Nonlinear acoustic-gravity waves and dust particle redistribution in earth's atmosphere

Izvekova, Yu. N.; Popel, S. I.; Chen, B.B.

doi:10.1016/j.jastp.2015.09.013

Cited by 9 publications

(4 citation statements)

References 22 publications

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“…As discussed in the introduction, the dust number density can vary in the region of interest due to complex dust forming processes and exists upto altitudes of 130 km [62]. Figures 15(a) and (b) show the plot of the growth rate, γ r and frequency,ω r with electron drift velocity, V e0 for the case of uniform size dust having three different dust densities in the EEJ region.…”

Section: Effect Of Dust Number Densitymentioning

confidence: 99%

“…Rosenberg and shukla [61] developed the theory for the EEJ altitudes (∼95 km − ∼ 105 km), in which only electrons are magnetized while ions and dust particles are unmagnetized. However, it has been shown that dust particles may exist upto an altitude of ∼130km, due to the transportation of dust particles by dust vortices (formed at altitudes ∼110 km − ∼ 120 km) which appear as a result of acoustic gravity wave instability [62].…”

Section: Introductionmentioning

confidence: 99%

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Effect of dusty plasma parameters on the low frequency Hall current instability

Sarkar¹,

Atul²,

Laishram³

2022

Phys. Scr.

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The effect of power-law dust size distribution and dust number density on the low frequency hall current instabilities have been studied in and above the equatorial electrojet altitudes using a linear fluid model consisting of electrons, ions and dust particles. The dispersion relation includes electron and ion drift perpendicular to the equilibrium uniform electric and magnetic field, mass and pressure of the charged species and collision between charged and neutral particles. The effect of dust size variation and dust number density on the instability have been investigated by varying the dust-plasma frequency in the dispersion relation. It has been found that in the region of the electrojet altitudes the variation of dust size for the case of broad dust size distribution and dust number density can substantially increase the growth rate and frequency of the instability. However, above the electrojet region where ions become weakly magnetized, the above two dust parameters have a negligible effect on the instability.The present analysis is applicable to the dusty meteor trail plasma of the ionospheric E-region.

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Section: Effect Of Dust Number Densitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of dusty plasma parameters on the low frequency Hall current instability

Sarkar¹,

Atul²,

Laishram³

2022

Phys. Scr.

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“…The spectrum amplitude in the stratosphere is higher than that in the troposphere, regardless of whether the data are from rising or falling stages. If only the gravity waves propagating upward from the ground are considered, they will be more easily absorbed by the "critical layer" caused by the rapids zone near the tropopause when passing through high-altitude jets, so the spectrum amplitude of temperature fluctuation in the stratosphere will decrease [24][25][26]. However, in fact, all 16 sets of data show that the spectrum amplitude in the stratosphere is larger than that in the troposphere, indicating that there are still sources of gravity waves in the stratosphere (above 24 km).…”

Section: Spectral Amplitude and Spectral Slopementioning

confidence: 99%

Spectrum Analysis of Gravity Waves Based on Sensors Mounted on a New Round-Trip Airborne Flat-Floating Sounding System

Sheng

Zhang

et al. 2020

Sensors

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In this study, sensors mounted on a new type of round-trip airborne flat-floating sounding system (RTAFSS) were used to obtain the observation data of the three stages of "rising, flat-floating and falling". This new sounding method has a good application prospect. We performed spectrum analysis on the normalized temperature fluctuation, and the vertical wavenumber spectrum from the rising and falling stages and the horizontal wavenumber spectrum from the flat-floating stage were obtained. This is the first time the complete gravity wave spectrum characteristics were obtained from three consecutive stages: rising, flat-floating and falling. The results show that the gravity wave spectrum of the three stages can be well obtained by RTAFSS. For the horizontal wavenumber spectrum, the spectral slope is basically around −2, and the difference in the spectral structure of the horizontal wave number spectrum may be due to the intermittent turbulent activity and the variable intensity of the gravitational wave during its propagation. This study aims to make experimental exploration of the spectrum characteristics of gravity waves by this new type of observation data. It is expected to reveal the spectrum characteristics of horizontal wavenumber in the stratosphere region of China, providing a theoretical basis for spectrum analysis in a wider space-time range after further network observation of RTAFSS.

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“…Recently, Izvekova et al [19] had shown the possibility of AGW instability in non-adiabatic terrestrial atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear evolution of internal gravity waves in the Earth's ionosphere: Analytical and numerical approach

Kaladze,

Misra,

Roy

et al. 2021

Preprint

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The nonlinear propagation of internal gravity waves in the weakly ionized, incompressible Earth's ionosphere is studied using the fluid theory approach. Previous theory in the literature is advanced by the effects of the terrestrial inhomogeneous magnetic field embedded in weakly ionized ionospheric layers ranging in altitude from about 50 to 500 km. It is shown that the ionospheric conducting fluids can support the formation of solitary dipolar vortices (or modons). Both analytical and numerical solutions of the latter are obtained and analyzed. It is found that in absence of the Pedersen conductivity, different vortex structures with different space localization can be formed which can move with the supersonic velocity without any energy loss. However, its presence can cause the amplitude of the solitary vortices to decay with time and the vortex structure can completely disappear owing to the energy loss. Such energy loss can be delayed, i.e., the vortex structure can prevail for relatively a longer time if the nonlinear effects associated with either the stream function or the density variation become significantly higher than the dissipation due to the Pedersen conductivity. The main characteristic dynamic parameters are also defined which are in good correlation with the existing experimental data.

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Nonlinear acoustic-gravity waves and dust particle redistribution in earth's atmosphere

Cited by 9 publications

References 22 publications

Effect of dusty plasma parameters on the low frequency Hall current instability

Effect of dusty plasma parameters on the low frequency Hall current instability

Spectrum Analysis of Gravity Waves Based on Sensors Mounted on a New Round-Trip Airborne Flat-Floating Sounding System

Nonlinear evolution of internal gravity waves in the Earth's ionosphere: Analytical and numerical approach

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