Measured and modeled acoustic propagation underneath the rough Arctic sea-ice
A characteristic surface duct beneath the sea-ice in the Marginal Ice Zone causes acoustic waves to be trapped and continuously interact with the sea-ice. The reflectivity of the sea-ice depends on the thickness, the elastic properties, and its roughness. This work focuses on the influence of sea-ic...
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Online Access: | https://hdl.handle.net/1956/18858 https://doi.org/10.1121/1.5003786 |
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ftunivbergen:oai:bora.uib.no:1956/18858 2023-05-15T14:23:34+02:00 Measured and modeled acoustic propagation underneath the rough Arctic sea-ice Hope, Gaute Sagen, Hanne Storheim, Espen Hobæk, Halvor Freitag, Lee 2017-09 application/pdf https://hdl.handle.net/1956/18858 https://doi.org/10.1121/1.5003786 eng eng Acoustical Society of America Acoustic Propagation Underneath the Arctic Sea-ice urn:issn:0001-4966 https://hdl.handle.net/1956/18858 https://doi.org/10.1121/1.5003786 cristin:1499146 Copyright 2017 Acoustical Society of America Journal of the Acoustical Society of America 142 3 1619-1633 Peer reviewed Journal article 2017 ftunivbergen https://doi.org/10.1121/1.5003786 2023-03-14T17:41:16Z A characteristic surface duct beneath the sea-ice in the Marginal Ice Zone causes acoustic waves to be trapped and continuously interact with the sea-ice. The reflectivity of the sea-ice depends on the thickness, the elastic properties, and its roughness. This work focuses on the influence of sea-ice roughness on long-range acoustic propagation, and on how well the arrival structure can be predicted by the full wave integration model OASES. In 2013, acoustic signals centered at 900 Hz were transmitted every hour for three days between ice-tethered buoys in a drifting network in the Fram Strait. The experiment was set up to study the signal stability in the surface channel below the sea-ice. Oceanographic profiles were collected during the experiment, while a statistical description of the rough sea-ice was established based on historical ice-draft measurements. This environmental description is used as input to the range independent version of OASES. The model simulations correspond fairly well with the observations, despite that a flat bathymetry is used and the sea-ice roughness cannot be fully approximated by the statistical representation used in OASES. Longrange transmissions around 900 Hz are found to be more sensitive to the sea-ice roughness than the elastic parameters. publishedVersion Article in Journal/Newspaper Arctic Arctic Fram Strait Sea ice University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic The Journal of the Acoustical Society of America 142 3 1619 1633 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
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ftunivbergen |
language |
English |
description |
A characteristic surface duct beneath the sea-ice in the Marginal Ice Zone causes acoustic waves to be trapped and continuously interact with the sea-ice. The reflectivity of the sea-ice depends on the thickness, the elastic properties, and its roughness. This work focuses on the influence of sea-ice roughness on long-range acoustic propagation, and on how well the arrival structure can be predicted by the full wave integration model OASES. In 2013, acoustic signals centered at 900 Hz were transmitted every hour for three days between ice-tethered buoys in a drifting network in the Fram Strait. The experiment was set up to study the signal stability in the surface channel below the sea-ice. Oceanographic profiles were collected during the experiment, while a statistical description of the rough sea-ice was established based on historical ice-draft measurements. This environmental description is used as input to the range independent version of OASES. The model simulations correspond fairly well with the observations, despite that a flat bathymetry is used and the sea-ice roughness cannot be fully approximated by the statistical representation used in OASES. Longrange transmissions around 900 Hz are found to be more sensitive to the sea-ice roughness than the elastic parameters. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Hope, Gaute Sagen, Hanne Storheim, Espen Hobæk, Halvor Freitag, Lee |
spellingShingle |
Hope, Gaute Sagen, Hanne Storheim, Espen Hobæk, Halvor Freitag, Lee Measured and modeled acoustic propagation underneath the rough Arctic sea-ice |
author_facet |
Hope, Gaute Sagen, Hanne Storheim, Espen Hobæk, Halvor Freitag, Lee |
author_sort |
Hope, Gaute |
title |
Measured and modeled acoustic propagation underneath the rough Arctic sea-ice |
title_short |
Measured and modeled acoustic propagation underneath the rough Arctic sea-ice |
title_full |
Measured and modeled acoustic propagation underneath the rough Arctic sea-ice |
title_fullStr |
Measured and modeled acoustic propagation underneath the rough Arctic sea-ice |
title_full_unstemmed |
Measured and modeled acoustic propagation underneath the rough Arctic sea-ice |
title_sort |
measured and modeled acoustic propagation underneath the rough arctic sea-ice |
publisher |
Acoustical Society of America |
publishDate |
2017 |
url |
https://hdl.handle.net/1956/18858 https://doi.org/10.1121/1.5003786 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Fram Strait Sea ice |
genre_facet |
Arctic Arctic Fram Strait Sea ice |
op_source |
Journal of the Acoustical Society of America 142 3 1619-1633 |
op_relation |
Acoustic Propagation Underneath the Arctic Sea-ice urn:issn:0001-4966 https://hdl.handle.net/1956/18858 https://doi.org/10.1121/1.5003786 cristin:1499146 |
op_rights |
Copyright 2017 Acoustical Society of America |
op_doi |
https://doi.org/10.1121/1.5003786 |
container_title |
The Journal of the Acoustical Society of America |
container_volume |
142 |
container_issue |
3 |
container_start_page |
1619 |
op_container_end_page |
1633 |
_version_ |
1766296090483621888 |