Geophysical processes and biosphere: article

Аnnotation: We present the results of synchronous observations of microbaric oscillations, variations of electric and magnetic fields during large fires of technogenic origin in Moscow. The main instrumental observations were carried out at the Center for Geophysical Monitoring in Moscow of Sadovsky Institute of Geosphere Dynamics of the Russian Academy of Sciences. Using the analysis of the data obtained, we show that large fires in a megalopolis are manifested in microbaric variations, variations of the electric and geomagnetic fields in the surface atmosphere. Under certain conditions (the absence of intense natural movements of air masses, sufficiently strong heating of the atmosphere in the combustion source), fires can lead to an increase in wind speed and direction in an area up to 25 km. The emergence of a dynamic region with altered thermodynamic characteristics above the fire zone causes the formation of infrasonic waves during the period of the most intense combustion. Strong fires lead to an increase in the concentration of fine particles in the surface atmosphere.