The period of highest fire activity (August 2017) by the radiation power and the number of fires for the period since 2007 to 2019 was revealed. Based on image processing techniques in the infrared range (on a 4 μm channel) according to MODIS and VIIRS data the statistical analysis of fire data was carried out and variations in the radiation power from fires were studied. The main optical and microphysical characteristics of the atmospheric aerosol for the periods with the largest number of fires for the Black Sea region were analyzed. A comprehensive analysis of the main optical characteristics variability and precipitation samples for periods of special fire activity was carried out. Considering that nitrogen oxides enter the atmosphere as a result of combustion processes, an analysis of atmospheric precipitation samples for the content of nitrates for days with the maximum number of thermoactive points according to satellite data was carried out in order to identify a possible correlation.
A comprehensive analysis of data on the content of PO43- and SiO32- in the atmospheric precipitation, collected in Sevastopol, with the data of back trajectories of HYSPLIT and AERONET models, as well as aerosol optical depth (AOD) was carried out. It has been found that the days with increased concentrations of PO43- and SiO32- coincide with the dates of transfer of the dust aerosol from the Sahara desert. The concentration of inorganic phosphorus and silicon in the precipitations in these cases may increase in several times as compared with their volume-weighted mean concentrations.
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