Winter background aerosol deposition in the south-eastern part of Western Siberia
Yu.V. Ermolov, N.B. Smolentsev
Institute of Soil Science and Agrochemistry of the Siberian Branch of the Russian Academy of Science, Novosibirsk, Russia
Keywords: снеговой покров, примеси снега, аэрозоль, фоновое поступление, юго-восток Западной Сибири, snow, sedimentation of air impurities, aerosol background, Western Siberia
Abstract
We show that snow from the ice surface of lakes in oligotrophic bogs is suitable for monitoring the deposition of "long-distant" aerosol. Based on the concentration of impurities in snow samples from the plains of Baraba and Vasyugan, we estimated the background of winter deposition of aerosol substances in southeast of Western Siberia. It was found that the deposition of aerosol particles per day is about 7 mg/m2, including 3.1 mg/m2 in the form of solid particles. Winter deposition of particulate matter does not exceed 10% of annual deposition; therefore, it has almost no effect on sedimentation. The mineral substance prevails in solid impurities of snow, the average ash content is 65%. The background mineralization of snow water from the ice surface of oligotrophic bog lakes in the southeast of Western Siberia is close to the global background of precipitation mineralization.
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