Tidal internal waves in the Bransfield Strait, Antarctica

<p>Observations of tidal internal waves in the Bransfield Strait, Antarctica, are analyzed. The measurements were carried out for 14 days on a moored station equipped with five autonomous temperature and pressure sensors. The mooring was deployed on the slope of Nelson Island (South Shetland Islands archipelago) over a depth of 70 m at point 62&#176;21&#42892; S, 58&#176;49&#42892; W. Analysis is based on the fluctuations of isotherms. &#160;Vertical displacements of temperature revealed that strong internal vertical oscillations up to 30&#8211;40 m are caused by the diurnal internal tide. Spectral analysis of vertical displacements of the 0.9&#176;C isotherm showed a clear peak at a period of 24 h. It is known that the tides in the Bransfield Strait are mostly mixed diurnal and semidiurnal, but during the Antarctic summer, diurnal tide component may intensify. The velocity ellipses of the barotropic tidal currents were estimated using the global tidal model TPXO9.0. It was found that tidal ellipses rotate clockwise with a period of 24 h and anticlockwise with a period of 12 h. The waves are forced due to the interaction of the barotropic tide with the bottom topography. Diurnal internal tides do not develop at latitudes higher than 30&#186; over flat bottom. The research was supported by RFBR grant 20-08-00246.</p>

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Propagation and interaction of non-linear surface and internal waves in a two-layer fluid

International Journal of Multiphase Flow ◽

10.1016/s0301-9322(97)88503-5 ◽

1996 ◽

Vol 22 ◽

pp. 138

Author(s):

S Korsunsky

Keyword(s):

Internal Waves ◽

Non Linear

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The structure and surface manifestation of the internal waves, excited by turbulent buoyant plumes in stratified fluid

Proceedings of the Sixth International Symposium On Turbulence, Heat and Mass Transfer ◽

10.1615/ichmt.2009.turbulheatmasstransf.390 ◽

2009 ◽

Author(s):

E. V. Ezhova ◽

D. A. Sergeev ◽

Yu. I. Troitskaya ◽

I. A. Soustova ◽

V. I. Kazakov

Keyword(s):

Internal Waves ◽

Stratified Fluid ◽

Buoyant Plumes ◽

Surface Manifestation

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Extended F-Expansion Method for Solving the modified Korteweg-de Vries (mKdV) Equation

Al-Jabar Jurnal Pendidikan Matematika ◽

10.24042/ajpm.v11i1.5153 ◽

2020 ◽

Vol 11 (1) ◽

pp. 93-100

Author(s):

Vina Apriliani ◽

Ikhsan Maulidi ◽

Budi Azhari

Keyword(s):

Wave Equation ◽

Exact Solutions ◽

Internal Waves ◽

Water Waves ◽

Wave Equations ◽

Elliptic Functions ◽

Expansion Method ◽

Mkdv Equation ◽

Innovative Methods ◽

De Vries

One of the phenomenon in marine science that is often encountered is the phenomenon of water waves. Waves that occur below the surface of seawater are called internal waves. One of the mathematical models that can represent solitary internal waves is the modified Korteweg-de Vries (mKdV) equation. Many methods can be used to construct the solution of the mKdV wave equation, one of which is the extended F-expansion method. The purpose of this study is to determine the solution of the mKdV wave equation using the extended F-expansion method. The result of solving the mKdV wave equation is the exact solutions. The exact solutions of the mKdV wave equation are expressed in the Jacobi elliptic functions, trigonometric functions, and hyperbolic functions. From this research, it is expected to be able to add insight and knowledge about the implementation of the innovative methods for solving wave equations.

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An analogy between electromagnetic and internal waves

Доклады Академии наук ◽

10.31857/s0869-56524854428-433 ◽

2019 ◽

Vol 485 (4) ◽

pp. 428-433

Author(s):

V. G. Baydulov ◽

P. A. Lesovskiy

Keyword(s):

Angular Momentum ◽

Conservation Laws ◽

Internal Wave ◽

Special Relativity ◽

Internal Waves ◽

Maxwell Equations ◽

Wave Equations ◽

Lagrange Function ◽

Lorentz Transformations ◽

Symmetry Transformations

For the symmetry group of internal-wave equations, the mechanical content of invariants and symmetry transformations is determined. The performed comparison makes it possible to construct expressions for analogs of momentum, angular momentum, energy, Lorentz transformations, and other characteristics of special relativity and electro-dynamics. The expressions for the Lagrange function are defined, and the conservation laws are derived. An analogy is drawn both in the case of the absence of sources and currents in the Maxwell equations and in their presence.

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