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Provedor de dados:  ArchiMer
País:  France
Título:  High frequency of sediment gravity flow events in the Var submarine canyon (Mediterranean Sea)
Autores:  Khripounoff, Alexis
Vangriesheim, Annick
Crassous, Philippe
Etoubleau, Joel
Data:  2009-07
Ano:  2009
Palavras-chave:  West Mediterranean Sea
Particle flux
Var canyon
Hyperpycnal flow
Turbidity current
Resumo:  This study aimed to analyze the role river floods play in triggering gravity flows and to investigate the role of submarine canyon systems as a conduit for terrigenous material to the deep sea. Two years of measurements in the Var canyon at depths ranging from 1200 m to 2350 m indicate that six floods of the Var River triggered hyperpycnal flows, an important mechanism for transporting particulate matter to the deep-sea floor. These sediment gravity flows were characterized by a sudden increase of current velocity that lasted 8 to 22 h and by downward particle fluxes that reached up to 600 g m(-2)d(-1) of particles and 3.1 g m(-2)d(-1) in terms of organic carbon. These large inputs of sediment and organic carbon may have a significant impact on deep-sea ecosystems and carbon storage in the Mediterranean Sea.
Tipo:  Text
Idioma:  Inglês

Editor:  Elsevier
Formato:  application/pdf
Fonte:  Marine Geology (0025-3227) (Elsevier), 2009-07 , Vol. 263 , N. 1-4 , P. 1-6
Direitos:  2009 Elsevier Ltd All rights reserved.

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