Reemission of inorganic pollution from permafrost?: – a freshwater hydrochemistry study in the lower Kolyma basin (North-East Siberia)

Szumińska, D.; Koziol, K.; Chalov, S.R.; Efimov, V.A.; Frankowski, M.; Lehmann-Konera, S.; Polkowska, Ż.

Авторы: Szumińska Danuta, Koziol Krystyna, Chalov Sergiej R., Efimov Vasilii A., Frankowski Marcin, Lehmann-Konera Sara, Polkowska Żaneta
Журнал: Land Degradation and Development
Год издания: 2023
Издательство: John Wiley & Sons Inc.
Местоположение издательства: United States
Первая страница: 1
Последняя страница: 24
DOI: 10.1002/ldr.4866
Аннотация: Permafrost regions are under particular pressure from climate change resulting in widespread landscape changes, which impactalso freshwater chemistry. We investigated a snapshot of hydrochemistry in various freshwater environments in the lowerKolyma river basin (North-East Siberia, continuous permafrost zone) to explore the mobility of metals, metalloids and nonmetals resulting from permafrost thaw. Particular attention was focused on heavy metals as contaminants potentially releasedfrom the secondary source in the permafrozen Yedoma complex. Permafrost creeks represented the Mg-Ca-Na-HCO 3-Cl-SO 4ionic water type (with mineralisation in the range 600-800 mg/L), while permafrost ice and thermokarst lake waters were theHCO 3-Ca-Mg type. Multiple heavy metals (As, Cu, Co, Mn and Ni) showed much higher dissolved phase concentrations inpermafrost creeks and ice than in Kolyma and its tributaries, and only in the permafrost samples and one Kolyma tributaryhave we detected dissolved Ti or Hg. In thermokarst lakes, several metal and metalloid dissolved concentrations increased withwater depth (Fe, Mn, Ni and Zn - in both lakes; Al, Cu, K, Sb, Sr and Pb in either lake), reaching 1370 μg/L Cu, 4610 μg/LMn, and 687 μg/L Zn in the bottom water layers. Permafrost-related waters were also enriched in dissolved phosphorus (upto 512 μg/L in Yedoma-fed creeks). The impact of permafrost thaw on river and lake water chemistry is a complex problemwhich needs to be considered both in the context of legacy permafrost shrinkage and the interference of the deepening activelayer with newly deposited anthropogenic contaminants.
Добавил в систему: Ефимов Василий Антонович

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Reemission of inorganic pollution from permafrost?: – a freshwater hydrochemistry study in the lower Kolyma basin (North-East Siberia)статья

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