Quasi-Objective Eddy Visualization from Sparse Drifter Data
@inproceedings{Bartos2021QuasiObjectiveEV, title={Quasi-Objective Eddy Visualization from Sparse Drifter Data}, author={Alex P. Encinas Bartos and Nikolas O.Aksamit and George Haller}, year={2021} }
We employ a recently developed single-trajectory Lagrangian diagnostic tool, the trajectory rotation average (TRA) , to visualize oceanic vortices (or eddies) from sparse drifter data. We apply the TRA to two drifter data sets that cover various oceanographic scales: the Grand Lagrangian Deployment (GLAD) and the Global Drifter Program (GDP). Based on the TRA , we develop a general algorithm that extracts approximate eddy boundaries. We find that the TRA outperforms other available single…
One Citation
Objective Flow Measures Based on Few Trajectories
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This paper introduces the first objective measure of rotation behavior that is based on only few trajectories: at least 3 in 2D, and at least 4 in 3D, called trajectory vorticity (TRV), and shows that it is objective and that it can be introduced in two independent ways: by approaches for unsteadiness minimization and by considering the relative spin tensor.
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