Evidence of internal swash associated with Sulu Sea solitary waves?

Chapman, David C.; Giese, Graham S.; Collins, Margaret Goud; Encarnacion, Rolu; Jacinto, Gil S.

doi:10.1016/0278-4343(91)90014-w

Cited by 8 publications

(8 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The background density distribution in the numerical runs was set by choosing the profiles typical for the Andaman and Sulu Seas (Levitus and Boyer 1994;Levitus et al 1994), where large-amplitude solitary internal waves and their shoaling [and breaking, as in the Sulu Sea, (Chapman et al 1991)] were observed (Fig. 1b).…”

Section: Model Initializationmentioning

confidence: 99%

“…The main problem with such an approach is that the nonlinear advection and dispersion coefficients estimated from observational data, assumed small, are often not really small, and theories fail to describe the large amplitude ISW (with amplitudes up to 100 m and more) observed, for instance in the Andaman Sea (Perry and Schimke 1965;Osborne and Burch 1980), in the Sulu Sea (Apel et al 1985;Liu et al 1985), at the Mascarene Ridge (Sabinin 1992;Konyaev et al 1995), near the Strait of Gibraltar (Bockel 1962;Bryden et al 1994), and in the central Bay of Biscay (New and Pingree 1990). Probably for this reason, there is still no satisfactory theoretical description of the experimental data obtained in the Sulu Sea (Chapman et al 1991) and the Pechora Sea (Serebryany and Shapiro 2000) on the breaking of oceanic internal solitary waves. The strong nonlinearity demands an appropriate theoretical description either on the basis of revised weakly nonlinear theories, which include higherorder nonlinearities (see, e.g., Grimshaw et al 1999;Holloway et al 1999;Stanton and Ostrovsky 1998), or a complete system of equations that takes into account the full nonlinearities of the wave motion.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Experiments on the Breaking of Solitary Internal Wavesover a Slope–Shelf Topography

Vlasenko¹,

Hutter²

2002

J. Phys. Oceanogr.

227

170

View full text Add to dashboard Cite

A theoretical study of the transformation of large amplitude internal solitary waves (ISW) of permanent form over a slope-shelf topography is considered using as basis the Reynolds equations. The vertical fluid stratification, amplitudes of the propagating ISWs, and the bottom parameters were taken close to those observed in the Andaman and Sulu Seas. The problem was solved numerically. It was found that, when an intense ISW of depression propagates from a deep part of a basin onto the shelf with water depth H s , a breaking event will arise whenever the wave amplitude a m is larger than 0.4(H s Ϫ H m), where H m is the undisturbed depth of the isopycnal of maximum depression. The cumulative effect of nonlinearity in a propagating ISW leads to a steepening and overturning of a rear wave face over the inclined bottom. Immediately before breaking the horizontal orbital velocity at the site of instability exceeds the phase speed of the ISW. So, the strong breaking is caused by a kinematic instability of the propagating wave. At the latest stages of the evolution the overturned hydraulic jump transforms into a horizontal density intrusion (turbulent pulsating wall jet) propagating onto the shelf. The breaking criterion of the ISW over the slope was found. Over the range of examined parameters (0.52Њ Ͻ ␥ Ͻ 21.8Њ, where ␥ is the slope angle) the breaking event arises at the position with depth H b , when the nondimensional wave amplitude ϭ a m /(H b Ϫ H m) satisfies the condition ഡ 0.8Њ/␥ ϩ 0.4. If the water depth a a H s on a shelf is less than H b , a solitary wave breaks down before it penetrates into a shallow water zone; otherwise (at H s Ͼ H b) it passes as a dispersive wave tail onto the shelf without breaking.

show abstract

Section: Model Initializationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Experiments on the Breaking of Solitary Internal Wavesover a Slope–Shelf Topography

Vlasenko¹,

Hutter²

2002

J. Phys. Oceanogr.

227

170

View full text Add to dashboard Cite

show abstract

“…Advection by breaking internal waves might be important in a variety of environmental phenomena; there is only scant information, however, on the effects of internal bores in the coastal and nearshore ocean. Studies have concentrated in the Southern California Bight (but see Chapman et al, 1991), where the sudden ascent of the thermocline has been related to internal bores (Arthur, 1954;Stevenson and Gorsline, 1956;Summers and Emery, 1963;Emery and Gunnerson, 1973;Winant and Olson, 1976). Cairns (1967) described internal tidal waves becoming asymmetric when entering shallow water, and Winant (1974) observed nearshore broken internal waves propagating as surges of cold water, and he proposed that the internal bores might be strongly three-dimensional.…”

Section: Introductionmentioning

confidence: 99%

Internal tidal bores in the nearshore: Warm-water fronts, seaward gravity currents and the onshore transport of neustonic larvae

Pineda¹

1994

issn: 0022-2402

170

179

View full text Add to dashboard Cite

Nearshore temperature fluctuations are associated with energetic cross-shore two-way flows that influence the onshore transport of neustonic larvae. Water temperature near the surface and bottom at two nearshore stations off southern California (6 and 15 m water depth, respectively) can drop sharply and subsequently rise. Two or more consecutive drops and rises can occur at diurnal or semidiurnal periodicities. The temperature increases may be accompanied by energetic seaward bottom currents together with sharp-edged warm-water fronts. (Warm-water fronts are defined here as linear seasurface features dividing parcels of water of different temperature.) Shoreward-moving surface fronts divided bodies of water of different surface temperature, where the coldest water body was inshore. Fronts disappeared at (or close to) the surf zone. The sharp drops in water temperature are interpreted as the onshore advection of subsurface water by large internal tidal bores, and it is concluded that the sudden increases in temperature and cross-shore advection are epiphenomena of internal tidal bores. Internal tidal bores have been invoked previously to explain the onshore transport of water-column larvae. This study tests the hypothesis that shoreward surface flow, an epiphenomenon of internal tidal bores, transports neustonic larvae in warm-water fronts. Five warm-water fronts were sampled in shallow water (about 6 m) for temperature and fish and crab larvae in June-July 1992. These larvae were more abundant in fronts than in parcels of water preceding or following the front. Peaks in larval abundance were accompanied by a sharp rise in temperature, in itself evidence for onshore transport of surface water. It is concluded that both warm-water fronts and internal tidal bores play a key role in the exchange across the shelf of material and water properties, and that internal tidal-bore phenomena explain well the transport of both water-column and neustonic larvae in different habitats.

show abstract

“…In the Sulu Sea the tide-generated largeamplitude internal solitary waves propagate northwestward to Palawan Island (the Philippines) Liu et al, 1985). The coupling between the internal waves and the supertidal frequency harbor oscillations as well as the internal swash at Puerto Princesa on Palawan Island was observed (Chapman et al, 1991;Chapman and Giese, 1990;Giese and Hollander, 1987). Because the breakdown of the internal solitary waves occurs mainly in coastal water, the ultimate and final turbulent dissipation of the internal solitary waves is of a little significance for the interior mixing in the global thermohaline circulation.…”

Section: The Breaking Products Of Internal Tidesmentioning

confidence: 95%

“…Their numerical experiments were performed for the vertical fluid stratification and bottom parameters close to those observed in the Andaman and Sulu Seas. The results of breaking were measured in the Sulu Sea (Chapman et al, 1991) and the Pechora Sea (Serebryany and Shapiro, 2000). In addition, this internal swash was measured in the coastal water in the Bohai Sea and in the north of the South China Sea by Shi et al (personal communication, 2010).…”

Section: The Breaking Products Of Internal Tidesmentioning

confidence: 99%

Is the small-scale turbulence an exclusive breaking product of oceanic internal waves

Zhong

2011

Acta Oceanol. Sin.

View full text Add to dashboard Cite

On the basis of the theoretical research results by the author and the literature published up to date, the analysis and the justification presented in this paper show that the breaking products of oceanic internal waves are not only turbulence, but also the fine-scale near-inertial internal waves (the oceanic reversible finestructure) for inertial waves and the internal solitary waves for internal tides respectively. It was found that the oceanic reversible finestructure may be induced by the effect of the horizontal component f ( f = 2Ω cosφ) of the rotation vector on inertial waves. And a new instability of the theoretical shear and strain spectra due to the effect of f occurs at critical vertical wavenumber β c ≈0.1 cpm. It happens when the levels of shear and strain of the reversible finestructure are higher than those of inertial waves, which is induced by the effect of f along an "iso-potential-pycnal" of internal wave. If all breaking products of internal waves are taken into account, the average kinetic energy dissipation rate is an order of magnitude larger than the values of turbulence observed by microstructure measurements. The author's theoretical research results are basically in agreement with those observed in IWEX, DRIFTER and PATCHEX experiments. An important impersonal fact is that on the mean temporal scale of thermohaline circulation these breaking products of internal waves exist simultaneously with turbulence. Because inertial waves are generated by winds at the surface, and internal tides are generated by strong tide-topography interactions, the analysis and justification in this paper support in principle the abyssal recipes II: energetics of tidal and wind mixing by Munk & Wunsch in 1998, in despite of the results of microstructure measurements for the turbulent kinetic energy dissipation rate and the diapycnal turbulent eddy diffusivity.

show abstract

Evidence of internal swash associated with Sulu Sea solitary waves?

Cited by 8 publications

References 9 publications

Numerical Experiments on the Breaking of Solitary Internal Wavesover a Slope–Shelf Topography

Numerical Experiments on the Breaking of Solitary Internal Wavesover a Slope–Shelf Topography

Internal tidal bores in the nearshore: Warm-water fronts, seaward gravity currents and the onshore transport of neustonic larvae

Is the small-scale turbulence an exclusive breaking product of oceanic internal waves

Contact Info

Product

Resources

About