Broadband acoustic backscatter from crude oil under laboratory-grown sea ice
In ice-covered seas, traditional air-side oil spill detection methods face practical challenges. Conversely, under-ice remote sensing techniques are increasingly viable due to improving operational capabilities of autonomous and remotely operated vehicles. To investigate the potential for under-ice...
Published in: | The Journal of the Acoustical Society of America |
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Online Access: | http://nora.nerc.ac.uk/id/eprint/514907/ https://doi.org/10.1121/1.4963876 |
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ftnerc:oai:nora.nerc.ac.uk:514907 2023-05-15T18:17:52+02:00 Broadband acoustic backscatter from crude oil under laboratory-grown sea ice Bassett, Christopher Lavery, Andone C. Maksym, Ted Wilkinson, Jeremy P. 2016-10 http://nora.nerc.ac.uk/id/eprint/514907/ https://doi.org/10.1121/1.4963876 unknown Acoustical Society of America Bassett, Christopher; Lavery, Andone C.; Maksym, Ted; Wilkinson, Jeremy P. 2016 Broadband acoustic backscatter from crude oil under laboratory-grown sea ice. The Journal of the Acoustical Society of America, 140 (4). 2274-2287. https://doi.org/10.1121/1.4963876 <https://doi.org/10.1121/1.4963876> Publication - Article PeerReviewed 2016 ftnerc https://doi.org/10.1121/1.4963876 2023-02-04T19:43:48Z In ice-covered seas, traditional air-side oil spill detection methods face practical challenges. Conversely, under-ice remote sensing techniques are increasingly viable due to improving operational capabilities of autonomous and remotely operated vehicles. To investigate the potential for under-ice detection of oil spills using active acoustics, laboratory measurements of high-frequency, broadband backscatter (75–590 kHz) from crude oil layers (0.7–8.1 cm) under and encapsulated within sea ice were performed at normal and 20° incidence angles. Discrete interfaces (water-oil, oil-ice, and ice-oil) are identifiable in observations following oil injections under the ice and during the subsequent encapsulation. A one-dimensional model for the total normal incidence backscatter from oil under ice, constrained by oil sound speed measurements from −10 °C to 20 °C and improved environmental measurements compared to previous studies, agrees well with pre-encapsulation observations. At 20° incidence angles echoes from the ice and oil under ice are more complex and spatially variable than normal incidence observations, most likely due to interface roughness and volume inhomogeneities. Encapsulated oil layers are only detected at normal incidence. The results suggest that high-frequency, broadband backscatter techniques may allow under-ice remote sensing for the detection and quantification of oil spills. Article in Journal/Newspaper Sea ice Natural Environment Research Council: NERC Open Research Archive The Journal of the Acoustical Society of America 140 4 2274 2287 |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
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description |
In ice-covered seas, traditional air-side oil spill detection methods face practical challenges. Conversely, under-ice remote sensing techniques are increasingly viable due to improving operational capabilities of autonomous and remotely operated vehicles. To investigate the potential for under-ice detection of oil spills using active acoustics, laboratory measurements of high-frequency, broadband backscatter (75–590 kHz) from crude oil layers (0.7–8.1 cm) under and encapsulated within sea ice were performed at normal and 20° incidence angles. Discrete interfaces (water-oil, oil-ice, and ice-oil) are identifiable in observations following oil injections under the ice and during the subsequent encapsulation. A one-dimensional model for the total normal incidence backscatter from oil under ice, constrained by oil sound speed measurements from −10 °C to 20 °C and improved environmental measurements compared to previous studies, agrees well with pre-encapsulation observations. At 20° incidence angles echoes from the ice and oil under ice are more complex and spatially variable than normal incidence observations, most likely due to interface roughness and volume inhomogeneities. Encapsulated oil layers are only detected at normal incidence. The results suggest that high-frequency, broadband backscatter techniques may allow under-ice remote sensing for the detection and quantification of oil spills. |
format |
Article in Journal/Newspaper |
author |
Bassett, Christopher Lavery, Andone C. Maksym, Ted Wilkinson, Jeremy P. |
spellingShingle |
Bassett, Christopher Lavery, Andone C. Maksym, Ted Wilkinson, Jeremy P. Broadband acoustic backscatter from crude oil under laboratory-grown sea ice |
author_facet |
Bassett, Christopher Lavery, Andone C. Maksym, Ted Wilkinson, Jeremy P. |
author_sort |
Bassett, Christopher |
title |
Broadband acoustic backscatter from crude oil under laboratory-grown sea ice |
title_short |
Broadband acoustic backscatter from crude oil under laboratory-grown sea ice |
title_full |
Broadband acoustic backscatter from crude oil under laboratory-grown sea ice |
title_fullStr |
Broadband acoustic backscatter from crude oil under laboratory-grown sea ice |
title_full_unstemmed |
Broadband acoustic backscatter from crude oil under laboratory-grown sea ice |
title_sort |
broadband acoustic backscatter from crude oil under laboratory-grown sea ice |
publisher |
Acoustical Society of America |
publishDate |
2016 |
url |
http://nora.nerc.ac.uk/id/eprint/514907/ https://doi.org/10.1121/1.4963876 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
Bassett, Christopher; Lavery, Andone C.; Maksym, Ted; Wilkinson, Jeremy P. 2016 Broadband acoustic backscatter from crude oil under laboratory-grown sea ice. The Journal of the Acoustical Society of America, 140 (4). 2274-2287. https://doi.org/10.1121/1.4963876 <https://doi.org/10.1121/1.4963876> |
op_doi |
https://doi.org/10.1121/1.4963876 |
container_title |
The Journal of the Acoustical Society of America |
container_volume |
140 |
container_issue |
4 |
container_start_page |
2274 |
op_container_end_page |
2287 |
_version_ |
1766193286572146688 |