Non-stationary Alfven resonator: vertical profiles of wave characteristics

A Pc1/IPDP event recorded by the Finnish search coil magnetometers on 15 De cember 1984 was analyzed in a companion paper (Mursula et al., 2000. Non-st ationary Alfven resonator: new results on Pc1 pearls and IPDP events. J. At mos. Solar-Terr. Phys. 62(4), 299-309) using numerical simulations of the i onospheric Alfven resonator (IAR). EISCAT incoherent scatter radar data wer e used to determine the vertical profiles of ionospheric plasma parameters. In this paper, the detailed altitude profiles of several wave characterist ics at the IAR eigenfrequency are computed up to 1000 km height, including, e.g., the real normalized amplitude of the magnetic wave field component, ellipticity and orientation of the polarization ellipse in the horizontal p lane. We also calculate the altitude profile of the energy flux density (Po ynting vector). These features illustrate in detail the ionospheric effects on the wave spectral structure in a non-stationary IAR, and their signific ance in the formation of the Pc1/IPDP signal on the ground. (C) 2000 Elsevi er Science Ltd. All rights reserved.