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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Volume 12, issue 5 | Copyright

Special issue: KEOPS2: Kerguelen Ocean and Plateau Study 2

Biogeosciences, 12, 1415-1430, 2015
https://doi.org/10.5194/bg-12-1415-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 05 Mar 2015

Research article | 05 Mar 2015

Use of Ra isotopes to deduce rapid transfer of sediment-derived inputs off Kerguelen

V. Sanial et al.
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We investigated the origin and mechanisms of the natural iron fertilization that sustains a phytoplankton bloom downstream of the Kerguelen Islands. We used radium isotopes to trace the fate of shelf waters that may transport iron and other micronutrients towards offshore waters. We show that shelf waters are rapidly transferred offshore and may be transported across the polar front (PF). The PF may thus not be a strong physical barrier for chemical elements released by the shelf sediments.
We investigated the origin and mechanisms of the natural iron fertilization that sustains a...
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