A physical model of wave attenuation in pancake ice

Alberto Alberello, Azam Dolatshah, Luke G. Bennetts, Miguel Onorato, Filippo Nelli, Alessandro Toffoli

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)263-269
Number of pages7
JournalInternational Journal of Offshore and Polar Engineering
Volume31
Issue number3
DOIs
Publication statusPublished - Sep 2021
Externally publishedYes

Keywords

  • Marginal ice zone
  • Pancake ice
  • Sea ice
  • Waves in ice
  • Wave–ice interaction

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