Ohmic heating as evidence for strong field-aligned currents in filamentary aurora
نویسندگان
چکیده
منابع مشابه
Filamentary field-aligned currents at the polar cap region during northward interplanetary magnetic field derived with the Swarm constellation
ESA's Swarm constellation mission makes it possible for the first time to determine field-aligned currents (FACs) in the ionosphere uniquely. In particular at high latitudes, the dual-satellite approach can reliably detect some FAC structures which are missed by the traditional single-satellite technique. These FAC events occur preferentially poleward of the auroral oval and during times of nor...
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We report on field-aligned currents (FAC) obtained from precise magnetic field measurements made onboard the Orsted and Magsat satellites when the interplanetary magnetic field (IMF) was near zero. We found that Region 1/Region 2 currents persist through southward IMF, IMF -• 0, and northward IMF; also the central area of both the northern and southern polar caps is always filled with FACs, eve...
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Bursts of very intense kilometer-scale fieldaligned currents (KSFACs) are observed quite frequently by the CHAMP satellite when passing through the auroral region. In extreme cases estimated current densities exceed 3 mA/m2. Typical scale sizes of these KSFACs are 1 km. The low-Earth, polar orbiting satellite CHAMP allows one to assess KSFACs down to scales of a couple of 100 m based on its hig...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Space Physics
سال: 2001
ISSN: 0148-0227
DOI: 10.1029/1999ja000292