Distribution of dissolved trace elements in the Laptev Sea affected by the Lena River discharge

Yuliya Moiseeva; Darya Purgina; Irina Pipko; Natalia Guseva; Elena Gershelis; Albina Khvaschevskaya; Svetlana Pugach; Evgeniy Yakushev; Igor Semiletov

doi:10.1016/j.marpolbul.2024.116397

Distribution of dissolved trace elements in the Laptev Sea affected by the Lena River discharge

Mar Pollut Bull. 2024 Apr 20:202:116397. doi: 10.1016/j.marpolbul.2024.116397. Online ahead of print.

Authors

Yuliya Moiseeva¹, Darya Purgina², Irina Pipko³, Natalia Guseva⁴, Elena Gershelis⁵, Albina Khvaschevskaya⁴, Svetlana Pugach³, Evgeniy Yakushev⁶, Igor Semiletov²

Affiliations

¹ Tomsk Polytechnic University, 30, Lenin Avenue, Tomsk 634050, Russian Federation; Pacific Oceanological Institute Far Eastern Branch of the Russian Academy of Sciences, 43, Baltiyskaya St., Vladivostok 690041, Russian Federation; Tomsk State University, 36, Lenin Avenue, Tomsk 634050, Russian Federation. Electronic address: jamoiseeva@mail.ru.
² Tomsk Polytechnic University, 30, Lenin Avenue, Tomsk 634050, Russian Federation; Pacific Oceanological Institute Far Eastern Branch of the Russian Academy of Sciences, 43, Baltiyskaya St., Vladivostok 690041, Russian Federation; Tomsk State University, 36, Lenin Avenue, Tomsk 634050, Russian Federation.
³ Pacific Oceanological Institute Far Eastern Branch of the Russian Academy of Sciences, 43, Baltiyskaya St., Vladivostok 690041, Russian Federation.
⁴ Tomsk Polytechnic University, 30, Lenin Avenue, Tomsk 634050, Russian Federation.
⁵ Tomsk Polytechnic University, 30, Lenin Avenue, Tomsk 634050, Russian Federation; Sirius University of Science and Technology, Olympic Avenue 1, Federal Territory "Sirius" 354340, Russian Federation.
⁶ Norwegian Water Research Institute, Økernveien 94, Oslo, Norway.

PMID: 38643589
DOI: 10.1016/j.marpolbul.2024.116397

Abstract

This study presents new data on concentration of dissolved trace elements (DTE) in the Lena River-Laptev Sea mixing zone. Mean concentrations of some dissolved heavy metals in the mixing zone of fresh waters of the Lena River and sea waters of the Laptev Sea on the middle shelf and on the outer shelves are: 0.7± 0.05 μМ and 0.5 ± 0.04 μМ for Fe, 0.06 ± 0.01 μМ and 0.07 ± 0.01 μМ for Ni, 0.01 ± 0.003 μМ and 0.003 ± 0.002 μМ for Zn, 59.2 ± 7.4 nМ and 73.4 ± 12.8 nМ for Cu, respectively. Two major groups of DTE distribution were revealed according to their spatial behavior. The Li, V, As, Rb, Sr, Mo, U concentrations increase towards the outer shelf with increasing salinity. In contrast, mean concentrations of Al, Ti, Mn, Fe, Co decrease with increasing distance from the coast. The identified transport of freshwaters to a distance of 400 km is reflected in the distribution of DTE, which suggests that these elements are able to reach to the Central Arctic Ocean.

Keywords: Arctic Ocean; Dissolved trace elements; Laptev Sea; Lena River; Mixing zone; River runoff.