Wave attenuation in the marginal ice zone during LIMEX
The effect of ice cover on ocean-wave attenuation is investigated for waves under flexure in the marginal ice zone (MIZ) with SAR image spectra and the results of models. Directional wavenumber spectra are taken from the SAR image data, and the wave-attenuation rate is evaluated with SAR image spect...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19920067728 2023-05-15T16:40:54+02:00 Wave attenuation in the marginal ice zone during LIMEX Liu, Antony K. Vachon, Paris W. Peng, Chih Y. Bhogal, A. S. Unclassified, Unlimited, Publicly available Jun 1, 1992 http://ntrs.nasa.gov/search.jsp?R=19920067728 unknown http://ntrs.nasa.gov/search.jsp?R=19920067728 Accession ID: 92A50352 Copyright Other Sources 48 Atmosphere - Ocean; 30; 2, Ju; 192-206 1992 ftnasantrs 2012-02-15T19:38:12Z The effect of ice cover on ocean-wave attenuation is investigated for waves under flexure in the marginal ice zone (MIZ) with SAR image spectra and the results of models. Directional wavenumber spectra are taken from the SAR image data, and the wave-attenuation rate is evaluated with SAR image spectra and by means of the model by Liu and Mollo-Christensen (1988). Eddy viscosity is described by means of dimensional analysis as a function of ice roughness and wave-induced velocity, and comparisons are made with the remotely sensed data. The model corrects the open-water model by introducing the effects of a continuous ice sheet, and turbulent eddy viscosity is shown to depend on ice thickness, floe sizes, significant wave height, and wave period. SAR and wave-buoy data support the trends described in the model results, and a characteristic rollover is noted in the model and experimental wave-attenuation rates at high wavenumbers. Other/Unknown Material Ice Sheet NASA Technical Reports Server (NTRS) Christensen ENVELOPE(47.867,47.867,-67.967,-67.967) |
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Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
48 |
spellingShingle |
48 Liu, Antony K. Vachon, Paris W. Peng, Chih Y. Bhogal, A. S. Wave attenuation in the marginal ice zone during LIMEX |
topic_facet |
48 |
description |
The effect of ice cover on ocean-wave attenuation is investigated for waves under flexure in the marginal ice zone (MIZ) with SAR image spectra and the results of models. Directional wavenumber spectra are taken from the SAR image data, and the wave-attenuation rate is evaluated with SAR image spectra and by means of the model by Liu and Mollo-Christensen (1988). Eddy viscosity is described by means of dimensional analysis as a function of ice roughness and wave-induced velocity, and comparisons are made with the remotely sensed data. The model corrects the open-water model by introducing the effects of a continuous ice sheet, and turbulent eddy viscosity is shown to depend on ice thickness, floe sizes, significant wave height, and wave period. SAR and wave-buoy data support the trends described in the model results, and a characteristic rollover is noted in the model and experimental wave-attenuation rates at high wavenumbers. |
format |
Other/Unknown Material |
author |
Liu, Antony K. Vachon, Paris W. Peng, Chih Y. Bhogal, A. S. |
author_facet |
Liu, Antony K. Vachon, Paris W. Peng, Chih Y. Bhogal, A. S. |
author_sort |
Liu, Antony K. |
title |
Wave attenuation in the marginal ice zone during LIMEX |
title_short |
Wave attenuation in the marginal ice zone during LIMEX |
title_full |
Wave attenuation in the marginal ice zone during LIMEX |
title_fullStr |
Wave attenuation in the marginal ice zone during LIMEX |
title_full_unstemmed |
Wave attenuation in the marginal ice zone during LIMEX |
title_sort |
wave attenuation in the marginal ice zone during limex |
publishDate |
1992 |
url |
http://ntrs.nasa.gov/search.jsp?R=19920067728 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(47.867,47.867,-67.967,-67.967) |
geographic |
Christensen |
geographic_facet |
Christensen |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19920067728 Accession ID: 92A50352 |
op_rights |
Copyright |
_version_ |
1766031333819154432 |