Variations in the Geophysical Characteristics of the Surface Atmosphere During the Passage of Cumulonimbus Clouds: Pt. 1. Results of Observations

The results of synchronous observations of meteorological characteristics of the atmosphere, microbaric variations, variations of electric and magnetic fields, the atmospheric current, and the concentrations of fine particles at surface layer during the passage of cumulonimbus clouds are presented. Instrumental observations were carried out at the Mikhnevo Geophysical Observatory and at the Center for Geophysical Monitoring in Moscow of the Sadovsky Institute of Geosphere Dynamics of the Russian Academy of Sciences. Based on the results of instrumental observations, it is shown that during the passage of cumulonimbus calvus clouds of convective origin, along with a drop in temperature, an increase in air humidity and a decrease in solar radiation power, increased amplitudes of microbaric variations, changes in the electrical characteristics of the atmosphere, variations in the magnetic field, as well as an increase in the concentration of fine particles are observed in the surface layer of the atmosphere.