sea ice sheet

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• 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

• Sea ice — is largely formed from seawater that freezes. Because the oceans consist of saltwater, this occurs below the freezing point of pure water, at about 1.8 °C (28.8 °F). Sea ice may be contrasted with icebergs, which are chunks of ice shelves or… …   Wikipedia

• sea ice — Ice formed from frozen seawater in polar regions. Most sea ice occurs as pack ice, which drifts across the ocean surface; other types of sea ice include fast ice, which is attached to coasts and sometimes the seafloor or between grounded icebergs …   Universalium

• 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 …  

• 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

• Antarctic ice sheet — The Antarctic ice sheet is one of the two polar ice caps of the Earth. It covers about 98% of the Antarctic continent and is the largest single mass of ice on Earth. It covers an area of almost 14 million square km and contains 30 million cubic… …   Wikipedia

• Cordilleran Ice Sheet — The Cordilleran ice sheet was a major ice sheet that covered, during glacial periods of the Quaternary, a large area of North America. This included the following areas: Western Montana The Idaho Panhandle Northern Washington state down to about… …   Wikipedia

• 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) …   Universalium

• Patagonian Ice Sheet — The Patagonian Ice Sheet was a large elongated and narrow ice sheet that covered all of Chile south of approximately present day Puerto Montt during the Llanquihue glaciation. Some maps have the Patagonian Ice Sheet connected to the icecaps of… …   Wikipedia

• Laurentide ice sheet — The Laurentide Ice Sheet was a massive sheet of ice that covered hundreds of thousands of square miles, including most of Canada and a large portion of the northern United States, between c. 95,000 and c. 20,000 years before the present day. Its… …   Wikipedia