Ionospheric convection during nonsteady interplanetary magnetic field conditions
نویسندگان
چکیده
منابع مشابه
Dayside ionospheric convection changes in response to longperiod interplanetary Magnetic field oscillations Determination of the ionospheric phase velocity
Ground magnetic field perturbations recorded by the CANOPUS magnetometer network in the 7 to 13 MLT sector are used to examine how reconfigurations of the dayside polar ionospheric How take place in response to north-south changes of the IMF. During the 6-hour interval in question IMF Bz oscillates between_+7 nT with about a 1-hour period. Corresponding variations in the ground magnetic disturb...
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[1] We use results from a global MHD simulation to study the interaction of an interplanetary shock with the Earth’s magnetosphere for a northward interplanetary magnetic field orientation. We connect intensifications of the transient northward Bz (NBZ) and Region 1 currents in the ionosphere with the appearance of two strong dynamo regions in the magnetosphere: the first on the high‐latitude m...
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[1] On 17 September 2000 the IMF was directed continuously northward for more than 3 hours. Density fluctuations in the solar wind resulted in quasiperiodic variations in the solar wind dynamic pressure, and correlated fluctuations also occurred in the IMF Bz component. The Northern Hemisphere SuperDARN radars observed bursts of highlatitude high-velocity plasma flow during this northward IMF i...
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Tracking the formation and full evolution of polar cap ionization patches in the polar ionosphere, we directly observe the full Dungey convection cycle for southward interplanetary magnetic field (IMF) conditions. This enables us to study how the Dungey cycle influences the patches’ evolution. The patches were initially segmented from the dayside storm enhanced density plume at the equatorward ...
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Interhemispheric contrasts in the ionospheric convection response to variations of the interplanetary magnetic ®eld (IMF) and substorm activity are examined, for an interval observed by the Polar AngloAmerican Conjugate Experiment (PACE) radar system between 1600 and 2100 MLT on 4 March 1992. Representations of the ionospheric convection pattern associated with dierent orientations and magnitu...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Space Physics
سال: 1997
ISSN: 0148-0227,2156-2202
DOI: 10.1029/97ja00940