Results 171 to 180 of about 9,187 (202)

Mapping ionospheric convection patterns to the magnetosphere

Journal of Geophysical Research: Space Physics, 1995
While convection patterns in the high‐latitude ionosphere are usually presented in a corotating frame of reference, those of the magnetosphere are given in inertial coordinates. In the corotating representation the convection throat, which is frequently associated with the cusp, opens between 1000 and 1100 MLT.
Nelson C. Maynard, William F. Denig, William J. Burke   +2 more
openaire   +1 more source

Ionospheric convection signatures and magnetic field topology

Journal of Geophysical Research: Space Physics, 1987
We present here a statistical study of signatures of the high‐latitude ionospheric convection pattern and the simultaneously observed energetic electron precipitation. We most often find convection cells in which the sunward flowing region contains auroral particle precipitation but the antisunward flowing region does not.
W. R. Coley, R. A. Heelis, W. B. Hanson, P. H. Reiff, J. R. Sharber, J. D. Winningham   +5 more
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Interhemispheric asymmetry of the high‐latitude ionospheric convection pattern

Journal of Geophysical Research: Space Physics, 1994
The assimilative mapping of ionospheric electrodynamics technique has been used to derive the large‐scale high‐latitude ionospheric convection patterns simultaneously in both northern and southern hemispheres during the period of January 27‐29, 1992. When the interplanetary magnetic field (IMF) Bz component is negative, the convection patterns in the ...
Lu, G., Richmond, A. D., Emery, B. A., Reiff, P. H., de la Beaujardière, O., Rich, F. J., Denig, W. F., Kroehl, H. W., Lyons, L. R., Ruohoniemi, J. M., Friis-Christensen, E., Opgenoorth, H., Persson, M. A. L., Lepping, R. P., Rodger, A. S., Hughes, T., McEwin, A., Dennis, S., Morris, R., Burns, G., Tomlinson, L.   +20 more
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The relationship between ionospheric convection and magnetic activity

Journal of Geophysical Research: Space Physics, 1994
In this paper we show that there is a significant relationship between magnetic activity and the high‐latitude ionospheric convection electric fields. In particular, when the westward electrojet is much stronger than the eastward electrojet, as occurs during magnetospheric substorms, the electric field patterns show subtle, but important, changes from ...
J. ‐H. Shue, D. R. Weimer
openaire   +1 more source

Solar wind effects on ionospheric convection: a review

Journal of Atmospheric and Solar-Terrestrial Physics, 2002
The solar wind, magnetosphere, and ionosphere are intrinsically coupled through magnetic field lines. The electrodynamic state of the high-latitude ionosphere is controlled by several geophysical processes, such as the location and rate of magnetic reconnection at the magnetopause and in the magnetotail, and the energisation and precipitation of solar ...
G. Lu, S.W.H. Cowley, S.E. Milan, D.G. Sibeck, R.A. Greenwald, T. Moretto   +5 more
openaire   +1 more source

Atmosphere-ionosphere coupling from convectively generated gravity waves

Advances in Space Research, 2018
Abstract Ionospheric variability impacts operational performances of a variety of technological systems, such as HF communication, Global Positioning System (GPS) navigation, and radar surveillance. The ionosphere is not only perturbed by geomagnetic inputs but is also influenced by atmospheric tides and other wave disturbances propagating from the ...
Irfan Azeem, Michael Barlage
openaire   +1 more source

Magnetosphere‐Ionosphere Convection Under the Due Northward IMF

Journal of Geophysical Research: Space Physics, 2019
AbstractConvection under the due northward interplanetary magnetic field (IMF) is reproduced by the global simulation. The resulting magnetosphere is closed except in the XZ plane and separated from the solar wind by the separatrix generated from cusp nulls.
T. Tanaka, T. Obara, M. Watanabe, S. Fujita, Y. Ebihara, R. Kataoka, M. Den   +6 more
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The relationship between magnetospheric convection and ionospheric heating

Journal of Geophysical Research: Space Physics, 1994
Treating the magnetic stress introduced into the magnetosphere by the solar wind at the magnetopause, we show the direct relation between the magnetospheric convection pattern and the field perturbations. The Birkeland currents are caused by the field perturbations and follow directly from Ampere's law, of course.
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Tropical convection, ionospheric potentials and global circuit variation

Nature, 1986
The ionospheric potential (VI), a measure of the earth's overall electric field intensity, correlates with the classic 'Carnegie curve' diurnal variation in electric field caused by the global distribution of thunderstorms. A comparison of VI variation with satellite images of high tropical cloud fields indicates that equatorial thunderstorms over the ...
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Ionospheric convection and its relevance for space weather

Advances in Space Research, 2003
Abstract Ionospheric convection is a manifestation of the coupling between the solar wind and the magnetosphere. Observations of convection can, therefore, provide information on the efficiency of that coupling and the subsequent energy transfer from the solar wind to the magnetosphere and ionosphere.
openaire   +1 more source