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Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
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Volume 17, issue 2
Nonlin. Processes Geophys., 17, 103-111, 2010
https://doi.org/10.5194/npg-17-103-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Nonlinear processes in oceanic and atmospheric flows

Nonlin. Processes Geophys., 17, 103-111, 2010
https://doi.org/10.5194/npg-17-103-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

  11 Mar 2010

11 Mar 2010

The turnstile mechanism across the Kuroshio current: analysis of dynamics in altimeter velocity fields

C. Mendoza1, A. M. Mancho1, and M.-H. Rio2 C. Mendoza et al.
  • 1Instituto de Ciencias Matemáticas, CSIC-UAM-UC3M-UCM, Serrano 121, 28006 Madrid, Spain
  • 2CLS – Space Oceanography Division, Toulouse, France

Abstract. In this article we explore the utility of dynamical systems tools for visualizing transport in oceanic flows described by data sets measured from satellites. In particular we have found the geometrical skeleton of some transport processes in the Kuroshio region. To this end we have computed the special hyperbolic trajectories, and identified them as distinguished hyperbolic trajectories, that act as organizing centres of the flow. We have computed their stable and unstable manifolds, and they reveal that the turnstile mechanism is at work during several spring months in the year 2003 across the Kuroshio current. We have found that near the hyperbolic trajectories takes place a filamentous transport front-cross the current that mixes waters from both sides.

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