OPEN DATA

NOAA Wave Watch III (NWW3) Ocean Wave Model

NOAA

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SUMMARY

Publisher

NOAA

Source

Forecast

Abstract

WAVEWATCH III® (Tolman 1997, 1999a, 2009) is a third generation wave model developed at NOAA/NCEP in the spirit of the WAM model (WAMDIG 1988, Komen et al. 1994). It is a further development of the model WAVEWATCH, as developed at Delft University of Technology (Tolman 1989, 1991a) and WAVEWATCH II, developed at NASA, Goddard Space Flight Center (e.g., Tolman 1992). WAVEWATCH III®, however, differs from its predecessors in many important points such as the governing equations, the model structure, the numerical methods and the physical parameterizations.
Furthermore, with model version 3.14, WAVEWATCH III® is evolving from a wave model into a wave modeling framework, which allows for easy development of additional physical and numerical approaches to wave modeling.
WAVEWATCH III® solves the random phase spectral action density balance equation for wavenumber-direction spectra. The implicit assumption of this equation is that properties of medium (water depth and current) as well as the wave field itself vary on time and space scales that are much larger than the variation scales of a single wave. With version 3.14 some source term options for extremely shallow water (surf zone) have been included, as well as wetting and drying of grid points. Whereas the surf-zone physics implemented so far are still fairly rudimentary, it does imply that the wave model can now be applied to arbitrary shallow water.
The latest version of WAVEWATCH III® is 4.18, released on 19 March 2014. Source code access can be requested under the Source Code Distribution tab on this page. The manual (pdf) can be viewed here.
We are also releasing a new version of our grid generating software gridgenv2.0. This updated software can now generate bathymetry, mask and obstruction grids for rectilinear as well as curvilinear grids. To make the functions generic significant changes have been made to the function calls.
A portable package of scripts and Fortran code are provided to perform genetic optimization of the free parameters of the Generalized Multiple DIA in WAVEWATCH III. The package has been designed to work with v4.18 [More...]

Description

We have made an example, where we use ww3 data from our Datahub to compare it with different model datasets we have, go and get it from our GitHub: https://github.com/planet-os/notebooks/blob/master/api-examples/model-comparisons.ipynb/n We also have an example where we compare NOAA Wave Watch 3 and NDBC Buoy data https://github.com/planet-os/notebooks/blob/master/api-examples/ndbc-wavewatch-iii.ipynb /n and here is the example of plotting ww3 data: https://github.com/planet-os/notebooks/blob/master/api-examples/wavewatch-iii-global-api.ipynb

Refreshed

Jan 21, 2021 at 05:15 UTC 3 hours ago

Update Frequency

6 hours

Product Type

Forecast

Feature Type

GRID

Spatial Reference System

WGS84

Temporal Resolution

3 hours

Spatial Resolution

1 degree

EXTENT

Vertical

Ocean surface

Start Date

Oct 23, 2020 at 00:00 UTC

End Date

Jan 28, 2021 at 12:00 UTC

DISTRIBUTION

Distribution Format(s)

NetCDF4

Online Resource(s)

ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/wave/prod/

VARIABLES (15)

Vocabulary (version) CF 28.0

Variable

Long name

Unit

API Query

Wind_speed_surface

Wind speed @ Ground or water surface

m/s

NOAA Wave Watch III (NWW3) Ocean Wave Model

No data available

No data available

SUMMARY

EXTENT

DISTRIBUTION

VARIABLES (15)

DIMENSIONS (5)

LICENSE