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Título

Deep sediment transport induced by storms and dense shelf-water cascading in the northwestern Mediterranean basin

AutorPalanques, Albert ; Puig, Pere ; Latasa, Mikel ; Scharek, Renate
Palabras claveShelf to basin sediment transport
Downward particle fluxes
Storms
Dense shelf water cascading
Northwestern Mediterranean
Gulf of Lions
Fecha de publicaciónmar-2009
EditorElsevier
CitaciónDeep Sea Research I: Oceanographic Research Papers 56(3): 425-434 (2009)
ResumenDownward particle fluxes and hydrodynamics in the northwestern Mediterranean basin were measured by a sediment trap and a current meter deployed at 2350 m depth, 250 m above bottom, from November 2003 to April 2005. During the winter of 2003–2004 there were high river discharges, two strong E–SE storms and several moderate storms and short periods of moderate dense shelf-water cascading during which dense shelf water did not reach the deep basin. Downward particle fluxes at the basin site were low during most of this winter but increased above one order of magnitude as a consequence of the strong storm and moderate cascading event that occurred in late February 2004. During the winter of 2004–2005, neither important river floods nor strong storms occurred but there were very intense and persistent dense shelf-water cascading events from February to April 2005. Dense shelf water, mixed with offshore convection water, reached the basin site in early March 2005, increasing downward particle fluxes by more than two orders of magnitude for more than 1 month. These observations indicate that events of significant sediment transport to the northwestern Mediterranean basin can be caused by severe winter E–SE storms associated with moderate cascading events or by exceptionally intense and persistent dense shelf-water cascading episodes alone. On the other hand, river floods, severe storms during water column stratification conditions (without cascading) and moderate storms concurrent with moderate dense shelf-water cascading did not generate sediment transport events able to reach the basin.
Descripción10 pages, 7 figures.-- Available online Nov 17, 2008.-- Full-text version available Open Access at: http://www.icm.csic.es/bio/projects/icmicrobis/pdf/Palanques%20et%20al%202009%20DSR.pdf
Versión del editorhttp://dx.doi.org/10.1016/j.dsr.2008.11.002
URIhttp://hdl.handle.net/10261/15624
DOI10.1016/j.dsr.2008.11.002
ISSN0967-0637 (Print)
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