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	Provedor de dados ArchiMer (2) Autor Bagniewski, Witold (1) Ballini, M (1) Colin, C (1) Kissel, C (1) Meissner, Katrin J. (1) Menviel, Laurie (1) Richter, T (1) Mais... Palavra-chave Dansgaard-Oeschger cycles (2) AMOC (1) Bottom water circulation (1) Clay minerals (1) Delta O-18 (1) Glacial period (1) Heinrich events (1) MIS3 (1) Magnetic properties (1) Model-data comparison (1) North Atlantic (1) Mais... Tipo do documento Text (2) Ano 2017 (1) 2006 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Deep-water mass source and dynamic associated with rapid climatic variations during the last glacial stage in the North Atlantic: A multiproxy investigation of the detrital fraction of deep-sea sediments ArchiMer Ballini, M; Kissel, C; Colin, C; Richter, T. [1] In order to investigate North Atlantic Deep Water (NADW) dynamics and variability during the last glacial stage, a very high resolution multiproxy analysis of the detrital fraction of sediments deposited during Heinrich event 4 and Dansgaard-Oeschger cycles 8 and 7 has been conducted on three deep-sea cores. These cores are distributed along the path of the North Atlantic Deep Water from the Faeroe Shetland Channel to the Reykjanes ridge and the Irminger basin. The concentration in fine-grained magnetites, the Ti-content, and the smectite percentage within the clay minerals show similar and coeval fluctuations at each site and are comparable from one site to the other. This is the imprint of the detrital fraction originating from the northern basaltic... Tipo: Text Palavras-chave: Glacial period; Dansgaard-Oeschger cycles; North Atlantic; Bottom water circulation; Magnetic properties; Clay minerals. Ano: 2006 URL: https://archimer.ifremer.fr/doc/00235/34585/33077.pdf Exploring the oxygen isotope fingerprint of Dansgaard-Oeschger variability and Heinrich events ArchiMer Bagniewski, Witold; Meissner, Katrin J.; Menviel, Laurie. We present the first transient simulations of Marine Isotope Stage 3 (MIS 3) performed with an oxygen isotope-enabled climate model. Our simulations span several Dansgaard-Oeschger cycles and three Heinrich stadials and are directly compared with oxygen isotope records from 13 sediment and 2 ice cores. Our results are consistent with a 30-50% weakening of the Atlantic Meridional Overturning Circulation during Dansgaard-Oeschger stadials and a complete shutdown during Heinrich stadials. We find that the simulated delta O-18 anomalies differ significantly between Heinrich stadials and non-Heinrich stadials. This difference is mainly due to different responses in ocean circulation, and therefore climate, impacting oceanic delta O-18, while the volume of... Tipo: Text Palavras-chave: MIS3; Model-data comparison; Heinrich events; Dansgaard-Oeschger cycles; Delta O-18; AMOC. Ano: 2017 URL: https://archimer.ifremer.fr/doc/00420/53180/55067.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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