Sprite-attributed infrasonic chirps—their detection, occurrence and properties between 1994 and 2004

Details Sprite-attributed infrasonic chirps—their detection, occurrence and properties between 1994 and 2004 Sprite-attributed infrasonic chirps—their detection, occurrence and properties between 1994 and 2004

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jastp..68.1179l&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 68, Issue 11, p. 1179-1188.

Physics

12

Scientific paper

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 [Liszka, L., 2004. On the possible infrasound generation by sprites, Journal of Low Frequency Noise, Vibration and Active Control 23, 85 93]. A method for automatic detection of chirps in the recorded data has been developed and applied to 10 years of data from two arrays belonging to the SIN: Jamton and Lycksele. The temporal and directional distribution of the phenomenon is described. Also, long-term variability and possible relation to the solar cycle is studied.

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