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\bibitem{Thoppil_etal2016} Thoppil, P. G., Metzger, E. J., Hurlburt, H. E., Smedstad, O. M., \& Ichikawa, H. (2016). The current system east of the Ryukyu Islands as revealed by a global ocean reanalysis. \textit{Progress in Oceanography}, \textit{141}, 239--258.

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