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FSLE for Fig.7 of Howell et al. (2009)ΒΆ

The backward-in-time finite-size Lyapunov exponents (FSLE) has been computed for the regions and periods of Fig. 7 of Howell et al. (2009) with the dots indicating the position of the loggerheads at that time. Beside the loggerhead identified by the green dot, the loggerheads are always on or near a filament of high FSLE. The hypothesis that loggerhead should be found most likely where FSLE are high thus does not fail the test but, given that filaments fill up a large portion of space, a more consequent statistical test would be needed.

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Figure 1: backward-in-time FSLE to be compared to Fig. 7 of Howell et al. (2009). The dots show the position of the loggerheads at that time.