The splitting effect of the mode structure of the ionospheric alfven resonator

1Baru, NA, 1Koloskov, AV, 1Yampolski, Yu.M
1Institute of Radio Astronomy of the National Academy of Sciences of Ukraine, Kharkiv, Ukraine
Kosm. nauka tehnol. 2015, 21 ;(1):58–63
Publication Language: Russian

We analyze the data of continues observations of ionospheric Alfven resonance (IAR) which were carried out since 2010 until 2013 at the Ukrainian Antarctic Station “Academic Vernadskiy” and at the Sayan Solar Observatory (Mondy, Russia). The behavior of IAR fine spectral structure is studied and previously unknown effect of the splitting of several lowest resonance modes is found. Diurnal and seasonal regularities of the observability of this effect as well as its dependence on the phase of the eleven-year cycle of solar activity are investigated. The morphological features of the frequency splitting behavior are analyzed and its main phases as development, stationary section and relaxation are identified. Possible mechanisms of the occurrence of splitting effect are suggested.

Keywords: ionospheric alfven resonator, magnetic field, magnetohydrodynamic waves, splitting effect

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