Polar tongue of ionisation during geomagnetic superstorm [PDF]
Annales Geophysicae, 2021 During the main phase of geomagnetic storms, large positive ionospheric plasma density anomalies arise at middle and polar latitudes. A prominent example is the tongue of ionisation (TOI), which extends poleward from the dayside storm-enhanced density ...
D. Pokhotelov +2 more
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Ionosphere-Thermosphere Interactions Based on NCAR-TIEGCM: The Influence of the Interplanetary Magnetic Field(IMF)-Dependent Ionospheric Convection on the High-Latitude Lower Thermospheric Wind [PDF]
Journal of Astronomy and Space Sciences, 2004 To better understand how high-latitude electric fields influence thermospheric dynamics, winds in the high-latitude lower thermosphere are studied by using the Thermosphere-Ionosphere Electrodynamics General Circulation Model developed by the National ...
Young-Sil Kwak +2 more
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Ionospheric response to traveling convection twin vortices
Geophysical Research Letters, 1994 Traveling convection twin vortices have been observed for several years. At ionospheric altitudes, the twin vortices correspond to spatially localized, transient structures embedded in a large‐scale background convection pattern. The convection vortices are typically observed in the morning and evening regions.
Schunk, Robert W. +2 more
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Orientation of the cross-field anisotropy of small-scale ionospheric irregularities and direction of plasma convection [PDF]
Annales Geophysicae, 2005 The relationship between the orientation of the small-scale ionospheric irregularity anisotropy in a plane perpendicular to the geomagnetic field and the direction of plasma convection in the F region is investigated.
E. D. Tereshchenko +2 more
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Problems with deducing ionospheric plasma convection patterns
Journal of Geophysical Research: Space Physics, 1986 It is well‐known that convection electric fields have an important effect on the ionosphere‐thermosphere system at high latitudes and that a quantitative understanding of their effect requires a knowledge of the plasma convection pattern. Consequently, convection electric fields have been measured by a variety of techniques, including satellite, rocket,
Sojka, Jan Josef, Schunk, Robert W.
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Driving Magnetosphere Convection through the ionosphere
, 2023 Abstract The Dungey cycle is a fundamental concept in understanding magnetosphere convection in the presence of the interplanetary magnetic field (IMF). It explains that the convection within the closed part of the magnetosphere is primarily driven by magnetic reconnection in the nightside magnetospheric tail.
Lei Dai +9 more
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Interhemispheric observations of nightside ionospheric electric fields in response to IMF Bz and By changes and substorm pseudobreakup [PDF]
Annales Geophysicae, 2000 HF radar data during equinoctial, small IMF By conditions have enabled the ionospheric convection during the substorm growth phase and substorm pseudobreakup to be studied in both hemispheres.
T. K. Yeoman +6 more
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Analysis of Ionospheric Disturbance Response to the Heavy Rain Event
Remote Sensing, 2022 Meteorological activities in the troposphere would affect electron concentrations and distributions in the ionosphere, thereby exciting ionospheric disturbance.
Jian Kong +3 more
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A plasma vortex revisited: The importance of including ionospheric conductivity measurements [PDF]
, 2004 In an earlier paper [Kosch et al., 1998], simultaneous all-sky TV imager and Scandinavian Twin Auroral Radar Experiment (STARE) observations of an ionospheric plasma vortex located poleward of an auroral arc were presented.
Amm, O. +2 more
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Polar cap flow channel events: spontaneous and driven responses [PDF]
Annales Geophysicae, 2010 We present two case studies of specific flow channel events appearing at the dusk and/or dawn polar cap boundary during passage at Earth of interplanetary (IP) coronal mass ejections (ICMEs) on 10 January and 25 July 2004.
P. E. Sandholt +2 more
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