Physics – Plasma Physics
Scientific paper
Nov 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.3365i&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 22, p. 3365-3368
Physics
Plasma Physics
27
Ionosphere: Auroral Ionosphere, Ionosphere: Ionospheric Dynamics, Space Plasma Physics: Waves And Instabilities
Scientific paper
The Auroral Turbulence II (AT2) sounding rocket carried three payloads into the auroral ionosphere where they crossed several arc structures. At the border of an auroral arc a quasiperiodic structure was observed by the magnetic and electric field instruments as well as by the particle detectors. The variations were temporal oscillations, but existed only in a narrow (~7 km) region transverse to the arc, with a correlation length along the arc of at least several km. The relation between the electric and magnetic field amplitude indicates the Alfvénic nature of the variations. Field aligned electron precipitation is correlated to the field variations. The narrow band nature of the oscillations and frequency around 0.6 Hz is consistent with waves confined in the ionospheric Alfvén resonator.
Ivchenko Nickolay
Lynch Kristina
Marklund Göran
Pietrowski David
Primdahl Fritz
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