Airborne remote sensing of ocean wave directional wavenumber spectra in the marginal ice zone
Abstract Interactions between surface waves and sea ice are thought to be an important, but poorly understood, physical process in the atmosphere‐ice‐ocean system. In this work, airborne scanning lidar was used to observe ocean waves propagating into the marginal ice zone (MIZ). These represent the...
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| Format: | Article |
| Language: | English |
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Wiley
2016-05-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL067713 |
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| author | Peter Sutherland Jean‐Claude Gascard |
| author_facet | Peter Sutherland Jean‐Claude Gascard |
| author_sort | Peter Sutherland |
| collection | DOAJ |
| description | Abstract Interactions between surface waves and sea ice are thought to be an important, but poorly understood, physical process in the atmosphere‐ice‐ocean system. In this work, airborne scanning lidar was used to observe ocean waves propagating into the marginal ice zone (MIZ). These represent the first direct spatial measurements of the surface wavefield in the polar MIZ. Data were compared against two attenuation models, one based on viscous dissipation and one based on scattering. Both models were capable of reproducing the measured wave energy. The observed wavenumber dependence of attenuation was found to be consistent with viscous processes, while the spectral spreading of higher wavenumbers suggested a scattering mechanism. Both models reproduced a change in peak direction due to preferential directional filtering. Floe sizes were recorded using colocated visible imagery, and their distribution was found to be consistent with ice breakup by the wavefield. |
| format | Article |
| id | doaj-art-3be5f33b7e6841df8a1b7f1504da1f5e |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-3be5f33b7e6841df8a1b7f1504da1f5e2025-08-20T03:10:24ZengWileyGeophysical Research Letters0094-82761944-80072016-05-0143105151515910.1002/2016GL067713Airborne remote sensing of ocean wave directional wavenumber spectra in the marginal ice zonePeter Sutherland0Jean‐Claude Gascard1Laboratoire d'Océanographie Physique et Spatiale L'Institut Français de Recherche pour l'Exploitation de la Mer Plouzané FranceLaboratoire d'Océanographie et du Climat Université Pierre et Marie Curie Paris FranceAbstract Interactions between surface waves and sea ice are thought to be an important, but poorly understood, physical process in the atmosphere‐ice‐ocean system. In this work, airborne scanning lidar was used to observe ocean waves propagating into the marginal ice zone (MIZ). These represent the first direct spatial measurements of the surface wavefield in the polar MIZ. Data were compared against two attenuation models, one based on viscous dissipation and one based on scattering. Both models were capable of reproducing the measured wave energy. The observed wavenumber dependence of attenuation was found to be consistent with viscous processes, while the spectral spreading of higher wavenumbers suggested a scattering mechanism. Both models reproduced a change in peak direction due to preferential directional filtering. Floe sizes were recorded using colocated visible imagery, and their distribution was found to be consistent with ice breakup by the wavefield.https://doi.org/10.1002/2016GL067713wavessea icemarginal ice zoneice floescanning lidarattenuation |
| spellingShingle | Peter Sutherland Jean‐Claude Gascard Airborne remote sensing of ocean wave directional wavenumber spectra in the marginal ice zone Geophysical Research Letters waves sea ice marginal ice zone ice floe scanning lidar attenuation |
| title | Airborne remote sensing of ocean wave directional wavenumber spectra in the marginal ice zone |
| title_full | Airborne remote sensing of ocean wave directional wavenumber spectra in the marginal ice zone |
| title_fullStr | Airborne remote sensing of ocean wave directional wavenumber spectra in the marginal ice zone |
| title_full_unstemmed | Airborne remote sensing of ocean wave directional wavenumber spectra in the marginal ice zone |
| title_short | Airborne remote sensing of ocean wave directional wavenumber spectra in the marginal ice zone |
| title_sort | airborne remote sensing of ocean wave directional wavenumber spectra in the marginal ice zone |
| topic | waves sea ice marginal ice zone ice floe scanning lidar attenuation |
| url | https://doi.org/10.1002/2016GL067713 |
| work_keys_str_mv | AT petersutherland airborneremotesensingofoceanwavedirectionalwavenumberspectrainthemarginalicezone AT jeanclaudegascard airborneremotesensingofoceanwavedirectionalwavenumberspectrainthemarginalicezone |