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Abstrakty
Simultaneous measurements of bubble density in the sea subsurface and positive ions in the lower atmosphere were performed in the Baltic Sea in the summer of 1999. Bubbles in two size ranges, around 27 and 100 žm, were measured acoustically. Airborne positive charge was measured with a Gerdien instrument. Observed concentrations of air ions varied from 60 cm-3 up to 600 cm-3. The relative role of bubbles and wind speed on the positive air ion concentrations over the brackish water of the Baltic Sea is discussed. The parameters of a model of a log-log dependence between charge concentration and bubble density are calculated. The correlation functions between time series of concentrations of positive charges over the sea and gas bubbles averaged over a depth range from 0.4 to 4 m and wind speed are presented. There was zero lag between the cross-correlation maxima of charge and bubbles, but there was a phase lag of one and a half hours between charge and wind speed.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
459--476
Opis fizyczny
Bibliogr. 14 poz., mapa, rys., wykr.
Twórcy
autor
- Institute of Oceanology, Polish Academy of Sciences, Powstańców Warszawy 55, PL-81-712 Sopot, Poland
autor
- Medical University of Gdańsk, Dębinki 1, PL-80-211 Gdańsk, Poland
autor
- Naval Postgraduate School, 833 Dyer Road, Monterey, CA 93943, USA
Bibliografia
- [1] Blanchard D. C., 1955, Electrified droplets from the bursting of bubbles at an air-sea water interface, Nature, 175, 334.
- [2] Blanchard D. C., 1963, The electrification of the atmosphere by particles from bubbles in the sea, Prog. Oceanogr., 1, 72-202.
- [3] Gathman S., Trent E. M., 1968, Space charge over the open ocean, J. Atmos. Sci., 25 (6), 1075-1079.
- [4] Haines M. A., Johnson B. D., 1995, Injected bubble populations in seawater and fresh water measured by a photographic method, J. Geophys. Res., 100 (C4), 7057-7068.
- [5] Hall M. V., 1989, A comprehensive model of wind generated bubbles in the ocean and predictions of the effects on the sound propagation at frequencies up to 4 0 kHz, J. Acoust. Soc. Am., 86, 1103-1117.
- [6] Iribarne J. V., Mason B. J., 1967, Electrification accompanying the bursting of bubbles in water and dilute aqueous solutions, T. Faraday Soc., 63, 2234-2245.
- [7] Jakacki J., 2002, Application of non-linear acoustic phenomena in investigations of gas bubbles in sea, Ph. D. thesis, Inst. Oceanol. PAN, Sopot, (in Polish).
- [8] Klusek Z., Jakacki J., 1998, Wind and time dependence of the gas bubble concentrations measured acoustically in the Baltic Sea, Proc. 4th Europ. Conf. Underwater Acoust. (Rome), 107-112.
- [9] Leighton T. G., 1997, The acoustic bubble, Acad. Press, London, 640 pp.
- [10] Leighton T. G., Phelps A. D., Ramble D. G., Sharpe D. A., 1996, Comparison of the abilities of eighth acoustic techniques to detect and size a simple bubble, Ultrasonics, 34, 661-667.
- [11] Parkinson W. C., Torreson O. W., 1931, The diurnal variation of the electric potential of the atmosphere over the oceans, UGGI Bull., 8, 340-345.
- [12] Reiter R., 1994, Charges on particles of different size from bubbles of Mediterranean Sea surf and from waterfalls, J. Geophys. Res., 99 (D5), 10807-10812.
- [13] Sutin A. M., Yoon S. W., Kim E. J., Didenkulov I. N., 1998, Non-linear acoustic method for bubble density measurements, J. Acoust. Soc. Am., 103 (3), 2377-2384.
- [14] Wu J., 1981, Bubble populations and spectra in near-surface ocean: summary and review of field measurements, J. Geophys. Res., 86, 457-463.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUS5-0011-0074