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| Titel |
Thermokarst lake waters across the permafrost zones of western Siberia |
| VerfasserIn |
R. M. Manasypov, O. S. Pokrovsky, S. N. Kirpotin, L. S. Shirokova |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 8, no. 4 ; Nr. 8, no. 4 (2014-07-11), S.1177-1193 |
| Datensatznummer |
250116241
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| Publikation (Nr.) |
 copernicus.org/tc-8-1177-2014.pdf |
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| Zusammenfassung |
| This work describes the hydrochemical composition of thermokarst lake and
pond ecosystems, which are observed in various sizes with different degrees
of permafrost influence and are located in the northern part of western
Siberia within the continuous and discontinuous permafrost zones. We
analysed the elemental chemical composition of the lake waters relative to
their surface areas (from 10 to 106 m2) and described
the elemental composition of the thermokarst water body ecosystems in
detail. We revealed significant correlations between the Fe, Al, dissolved
organic carbon (DOC) and various chemical elements across a latitude
gradient covering approximately 900 km. Several groups of chemical elements
that reflect the evolution of the studied water bodies were distinguished.
Combining the data for the studied latitude profile with the information
available in the current literature demonstrated that the average dissolved
elemental concentrations in lakes with different areas depend specifically
on the latitudinal position, which is presumably linked to (1) the elements
leached from frozen peat, which is the main source of the solutes in
thermokarst lakes, (2) marine atmospheric aerosol depositions, particularly
near the sea border and (3) short-range industrial pollution by certain
metals from the largest Russian Arctic smelter. We discuss the evolution of
the chemical compositions observed in thermokarst lakes during their
formation and drainage and predict the effect that changing the permafrost
regime in western Siberia has on the hydrochemistry of the lakes. |
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