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Ocean Science An interactive open-access journal of the European Geosciences Union
Ocean Sci., 13, 453-463, 2017
https://doi.org/10.5194/os-13-453-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
14 Jun 2017
Lagrangian simulation and tracking of the mesoscale eddies contaminated by Fukushima-derived radionuclides
Sergey V. Prants, Maxim V. Budyansky, and Michael Y. Uleysky Laboratory of Nonlinear Dynamical Systems, Pacific Oceanological Institute of the Russian Academy of Sciences, 43 Baltiyskaya st., 690041 Vladivostok, Russia
Abstract. A Lagrangian methodology is developed to simulate, track, document and analyze the origin and history of water masses in ocean mesoscale features. It aims to distinguish whether water masses inside the mesoscale eddies originated from the main currents in the Kuroshio–Oyashio confluence zone. By computing trajectories for a large number of synthetic Lagrangian particles advected by the AVISO velocity field after the Fukushima accident, we identify and track the mesoscale eddies which were sampled in the cruises in 2011 and 2012 and estimate their risk of being contaminated by Fukushima-derived radionuclides. The simulated results are compared with in situ measurements, showing a good qualitative correspondence.

Citation: Prants, S. V., Budyansky, M. V., and Uleysky, M. Y.: Lagrangian simulation and tracking of the mesoscale eddies contaminated by Fukushima-derived radionuclides, Ocean Sci., 13, 453-463, https://doi.org/10.5194/os-13-453-2017, 2017.
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Short summary
A Lagrangian method is developed to track, document and analyze the origin and history of water masses in ocean features. Simulating synthetic tracers in the altimetry-derived velocity field, we identify and track the mesoscale eddies which have been sampled in the cruises after the Fukushima accident and estimate their risk of being contaminated by radionuclides. The simulated results are shown to be in a good qualitative correspondence with in situ measurements.
A Lagrangian method is developed to track, document and analyze the origin and history of water...
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