Ocean margins: the missing term for oceanic element budgets?

Figure1_Highlight2Jeandel, Catherine, Peucker-Ehrenbrink, Bernhard, Jones, Morgan T., Pearce, Christopher R., Oelkers, Eric H., Godderis, Yves, Lacan, François, Aumont, 0livier and Arsouze, Thomas

This paper underlines how poor is our understanding of the land-to-ocean element flux and rises the question of the “submarine weathering”. Indeed, isotopes of Nd, Si, Fe, Ra as well as REE, TDFe or Ba concentrations reveal that release from sediment deposited on oceanic margins can be a significant source for dissolved elements in seawater; processes yielding this release need to be understood (e.g: Boundary nepheloid layers could enhance it). This source, potentially important, has to be taken in account in oceanic budgets and climate models.

Eos, Vol. 92, No. 26, 28 June 2011

 

Latest highlights

Science Highlights

Icebergs as sources of trace metals to the ocean: which impact?

Earth’s Ice Sheets are known to release significant quantities of lithogenic particles into the ocean every year, but how does this material affect trace metal availability in the ocean?

18.10.2021

Science Highlights

Microbial trace metal trafficking on marine particles

This study provides evidence for the processing of nine particulate trace metals in multiple manners by diverse microbial communities.

28.09.2021

Science Highlights

Volcanic emissions in the Southern Ocean: an efficient and unexpected source of iron for this remote area

This study suggests that volcanic emission can represent a significant source of bioavailable Fe to open ocean anaemic ecosystems.

20.09.2021

Science Highlights

Surprisingly heavy silicon isotopes in the surface and deep Arctic Ocean

Brzezinski and his colleagues report on a comprehensive study of the Arctic Ocean silicic acid concentrations and silicon isotopic composition…

14.09.2021

Rechercher