Geomagnetic storm effect on quasi-static electric field and meteorological quantities in the near-ground atmosphere

Smirnov S.E.1, Mikhailova G.A.2, Kapustina O.V.2
  1. Institute of Cosmophysical Researches and Radio Wave Propagation FEB RAS, Russia
  2. Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Waves Propagation RAS, Russia

   During geomagnetic disturbances the following effects has been determined:
   decrease of air electroconductivity is associated with the reduction of
   galactic cosmic ray flow, one of the main air ionizers; sudden storm
   beginning caused inductive effects in electric fields; on the following
   stages of a storm, a significant excess of positive particles appeared in
   the near ground air.

   Anomalous temperature and air humidity increase was discovered during
   solar activity development. Coincidence in time of regular meteorological
   process disturbances with the sequence of solar flares accompanied by
   radiation increase in ultraviolet close band, visible and infrared
   spectrum parts, allow us to consider them as a source of additional energy
   inflow to the lower atmosphere. Increase of electric field power spectrum
   intensity before a storm followed by a decrease on the storm day was
   discovered. Probably, these effects are associated with cosmic ray effects
   on global electric circuit current. It has been shown, that in electric
   field power spectrum, Forbush effect also manifests itself in component
   increase with the period of 48 h.