Comparison of Experimental and Calculated Data on Ion Composition of Precipitation in the South of East Siberia

Kuchmenko, Ekaterina; Moloznikova, Yelena V.; Нецветаева, О. Г.; Kobeleva, Natalia A.; Ходжер, Т. В.

doi:10.1007/978-94-010-0082-6_34

Cited by 1 publication

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“…The studies on the hydrochemical impacts of climate change in Siberian Arctic rivers have focused mainly on the organic carbon (OC) transport, including the dissolved OC (DOC), suspended particulate OC (POC) and riverbed sediment OC (SOC) (e.g., Holmes et al , 2012;Jonget al , 2022;Mann et al , 2012;Wild et al , 2019). Compared to the research on OC, the recognition of inorganic elements transport, including heavy metals, is relatively poor and limited to selected elements (Ji et al , 2021;Kuchmenko et al , 2002;Lim et al , 2019). Systematic research on the potential accumulation of heavy metals in permafrost has only been conducted on mercury (Wang et al , 2022).…”

Section: Introductionmentioning

confidence: 99%

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

Szumińska

Kozioł

Chalov

et al. 2022

Preprint

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Permafrost regions are under particular pressure from climate change resulting in widespread landscape changes, which impact also freshwater chemistry. We investigated a snapshot of hydrochemistry in various freshwater environments in the lower Kolyma river basin (North-East Siberia, continuous permafrost zone) to explore the mobility of metals, metalloids and non-metals resulting from permafrost thaw. Particular attention was focused on heavy metals as contaminants potentially released from the secondary source in the permafrozen Yedoma complex. Permafrost creeks represented the Mg-Ca-Na-HCO -Cl-SO ionic water type (with mineralisation in the range 600-800 mg/L), while permafrost ice and thermokarst lake waters were the HCO -Ca-Mg type. Multiple heavy metals (As, Cu, Co, Mn and Ni) showed much higher dissolved phase concentrations in permafrost creeks and ice than in Kolyma and its tributaries, and only in the permafrost samples and one Kolyma tributary have we detected dissolved Ti or Hg. In thermokarst lakes, several metal and metalloid dissolved concentrations increased with water 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/L Mn, and 687 µg/L Zn in the bottom water layers. Permafrost-related waters were also enriched in dissolved phosphorus (up to 512 µg/L in Yedoma-fed creeks). The impact of permafrost thaw on river and lake water chemistry is a complex problem which needs to be considered both in the context of legacy permafrost shrinkage and the interference of the deepening active layer with newly deposited anthropogenic contaminants.

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