Measuring the dayside reconnection rate during an interval of due northward interplanetary magnetic field [PDF]
Annales Geophysicae, 2004 This study presents, for the first time, detailed spatiotemporal measurements of the reconnection electric field in the Northern Hemisphere ionosphere during an extended interval of northward interplanetary magnetic field.
G. Chisham +6 more
doaj +1 more source
Ionospheric convection response to changing IMF direction
Geophysical Research Letters, 1991 By combining ground‐based and satellite‐based measurements of ionospheric electric fields, conductivities and magnetic perturbations, we are able to examine the characteristics of instantaneous, ionospheric convection patterns associated with changing directions of the Interplanetary Magnetic Field (IMF).
D. J. Knipp +6 more
openaire +1 more source
Space weather challenges of the polar cap ionosphere [PDF]
, 2016 This paper presents research on polar cap ionosphere space weather phenomena conducted during the European Cooperation in Science and Technology (COST) action ES0803 from 2008 to 2012.
Alfonsi, Lucilla +5 more
core +4 more sources
The Nightside Ionosphere: Ionospheric Convection during an Isolated Substorm on October 21, 1981
Journal of geomagnetism and geoelectricity, 1996 Substorms can occur in series such as during a geomagnetic storm or as isolated events. We have chosen an isolated substorm from the Dynamics Explorer-2 (DE-2) database and use the Expanding/Contracting Polar Cap Model to study the substorm-related ionospheric electric fields and polar cap dynamics.
J. J. Moses, R. A. Heelis
openaire +2 more sources
Comparison of ionospheric electric currents and plasma convection patterns observed during substorms [PDF]
, 2000 . The effect of magnetospheric substorms on the global ionospheric convection pattern is widely debated. Discussed here, is a study made of ionospheric electric currents, co-incident with plasma convection at the time of substorm onset, using the HF ...
Cowley, S. W. H. +2 more
core +1 more source
GPS scintillations associated with cusp dynamics and polar cap patches [PDF]
, 2017 This paper investigates the relative scintillation level associated with cusp dynamics (including precipitation, flow shears, etc.) with and without the formation of polar cap patches around the cusp inflow region by the EISCAT Svalbard radar (ESR) and ...
Clausen, Lasse B. N. +5 more
core +3 more sources
Mapping of the quasi-periodic oscillations at the flank magnetopause into the ionosphere [PDF]
Annales Geophysicae, 2013 We have estimated the ionospheric location, area, and travel time of quasi-periodic oscillations originating from the magnetospheric flanks. This was accomplished by utilizing global and local MHD models and Tsyganenko semi-empirical magnetic field ...
E. R. Dougal +3 more
doaj +1 more source
Toward resolving small‐scale structures in ionospheric convection from SuperDARN [PDF]
Radio Science, 1999 The combination of radial velocities measured by a pair of Super Dual Auroral Radar Network (SuperDARN) HF coherent radars gives, in their common field of view, the velocity vectors in a plane perpendicular to the magnetic field. The standard merging is based on a natural grid defined by the beam intersections, which provides a resolution varying ...
André, R. +6 more
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Plasma flows, Birkeland currents and auroral forms in relation to the Svalgaard-Mansurov effect [PDF]
Annales Geophysicae, 2012 The traditional explanation of the polar cap magnetic deflections, referred to as the Svalgaard-Mansurov effect, is in terms of currents associated with ionospheric flow resulting from the release of magnetic tension on newly open magnetic field ...
P. E. Sandholt, C. J. Farrugia
doaj +1 more source
Convection vortex at dayside of high latitude ionosphere
Physics and Chemistry of the Earth, 1997 Abstract Investigation of mesoscale convection in the dayside sector by SuperDARN radars has revealed the existence in afternoon sector a convection vortex whose location, intensity and convection direction coincide with the polar cap geomagnetic disturbances (DPC), which is reviewed thoroughly.
I.I. Alexeev +2 more
openaire +1 more source