Articles | Volume 18, issue 5
Biogeosciences, 18, 1645–1671, 2021
https://doi.org/10.5194/bg-18-1645-2021
Biogeosciences, 18, 1645–1671, 2021
https://doi.org/10.5194/bg-18-1645-2021
Research article
09 Mar 2021
Research article | 09 Mar 2021

Radium-228-derived ocean mixing and trace element inputs in the South Atlantic

Yu-Te Hsieh et al.

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Short summary
The South Atlantic near 40° S is one of the high-productivity and most dynamic nutrient regions in the oceans, but the sources and fluxes of trace elements (TEs) to this region remain unclear. This study investigates seawater Ra-228 and provides important constraints on ocean mixing and dissolved TE fluxes to this region. Vertical mixing is a more important source than aeolian or shelf inputs in this region, but particulate or winter deep-mixing inputs may be required to balance the TE budgets.
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