Physics
Scientific paper
Oct 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2411f&link_type=abstract
Geophysical Research Letters, Volume 24, Issue 19, p. 2411-2414
Physics
29
Meteorology And Atmospheric Dynamics: Lightning, Meteorology And Atmospheric Dynamics: Climatology
Scientific paper
We report characteristics of global lightning activity on a seasonal time scale as inferred from two independently operating instruments measuring magnetic field variations in the lower ELF range. In this picture, the strongest source of lightning activity is centered on the North American continent. We reduce the source proximity effect to the observing sites experimentally with a simple differential technique and reconfirm the conclusion of Holzer and Deal (1956) that wave propagation conditions in the lower ELF range are of minor importance. The resulting mean seasonal variations of continental lightning in mid- and tropical latitudes are found to be related to surface temperature variations in moderate- and tropical rain forest climates and they support the view of Williams (1992) that monitoring of global lightning activity may provide a thermometer-independent measure of temperature changes associated with climate variability.
Fraser-Smith Anthony C.
Fullekrug Martin
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