2023 Volume 79 Issue 5 Article ID: 22-00152
Sea levels had been observed at Fukuyama Port during about two months to investigate the local meteorological effects on the oceanic variations. Fukuyama Port is the long and narrow channel that extends about 8.5 km inland from the coast of the Seto Inland Sea. In this inlet, I observed the local meteorological effects such as the inverted barometer effect due to atmospheric pressure changes and the wind set-up effect due to easterly winds toward the deepest part of the port. These effects can cause over one meter rise in sea level under the extreme weather conditions such as approaching typhoons. In addition, the suboscillations with a period of about 42 minutes had been constantly observed in the port. The suboscillations caused a sea level rise about 0.4 m during the typhoon passing in September 2021. Therefore, in case that a typhoon would approach at high tide, the sea level could rise more than 3 m above the mean sea level due to the addition of the inverted barometer effect, the wind set-up effect and the suboscillations.
