HR: 1340h
AN: AE23A-0997    [Abstracts]
TI: Sprite-attributed infrasonic chirps, their detection, occurrence and properties between 1994 and 2004
AU: * Liszka, L J
EM: ludwik@irf.se
AF: Swedish Institute of Space Physics, Teknikhuset, Umea, AC 90187 Sweden
AU: Hobara, Y
EM: yasu@irf.se
AF: Swedish Institute of Space Physics, Box 812, Kiruna, BD 98128 Sweden
AB: During the last 10 years, infrasonic chirps in the frequency range 0.5 - 8 Hz were occasionally observed by arrays belonging to the Swedish Infrasonic Network (SIN). These chirps have been attributed to certain types of thunderstorm activity associated with the high altitude discharges, sprites. A method for automatic detection of chirps in the recorded data has been developed and applied to 10 years of data from all arrays belonging to the SIN. The temporal and directional distribution of the phenomenon is described. Also, long-term variability and possible relation to the solar cycle is studied.
DE: 2427 Ionosphere/atmosphere interactions (0335)
DE: 3304 Atmospheric electricity
DE: 3324 Lightning
SC: Atmospheric and Space Electricity [AE]
MN: Fall Meeting 2005