The status of observations and theory of high latitude ionospheric and magnetospheric plasma turbulence

Kintner, P. M.; Seyler, C. E.

doi:10.1007/bf00241347

Cited by 154 publications

(183 citation statements)

References 81 publications

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“…Some reports seem to distinguish drift and transverse velocity shear-driven turbulence (Kintner and Seyler, 1985;Basu et al, 1988). Indeed in what could be called the production range, we might expect differences.…”

Section: Space Observationsmentioning

confidence: 95%

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Spectral properties of electrostatic drift wave turbulence in the laboratory and the ionosphere

Pécseli

2015

Ann. Geophys.

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Abstract. Low-frequency electrostatic drift wave turbulence has been studied in both laboratory plasmas and in space. The present review describes a number of such laboratory experiments together with results obtained by instrumented spacecraft in the Earth's near and distant ionospheres. The summary emphasizes readily measurable quantities, such as the turbulent power spectra for the fluctuations in plasma density, potential and electric fields. The agreement between power spectra measured in the laboratory and in space seems to be acceptable, but there are sufficiently frequent counterexamples to justify a future dedicated analysis, for instance by numerical tools, to explain deviations. When interpreting spectra at low ionospheric altitudes, it is necessary to give attention to the DC ionospheric electric fields and the differences in the physics of electron-ion collisions and collisions of charged particles with neutrals for cases with significant Hall drifts. These effects modify the drift wave spectra. A dedicated laboratory experiment accounted for some of these differences.

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Section: Space Observationsmentioning

confidence: 95%

“…Following the set-up used elsewhere (Kintner and Seyler, 1985), we summarize selected results in Tables 2 and 3, with parts of the information summarized in Figs. 9 and 10.…”

Section: Space Observationsmentioning

confidence: 99%

Spectral properties of electrostatic drift wave turbulence in the laboratory and the ionosphere

Pécseli

2015

Ann. Geophys.

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“…The turbulent character found in these regions may have multiple origins. Some theories relate the turbulence directly to turbulence in the solar wind, and others associate it with structures of magnetospheric origin, suggesting that it can be a consequence of a strong shear flow regime, of a strong gradient drift and/or of a current convective regime (Kintner and Seyler 1985). However, the emergence of these turbulence regimes is related to the enhancement of plasma density irregularities and to the development of the Kelvin-Helmoholtz instability.…”

Section: Introductionmentioning

confidence: 99%

Observations of high-latitude geomagnetic field fluctuations during St. Patrick’s Day storm: Swarm and SuperDARN measurements

et al. 2016

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The aim of this work is to study the properties of the magnetic field's fluctuations produced by ionospheric and magnetospheric electric currents during the St. Patrick's Day geomagnetic storm (17 March 2015). We analyse the scaling features of the external contribution to the horizontal geomagnetic field recorded simultaneously by the three satellites of the Swarm constellation during a period of 13 days (13-25 March 2015). We examine the different latitudinal structure of the geomagnetic field fluctuations and analyse the dynamical changes in the magnetic field scaling features during the development of the geomagnetic storm. Analysis reveals consistent patterns in the scaling properties of magnetic fluctuations and striking changes between the situation before the storm, during the main phase and recovery phase. We discuss these dynamical changes in relation to those of the overall ionospheric polar convection and potential structures as reconstructed using SuperDARN data. Our findings suggest that distinct turbulent regimes characterised the mesoscale magnetic field's fluctuations and that some factors, which are known to influence large-scale fluctuations, have also an influence on mesoscale fluctuations. The obtained results are an example of the capability of geomagnetic field fluctuations data to provide new insights about ionospheric dynamics and ionosphere-magnetosphere coupling. At the same time, these results could open doors for development of new applications where the dynamical changes in the scaling features of the magnetic fluctuations are used as local indicators of magnetospheric conditions.

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“…The densities of magnetospheric field-aligned currents often reach magnitudes which might be sufficient for the excitation of some plasma instabilities [Fredricks et al, 1973;Keskinen and Ossakow, 1983;Kintner and Seyler, 1985]. This, in its turn, results in the occurrence of an anomalous conductivity •r, and an anomalous parallel electric field E*, acceleration and precipi-II tation of particles, and fluctuations of ionospheric currents and magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Coupling between field‐aligned current impulses and Pi1 noise bursts

Пилипенко¹,

Шалимов²,

Fedorov³

et al. 1999

J. Geophys. Res.

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Abstract. The estimated densities of local field-aligned currents related to nighttime substorm onset or magnetic impulse events at cusp latitudes may exceed the threshold for the excitation of high-frequency turbulence in the topside ionosphere. The evolution of an ion-acoustic instability is shown to lead to qu•i-oscillations around the saturation level. Consequent variations in anomalous conductivity will result in pulsed electron precipitation •nd noise generation in the Pil band. This proposed mechanism gives a natural interpretation to the experimentally observed coupling between localized magnetic disturbances, electron precipitation/acceleration, and bursts of high-frequency ULF noise. The alternative interpretations based on mechanisms of ion cyclotron instability stimulation and ionospheric Alfven resonator excitation can be applied only under specific pl•ma conditions.

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The status of observations and theory of high latitude ionospheric and magnetospheric plasma turbulence

Cited by 154 publications

References 81 publications

Spectral properties of electrostatic drift wave turbulence in the laboratory and the ionosphere

Spectral properties of electrostatic drift wave turbulence in the laboratory and the ionosphere

Observations of high-latitude geomagnetic field fluctuations during St. Patrick’s Day storm: Swarm and SuperDARN measurements

Coupling between field‐aligned current impulses and Pi1 noise bursts

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