A physical model of wave attenuation in pancake ice

Alberello, Alberto, Dolatshah, Azam, Bennetts, Luke G., Onorato, Miguel, Nelli, Filippo and Toffoli, Alessandro (2021) A physical model of wave attenuation in pancake ice. International Journal of Offshore and Polar Engineering, 31 (3). pp. 263-269. ISSN 1053-5381

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Abstract

A physical model is discussed that mimics the interaction between ocean waves and a multitude of loose pancake ice floes, which form the outer edge of the Arctic and Antarctic marginal ice zones during winter sea ice formation. The pancakes were modeled by using ice cubes with different concentrations, while waves were generated mechanically. The ice cubes had a dimension of a few centimeters, which was two orders of magnitude smaller than the dominant wavelength. Experiments consisted of tracking the propagation of regular and irregular wave fields along the flume as they crossed the ice cover to measure the rate of ice-induced wave attenuation. Results indicate that wave attenuation increases with ice concentration with only 30% of energy allowed to pass through high-density covers. Wave energy is attenuated across the entire spectral domain and is strongest at high frequencies. This results in a downshift of the spectral peak.

Item Type: Article
Additional Information: Funding Information: The Australian Research Council funded the facility (LE140100079). AA and AT were funded by the Antarctic Circumnavigation Expedition Foundation and Ferring Pharmaceuticals. AA is supported by the Japanese Society for the Promotion of Science (PE19055). LGB is supported by the Australia Research Council (FT190100404). LGB and AT are supported by the Australia Research Council (DP200102828). AA, LGB, and AT are supported by the Australian Antarctic Science Program (Project 4434). AD is supported by Swinburne University Post-graduate Research Award and Nortek AS. The authors acknowledge Prof. J. Monty (University of Melbourne) for facilitating access to the experimental facility. AA, AD, FN, and AT acknowledge support from the Air-Sea-Ice Lab Project. Publisher Copyright: © 2021, International Society of Offshore and Polar Engineers. All rights reserved.
Uncontrolled Keywords: marginal ice zone,pancake ice,sea ice,waves in ice,wave–ice interaction,civil and structural engineering,ocean engineering,mechanical engineering ,/dk/atira/pure/subjectarea/asjc/2200/2205
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Depositing User: LivePure Connector
Date Deposited: 04 Dec 2021 01:41
Last Modified: 13 Jun 2022 09:30
URI: https://ueaeprints.uea.ac.uk/id/eprint/82541
DOI: 10.17736/ijope.2021.ik08

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