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The spectrum of a “gas plume” formed by a marine hydrocarbon seep is described. The noise spectral density has maxima at frequencies corresponding to the natural (collective) oscillations of the bubble cloud, which are related to the size of the gas plume and to the mean volume gas content in the medium. The spatial distribution of noise in depth near a gas plume is highly nonuniform and modal in nature. The nonuniformity is localized in the horizontal plane, and the localization radius is the smaller the higher the mode number is.
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Alexey O. Maksimov (2005) studied this question.
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