Distribution of Global Fallouts Cesium-137 in Taiga and Tundra Catenae at the Ob River BasinстатьяПеревод
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 9 июля 2015 г.
Аннотация:The classification of soil catenae at the Ob River basin is developed and applied. This classification
reflects the diverse geochemical conditions that led to the formation of certain soil bodies, their combinations
and the migration fields of chemical elements. The soil and geochemical diversity of the Ob River basin cat
enae was analyzed. The vertical and lateral distribution of global fallouts cesium137 was studied using the
example of the four most common catenae types in Western Siberia tundra and taiga. In landscapes of dwarf
birches and dark coniferous forests on gleysols, cryosols, podzols, and cryicstagnosols, the highest 137Cs
activity density and specific activity are characteristic of the upper soil layer of over 30% ash, while the moss–
grass–shrub cover is characterized by low 137Cs activity density and specific activity. In landscapes of dwarf
birches and pine woods on podzols, the maximum specific activity of cesium137 is typical for moss–grass–
shrub cover, while the maximum reserves are concentrated in the upper soil layer of over 30% ash. Bog land
scapes and moss–grass–shrub cover are characterized by a minimum activity of 137Cs, and its reserves in soil
generally decrease exponentially with depth. The cesium137 penetration depth increases in oligotrophic his
tosols from northern to middle taiga landscapes from 10–15 to 40 cm. 137Cs is accumulated in oligotrophic
histosols for increases in pH from 3.3 to 4.0 and in concretionary interlayers of pisoplinthiccryichisticstagnosols.
Cryogenic movement, on the one hand, leads to burying organic layers enriched in 137Cs and,