Abstract
Secondary undulations caused by meteorological disturbances over the East China Sea are frequently observed in sea areas around the west coast of Kyushu Island. In this study, numerical analyses were carried out to figure out a relationship between propagation paths of atmospheric pressure wave over the East China Sea and characteristics of sea level fluctuation off the west coast of Kyushu Island. As the result, it is clarified that a behavior of water surface waves caused by atmospheric pressure disturbances strongly depends on incident position and angle of a pressure wave to the Okinawa Trough. A propagation path of the pressure wave also exerts a significant influence on timing that peaks of sea level fluctuation arise in the sea area off Meshima Island, Uji Island, Nagasaki, Kami-Koshiki and Makurazaki. In particular it is possible that a peak of sea level fluctuation in nearshore area off Kyushu Island comes around 4 hours before that around Meshima island located on the west side of the Okinawa Trough.
