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Title: | Oceanic three-dimensional Lagrangian Coherent Structures: A study in the Benguela upwelling region. |
Authors: | Bettencourt, João H. CSIC ORCID; López, Cristóbal CSIC ORCID ; Hernández-García, Emilio CSIC ORCID | Keywords: | Lagrangian Coherent Structures Finite-Size Lyapunov exponents |
Issue Date: | Jul-2012 | Citation: | Ocean Modelling 51: 73-83 (2011) | Abstract: | We study three dimensional oceanic Lagrangian Coherent Structures (LCSs) in the Benguela region, as obtained from an output from the ROMS model. To this end we first compute Finite-Size Lyapunov exponent (FSLE) fields in the region volume, characterizing mesoscale stirring and mixing there. Average FSLE values show a general decreasing trend with depth, but there is a local maximum at about 100m depth. LCSs are extracted as ridges of the calculated FSLE fields. They present a “curtain-like” geometry in which the strongest attracting and repelling structures appear as quasivertical surfaces. LCSs around a particular cyclonic eddy, pinched o from the upwelling front are also calculated. The LCSs are confirmed to provide pathways and barriers to transport in and out of the eddy | Publisher version (URL): | http://dx.doi.org/10.1016/j.ocemod.2012.04.004 | URI: | http://hdl.handle.net/10261/45462 | DOI: | 10.1016/j.ocemod.2012.04.004 | ISSN: | 1463-5003 |
Appears in Collections: | (IFISC) Artículos |
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File | Description | Size | Format | |
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Benguela_OcModelling_Final_20111115.pdf | 1,49 MB | Adobe PDF | View/Open |
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