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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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2013
This chapter focuses on internal gravity waves in a stable thermal stratification. When the amplitude of the fluid velocity is small relative to the amplitude of the phase velocity, a linear analysis, which neglects advection, provides insight to the relation between the wavelength and frequency of internal gravity waves.
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This chapter focuses on internal gravity waves in a stable thermal stratification. When the amplitude of the fluid velocity is small relative to the amplitude of the phase velocity, a linear analysis, which neglects advection, provides insight to the relation between the wavelength and frequency of internal gravity waves.
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Parametric instability of internal gravity waves
Journal of Fluid Mechanics, 1975A continuously stratified fluid, when subjected to a weak periodic horizontal acceleration, is shown to be susceptible to a form of parametric instability whose time dependence is described, in its simplest form, by the Mathieu equation. Such an acceleration could be imposed by a large-scale internal wave field. The growth rates of small-scale unstable
McEwan, A. D., Robinson, R. M.
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Internal atmospheric gravity waves at ionospheric heights
Canadian Journal of Physics, 1960Irregularities and irregular motions in the upper atmosphere have been detected and studied by a variety of techniques during recent years, but their proper interpretation has yet to be established. It is shown here that many or most of the observational data may be interpreted on the basis of a single physical mechanism, namely, internal atmospheric ...
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Internal‐Wave Action in Gravity Clarifier
Journal of Environmental Engineering, 1991Because the flow in a gravity clarifier is stratified, internal waves can develop in regions where a large concentration gradient exists. In this study, we determine the locale of internal waves inside the clarifier tank and show that they are present only in the upper third of the tank.
Lionel Catalan +3 more
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Resonat and Non-Resonant Wave-Wave Interactions for Internal Gravity Waves
1980The purpose of this study is to investigate the means by which energy is transferred among internal gravity waves. The transfer of energy in weakly interacting flows is characterized by resonant interactions in which the interaction time scale is much greater than the component wave periods.
Carmen Cerasoli, I. Orlanski
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Sound and Internal Gravity Waves
2019In the last three chapters, shallow and free surface water waves were treated, with gravity and capillarity as the driving forces. The subject of the present, brief chapter are two new wave types with (partially) different driving forces: first, sound waves due to perturbations of the thermal pressure, and, second, internal gravity waves due to ...
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Meteotsunami genesis - Atmospheric Internal Gravity Waves
2021Meteorological tsunamis are known to be generated by atmospheric disturbances. However, little is known about how these atmospheric disturbances are created. This project is thus looking at the processes responsible for the atmospheric Internal Gravity Waves (IGW) which are at the origin of the meteotsunamis through the Proudman resonance.
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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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