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Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
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Volume 16, issue 6
Nonlin. Processes Geophys., 16, 665–675, 2009
https://doi.org/10.5194/npg-16-665-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Nonlinear processes in oceanic and atmospheric flows

Nonlin. Processes Geophys., 16, 665–675, 2009
https://doi.org/10.5194/npg-16-665-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  14 Dec 2009

14 Dec 2009

Low-frequency variability of the Kuroshio Extension

S. Pierini1 and H. A. Dijkstra2 S. Pierini and H. A. Dijkstra
  • 1Dipartimento di Scienze per l'Ambiente, Università di Napoli Parthenope, Naples, Italy
  • 2Institute for Marine and Atmospheric research Utrecht, Department of Physics and Astronomy, Utrecht University, Utrecht, The Netherlands

Abstract. In this paper, we provide a review of recent results targeted at the understanding of the low-frequency variability of the Kuroshio Extension. We provide the background and main arguments of two views which have recently been proposed to explain this variability. In the first view, wind-induced Rossby waves and the effects of mesocale eddies are crucial. The second view is based on low-dimensional equivalent-barotropic large-scale nonlinear dynamics, with neither Rossby wave dynamics nor baroclinic instability being important. Results from models supporting each view are discussed and confronted with results from available observations.

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