Synthetic Aperture Radar observations of resonantly generated internal solitary waves at Race Point Channel (Cape Cod)
MetadataShow full item record
KeywordInternal solitary waves; Resonant generation; Flow through straits; Variable Froude; Synthetic aperture radar; Massachusetts Bay
Synthetic Aperture Radar images revealed the two-dimensional propagation characteristics of short-period internal solitary waves in Race Point Channel in Massachusetts Bay. The images and in situ measurements of the flow in the channel are used to infer the likely generation mechanism of the waves. The solitary waves are generated during the ebb phase of the tide within the channel. On some occasions, two trains of internal waves are generated presumably at the same location but at slightly different phases of the ebb tide. The main characteristics of the (two-layer) flow are described based on the criticality of the Froude number. It is suggested that these two individual packets of waves result from flow passage through resonance (where the Froude number is one). One packet is generated as the flow passes through the transcritical regime during the acceleration phase of the (ebb) tidal current, and another packet is generated during the deceleration phase. Both packets propagate upstream when the tide slacks, but with slightly different propagation directions.
Author Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 113 (2008): C11016, doi:10.1029/2008JC005004.
Showing items related by title, author, creator and subject.
Xie, Xiaohui; Li, Ming; Scully, Malcolm E.; Boicourt, William C. (American Meteorological Society, 2017-07-03)Internal solitary waves are commonly observed in the coastal ocean where they are known to contribute to mass transport and turbulent mixing. While these waves are often generated by cross-isobath barotropic tidal currents, ...
Signell, Richard P.; Chiggiato, Jacopo; Horstmann, Jochen; Doyle, James D.; Pullen, Julie; Askari, Farid (American Geophysical Union, 2010-04-24)The Adriatic Sea is regularly subjected to strong Bora wind events from the northeast during winter. The events have a strong effect on the oceanography in the Adriatic, driving basin-scale gyres that determine the transport ...
Sato, Tomamasa; Jaffe, Jules S. (Woods Hole Oceanographic Institution, 1985-02)This paper describes the underwater imaging method of "Synthetic Aperture Image Holography" which has real-time imaging capability. This method utilizes image holography and computer synthetic aperture techniques. ...