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Eddy Measurements, Coastal Turbulence and Statistics in the Gulf of Lions : Volume 10, Issue 1 (11/01/2013)

By Redondo, J. M.

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Book Id: WPLBN0004020753
Format Type: PDF Article :
File Size: Pages 27
Reproduction Date: 2015

Title: Eddy Measurements, Coastal Turbulence and Statistics in the Gulf of Lions : Volume 10, Issue 1 (11/01/2013)  
Author: Redondo, J. M.
Volume: Vol. 10, Issue 1
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2013
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Matulka, A., Sekula, E., Platonov, A., Fraunie, P., & Redondo, J. M. (2013). Eddy Measurements, Coastal Turbulence and Statistics in the Gulf of Lions : Volume 10, Issue 1 (11/01/2013). Retrieved from http://worldlibrary.net/


Description
Description: Departament de Física Aplicada, Universitat Politècnica de Catalunya, Barcelona, Spain. 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.

Summary
Eddy measurements, coastal turbulence and statistics in the gulf of Lions

Excerpt
Arnau, P. A.: Aspectos de la variabilidad de mesoescala de la circulacion marina en la plataforma continental catalana, Ph.D. thesis, Universitat Politecnica de Catalunya, UPC, 600 pp., 2000 (in Catalan).; Bezerra, M. O., Diez, M., Medeiros, C., Rodriguez, A., Bahia, E., Sanchez-Arcilla, A., and Redondo, J. M.: Study on the influence of waves on coastal diffusion using image analysis, Appl. Sci. Res., 59, 191–204, doi:10.1023/A:1001131304881, 1998.; Bracco, A., von Hardenberg, J., Provenzale, A., Weiss, J. B., and McWilliams, J. C.: Dispersion and Mixing in Quasigeostrophic Turbulence, Phys. Rev. Lett., 92, 8–27, doi:10.1103/PhysRevLett.92.084501, 2004.; Carrillo, A., Sanchez, M. A., Platonov, A., and Redondo, J. M.: Coastal and Interfacial Mixing. Laboratory Experiments and Satellite Observations, Phys. Chem. Earth Pt. B, 26, 305–311, doi:10.1016/S1464-1909(01)00011-9, 2001.; Matulka, A., Redondo, J. M., and Carrillo, A.: Experiments in stratified and rotating decaying 2D flows, Il Nuovo Cimento, 31, 757–770, 2008.; Carrillo, A., Redondo, J. M., Fraunie, P., and Durand, N.: Induced structures under seasonal flow conditions in the Ebro delta shelf. Laboratory and numerical models, Il Nuovo Cimento C, 31, 771–790, 2008.; Davies, A. M., Xing, J., and Gjevik, B.: Barotropic and eddy generation by flow instability at the shelf edge: sensitivity to open boundary conditions inflow and diffusion, J. Geophys. Res., 108, 3035, doi:10.1029/2001JC001137, 2003.; Diez, M., Bezerra, M. O., Mosso, C., Castilla, R., and Redondo, J. M.: Experimental measurements and diffusion in harbor and coastal areas, Il Nuovo Cimento C, 31, 843–859. 2008.; Flexas, M. M., Van Heijst, G. J. F., Jorda, G., and Sanchez-Arcilla, A.: Numerical simulation of barotropic jets over a sloping bottom: comparison to a laboratory model of the Northern Current, J. Geophys. Res., 109, C12039, doi:10.1029/2004JC002286, 2004.; Flexas, M. M., Van Heijst, G. J. F., and Trieling, R. R.: The behaviour of jet currents over a continental slope topography with a possible application to the Northern Current, J. Phys. Oceanogr., 35, 790–810, 2005.; Gade, M. and Redondo, J. M.: Marine pollution in European coastal waters monitored by the ERS-2 SAR: a comprehensive statistical analysis, IGARSS 99, Hamburg, vol. III(1637–1639), 308–312, 1999.; Hu, Z. H., Doglioli, A. M., Petrenko, A. A., Marsaleix, P., and Dekeyser, I.: Numerical simulations of eddies in the Gulf of Lion, Ocean Model., 28, 203–208, doi:10.1016/j.ocemod.2009.02.004, 2009.; Johannessen, J. A.: Coastal Observing Systems: The Role of Synthetic Aperture Radar, John Hopkins APL Technical Digest, 21, 41–48, 2000.; Kolmogorov, A. N.: Dissipation of energy in locally isotropic turbulence, C.R. Acad. Sci. USSR, 32, 16–18, 1941.; Mahjoub, O. B., Redondo, J. M., and Babiano, A.: Structure functions in complex flows, Appl. Sci. Res., 59, 299–313, 1998.; Jolly, G. W., Mangin, A., Cauneau, F., Calatuyud, M., Barale, V., Snaith, H. M., Rud, O., Ishii, M., Gade, M., Redondo, J. M., and Platonov, A.: The Clean Seas Project Final Report (ENV4-CT96-0334), Ed. DG XII/D, Brusselas, 2000.; Munk, W., Armi, L., Fischer, K., and Zachariasen, F.: Spirals on the Sea, P. Roy. Soc. A-Math. Phy., 456, 1217–1280, 2000.; Platonov, A.: Application of the SAR images to the investigations of marine pollution and NW Mediterranean waters' dynamics, Ph.D. thesis, available at: http://www.tdx.cbuc.es, 2002 (in Spanish).; Redondo, J. M.: Turbulent mix

 

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