Measured and modeled acoustic propagation underneath the rough Arctic sea-ice
Measured and modeled acoustic propagation underneath the rough Arctic sea-ice
| dc.contributor.author | Hope, Gaute | |
| dc.contributor.author | Sagen, Hanne | |
| dc.contributor.author | Storheim, Espen | |
| dc.contributor.author | Hobæk, Halvor | |
| dc.contributor.author | Freitag, Lee | |
| dc.date.accessioned | 2017-10-11T16:02:20Z | |
| dc.date.available | 2017-10-11T16:02:20Z | |
| dc.date.issued | 2017-09-26 | |
| dc.description | Author Posting. © Acoustical Society of America, 2017. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 142 (2017): 1619-1633, doi:10.1121/1.5003786. | en_US |
| dc.description.abstract | 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. | en_US |
| dc.description.sponsorship | The fieldwork was performed under funding from the Research Council of Norway through the UNDER-ICE (Grant No. 226373) project and ENGIE E&P Norway providing additional support. The data analysis, modeling and preparation of the publication has been carried out under funding from the Office of Naval Research (Global) (Grant No. N62909-14-1-NO33) and UNDER ICE (Grant No. 226373) projects. The U.S. Office of Naval Research provided partial support for this work under Grant No. N000141210176 to the Woods Hole Oceanographic Institution. | en_US |
| dc.identifier.citation | Journal of the Acoustical Society of America 142 (2017): 1619-1633 | en_US |
| dc.identifier.doi | 10.1121/1.5003786 | |
| dc.identifier.uri | https://hdl.handle.net/1912/9293 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Acoustical Society of America | en_US |
| dc.relation.uri | https://doi.org/10.1121/1.5003786 | |
| dc.title | Measured and modeled acoustic propagation underneath the rough Arctic sea-ice | en_US |
| dc.type | Article | en_US |
| dspace.entity.type | Publication | |
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