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Ocean Science An interactive open-access journal of the European Geosciences Union

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doi:10.5194/osd-10-55-2013
© Author(s) 2013. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
11 Jan 2013
Review status
A revision of this discussion paper for further review has not been submitted.
Eddy measurements, coastal turbulence and statistics in the gulf of Lions
J. M. Redondo1, A. Matulka1,3, A. Platonov1,2, E. Sekula1, and P. Fraunie3 1Departament de Física Aplicada, Universitat Politècnica de Catalunya, Barcelona, Spain
2MORINTECH, St. Petersburg, Russia
3L. S. E. E. T. Universite Sud Toulon Var – CNRS, BP20132, 83957 La Garde, France
Abstract. The advances in radar sensors may be applied to study the flow in the Region of Fresh Water Influence (ROFI) region of the ocean. The Synthetic Aperture Radar (SAR) is a useful tool that may be used to study both marine water dynamics and its pollution. Oil spills and natural slicks may be detected and processed with advanced computer techniques to reveal vortex dynamics and turbulence spectral characteristics of the complex eddy and current interaction in the ocean surface, more than 300 SAR images of the North-west Mediterranean Sea area taken between December 1996 and December 1998 were analyzed. A total of 255 eddies were detected under convenient environmental conditions and we analyzed statistically the appearance, size, shape and position of vortices in the test area. We find that the maximum size of the eddies detected near the coast is limited by the Rossby deformation radius and that there is a decrease in size in the coastal waters in the direction of the Liguro-Provenzal current with the largest eddies occurring near the cape of Rosas. Near the Rhone and Ebro rivers, high discharges also contribute to eddy forcing, coastal radar measurements confirm the SAR observations. The role of submarine canyons in the vortex generation is also confirmed due to the asymmetry of their distribution with respect to the thalwegs. It is demonstrated that useful information of a geometrical nature obtained by SAR satellite images may be used to estimate relevant dynamical parameters of coastal flows.

Citation: Redondo, J. M., Matulka, A., Platonov, A., Sekula, E., and Fraunie, P.: Eddy measurements, coastal turbulence and statistics in the gulf of Lions, Ocean Sci. Discuss., 10, 55-81, doi:10.5194/osd-10-55-2013, 2013.
J. M. Redondo et al.
Interactive discussionStatus: closed (peer review stopped)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
 
RC C15: 'Reviewer's comments', Wolf-Gerrit Fruh, 24 Feb 2013 Printer-friendly Version Supplement 
 
RC C17: 'comment to "Eddy measurements, coastal turbulence ..." by Redondo et al.', Francesco Tampieri, 25 Feb 2013 Printer-friendly Version Supplement 
 
RC C81: 'Referee comment on Redondo et al.', Anonymous Referee #3, 26 Mar 2013 Printer-friendly Version 
J. M. Redondo et al.
J. M. Redondo et al.

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