http://www.cnr.it/ontology/cnr/individuo/prodotto/ID252191
Analysis and modeling of contourite drifts and contour currents off promontories in the Italian Seas (Mediterranean Sea) (Abstract/Poster in atti di convegno)
- Type
- Label
- Analysis and modeling of contourite drifts and contour currents off promontories in the Italian Seas (Mediterranean Sea) (Abstract/Poster in atti di convegno) (literal)
- Anno
- 2013-01-01T00:00:00+01:00 (literal)
- Alternative label
Federico Falcini (1), Eleonora Martorelli (2), Francesco Chiocci (3), and Ettore Salusti (1) (2013)
Analysis and modeling of contourite drifts and contour currents off promontories in the Italian Seas (Mediterranean Sea)
in EGU General Assembly 2013
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Federico Falcini (1), Eleonora Martorelli (2), Francesco Chiocci (3), and Ettore Salusti (1) (literal)
- Note
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- (1) ISAC, CNR, Rome, Italy (ffalcini@sas.upenn.edu), (2) IGAG, CNR, Rome, Italy, (3) Dip. Scienze della Terra, Sapienza
Università di Roma, Rome, Italy (literal)
- Titolo
- Analysis and modeling of contourite drifts and contour currents off promontories in the Italian Seas (Mediterranean Sea) (literal)
- Abstract
- The complex relationship between currents flowing around capes and their related contourite deposits (i.e. marine
sediments deposited and/or reworked by the persistent action of bottom currents) is still an interesting and debated
topic, both from a sedimentologic and oceanographic perspective. We analyze here contourite drifts located at
intermediate depths off promontories in the southern Tyrrhenian and in the southern Adriatic Sea. The comparison
between bathymetric-stratigraphic data and numerical, tank and analytic results, allows us to investigate the
occurrence of contourite deposits around capes. We found that the presence of turbulence, and thus, of erosive
conditions for sediments in the lee-side of a cape, can be detected by using dimensionless numbers related to cape
dimension and ocean current features.
We, moreover, analyze the additional sedimentary processes caused by seafloor unevenness offshore the cape such
as local topographic depressions by applying the classical conservation of potential vorticity. The resulting effect
is a steady cyclonic circulation over the depression that affects contourite deposition. We show that the application
of the potential vorticity conservation provides a simple theoretical tool for the understanding of complex relations
among ocean current, seafloor morphologies, and sedimentary processes. This work can be seen as a new approach
to bridge the gap between marine sedimentology and physical oceanography. (literal)
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- Autore CNR
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