Труды Института механики им. Р.Р. Мавлютова

ISSN 2542–0380

Электронный научный журнал | Electronic Scientific Journal

Proceedings of the Mavlyutov Institute of Mechanics

Grimshaw R., Ostrovsky L.A., Topolnikov A.S., Khusnutdinova K.R. Influence of Internal Wave on the Sound Propagation in the Subsurface Bubble Layer Proceedings of the Institute of Mechanics of Ufa Branch of RAS. 8 (2011). 54–64.

2011. Vol. 8. Issue 1, Pp. 54–64
URL: http://proc.uimech.org/uim2011.1.005,en
DOI: 10.21662/uim2011.1.005

Influence of Internal Wave on the Sound Propagation in the Subsurface Bubble Layer

Grimshaw R.^∗, Ostrovsky L.A.^∗∗, Topolnikov A.S.^∗∗∗, Khusnutdinova K.R.^{∗,∗∗∗}

^∗Loughborough University, Loughborough
^∗∗University of Colorado, Boulder
^∗∗∗Institute of Mechanics, Ufa

Abstract

In the paper the influence of non-linear internal wave on the propagation of acoustic signal in the subsurface ocean layer containing gas bubbles is considered. During interaction with surface waves the internal wave causes its collapse and influences the structure of bubble layer. Inhomogeneous structure of the layer promotes the local speed of sound and intensity of scattering near the ocean surface to modulate by internal wave with slight shift in phase in the direction of its propagation, which agree with recent experimental observations made on the shelf of Japan Sea.