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Finescale measurements of Kelvin-Helmholtz instabilities at a Kuroshio seamount

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Analysis reveals characteristics of shear instabilities in billows downstream of a seamount, emphasizing turbulence dynamics.

Kelvin-Helmholtz instabilities are observed with heights of 51 ± 10 m and widths of 162 ± 72 m.
The study identified 135 KH billows, suggesting actively growing instabilities due to positive reduced-shear squared S 2 - 4 N 2.
Large turbulent kinetic energy dissipation rates of approximately 10−5 W kg −1 were inferred from density overturns in the billows.
As aspect ratios increase, density gradients smear out and dissipation rates rise significantly in billows with H / L < 0.6.

Vladoiu et al. (2025) studied this question.

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