NWW3 implementations (Text)


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The NOAA WAVEWATCH III® operational wave model suite consists of a set of five wave models, based on version 2.22 of WAVEWATCH III®. All models use the default settings of WAVEWATCH III® unless specified differently.

All regional models obtain hourly boundary data from the global model. All models are run on the 00z, 06z, 12z and 18z model cycles, and start with a 6h hindcast to assure continuity of swell. All models provides 126 hour forecasts, with the exception of the NAH model (72 hour forecast). No wave data assimilation is performed. All models are based on shallow water physics without mean currents. Additional model information is provided in the table and bullets below. The four time steps are the global step, propagation step for longest wave, refraction step and minimum source term step.

model type coverage and resolution
(long., lat.)
Min. depth (m) Time steps (s) Additional model settings (namelist input) and comments:
NWW3 global 77°S - 77°N
1.25°x1.°
25 3600
1300
3600
300
&SBT1 GAMMA=-0.038
&MISC FLAGtr=4
CICE0=0.33
CICEN=0.67
AKW regional 45°-75°N 160°E-123°W
0.5 °x0.25°
7.5 1800
600
1800
300
&SBT1 GAMMA=-0.038
&MISC FLAGtr=4
CICE0=0.25
CICEN=0.75
WNA regional 0°-50°N 98°-30°W
0.25°
7.5 3600
900
3600
300
&SBT1 GAMMA=-0.019
&MISC FLAGtr=4
CICE0=0.25
CICEN=0.75
NAH regional 0°-50°N 98°-30°W
0.25°
7.5 3600
900
3600
300
&SBT1 GAMMA=-0.019
&PRO3 WDTHCG=2.00
WDTHTH=2.00
&MISC FLAGtr=4
CICE0=0.25
CICEN=0.75
Seasonal
ENP regional 5°-60.25°N 170°-77.5°W
0.25°
7.5 3600
700
3600
300
&SBT1 GAMMA=-0.019
&MISC FLAGtr=2
NPH regional 5°-60.25°N 170°-77.5°W
0.25°
7.5 3600
700
3600
300
&SBT1 GAMMA=-0.019
&PRO3 WDTHCG=2.00
WDTHTH=2.00
&MISC FLAGtr=2

Model input:

Model output:

Bathymetry and obstruction grids:

Model Input file Bathymetry Obstructions
NWW3 ww3_grid.inp nww3.bot nww3.obs
WNA ww3_grid.inp wna.bot wna.obs
ENP ww3_grid.inp enp.bot enp.obs
AKW ww3_grid.inp akw.bot akw.obs
NAH ww3_grid.inp wna.bot wna.obs
NPH ww3_grid.inp enp.bot enp.obs

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Page last modified: Thursday, 15-Nov-2012 18:56:50 UTC