Greenland Ice Sheet
- Single ice cap, Greenland.Covering about 80% of the island of Greenland, it is the largest ice mass in the Northern Hemisphere, second only to the Antarctic. It extends 1,570 mi (2,530 km) north to south, has a maximum width of 680 mi (1,094 km) near its northern margin, and an average thickness of about 5,000 ft (1,500 m). The ice sheet rises to two domes; the northern dome, reaching more than 10,000 ft (3,000 m), is its thickest and coldest point. In volume it contains 12% of the world's glacial ice. If it melted, the sea level would rise 20 ft (6 m).
* * *also called Inland Ice , Danish Indlandsissingle ice cap or glacier covering about 80 percent of the island of Greenland and the largest ice mass in the Northern Hemisphere, second only in size to the Antarctic ice mass. It extends 1,570 miles (2,530 km) north-south, has a maximum width of 680 miles (1,094 km) near its northern margin, and has an average thickness of about 5,000 feet (1,500 m). Although the Swedish explorer Baron Nordenskiöld ventured onto the ice sheet in 1870 and 1883, the first crossing was made by the Norwegian Fridtjof Nansen (Nansen, Fridtjof) and his party in 1888, traveling from Angmagssalik (formerly Ammassalik) to Godthåbs Fjord. Subsequent explorations included those by Robert Peary and Knud Rasmussen.The ice sheet occupies a saucerlike basin that has a bedrock surface near sea level under most of Greenland. The ice mass, covering an area of 708,100 square miles (1,833,900 square km), is contained by coastal mountains on the east and west. It is thicker in the centre than along its margins and rises to two domes. The northern dome, located in east-central Greenland and reaching more than 10,000 feet (3,000 m) above sea level, is the area of maximum thickness of the ice sheet and has the lowest mean annual temperature on the ice cap (−24° F [−31° C]). It is separated from the southern dome (8,200 feet [2,500 m] in elevation) by a depression with a maximum elevation of 7,900 feet (2,400 m) that runs from the Disko Bay area in the west to the Angmagssalik area in the southeast. The movement of the ice sheet is principally outward from the crest of the ice divide. The margin of the ice sheet reaches the sea in the area of Melville Bay southeast of Thule in the form of large outlet glaciers that calve off into the ocean, producing numerous icebergs.The ice cap is the largest and possibly the only relict of the Pleistocene glaciations in the Northern Hemisphere. In volume it contains 12 percent of the world's glacier ice, and, if it melted, sea level would rise 20 feet (6 m). In the 1970s and early '80s the Greenland Ice Sheet Program was organized by scientists from the United States, Denmark, and Switzerland. Deep ice cores from the Greenland Ice Sheet were obtained for comparison with deep cores from the Antarctic ice mass to gain a better understanding of the factors controlling present and past ice mass dynamics, atmospheric processes, and the response of ice sheets to climatic change and to determine whether the past changes in climate were global or regional in character.
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Greenland ice sheet — The Greenland Ice Sheet is a vast body of ice covering 1.71 million km², roughly 80% of the surface of Greenland. It is the second largest ice body in the world, after the Antarctic Ice Sheet. The ice sheet is almost 2,400 kilometers long in a… … Wikipedia
Greenland Ice Sheet Project — The Greenland Ice Sheet Project (GISP) was a decade long project to drill ice cores in Greenland that involved scientists and funding agencies from Denmark, Switzerland and the United States. Besides the U.S. National Science Foundation, funding… … Wikipedia
Greenland Ice Sheet Program — Das Greenland Ice Sheet Project (GISP) war ein Bohrprogramm zur Gewinnung von Eisbohrkernen aus dem grönländischen Eisschild, um damit paläoklimatologische Daten zu gewinnen. Es wurde von der amerikanischen National Science Foundation (NSF)… … Deutsch Wikipedia
Greenland Ice Sheet Project — Das Greenland Ice Sheet Project (GISP) war ein Bohrprogramm zur Gewinnung von Eisbohrkernen aus dem grönländischen Eisschild, um damit paläoklimatologische Daten zu gewinnen. Es wurde von der amerikanischen National Science Foundation (NSF)… … Deutsch Wikipedia
Ice sheet dynamics — describe the motion within large bodies of ice, such those currently on Greenland and Antarctica. Ice motion is dominated by the movement of glaciers, whose gravity driven activity is controlled by two main variable factors: the temperature and… … Wikipedia
Ice sheet — An ice sheet is a mass of glacier ice that covers surrounding terrain and is greater than 50,000 km² (20,000 mile²). [cite web|url=http://gemini.oscs.montana.edu/ geol445/hyperglac/glossary.htm|accessdate=2006 08 22|title=Glossary of Important… … Wikipedia
ice sheet — /ˈaɪs ʃit/ (say uys sheet) noun 1. a broad, thick sheet of ice covering an extensive area for a long period of time. 2. a mass of glacier ice that covers more than 50 000 square kilometres. Also, icesheet. The only current ice sheets (def. 2) are … Australian English dictionary
Greenland ice core project — The Greenland Ice Core Project (GRIP) was a multinational European research project, organised through the European Science Foundation. Funding came from 8 nations (Belgium, Denmark, France, Germany, Iceland, Italy, Switzerland, and United… … Wikipedia
Greenland Ice Core Project — Das Greenland Ice Core Project (abgekürzt: GRIP) war ein multinationales europäisches Projekt zur Erforschung des grönländischen Inlandseises. In den Jahren 1989 bis 1992 wurde der Eisschild in Zentralgrönland (72° 35 N, 37° 38 W) bis in eine… … Deutsch Wikipedia
ice sheet — noun : a glacial ice cover : ice cap the ice sheets on some Greenland promontories especially : one (as a continental glacier) spreading outward over a large land area and concealing all or most surface features the great ice sheets covering much … Useful english dictionary