The study of ocean water inhomogeneities by acoustic methods.

Autor:	Akulichev, Victor A.
Zdroj:	Journal of the Acoustical Society of America; 1990, Vol. 88 Issue S1, pS130-S131, 2p
Abstrakt:	This paper considers the results of experimental investigation into sound propagation through extended ocean water areas containing large-scale inhomogeneities in the form of frontal water mass zones or mesoscale inhomogeneities in the form of eddies. A comparison is made between the measured sound field and the corresponding numerical calculations. The changes in sound signal levels caused by large-scale inhomogeneities of ocean water in crossing frontal zones and eddies in the North Pacific and South Indian Oceans are shown. Distinctive characteristics of sound signal transition from the deep-water sound channel in subtropical waters to the near-surface underwater sound channel in sub-Arctic or sub-Antarctic waters (and vice versa) are discussed. The possibility of sounding different large-scale ocean water inhomogeneities by backscattering of powerful pulse signals is considered. Results of sound backscattering from frontal zones and from eddy perturbations are presented. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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