Open AccessGeneration of secondary internal waves by the interaction of an internal solitary wave with an underwater bank
Author(s) -
Vlasenko Vasiliy,
Alpers Werner
Publication year - 2005
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 - 10.1029/2004jc002467
Subject(s) - internal wave , barotropic fluid , amplitude , geology , underwater , internal tide , synthetic aperture radar , physics , acoustics , geophysics , geodesy , remote sensing , optics , oceanography
The generation of secondary internal waves by the interaction of a large‐amplitude internal solitary wave with the Dreadnought Bank in the Andaman Sea (6°40′N, 95° 47′E) is shown by analyzing a synthetic aperture radar (SAR) image acquired by the European Remote Sensing satellite ERS‐2 and by carrying out model calculations. Although the Dreadnought Bank is quite deep (241 m), the model calculations show that large‐amplitude internal solitary waves as encountered in this sea area can overturn and break over the bank and generate secondary internal waves. Comparison of model results with observations clearly demonstrates that the semicircular wave pattern visible on the ERS‐2 SAR image centered at the Dreadnought Bank is indeed a sea surface manifestation of a secondary internal wave packet generated by scattering of a large‐amplitude internal solitary wave and not by the interaction of the barotropic tidal flux with this underwater obstacle.