The King Baudouin Ice Shelf (also called Roi Baudouin Ice shelf, from French: Plateforme de glace Roi Baudouin [1] ) in Dronning Maud Land, East Antarctica, is within the Norwegian part of Antarctica. It is named after King Baudouin of Belgium (1930-1993).
The King Baudouin ice shelf is confined by two ice rises (including Derwael Ice Rise) and one under-ice pinning-point with a width of only a few kilometres; the latter seems to define the seaward edge of the ice shelf and impacts ice flow in the hinterland. [2] [3]
Belgium was one of the original 12 signatories of the Antarctic Treaty. It established its Roi Baudoin Base scientific research station on the ice shelf in 1958, built for the International Geophysical Year (IGY), and decommissioned in 1967. [4] This operated over several three year cycles: 1958–1961 and 1964–1966.
The ice shelf is being actively studied by Belgian Antarctic Program scientists from the Princess Elisabeth Base. This includes:
In early 2015, scientists announced the discovery of an almost circular structure in the ice surface, about 2 kilometres (1.2 mi) wide. First hypothesis for its origin, among other ice-shelf processes, [6] was the impact of a meteor. [7] The feature was discovered by German scientist Christian Müller as he conducted an aerial survey on 20 December 2014. [8] If found, this is likely to be the largest identified Antarctic meteorite, as the rule of thumb is that the meteorite causing a crater is about 5-10% [9] of the diameter of the crater, or roughly 200m in this case. Initial analysis of satellite images indicates that the feature could have been present before the supposed impact, [10] even for 25 years. [8] [9] In December 2016, researchers concluded that the structure is a collapsed underground lake. [11]
A meteorite is a solid piece of debris from an object, such as a comet, asteroid, or meteoroid, that originates in outer space and survives its passage through the atmosphere to reach the surface of a planet or moon. When the original object enters the atmosphere, various factors such as friction, pressure, and chemical interactions with the atmospheric gases cause it to heat up and radiate energy. It then becomes a meteor and forms a fireball, also known as a shooting star; astronomers call the brightest examples "bolides". Once it settles on the larger body's surface, the meteor becomes a meteorite. Meteorites vary greatly in size. For geologists, a bolide is a meteorite large enough to create an impact crater.
The climate of Antarctica is the coldest on Earth. The continent is also extremely dry, averaging 166 mm (6.5 in) of precipitation per year. Snow rarely melts on most parts of the continent, and, after being compressed, becomes the glacier ice that makes up the ice sheet. Weather fronts rarely penetrate far into the continent, because of the katabatic winds. Most of Antarctica has an ice-cap climate with very cold, generally extremely dry weather.
The Ross Ice Shelf is the largest ice shelf of Antarctica. It is several hundred metres thick. The nearly vertical ice front to the open sea is more than 600 kilometres (370 mi) long, and between 15 and 50 metres high above the water surface. Ninety percent of the floating ice, however, is below the water surface.
Halley Research Station is a research facility in Antarctica on the Brunt Ice Shelf operated by the British Antarctic Survey (BAS). The base was established in 1956 to study the Earth's atmosphere. Measurements from Halley led to the discovery of the ozone hole in 1985. The current base is the sixth in a line of structures and includes design elements intended to overcome the challenge of building on a floating ice shelf without being buried and crushed by snow. As of 2020, the base has been left unstaffed through winter since 2017, due to concerns over the propagation of an ice crack and how this might cut off the evacuation route in an emergency. The Halley Bay Important Bird Area with its emperor penguin colony lies in the general vicinity of the base.
The Western Antarctic Ice Sheet (WAIS) is the segment of the continental ice sheet that covers West Antarctica, the portion of Antarctica on the side of the Transantarctic Mountains that lies in the Western Hemisphere. The WAIS is classified as a marine-based ice sheet, meaning that its bed lies well below sea level and its edges flow into floating ice shelves. The WAIS is bounded by the Ross Ice Shelf, the Ronne Ice Shelf, and outlet glaciers that drain into the Amundsen Sea.
The Larsen Ice Shelf is a long ice shelf in the northwest part of the Weddell Sea, extending along the east coast of the Antarctic Peninsula from Cape Longing to Smith Peninsula. It is named after Captain Carl Anton Larsen, the master of the Norwegian whaling vessel Jason, who sailed along the ice front as far as 68°10' South during December 1893. In finer detail, the Larsen Ice Shelf is a series of shelves that occupy distinct embayments along the coast. From north to south, the segments are called Larsen A, Larsen B, and Larsen C by researchers who work in the area. Further south, Larsen D and the much smaller Larsen E, F and G are also named.
Queen Fabiola Mountains is a group of mountains in Antarctica, 50 kilometres long, consisting mainly of seven small massifs which trend north–south, forming a partial barrier to the flow of inland ice. The mountains stand in isolation about 140 km (90 mi) southwest of the head of Lutzow-Holm Bay. The mountains were discovered and photographed from aircraft by the Belgian Antarctic Expedition under Guido Derom on 8 October 1960. With permission from King Baudouin of Belgium, the mountains were named after his newly wedded wife Fabiola. In November–December 1960, the mountains were visited by a party of the Japanese Antarctic Research Expedition (JARE), 1957–1962, which made geomorphological and geological surveys. They applied the name Yamato Mountains. The highest massif is Mount Fukushima.
The Amery Ice Shelf is a broad ice shelf in Antarctica at the head of Prydz Bay between the Lars Christensen Coast and Ingrid Christensen Coast. It is part of Mac. Robertson Land. The name "Cape Amery" was applied to a coastal angle mapped on 11 February 1931 by the British Australian New Zealand Antarctic Research Expedition (BANZARE) under Douglas Mawson. He named it for William Bankes Amery, a civil servant who represented the United Kingdom government in Australia (1925–28). The Advisory Committee on Antarctic Names interpreted this feature to be a portion of an ice shelf and, in 1947, applied the name Amery to the whole shelf.
Thwaites Glacier, also known as the Doomsday Glacier, is an unusually broad and vast Antarctic glacier flowing into Pine Island Bay, part of the Amundsen Sea, east of Mount Murphy, on the Walgreen Coast of Marie Byrd Land. Its surface speeds exceed 2 kilometres per year near its grounding line. Its fastest flowing grounded ice is centered between 50 and 100 kilometres east of Mount Murphy. In 1967, the Advisory Committee on Antarctic Names named the glacier after Fredrik T. Thwaites (1883–1961), a glacial geologist, geomorphologist and professor emeritus at the University of Wisconsin–Madison. The historian Reuben Gold Thwaites was his father.
An ice rise is a clearly defined elevation of the otherwise very much flatter ice shelf, typically dome-shaped and rising several hundreds of metres above the surrounding ice shelf . An ice rise forms where the ice shelf touches the seabed due to a locally increased elevation of the seabed, which however remains below sea level.. The ice shelf flows over the seabed elevation, completely covering it with ice, thereby forming an ice rise. The resulting stress increases cause crevasse formation around the ice rise.
The Schirmacher Oasis is a 25 km (16 mi) long and up to 3 km (1.9 mi) wide ice-free plateau with more than 100 freshwater lakes. It is situated in the Schirmacher Hills on the Princess Astrid Coast in Queen Maud Land in East Antarctica and is, on average, 100 m (330 ft) above sea level. With an area of 34 km2 (13 sq mi), the Schirmacher Oasis ranks among the smallest Antarctic oases and is a typical polar desert.
Antarctica is Earth's southernmost 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 nearly twice the size of Australia and larger than Europe, and has an area of 14,200,000 km2 (5,500,000 sq mi). Most of Antarctica is covered by ice, with an average thickness of 1.9 km (1.2 mi).
Neumayer-Station III, also known as Neumayer III after geophysicist Georg von Neumayer, is a German Antarctic research station of the Alfred-Wegener-Institut. It is located on the approximately 200 metres (660 ft) thick Ekström Ice Shelf several kilometres south of Neumayer-Station II. The station's assembly kit was transported to its current position early in November 2007. It is moving with the shelf ice at about 200 meters (660 ft) per year towards the open sea.
Queen Maud Land is a roughly 2.7-million-square-kilometre (1.0-million-square-mile) region of Antarctica claimed by Norway as a dependent territory. It borders the claimed British Antarctic Territory 20° west and the Australian Antarctic Territory 45° east. In addition, a small unclaimed area from 1939 was annexed on 12 June 2015. Positioned in East Antarctica, it makes out about one-fifth of the continent, and is named after the Norwegian queen Maud of Wales (1869–1938).
Crane Glacier, is a narrow glacier which flows 30 miles (50 km) in an east-northeasterly direction along the northwest side of Aristotle Mountains to enter Spillane Fjord south of Devetaki Peak, on the east coast of the Antarctic Peninsula. Sir Hubert Wilkins photographed this feature from the air in 1928 and gave it the name "Crane Channel", after C.K. Crane of Los Angeles, reporting that it appeared to be a channel cutting in an east-west direction across the peninsula. The name was altered to "Crane Inlet" following explorations along the west coast of the peninsula in 1936 by the British Graham Land Expedition, which proved that no through channel from the east coast existed as indicated by Wilkins. Comparison of Wilkins' photograph of this feature with those taken in 1947 by the Falklands Islands Dependencies Survey shows that Wilkins' "Crane Channel" is this glacier, although it lies about 75 miles (120 km) northeast of the position originally reported by Wilkins.
Derwael Ice Rise is 40 km long, 35 km wide and about 400 m tall ice rise in ice shelf off Princess Ragnhild Coast, Antarctica. Situated 70 km east of Breid Bay in northern part of Roi Baudouin Ice Shelf, directly in front of Western Ragnhild Glacier. Named for geodesist of Belgian Antarctic expedition Jean-Jacques Derwael.
The Riiser-Larsen Sea is one of the marginal seas located in the Southern Ocean off East Antarctica and south of the Indian Ocean. It is delimited Astrid Ridge in the west and the Gunnerus Ridge and the Kainanmaru Bank in the east. It is bordered by the Lazarev Sea to the west and the Cosmonauts Sea to the east, or between 14°E and 30°E. Its northern border is defined to be the 65th parallel south. The name, proposed by the Soviet Union, was never officially approved by the International Hydrographic Organization (IHO).
Belgium was one of the 12 countries that initially negotiated and signed the Antarctic Treaty.
Research stations in Queen Maud Land are connected by the Dronning Maud Land Air Network Project (DROMLAN), which is a cooperative agreement for transportation between eleven nations with research stations in East Antarctica. Long-range aircraft fly between Cape Town, South Africa and either the Troll Airfield, located at the Troll research station, or the runway at the Novolazarevskaya Station. From these two main airfields, smaller aircraft may fly further to other Antarctic destinations.
The following is a list of events that occurred in Antarctica in 2015.