operational forecasting wave models. wavewatch iii (tolman 1997, 1999a) model description: – third...
TRANSCRIPT
![Page 1: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/1.jpg)
Operational Forecasting Wave ModelsOperational Forecasting Wave Models
![Page 2: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/2.jpg)
WaveWatch III (Tolman 1997, 1999a)
• Model description:– Third generation wave model developed at NOAA/NCEP.– Solves the spectral action density balance equation for wavenumber-
direction spectra.
• Physical features:– The governing equations include :
o refraction.o mean current (tides, surges etc.), when applicable.
– Parameterizations of physical processes (source terms) include:o wave growth and decay due to the actions of wind.o nonlinear resonant interactions.o dissipation (`whitecapping').o bottom friction.o Wave propagation is considered to be linear. And nonlinear effects
are included in the source terms (physics).o The model is prepared for data assimilation.
![Page 3: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/3.jpg)
WaveWatch III
• Output options:– Mean wave parameters:
Significant wave height
Wave Direction
Frequencies
Wave period, etc.
– Output of wave spectra at selected locations.
– Output of wave spectra along arbitrary tracks.
– Up to 9 restart files per model run.
– Files with boundary data for up to 9 separate nested runs.
– The model provides binary or ASCII output, as well as output for the GrADS graphics package by means of post processing.
![Page 4: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/4.jpg)
Domains
• 3 Domains considered:– North Atlantic Ocean (0.5ºx0.5º)– Iberian Peninsula (0.25ºx0.25º)– Portuguese Coast (0.05ºx0.05º)
• 7 days forecast – On a daily basis, updated around 7
a.m. GMT
![Page 5: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/5.jpg)
Swan
• SWAN model is a third-generation wave model for the simulation of waves in waters of deep, intermediate and finite depth.
• It is based on the discrete spectral action balance equation.
• SWAN simulates the following physical phenomena:– Wave propagation in time and space, shoaling, refraction due to current
and depth, frequency shifting due to currents and nonstationary depth. – Wave generation by wind. – Nonlinear wave-wave interactions. – Whitecapping, bottom friction, and depth-induced breaking.
• It is also suitable for use as a wave hindcast model.
![Page 6: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/6.jpg)
Swan
• Output options:– Mean wave parameters:
Significant wave height
Wave Direction
Frequencies
Wave period
Wave stress
Wave length
– Output of wave spectra 1D and 2D.
– Files with boundary data for nested runs.
![Page 7: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/7.jpg)
Domains
• 4 Domains considered:– Central Portugal (1 Km resolution)– Tejo, Sado e Sines (50 meters resolution)
• 3 Day forecast on a daily basis.
![Page 8: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/8.jpg)
Input Input (Wind)
• Wavewatch 3
• GFS wind forcing with a resolution of 0.5º
• Swan
• MM5 wind forcing with a resolution of 9 Km
![Page 9: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/9.jpg)
InputInput
MM5 with 27 km resolution. MM5 with 9 km resolution.
![Page 10: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/10.jpg)
InputInput
GFS Winds.
![Page 11: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/11.jpg)
Results Results (Wavewatch3)
![Page 12: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/12.jpg)
Results Results (Wavewatch3)
![Page 13: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/13.jpg)
Results Results (Wavewatch3)
![Page 14: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/14.jpg)
Results Results (Swan)
![Page 15: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/15.jpg)
Results Results (Swan)
![Page 16: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/16.jpg)
Results Results (Swan)
![Page 17: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/17.jpg)
Validation Validation (Wavewatch 3 Mean Wave Parameters)
![Page 18: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/18.jpg)
Validation Validation (Wavewatch 3 Mean Wave Parameters)
![Page 19: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/19.jpg)
![Page 20: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/20.jpg)
![Page 21: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/21.jpg)
![Page 22: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/22.jpg)
![Page 23: Operational Forecasting Wave Models. WaveWatch III (Tolman 1997, 1999a) Model description: – Third generation wave model developed at NOAA/NCEP. – Solves](https://reader036.vdocument.in/reader036/viewer/2022081519/56649c905503460f9494975e/html5/thumbnails/23.jpg)