Propagation of pulsed sound signals on a shelf of free tidal sea: effects from coastal eddies and internal waves

• Autorzy: Mikryukov A. , Popov O. , Serebryany A.
• Języki publikacji: EN

Abstrakty

EN

A long term experiment on studying fluctuations of the parameters of pulsed sound signals in a shallow sea was carried out in the region of the northeastern coast of the Black sea in autumn, 2004. the data were collected on a 1.2-km fixed propagation pathat a 2-km distance from the coastline. During the entire experimentation, observations of temperature fluctuations near the receiving point were performed by the using the line temperature sensor. Fluctuations of the shape, energy and propagation time of the pulsed signals were studied. an attempt of their relation to the hydrodynamic processes on the shelf was taken. The change in the shape and the energy levelof the signal was analyzed for the moment of passing the anticyclonic topographic eddy over the coastal zone. It was shown that the fluctuations of the propagation time were sometimes as high as 17.6 ms. An enhanceof the short-period acoustic fluctuations accompanying the internsification of the internal waves was observed.

Słowa kluczowe

EN

pulsed sound signal; Black Sea; hydroacoustic

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2008
• Tom: Vol. 11
• Strony: 279--288
• Opis fizyczny: Bibliogr. 4 poz., wykr.

Twórcy

autor

Mikryukov A.

autor

Popov O.

autor

Serebryany A.

• Andreyev Acoustics Institute, Shvernik Str. 4, Moscow 117036 Russia,

Bibliografia

• 1. A.N. Serebryany, A.V. Furduev, K.D. Sabinin et al. Preliminary results of the ex Acoustics Institute on the Black Sea in 2002 (in Russian). Proceedings of 13* Russian Acoustical Society. Moscow: GEOS, 55 — 59, 2003.
• 2. V.G. Krivosheya, L.V. Moskalenko, V.B. Titov, On the regime of currents over the the North-Caucasian coast of the Black Sea, Oceanology, V. 44, 358-363. 2004.
• 3. K. V. Avilov, Pseudodifferential parabolic eąuations of sound propagation in the range-dependent ocean and their numerical solutions, Phys. Acoust, Vol. 41, 5-12,1
• 4. L.M. Brekhovskikh, V.V. Goncharov, Introduction to the mechanics of continues Russian), Moscow, Nauka, 135, 1982.