Abstract
Sea ice around Syowa Station (69°00'S, 39°35'E) on East Ongul Island was broken and disappeared, which was caused by a heavy blizzard on March 18, 1980. This report describes in situ observations of freezing process of the sea after that incidence. The frazil ice formed frequently under cold air and windy conditions. The occurrence of frazil ice and the formation of sea ice together with the data of sea water temperature, air temperature, wind speed and cloudiness are reported. On March 19, the surface water temperature was +0.5°C and it decreased. Ice crystals suspended in water were observed on March 22 when the water temperature was -1.7°C which was near the freezing point. The sea around Syowa Station froze in April and the ice thickness increased until October.
