Dense shelf water cascades and sedimentary furrow formation in the Cap de Creus Canyon, northwestern Mediterranean Sea

Puig, Pere; Palanqués, Albert; Orange, Daniel L.; Lastras, Galderic; Canals, Miquel

doi:10.1016/j.csr.2008.05.002

Cited by 135 publications

(116 citation statements)

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“…Submarine canyons represent the preferential pathway , as the shelf edge incision interacts with the bottom flow and funnel shelf water and material basinward. Significant increase of near-bottom transport of sediment were detected when storm-induced downwelling couples with DSWC, transporting resuspended sediments through the westernmost canyons as bottom turbidity layers Bonnin et al, 2008) and eroding canyon floor sediments Puig et al, 2008).…”

Section: Study Area and Oceanographic Settingsmentioning

confidence: 99%

“…Maximum speeds were reached in January and March 2006. This intense DSWC event was the last up to date recorded, and followed those that occurred in winters 1998/99 (Bethoux et al, 2002) and 2004/05 Puig et al, 2008 …”

Section: Near-bottom Temperature and Currents Measurements On The Slopementioning

confidence: 99%

“…Various studies carried out in the GoL have documented the rapid export of sediment from the shelf and upper slope to deeper environments by intense Published by Copernicus Publications on behalf of the European Geosciences Union. DSWC events occurring in winter 2004/05 (Bourrin et al, 2008;Puig et al, 2008;Ulses et al, 2008a) and winter 2005/06 (Sanchez-Vidal et al, 2008. Besides lateral (cross-slope) transport of material, the particle fluxes from open-ocean surface waters supply benthic sediments with fresh marine organic matter .…”

Section: Introductionmentioning

confidence: 99%

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Flux and composition of settling particles across the continental margin of the Gulf of Lion: the role of dense shelf water cascading

et al. 2010

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Section: Study Area and Oceanographic Settingsmentioning

confidence: 99%

Section: Near-bottom Temperature and Currents Measurements On The Slopementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Flux and composition of settling particles across the continental margin of the Gulf of Lion: the role of dense shelf water cascading

et al. 2010

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“…Some of them, mostly in the western Mediterranean, have long been investigated in relation to their morpho-sedimentology and oceanographic processes (e.g. Berné et al, 1999;Canals et al, 2004Canals et al, , 2009Puig et al, 2008) as well as to their biodiversity and fishery resources (e.g. Cartes et al, 1994;Stefanescu et al, 1994;Gili et al, 2000;Palanques et al, 2005;Sardà et al, 2009;Farrugio, 2012;Revenga Martinez de Pazos, 2012;Fabri et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Macro- and megafauna recorded in the submarine Bari Canyon (southern Adriatic, Mediterranean Sea) using different tools

et al. 2015

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Macro- and megafauna were recorded in the submarine Bari Canyon (southern Adriatic Sea, Mediterranean Sea) during an oceanographic cruise carried out in May-June 2012 and an experimental fishing survey conducted in November 2013. During the former, a total of 20 benthic samples were taken using a Van Veen grab at depths between 268 and 770 m and 4 deployments of a baited lander, for about 43 hours of video records, were carried out at depths between 443 and 788 m. During the latter, 8 longline fishing operations were conducted from 338 down to 612 m. Eighty-five living benthic and benthopelagic species were recorded: 29 Porifera, 1 Cnidaria, 2 Mollusca, 11 Annelida, 1 Arthropoda, 19 Bryozoa, 3 Echinodermata and 19 Chordata. A total of 51 species are new records for the Bari Canyon, 29 new records for the Adriatic Sea. Among the Porifera Cerbaris curvispiculifer is a new addition for the Italian Sponge Fauna. The first certain record of living specimens for the bryozoan Crisia tenella longinodata is reported. A total of 6 Mediterranean endemic species have been identified: 4 Porifera and 2 Annelida. The bathymetric range of some species has been extended. New information acquired for deep sea species confirms their importance in the structure of cold-water coral communities. This study has updated the knowledge on the biodiversity of the Adriatic Sea, as well as of the Bari Canyon in particular, one of the sites designated as “jewels of the Mediterranean” for which urgent conservation measures are needed.

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“…The inundation of the shelf during interglacial periods generated a relatively thin layer of water that was highly sensitive to atmospheric forcing, which may trigger the remobilisation of sedimentary particles temporarily stored on the shelf, as it happens during the present day highstand Canals et al, 2006;Dufois et al, 2008). Recent studies have demonstrated that nowadays northern cold, strong and persistent winds lead to DSWC down-slope at high speed (up to 1 m s −1 or more) during late winter and early spring months in the GoL coarser fraction efficiently scours and erodes the shelf edge and canyon heads and upper courses (Gaudin et al, 2006;Lastras et al, 2007;Pasqual et al, 2010;Puig et al, 2008;Sanchez-Vidal et al, 2008). Activation in the past of continental shelf erosive processes like DSWC probably did not lead to significant sediment accumulation in upper slope interfluves, but favoured the winnowing of fines and the supply of coarse lithic particles that, in combination with low sedimentation rates, contributed to generate CLs.…”

Section: The Orbital 100-kyr Sea-level Imprintmentioning

confidence: 99%

A 500 kyr record of global sea-level oscillations in the Gulf of Lion, Mediterranean Sea: new insights into MIS 3 sea-level variability

et al. 2012

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Abstract. Borehole PRGL1-4 drilled in the upper slope of the Gulf of Lion provides an exceptional record to investigate the impact of late Pleistocene orbitally-driven glacioeustatic sea-level oscillations on the sedimentary outbuilding of a river fed continental margin. High-resolution grainsize and geochemical records supported by oxygen isotope chronostratigraphy allow reinterpreting the last 500 ka upper slope seismostratigraphy of the Gulf of Lion. Five main sequences, stacked during the sea-level lowering phases of the last five glacial-interglacial 100-kyr cycles, form the upper stratigraphic outbuilding of the continental margin. The high sensitivity of the grain-size record down the borehole to sealevel oscillations can be explained by the great width of the Gulf of Lion continental shelf. Sea level driven changes in accommodation space over the shelf cyclically modified the depositional mode of the entire margin. PRGL1-4 data also illustrate the imprint of sea-level oscillations at millennial time-scale, as shown for Marine Isotopic Stage 3, and provide unambiguous evidence of relative high sea-levels at the onset of each Dansgaard-Oeschger Greenland warm interstadial. The PRGL1-4 grain-size record represents the first evidence for a one-to-one coupling of millennial time-scale sealevel oscillations associated with each Dansgaard-Oeschger cycle.

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Dense shelf water cascades and sedimentary furrow formation in the Cap de Creus Canyon, northwestern Mediterranean Sea

Cited by 135 publications

References 41 publications

Flux and composition of settling particles across the continental margin of the Gulf of Lion: the role of dense shelf water cascading

Flux and composition of settling particles across the continental margin of the Gulf of Lion: the role of dense shelf water cascading

Macro- and megafauna recorded in the submarine Bari Canyon (southern Adriatic, Mediterranean Sea) using different tools

A 500 kyr record of global sea-level oscillations in the Gulf of Lion, Mediterranean Sea: new insights into MIS 3 sea-level variability

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