Open AccessInternal wave generation by tidal flow over a sill in a rotating channel
Author(s) -
Katsumata Katsurou,
Hibiya Toshiyuki
Publication year - 2002
Publication title -
journal of geophysical research: oceans
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2001jc001096
Subject(s) - kelvin wave , sill , internal wave , earth's rotation , tidal waves , forcing (mathematics) , physics , amplitude , mechanical wave , rotation (mathematics) , geophysics , mechanics , longitudinal wave , microseism , flow (mathematics) , wave propagation , gravity wave , geology , meteorology , atmospheric sciences , geometry , optics , seismology , mathematics , geochemistry , quantum mechanics
Many straits are not sufficiently narrow to justify neglecting the effect of the Earth's rotation. In the present study, analytic solutions are derived for the internal waves generated by strong tide‐sill interaction in a rotating channel, and the effect of the Earth's rotation on the internal wave generation is clarified. Solutions include the Poincaré waves with frequencies higher than the frequency of tidal forcing so that even when the forcing frequency is subinertial, there exist freely propagating Poincaré waves. The Kelvin waves as well as the Poincaré waves are generated. The amplitude of the Kelvin waves turns out to be much larger than that of the Poincaré waves so that most of the excited energy propagates away from the sill in the form of the Kelvin waves.