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	Provedor de dados ArchiMer (2) Autor Brasseur, R (1) Cabanes, Cecile (1) Fagel, N (1) Hillaire-marcel, C (1) Humblet, M (1) Mercier, Herle (1) Racape, V. (1) Stevenson, R (1) Thierry, Virginie (1) Weis, D (1) Mais... Palavra-chave Deep circulation (2) Clay-size fraction (1) Deep-Argo float (1) Iceland-Scotland Overflow Water (1) Labrador Sea (1) Mixing (1) Nd and Pb isotopes (1) North Atlantic (1) North Atlantic Current (1) North Atlantic Ocean (1) Sedimentary mixings (1) Mais... Tipo do documento Text (2) Ano 2019 (1) 2004 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Nd and Pb isotope signatures of the clay-size fraction of Labrador Sea sediments during the Holocene: Implications for the inception of the modern deep circulation pattern ArchiMer Fagel, N; Hillaire-marcel, C; Humblet, M; Brasseur, R; Weis, D; Stevenson, R. Nd and Pb isotopes were measured on the fine fraction of one sediment core drilled off southern Greenland. This work aims to reconstruct the evolution of deep circulation patterns in the North Atlantic during the Holocene on the basis of sediment supply variations. For the last 12 kyr, three sources have contributed to the sediment mixture: the North American Shield, the Pan-African and Variscan crusts, and the Mid-Atlantic Ridge. Clay isotope signatures indicate two mixtures of sediment sources. The first mixture (12.2-6.5 ka) is composed of material derived from the North American shield and from a "young'' crustal source. From 6.5 ka onward the mixture is characterized by a young crustal component and by a volcanic component characteristic of the... Tipo: Text Palavras-chave: Clay-size fraction; Sedimentary mixings; Deep circulation; Nd and Pb isotopes; North Atlantic; Labrador Sea. Ano: 2004 URL: https://archimer.ifremer.fr/doc/00226/33731/32199.pdf ISOW spreading and mixing as revealed by Deep‐Argo floats launched in the Charlie Gibbs Fracture Zone ArchiMer Racape, V.; Thierry, Virginie; Mercier, Herle; Cabanes, Cecile. To improve our understanding of deep circulation, we deployed five Deep‐Argo floats (0–4000 m) in the Charlie Gibbs Fracture Zone (CGFZ), which channels the flow of Iceland‐Scotland Overflow Water (ISOW), a dense water mass of the North Atlantic Ocean. The floats were programmed to drift at 2750 dbar in the ISOW layer. The floats mainly moved westward in the CGFZ, although some of them followed different routes for few cycles depending on northward intrusions of the North Atlantic Current (NAC) over the CGFZ. One float revealed a direct route for ISOW from CGFZ to the Deep Western Boundary Current at Flemish Cap. In the CGFZ, oxygen data acquired by the floats revealed that the ISOW layer, characterized by salinity higher than 34.94 and density greater... Tipo: Text Palavras-chave: North Atlantic Ocean; Deep circulation; Deep-Argo float; Mixing; North Atlantic Current; Iceland-Scotland Overflow Water. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00513/62428/66710.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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