Читать книгу The 2010 CIA World Factbook - United States. Central Intelligence Agency - Страница 127

Map references:

Arctic

Area:

total: 14.056 million sq km

note: includes Baffin Bay, Barents Sea, Beaufort Sea, Chukchi Sea, East Siberian Sea, Greenland Sea, Hudson Bay, Hudson Strait, Kara Sea, Laptev Sea, Northwest Passage, and other tributary water bodies

Area - comparative:

slightly less than 1.5 times the size of the US

Coastline:

45,389 km

Climate:

polar climate characterized by persistent cold and relatively narrow annual temperature ranges; winters characterized by continuous darkness, cold and stable weather conditions, and clear skies; summers characterized by continuous daylight, damp and foggy weather, and weak cyclones with rain or snow

Terrain:

central surface covered by a perennial drifting polar icepack that, on average, is about 3 meters thick, although pressure ridges may be three times that thickness; clockwise drift pattern in the Beaufort Gyral Stream, but nearly straight-line movement from the New Siberian Islands (Russia) to Denmark Strait (between Greenland and Iceland); the icepack is surrounded by open seas during the summer, but more than doubles in size during the winter and extends to the encircling landmasses; the ocean floor is about 50% continental shelf (highest percentage of any ocean) with the remainder a central basin interrupted by three submarine ridges (Alpha Cordillera, Nansen Cordillera, and Lomonosov Ridge)

Elevation extremes:

lowest point: Fram Basin −4,665 m

highest point: sea level 0 m

Natural resources:

sand and gravel aggregates, placer deposits, polymetallic nodules, oil and gas fields, fish, marine mammals (seals and whales)

Natural hazards:

ice islands occasionally break away from northern Ellesmere Island; icebergs calved from glaciers in western Greenland and extreme northeastern Canada; permafrost in islands; virtually ice locked from October to June; ships subject to superstructure icing from October to May

Environment - current issues:

endangered marine species include walruses and whales; fragile ecosystem slow to change and slow to recover from disruptions or damage; thinning polar icepack

Geography - note:

major chokepoint is the southern Chukchi Sea (northern access to the Pacific Ocean via the Bering Strait); strategic location between North America and Russia; shortest marine link between the extremes of eastern and western Russia; floating research stations operated by the US and Russia; maximum snow cover in March or April about 20 to 50 centimeters over the frozen ocean; snow cover lasts about 10 months

Economy ::Arctic Ocean

Economy - overview:

Economic activity is limited to the exploitation of natural resources, including petroleum, natural gas, fish, and seals.

Transportation ::Arctic Ocean

Ports and terminals:

Churchill (Canada), Murmansk (Russia), Prudhoe Bay (US)

Transportation - note:

sparse network of air, ocean, river, and land routes; the Northwest Passage (North America) and Northern Sea Route (Eurasia) are important seasonal waterways

Transnational Issues ::Arctic Ocean

Disputes - international:

the littoral states are engaged in various stages of demonstrating the limits of their continental shelves beyond 200 nautical miles from their declared baselines in accordance with Article 76, paragraph 8, of the United Nations Convention on the Law of the Sea; record summer melting of sea ice in the Arctic has restimulated interest in maritime shipping lanes and sea floor exploration

page last updated on November 17, 2010

======================================================================

@Argentina (South America)

Introduction ::Argentina

Background:

In 1816, the United Provinces of the Rio Plata declared their independence from Spain. After Bolivia, Paraguay, and Uruguay went their separate ways, the area that remained became Argentina. The country's population and culture were heavily shaped by immigrants from throughout Europe, but most particularly Italy and Spain, which provided the largest percentage of newcomers from 1860 to 1930. Up until about the mid-20th century, much of Argentina's history was dominated by periods of internal political conflict between Federalists and Unitarians and between civilian and military factions. After World War II, an era of Peronist populism and direct and indirect military interference in subsequent governments was followed by a military junta that took power in 1976. Democracy returned in 1983 after a failed bid to seize the Falkland (Malvinas) Islands by force, and has persisted despite numerous challenges, the most formidable of which was a severe economic crisis in 2001–02 that led to violent public protests and the successive resignations of several presidents.

Geography ::Argentina

Location:

Southern South America, bordering the South Atlantic Ocean, between

Chile and Uruguay

Geographic coordinates: