| Résumé | During the period of December 1979 to June 1980, five visits were made to observe and measure ice behaviour around the wharf at Nanisivik, on Baffin Island. The measurements included ice thickness, temperature, salinity and density, and horizontal movements of the ice cover. In March 1980, additional measurements and observations were made of tides, rotations of the ice sheet, and grain structure of the ice. A model of the formation of an active zone of ice between the wharf and the adjacent ice cover has been proposed, based on the observed evolution of ice conditions and internal structure of the active zone. Horiztonal growth of the active zone displaces the adjacent ice cover away from the wharf and in doing so, generates ice pressures, estimated at 64 kPa, on the wharf. |
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