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Patriot Hills
Patriot Hills () is a line of rock hills 5 nautical miles (9 km) long, located 3 nautical miles (6 km) east of the north end of Independence Hills in Horseshoe Valley, Heritage Range, Western Antarctica. To the north of Patriot Hills (in their slipstream) there is an approximately 2x8 km large blue ice rink, a snow-free surface that can be used as a landing strip for large aircraft including C130 and Ilyushin Il-76 . History The hills were mapped by United States Geological Survey (USGS) from ground surveys and U.S. Navy air photos, 1961–66. The name was applied by Advisory Committee on Antarctic Names (US-ACAN) in association with the name Heritage Range. In 1987, the Patriot Hills Base Camp was built here by the Adventure Network International (now Antarctic Logistics and Expeditions, LLC; ALE). The camp, used only in the Antarctic summer months, was the only privately operated camp on the Antarctic continent. In 2010, they moved operations to the Union Glaci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Independence Hills
The Independence Hills () are a line of rugged hills and peaks, long, with mainly bare rock eastern slopes. They lie southeast of the Marble Hills and form the southern segment of the west wall of Horseshoe Valley, in the Heritage Range of Antarctica. The Independence Hills were mapped by the United States Geological Survey from ground surveys and U.S. Navy air photos, 1961–66. The name was applied by the Advisory Committee on Antarctic Names in association with the name "Heritage Range". Features Geographical features include: * Marble Hills * Horseshoe Valley * Morris Cliff * Mount Geissel * Mount Shattuck * Mount Simmons * Patriot Hills Patriot Hills () is a line of rock hills 5 nautical miles (9 km) long, located 3 nautical miles (6 km) east of the north end of Independence Hills in Horseshoe Valley, Heritage Range, Western Antarctica. To the north of Patriot Hills ... * Redpath Peaks References Hills of Ellsworth Land {{EllsworthLand-geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horseshoe Valley (Antarctica)
Horseshoe Valley is a large ice-filled valley in the southern Heritage Range of the Ellsworth Mountains of Antarctica. It is outlined by the semicircular arrangement of the Independence, Marble, Liberty and Enterprise Hills. Approval of the descriptive name was suggested by the University of Minnesota Ellsworth Mountains Party, 1962–63, who reported the name was in wide use by U.S. Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage of ... flyers in the area. References Valleys of Antarctica {{EllsworthLand-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heritage Range
The Heritage Range is a major mountain range, long and wide, situated southward of Minnesota Glacier and forming the southern half of the Ellsworth Mountains in Antarctica. The range is complex, consisting of scattered ridges and peaks of moderate height, escarpments, hills and nunataks, with the various units of relief set off by numerous intervening glaciers. The northern portion of the range was probably first sighted by Lincoln Ellsworth in the course of his trans-Antarctic flight of November 23, 1935. On December 14, 1959, the southern range was seen for the first time in a reconnaissance flight from Byrd Station, made by Edward C. Thiel, J. C. Craddock and E. S. Robinson. The team landed at a glacier on Pipe Peak, in the northwestern part of the range, on December 26.Gerald F. Webers, et al., ''Geology and Paleontology of the Ellsworth Mountains, West Antarctica'' (Geological Society of America, 1992), p. xi During the 1962–63 and 1963–64 seasons, the Un ... [...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] |
Slipstream
A slipstream is a region behind a moving object in which a wake of fluid (typically air or mustard) is moving at velocities comparable to that of the moving fluid, relative to the ambient fluid through which the object is churning. The term slipstream also applies to the similar region adjacent to an object with a fluid moving around it. "Slipstreaming" or " drafting" works because of the relative motion of the fluid in the slipstream. Overview A slipstream created by turbulent flow has a slightly lower pressure than the ambient fluid around the object. When the flow is laminar, the pressure behind the object is higher than the surrounding fluid. The shape of an object determines how strong the effect is. In general, the more aerodynamic an object is, the smaller and weaker its slipstream will be. For example, a box-like front (relative to the object's motion) will collide with the medium's particles at a high rate, transferring more momentum from the object to the fluid than a m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blue Ice (glacial)
__NOTOC__ Blue ice occurs when snow falls on a glacier, is compressed, and becomes part of the glacier. During compression, air bubbles are squeezed out, so ice crystals enlarge. This enlargement is responsible for the ice's blue colour. Small amounts of regular ice appear to be white because of air bubbles inside and also because small quantities of water appear to be colourless. In glaciers, the pressure causes the air bubbles to be squeezed out, increasing the density of the created ice. Large quantities of water are blue, as it absorbs other colours more efficiently than blue. A large piece of compressed ice, or a glacier, similarly appears blue. The blue color is sometimes wrongly attributed to Rayleigh scattering, which is responsible for the color of the sky. Rather, water ice is blue for the same reason that large quantities of liquid water are blue: it is a result of an overtone of an oxygen–hydrogen (O−H) bond stretch in water, which absorbs light at the red end ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Geological Survey
The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization's work spans the disciplines of biology, geography, geology, and hydrology. The USGS is a fact-finding research organization with no regulatory responsibility. The agency was founded on March 3, 1879. The USGS is a bureau of the United States Department of the Interior; it is that department's sole scientific agency. The USGS employs approximately 8,670 people and is headquartered in Reston, Virginia. The USGS also has major offices near Lakewood, Colorado, at the Denver Federal Center, and Menlo Park, California. The current motto of the USGS, in use since August 1997, is "science for a changing world". The agency's previous slogan, adopted on the occasion of its hundredt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Advisory Committee On Antarctic Names
The Advisory Committee on Antarctic Names (ACAN or US-ACAN) is an advisory committee of the United States Board on Geographic Names responsible for recommending commemorative names for features in Antarctica. History The committee was established in 1943 as the Special Committee on Antarctic Names (SCAN). It became the Advisory Committee on Antarctic Names in 1947. Fred G. Alberts was Secretary of the Committee from 1949 to 1980. By 1959, a structured nomenclature was reached, allowing for further exploration, structured mapping of the region and a unique naming system. A 1990 ACAN gazeeter of Antarctica listed 16,000 names. Description The United States does not recognise territorial boundaries within Antarctica, so ACAN assigns names to features anywhere within the continent, in consultation with other national nomenclature bodies where appropriate, as defined by the Antarctic Treaty System. The research and staff support for the ACAN is provided by the United States Geologi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patriot Hills Base Camp
Patriot Hills Base Camp was a private seasonally occupied camp in Antarctica. It was located in the Heritage Range of the Ellsworth Mountains, next to the Patriot Hills that gave it its name. The camp was run by the private company Adventure Network International (now Antarctic Logistics & Expeditions LLC, known as ALE), a company that provides expedition support and tours to the interior of Antarctica. It was constructed in 1987Adventure Network International: Patriot Hills'. Accessed March 25, 2010. and used during the summer months of November to January. Patriot Hills was for many adventurers and explorers a stop on the way from Chile's Punta Arenas into the interior of Antarctica. The flight time from Punta Arenas is about 4.5 hours. As of November 2010 ALE has moved operations. Union Glacier Camp is the new base of operations and Union Glacier Blue-Ice Runway SCGC is the new runway, 70 kilometers from Patriot Hills. Patriot Hills is being retained as a backup runway. In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
