Wave propagation in continuous sea ice:An experimental perspective
Ocean waves penetrate hundreds of kilometres into the icecovered ocean. Waves fracture the level ice into small floes, herd floes, introduce warm water and overwash the floes, accelerating ice melt and causing collisions, which concurrently erodes the floes and influences the large-scale deformation...
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American Society of Mechanical Engineers (ASME)
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:82559 2023-05-15T14:23:04+02:00 Wave propagation in continuous sea ice:An experimental perspective Passerotti, Giulio Alberello, Alberto Dolatshah, Azam Bennetts, Luke Puolakka, Otto Von Bock Und Polach, Franz Klein, Marco Hartmann, Moritz Monbaliu, Jaak Toffoli, Alessandro 2020 https://ueaeprints.uea.ac.uk/id/eprint/82559/ unknown American Society of Mechanical Engineers (ASME) Passerotti, Giulio, Alberello, Alberto, Dolatshah, Azam, Bennetts, Luke, Puolakka, Otto, Von Bock Und Polach, Franz, Klein, Marco, Hartmann, Moritz, Monbaliu, Jaak and Toffoli, Alessandro (2020) Wave propagation in continuous sea ice:An experimental perspective. In: Polar and Arctic Sciences and Technology. Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE. American Society of Mechanical Engineers (ASME), Virtual, Online. ISBN 9780791884393 Book Section NonPeerReviewed 2020 ftuniveastangl 2023-01-30T21:56:16Z Ocean waves penetrate hundreds of kilometres into the icecovered ocean. Waves fracture the level ice into small floes, herd floes, introduce warm water and overwash the floes, accelerating ice melt and causing collisions, which concurrently erodes the floes and influences the large-scale deformation. Concomitantly, interactions between waves and the sea ice cause wave energy to reduce with distance travelled into the ice cover, attenuating wave driven effects. Here a pilot experiment in the ice tank at Aalto University (Finland) is presented to discuss how the properties of irregular small amplitude (linear) waves change as they propagate through continuous model sea ice. Irregular waves with a JONSWAP spectral shape were mechanically generated with a very low initial wave steepness to avoid ice break up and maintain a consistent continuous ice cover throughout the experiments. Observations show an exponential attenuation of wave energy with distance. High frequency components attenuated more rapidly than the low frequency counterparts, in agreement with a frequency-cubed power-law. The more effective attenuation in the high frequency range induced a substantial downshift of the spectral peak, stretching the dominant wave component as it propagates in ice. Book Part Arctic Sea ice University of East Anglia: UEA Digital Repository |
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University of East Anglia: UEA Digital Repository |
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description |
Ocean waves penetrate hundreds of kilometres into the icecovered ocean. Waves fracture the level ice into small floes, herd floes, introduce warm water and overwash the floes, accelerating ice melt and causing collisions, which concurrently erodes the floes and influences the large-scale deformation. Concomitantly, interactions between waves and the sea ice cause wave energy to reduce with distance travelled into the ice cover, attenuating wave driven effects. Here a pilot experiment in the ice tank at Aalto University (Finland) is presented to discuss how the properties of irregular small amplitude (linear) waves change as they propagate through continuous model sea ice. Irregular waves with a JONSWAP spectral shape were mechanically generated with a very low initial wave steepness to avoid ice break up and maintain a consistent continuous ice cover throughout the experiments. Observations show an exponential attenuation of wave energy with distance. High frequency components attenuated more rapidly than the low frequency counterparts, in agreement with a frequency-cubed power-law. The more effective attenuation in the high frequency range induced a substantial downshift of the spectral peak, stretching the dominant wave component as it propagates in ice. |
format |
Book Part |
author |
Passerotti, Giulio Alberello, Alberto Dolatshah, Azam Bennetts, Luke Puolakka, Otto Von Bock Und Polach, Franz Klein, Marco Hartmann, Moritz Monbaliu, Jaak Toffoli, Alessandro |
spellingShingle |
Passerotti, Giulio Alberello, Alberto Dolatshah, Azam Bennetts, Luke Puolakka, Otto Von Bock Und Polach, Franz Klein, Marco Hartmann, Moritz Monbaliu, Jaak Toffoli, Alessandro Wave propagation in continuous sea ice:An experimental perspective |
author_facet |
Passerotti, Giulio Alberello, Alberto Dolatshah, Azam Bennetts, Luke Puolakka, Otto Von Bock Und Polach, Franz Klein, Marco Hartmann, Moritz Monbaliu, Jaak Toffoli, Alessandro |
author_sort |
Passerotti, Giulio |
title |
Wave propagation in continuous sea ice:An experimental perspective |
title_short |
Wave propagation in continuous sea ice:An experimental perspective |
title_full |
Wave propagation in continuous sea ice:An experimental perspective |
title_fullStr |
Wave propagation in continuous sea ice:An experimental perspective |
title_full_unstemmed |
Wave propagation in continuous sea ice:An experimental perspective |
title_sort |
wave propagation in continuous sea ice:an experimental perspective |
publisher |
American Society of Mechanical Engineers (ASME) |
publishDate |
2020 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/82559/ |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_relation |
Passerotti, Giulio, Alberello, Alberto, Dolatshah, Azam, Bennetts, Luke, Puolakka, Otto, Von Bock Und Polach, Franz, Klein, Marco, Hartmann, Moritz, Monbaliu, Jaak and Toffoli, Alessandro (2020) Wave propagation in continuous sea ice:An experimental perspective. In: Polar and Arctic Sciences and Technology. Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE. American Society of Mechanical Engineers (ASME), Virtual, Online. ISBN 9780791884393 |
_version_ |
1766295557282725888 |