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    Ant�rctico Geograf�a 2000

      Ubicaci�n: continent mostly south of the Antarctic Circle

      Cordenadas Geogr�ficas: 90 00 S, 0 00 E

      Referencias en el mapa: Antarctic Region

      Area:
      total: 14 million sq km
      land: 14 million sq km (280,000 sq km ice-free, 13.72 million sq km ice-covered) (est.)
      note: fifth-largest continent, following Asia, Africa, North America, and South America, but larger than Australia and the subcontinent of Europe

      Area - comparativo: slightly less than 1.5 times the size of the US

      Fronteras: 0 km
      note: see entry on International disputes

      Costa: 17,968 km

      Demandas Mar�timas: none, but see the Disputes - international entry

      Clima: 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

      Terreno: about 98% thick continental ice sheet and 2% barren rock, with average elevations between 2,000 and 4,000 meters; mountain ranges up to 5,140 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

      Extremos de Elevaci�n:
      lowest point: Southern Ocean 0 m
      highest point: Vinson Massif 5,140 m

      Recursos Naturales: none presently exploited; iron ore, chromium, copper, gold, nickel, platinum and other minerals, and coal and hydrocarbons have been found in small, uncommercial quantities

      Uso de Tierras:
      arable land: 0%
      permanent crops: 0%
      permanent pastures: 0%
      forests and woodland: 0%
      other: 100% (ice 98%, barren rock 2%)

      Tierras Irrigadas: 0 sq km (1993)

      Peligros Naturales: 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

      Ambiente - asuntos actuales: 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 coming 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

      Nota - geograf�a: 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

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    Revisto 01-Nov-00
    Copyright © 2000 Photius Coutsoukis (all rights reserved)


    ctr10/10/00