MODELING OF INFLUENCE OF METEOR SHOWERS ON THE FORMATION OF SPACE ORIGIN AEROSOL ALTITUDINAL DENSITY PROFILES IN UPPER ATMOSPHERE

The model of space-origin aerosol formation in the atmosphere from meteor streams is proposed. The components of the model are the physical and kinematic parameters of the meteor shower, characteristics of the atmosphere, and the base equations of meteor physics: the equation of deceleration and the equation of energetic balance. The input parameters of a meteor shower are considered to be the meteor stream heliocentric orbit elements, the distribution of meteors by masses across and along the meteor stream, and the physical properties of meteoroids. For meteors of the sporadic background, the meteoroid influx was formed by a three-dimensional distribution: by masses of cosmic particles, their pre-atmospheric velocities, and radiant zenith angles. In the case of a meteor stream, just the radiant zenith angle, which is a function of time, plays a key role. The velocity of a meteor shower is obviously constant (statistical scattering can be neglected). The distribution by masses, which is described by the Pareto distribution, remains in the final equation of the aerosol density change dn/dt(t). However, at the same time, the meteor influx modification caused by the diurnal radiant’s zenith angle variation results in a shift of the distribution’s right tail, i.e., the maximal mass value of the space particle, which still remains an aerosol, not transforming into a meteor. It is shown that the influx of cosmic substances through a unit mesosphere area at an altitude of 100 km creates the altitudinal aerosol profile in the atmosphere from a meteor shower. This influx varies based on the geographic position of the area, meaning it depends on geographic coordinates.Besides, the substance influx into a fixed place of the atmosphere periodically changes during the day. It is clearly demonstrated that some meteor showers do not influence some parts of the planet since their radiants do not arise above the horizon and, accordingly, do not form an aerosol. After atmospheric selection of meteoroids into aerosols and meteors, the heights of stop (complete loss of the space velocity) of the aerosol particles, finally forming the altitudinal profile density dn/dt from the given meteor shower,are calculated. For obviousness, the results of all calculations are demonstrated for the Perseid meteor shower and Kyiv latitude.