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Wave-Ice Interactions (Hayley Shen) $BH/I=MW;]!'(B
Wave and sea ice interaction will be discussed under three topics: Wave attenuation, Ice drift and thickening, and Formation process of pancake ice. First, wave attenuation under an ice cover has been identified to result from four distinct processes: bending, scattering, eddy viscosity, and floe-floe collisions. Study of the fourth process is recent. This mechanism and its comparison with the other known dissipation mechanisms will be given. Second, ice drift under wave action from the scattering theory as well as from the collision theory is shown to be comparable with wind drift, hence should be included in mesoscale ice dynamic models. Also, wave can cause rapid thickening of pancake ice covers. This mechanical thickening may be responsible for sustainability of early ice covers. Third, pancake ice formation under wave actions is discussed. Some recent laboratory work and the resulting qualitative theory for this formation process are given.
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