Consulta: subjectFacets:"Ocean margin"
Registros recuperados: 2
Data/hora: 02/06/2024 17:37:32

Sources and exchanges of mercury in the waters of the Northwestern Mediterranean margin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cossa, Daniel; De Madron, Xavier Durrieu; Schafer, Jorg; Guedron, Stephane; Marusczak, Nicolas; Castelle, Sabine; Naudin, Jean-jacques.
Ocean margins are focal regions in terms of mercury (Hg) exchanges between the continent and the open sea. The aim of this paper is to describe the distribution and partition of Hg between the gaseous, dissolved and particulate phases in the waters of the Northwestern Mediterranean (NWM) margin, in order to assess the Hg sources and exchanges within the continuum between the continental shelf (Gulf of Lions) and the open sea (Northern Gyre). Mean (± standard deviation) of total Hg species (HgT) concentrations in unfiltered water samples were 1.52 ± 1.00 pmol L-1 (n=36) in the inner shelf, 1.09 ± 0.15 pmol L-1 (n=30) along the slope, and 1.10 ± 0.13 pmol L-1 (n=99) in the Northern Gyre. The dissolved phase (&lt;0.45µm) average concentrations were 0.80 ±...
Tipo: Text
Palavras-chave: Mercury; Ocean margin; Coastal area; Mediterranean.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00384/49563/50055.pdf

The open sea as the main source of methylmercury in the water column of the Gulf of Lions (Northwestern Mediterranean margin)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cossa, Daniel; De Madron, Xavier Durrieu; Schafer, Jorg; Lanceleur, Laurent; Guedron, Stephane; Buscail, Roselyne; Thomas, Bastien; Castelle, Sabine; Naudin, Jean-jacques.
Despite the ecologic and economical importance of coastal areas, the neurotoxic bioaccumulable monomethylmercury (MMHg) fluxes within the ocean margins and exchanges with the open sea remain unassessed. The aim of this paper is to address the questions of the abundance, distribution, production and exchanges of methylated mercury species (MeHgT), including MMHg and dimethylmercury (DMHg), in the waters, atmosphere and sediments of the Northwestern Mediterranean margin including the Rhône River delta, the continental shelf and its slope (Gulf of Lions) and the adjacent open sea (North Gyre).  Concentrations of MeHgT ranged from &lt;0.02 to 0.48 pmol L−1 with highest values associated with the oxygen-deficient zone of the open sea. The methylated mercury to...
Tipo: Text
Palavras-chave: Mercury; Methylmercury; Ocean margin; Coastal area; Mediterranean.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00363/47399/47477.pdf