Antarctic Peninsula


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Antarctic Peninsula,

glaciated mountain region of W AntarcticaAntarctica
, the fifth largest continent, c.5,500,000 sq mi (14,245,000 sq km), asymmetrically centered on the South Pole and almost entirely within the Antarctic Circle. Geology and Geography

Antarctica consists of two major regions: W Antarctica (c.
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, extending c.1,200 mi (1,930 km) N toward South America; in the south, volcanic peaks rise to c.11,000 ft (3,350 m). Most of its NE coast is fringed by the Larsen ice shelf. The peninsula is surrounded by numerous islands, including the South Shetlands and the Palmer Archipelago. The tip of the peninsula, 670 mi (1,078 km) from Cape Horn, is Antarctica's farthest point from the South Pole. The continent's only flowering plants are found on the peninsula.

The northwest coast of the peninsula is believed to have been mapped by the British navigator Edward BransfieldBransfield, Edward,
1795–1852, English sea captain and antarctic explorer. In 1820, Bransfield sailed from Chile to the South Shetland Islands off the N Antarctic Peninsula.
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 in Jan., 1820, and was explored by sealers in 1820–21. First considered to be part of the continent, the peninsula was later (1928) thought to be a group of islands; the John Rymill expedition (1934–37) proved its peninsularity. It was originally named Palmer Peninsula by Americans for Nathaniel PalmerPalmer, Nathaniel Brown,
1799–1877, American sea captain and antarctic explorer, b. Stonington, Conn. While on a whaling voyage (1820–21) in the South Shetlands, he commanded the Hero
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, a U.S. captain who explored the area in Nov., 1820. In 1832, Britain claimed it and called it Graham LandGraham Land,
part of the Antarctic Peninsula, W Antarctica. This ice-covered, mountainous area was thought to be a group of islands but further exploration (1934) showed it to be peninsular. Claimed by Britain in 1832, it was also claimed by Argentina and Chile.
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 and Trinity Peninsula. Argentina claimed it in 1940 as San Martin Land and Chile in 1942 as O'Higgins Land. In 1964, by international agreement, the entire feature was called the Antarctic Peninsula; Graham Land, Trinity Peninsula, and Palmer LandPalmer Land,
part of the Antarctic Peninsula, W Antarctica. Named by Americans after Nathaniel Palmer, who explored the area in 1820, Palmer Land (or Palmer Peninsula) referred to the entire Antarctic Peninsula.
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 are used as local names.

The peninsula is now the site of numerous research stations. The disintegration of a Rhode Island–sized section of the Larsen ice shelf over a few weeks time in 2002, although directly due to locally warmer temperatures, was also regarded by some scientists as a result of the more general global warmingglobal warming,
the gradual increase of the temperature of the earth's lower atmosphere as a result of the increase in greenhouse gases since the Industrial Revolution. Global warming and its effects, such as more intense summer and winter storms, are also referred to as climate
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. It was the largest of several ice shelves on the peninsula that have retreated since the 1960s, and has since been much further reduced.

Antarctic Peninsula

the largest peninsula of Antarctica, between the Weddell Sea and the Pacific: consists of Graham Land in the north and the Palmer Peninsula in the south
References in periodicals archive ?
RESEARCH Dr Stewart Jamieson, above, and, below, Marguerite Bay, in the Antarctic Peninsula
The Larsen B shelf's collapse came at the end of the warmest summer on record in the Antarctic peninsula, where average temperatures have risen by about 2.
Rapid warming in the Antarctic Peninsula over the last 50 years, including an incredible 10-degree F rise during the Austral winter months, has led to a decline of winter sea ice, which the krill depend on for their productivity.
Temperatures along the Antarctic Peninsula average 27 degrees in January and have been as high as 59 degrees.
According to the British Antarctic Survey, surface temperatures along the West coast of the Antarctic Peninsula have already increased nearly 5 degrees Fahrenheit over the last half-century - many times the global average.
28 ( ANI ): A new research from the Antarctic Peninsula has shown that the summer melt season has been getting longer over the last 60 years.
Pupils, their parents and local residents are invited to attend the free events, in which Mr Francis will recount the experience of his trip to the Antarctic Peninsula, with renowned polar explorer Robert Swan OBE, to view the effects of climate change.
The inaugural itinerary - Explorers' Quest - is a 20-day voyage from Ushuaia, Argentina to the Antarctic Peninsula, then on to remote South Georgia and the Falkland Islands.
During the past half-century, the largest increases in temperature have occurred in high-latitude regions such as Alaska, Siberia, and the Antarctic Peninsula.
The Army expedition set off for the Antarctic Peninsula from Portsmouth last August.
Dr David Vaughan, a BAS glaciologist, said: 'In 1998, BAS predicted the demise of more ice shelves around the Antarctic peninsula.

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