Distribution of Global Fallouts Cesium-137 in Taiga and Tundra Catenae at the Ob River Basin

Semenkov, I.N.; Usacheva, A.A.; Miroshnikov, A.Y.

Авторы: Semenkov I.N., Usacheva A.A., Miroshnikov A.Yu
Журнал: Geology of Ore Deposits
Том: 57
Номер: 2
Год издания: 2015
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 138
Последняя страница: 155
Оригинальные версии: Распределение цезия-137 глобальных выпадений в таежных и тундровых катенах бассейна реки Обь
DOI: 10.1134/S1075701515010055
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,
Добавил в систему: Семенков Иван Николаевич

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Distribution of Global Fallouts Cesium-137 in Taiga and Tundra Catenae at the Ob River Basinстатья Перевод

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