new 3D-Var (dashed)
Analysis differences due to NLQC
48 km QPF results of use of radiances 5 May through 14 August
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Script Transfer and Runtime Constraint
Runtime Constraint
Completion Times&Reliability
Products & Logistics
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Alaska Cyclone Case
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3D-Var Parameter Tuning
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NCEP’s PROPOSAL
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Author: Geoff DiMego
E-mail: geoff.dimego@noaa.gov
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