Author(s): J. Tuhkuri; M. Lensu; M. A. Hopkins

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Abstract: Ridging and rafting of model ice sheets have been studied. In an ice basin, model ice sheets of uniform thickness always rafted and did not form ridges. However, in nature the thickness of level ice may not be as uniform as in the laboratory and, therefore, a non-uniform model ice field consisting of floes of thickness tl and thin ice of thickness t2 connecting these floes was used in the experiments. During a test, a strip of non-uniform model ice was compressed with a pusher plate and a ridge formed at an initial cut made across the strip. The shape of the ridges that formed in the laboratory was very similar to those seen in the northern Baltic, with typical sinusoidal arches.

DOI:

Year: 1998