Biogeosciences
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Articles | Volume 17, issue 2
Articles | Volume 17, issue 2
https://doi.org/10.5194/bg-17-331-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-17-331-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 2
Research article
 | 
22 Jan 2020
Research article |  | 22 Jan 2020

Organic iron complexes enhance iron transport capacity along estuarine salinity gradients of Baltic estuaries

Simon David Herzog, Per Persson, Kristina Kvashnina, and Emma Sofia Kritzberg

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Short summary
Fe concentrations in boreal rivers are increasing strongly in several regions in Northern Europe. This study focuses on how Fe speciation and interaction with organic matter affect stability of Fe across estuarine salinity gradients. The results confirm a positive relationship between the relative contribution of organically complexed Fe and stability. Moreover, organically complexed Fe was more prevalent at high flow conditions and more dominant further upstream in a catchment.
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