On the concentrations of gas bubbles measured acoustically in the Baltic Sea - wind and time dependences

• Autorzy: Klusek Z. , Jakacki J.
• Konferencja: International Symposium on HYDROACOUSTICS AND ULTRASONICS EAA Symposium (formerly 13th FASE Symposium) Gdańsk-Jurata, 12-16 May 1997
• Języki publikacji: EN

Abstrakty

EN

A linear and nonlinear two-frequency acoustical technique has been used to make in situ measurements of gas bubbles profiles in the Baltic Sea. At three pairs of frequencies namely 30/35, 57/63 and 110/115 kHz spectral components of linear and nonlinear backscattered signal were extracted and their wind and depth dependences have been calculated. Preliminary results of nonlinear backscattering from the subsurface layer of gas bubbles in different hydrological conditions are presented.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 1997
• Tom: Vol. 1
• Strony: 103--108
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Klusek Z.

• Institute of Oceanology, Polish Academy of Sciences, ul. Powstańców Warszawy 55,81-712 Sopot, POLAND

autor

Jakacki J.

• Graduated Study, Gdansk University, Institute of Oceanography Gdynia, ul. Piłsudskiego 46, POLAND

Bibliografia

• 1. Cartmill, J.W.; Su, Ming- Yang, "Bubble size distribution under saltwater and freshwater breaking waves", Meet. of the Division of Fluid Dynamics of the American Physical Society. Ocean Sciences Meeting of the American Geophysical Union., Scottsdale, AZ (USA). New Orleans, LA (USA), Nov 1991. Jan 1992 [in] LABORATORYEXPERIMENTS-IN-PHYSICALOCEANOGRAPHY.-PART-B. Boyer, D.L., Fernando, H.J.S.;Van-Atta,-C.-eds. 1993 vol. 20, No. 1-2,25
• 2. Kolaini,-AR.; Crwn,-L.A; Roy,-R.A., (1994) "Bubble production by capillary-gravity waves", J Acoust. Soc. Am. 95, 1913
• 3. Medwin H., (1977) "In Situ Acoustic Measurements of Microbubbles at Sea" , J Geophys. Res, 82,971 108
• 4. Ostrovsky L.A., Sutin AM., (1993) "Nonlinear sound scattering from subsurface bubble layer", w Natural Physical Sources of Underwater Sound, ed. B.R. Kerman, Kluwer Academic Publishers
• 5. Wu Jin., (1988) "Bubble in the Near-Surface Ocean: A General Description", J. Geophys. Res., 93,587
• 6. Wu lin, (1994) "Bubbles in the Near-Surface Ocean: Their Various Structures", J.Phys. Oceanogr. 24, 1995
• 7. Zabolotskaya E., Soluyan S., (1972), "The radiation of Harmonics and Combination Frequencies by Air Bubbles", Sov.Phys. Acoustics, 18, No.3, 221