Observation of the Relationship between Ocean Bathymetry and Acoustic Bearing-Time Record Patterns Acquired during a Reverberation Experiment in the Southwestern Continental Margin of the Ulleung Basin, Korea

We observed a distinct drop-off region in the bearing-time record of acoustic reverberation data acquired from the south-western continental margin of the Ulleung Basin, East Sea, in the summer of 2015. 3 kHz continuous waves with pulse lengths of 0.1, 0.3, and 1.0 s were used as source pulses, with...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Youngcheol Jung, Keunhwa Lee
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	bearing-time record continental slope bathymetry model reverberation pattern acoustic sensing bathymetry mapping Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/e5573647fa3147e29a80658dfc03947e
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:e5573647fa3147e29a80658dfc03947e
record_format	dspace
spelling	oai:doaj.org-article:e5573647fa3147e29a80658dfc03947e2021-11-25T18:04:53ZObservation of the Relationship between Ocean Bathymetry and Acoustic Bearing-Time Record Patterns Acquired during a Reverberation Experiment in the Southwestern Continental Margin of the Ulleung Basin, Korea10.3390/jmse91112592077-1312https://doaj.org/article/e5573647fa3147e29a80658dfc03947e2021-11-01T00:00:00Zhttps://www.mdpi.com/2077-1312/9/11/1259https://doaj.org/toc/2077-1312We observed a distinct drop-off region in the bearing-time record of acoustic reverberation data acquired from the south-western continental margin of the Ulleung Basin, East Sea, in the summer of 2015. 3 kHz continuous waves with pulse lengths of 0.1, 0.3, and 1.0 s were used as source pulses, with an R/V Cheonghae vessel towing a variable depth source and a triplet towed array toward the deep sea from shallow water. The observed pattern changed as the R/V Cheonghae moved across the continental slope further into the sea. This pattern arises as a result of the downward-refracted beams in the 1/2 convergence zone interacting with the soft bottom. In addition, the boundary of the drop-off region was modeled with the two-way maximum travel time of the first bottom-reflected rays using the bathymetry model of the General Bathymetric Chart of the Oceans, 2020. Some discrepancies were observed when comparing the modeled curve to the measured results, and the inaccuracy of the bathymetry model on the continental slope could be the main cause of these discrepancies. This pattern could be useful for bathymetry mapping, as well as estimations of source and receiver configurations.Youngcheol JungKeunhwa LeeMDPI AGarticlebearing-time recordcontinental slopebathymetry modelreverberation patternacoustic sensingbathymetry mappingNaval architecture. Shipbuilding. Marine engineeringVM1-989OceanographyGC1-1581ENJournal of Marine Science and Engineering, Vol 9, Iss 1259, p 1259 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bearing-time record continental slope bathymetry model reverberation pattern acoustic sensing bathymetry mapping Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
spellingShingle	bearing-time record continental slope bathymetry model reverberation pattern acoustic sensing bathymetry mapping Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Youngcheol Jung Keunhwa Lee Observation of the Relationship between Ocean Bathymetry and Acoustic Bearing-Time Record Patterns Acquired during a Reverberation Experiment in the Southwestern Continental Margin of the Ulleung Basin, Korea
description	We observed a distinct drop-off region in the bearing-time record of acoustic reverberation data acquired from the south-western continental margin of the Ulleung Basin, East Sea, in the summer of 2015. 3 kHz continuous waves with pulse lengths of 0.1, 0.3, and 1.0 s were used as source pulses, with an R/V Cheonghae vessel towing a variable depth source and a triplet towed array toward the deep sea from shallow water. The observed pattern changed as the R/V Cheonghae moved across the continental slope further into the sea. This pattern arises as a result of the downward-refracted beams in the 1/2 convergence zone interacting with the soft bottom. In addition, the boundary of the drop-off region was modeled with the two-way maximum travel time of the first bottom-reflected rays using the bathymetry model of the General Bathymetric Chart of the Oceans, 2020. Some discrepancies were observed when comparing the modeled curve to the measured results, and the inaccuracy of the bathymetry model on the continental slope could be the main cause of these discrepancies. This pattern could be useful for bathymetry mapping, as well as estimations of source and receiver configurations.
format	article
author	Youngcheol Jung Keunhwa Lee
author_facet	Youngcheol Jung Keunhwa Lee
author_sort	Youngcheol Jung
title	Observation of the Relationship between Ocean Bathymetry and Acoustic Bearing-Time Record Patterns Acquired during a Reverberation Experiment in the Southwestern Continental Margin of the Ulleung Basin, Korea
title_short	Observation of the Relationship between Ocean Bathymetry and Acoustic Bearing-Time Record Patterns Acquired during a Reverberation Experiment in the Southwestern Continental Margin of the Ulleung Basin, Korea
title_full	Observation of the Relationship between Ocean Bathymetry and Acoustic Bearing-Time Record Patterns Acquired during a Reverberation Experiment in the Southwestern Continental Margin of the Ulleung Basin, Korea
title_fullStr	Observation of the Relationship between Ocean Bathymetry and Acoustic Bearing-Time Record Patterns Acquired during a Reverberation Experiment in the Southwestern Continental Margin of the Ulleung Basin, Korea
title_full_unstemmed	Observation of the Relationship between Ocean Bathymetry and Acoustic Bearing-Time Record Patterns Acquired during a Reverberation Experiment in the Southwestern Continental Margin of the Ulleung Basin, Korea
title_sort	observation of the relationship between ocean bathymetry and acoustic bearing-time record patterns acquired during a reverberation experiment in the southwestern continental margin of the ulleung basin, korea
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/e5573647fa3147e29a80658dfc03947e
work_keys_str_mv	AT youngcheoljung observationoftherelationshipbetweenoceanbathymetryandacousticbearingtimerecordpatternsacquiredduringareverberationexperimentinthesouthwesterncontinentalmarginoftheulleungbasinkorea AT keunhwalee observationoftherelationshipbetweenoceanbathymetryandacousticbearingtimerecordpatternsacquiredduringareverberationexperimentinthesouthwesterncontinentalmarginoftheulleungbasinkorea
_version_	1718411652827709440

Observation of the Relationship between Ocean Bathymetry and Acoustic Bearing-Time Record Patterns Acquired during a Reverberation Experiment in the Southwestern Continental Margin of the Ulleung Basin, Korea

Ejemplares similares