Ionospheric turbulence: Interchange instabilities and chaotic fluid behavior

Huba, J. D.; Hassam, A. B.; Schwartz, Ira B.; Keskinen, M. J.

doi:10.1029/gl012i001p00065

Cited by 50 publications

(44 citation statements)

References 18 publications

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“…In most cases they are equal to the fractal dimension. The chaotic behavior of ionospheric electron density fluctuations resulting from the interchange instabilities has been investigated by Huba et al [1985] and Hassam et al [ 1986]. In the first paper it has been shown that for a three-mode system the nonlinear equations describing the Rayleigh-Taylor and E x B gradient drift instabilities reduce to equations which describe the so-called Lorenz attractor for Rayleigh-Benard instability, a typical example of the chaotic system.…”

Section: Paper Number 93rs01828mentioning

confidence: 99%

Chaotic behavior of ionospheric scintillation: Modeling and observations

Wernik¹,

Yeh²

1994

Radio Science

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Abstract. The chaotic, but nondeterministic, structure of the ionosphere and radio wave amplitude and phase scintillation measured on the ground have been simulated using the phase screen model with the power law spectrum of random Gaussian phase fluctuations. Comparison of the information dimension calculated for phase fluctuations on a screen with that for amplitude scintillation at the receiver shows that the original chaotic structure in the ionosphere is completely masked by the propagation effects. Hence the ionospheric turbulence attractor (if it exists) cannot be reconstructed from amplitude scintillation data. On the other hand, measured phase scintillation data adequately reproduce the assumed chaotic structure in the ionosphere. Results of the attractor reconstruction for amplitude scintillation observed at high latitudes show an excellent agreement with our simulation. IntroductionIn recent years the concepts of chaos and nonlinear dynamics have found application in studying the behavior of various complex systems. Their attractiveness stems from the fact that they provide a relatively simple statistical description of the system. Although the use of the nonlinear dynamics approach does not tell us about the physical nature of a system, the theoretical model of the system should aim in reproducing the results of nonlinear analysis.It is known that ionospheric plasma turbulence causes scintillation of transionospheric radio signals. An important question is what can we learn about the irregular structure from scintillation measurements. The answer to this question is provided by the scintillation theory which relates the measured statistical parameters of scintillation and statistics of irregularities [Yeh and Liu, 1982]. It has been found, for instance, that the phase and amplitude scintillation spectra can be used to deduce the form of the power spectrum of electron density fluctuations. However, the power spectrum does not describe unambiguously the turbulent nature of

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Section: Paper Number 93rs01828mentioning

confidence: 99%

Chaotic behavior of ionospheric scintillation: Modeling and observations

Wernik¹,

Yeh²

1994

Radio Science

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“…Our electrostatic model derived in are generalizations of the model for ionospheric turbulence derived by Huba et al (1985) and applied to this problem by Hassam et al (1985). On the other hand this model is also a gener-alization of generic models for drift wave turbulence, which has been applied to ionospheric problems as well as laboratory plasmas, including edge turbulence in magnetic confinement devices.…”

Section: Discussionmentioning

confidence: 99%

Non-equilibrium quasi-stationary states in a magnetized plasma

Rypdal

Paulsen

Garcia

et al. 2003

Nonlin. Processes Geophys.

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Abstract. Non-equilibrium quasi-stationary states resulting from curvature driven interchange instabilities and driftwave instabilities in a low beta, weakly ionized, magnetized plasma are investigated in the context of laboratory experiments in a toroidal configuration. Analytic modelling, numerical simulations and experimental results are discussed with emphasis on identifying the unstable modes and understanding the physics of anomalous particle and energy fluxes and their linkage to self-organized pressure profiles.

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“…͑17͒ and ͑18͒ occur in ionospheric turbulence. 19 Furthermore, models with similar mathematical structures were derived for fully ionized plasmas by several authors. 4,18,24,25 We call Eqs.…”

Section: ͑15͒mentioning

confidence: 99%

Anomalous particle transport in a low-temperature plasma without magnetic shear

Eickermann

Spatschek

1996

Physics of Plasmas

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A simple shearless model for collisional drift waves in low-temperature plasmas is analyzed to point at fluctuation-induced anomalous plasma transport. Spatially coherent structures do play an important role in the particle transport beyond a critical magnetic field strength. The transition from collisional to fluctuation-induced transport is investigated. Special emphasis is put on analytical models for understanding the transition. The results from numerical simulations are interpreted.

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Ionospheric turbulence: Interchange instabilities and chaotic fluid behavior

Cited by 50 publications

References 18 publications

Chaotic behavior of ionospheric scintillation: Modeling and observations

Chaotic behavior of ionospheric scintillation: Modeling and observations

Non-equilibrium quasi-stationary states in a magnetized plasma

Anomalous particle transport in a low-temperature plasma without magnetic shear

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