Author(s): Keguang Wang; Matti Lepparanta; Tarmo Kouts
Linked Author(s): Matti Leppäranta
Keywords: No Keywords
Abstract: In winters 2002 and 2003, two drastic sea ice dynamic events took place in Parnu Bay, a basin of 15 km across in the Gulf of Riga, Baltic Sea. The ice in the former event was driven into motion by the wind, about half of the basin opened and in the other side heavy rubble formation occurred. The thickness of the fast ice was 20 – 40 cm and pack ice about 5 – 15 cm, and the wind speed was about 20 m/s, unusual combination necessary for the event. As a consequence, the shipping conditions became very difficult for the Parnu harbour. The ice in the latter event was driven about 45 km southwestward in three days. The ice thickness in this event was about 30 cm, and wind speed ranged 5 and 12 m/s. A fine resolution ice model with parameters similar as in the Baltic Sea modelling in general reproduced the events.
Year: 2004