Detection of Lagrangian Coherent Structures in oceanic flows

The Atlantic Meridional Overturning Circulation (AMOC) is a complex system of shallow and deep currents in the Atlantic Ocean which plays a crucial role in the regulation of the Earth's climate. Lagrangian Coherent Structures (LCS) are geometric objects existing in the extended phase space of d...

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Bibliographic Details
Main Author: Bruera, Renzo
Other Authors: Universitat Politècnica de Catalunya. Departament de Matemàtiques, Curbelo Hernández, Jezabel, Mancho Sanchez, Ana Maria
Format: Master Thesis
Language:English
Published: Universitat Politècnica de Catalunya 2021
Subjects:
Àrees temàtiques de la UPC::Matemàtiques i estadística::Equacions diferencials i integrals::Sistemes dinàmics
Differentiable dynamical systems
Dynamical systems
Lagrangian descriptors
Geophysical fluids
Computational methods
Lagrangian Coherent structures
Sistemes dinàmics diferenciables
Teoria ergòdica
Classificació AMS::37 Dynamical systems and ergodic theory::37N Applications
Newfoundland
Online Access:http://hdl.handle.net/2117/348777
Description
Summary:The Atlantic Meridional Overturning Circulation (AMOC) is a complex system of shallow and deep currents in the Atlantic Ocean which plays a crucial role in the regulation of the Earth's climate. Lagrangian Coherent Structures (LCS) are geometric objects existing in the extended phase space of dynamical systems which organise the flow around them. Currently there exist several methods for the detection of LCS. We describe and discuss the use of Lagrangian descriptors as a tool for detecting LCS and apply it in the case of the AMOC to study and identify relevant transport pathways. We successfully identify the main components of the AMOC and their interactions and observe new convective regions off the coast of the United States and the Grand Banks of Newfoundland.

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