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George VI Ice Shelf
The George VI Ice Shelf () is an extensive ice shelf that occupies George VI Sound which separates Alexander Island from Palmer Land in Antarctica. The ice shelf extends from Ronne Entrance, at the southwest end of the sound, to Niznik Island, about south of the north entrance between Cape Brown and Cape Jeremy. It was named by the UK Antarctic Place-Names Committee The UK Antarctic Place-Names Committee (or UK-APC) is a United Kingdom government committee, part of the Foreign and Commonwealth Office, responsible for recommending names of geographical locations within the British Antarctic Territory (BAT) and ... in association with George VI Sound. Further reading * J.Loynes, J.R.Potter, J.G.Paren, Current, temperature, and salinity beneath George VI Ice Shelf, Antarctica', Deep Sea Research Part A. Oceanographic Research Papers Volume 31, Issue 9, September 1984, Pages 1037-1055 * Jenkins, A., and S. Jacobs (2008), Circulation and melting beneath George VI Ice Shelf, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountains On Alexander Island (6280158413)
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited Summit (topography), summit area, and is usually higher than a hill, typically rising at least 300 metres (1,000 feet) above the surrounding land. A few mountains are Monadnock, isolated summits, but most occur in mountain ranges. Mountain formation, Mountains are formed through Tectonic plate, tectonic forces, erosion, or volcanism, which act on time scales of up to tens of millions of years. Once mountain building ceases, mountains are slowly leveled through the action of weathering, through Slump (geology), slumping and other forms of mass wasting, as well as through erosion by rivers and glaciers. High elevations on mountains produce Alpine climate, colder climates than at sea level at similar latitude. These colder climates strongly affect the Montane ecosystems, ecosys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ice Shelf
An ice shelf is a large floating platform of ice that forms where a glacier or ice sheet flows down to a coastline and onto the ocean surface. Ice shelves are only found in Antarctica, Greenland, Northern Canada, and the Russian Arctic. The boundary between the floating ice shelf and the anchor ice (resting on bedrock) that feeds it is the grounding line. The thickness of ice shelves can range from about to . In contrast, sea ice is formed on water, is much thinner (typically less than ), and forms throughout the Arctic Ocean. It is also found in the Southern Ocean around the continent of Antarctica. The movement of ice shelves is principally driven by gravity-induced pressure from the grounded ice. That flow continually moves ice from the grounding line to the seaward front of the shelf. In steady state, about half of Antarctica's ice shelf mass is lost to basal melt and half is lost to calving, but the relative importance of each process varies significantly between ice s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George VI Sound
George VI Sound or Canal Jorge VI or Canal Presidente Sarmiento or Canal Seaver or King George VI Sound or King George the Sixth Sound is a major bay/ fault depression, 300 miles (483 km) long and mainly covered by a permanent ice shelf. It is in the shape of the letter J without any upper bar. It lines the east and south shores of Alexander Island, separating it from the vestigial, quite small, Wordie Ice Shelf and Palmer Land (the south-west of the Antarctic Peninsula) and the north-facing "English Coast". A quite central point of it is . Various lakes adjoin; these receive large amounts of melt ice from the George VI Ice Shelf. These include Hodgson, Moutonee and Ablation Lakes. Several glaciers flow eastward into the sound from the east interior of Alexander Island, the vast majority of these glaciers are south of Planet Heights, where all of these glaciers are named after moons, satellites and planets of the Solar System in the same vein as the Heights, named by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexander Island
Alexander Island, which is also known as Alexander I Island, Alexander I Land, Alexander Land, Alexander I Archipelago, and Zemlja Alexandra I, is the largest island of Antarctica. It lies in the Bellingshausen Sea west of Palmer Land, Antarctic Peninsula from which it is separated by Marguerite Bay and George VI Sound. The George VI Ice Shelf entirely fills George VI Sound and connects Alexander Island to Palmer Land. The island partly surrounds Wilkins Sound, which lies to its west.Stewart, J. (2011) ''Antarctic An Encyclopedia'' McFarland & Company Inc, New York. 1776 pp. . Alexander Island is about long in a north–south direction, wide in the north, and wide in the south. Alexander Island is the second-largest uninhabited island in the world, after Devon Island. History Alexander Island was discovered on January 28, 1821, by a Russian expedition under Fabian Gottlieb von Bellingshausen, who named it Alexander I Land for the reigning Tsar Alexander I of Russia. Wha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palmer Land
Palmer Land () is the portion of the Antarctic Peninsula, Antarctica that lies south of a line joining Cape Jeremy and Cape Agassiz. This application of Palmer Land is consistent with the 1964 agreement between the Advisory Committee on Antarctic Names and the UK Antarctic Place-Names Committee, in which the name Antarctic Peninsula was approved for the major peninsula of Antarctica, and the names Graham Land and Palmer Land for the northern and southern portions, respectively. The line dividing them is roughly 69° S. Boundaries In its southern extreme, the Antarctic Peninsula stretches west, with Palmer Land eventually bordering Ellsworth Land along the 80° W line of longitude. Palmer Land is bounded in the south by the ice-covered Carlson Inlet, an arm of the Filchner-Ronne Ice Shelf, which crosses the 80° W line. This is the base of Cetus Hill. This feature is named after Nathaniel Palmer, an American sealer who explored the Antarctic Peninsula area southward of Deceptio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctica
Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest continent, being about 40% larger than Europe, and has an area of . Most of Antarctica is covered by the Antarctic ice sheet, with an average thickness of . Antarctica is, on average, the coldest, driest, and windiest of the continents, and it has the highest average elevation. It is mainly a polar desert, with annual precipitation of over along the coast and far less inland. About 70% of the world's freshwater reserves are frozen in Antarctica, which, if melted, would raise global sea levels by almost . Antarctica holds the record for the lowest measured temperature on Earth, . The coastal regions can reach temperatures over in summer. Native species of animals include mites, nematodes, penguins, seals and tardigrades. Where vegetation o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ronne Entrance
Ronne Entrance is a broad southwest entrance of the George VI Sound where it opens from the southeast portion of the Bellingshausen Sea at the southwest side of Alexander Island, Antarctica. The south side of the Monteverdi Peninsula occupies the north portion of the Ronne Entrance while Ellsworth Land occupies the southern portion of the entrance. The entrance receives much ice throughout the whole year mainly because the entrance protrudes eastward into the adjacent George VI Sound and the George VI Ice Shelf from the southwest section, the Ronne Entrance is also prone to ice flow from the Bach Ice Shelf (which separates the south side of the Beethoven Peninsula from the north side of the Monteverdi Peninsula) as well as receiving ice from the Wilkins Ice Shelf (mainly from the southernmost end of the ice shelf). There are a few islands situated within the Ronne Entrance, mainly in the southwest area. Some of these islands include the Eklund Islands, DeAtley Island, Spaatz Island, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sound (geography)
In geography, a sound is a smaller body of water typically connected to a larger sea or ocean. There is little consistency in the use of "sound" in English-language place names. It can refer to an inlet, deeper than a bight and wider than a fjord, or a narrow sea or ocean channel between two bodies of land (similar to a strait), or it can refer to the lagoon located between a barrier island and the mainland. Overview A sound is often formed by the seas flooding a river valley. This produces a long inlet where the sloping valley hillsides descend to sea-level and continue beneath the water to form a sloping sea floor. The Marlborough Sounds in New Zealand are good examples of this type of formation. Sometimes a sound is produced by a glacier carving out a valley on a coast then receding, or the sea invading a glacier valley. The glacier produces a sound that often has steep, near vertical sides that extend deep underwater. The sea floor is often flat and deeper at the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Niznik Island
Niznik Island is an island in the north part of George VI Sound, lying opposite the mouth of Eureka Glacier near the coast of Palmer Land. Discovered by the Ronne Antarctic Research Expedition (RARE), 1947–48, under Ronne, who named it for the Theodore T. Niznik family of Baltimore, MD, contributors to the expedition. Niznik Island is part of the George VI Ice Shelf The George VI Ice Shelf () is an extensive ice shelf that occupies George VI Sound which separates Alexander Island from Palmer Land in Antarctica. The ice shelf extends from Ronne Entrance, at the southwest end of the sound, to Niznik Island .... See also * List of Antarctic and sub-Antarctic islands Islands of Palmer Land {{PalmerLand-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cape Brown
Cape Brown is a prominent ice-covered cape north-northeast of the summit of Mount Nicholas (Mount Nicholas being the northern extremity of the Douglas Range), marking the eastern side of the entrance to Schokalsky Bay on the northeast coast of Alexander Island in Antarctica. It was first seen from a distance by the French Antarctic Expedition under Jean-Baptiste Charcot in 1909, but charted as part of a small island. It was photographed from the air in 1937 by the British Graham Land Expedition under John Rymill, and later roughly mapped from the photos. It was surveyed from the ground in 1948 by Colin C. Brown, Falkland Islands Dependencies Survey surveyor at Stonington Island, 1948–49, for whom the cape is named. See also * Cape Vostok * Kosar Point Further reading * Defense Mapping Agency 1992, Sailing Directions (planning Guide) and (enroute) for Antarctica', P 377 * Ute Christina Herzfeld, Atlas of Antarctica: Topographic Maps from Geostatistical Analysis of Sate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cape Jeremy
Cape Jeremy is a cape marking the east side of the north entrance to George VI Sound and the west end of a line dividing Graham Land and Palmer Land, Antarctica. It was discovered by the British Graham Land expedition, 1934–37, under John Riddoch Rymill, who named it for Jeremy Scott, son of James Maurice Scott, who served as home agent for the expedition and was formerly a member of the British Arctic Air Route Expedition. Nogal de Saldán Refuge Nogal de Saldán Refuge () is an Argentine Antarctic refuge located south east of Cape Jeremy, on the Fallières Coast. It is administered by the Argentine Army and depends on the San Martín Base, which is to the north. Gustavo Adolfo Giró Tapper, with the rank of lieutenant, served as commander of the San Martín Base during the International Geophysical Year of the 1958. Its group was composed of 20 units. In the winter, he drove a patrol with sled pulled by dogs, to Cape Jeremy installing the Refuge Nogal de Saldán in S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UK Antarctic Place-Names Committee
The UK Antarctic Place-Names Committee (or UK-APC) is a United Kingdom government committee, part of the Foreign and Commonwealth Office, responsible for recommending names of geographical locations within the British Antarctic Territory (BAT) and the South Georgia and the South Sandwich Islands (SGSSI). Such names are formally approved by the Commissioners of the BAT and SGSSI respectively, and published in the BAT Gazetteer and the SGSSI Gazetteer maintained by the Committee. The BAT names are also published in the international Composite Gazetteer of Antarctica maintained by Scientific Committee on Antarctic Research, SCAR. The Committee may also consider proposals for new place names for geographical features in areas of Antarctica outside BAT and SGSSI, which are referred to other Antarctic place-naming authorities, or decided by the Committee itself if situated in the unclaimed sector of Antarctica. Names attributed by the committee * Anvil Crag, named for descriptive featu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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