Currently, there is an increased interest in the study of the ecological state of environmental objects in the Arctic territories. The study of soils and soil cover in such studies occupies an important place. Permafrost is a very special, is still poorly understood biological system that is different for a number of properties from the others. They are characterized by a high mosaic and uneven profile, significant compaction, acidic reaction of the medium and a special pattern of distribution of pollutants. A profile approach was applied to the study of the chemical composition of Arctic soils. This made it possible to determine the median and deep above-ground values of the accumulation of priority inorganic toxicants and other heavy metals. The distribution of heavy metals in the profile is associated with the development of two groups of soil processes: eluvial-illuvial and cryogenic mass transfer. As a result of eluvial-illuvial processes, some heavy metals are redistributed along with the profile and accumulate in the middle part of the profile. Meanwhile, in tundra soils, the dominant processes are cryogenic mass transfer, which leads to a strong mixing of the soil layer and the accumulation of certain chemical components in the permafrost or permafrost-gley horizon. This is the main reason for the second jump in the content of heavy metals in the lower part of the soil profiles. In the study area, the content of chemical elements in the soil is lower in comparison with the literature data, background concentrations in Yamal and standard indicators.
Therefore, the results obtained can be used as background concentrations of the heavy metals to be determined. Patterns of changes in the concentration of heavy metals and petroleum products their distribution over the soil profile in the conditions of the region are determined by the composition of soil-forming rocks, soil formation processes, soil properties and the level of anthropogenic influences. The main physical and chemical properties of tundra soils on undisturbed landscapes are determined.
|Publication||IOP Conference Series: Earth and Environmental Science|
|Affiliation of speaker||ITMO University|
|Position of speaker||PhD student|