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Warn-Varnas et al. 2005
Warn-Varnas, A.C., Chin-Bing, S.A., King, D.B., Hawkins, J.A., Lamb, K.G. and Teixeira, M. (2005). Yellow Sea ocean-acoustic solitary wave modeling studies. Journal of Geophysical Research 110: doi: 10.1029/2004JC002801. issn: 0148-0227.

This study is in an area south of the Shandong peninsula, near the region where Zhou et al. (1991) observed anomalous drops in acoustical intensity. Solitary wave generation and propagation simulations are performed using the Lamb (1994) nonhydrostatic model. The model simulations show that, for summer conditions, the existing semi-diurnal tidal flow over the topographic variations formed internal bores and solitary waves. For the Shandong area, we analyzed summer observations from Synthetic Aperture Radar (SAR) that tracked solitary wave trains from their surface roughness signatures. The images contained seven events consisting of internal bores and solitary waves that traveled in a well-defined direction for 2.5 days. The origin of the trains appeared at a well-defined point along a steep topographic drop. The SAR observations guided and tuned the model simulations, by comparing spectra of observed and modeled wavelengths. The tuned model yields wavelengths within factors of 2, or less, of those derived from SAR data. Wavelength and amplitude dispersion analysis showed two dispersion regimes. Modeled phase speeds were at the lower limit of phase speeds deduced from SAR data, from about 0.8 to 1.0 m/s. Acoustical intensity calculations in the presence of solitary wave trains will be undertaken in a subsequent paper using a parabolic equation acoustical model along the path of solitary wave train propagation.

BACKGROUND DATA FILES

Abstract

Keywords
Oceanography, Physical, Internal and inertial waves, Oceanography, General, Continental shelf and slope processes, Oceanography, General, Ocean predictability and prediction, Oceanography, General, Ocean acoustics, internal bores, solitary waves, wavelengths, phase speed, dispersion
Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/
Publisher
American Geophysical Union
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