A sea ice dynamics model for the Gulf of Riga

摘要

A model for simulating and forecasting the drift of sea ice in the Gulf of Riga, Baltic Sea, is presented. The basin size and ice thickness scale to 100 km and 30 cm, respectively. The model is based on the conservation and momentum laws of ice with a three -level ice state and viscous-plastic rheology. The steady-state momentum equation is employed; the ice state levels are open water, unreformed, ice, and deformed (ridged) ice, together with a dynamic constraint controlling the redistribution process. The model parameters have been estimated by comparing the model outcome with the database of ice charts. Ridging was allowed for ice thicker than 10 cm and thinner ice rafting in compression.