Author(s): F. Lindemann L. H. Smedsrud
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Abstract: Arctic sea ice is often laden with sediments. It is assumed that, for instance in leads, sediments are entrained due to the process of suspension freezing. During the INTERICE I project at the Hamburg Ship Model Basin, Germany, tank experiments were conducted concerning sediment entrainment and turbulent processes. The dissipation rate, representing turbulence strength, was about 10.7 W kg-1. Thin sections of the newly grown ice showed a complex ice stratigraphy, including granular and mixed-layer ice types. The mean sediment concentration of the ice was up to four times higher as compared to the one of the water before the experiment. During the experiments, sediment entrainment into the ice occurred at low turbulence levels. The most likely entrainment mechanism was scavenging of sediments by frazil crystals and additional filtration processes within the ice texture.
Year: 1998