Evidence for the resonator of inertial Alfvén waves in the cusp topside ionosphere

Details Evidence for the resonator of inertial Alfvén waves in the cusp topside ionosphere Evidence for the resonator of inertial Alfvén waves in the cusp topside ionosphere

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jgra..11007218h&link_type=abstract

Journal of Geophysical Research, Volume 110, Issue A7, CiteID A07218

Physics

4

Magnetospheric Physics: Magnetosphere/Ionosphere Interactions (2431), Magnetospheric Physics: Mhd Waves And Instabilities (2149, 6050, 7836), Magnetospheric Physics: Magnetopause And Boundary Layers, Magnetospheric Physics: Electric Fields (2411), Ionosphere: Wave Propagation (0689, 3285, 4275, 4455, 6934)

Scientific paper

Using Akebono satellite observations, we have examined the excitation mechanism of large-amplitude, electric and magnetic field variations in the vicinity of the cusp topside ionosphere. Three typical cusp events in the altitude range of ~2000 km, ~4000 km, and ~7500 km are investigated in detail. The phase-frequency relationship obtained from a wavelet analysis is compared with the theoretical one given by the Lysak 1991 model for each event to find the evidence for the existence of ionospheric Alfvén resonator (IAR). Also, the ratios of electric field to magnetic field variations are compared with theoretical values of inertial Alfvén waves to identify the existence of inertial Alfvén waves. The obtained results demonstrate the clear signature of the coexistence of IAR and inertial Alfvén waves in extended altitude range of the cusp topside ionosphere.

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