2020 Volume 76 Issue 2 Pages I_216-I_221
The simultaneity and the duration of high waves and storm surge on the coast of Okinawa Island are estimated by using a coupled ocean-wave model. The peak of the wave height and that of the tide anomaly sometimes appear simultaneously in a typhoon event on the Pacific coast, and the peak of the wave height tends to follow that of the tide anomaly on the East China Sea coast. In Naha, the time difference between these peaks is related to the typhoon forwarding angle to the island. Swell can travel for a long distance from a typhoon to the island; consequently, the duration of high waves is long compared with the coast of Tokyo Bay. The duration of the storm surge is more constant than that of the high waves. The suction effect of depression, the wind-drift effect, and the wave setup, of the storm surge varies with location and affect the duration of the storm surge.
