Spectral wave energy dissipation due to under-ice turbulence
Dissipation within the turbulent boundary layer under sea ice is one of many processes contributing to wave energy attenuation in ice-covered seas. Although recent observations suggest that the contribution of that process to the total energy dissipation is significant, its parameterizations used in...
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ftdatacite:10.48550/arxiv.2007.14656 2023-05-15T18:17:16+02:00 Spectral wave energy dissipation due to under-ice turbulence Herman, Agnieszka 2020 https://dx.doi.org/10.48550/arxiv.2007.14656 https://arxiv.org/abs/2007.14656 unknown arXiv https://dx.doi.org/10.1175/jpo-d-20-0171.1 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Atmospheric and Oceanic Physics physics.ao-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 2020 ftdatacite https://doi.org/10.48550/arxiv.2007.14656 https://doi.org/10.1175/jpo-d-20-0171.1 2022-03-10T15:43:29Z Dissipation within the turbulent boundary layer under sea ice is one of many processes contributing to wave energy attenuation in ice-covered seas. Although recent observations suggest that the contribution of that process to the total energy dissipation is significant, its parameterizations used in spectral wave models are based on fairly crude, heuristic approximations. In this paper, an improved source term for the under-ice turbulent dissipation is proposed, taking into account the spectral nature of that process (as opposed to parameterizations based on the so-called representative wave), as well as effects related to sea ice concentration and floe-size distribution, formulated on the basis of the earlier results of discrete-element modeling. The core of the new source term is based on an analogous model for dissipation due to bottom friction derived by Weber in 1991 (https://doi.org/10.1017/S0022112091003634). The shape of the wave energy attenuation curves and frequency-dependence of the attenuation coefficients are analyzed in detail for compact sea ice. The role of floe size in modifying the attenuation intensity and spectral distribution is illustrated by calibrating the model to observational data from a sudden sea ice break-up event in the marginal ice zone. : Manuscript accepted at Journal of Physical Oceanography Article in Journal/Newspaper Sea ice DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Atmospheric and Oceanic Physics physics.ao-ph FOS Physical sciences |
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Atmospheric and Oceanic Physics physics.ao-ph FOS Physical sciences Herman, Agnieszka Spectral wave energy dissipation due to under-ice turbulence |
topic_facet |
Atmospheric and Oceanic Physics physics.ao-ph FOS Physical sciences |
description |
Dissipation within the turbulent boundary layer under sea ice is one of many processes contributing to wave energy attenuation in ice-covered seas. Although recent observations suggest that the contribution of that process to the total energy dissipation is significant, its parameterizations used in spectral wave models are based on fairly crude, heuristic approximations. In this paper, an improved source term for the under-ice turbulent dissipation is proposed, taking into account the spectral nature of that process (as opposed to parameterizations based on the so-called representative wave), as well as effects related to sea ice concentration and floe-size distribution, formulated on the basis of the earlier results of discrete-element modeling. The core of the new source term is based on an analogous model for dissipation due to bottom friction derived by Weber in 1991 (https://doi.org/10.1017/S0022112091003634). The shape of the wave energy attenuation curves and frequency-dependence of the attenuation coefficients are analyzed in detail for compact sea ice. The role of floe size in modifying the attenuation intensity and spectral distribution is illustrated by calibrating the model to observational data from a sudden sea ice break-up event in the marginal ice zone. : Manuscript accepted at Journal of Physical Oceanography |
format |
Article in Journal/Newspaper |
author |
Herman, Agnieszka |
author_facet |
Herman, Agnieszka |
author_sort |
Herman, Agnieszka |
title |
Spectral wave energy dissipation due to under-ice turbulence |
title_short |
Spectral wave energy dissipation due to under-ice turbulence |
title_full |
Spectral wave energy dissipation due to under-ice turbulence |
title_fullStr |
Spectral wave energy dissipation due to under-ice turbulence |
title_full_unstemmed |
Spectral wave energy dissipation due to under-ice turbulence |
title_sort |
spectral wave energy dissipation due to under-ice turbulence |
publisher |
arXiv |
publishDate |
2020 |
url |
https://dx.doi.org/10.48550/arxiv.2007.14656 https://arxiv.org/abs/2007.14656 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
https://dx.doi.org/10.1175/jpo-d-20-0171.1 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.2007.14656 https://doi.org/10.1175/jpo-d-20-0171.1 |
_version_ |
1766191384803409920 |