학술논문
CHARACTERISTICS OF INTENSIFICATION OF METEOROLOGICAL TSUNAMI IN OSAKA BAY CAUSED BY A MICROBAROMETRIC WAVE PROPAGATING NORTHEASTWARD, AND SENSITIVITY ON GRID RESOLUTION FOR NUMERICAL MODELING / 北東進する微気圧波による大阪湾内の気象津波増幅特性とその評価に格子解像度が及ぼす影響
Document Type
Journal Article
Author
Source
土木学会論文集B3（海洋開発） / Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering). 2022, 78(2)355
Subject
Language
Japanese
ISSN
2185-4688
Abstract
The characteristics of meteorological tsunamis generated by northeastward propagating micro-pressure waves are analyzed by varying the wavelength and speed of the pressure waves and the resolution of the numerical model. The results suggest that the distribution characteristics of the maximum tide level anomaly vary greatly depending on the wavelength and speed of the pressure wave due to the mode change of the bay water oscillation and the harbor amplification, and that the influence of the water level fluctuation propagating from outside Osaka Bay is also significant. The effect of resolution of numerical simulation was relatively small at the harbor mouth, while it had a large effect at the inner part of harbor, but the results were stable at resolutions of 30 m or less. Besides, our results indicate that even when water level fluctuations due to meteorological tsunamis are relatively small, current velocities in coastal areas can be large.