Antarctica: Geography#
| Location | continent mostly south of the Antarctic Circle |
|---|---|
| Geographic Coordinates | 90 00 S, 0 00 E -90.0,0.0 |
| Land boundaries | 0 km note: see entry on Disputes - international |
| Coastline | 17,968 km |
| Elevation Extremes | lowest point: Bentley Subglacial Trench -2,540 m highest point: Vinson Massif 4,897 m note: the lowest known land point in Antarctica is hidden in the Bentley Subglacial Trench; at its surface is the deepest ice yet discovered and the world's lowest elevation not under seawater |
| Highest Mountains | |
| Terrain | about 98% thick continental ice sheet and 2% barren rock, with average elevations between 2,000 and 4,000 meters; mountain ranges up to nearly 5,000 meters; 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 |
| Natural Hazards | 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; volcanism on Deception Island and isolated areas of West Antarctica; other seismic activity rare and weak; large icebergs may calve from ice shelf |
| Natural Resource | iron ore, chromium, copper, gold, nickel, platinum and other minerals, and coal and hydrocarbons have been found in small noncommercial quantities; none presently exploited; krill, finfish, and crab have been taken by commercial fisheries |
| Land Use | arable land: 0% permanent crops: 0% other: 100% (ice 98%, barren rock 2%) (2011) |
| Climate | 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 |
| Irrigated Land | NA |
| Renewable Water Resources | NA |
| Environment_CurrentIssues | in 1998, NASA satellite data showed that the Antarctic ozone hole was the largest on record, covering 27 million square kilometers; researchers in 1997 found that increased ultraviolet light passing through the hole damages the DNA of icefish, an Antarctic fish lacking hemoglobin; ozone depletion earlier was shown to harm one-celled Antarctic marine plants; in 2002, significant areas of ice shelves disintegrated in response to regional warming |
| Environment - international agreements | NA |
| Large Cities | |
| Geography-note | the coldest, windiest, highest (on average), and driest continent; during summer, more solar radiation reaches the surface at the South Pole than is received at the Equator in an equivalent period; mostly uninhabitable, 98% of land area is ice covered |