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Eddy Surface Properties and Propagation at Southern Hemisphere Western Boundary Current Systems : Volume 12, Issue 1 (09/02/2015)

By Pilo, G. S.

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Book Id: WPLBN0004020861
Format Type: PDF Article :
File Size: Pages 26
Reproduction Date: 2015

Title: Eddy Surface Properties and Propagation at Southern Hemisphere Western Boundary Current Systems : Volume 12, Issue 1 (09/02/2015)  
Author: Pilo, G. S.
Volume: Vol. 12, Issue 1
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Mata, M. M., L. Azeved, J. L., & Pilo, G. S. (2015). Eddy Surface Properties and Propagation at Southern Hemisphere Western Boundary Current Systems : Volume 12, Issue 1 (09/02/2015). Retrieved from http://worldlibrary.net/


Description
Description: Laboratorio de Estudos dos Oceanos e Clima, Instituto de Oceanografia, Universidade Federal do Rio Grande (FURG), Rio Grande, Rio Grande do Sul, Brasil. Oceanic eddies occur in all world oceans, but are more energetic when associated to western boundary currents (WBC) systems. In these regions, eddies play an important role on mixing and energy exchange. Therefore, it is important to quantify and qualify eddies occurring within these systems. Previous studies performed eddy censuses in Southern Hemisphere WBC systems. However, important aspects of local eddy population are still unknown. Main questions to be answered relate to eddies' spatial distribution, propagation and lifetime within each system. Here, we use a global eddy dataset to qualify eddies based on their surface characteristics at the Agulhas Current (AC), the Brazil Current (BC) and the East Australian Current (EAC) Systems. We show that eddy propagation within each system is highly forced by the local mean flow and bathymetry. In the AC System, eddy polarity dictates its propagation distance. BC system eddies do not propagate beyond the Argentine Basin, and are advected by the local ocean circulation. EAC System eddies from both polarities cross south of Tasmania, but only anticyclonics reach the Great Australian Bight. Eddies in all systems and from both polarities presented a geographical segregation according to size. Large eddies occur along the Agulhas Retroflection, the Agulhas Return Current, the Brazil-Malvinas Confluence and the Coral Sea. Small eddies occur in the systems southernmost domains. Understanding eddies' propagation helps to establish monitoring programs, and to better understand how these features would affect local mixing.

Summary
Eddy Surface properties and propagation at Southern Hemisphere western boundary current systems

Excerpt
Azevedo, J. L. L., Nof, D., and Mata, M. M.: Eddy-train encounters with a continental boundary: a south atlantic case study, J. Phys. Oceanogr., 42, 1548–1565, doi:10.1175/JPO-D-11-027.1, 2012.; Baird, M. E. and Ridgway, K. R.: The southward transport of sub-mesoscale lenses of Bass Strait Water in the centre of anti-cyclonic mesoscale eddies, Geophys. Res. Lett., 39, L02603, doi:10.1029/2011GL050643, 2012.; Boebel, O., Lutjeharms, J., Schmid, C., Zenk, W., Rossby, T., and Barron, C.: The Cape Cauldron: a regime of turbulent inter-ocean exchange, Deep-Sea Res. Pt. II, 50, 57–86, 2003.; Bowen, M. M., Wilkin, J. L., and Emery, W. J.: Variability and forcing of the East Australian Current, J. Geophys. Res., 110, C03019, doi:10.1029/2004JC002533, 2005.; Byrne, D. A., Gordon, A. L., and Haxby, W. F.: Agulhas Eddies: a synoptic view using Geosat ERM data, J. Phys. Oceanogr., 25, 902–917, 1995.; Chelton, D. B., Schlax, M. G., Samelson, R. M., and de Szoeke, R. A.: Global observations of large oceanic eddies, Geophys. Res. Lett., 34, L15606, doi:10.1029/2007GL030812, 2007.; Chelton, D. B., Schlax, M. G., and Samelson, R. M.: Global observations of nonlinear mesoscale eddies, Prog. Oceanogr., 91, 167–216, doi:10.1016/j.pocean.2011.01.002, 2011.; Cresswell, G.: Currents of the continental shelf and upper slope of tasmania, Pap. Proc. Roy. Soc. Tasmania, 133, 21–31, 2000.; Cushman-Roisin, B. and Beckers, J.-M.: Introduction to Geophysical Fluid Dynamics, Academic Press, 739 pp., 2006.; da Silveira, I. C. A., Flierl, G. R., and Brown, W. S.: Dynamics of separating Western boundary currents, J. Phys. Oceanogr., 29, 119–144, doi:2.0.CO;2>10.1175/1520-0485(1999)029<0119:DOSWBC>2.0.CO;2, 1999.; De Boer, A. M., Graham, R. M., Thomas, M. D., and Kohfeld, K. E.: The control of the Southern Hemisphere Westerlies on the position of the Subtropical Front, J. Geophys. Res.-Oceans, 118, 5669–5675, doi:10.1002/jgrc.20407, 2013.; De Miranda, A. P., Barnier, B., and Dewar, W. K.: On the dynamics of the Zapiola Anticyclone, J. Geophys. Res., 104, 21137–21149, 1999.; de Steur, L. and van Leeuwen, P. J.: The influence of bottom topography on the decay of modeled Agulhas rings, Deep-Sea Res. Pt. I, 56, 471–494, doi:10.1016/j.dsr.2008.11.009, 2009.; Everett, J. D., Baird, M. E., Oke, P. R., and Suthers, I. M.: An avenue of eddies: quantifying the biophysical properties of mesoscale eddies in the Tasman Sea, Geophys. Res. Lett. 39, L16608, doi:10.1029/2012GL053091, 2012.; Flierl, G. R.: A simple model for the structure of warm and cold core rings, J. Geophys. Res., 84, 781–785, 1979.; Goni, G. J, Garzoli, S. L., Roubicek, A. J., Olson, D. B., and Brown, O. B.: Agulhas ring dynamics from TOPEX/POSEIDON satellite altimeter data, J. Marine Res., 55, 861–883, 1997.; Hall, C. and Lutjeharms, J. R. E.: Cyclonic eddies identified in the Cape Basin of the South Atlantic Ocean, J. Marine Syst., 85, 1–10, doi:10.1016/j.jmarsys.2010.10.003, 2011.; Lee, M.-M., Nurser, A. J. G., Coward, A. C., and de Cuevas, B. A.: Eddy advective and diffusive transports of heat and salt in the Southern Ocean, J. Phys. Oceanogr., 37, 1376–1393, doi:10.1175/JPO3057.1, 2007.; Legeckis, R. and Gordon, A. L.: Satellite observations of the Brazil and Falkland curre

 

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