Effects of sea-ice ridges on sound propagation in the Arctic Ocean
An environmental/acoustic model of sound propagation in the Arctic Ocean, which accounts for reflection losses from ridged sea ice, has been developed. In this model sea-ice ridges are represented as infinitely long, randomly distributed, elliptical half-cylinders. Under-ice reflection losses for ac...
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NATO. SACLANTCEN
1975
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ftcentremre:oai:cmre.archive.knowledgearc.net:20.500.12489/717 2023-05-15T14:37:41+02:00 Effects of sea-ice ridges on sound propagation in the Arctic Ocean Diachok, Orest I. 1975/10 26 p. : ill. digital, PDF file https://hdl.handle.net/20.500.12489/717 English eng NATO. SACLANTCEN 304 CP-17/3 http://hdl.handle.net/20.500.12489/717 In: Ocean Acoustic Modelling (SACLANTCEN Conference Proceedings CP-17), Part 3, 1975, pp. 9-1 - 9-26. Arctic Ocean Sea ice Acoustic propagation Underwater acoustics Acoustic reflection loss Papers and Articles Conference Proceedings (CP) 1975 ftcentremre https://doi.org/20.500.12489/717 2022-03-27T09:38:02Z An environmental/acoustic model of sound propagation in the Arctic Ocean, which accounts for reflection losses from ridged sea ice, has been developed. In this model sea-ice ridges are represented as infinitely long, randomly distributed, elliptical half-cylinders. Under-ice reflection losses for acoustic wavelengths either large or small compared to ridge dimensions are computed from theoretical equations as a function of average keel depth and width, number of ridges per km, and grazing angle. Numerical values of under-ice reflection loss as a function of grazing angle are then incorporated into ray theoretical computations of transmission loss assuming a single sound speed'profile which is characteristic of the central Arctic Ocean. The validity of the concepts, approximations, and the limitations of the model, and the accuracy of coincident measurements of environmental and acoustic parameters required to validate the model are discussed. To illustrate the predictions and accuracy of the model under diverse ice conditions, several comparisons of theoretical and experimental determinations of under-ice transmission loss in the central Arctic Ocean are presented. Other/Unknown Material Arctic Arctic Ocean Sea ice CMRE Open Library (NATO STO Centre for Maritime Research and Experimentation Arctic Arctic Ocean |
institution |
Open Polar |
collection |
CMRE Open Library (NATO STO Centre for Maritime Research and Experimentation |
op_collection_id |
ftcentremre |
language |
English |
topic |
Arctic Ocean Sea ice Acoustic propagation Underwater acoustics Acoustic reflection loss |
spellingShingle |
Arctic Ocean Sea ice Acoustic propagation Underwater acoustics Acoustic reflection loss Diachok, Orest I. Effects of sea-ice ridges on sound propagation in the Arctic Ocean |
topic_facet |
Arctic Ocean Sea ice Acoustic propagation Underwater acoustics Acoustic reflection loss |
description |
An environmental/acoustic model of sound propagation in the Arctic Ocean, which accounts for reflection losses from ridged sea ice, has been developed. In this model sea-ice ridges are represented as infinitely long, randomly distributed, elliptical half-cylinders. Under-ice reflection losses for acoustic wavelengths either large or small compared to ridge dimensions are computed from theoretical equations as a function of average keel depth and width, number of ridges per km, and grazing angle. Numerical values of under-ice reflection loss as a function of grazing angle are then incorporated into ray theoretical computations of transmission loss assuming a single sound speed'profile which is characteristic of the central Arctic Ocean. The validity of the concepts, approximations, and the limitations of the model, and the accuracy of coincident measurements of environmental and acoustic parameters required to validate the model are discussed. To illustrate the predictions and accuracy of the model under diverse ice conditions, several comparisons of theoretical and experimental determinations of under-ice transmission loss in the central Arctic Ocean are presented. |
format |
Other/Unknown Material |
author |
Diachok, Orest I. |
author_facet |
Diachok, Orest I. |
author_sort |
Diachok, Orest I. |
title |
Effects of sea-ice ridges on sound propagation in the Arctic Ocean |
title_short |
Effects of sea-ice ridges on sound propagation in the Arctic Ocean |
title_full |
Effects of sea-ice ridges on sound propagation in the Arctic Ocean |
title_fullStr |
Effects of sea-ice ridges on sound propagation in the Arctic Ocean |
title_full_unstemmed |
Effects of sea-ice ridges on sound propagation in the Arctic Ocean |
title_sort |
effects of sea-ice ridges on sound propagation in the arctic ocean |
publisher |
NATO. SACLANTCEN |
publishDate |
1975 |
url |
https://hdl.handle.net/20.500.12489/717 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_source |
In: Ocean Acoustic Modelling (SACLANTCEN Conference Proceedings CP-17), Part 3, 1975, pp. 9-1 - 9-26. |
op_relation |
304 CP-17/3 http://hdl.handle.net/20.500.12489/717 |
op_doi |
https://doi.org/20.500.12489/717 |
_version_ |
1766309896879341568 |