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Ice blisters, typically 0.2–0.8 m high and 5–20 m long, develop annually on perennially frozen lakes in Northern Victoria Land. They are believed to be caused by hydrostatic pressures generated through progressive freezing of solute-rich water beneath the lake-ice cover during winter. Lake-ice blisters in the study area differfrom icing blisters described from the northern hemisphere. The latter are caused by hydraulic pressures and are found at locations such as river beds or spring sites on sloping terrain. The Antarctic lake-ice blisters reflect the occurrence of dry-based perennially frozen lakes with high salt contents in an extremely cold and arid environment.
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Keywords: ice-covered lakes; icing blister; lake-ice blister; permafrost; seasonal frost mound

Document Type: Research Article

Affiliations: 1: DBSF, Insubria University, Via J.H. Dunant, Varese, Italy 2: Department of Geography, University of Ottawa, Ontario Canada 3: Departments of Geography and Earth Sciences, University of Ottawa, Canada 4: Dip. Scienze della Terra, Milan Universiy, Milan, Italy

Publication date: 2009-06-01

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