20.道田 豊
  ADCPデータからみた黒潮の流速構造
  水路部研究報告,31,45-56,1995.


Velocity structure of the Kuroshio in East China Sea and south off Japan is
investigated by analysing ADCP data for the period from 1985 to 1990.
By analysing the ADCP data obtained along two meridional regular observation
lines, it is shown that the horizontal structure of the Kuroshio south off Japan
has big difference by the location of the Kuroshio axis: in the cases when it flows
closer to the coast and when it does far south from the coast. In the former cases,
horizontal structure of the eastward velocity decreases rapidly with its distance
form the Kuroshio axis onshoreward, and slowly offshoreward, that shows an
asymmetric profile. In the latter, on the other hand, it shown rather symmetric.
By calculating gridded mean velocities, vertical profile of the Kuroshio current is
proposed that the vertical shear down to 200 m is almost linear in the region
south of Japan, and the speed at 200 m is approximately half of the surface current.




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