south atlantic bight thayer school of engineering limited ...quoddy) m•rnigete f ooic-er atasfl...
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19 Aug, 2003, HYCOMWashington, DC
South Atlantic Bight Limited Area Model
Brian Blanton, Cisco Werner, Harvey SeimDan Lynch
a consumer of IC’s/BC’s from HYCOM
Thayer School of EngineeringDartmouth College
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19 Aug, 2003, HYCOMWashington, DC
UNC’s South Atlantic Bight Limited Area Model
NCEP Eta 12km
Remote BC’sADCIRC, HYCOM
Limited Area ModelData Assimilation Loop(Quoddy/Casco FEM)
Gather OBSADCP, Pressure,
CODAR Web PublishNOWCASTFORECAST
Initialization•Climatology
•HYCOM/GODAE
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19 Aug, 2003, HYCOMWashington, DC
Limited Area Model
• High-res finite element, Baroclinic (Quoddy)
• Assimilation of Vbar, water level (adjoint of Quoddy)
• Real-time forecasting of coastal ocean state
• Need IC’s and OBC’s for T,S and “Remote” water level for Limited area region
Coastal Detail
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19 Aug, 2003, HYCOMWashington, DC
SABLAM Observations
East Coast Domain for Tidal/Wind-Driven BCs for Limited-Area Mesh
Nested SABLAM Mesh for Hindcast/Forecast System
Obs. Locations:
Water Level
ADCP
NC
SC
GA
FL
3000m
1000m
200m
50m
25m
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19 Aug, 2003, HYCOMWashington, DC
SABLAM Operational Example•10-13 Dec 2002•Strong Southward Winds•Assim of WL from Ft. PL, St Sim•Assim of Vbar from R2, R6
Prior Posterior
•Post-Prior•Weak poleward flow missing in Prior•Cross-shelf slope•Is this the G.S.?•Can Hycom Compensate
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19 Aug, 2003, HYCOMWashington, DC
HYCOM Transects
Blake Plateau
29N
31N
33N
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19 Aug, 2003, HYCOMWashington, DC
“Coupling” to HYCOM in SAB
• Technical/Procedural Questions:– Mapping HYCOM TS to regional
grids; very different scales– Vertical grid, particularly @
shelfbreak– Frequency of HYCOM nowcasts– Impact on assimilation system
• Scientific Questions:– Low-freq sealevel variability as
related to GS transport, a la Blaha, Sturges, e.g.
– Mid-shelf TS comparisons to SABSOON towers
– Charleston Bump Dynamics Deflection atCharlestonBump
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19 Aug, 2003, HYCOMWashington, DC
THE END
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19 Aug, 2003, HYCOMWashington, DC
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19 Aug, 2003, HYCOMWashington, DC
HYCOM Mixed Layer Temp, UVbar
Deflection atCharlestonBump
SABLAMFEM Boundary
10 Feb ‘03
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19 Aug, 2003, HYCOMWashington, DC
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19 Aug, 2003, HYCOMWashington, DC
ADCPWaterLevel