The paper presents the results of the microscopic analysis of solid precipitation (snow) sampled from three key areas located in neighboring nival-glacial systems at the beginning of the cold period in 2019-2020 (November, December). Pollen of Pinus sp., Betula sp. belonging to Asteraceae, Chenopodiaceae, Poaceae families was found in the snow samples. The samples collected simultaneously from three key area on December 7, 2019 displayed 4 taxa out of 5 identified during the entire analyzed period as well as territories which pollen could be transferred from were identified. According to the backward air-mass trajectories calculation (HYSPLIT model), the analysis of constant pressure maps and snow distribution maps, these territories were located to the south of the key testing sites.
To assess the possibility of atmospheric supply of microplastics in the south of Western Siberia, integrated snow cover samples at two test sites were taken. In this study, snow cover was considered as an accumulator of atmospheric precipitation during the cold period. The use of Scanning Electron Microscope (SEM S-3400N Hitachi Science Systems Ltd, Japan) allowed to visually detect particles and fibers in the obtained samples that were previously identified as microplastics. To confirm that the detected particles are microplastics, the elemental composition of the same samples was analyzed using energy-dispersive spectrometry for the scanning electron microscope (XFlash 4010, Bruker AXS Microanalysis GmbH, Germany). This method also showed that the detected particles and fibers are microplastics.
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