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US West Coast Modeling: Coupled Bio-Physical HYCOM ‘nested ‘ within Pacific HYCOM

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.

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US West Coast Modeling: Coupled Bio-Physical HYCOM ‘nested ‘ within Pacific HYCOM

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  1. 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

  2. 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,++)

  3. 1/12° Pacific HYCOM Basin-scale Circulation SSH Snapshot – 21 March HYCOM 3-4 Km Resolution WEST COAST HYOM Forced with high frequency climatological ECMWF winds and thermal forcing

  4. Physical-Biogeochemical Model: Fei Chai Air-Sea Exchange Small Phytoplankton [P1] Micro- Zooplankton [Z1] Biological Uptake Total CO2 [TCO2] Grazing NO3 Uptake NH4 Uptake Predation Nitrate [NO3] Excretion Meso- Zooplankton [Z2] Ammonium [NH4] Fecal Pellet Advection & Mixing N-Uptake Fecal Pellet Grazing Lost Silicate [Si(OH)4] Detritus-N [DN] Detritus-Si [DSi] Si Uptake Diatoms [P2] Physical Model Sinking Sinking Sinking

  5. Remote versus Local Forcing Remotely forced signal : Originates in tropics; Requires accurate nesting between global and regional model to separate from local forcing. Observed: Enfield and Allen (1980) Global Navy Coastal Ocean Model (NCOM) 1/8th degree resolution; 40 levels( hyb) 30N 60 Day Smoothing

  6. CoBALT: Remote versus Local Forcing Black: Observed Global NCOM Regional NCOM Tide gauges used to help evaluate model response Regional Model accurately represents remotely forced signal as provided by Global NCOM

  7. Model Evaluation Chlorophyll from SeaSoar Survey Aug. 8, 2001 COAST CoOP Program NCOM Coupled bio-physical model. Courtesy: Jack Barth OSU

  8. Model Chlorophyl Aug. 7-9, 200l Forcing: COAMPS Model Stresses Local + Remote Courtesy Jack Barth COAST CoOP Program OSU

  9. Vertical Advection Problem: Silicate Gradient

  10. Silicate Smoothed Bathymetry Temperature

  11. 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 NCOM 10-APR-2000

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