Abstract
Toyama Bay, a semi-enclosed water area on the northern coast of Japan with an average water depth at 600 m, is known to have three primary water masses: the coastal surface layer, Tsushima Warm Current water and Japan Sea proper water. The present study describes the oceanographic characteristics of the bay based on the oceanographic observation programs, which include temperature and salinity with a CTD (Conductivity, Temperature and Depth profiler) system and current velocities with shipmounted ADCP (Acoustic Doppler Current Profiler), onboard, Toyama National College of Technology (TNCT) training ship, Wakashio-maru, from 2004 to 2012. By the ADCP observations at 2010, 2011 and 2012, the authors observed the main path of Tsushima Warm Current and an anticlockwise eddy with its diameters of about 20-30 nautical miles in the inner parts of the bay. The authors compared these ADCP data with a numerical simulation results for ocean current and satellite remote sensing data for the Chlorophyll-a concentration.
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