METHOD OF MEASURING CONCENTRATION OF AEROSOL PARTICLES IN THE ATMOSPHERE

摘要

FIELD: meteorology.;SUBSTANCE: invention relates to the field of meteorology, and more specifically to methods for determining characteristics of atmospheric pollution, and can be used, for example, to measure transparency of the atmosphere when determining aerosol air pollution. Method of measuring the concentration of aerosol particles in the atmosphere, including the registration of the luminous flux scattered on these particles, differs in that it previously, on the basis of the Umov effect, then the calibration dependence between the maximum value of degree of linear polarization of the solar radiation of an aerosol scattered on particles and their reflectivity is generated in form of a log(P_max) ∝ log(A), where P_max – the maximum value of the degree of linear polarization of the solar radiation of the aerosol scattered on the particles, A – the reflectivity of the aerosol particles. In this case, measurements are carried out in the evening or morning twilight, continuously, when the sun is not visible from behind the horizon and the Earth casts a shadow on the atmosphere above the location of the measuring device, which is used as a polarimeter, which during measurements is oriented to the zenith, and synchronously with measurements of the degree of linear polarization of solar radiation, the angles between the horizon and the direction to the upper edge of the sun are fixed, which calculate the height of the shadow corresponding to a specific measurement, and identify the dependence of the degree of linear polarization of the scattered solar radiation from the height, which, using the calibration dependence, is interpreted as dependence of reflectivity of aerosol particles on height, with which they estimate the volumetric concentration of dust particles in the atmosphere. After measuring the degree of linear polarization of the scattered solar radiation, high-precision lidar measurements of the flux of reflected laser radiation from atmospheric aerosols are carried out at the same altitudes, where measurements were made using a polarimeter, after which an estimate of volume concentration of dust particles in atmospheric layers is obtained as the ratio of the measured flux of reflected lidar radiation to the geometric albedo derived from polarimetric measurements.;EFFECT: increase in reliability of the results of measurements of aerosol air pollution and ensuring possibility of its rapid determination at various heights without the use of additional complex technical means.;5 cl, 5 dwg