Proceedings of the KSRS Conference (대한원격탐사학회:학술대회논문집)
- 2008.10a
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- Pages.344-347
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- 2008
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- 1226-9743(pISSN)
BATHYMETRIC MODULATION ON WAVE SPECTRA
- Liu, Cho-Teng (Institute of Oceanography, National Taiwan University) ;
- Doong, Dong-Jiing (Dept. of Marine Environmental Informatics, National Taiwan Ocean Univ.)
- Published : 2008.10.29
Abstract
Ocean surface waves may be modified by ocean current and their observation may be severely distorted if the observer is on a moving platform with changing speed. Tidal current near a sill varies inversely with the water depth, and results spatially inhomogeneous modulation on the surface waves near the sill. For waves propagating upstream, they will encounter stronger current before reaching the sill, and therefore, they will shorten their wavelength with frequency unchanged, increase its amplitude, and it may break if the wave height is larger than 1/7 of the wavelength. These small scale (