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Article

Effect of Subsurface Mediterranean Water Eddies on Sound Propagation Using ROMS Output and the Bellhop Model

1
Laboratoire d’Océanographie Physique et Spatiale, Université de Bretagne Occidentale, Ifremer, IRD, CNRS, 29280 Brest, France
2
Department of Non-Biologic Atmospheric and Oceanic Sciences, Faculty of Marine Science and Technology, University of Hormozgan, Bandar Abbas 79177, Iran
3
Consiglio Nazionale delle Ricerche, Istituto di Scienze Marine (CNR-ISMAR), 00133 Rome, Italy
4
Faculty of Marine and Oceanic Sciences, University of Mazandaran, Babolsar 29280, Iran
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Instituto Dom Luiz, Faculdade de Ciencias da Universidade de Lisboa, 1749-016 Lisbon, Portugal
6
Institut Mines Telecom Atlantique, Technopole Brest Iroise, 29280 Plouzane, France
*
Author to whom correspondence should be addressed.
Academic Editors: Małgorzata Godlewska and Shaowen Ye
Water 2021, 13(24), 3617; https://doi.org/10.3390/w13243617
Received: 11 October 2021 / Revised: 10 December 2021 / Accepted: 14 December 2021 / Published: 16 December 2021
(This article belongs to the Special Issue Hydroacoustics in Marine, Transitional and Freshwaters)
Ocean processes can locally modify the upper ocean density structure, leading to an attenuation or a deflection of sound signals. Among these phenomena, eddies cause significant changes in acoustic properties of the ocean; this suggests a possible characterization of eddies via acoustics. Here, we investigate the propagation of sound signals in the Northeastern Atlantic Ocean in the presence of eddies of Mediterranean Water (Meddies). Relying on a high-resolution simulation of the Atlantic Ocean in which Meddies were identified and using the Bellhop acoustic model, we investigated the differences in sound propagation in the presence and absence of Meddies. Meddies create sound channels in which the signals travel with large acoustic energy. The transmission loss decreases to 80 or 90 dB; more signals reach the synthetic receivers. Outside of these channels, the sound signals are deflected from their normal paths. Using receivers at different locations, the acoustic impact of different Meddies, or of the same Meddy at different stages of its life, are characterized in terms of angular distributions of times of arrivals and of energy at reception. Determining the influence of Meddies on acoustic wave characteristics at reception is the first step to inverting the acoustic signals received and retrieving the Meddy hydrological characteristics. View Full-Text
Keywords: Mediterranean Water eddies; sound propagation; ROMS model; Bellhop model Mediterranean Water eddies; sound propagation; ROMS model; Bellhop model
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MDPI and ACS Style

Hassantabar Bozroudi, S.H.; Ciani, D.; Mohammad Mahdizadeh, M.; Akbarinasab, M.; Aguiar, A.C.B.; Peliz, A.; Chapron, B.; Fablet, R.; Carton, X. Effect of Subsurface Mediterranean Water Eddies on Sound Propagation Using ROMS Output and the Bellhop Model. Water 2021, 13, 3617. https://doi.org/10.3390/w13243617

AMA Style

Hassantabar Bozroudi SH, Ciani D, Mohammad Mahdizadeh M, Akbarinasab M, Aguiar ACB, Peliz A, Chapron B, Fablet R, Carton X. Effect of Subsurface Mediterranean Water Eddies on Sound Propagation Using ROMS Output and the Bellhop Model. Water. 2021; 13(24):3617. https://doi.org/10.3390/w13243617

Chicago/Turabian Style

Hassantabar Bozroudi, Seyed H., Daniele Ciani, Mahdi Mohammad Mahdizadeh, Mohammad Akbarinasab, Ana C.B. Aguiar, Alvaro Peliz, Bertrand Chapron, Ronan Fablet, and Xavier Carton. 2021. "Effect of Subsurface Mediterranean Water Eddies on Sound Propagation Using ROMS Output and the Bellhop Model" Water 13, no. 24: 3617. https://doi.org/10.3390/w13243617

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