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Akuliarusiarsuup Kuua
Akuliarusiarsuup Kuua ( da, Sandflugtdalen) is a river and valley of the same name in the Qeqqata municipality in central-western Greenland. Its source is the meltwater outflow from Russell Glacier, an outflow of the Greenland ice sheet. The river is a tributary of Qinnguata Kuussua, the main river in the Kangerlussuaq area. For most of its run, the river flows very slowly through the sandur basin of the valley, forming meanders amongst large fields of glacial silt quicksand. The climate is polar continental, with the area receiving very little rainfall. Geography Several meltwater outflow streams from the base of the Russell Glacier () form the Akuliarusiarsuup Kuua river. The valley is long, oriented east-north-east to west-south-west. From the north it is bounded by a low-lying (300-400m) ridge − part of the Kangaamiut dike swarm − separating it from large glacial lakes of Aajuitsup Tasia and Sanningasoq. On the southern side the boundary is formed by an exposed, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Riffle
A riffle is a shallow landform in a flowing channel. Colloquially, it is a shallow place in a river where water flows quickly past rocks. However, in geology a riffle has specific characteristics. Topographic, sedimentary and hydraulic indicators Riffles are almost always found to have a very low discharge compared to the flow that fills the channel (approximately 10–20%), and as a result the water moving over a riffle appears shallow and fast, with a wavy, disturbed water surface. The water's surface over a riffle at low flow also has a much steeper slope than that over other in-channel landforms. Channel sections with a mean water surface slope of roughly 0.1 to 0.5% exhibit riffles, though they can occur in steeper or gentler sloping channels with coarser or finer bed materials, respectively. Except in the period after a flood (when fresh material is deposited on a riffle), the sediment on the riverbed in a riffle is usually much coarser than on that in any other in-chann ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bluie West Eight
Sondrestrom Air Base, originally Bluie West-8, was a United States Air Force base in central Greenland. The site is located north of the Arctic Circle and from the northeast end of Kangerlussuaq Fjord (formerly known by its Danish name ''Søndre Strømfjord''). The base is approximately west-northwest of Ravneklippen and east of Sisimiut. Following World War II, the base was briefly returned to Danish control between 9 October 1950 and 20 July 1951. The 1951 Greenland bases treaty led to the return of Sondrestrom to American control. The base was turned over to the Greenland government in 1992 and is now the civilian community of Kangerlussuaq and Kangerlussuaq Airport, although the USAF operates a small Air National Guard detachment in the former base. History Names * Established on 20 October 1941 and named Bluie West Eight (BW-8); codenamed "Bodkin" in communications. : Renamed: Sondrestromfjord Army Air Base, 1945 : Renamed: Sondrestromfjord Air Base, 25 October 1947 : ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kangerlussuaq Fjord
Kangerlussuaq Fjord (old spelling: ''Kangerdlugssuaq'', da, Søndre Strømfjord) is a long fjord in the Qeqqata municipality in central-western Greenland. The fjord is long and between and wide, flowing from the estuary of Qinnguata Kuussua river to the southwest, and emptying into the Davis Strait. It is the longest fjord of western Greenland. Geography The head of the fjord is located at , at the estuary of the Qinnguata Kuussua river flowing from the Russell Glacier of the Greenland ice sheet ( kl, Sermersuaq). The fjord mouth is located at , south of the Simiutaq Island. Another, smaller waterway connects to the sea to the north of the island.Maniitsoq, Saga Map, Tage Schjøtt, 1992 Kangerlussuaq Fjord does not have any tributary fjords, with a fairly uniform coastline. Small hills of the Kangaamiut dike swarm, such as the highlands of Tarajornitsut, dominate the coast of the inner parts of the fjord, transforming into steep mountain ranges towards the mouth. In that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kangerlussuaq
Kangerlussuaq (; ; da, Søndre Strømfjord), is a settlement in western Greenland in the Qeqqata municipality located at the head of the fjord of the same name. It is Greenland's main air transport hub and the site of Greenland's largest commercial airport. The airport dates from American settlement during and after World War II, when the site was known as Bluie West-8 and then Sondrestrom Air Base. The Kangerlussuaq area is also home to Greenland's most diverse terrestrial fauna, including muskoxen, caribou, and gyrfalcons. The settlement's economy and population of 508 is almost entirely reliant on the airport and tourist industry. Geography Kangerlussuaq occupies an alluvial flatland on the far end of the 190 km long Kangerlussuaq Fjord, straddling both sides of the Qinnguata Kuussua river estuary. East of Kangerlussuaq there is a confluence of the two major regional rivers, the Qinnguata Kuussua and Akuliarusiarsuup Kuua. The valley of the latter forms large quicksa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ridge
A ridge or a mountain ridge is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for an extended distance. The sides of the ridge slope away from the narrow top on either side. The lines along the crest formed by the highest points, with the terrain dropping down on either side, are called the ridgelines. Ridges are usually termed hills or mountains as well, depending on size. Smaller ridges, especially those leaving a larger ridge, are often referred to as spurs. Types There are several main types of ridges: ;Dendritic ridge: In typical dissected plateau terrain, the stream drainage valleys will leave intervening ridges. These are by far the most common ridges. These ridges usually represent slightly more erosion resistant rock, but not always – they often remain because there were more joints where the valleys formed or other chance occurrences. This type of ridge is generally somewhat random in orientation, often ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sanningasoq
Sanningasoq (old spelling: ''Sáningassoq'') is a large oligotrophic twin lake in central-western , in the |
Aajuitsup Tasia
Aajuitsup Tasia (old spelling: ''Aujuitsup Tasia'') is a large lake in central-western Greenland, in the Qeqqata municipality. It is located approximately northeast of Kangerlussuaq. It is of elongated oval shape, with its western shore at and its eastern shore at . Aajuitsup Tasia is an oligotrophic lake of depth, covering an area of 1,350ha. Geography The 2x10 km lake is separated from the Akuliarusiarsuup Kuua valley and Kangerlussuaq in the south by a low tundra ridge − part of the Kangaamiut dike swarm. To the west lies a sibling Sanningasoq twin lake. To the north-east lies the wide highland of Isunngua. The surface of Aajuitsup Tasia is almost level with the surface of the neighboring meltwater lake, an outflow of Russell Glacier. The altitude differential produces an outflowing boggy stream flowing from Aajuitsup Tasia to the unnamed meltwater lake, allowing Aajuitsup Tasia to retain its freshwater character despite being directly in the glacier outflow path. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kangaamiut Dike Swarm
The Kangaamiut dike swarm (old spelling: ''Kangâmiut'') is a 2.04 billion year old dike swarm located in the Qeqqata region of western Greenland. The dikes cut Archean orthogneisses and are exposed along approximately of the coast and a similar distance up to the inland ice to the east, covering an area of about . To the north it is bounded by the paleoproterozoic Ikertooq shear zone (old spelling: ''Ikertôq'') while to the south the boundary is gradational with a gradual reduction in the density of dikes. The dike swarm was intruded during a phase of extensional tectonics. They were later deformed during the Nagssugtoqidian orogeny The Nagssugtoqidian orogeny was a late Paleoproterozoic mountain-building event that affected Greenland during the period 1.91 to 1.77 Ga. The orogenic belt formed during this event marks the northern boundary of the mainly Archaean North Atlan ..., with the amount of strain increasing towards the Iqertooq shear zone. References {{coord m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meltwater
Meltwater is water released by the melting of snow or ice, including glacial ice, tabular icebergs and ice shelves over oceans. Meltwater is often found in the ablation zone of glaciers, where the rate of snow cover is reducing. Meltwater can be produced during volcanic eruptions Several types of volcanic eruptions—during which lava, tephra (ash, lapilli, volcanic bombs and volcanic blocks), and assorted gases are expelled from a volcanic vent or fissure—have been distinguished by volcanologists. These are often ..., in a similar way in which the more dangerous lahars form. When meltwater pools on the surface rather than flowing, it forms melt ponds. As the weather gets colder meltwater will often re-freeze. Meltwater can collect or melt under the ice's surface. These pools of water, known as subglacial lakes can form due to geothermal heat and friction. Water source Meltwater provides drinking water for a large proportion of the world's population, as well as pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polar Climate
The polar climate regions are characterized by a lack of warm summers but with varying winters. Every month in a polar climate has an average temperature of less than . Regions with polar climate cover more than 20% of the Earth's area. Most of these regions are far from the equator and near the poles, and in this case, winter days are extremely short and summer days are extremely long (could last for the entirety of each season or longer). A polar climate consists of cool summers and very cold winters, which results in treeless tundra, glaciers, or a permanent or semi-permanent layer of ice. It is identified with the letter E in the Köppen climate classification. Subtypes There are two types of polar climate: ET, or tundra climate; and EF, or ice cap climate. A tundra climate is characterized by having at least one month whose average temperature is above , while an ice cap climate has no months averaging above . In a tundra climate, even coniferous trees cannot grow, but o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
