us west coast modeling: coupled bio-physical hycom ‘nested ‘ within pacific hycom
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US West Coast Modeling: Coupled Bio-Physical HYCOM ‘nested ‘ within Pacific HYCOM. John Kindle Igor Shulman, Sergio deRada, Brad Penta Coupled Processes Section Oceanography Division Naval Research Laboratory. HYCOM West Coast Modeling. - PowerPoint PPT PresentationTRANSCRIPT
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US West Coast Modeling: Coupled Bio-Physical HYCOM ‘nested ‘
within Pacific HYCOM
John Kindle Igor Shulman, Sergio deRada, Brad Penta
Coupled Processes Section
Oceanography Division
Naval Research Laboratory
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HYCOM West Coast Modeling
• Utilize Boundary values from Pacific Basin HYCOM Run ( Metzger)
• Focus on period 1999-2002 +– Parallels NRL effort with NCOM– Uses High Resolution COAMPS Reanalysis Forcing
• NRL Monterey/ Air-Sea Coupling project
• Leverage results from– NRL CoNESTS: West Coast HYCOM– PARADIGM NOPP: Ecosystem Model – NRL CoBIOPP: NCOM coupled physical-bio-optical– NRL Coupled Air-Sea in Coastal Zone: COAMPS– Collaborations( HYCOM modeling, Field Programs,++)
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1/12° Pacific HYCOM Basin-scale Circulation SSH Snapshot – 21 March
Forced with high frequency climatological ECMWF winds and thermal forcing
WEST COAST HYOM
HYCOM
3-4 Km
Resolution
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PhysicalModel
Nitrate[NO3]
Advection& Mixing
SmallPhytoplankton
[P1]NO3
Uptake
Micro-Zooplankton
[Z1]
Grazing
Ammonium[NH4]
Excretion
NH4
Uptake
Detritus-N[DN]
FecalPellet
Sinking
Silicate[Si(OH)4]
Diatoms[P2]
SiUptake
N-Uptake
Meso-Zooplankton
[Z2]
Sinking
Detritus-Si[DSi]
GrazingFecalPellet
Sinking
Predation
Lost
Total CO2
[TCO2]
BiologicalUptake
Air-Sea Exchange
Physical-Biogeochemical Model: Fei Chai
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Global Navy Coastal Ocean Model (NCOM)
1/8th degree resolution; 40 levels( hyb)
Remotely forced signal : Originates in tropics; Requires accurate nesting between global and regional model to separate from local forcing.
Observed: Enfield and Allen (1980)
60 Day Smoothing
Remote versus Local Forcing
30N
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Black: Observed
Global NCOM
Regional NCOM
CoBALT: Remote versus Local Forcing
Tide gauges used to help evaluate model response
Regional Model accurately represents remotely forced signal as provided by Global NCOM
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Model Evaluation
Chlorophyll from SeaSoar
Survey
Aug. 8, 2001
COAST CoOP Program
Courtesy: Jack Barth
OSU
NCOM Coupled bio-physical model.
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Model Chlorophyl Aug. 7-9, 200l
Forcing: COAMPS Model Stresses
Courtesy
Jack Barth
COAST CoOP Program
OSU
Local + Remote
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Vertical Advection Problem: Silicate Gradient
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Silicate
Temperature
Smoothed
Bathymetry
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NRL Test Region: US West Coast: 1/120 West Coast Model nested within Global NCOM( 1/8th deg.) ( Regional Model; 1/24th deg by 9/03)
www7320.nrlssc.navy.mil/cobiopp
WEST COAST NCOM10-APR-2000