Nonlinear internal waves from the Luzon Strait

Liu, Cho-Teng; Pinkel, Robert; Klymak, Jody M.; Hsu, Meng−Kai; Chen, Hsien-Wen; Villanoy, Cesar L.

doi:10.1029/2006eo420002

Cited by 44 publications

(49 citation statements)

References 6 publications

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“…7 and the wave field in Fig. 8, taken from Liu et al (2006). These waves cross the deep basin and then shoal on the continental shelf in water of depth 400-200 m, see for example the reports of the ASIAEX experiment by Duda et al (2004), and Liu et al (2004).…”

Section: Application To Internal Solitary Waves In the South China Seamentioning

confidence: 99%

“…The plots are those for the phase speed c, the dispersion coefficient δ, the quadratic coefficient µ, and the cubic coefficient µ 1 . currents in Luzon Strait, see Liu et al (2006) and Zhao and Alford (2006) for instance. The second cross-section is chosen to have a positive cubic nonlinear coefficient along the whole wave path.…”

Section: Application To Internal Solitary Waves In the South China Seamentioning

confidence: 99%

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Internal solitary waves: propagation, deformation and disintegration

Grimshaw

Pelinovsky

Talipova

et al. 2010

Nonlin. Processes Geophys.

162

139

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Abstract. In coastal seas and straits, the interaction of barotropic tidal currents with the continental shelf, seamounts or sills is often observed to generate largeamplitude, horizontally propagating internal solitary waves. Typically these waves occur in regions of variable bottom topography, with the consequence that they are often modeled by nonlinear evolution equations of the Kortewegde Vries type with variable coefficients. We shall review how these models are used to describe the propagation, deformation and disintegration of internal solitary waves as they propagate over the continental shelf and slope.

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Section: Application To Internal Solitary Waves In the South China Seamentioning

confidence: 99%

Section: Application To Internal Solitary Waves In the South China Seamentioning

confidence: 99%

Internal solitary waves: propagation, deformation and disintegration

Grimshaw

Pelinovsky

Talipova

et al. 2010

Nonlin. Processes Geophys.

162

139

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“…This mooring was recovered on 5 July 2009. The mooring was located west of the submarine Hengchun Ridge in LS, where internal waves have been observed by satellite and field studies (Du et al, 2008;Li, Farmer, Duda, & Ramp, 2009;Liu et al, 2006Liu et al, , 2008. An upward looking Acoustic Doppler Current Profiler (ADCP; 75 kHz RDI Workhorse) was mounted at 260 m depth.…”

Section: Field Observations and Datamentioning

confidence: 99%

“…The terrain of the strait makes it an active ground for the generation of internal waves. Recently, dramatic internal tides, solitary waves and bores were observed at locations from LS to the northern South China Shelf (NSCS) both in satellite images and field observations Hsu & Liu, 2000;Liu et al, 2006Liu et al, , 2008Yang et al, 2004;Zhao, Klemas, Zheng, & Yan, 2004).…”

Section: Introductionmentioning

confidence: 99%

Current Observations of Internal Tides and Parametric Subharmonic Instability in Luzon Strait

et al. 2012

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Acoustic Doppler Current Profiler (ADCP) measurements of the velocity structure in the thermocline in Luzon Strait are presented. The statistics for current, vertical variation of the inertia-gravity waveband, parametric subharmonic instability (PSI), and current shear are analyzed. It was found that 1) barotropic flow primarily consists of a nearly circular mixed tide. Diurnal tides are strongest and show smooth variance with a fortnightly spring-neap cycle, indicative of the astronomical tide-generating force. However, the semi-diurnal band power exhibits a high-frequency oscillation as a result of non-linear interactions. The high-frequency band power with high values during the spring tide oscillates with the tidal cycle. Near-inertial wave motions showing random variance may be caused by changes in the wind forcing at the sea surface or by random forcing. 2) Baroclinic velocities exhibit strong shear structure. The observed large changes in the amplitude of the baroclinic velocity and the limited vertical extent of the high-velocity cores may be interpreted as internal wave beams that pass through the observed water column. Semi-diurnal tides are dominant in the baroclinic velocity. Kinetic energy spectra also revealed that additional peaks were centred at sum-tidal-inertial interaction frequencies (such as M 2 + f) and difference-interaction frequencies (such as M 2 − f). The spectral exponent of the baroclinic velocity is ω −α (1 < α < 3). 3) Strong non-linear interactions among internal waves exist, and the semi-diurnal (M 2 ) component plays a key role in these interactions. Bicoherence analysis showed that M 2 /2 waves were non-linearly coupled with the dominant M 2 internal tide. 4) The polarization relations were used to diagnose observational internal tidal motions. Diurnal waves propagate to the east-northeast, and the semi-diurnal-diurnal waves propagate westward. In the case of diurnal tides, the minor to major axis ratio is different from the expected value of f/ω K1 because of the deviation of inclinations, whereas, for semi-diurnal tides, it is close to the expected value of f/ω M2 at depths from 30 to 150 m.RÉSUMÉ [Traduit par la rédaction] Nous présentons les mesures de la structure des vitesses dans la thermocline faites par profileur de courant à effet Doppler (ADCP) dans le détroit de Luçon. Nous analysons les statistiques sur le courant, la variation verticale de la gamme d'ondes d'inertie-gravité, l'instabilité subharmonique paramétrique (PSI) et le cisaillement du courant. Il ressort que 1) l'écoulement barotrope consiste principalement en une marée mixte presque circulaire. Les marées diurnes sont les plus fortes et présentent une variance régulière dans un cycle vives-eaux mortes-eaux de deux semaines qui révèle la nature astronomique de la force qui produit les marées. Cependant, la puissance de bande semi-diurne affiche une oscillation de haute fréquence causée par des interactions non linéaires. La puissance de bande de haute fréquence avec des valeurs élevées durant les ...

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“…Although affected by clouds, MODIS, and VIIRS sensors are able to offset the disadvantage by their wide swath, high-temporal resolution, and the free data support. The SCS is an ideal area for the ISW study because: (1) ISWs emanate almost daily from Luzon Strait during spring tides (Liu et al 2006); (2) the SCS has been an area of active ISW research for a few decades because the scale and amplitude of ISWs here is large; and (3) the location of the SCS is at low latitude, allowing abundant sun glint images to be acquired.…”

Section: Introductionmentioning

confidence: 99%

Tracking the internal waves in the South China Sea with environmental satellite sun glint images

Liu¹,

Hong²,

Ding³

et al. 2014

Remote Sensing Letters

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The propagation of internal solitary waves (ISWs) in the South China Sea (SCS) was tracked using National Aeronautics and Space Administration (NASA) Moderate Resolution Imaging Spectroradiometer (MODIS) and the Visible Infrared Imaging Radiometer Suite (VIIRS) sun glint image pairs. The acquisition times of the two images comprising the same pair is usually separated by about 2 hours. Four pairs of images in May and August 2013 were analysed. The ISW phase speeds were derived using the horizontal displacement of the ISW patterns and the time difference between the 2 satellite images. The phase speeds were in good agreement with the theoretical calculations using the Sturm-Louisville (S − L) equation with a non-linear term. Monthly ocean stratification data and bathymetry were used in the theoretical calculations. The ISW phase speeds are mainly affected by bottom depth, with seasonal variations. The ISWs propagated faster in August than in May. Our results also show that the ISW propagation in northern SCS can be mapped using environmental satellite sun glint images in short period of time with the advantage of large scale.

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Nonlinear internal waves from the Luzon Strait

Cited by 44 publications

References 6 publications

Internal solitary waves: propagation, deformation and disintegration

Internal solitary waves: propagation, deformation and disintegration

Current Observations of Internal Tides and Parametric Subharmonic Instability in Luzon Strait

Tracking the internal waves in the South China Sea with environmental satellite sun glint images

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