09 May 2021. Long term monitoring of SR from Antarctica; Conference-delivered Research paper
3309 May 2021. Long-term monitoring of the Schumann resonance signals from Antarctica, Koloskov, Budanov, Yampolski
(Actual material content starts at 10:40)
Abstract
In the paper, long-term data sets of the Schumann resonance (SR) signals observed at the Ukrainian Antarctic Station (UAS) are analyzed.
It has been found that the long-time trends of the peak frequencies and intensity of the fundamental SR mode correlate with 11-year solar cycle.
No trend of yearly averaged numbers of lightning flashes is observed in LIS satellite data for the same period.
It is suggested that the long-term variations of the intensity and frequency of SR peaks were caused by changes in the ionosphere controlled by solar activity.
1. Introduction
As is known, Schumann resonances (SR) are stimulated by global lightning activity.
Lightning discharges excite resonance signals in the cavity formed by the Earth surface and the lower boundary of the ionosphere [1, 2].
As was shown in the paper [3], long-term records of the intensity of the fundamental harmonic of SR signals can be used to monitor trends in the tropical surface air temperature. However, the mechanism of the lightning activity-global temperature coupling has not been well-described theoretically. Long-term high accuracy observations of Schumann signals can be helpful for experimental study of this effect.
To the best author’s knowledge, there are only few papers [4, 5] reporting on records of the kind.
An important issue while processing SR data is to isolate signals produced by the global lightning activity from interference radiation produced by local lightning discharges and technogenic sources, which can significantly deteriorate quality of the data.
As is suggested in paper [6], the best location for a Schumann observatory is the polar region owing to the absence of local lightning and technogenic activities.
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Source link: (https://www.researchgate.net/publication/266114664_Long-term_monitoring_of_the_Schumann_resonance_signals_from_Antarctica)
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