Interferometry of hydrodynamics of oceanic shelf caused by intensive internal waves
https://doi.org/10.7868/S2073667320010050
Abstract
The results of data interferometric processing of the oceanographic large-scale experiment SWARM-95 on the coast of New Jersey are submitted in the paper. During the experiment, numerous sensors were deployed for registrations of hydrodynamics of water layers. They performed high-resolution oceanographic surveys of intensive internal waves by using conductivity–temperature–depth (CTD) casts and tows sensors. The acoustic component of experiment SWARM-95 is carried out on two stationary acoustic tracks at presence of intensive internal waves. The intensive internal waves led to significant 3D acoustic effects: horizontal refraction of modes and modes coupling. Within framework of experimental data processing the interference pattern of source sound field in receiver is analyzed by holographic processing. In result of holographic processing of interference pattern the two separated sets of spectral spots are obtained. The first set of spectral spots corresponds to sound field in unperturbed waveguide. The second set of spectral spots corresponds to hydrodynamic perturbation of sound field by IIW. The interference patterns of sound field in unperturbed waveguide and its hydrodynamic perturbation are recovered separately by filtering of one set of spectral spots in hologram domain. The transmission function of the unperturbed waveguide and the temporal variability of the ocean environment are restored.
Supporting agencies: This research was supported by grants of RFBR (№ 19–29–06075 and № 19–38–90326).
About the Authors
M. Badiey
University of Delaware
United States
United States
Newark
V. M. Kuz’kin
Prokhorov General Physics Institute of the Russian Academy of Sciences
Russian Federation
Russian Federation
Moscow
S. A. Pereselkov
Voronezh State University
Russian Federation
Russian Federation
Voronezh
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Review
For citations:
Badiey M., Kuz’kin V.M., Pereselkov S.A. Interferometry of hydrodynamics of oceanic shelf caused by intensive internal waves. Fundamental and Applied Hydrophysics. 2020;13(1):45-55. https://doi.org/10.7868/S2073667320010050
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