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| Titel |
Trace metal distribution in pristine permafrost-affected soils of the Lena River delta and its hinterland, northern Siberia, Russia |
| VerfasserIn |
I. Antcibor, A. Eschenbach, S. Zubrzycki, L. Kutzbach, D. Bolshiyanov, E.-M. Pfeiffer |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 11, no. 1 ; Nr. 11, no. 1 (2014-01-02), S.1-15 |
| Datensatznummer |
250117101
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| Publikation (Nr.) |
 copernicus.org/bg-11-1-2014.pdf |
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| Zusammenfassung |
| Soils are an important compartment of ecosystems and have the ability to
buffer and immobilize substances of natural and anthropogenic origin to
prevent their movement to other environment compartments. Predicted climatic
changes together with other anthropogenic influences on Arctic terrestrial
environments may affect biogeochemical processes enhancing leaching and
migration of trace elements in permafrost-affected soils. This is especially
important since Arctic ecosystems are considered to be highly sensitive to
climatic changes as well as to chemical contamination. This study
characterises background levels of trace metals in permafrost-affected soils
of the Lena River delta and its hinterland in northern Siberia
(73.5–69.5° N), representing a remote region far from evident
anthropogenic trace metal sources. Investigations on the element content of
iron (Fe), arsenic (As), manganese (Mn), zinc (Zn), nickel (Ni), copper (Cu),
lead (Pb), cadmium (Cd), cobalt (Co), and mercury (Hg) in different soil
types developed in different geological parent materials have been carried
out. The highest median concentrations of Fe and Mn were observed in soils
belonging to ice-rich permafrost sediments formed during the Pleistocene
(ice-complex) while the highest median values of Ni, Pb and Zn were found in
soils of both the ice-complex and the Holocene estuarine terrace of the Lena
River delta region, as well as in the southernmost study unit of the
hinterland area. Detailed observations of trace metal distribution on the
micro scale showed that organic matter content, soil texture and iron-oxide
contents influenced by cryogenic processes, temperature, and hydrological
regimes are the most important factors determining the metal abundance in
permafrost-affected soils. The observed range of trace element background
concentrations was similar to trace metal levels reported for other pristine
northern areas. |
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