Ocean waves across the Arctic: Attenuation due to dissipation dominates over scattering for periods longer than 19 s
Abstract The poorly understood attenuation of surface waves in sea ice is generally attributed to the combination of scattering and dissipation. Scattering and dissipation have very different effects on the directional and temporal distribution of wave energy, making it possible to better understand...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2016-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL068204 |
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| author | Fabrice Ardhuin Peter Sutherland Martin Doble Peter Wadhams |
| author_facet | Fabrice Ardhuin Peter Sutherland Martin Doble Peter Wadhams |
| author_sort | Fabrice Ardhuin |
| collection | DOAJ |
| description | Abstract The poorly understood attenuation of surface waves in sea ice is generally attributed to the combination of scattering and dissipation. Scattering and dissipation have very different effects on the directional and temporal distribution of wave energy, making it possible to better understand their relative importance by analysis of swell directional spreading and arrival times. Here we compare results of a spectral wave model—using adjustable scattering and dissipation attenuation formulations—with wave measurements far inside the ice pack. In this case, scattering plays a negligible role in the attenuation of long swells. Specifically, scattering‐dominated attenuation would produce directional wave spectra much broader than the ones recorded, and swell events arriving later and lasting much longer than observed. Details of the dissipation process remain uncertain. Average dissipation rates are consistent with creep effects but are 12 times those expected for a laminar boundary layer under a smooth solid ice plate. |
| format | Article |
| id | doaj-art-adbf72ead97042f19f7e0cbafed2fdee |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-adbf72ead97042f19f7e0cbafed2fdee2025-08-20T03:10:25ZengWileyGeophysical Research Letters0094-82761944-80072016-06-0143115775578310.1002/2016GL068204Ocean waves across the Arctic: Attenuation due to dissipation dominates over scattering for periods longer than 19 sFabrice Ardhuin0Peter Sutherland1Martin Doble2Peter Wadhams3University Brest, CNRS, IRD, Ifremer, Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM Brest FranceUniversity Brest, CNRS, IRD, Ifremer, Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM Brest FrancePolar Scientific Ltd Appin UKDepartment of Applied Maths and Theoretical Physics University of Cambridge Cambridge UKAbstract The poorly understood attenuation of surface waves in sea ice is generally attributed to the combination of scattering and dissipation. Scattering and dissipation have very different effects on the directional and temporal distribution of wave energy, making it possible to better understand their relative importance by analysis of swell directional spreading and arrival times. Here we compare results of a spectral wave model—using adjustable scattering and dissipation attenuation formulations—with wave measurements far inside the ice pack. In this case, scattering plays a negligible role in the attenuation of long swells. Specifically, scattering‐dominated attenuation would produce directional wave spectra much broader than the ones recorded, and swell events arriving later and lasting much longer than observed. Details of the dissipation process remain uncertain. Average dissipation rates are consistent with creep effects but are 12 times those expected for a laminar boundary layer under a smooth solid ice plate.https://doi.org/10.1002/2016GL068204ocean wavessea iceTaraDAMOCLES |
| spellingShingle | Fabrice Ardhuin Peter Sutherland Martin Doble Peter Wadhams Ocean waves across the Arctic: Attenuation due to dissipation dominates over scattering for periods longer than 19 s Geophysical Research Letters ocean waves sea ice Tara DAMOCLES |
| title | Ocean waves across the Arctic: Attenuation due to dissipation dominates over scattering for periods longer than 19 s |
| title_full | Ocean waves across the Arctic: Attenuation due to dissipation dominates over scattering for periods longer than 19 s |
| title_fullStr | Ocean waves across the Arctic: Attenuation due to dissipation dominates over scattering for periods longer than 19 s |
| title_full_unstemmed | Ocean waves across the Arctic: Attenuation due to dissipation dominates over scattering for periods longer than 19 s |
| title_short | Ocean waves across the Arctic: Attenuation due to dissipation dominates over scattering for periods longer than 19 s |
| title_sort | ocean waves across the arctic attenuation due to dissipation dominates over scattering for periods longer than 19 s |
| topic | ocean waves sea ice Tara DAMOCLES |
| url | https://doi.org/10.1002/2016GL068204 |
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