Antarctica

the coldest, windiest, and driest continent on Earth; severe low temperatures vary with latitude, elevation, and distance from the ocean; East Antarctica is colder than West Antarctica because of its higher elevation; Antarctic Peninsula has the most moderate climate; higher temperatures occur in January along the coast and average slightly below freezing; summers characterized by continuous daylight, while winters bring continuous darkness; persistent high pressure over the interior brings dry, subsiding air that results in very little cloud cover

about 99% thick continental ice sheet and 1% barren rock, with average elevations between 2,000 and 4,000 m; mountain ranges up to nearly 5,000 m; ice-free coastal areas include parts of southern Victoria Land, Wilkes Land, the Antarctic Peninsula area, and parts of Ross Island on McMurdo Sound; glaciers form ice shelves along about half of the coastline, and floating ice shelves constitute 11% of the area of the continent

continent mostly south of the Antarctic Circle

17,968 km

Antarctic Region

note: see entry on Disputes - international

Australia, Chile, and Argentina claim Exclusive Economic Zone (EEZ) rights or similar over 200 nm extensions seaward from their continental claims, but like the claims themselves, these zones are not accepted by other countries; 22 of 29 Antarctic Treaty consultative parties have made no claims to Antarctic territory, although Russia and the United States have reserved the right to do so, and no country can make a new claim

katabatic (gravity-driven) winds blow coastward from the high interior; frequent blizzards form near the foot of the plateau; cyclonic storms form over the ocean and move clockwise along the coast; large icebergs may calve from ice shelf volcanism: volcanic activity on Deception Island and isolated areas of West Antarctica; other seismic activity rare and weak

the coldest, windiest, highest (on average), and driest continent; during the summer, more solar radiation reaches the surface at the South Pole than is received at the equator in an equivalent period mostly uninhabitable, 99% of the land area is covered by the Antarctic ice sheet, the largest single mass of ice on Earth; it covers an area of 14 million sq km (5.4 million sq mi) and contains 26.5 million cu km (6.4 million cu mi) of ice (almost 62% of the world's fresh water)

iron ore, chromium, copper, gold, nickel, platinum and other minerals, and coal and hydrocarbons have been found in small noncommercial quantities; mineral exploitation except for scientific research is banned by the Environmental Protocol to the Antarctic Treaty; krill, icefish, toothfish, and crab have been taken by commercial fisheries, which are managed through the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR)

slightly less than 1.5 times the size of the US

90 00 S, 0 00 E