A coupled discrete wave model MRI-II

Uji, Takeshi

doi:10.1007/bf02302523

Cited by 10 publications

(2 citation statements)

References 9 publications

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“…In deriving the above form of G, the empirical fetch graph formulas by Wilson (1965) and laboratory tank data by Toba (1961;tabulated in Toba, 1972) were used again together with the similarity law (1). Equation ( 4), which expresses the evolution of the local equilibrium toward a steady state of the fully developed sea, has been utilized as the basic equation for the wind-wave growth and used in wave prediction models (e.g., Toba et aI., 1985a,b andUji, 1984). Since these semi-empirical relationships were proposed, various experimental observations have been made in relation to the strongly nonlinear wind-wave processes.…”

Section: Introductionmentioning

confidence: 99%

Similarity laws of the wind wave and the coupling process of the air and water turbulent boundary layers

Toba¹

1988

Fluid Dyn. Res.

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The statistical properties of growing wind waves are known to obey certain self-similarity laws. One of these is expressed as the ~-power law relation between the significant wave-height and the significant wave period in nondimensional forms. Recent experiments on turbulence above and below laboratory wind waves indicate that both the air and the water layers have a structure which is similar to that of tbe turbulent boundary layer over a rough solid wall. The continuity of the momentum flux through the air and water boundary layers combined with the ~-power law of wind waves means that all the characteristic velocities related to the air-water boundary process are proportional to one another. Our laboratory experimental data on the several characteristic variables concerned support this picture. The state of local equilibrium as expressed by the; -power law is thought to be brought about by the" breaking adjustment of the wind wave" which is required by the overall continuity of the velocity and the momentum flux across a thin surface layer. The above proportionality of the characteristic velocities provides a physical basis for the observed friction velocity scaling of the ocean mixed layer.values of ft, the nondimensional wave height If = gH I / 3 / UI~) and the nondimensional period

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Section: Introductionmentioning

confidence: 99%

Similarity laws of the wind wave and the coupling process of the air and water turbulent boundary layers

Toba¹

1988

Fluid Dyn. Res.

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“…The significant wave heights and periods were estimated by the zeroup-cross method [e.g., Goda, 2000] based on 20 min of observation (4800 samples) of surface displacements. The wave analysis data at 26°N, 128°E at 24-hour intervals (every 9 Japan Standard Time) was supplied by the Japan Meteorological Agency [1996] and predicted by them using the numerical wave model presented by Uji [1984] and adopted for wave prediction by the JMA in 1995. Surface wind data taken at 10-min intervals at the location Itokazu (I in Figure 1, 26°09 0 N, 127°46 0 E, elevation: 186 m) were also supplied by the JMA.…”

Section: Other Datamentioning

confidence: 99%

Ocean wave directional spectra estimation from an HF ocean radar with a single antenna array: Observation

Hisaki¹

2005

J. Geophys. Res.

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[1] A method of estimating ocean wave directional spectra using a]high-frequency (HF) radar with a single antenna array was applied to actual ocean data. This method incorporates the wave energy balance equation and the continuity equation of wind vectors into the inversion method to solve the integral equation which relates a Doppler spectrum to wave spectra. This method uses dynamic extrapolation to estimate wave spectra at positions where the signal-to-noise (SN) ratio in Doppler spectra is not high. The agreement of wave heights with in situ observation is good. Additionally, there is a correlation between radar-estimated sea surface winds and winds near the HF radar observation area. The method under consideration was found to be able to estimate wave directional spectra in swell conditions.Citation: Hisaki, Y. (2005), Ocean wave directional spectra estimation from an HF ocean radar with a single antenna array: Observation,

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Wave Analysis: Operations and Applications

Khandekar¹

1989

Operational Analysis and Prediction of Ocean Wind Waves

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A coupled discrete wave model MRI-II

Cited by 10 publications

References 9 publications

Similarity laws of the wind wave and the coupling process of the air and water turbulent boundary layers

Similarity laws of the wind wave and the coupling process of the air and water turbulent boundary layers

Ocean wave directional spectra estimation from an HF ocean radar with a single antenna array: Observation

Wave Analysis: Operations and Applications

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