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Open Access item Oceanic three-dimensional Lagrangian Coherent Structures: A study in the Benguela upwelling region.
|Keywords:||Lagrangian Coherent Structures, Finite-Size Lyapunov exponents|
|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|
|Appears in Collections:||(IFISC) Artículos|
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