Lagrangian Coherent Structures (LCSs) are special material surfaces that act as organizing centers for tracer patterns in unsteady continuum motion.
In this talk I review recent results on elliptic LCSs that provide an objective way to define and locate coherent material vortices in turbulent flow data. I show applications to geophysical data sets, including satellite altimetry of the ocean and a cloud-video footage of Jupiter.
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