Acoustic Propagation Underneath the Arctic Sea-ice
The main objective of this project is to study the effect of sea-ice on underwater acoustic wave propagation. Three main parameters define how acoustic waves react to the presence of seaice: (i) the roughness of the underside of the sea-ice, (ii) the thickness of the sea-ice, and (iii) the elastic p...
Published in: | The Journal of the Acoustical Society of America |
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Language: | English |
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The University of Bergen
2018
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Online Access: | https://hdl.handle.net/1956/18860 |
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ftunivbergen:oai:bora.uib.no:1956/18860 2023-05-15T14:28:00+02:00 Acoustic Propagation Underneath the Arctic Sea-ice Hope, Gaute 2018-10-04 application/pdf https://hdl.handle.net/1956/18860 eng eng The University of Bergen Paper I: Hope, Gaute, Sagen, H., Storheim, E., Hobæk, H., Freitag, L., Measured and modeled acoustic propagation underneath the rough Arctic sea-ice, Journal of Acoustical Society of America 142, 3, 2017. The article is available at: http://hdl.handle.net/1956/18858 Paper II: Hope, Gaute, Schmidt, H. A Parallelization of the Wavenumber Integration Acoustic Modelling Package OASES. Journal of Acoustical Society of America 144, 3, 2018. The article is not available in BORA due to publisher restrictions. The published version is available at: https://doi.org/10.1121/1.5068023 Paper III: Johansen, Tor Arne, Ruud, B. O., Hope, G. Seismic on Floating Ice on Shallow Water: Observations and Modelling of Guided Wave Modes. Geophysics, in press. The article is not available in BORA due to publisher restrictions. The published version is available at: https://doi.org/10.1190/geo2018-0211.1 Paper IV: Hope, Gaute, Hobæk, H., Sagen, H. Geometry of Acoustic Communication Links in the Arctic, Proceedings of the Institute of Acoustics 38, 2016. The article is available in the main thesis. Paper V: Geyer, Florian, Sagen, H., Hope, G., Babiker, M., Worcester, P. F., Identification and quantification of soundscape components in the Marginal Ice Zone, Journal of Acoustical Society of America 139, 4, 2016. The article is available at: http://hdl.handle.net/1956/18859 https://hdl.handle.net/1956/18860 cristin:1620962 Attribution CC BY. This item's Creative Commons-license does not apply to the included articles in the thesis. http://creativecommons.org/licenses/by/4.0/ Copyright 2018 The Author. This does not apply to the included articles, please see the individual article. Doctoral thesis 2018 ftunivbergen https://doi.org/10.1121/1.506802310.1190/geo2018-0211.1 2023-03-14T17:42:42Z The main objective of this project is to study the effect of sea-ice on underwater acoustic wave propagation. Three main parameters define how acoustic waves react to the presence of seaice: (i) the roughness of the underside of the sea-ice, (ii) the thickness of the sea-ice, and (iii) the elastic parameters of the sea-ice determined by the material composition of the ice. To address the overall objective, field observations from the Marginal Ice Zone (MIZ) in the Fram Strait and from the Van Mijen-fjord were analysed and compared with simulations performed with the seismo-acoustic model OASES50. In the Fram Strait, long-range under-ice acoustic propagation was studied by sending communication signals (centered at 900 Hz) between two ice-tethered buoys. In this study the focus was to understand the effect of sea-ice roughness and thickness on the signal propagation. A seismic survey was conducted in the Van Mijen-fjord, providing observations for a detailed study of how low frequency acoustic and elastic waves (up to 100 Hz) interact with an ice plate. In both studies the OASES model was used for simulating the elastic wave propagation in the complex physical environments. The OASES model can be very computationally intensive for complex problems and a significant effort went into developing and implementing a parallel version of the model in order to vastly reduce the computation time. Doctoral or Postdoctoral Thesis Arctic Arctic Fram Strait Sea ice University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic The Journal of the Acoustical Society of America 144 3 1819 1819 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
The main objective of this project is to study the effect of sea-ice on underwater acoustic wave propagation. Three main parameters define how acoustic waves react to the presence of seaice: (i) the roughness of the underside of the sea-ice, (ii) the thickness of the sea-ice, and (iii) the elastic parameters of the sea-ice determined by the material composition of the ice. To address the overall objective, field observations from the Marginal Ice Zone (MIZ) in the Fram Strait and from the Van Mijen-fjord were analysed and compared with simulations performed with the seismo-acoustic model OASES50. In the Fram Strait, long-range under-ice acoustic propagation was studied by sending communication signals (centered at 900 Hz) between two ice-tethered buoys. In this study the focus was to understand the effect of sea-ice roughness and thickness on the signal propagation. A seismic survey was conducted in the Van Mijen-fjord, providing observations for a detailed study of how low frequency acoustic and elastic waves (up to 100 Hz) interact with an ice plate. In both studies the OASES model was used for simulating the elastic wave propagation in the complex physical environments. The OASES model can be very computationally intensive for complex problems and a significant effort went into developing and implementing a parallel version of the model in order to vastly reduce the computation time. |
format |
Doctoral or Postdoctoral Thesis |
author |
Hope, Gaute |
spellingShingle |
Hope, Gaute Acoustic Propagation Underneath the Arctic Sea-ice |
author_facet |
Hope, Gaute |
author_sort |
Hope, Gaute |
title |
Acoustic Propagation Underneath the Arctic Sea-ice |
title_short |
Acoustic Propagation Underneath the Arctic Sea-ice |
title_full |
Acoustic Propagation Underneath the Arctic Sea-ice |
title_fullStr |
Acoustic Propagation Underneath the Arctic Sea-ice |
title_full_unstemmed |
Acoustic Propagation Underneath the Arctic Sea-ice |
title_sort |
acoustic propagation underneath the arctic sea-ice |
publisher |
The University of Bergen |
publishDate |
2018 |
url |
https://hdl.handle.net/1956/18860 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Fram Strait Sea ice |
genre_facet |
Arctic Arctic Fram Strait Sea ice |
op_relation |
Paper I: Hope, Gaute, Sagen, H., Storheim, E., Hobæk, H., Freitag, L., Measured and modeled acoustic propagation underneath the rough Arctic sea-ice, Journal of Acoustical Society of America 142, 3, 2017. The article is available at: http://hdl.handle.net/1956/18858 Paper II: Hope, Gaute, Schmidt, H. A Parallelization of the Wavenumber Integration Acoustic Modelling Package OASES. Journal of Acoustical Society of America 144, 3, 2018. The article is not available in BORA due to publisher restrictions. The published version is available at: https://doi.org/10.1121/1.5068023 Paper III: Johansen, Tor Arne, Ruud, B. O., Hope, G. Seismic on Floating Ice on Shallow Water: Observations and Modelling of Guided Wave Modes. Geophysics, in press. The article is not available in BORA due to publisher restrictions. The published version is available at: https://doi.org/10.1190/geo2018-0211.1 Paper IV: Hope, Gaute, Hobæk, H., Sagen, H. Geometry of Acoustic Communication Links in the Arctic, Proceedings of the Institute of Acoustics 38, 2016. The article is available in the main thesis. Paper V: Geyer, Florian, Sagen, H., Hope, G., Babiker, M., Worcester, P. F., Identification and quantification of soundscape components in the Marginal Ice Zone, Journal of Acoustical Society of America 139, 4, 2016. The article is available at: http://hdl.handle.net/1956/18859 https://hdl.handle.net/1956/18860 cristin:1620962 |
op_rights |
Attribution CC BY. This item's Creative Commons-license does not apply to the included articles in the thesis. http://creativecommons.org/licenses/by/4.0/ Copyright 2018 The Author. This does not apply to the included articles, please see the individual article. |
op_doi |
https://doi.org/10.1121/1.506802310.1190/geo2018-0211.1 |
container_title |
The Journal of the Acoustical Society of America |
container_volume |
144 |
container_issue |
3 |
container_start_page |
1819 |
op_container_end_page |
1819 |
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1766302126749777920 |