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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 16, issue 2
Ann. Geophys., 16, 183–188, 1998
https://doi.org/10.1007/s00585-998-0183-x
© European Geosciences Union 1998
Ann. Geophys., 16, 183–188, 1998
https://doi.org/10.1007/s00585-998-0183-x
© European Geosciences Union 1998

  28 Feb 1998

28 Feb 1998

Long-period fading in atmospherics during severe meteorological activity and associated solar geophysical phenomena at low latitudes

A. B. Bhattacharya1, S. K. Kar1, M. K. Chatterjee*,1, and R. Bhattacharya2 A. B. Bhattacharya et al.
  • 1Department of Physics, University of Kalyani, Kalyani, Nadia, 741 235, India
  • 2Centre of Advanced Study in Radio Physics & Electronics, Calcutta University, Calcutta, 700 009, India
  • *Currently at: Department of Physics, Serampore College,
  • Correspondence to: A. B. Bhattacharya

Abstract. The records of VLF atmospherics over Calcutta and then over Kalyani (West Bengal) during the torrential rainfall, caused by violent monsoon and post-monsoon depressions, exhibit distinct long-period fadings both at day and night. Interesting results obtained from an analysis of round-the-clock atmospherics data and associated meteorological parameters are reported in this paper. A possible correlation between the severe meteorological activity with the solar geophysical phenomena was studied. The results are indicative of an interesting sequence of solar-terrestrial events. A tentative conclusion is reached, suggesting an origin of the fading from atmospheric gravity waves generated in the centre of activity of the depressions concerned.

Key words. Meteorology and atmospheric dynamics · Lightning · Precipitation

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