Global

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Global Basin ScaleOcean Modeling at
theNaval Oceanographic Office

• Frank L Bub
• MAST Workshop
• 28 November 2006

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NAVOCEANO Global Models - Applications

• Anti-submarine Warfare (ASW)
• Water temperature, salinity, sound speed,
  currents, surface waves, internal waves, fronts
  and eddies
• Deep water to coastal regions
• Mine warfare
• Currents, mine drift, depth (tides), density,
  waves
• Continental shelf, navigation channels
• Ocean transit and staging
• Currents, waves
• Deep water

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NAVOCEANO Global Models -Considerations

• Data
• Satellite - temperature, altimetry, color, waves
• In situ - ARGO, ship CTDs, XBTs, surface
  observations
• Drifters, fixed buoys, tidal stations
• Ice coverage and character
• Assimilation validation
• Forcing
• Bathymetry
• Atmosphere - wind stress, heat fluxes (long,
  short wave)
• Timeliness
• Strategic planning to tactical decision-making
• Daily updates
• 2-5 day forecasts
• In time for morning brief
• Accuracy
• Uncertainty products

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NAVOCEANO Global Models - Products

• Web services
• Feed to tactical decision aids
• Content
• Graphic
• Data fields
• Interpretation value added

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Ocean Models at NAVOCEANO

• Global Circulation Models
• NLOM
• G-NCOM
• HYCOM
• 3-D Coastal Circ Models
• SWAFS
• Regional-NCOM
• EAS / IAS / USWC
• Relocatable NCOM
• Vertical Profile (T,S) Model
• MODAS

• 2-D Coastal Circ Models
• PC-Tides
• WQMAP
• HydroMap
• RMA-2
• ADCIRC
• Wave Models
• WAM
• SWAN
• Navy Std Surf Model
• Delft3D SWAN/FLOW

3D Capability also

• FNMOC Global Atmospheric Model
• NOGAPS
• Regional to Local
• COAMPS

BLUE - GLOBAL GOLD - COASTAL
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GLOBAL NAVY COASTAL OCEAN MODEL G-NCOM
GLOBAL NAVY COASTAL OCEAN MODEL G-NCOM

• POM-based
• 3D Forecasts of Temperature, Salinity,
  Currents, Elevation
• Resolution 1/8 deg
• 42 vertical layers
• Forecast to 72hr _at_ 3hr increments
• NOGAPS atmosphere forcing
• Assimilates SSTemp / SSHeight
• Will assimilate profiles 2007 (NCODA)
• Deep water mesoscale processes
• Tides from OSU (Egbert) model
• Lateral boundary conditions for higher resolution
  nests (SWAFS / regional NCOM)

1/8 deg (10 km / 5 nm)
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FNMOC NOGAPS
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HYBRID COORDINATE OCEAN MODELHYCOM

• Next generation dynamic model
• NOPP Consortium NRL lead, U Miami, Los Alamos,
  French, NOAA/AOML, etc.
• Temperature, Salinity, Currents, Elevation
• Initial global resolution 1/12 deg (2008)
• Final resolution 1/24 deg (2011)
• 40 vertical layers
• Pressure, depth, sigma coordinates as needed
• Forecast to 120hr
• Assimilates SST / SSH / profile data using NCODA
• Global regional model replacements
• Global service
• ESMF backbone

? 1/24 deg (3.8 km / 1.8 nm)
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SHALLOW WATER ANALYSIS FORECAST SYSTEM - SWAFS

• POM-based
• 3D Forecasts
• T, S, Currents, Elevation
• Resolution varies by region (1/50 to 1/4 deg)
• 27 to 47 vertical layers
• Forecast to 48hr _at_ 1hr increments
• Assimilates data from
• Satellites (SST, SSH)
• insitu obs (XBTs, CTDs, floats, buoys)
• IHO tides

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GNCOM and SWAFS Surface Currents over
TemperatureRuns 00Z 12NOV06
GNCOM
SWAFS
GNCOM 1/8 deg SWAFS 1/50 deg.
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Rapidly Relocatable NCOM RD Transition (2007)

• Rapid Nesting Process within Global NCOM
• Same NCOM algorithms
• Profile Assimilation via NCODA
• Focus on Sound Speed Field
• Set up by oceanographer vice numerical modeler
• Initial Delivery FY07.

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WAVE MODEL WAM

• Portable - easily relocated
• Variable resolution (1/4º to 1/12º)
• Forecast to 72 hours (2x daily)
• Forced by FNMOC model winds
• Deep water ( ? 20 m )
• Gridded set of wave parameters
• Significant wave height direction
• Sea swell wave height, direction, period
• Wave energy spectra by direction period
• Replace with FNMOC WW3 BCs

Hurricane IVAN 16 SEPT 2004
gt 40 ft
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Plans Requirements

• Transitions
• Baroclinic ADCIRC
• Delft 3D
• HYCOM
• RD needs
• Assimilation
• Uncertainty
• Surface processes - mixed layer
• Data presentation / formats / storage /compaction
• Nearshore bathymetry
• Tactical assessment tools