抄録
Whereas the Kuroshio drifting up off the eastern coast of Japan is known to be controlled by the mesoscale dynamics,effects of the ageostrophic submesoscale dynamics on the mean structure,eddies,frontal processes,etc. have not been fully understood. Towards a rigorous submesoscale Kuroshio modeling,a detailed numerical downscaling experiment is performed with a double-nested ROMS at horizontal resolutions of 3 km and 1 km,forced by the assimilative JCOPE2 at 1/10 deg. as the boundary condition. According to the analysis on kinetic energy conversion rates along the principal frontal directions,meandering and scale transitions are attributed to baroclinic frontal instability,while suppressed by horizontal shear near the Kuroshio axis.
