Mathematics – Probability
Scientific paper
Aug 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30pas10s&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 16, pp. ASC 10-1, CiteID 1859, DOI 10.1029/2003GL017291
Mathematics
Probability
19
Meteorology And Atmospheric Dynamics: Lightning, Radio Science: Remote Sensing, Global Change: Remote Sensing, Electromagnetics: Guided Waves
Scientific paper
We estimated locations and rates of sprite occurrences on a global scale using 1-100 Hz ELF magnetic field waveform data obtained at Syowa station in Antarctica and Onagawa observatory in Japan. From the ELF data obtained in a period between June 19, 2001 and January 20, 2002, we identified 715,500 events of transient Schumann resonances (SRs). The locations and polarizations of these parent cloud-to-ground (CG) discharges were determined by a triangulation method. The charge moments of these CG discharges were calculated with a normal mode expansion model of SR waves. From these results and the empirical sprite initiation probability reported by Hu et al. [2002], the global occurrence rate of sprites is estimated to be about 720 events/day on average. It is also found that the active regions of sprite occurrences are located in North and South America, Africa and South-East Asia.
Fukunishi Hiroshi
Sato Mitsuteru
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