Abstract
Sea ice has been monitored as its fluctuations are important for climatological studies in the polar regions and also in the Sea of Okhotsk. This study investigates distributions of thin sea ice area in the Sea of Okhotsk. Advection of ice floe from the coastal zone and appearance of thin ice area recur due to out-burst of cold air from Siberia. Successive data of thin ice area was obtained using passive microwave data. Fluctuations of sea ice thickness provide a new data for growth and decay of coastal polynya and productions of frazil ice which affects heat flux and salt rejection. These sea ice processes are fundamental for extent of ice covered area especially in the area of large productivity of sea ice.
