The results of researches of sound scattering in the upper layer for different regions of the ocean are presented and the main differences of sound scattering in the upper layer of the Arctic seas and in the Equatorial and mid-latitude ocean are shown. The features of distribution of sound-scattering layers on the continental shelf of the Sea of Japan in different seasons of the year were analyzed. Simultaneous studies of sound scattering and netting the fish collection of the plankton in situ allowed us to identify the relationship between the scattering of high frequency sound and distribution of zooplankton.
43.30.Gv Backscattering, echoes, and reverberation in water due to combinations of boundaries
43.30.Hw Rough interface scattering
$^1$V.I.Il’ichev Pacific Oceanological Institute, Far Eastern Branch of Russian Academy of Sciences
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