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| Titel |
Period and damping factor of Pi2 pulsations during oscillatory flow braking in the magnetotail |
| VerfasserIn |
Evgeny V. Panov, Wolfgang Baumjohann, Rumi Nakamura, Marina V. Kubyshkina, Karl-Heinz Glassmeier, Vassilis Angelopoulos, Antoli A. Petrukovich, Victor A. Sergeev |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250088065
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| Publikation (Nr.) |
 EGU/EGU2014-2139.pdf |
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| Zusammenfassung |
| Using 25 observations of damped oscillatory flow behavior in the near-Earth plasma sheet by
the THEMIS probes during the 2008-2009 magnetotail seasons, we compare the oscillation
period and the damping factor of the plasma sheet flows with those of the Pi2 magnetic
pulsations on the ground at auroral and mid-latitudes near the local time of the conjugate
ionospheric THEMIS footprints. Whereas the damping of the plasma sheet flows and of
the pulsations on the ground occurs on the same time scales, the frequency of the
pulsations is on average twice the frequency of the plasma sheet flows. We conclude that
larger-amplitude ground pulsations at auroral latitudes were caused by the oscillatory flow
braking in the plasma sheet, presumably through alternating field-aligned currents. |
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