Articles | Volume 16, issue 6
Biogeosciences, 16, 1305–1319, 2019
https://doi.org/10.5194/bg-16-1305-2019
Biogeosciences, 16, 1305–1319, 2019
https://doi.org/10.5194/bg-16-1305-2019

Research article 28 Mar 2019

Research article | 28 Mar 2019

Distribution of Fe isotopes in particles and colloids in the salinity gradient along the Lena River plume, Laptev Sea

Sarah Conrad et al.

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Short summary
Iron analysis of the particulate, colloidal, and truly dissolved fractions along the Lena River freshwater plume showed that the particulate iron dominates close to the coast. Over 99 % particulate and about 90 % colloidal iron were lost, while the truly dissolved phase was almost constant. Iron isotopes suggest that the shelf acts as a sink for particles and colloids with negative iron isotope values, while colloids with positive iron isotope values travel further out into the Arctic Ocean.
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