Investigation of acoustic properties of snow-covered sea ice
The paper presents results of field observations of hydroacoustic characteristics of snow-covered ice cover in shallow seas of the Arctic shelf. The purpose of the research was to determine the quantitative characteristics of the reflection and absorption coefficients of sound from the bottom of the...
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ftdoajarticles:oai:doaj.org/article:f68f15d5128d4bcc9776ee2e3149d6f1 2023-05-15T15:17:21+02:00 Investigation of acoustic properties of snow-covered sea ice R. A. Balakin G. I. Vilkov 2018-09-01T00:00:00Z https://doi.org/10.15356/2076-6734-2018-3-387-395 https://doaj.org/article/f68f15d5128d4bcc9776ee2e3149d6f1 RU rus Nauka https://ice-snow.igras.ru/jour/article/view/489 https://doaj.org/toc/2076-6734 https://doaj.org/toc/2412-3765 2076-6734 2412-3765 doi:10.15356/2076-6734-2018-3-387-395 https://doaj.org/article/f68f15d5128d4bcc9776ee2e3149d6f1 Лëд и снег, Vol 58, Iss 3, Pp 387-395 (2018) доплеровское расширение частотного спектра коэффициенты отражения и поглощения звука ледовые гидроакустические наблюдения Science Q article 2018 ftdoajarticles https://doi.org/10.15356/2076-6734-2018-3-387-395 2023-03-19T01:40:11Z The paper presents results of field observations of hydroacoustic characteristics of snow-covered ice cover in shallow seas of the Arctic shelf. The purpose of the research was to determine the quantitative characteristics of the reflection and absorption coefficients of sound from the bottom of the drifting ice cover, as well as the Doppler broadening of the frequency spectrum of acoustic signals depending on the thickness of the ice, the structure of the reflecting surface, the thickness of the snow cover, and the ice drift speed. The objective of the research was to obtain the data necessary for choosing optimal parameters of specialized hydroacoustic equipment designed to monitor ice conditions in the areas of operation of offshore oil and gas platforms. Researches were conducted in areas of active construction of engineering marine constructions and carrying out the transport operations. The research methodology was based on the use of an autonomous measuring complex, which for a long period was installed on the bottom of the sea at depths of 50 to 130 m. The recording system consisted of the following components: upward looking pulse sonar of the IPS-5 type produced by the Canadian company ASL; the Doppler meter of the ice drift speed ADCP (the RDI firm); and a RSM-7 electromechanical current meter. All devices operated in continuous mode with a measurement cycle of 1s, the results were recorded in memory and processed after lifting the devices to the surface. The time delays of signals reflected from the ice cover, as well as the amplitudes and variations of the sound attenuation depending on the reflectance and absorption coefficients were recorded in the memory of the up-looking sonar. Variations of time delays were used to calculate a settlement of ice formations and to determine the shape of the reflective surface, including the angles of inclination of ice keels. Doppler shift of frequency of reflected acoustic signals and broadening of the frequency spectrum were calculated using values of the ice ... Article in Journal/Newspaper Arctic Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Ice and Snow 58 3 387 395 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
доплеровское расширение частотного спектра коэффициенты отражения и поглощения звука ледовые гидроакустические наблюдения Science Q |
spellingShingle |
доплеровское расширение частотного спектра коэффициенты отражения и поглощения звука ледовые гидроакустические наблюдения Science Q R. A. Balakin G. I. Vilkov Investigation of acoustic properties of snow-covered sea ice |
topic_facet |
доплеровское расширение частотного спектра коэффициенты отражения и поглощения звука ледовые гидроакустические наблюдения Science Q |
description |
The paper presents results of field observations of hydroacoustic characteristics of snow-covered ice cover in shallow seas of the Arctic shelf. The purpose of the research was to determine the quantitative characteristics of the reflection and absorption coefficients of sound from the bottom of the drifting ice cover, as well as the Doppler broadening of the frequency spectrum of acoustic signals depending on the thickness of the ice, the structure of the reflecting surface, the thickness of the snow cover, and the ice drift speed. The objective of the research was to obtain the data necessary for choosing optimal parameters of specialized hydroacoustic equipment designed to monitor ice conditions in the areas of operation of offshore oil and gas platforms. Researches were conducted in areas of active construction of engineering marine constructions and carrying out the transport operations. The research methodology was based on the use of an autonomous measuring complex, which for a long period was installed on the bottom of the sea at depths of 50 to 130 m. The recording system consisted of the following components: upward looking pulse sonar of the IPS-5 type produced by the Canadian company ASL; the Doppler meter of the ice drift speed ADCP (the RDI firm); and a RSM-7 electromechanical current meter. All devices operated in continuous mode with a measurement cycle of 1s, the results were recorded in memory and processed after lifting the devices to the surface. The time delays of signals reflected from the ice cover, as well as the amplitudes and variations of the sound attenuation depending on the reflectance and absorption coefficients were recorded in the memory of the up-looking sonar. Variations of time delays were used to calculate a settlement of ice formations and to determine the shape of the reflective surface, including the angles of inclination of ice keels. Doppler shift of frequency of reflected acoustic signals and broadening of the frequency spectrum were calculated using values of the ice ... |
format |
Article in Journal/Newspaper |
author |
R. A. Balakin G. I. Vilkov |
author_facet |
R. A. Balakin G. I. Vilkov |
author_sort |
R. A. Balakin |
title |
Investigation of acoustic properties of snow-covered sea ice |
title_short |
Investigation of acoustic properties of snow-covered sea ice |
title_full |
Investigation of acoustic properties of snow-covered sea ice |
title_fullStr |
Investigation of acoustic properties of snow-covered sea ice |
title_full_unstemmed |
Investigation of acoustic properties of snow-covered sea ice |
title_sort |
investigation of acoustic properties of snow-covered sea ice |
publisher |
Nauka |
publishDate |
2018 |
url |
https://doi.org/10.15356/2076-6734-2018-3-387-395 https://doaj.org/article/f68f15d5128d4bcc9776ee2e3149d6f1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
Лëд и снег, Vol 58, Iss 3, Pp 387-395 (2018) |
op_relation |
https://ice-snow.igras.ru/jour/article/view/489 https://doaj.org/toc/2076-6734 https://doaj.org/toc/2412-3765 2076-6734 2412-3765 doi:10.15356/2076-6734-2018-3-387-395 https://doaj.org/article/f68f15d5128d4bcc9776ee2e3149d6f1 |
op_doi |
https://doi.org/10.15356/2076-6734-2018-3-387-395 |
container_title |
Ice and Snow |
container_volume |
58 |
container_issue |
3 |
container_start_page |
387 |
op_container_end_page |
395 |
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