期刊
INTERNATIONAL JOURNAL OF OFFSHORE AND POLAR ENGINEERING
卷 31, 期 3, 页码 263-269出版社
INT SOC OFFSHORE POLAR ENGINEERS
DOI: 10.17736/ijope.2021.ik08
关键词
Waves in ice; wave-ice interaction; sea ice; marginal ice zone; pancake ice
资金
- Australian Research Council [LE140100079]
- Antarctic Circumnavigation Expedition Foundation
- Ferring Pharmaceuticals
- Japanese Society for the Promotion of Science [PE19055]
- Australia Research Council [DP200102828, FT190100404]
- Australian Antarctic Science Program [4434]
- Swinburne University Postgraduate Research Award
- Nortek AS
- Air-Sea-Ice Lab Project
- Australian Research Council [DP200102828, LE140100079, FT190100404] Funding Source: Australian Research Council
A physical model was discussed to simulate the interaction between ocean waves and loose pancake ice floes. Experiments showed that wave attenuation increases with ice concentration, resulting in a weakening of wave energy across the entire spectral domain.
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.
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