Results 31 to 40 of about 203,115 (295)
Geophysical Research Letters, 2017 The nonlinear response of the cross polar cap potential (CPCP) to solar wind driving electric field is a well‐known phenomenon. The reasons behind this saturation, however, are still under debate.
M. Myllys, E. K. J. Kipua, B. Lavraud
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First energetic neutral atom images from Polar [PDF]
, 1997 Energetic neutral atoms are created when energetic magnetospheric ions undergo charge exchange with cold neutral atoms in the Earth\u27s tenuous extended atmosphere (the geocorona).
Blake, J. B. +6 more
core +3 more sources
Seasonal variations and north–south asymmetries in polar wind outflow due to solar illumination [PDF]
Annales Geophysicae, 2016 The cold ions (energy less than several tens of electronvolts) flowing out from the polar ionosphere, called the polar wind, are an important source of plasma for the magnetosphere.
L. Maes +3 more
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Multi-instrumentation observations of a transpolar arc in the northern hemisphere [PDF]
Annales Geophysicae, 2008 A transpolar arc was imaged by the FUV instrument on the IMAGE spacecraft during a 3-h interval on 5 February 2002. Observations indicate that a burst of reconnection in the geomagnetic tail, which was not associated with a substorm, was responsible ...
A. Goudarzi +3 more
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Polar cap voltage saturation [PDF]
Journal of Geophysical Research: Space Physics, 2006 Cross polar cap voltage saturation has been observed by various measurement techniques. An example of the saturation is shown in this paper and an explanation is proposed in terms of magnetospheric current behavior. The cross cap voltage saturation might be associated with either a voltage source or a current source effect since the cross cap potential
J. W. MacDougall, P. T. Jayachandran
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Substorms and polar cap convection: the 10 January 2004 interplanetary CME case [PDF]
Annales Geophysicae, 2012 The expansion-contraction model of Dungey cell plasma convection has two different convection sources, i.e. reconnections at the magnetopause and in the magnetotail.
Y. Andalsvik +2 more
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Empirical polar cap potentials [PDF]
Journal of Geophysical Research: Space Physics, 1997 DMSP satellite plasma flow data from 1987–1990 are used to derive empirical models of the polar cap potential for quasi‐steady interplanetary magnetic field (IMF) conditions. The large data set, due to the high duty cycle and nearly Sun synchronous DMSP orbits, allowed very stringent data selection criteria.
C. B. Boyle, P. H. Reiff, M. R. Hairston
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Interrelation between radio and X-ray signatures of drifting subpulses in pulsars
, 2006 We examined a model of partially screened gap region above the polar cap, in which the electron-positron plasma generated by sparking discharges coexists with thermionic flow ejected by the bombardment of the surface beneath these sparks.
Arons +22 more
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Sunward polar cap convection [PDF]
Journal of Geophysical Research: Space Physics, 2001 This is a study of the conditions for which there is sunward convection in the central polar cap. The study of convection direction uses digital ionosonde measurements from two central polar cap stations (Resolute Bay, corrected geomagnetic (CG) latitude 83.3°N, and Eureka, CG latitude 88.67°N) and presents statistical results about pure sunward ...
P. T. Jayachandran, J. W. MacDougall
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Space weather with an arc’s ∼2 h trip across the nightside polar cap
Frontiers in Astronomy and Space SciencesFlow channels can extend across the polar cap from the dayside to the nightside auroral oval, where they lead to localized reconnection and auroral oval disturbances.
Larry R. Lyons +8 more
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