The Lagrangian description of aperiodic flows: a case study of the Kuroshio Current

Mendoza Parra, Carolina Andrea and Mancho, Ana María (2012). The Lagrangian description of aperiodic flows: a case study of the Kuroshio Current. "Nonlinear Processes in Geophysics", v. 19 (n. 4); pp. 449-472. ISSN 1023-5809. https://doi.org/10.5194/npg-19-449-2012.

Description

Title: The Lagrangian description of aperiodic flows: a case study of the Kuroshio Current
Author/s:
  • Mendoza Parra, Carolina Andrea
  • Mancho, Ana María
Item Type: Article
Título de Revista/Publicación: Nonlinear Processes in Geophysics
Date: August 2012
ISSN: 1023-5809
Volume: 19
Subjects:
Faculty: E.T.S.I. Navales (UPM)
Department: Enseñanzas Básicas de la Ingeniería Naval [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

This article reviews several recently developed Lagrangian tools and shows how their com- bined use succeeds in obtaining a detailed description of purely advective transport events in general aperiodic flows. In particular, because of the climate impact of ocean transport processes, we illustrate a 2D application on altimeter data sets over the area of the Kuroshio Current, although the proposed techniques are general and applicable to arbitrary time depen- dent aperiodic flows. The first challenge for describing transport in aperiodical time dependent flows is obtaining a representation of the phase portrait where the most relevant dynamical features may be identified. This representation is accomplished by using global Lagrangian descriptors that when applied for instance to the altimeter data sets retrieve over the ocean surface a phase portrait where the geometry of interconnected dynamical systems is visible. The phase portrait picture is essential because it evinces which transport routes are acting on the whole flow. Once these routes are roughly recognised it is possible to complete a detailed description by the direct computation of the finite time stable and unstable manifolds of special hyperbolic trajectories that act as organising centres of the flow.

More information

Item ID: 22367
DC Identifier: http://oa.upm.es/22367/
OAI Identifier: oai:oa.upm.es:22367
DOI: 10.5194/npg-19-449-2012
Official URL: http://www.nonlin-processes-geophys.net/19/449/2012/npg-19-449-2012.html
Deposited by: Memoria Investigacion
Deposited on: 30 Mar 2014 11:52
Last Modified: 21 Apr 2016 14:16
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