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In the polar ocean, the existence value, such as a production activity and activity of a physical distribution, has increased very much. It is related with sea ice which exists in such ocean. As a previous study about sea ice and mutual interference of wave motion, there are studies about ice plate. Appearing by a growth process of sea ice, in grease ice that is thin slurry of frazil ice at the ocean surface, there are many fundamental studies. The present paper, we firstly ran two laboratory studies about sea ice and mutual interface of wave motion which use two models ice. One experiment is wave decay and the other one is wave propagation at thin grease ice layer in finite depth. Secondary, we introduce physical stress, a boundary layer thought about into viscous two-layer model, lead a dispersion relation and examine comparison with an experiment. As a result, we obtained results that differ from previous study which dispersion relation.

STUDY ON WAVE MODIFICATION BY INTERACTION BETWEEN GREASE ICE AND WAVE MOTION