The response of thunderstorm VLF radio noise to solar activity according to observations in Yakutsk |
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| Authors: | V I Kozlov V A Mullayarov R R Karimov |
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| Institution: | (1) Indian Institute of Tropical Meteorology, Pune, 411 008, India;(2) Department of Physics, Banaras Hindu University, Varanasi, 211 005, India;(3) Physics Department, Lucknow University, Lucknow, 226 007, India |
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| Abstract: | The relation between the long-term variations in the thunderstorm VLF radio noise intensity and solar activity in 1979–2006
has been studied. The sunspot number (the Wolf number) was used as a parameter characterizing solar activity. The intensity
of VLF noise registered in Yakutsk characterizes thunderstorm activity in Eastern Siberia (0100–0500 UT) and in the African
thunderstorm center (1300–1700 UT). Using the results of a correlation analysis, it has been found that thunderstorm activity
in Eastern Siberia and in the African world centre is in antiphase with a change in the sunspot number. The highest anticorrelation
coefficients between solar activity and thunderstorm discharge intensity were obtained for thunderstorms in Eastern Siberia.
In this case the maximal correlation coefficients (R = −0.59 and −0.75) were obtained for the average monthly values of the VLF radio noise intensity in August, measured at 0400
UT and 1600 UT, respectively. |
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