Author(s): David Wrangborg; Aleksey Marchenko
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Abstract: The stress state in the coastal sea ice nearby a breakwater in Sveasundet in Svea Bay of Van Mijenfjorden on Svalbard was monitored between March and May 2013. Three pressure cells were installed in a rosette configuration on the sea side of the last tidal crack. The resulting data were analyzed both for shorter (day) and longer time scale (months) against environmental parameters such as temperature and wind data, the semidiurnal tide and ice movements. For the semidiurnal tide both adjusted Longyearbyen tidal table values and shorter periods of water pressure measurement were used. Laser scanning was used to follow the ice movements during the tidal cycle. The strongest influence on stresses was determined to be the semidiurnal tide and the ice movements it creates. The highest stress measured was 200kPa and directed almost parallel to the shoreline and last tidal crack. Highest stresses were in general found at low tide.
Year: 2014