Vertical export flux of metals in the Mediterranean Sea

Type Article
Date 2014-05
Language English
Author(s) Heimbuerger Lars-Eric1, 2, 3, Migon Christophe1, 2, Losno Remi4, Miquel Juan-Carlos5, Thibodeau Benoit1, 2, 6, Stabholz Marion7, Dufour Aurelie1, 2, Leblond Nathalie1, 2
Affiliation(s) 1 : Univ Paris 06, Univ Paris 04, UMR 7093, LOV,Observ Oceanol, F-06230 Villefranche Sur Mer, France.
2 : CNRS, Observ Oceanol, UMR 7093, LOV, F-06230 Villefranche Sur Mer, France.
3 : IFREMER, Ctr Mediterranee, F-83507 La Seyne Sur Mer, France.
4 : Univ Paris 7 Paris 12, LISA, CNRS UMR 7583, F-94010 Creteil, France.
5 : IAEA, Environm Labs, MC-98000 Monaco, Monaco.
6 : GEOMAR, Helmholtz Ctr Ocean Res, D-24148 Kiel, Germany.
7 : Univ Perpignan, CNRS, CEFREM, UMR 5110, F-66860 Perpignan, France.
Source Deep-sea Research Part I-oceanographic Research Papers (0967-0637) (Pergamon-elsevier Science Ltd), 2014-05 , Vol. 87 , P. 14-23
DOI 10.1016/j.dsr.2014.02.001
WOS© Times Cited 18
Keyword(s) Trace metals, Sediment trap, Mediterranean Sea, Vertical export flux, Ballasting
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 very 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.
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Heimbuerger Lars-Eric, Migon Christophe, Losno Remi, Miquel Juan-Carlos, Thibodeau Benoit, Stabholz Marion, Dufour Aurelie, Leblond Nathalie (2014). Vertical export flux of metals in the Mediterranean Sea. Deep-sea Research Part I-oceanographic Research Papers, 87, 14-23. Publisher's official version : , Open Access version :