HF ocean radar observation of surface currents induced by a typhoon in the East China Sea

A long-range (200 km) high-frequency (HF) ocean radar system was developed by Japan's Communications Research Laboratory (CRL) to monitor the Kuroshio upstream region of the East China Sea. Sea surface observation began in July 2001. In this paper, we present the validation results of surface currents obtained by the radar in comparison with currents measured using a moored current meter. We also present the results of observing temporal variations in the Kuroshio over a year and the surface currents induced by a strong typhoon.