Vertical export flux of metals in the Mediterranean Sea.

Heimbürger, Lars-Eric, Migon, Christophe, Losno, Rémi, Miquel, Juan-Carlos, Thibodeau, Benoit, Stabholz, Marion, Dufour, Aurélie and Leblond, Nathalie (2014) Vertical export flux of metals in the Mediterranean Sea. Deep Sea Research Part I: Oceanographic Research Papers, 87 . pp. 14-23. DOI 10.1016/j.dsr.2014.02.001.

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Abstract

We examined metal (Al, V. Cr, Mn, Fe, Ni, Cu, Zn, Cd and Pb) and particulate organic carbon (OC) concentrations of the marine vertical export flux at the DYFAMED time-series station in the Northwestern Mediterranean Sea. We present here the first data set of natural and anthropogenic metals from sediment trap moorings deployed at 1000 m-depth between 2003 and 2007 at the DYFAMED site. A highly significant correlation was observed between most metal concentrations, whatever the nature and emission source of the metal. Cu, Zn and Cd exhibit different behaviors, presumably due to their high solubility and complexation with organic ligands. The observed difference of atmospheric and marine fluxes in terms of temporal variability and elemental concentration suggests that dense water convection and primary production and not atmospheric deposition control the marine vertical export flux. This argument is strengthened by the fact that significant Saharan dust events did not result in concomitant marine vertical export fluxes nor did they generate significant changes in metal concentrations of trapped particles

Document Type: Article
Additional Information: WOS:000335286400002
Keywords: Trace metals; Sediment trap; Mediterranean Sea; Vertical export flux; Ballasting
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.dsr.2014.02.001
ISSN: 0967-0637
Projects: COMET, Laptev Sea System, Transdrift
Date Deposited: 02 Jun 2014 13:03
Last Modified: 02 Nov 2016 11:31
URI: http://oceanrep.geomar.de/id/eprint/24665

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