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Internal gravity waves in the atmosphere
Archiv für Meteorologie, Geophysik und Bioklimatologie Serie A, 1974One of the shortcomings of at least those lee-wave theories which are mathematically tractable with relative ease, is that they do not satisfy the perturbation energy equation. In this report we started from a simplified energy equation and by parameterizing certain terms using plausible assumptions, we arrived at a solution of the primitive equations ...
Elmar R. Reiter, Bernhard Haurwitz
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Theory of internal gravity wave saturation
pure and applied geophysics, 1989Gravity wave saturation is an important process affecting the transport and deposition of momentum, heat, and constituents in the earth’s atmosphere. This paper informally discusses several saturation mechanisms and their effects, including convection, Kelvin-Helmholtz instability, vortical mode instability, parametric subharmonic instability, and mean
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Internal gravity waves in the troposphere
Atmospheric and Oceanic Optics, 2014A technique for passive space sensing of the atmosphere in infrared and microwave ranges is discussed. The result of analysis of the sensing is the discovery of internal gravity waves (IGW) in the troposphere. It is possible now to investigate experimentally the infrasonic IGW with frequencies lower than 4 × 10−5 Hz.
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On the interaction of internal waves and surface gravity waves
Journal of Fluid Mechanics, 1974The perturbation of pre-existing surface gravity waves caused by the presence of an internal wave was studied both experimentally and analytically. An extensive series of experiments was performed, and quantitative results were obtained for the one-dimensional monochromatic interaction of internal waves and surface gravity waves.
Lewis, John E. +2 more
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2010
The study of internal gravity waves provides many challenges: they move along interfaces as well as in fully three-dimensional space, at relatively fast temporal and small spatial scales, making them difficult to observe and resolve in weather and climate models.
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The study of internal gravity waves provides many challenges: they move along interfaces as well as in fully three-dimensional space, at relatively fast temporal and small spatial scales, making them difficult to observe and resolve in weather and climate models.
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2003
In both the atmosphere and the ocean, the fluid is density stratified, i.e., ρ = ρ(z) (it is also a function of horizontal coordinates and time) so that usually dense fluid underlies lighter fluid. This stratification supports a new class of waves called internal waves.
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In both the atmosphere and the ocean, the fluid is density stratified, i.e., ρ = ρ(z) (it is also a function of horizontal coordinates and time) so that usually dense fluid underlies lighter fluid. This stratification supports a new class of waves called internal waves.
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Internal Gravity Waves in a Stratified Medium
2021Let us now turn to movements in the sea column, when surface phenomena play a negligible role. As noted in the initial sections, the density of seawater in the local vicinity of a certain observation point is a function of temperature, pressure, and concentration of impurities at that point.
Anatoly Kistovich +2 more
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Asymptotic Analysis of the Forced Internal Gravity Wave Equation
SIAM Journal on Applied Mathematics, 2012Summary: An asymptotic analysis of impulsively started, forced linear internal gravity waves is presented. This investigation describes horizontally propagating waves for fluids with constant buoyancy frequency in a domain of finite vertical extent. The analysis provides a description for the wave field in the large time limit.
Tim Rees +2 more
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On the instability of an internal gravity wave
Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1977Abstract The linear stability of an internal gravity wave of arbitrary amplitude in an unbounded stratified inviscid Boussinesq fluid is considered mathematically. The instability is shown to be governed by a Floquet system and treated by a generalization of the method of normal modes.
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An instability of internal gravity waves
Journal of Fluid Mechanics, 1972When water is slightly stratified, internal gravity waves are considerably shorter than surface waves of comparable frequency. Here, this fact is exploited in demonstrating that an internal wave is unstable when it forms part of a resonant triad with a surface wave and another internal wave whose wave number is approximately equal to that of the ...
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