ALTAIR Radar Study of Equatorial Spread F.

Tsunoda, Roland T.

doi:10.21236/ada104554

Cited by 3 publications

(2 citation statements)

References 17 publications

(25 reference statements)

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“…In some of the above situations, the equilibrium flow velocity is observed to be inhomogeneous. For example, in the ionosphere, the horizontal plasma velocity during equatorial spread F (ESF) reverses its direction as a function of altitude [Kudeki et al, 1981;Tsunoda, 1981b;Tsunoda and White, 1981;Kelley et al, 1981]. In the plasmasphere, steep shear in the flow velocity can exist due to the dominating corotating electric field inside the plasmasphere and a convective magnetospheric electric field penetrating across the plasmapause.…”

Section: Introductionmentioning

confidence: 99%

Rayleigh‐Taylor instability in the presence of a stratified shear layer

Satyanarayana¹,

Guzdar²,

Huba³

et al. 1984

J. Geophys. Res.

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A nonlocal theory of the Rayleigh‐Taylor instability, which includes the effect of a transverse velocity shear, is presented. A two‐fluid model is used to describe an inhomogeneous plasma under the influence of gravity and sheared equilibrium flow velocity and to derive a differential equation describing the generalized Rayleigh‐Taylor instability. An extensive parametric study is made in the collisionless and collisional regimes, and the corresponding dispersion curves are presented. The results are applied to the equatorial F region and to barium releases in the ionosphere.

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Section: Introductionmentioning

confidence: 99%

Rayleigh‐Taylor instability in the presence of a stratified shear layer

Satyanarayana¹,

Guzdar²,

Huba³

et al. 1984

J. Geophys. Res.

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“…Indced, evidence mounts that the west wall of the depletion is convectively unstable because of an eastward neutral wind ii [Tsunoda, 1981;Singh et al, 1981]. Because the gradient varies with height, the locally unstable regions should have a varying local outer scale.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Nuclear Propagation Effects Utilizing Wideband Satellite Data.

Rino¹,

Owen²,

Livingston³

1981

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Influence of velocity shear on the Rayleigh‐Taylor instability

Guzdar¹,

Satyanarayana²,

Huba³

et al. 1982

Geophysical Research Letters

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The influence of a transverse velocity shear on the Rayleigh‐Taylor instability is investigated. It is found that a sheared velocity flow can substantially reduce the growth rate of the Rayleigh‐Taylor instability in the short wavelength regime (i.e., kL > 1 where L is the scale length of the density inhomogeneity), and causes the growth rate to maximize at kL < 1.0. Applications of this result to ionospheric phenomena [equatorial spread F (ESF) and ionospheric plasma clouds] are discussed. In particular, the effect of shear could account for, at times, the 100’s of km modulation observed on the bottomside of the ESF ionosphere and the km scale size wavelengths observed in barium cloud prompt striation phenomena.

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ALTAIR Radar Study of Equatorial Spread F.

Cited by 3 publications

References 17 publications

Rayleigh‐Taylor instability in the presence of a stratified shear layer

Rayleigh‐Taylor instability in the presence of a stratified shear layer

Analysis of Nuclear Propagation Effects Utilizing Wideband Satellite Data.

Influence of velocity shear on the Rayleigh‐Taylor instability

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