Abstract
The mean structure of turbulence intensity across the Kuroshio in spring is presented by compositing microstructure profiles on a stream coordinate. The composite mean of turbulent energy dissipation rate was high near fronts on both cyclonic and anticyclonic sides. On the cyclonic side, > 10−8 W kg−1 (vertical diffusivity of > 3 × 10−5 m2 s−1) was observed in the region of strong vertical shear of geostrophic velocity. Depth‐averaged within the depth range 50–150 m (150–250 m) was significantly higher at 0 to 50 km (−25 to 50 km) compared with >50 km from the axis. Although lower than on the cyclonic side, at depths of 50–150 m on the anticyclonic side near the front was again enhanced. On this side, the total vertical shear of horizontal velocity was strong, whereas the geostrophic shear was weak.
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