Analysis of Tidal Deformations of Land Fast Ice in Shallow Arctic Fjord

摘要

The paper is devoted to the investigation of ice deformations and ice stresses build up in shore line zone of Sveasundet in Svea Bay of the Van Mijen Fjord in Spitsbergen. Two field surveys were performed in 2011 and 2012 for the monitoring of ice deformations induced by semidiurnal tides. A Leica Total Station and Laser Scanner Riegl VZ-1000 were used in the field measurements. Significant deflections of the ice surface from the horizontal plane were detected at low tide phases. Measurements of ice stresses near the shoreline indicated their semidiurnal oscillations with maximal onshore stresses at high tide. Mathematical model and numerical simulations were performed to explain the buildup and concentration of the ice stresses near narrow tips of the shoreline.