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Related Experiment Video

Updated: Dec 29, 2025

Evolution of Staircase Structures in Diffusive Convection

Evolution of Staircase Structures in Diffusive Convection

Published on: September 5, 2018

Stability of the Malvinas Current.

F J Beron-Vera¹, N Bodnariuk², M Saraceno²

¹Department of Atmospheric Sciences, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida 33149, USA.

Chaos (Woodbury, N.Y.)

|February 5, 2020

Summary

Researchers identified a stable transport barrier in the Malvinas Current using nonlinear dynamics. This barrier, composed of shearless-parabolic Lagrangian coherent structures (LCSs), divides flow regions and shows stability similar to Jupiter's atmospheric patterns.

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Area of Science:

Oceanography
Fluid Dynamics
Nonlinear Dynamics

Background:

The Malvinas Current plays a crucial role in ocean circulation.
Understanding its near-surface dynamics is essential for predicting transport and mixing.

Purpose of the Study:

To assess the enduring near-surface Lagrangian aspects of the Malvinas Current.
To identify and characterize transport barriers within the current.
To investigate the stability properties of the Malvinas Current.

Main Methods:

Applied deterministic tools from nonlinear dynamics to satellite altimetry velocity data.
Utilized probabilistic tools on satellite-tracked drifter trajectories.
Analyzed satellite-derived ocean color data and in situ velocity and hydrographic data.

Main Results:

Identified a resilient cross-stream transport barrier composed of shearless-parabolic Lagrangian coherent structures (LCSs).
These LCSs were consistently found in near-coincidental positions across a multiyear record.
Weakly communicating flow regions were identified on either side of the barrier.
Detected shearless-parabolic LCSs from altimetry data for the first time, with shapes resembling Jupiter's atmospheric "chevrons."
Found conditions for nonlinear symmetric stability, suggesting a Lagrangian-Eulerian stability duality.

Conclusions:

The Malvinas Current possesses a stable, persistent transport barrier formed by shearless-parabolic LCSs.
The findings suggest a connection between oceanic and atmospheric structures and stability.
The study highlights the utility of nonlinear dynamics tools for analyzing ocean currents.