US West Coast Modeling: Coupled Bio-Physical HYCOM ‘nested ‘ within Pacific HYCOM
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Transcript of 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
• 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,++)
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
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
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
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
Model Evaluation
Chlorophyll from SeaSoar
Survey
Aug. 8, 2001
COAST CoOP Program
Courtesy: Jack Barth
OSU
NCOM Coupled bio-physical model.
Model Chlorophyl Aug. 7-9, 200l
Forcing: COAMPS Model Stresses
Courtesy
Jack Barth
COAST CoOP Program
OSU
Local + Remote
Vertical Advection Problem: Silicate Gradient
Silicate
Temperature
Smoothed
Bathymetry
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