Biogeosciences
Biogeosciences
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Articles | Volume 23, issue 9
Articles | Volume 23, issue 9
https://doi.org/10.5194/bg-23-3039-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-3039-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 9
Research article
 | 
06 May 2026
Research article |  | 06 May 2026

Seasonal contrast in rare earth elements concentration in sediment of the Mackenzie Delta

Thomas Bossé-Demers, Bennet Juhls, Martine Lizotte, Santiago Mareque, Audrey Gaudy, and Raoul-Marie Couture

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Short summary

We measured rare earth element concentrations in sediment of the Mackenzie River Delta during winter and fall to understand how seasons affect their mobility. Winter conditions showed nearly one hundred times more dissolved rare earth elements than fall, driven by organic matter that binds and mobilizes these elements under ice. Since spring floods may flush this winter buildup into the Arctic Ocean, changing ice cover patterns could alter how rivers deliver trace elements to coastal waters.

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