polynya การใช้

• Polynya is an area of open water surrounded by sea ice.
• There is also a large, permanent polynya near Sireniki.
• Though polynyas form in the area, the island is commonly ice locked.
• This polynya lasted for several weeks before disappearing on August 16, 1980.
• It is most widespread throughout the polynyas and pack ice of the Bering Sea.
• The southern winter winds shift this ice northwards, making polynyas near the sea centre.
• The surface wind creates the polynyas which opens up the water surface to more wind.
• The first ice that forms in a polynya are loose ice crystals called frazil ice.
• Freed from the ice cover, wildlife can prosper in these " polynyas ."
• The expedition investigated the ice, biology, oceanography, and biogeochemistry of the Amundsen Sea Polynya.
• They have various names, such as the Great Siberian Polynya, and can stretch over many hundreds kilometers.
• Antarctic bottom water is formed in the Cape Darnley from surface water cooling in polynyas and below the ice shelf.
• In early May, Kolchak and Strizhev surveyed Belkovsky Island and run into polynyas in the northern and western directions.
• During the winter, ivory gulls live near polynyas, or a large area of open water surrounded by sea ice.
• Located in the Weddell Sea, each year the polynya vanished with the summer melt, but returned the following year.
• The Weddell Sea Polynya has not been observed since the event witnessed by the Nimbus satellites in the mid-70s.
• Ice is drifting north to this coastal band, and several polynyas are formed by the warm south winds around there.
• A polynya forms in Cardigan Strait most winters, used by wintering Bearded and Ringed seals, polar bears, and walrus.
• The Aurora was just reaching the polynya when the fire, whose cause was not yet known, broke out, Moncur said.
• Matisen returned on 17 April 1902, reporting that 7 miles away from Kotelny Island he ran into a polynya and turned back.