Upwelling of the cold slope water around the shelf edge of the East China Sea.

摘要

In order to determine the vertical velocity around the shelf edge of the East China Sea, the assimilation of the ADCP (acoustic Doppler current profiler) and CTD (conductivity-temperature-depth profiler) data is performed. The result of the assimilation shows the strong upwelling of about 10 super(-2) cm s super(-1) with shoreward motion during the passage of the Kuroshio frontal eddy. The Lagrangian particle tracing experiment is also conducted to examine the movement of the nutrient-rich cold slope water. The result of the experiment indicates that most of the upwelled cold slope water penetrated onto the shelf moves in the deep layer near the bottom, not in the euphotic layer near the sea surface, in contrast to the upwelling induced by the Gulf Stream frontal eddy.