The potential of high-frequency hydroacoustic methods in oceanography

by

Yu.G. Artemov, V.N. Egorov

A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS,

RF, Sevastopol, Nakhimov Av., 2

E-mail: yu.g.artemov@ibss-ras.ru

DOI: 10.33075/2220-5861-2024-4-57-72

UDC 551.46.06                                         

EDN: https://elibrary.ru/mqkymv

Abstract:

The aim of the research was to prepare a literature review of modern advancements in the use of high-frequency sonar systems. This included: the acquisition and remote collection of new data from waters with varying thermohaline properties, the determination of the characteristics of methane gas plumes, the study of the landscape features of marine ecosystems, the detection of biological sound reflectors through echograms, the investigation of circadian rhythms in the migration of sound-scattering layers, the identification of fish schools and marine plant communities, and the search for the monitoring of deep-sea waste water discharges. It is proved that the range of proposed hydroacoustic methods will significantly expand the possibilities of remote study of marine ecosystems for the identification and determination of parameters of physical, biogeochemical and biological heterogeneities, such as gradients of the bathymetric structure of the bottom, point targets on the bottom, shapes and characteristics of internal waves, thermohaline gradients of marine frontal systems, methane bubbles, zooplankton, ichthyoplankton and fish. They show the possibilities of remote study of underwater landscapes with various biogeocenoses, control of deep-sea wastewater releases, as well as interpretation of backscattering echograms of surface and subsurface gas release sites to optimize the choice of sites for subsequent expensive seismic studies.

Keywords: hydroacoustic systems, marine ecosystems, methane gas bubble streams, landscapes, backscattering layers, fish schools, sea phytocenoses, remote sensing surveys.

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