Wave Attenuation Through an Arctic Marginal Ice Zone on 12 October 2015: 2. Numerical Modeling of Waves and Associated Ice Breakup
Many processes that affect ocean surface gravity waves in sea ice give rise to attenuation rates that vary with both wave frequency and amplitude. Here we particularly test the possible effects of basal friction, scattering by ice floes, and dissipation in the ice layer due to dislocations, and ice...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://hal.science/hal-02927486 https://doi.org/10.1002/2018JC013784 |
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ftunivbrest:oai:HAL:hal-02927486v1 2023-05-15T15:00:28+02:00 Wave Attenuation Through an Arctic Marginal Ice Zone on 12 October 2015: 2. Numerical Modeling of Waves and Associated Ice Breakup Ardhuin, Fabrice Boutin, Guillaume Stopa, Justin Girard-Ardhuin, Fanny Melsheimer, Christian Thomson, Jim Kohout, Alison Doble, Martin Wadhams, Peter Centre National de la Recherche Scientifique (CNRS) Universität Bremen EU-FP7 project SWARP 607476 ONR grant NO001416WX01117 CNESCentre National D'etudes Spatiales LabexMer ANR-10-LABX-19-01 Copernicus Marine Environment Monitoring Service (CMEMS) as part of the Service Evolution program NSFNational Science Foundation (NSF) 2018 https://hal.science/hal-02927486 https://doi.org/10.1002/2018JC013784 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1002/2018JC013784 hal-02927486 https://hal.science/hal-02927486 doi:10.1002/2018JC013784 ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-02927486 Journal of Geophysical Research. Oceans, 2018, 123 (8), pp.5652-5668. ⟨10.1002/2018JC013784⟩ wind-waves sea ice WAVEWATCH III SAR Beaufort Arctic [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology info:eu-repo/semantics/article Journal articles 2018 ftunivbrest https://doi.org/10.1002/2018JC013784 2023-02-14T23:53:32Z Many processes that affect ocean surface gravity waves in sea ice give rise to attenuation rates that vary with both wave frequency and amplitude. Here we particularly test the possible effects of basal friction, scattering by ice floes, and dissipation in the ice layer due to dislocations, and ice breakup by the waves. The possible influence of these processes is evaluated in the marginal ice zone of the Beaufort Sea, where extensive wave measurements were performed. The wave data includes in situ measurements and the first kilometer-scale map of wave heights provided by Sentinel-1 SAR imagery on 12 October 2015, up to 400 km into the ice. We find that viscous friction at the base of an ice layer gives a dissipation rate that may be too large near the ice edge, where ice is mostly in the form of pancakes. Further into the ice, where larger floes are present, basal friction is not sufficient to account for the observed attenuation. In both regions, the observed narrow directional wave spectra are consistent with a parameterization that gives a weak effect of wave scattering by ice floes. For this particular event, with a dominant wave period around 10 s, we propose that wave attenuation is caused by ice flexure combined with basal friction that is reduced when the ice layer is not continuous. This combination gives realistic wave heights, associated with a 100-200 km wide region over which the ice is broken by waves, as observed in SAR imagery. Article in Journal/Newspaper Arctic Beaufort Sea Sea ice Université de Bretagne Occidentale: HAL Arctic Journal of Geophysical Research: Oceans 123 8 5652 5668 |
institution |
Open Polar |
collection |
Université de Bretagne Occidentale: HAL |
op_collection_id |
ftunivbrest |
language |
English |
topic |
wind-waves sea ice WAVEWATCH III SAR Beaufort Arctic [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology |
spellingShingle |
wind-waves sea ice WAVEWATCH III SAR Beaufort Arctic [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology Ardhuin, Fabrice Boutin, Guillaume Stopa, Justin Girard-Ardhuin, Fanny Melsheimer, Christian Thomson, Jim Kohout, Alison Doble, Martin Wadhams, Peter Wave Attenuation Through an Arctic Marginal Ice Zone on 12 October 2015: 2. Numerical Modeling of Waves and Associated Ice Breakup |
topic_facet |
wind-waves sea ice WAVEWATCH III SAR Beaufort Arctic [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology |
description |
Many processes that affect ocean surface gravity waves in sea ice give rise to attenuation rates that vary with both wave frequency and amplitude. Here we particularly test the possible effects of basal friction, scattering by ice floes, and dissipation in the ice layer due to dislocations, and ice breakup by the waves. The possible influence of these processes is evaluated in the marginal ice zone of the Beaufort Sea, where extensive wave measurements were performed. The wave data includes in situ measurements and the first kilometer-scale map of wave heights provided by Sentinel-1 SAR imagery on 12 October 2015, up to 400 km into the ice. We find that viscous friction at the base of an ice layer gives a dissipation rate that may be too large near the ice edge, where ice is mostly in the form of pancakes. Further into the ice, where larger floes are present, basal friction is not sufficient to account for the observed attenuation. In both regions, the observed narrow directional wave spectra are consistent with a parameterization that gives a weak effect of wave scattering by ice floes. For this particular event, with a dominant wave period around 10 s, we propose that wave attenuation is caused by ice flexure combined with basal friction that is reduced when the ice layer is not continuous. This combination gives realistic wave heights, associated with a 100-200 km wide region over which the ice is broken by waves, as observed in SAR imagery. |
author2 |
Centre National de la Recherche Scientifique (CNRS) Universität Bremen EU-FP7 project SWARP 607476 ONR grant NO001416WX01117 CNESCentre National D'etudes Spatiales LabexMer ANR-10-LABX-19-01 Copernicus Marine Environment Monitoring Service (CMEMS) as part of the Service Evolution program NSFNational Science Foundation (NSF) |
format |
Article in Journal/Newspaper |
author |
Ardhuin, Fabrice Boutin, Guillaume Stopa, Justin Girard-Ardhuin, Fanny Melsheimer, Christian Thomson, Jim Kohout, Alison Doble, Martin Wadhams, Peter |
author_facet |
Ardhuin, Fabrice Boutin, Guillaume Stopa, Justin Girard-Ardhuin, Fanny Melsheimer, Christian Thomson, Jim Kohout, Alison Doble, Martin Wadhams, Peter |
author_sort |
Ardhuin, Fabrice |
title |
Wave Attenuation Through an Arctic Marginal Ice Zone on 12 October 2015: 2. Numerical Modeling of Waves and Associated Ice Breakup |
title_short |
Wave Attenuation Through an Arctic Marginal Ice Zone on 12 October 2015: 2. Numerical Modeling of Waves and Associated Ice Breakup |
title_full |
Wave Attenuation Through an Arctic Marginal Ice Zone on 12 October 2015: 2. Numerical Modeling of Waves and Associated Ice Breakup |
title_fullStr |
Wave Attenuation Through an Arctic Marginal Ice Zone on 12 October 2015: 2. Numerical Modeling of Waves and Associated Ice Breakup |
title_full_unstemmed |
Wave Attenuation Through an Arctic Marginal Ice Zone on 12 October 2015: 2. Numerical Modeling of Waves and Associated Ice Breakup |
title_sort |
wave attenuation through an arctic marginal ice zone on 12 october 2015: 2. numerical modeling of waves and associated ice breakup |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-02927486 https://doi.org/10.1002/2018JC013784 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Beaufort Sea Sea ice |
genre_facet |
Arctic Beaufort Sea Sea ice |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-02927486 Journal of Geophysical Research. Oceans, 2018, 123 (8), pp.5652-5668. ⟨10.1002/2018JC013784⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2018JC013784 hal-02927486 https://hal.science/hal-02927486 doi:10.1002/2018JC013784 |
op_doi |
https://doi.org/10.1002/2018JC013784 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
123 |
container_issue |
8 |
container_start_page |
5652 |
op_container_end_page |
5668 |
_version_ |
1766332571253211136 |