Abstract
The effect of internal wave solitons on the sound field generated by a point source in a shallow sea is considered. In the framework of the theory of “horizontal rays and vertical modes,” the sound field pattern governed by the aforementioned hydrodynamic effect is investigated. It is shown that solitons can induce time-periodic focusing and defocusing of horizontal rays propagating at shallow angles to the internal wave front. This may result in the formation of “dynamical” horizontal sound channels, which, in its turn, results in considerable temporal fluctuations of the field along the acoustic track oriented along the internal wave front. For the sound field calculations, an approach is developed on the basis of the parabolic approximation in the horizontal plane and the mode representation in the vertical direction. The results obtained can be used for remote monitoring of internal wave packets in a shallow sea.
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References
Sound Transmission through a Fluctuating Ocean, Ed. by S. Flatte (Cambridge Univ. Press, Cambridge, 1979; Mir, Moscow, 1982).
C. J. R. Garrett and W. H. Munk, J. Geophys. Res. 80, 291 (1975).
A. N. Serebryannyi, Izv. Akad. Nauk, Fiz. Atmos. Okeana 29, 285 (1993).
S. I. Muyakshin, D. A. Selivanovskii, and A. Yu. Sokolov, in Problems of Ocean Acoustics, Ed. by L. M. Brekhovskikh and I. B. Andreeva (Nauka, Moscow, 1984), pp. 164–175.
D. Rubenstein and M. N. Brill, in Ocean Variability and Acoustic Propagation, Ed. by J. Plotter and A. Warn-Varnas (Kluwer Academic, Dordrecht, 1991), pp. 215–228.
Ju-Xun Zhou and Xue-Zhen Zhang, J. Acoust. Soc. Am. 90, 2042 (1991).
B. G. Katsnel’son and S. A. Pereselkov, Akust. Zh. 44, 653 (1998) [Acoust. Phys. 44, 684 (1998)].
J. R. Apel, M. Badiey, C. S. Chiu, et al., IEEE J. Ocean. Eng. 22, 465 (1997).
S. V. Borisov, A. V. Gritsenko, S. B. Kozitskii, et al., Akust. Zh. 40, 749 (1994) [Acoust. Phys. 40, 664 (1994)].
S. V. Borisov, R. A. Korotchenko, A. N. Rutenko, and M. Yu. Trofimov, Akust. Zh. 42, 702 (1996) [Acoust. Phys. 42, 618 (1996)].
K. D. Konyaev, D. E. Leikin, K. D. Sabinin, et al., Akust. Zh. 44, 470 (1998) [Acoust. Phys. 44, 407 (1998)].
Zhou Ju-Xun, Xue-Zhen Zhang, and P. H. Rogers, in Proceedings of IEEE Conference “Ocean ’96,” Fort Lauderdale, Florida, 1996, Vol. 1, pp. 1–8.
Wave Propagation and Underwater Acoustics, Ed. by J. B. Keller and J. S. Papadakis (Springer, New York, 1979).
A. Yu. Shmelerv, A. A. Migulin, and V. G. Petnikov, J. Acoust. Soc. Am. 92, 1003 (1992).
Yu. A. Kravtsov, V. M. Kuz’kin, and V. G. Petnikov, Akust. Zh. 30, 79 (1984) [Sov. Phys. Acoust. 30, 45 (1984)].
B. G. Katsnel’son and V. G. Petnikov, Acoustics of a Shallow Sea (Nauka, Moscow, 1997).
K. B. Smith and F. D. Tappert, UMPE: The University of Miami Parabolic Equation Model, Version 1.1 “MPL Technical Memorandum 432,” 1993.
F. D. Tappert, in Wave Propagation and Underwater Acoustics: Lecture Notes in Physics, Ed. by J. B. Keller and J. S. Papadakis (Springer, New York, 1977), Vol. 70, Chap. 5, pp. 224–287.
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Translated from Akusticheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Zhurnal, Vol. 46, No. 6, 2000, pp. 779–788.
Original Russian Text Copyright © 2000 by Katsnel’son, Pereselkov.
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Katsnel’son, B.G., Pereselkov, S.A. Low-frequency horizontal acoustic refraction caused by internal wave solitons in a shallow sea. Acoust. Phys. 46, 684–691 (2000). https://doi.org/10.1134/1.1326723
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DOI: https://doi.org/10.1134/1.1326723