130-560: S-68 was a sports club from Greenland based in Sisimiut . They competed in football and handball . This article about a Greenlandic football club is a stub . You can help Misplaced Pages by expanding it . This article about a handball team / club is a stub . You can help Misplaced Pages by expanding it . Greenland Greenland ( Greenlandic : Kalaallit Nunaat , pronounced [kalaːɬːit nʉnaːt] ; Danish : Grønland , pronounced [ˈkʁɶnˌlænˀ] )
260-660: A maritime border , to the west and southwest across Nares Strait and Baffin Bay, as well as a shared land border on Hans Island ; and Iceland, southeast of Greenland in the Atlantic Ocean. Greenland also contains the world's largest national park , and it is the largest constituent country by area in the world, and is the fourth largest country subdivision in the world , after Sakha Republic in Russia, Australia's state of Western Australia , and Russia's Krasnoyarsk Krai , and
390-476: A series of expeditions to Greenland and Arctic waterways to locate the lost eastern Norse settlement and assert Danish-Norwegian sovereignty over Greenland. The expeditions were mostly unsuccessful, partly due to leaders who lacked experience with the difficult Arctic ice and weather conditions, and partly because the expedition leaders were given instructions to search for the Eastern Settlement on
520-493: A Southern Europe hydropower race. In Italy's Po Valley , the main 20th century transition was not the creation of hydropower but the transition from mechanical to electrical hydropower. 12,000 watermills churned in the Po watershed in the 1890s, but the first commercial hydroelectric plant, completed in 1898, signaled the end of the mechanical reign. These new large plants moved power away from rural mountainous areas to urban centers in
650-443: A billion tonnes of CO2 greenhouse gas a year. This occurs when organic matters accumulate at the bottom of the reservoir because of the deoxygenation of water which triggers anaerobic digestion . People who live near a hydro plant site are displaced during construction or when reservoir banks become unstable. Another potential disadvantage is cultural or religious sites may block construction. A watermill or water mill
780-433: A device to serve wine, and five devices to lift water from rivers or pools, where three of them are animal-powered and one can be powered by animal or water. Moreover, they included an endless belt with jugs attached, a cow-powered shadoof (a crane-like irrigation tool), and a reciprocating device with hinged valves. In the 19th century, French engineer Benoît Fourneyron developed the first hydropower turbine. This device
910-464: A microturbine in a cylindrical housing. Electricity generated by that turbine is used to charge 12-volt batteries." The term rain power has also been applied to hydropower systems which include the process of capturing the rain. Evidence suggests that the fundamentals of hydropower date to ancient Greek civilization . Other evidence indicates that the waterwheel independently emerged in China around
1040-490: A mutual need for hydropower could lead to cooperation between otherwise adversarial nations. Hydropower technology and attitude began to shift in the second half of the 20th century. While countries had largely abandoned their small hydropower systems by the 1930s, the smaller hydropower plants began to make a comeback in the 1970s, boosted by government subsidies and a push for more independent energy producers. Some politicians who once advocated for large hydropower projects in
1170-486: A number lost their cultural ties to Greenland. While the policies "succeeded" in the sense of shifting Greenlanders from being primarily subsistence hunters into being urbanized wage earners, the Greenlandic elite began to reassert a Greenlandic cultural identity. A movement developed in favour of independence, reaching its peak in the 1970s. As a consequence of political complications in relation to Denmark's entry into
1300-423: A number of governmental services and areas of competence. The Danish government retains control of citizenship, monetary policy, and foreign affairs, including defence. Most residents of Greenland are Inuit. The population is concentrated mainly on the southwest coast, and the rest of the island is sparsely populated. Three-quarters of Greenland is covered by the only permanent ice sheet outside Antarctica . With
1430-693: A population of 56,583 (2022), Greenland is the least densely populated region in the world. Sixty-seven percent of its electricity production comes from renewable energy, mostly from hydropower . The early Norse settlers named the island Greenland . In the Icelandic sagas , the Norwegian Erik the Red was exiled from Iceland with his father, Thorvald, who had committed manslaughter. With his extended family and his thralls ( slaves or serfs ) , he set out in ships to explore an icy land known to lie to
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#17327874818671560-501: A relatively consistent source of power. Nonetheless, it has economic, sociological, and environmental downsides and requires a sufficiently energetic source of water, such as a river or elevated lake . International institutions such as the World Bank view hydropower as a low-carbon means for economic development . Since ancient times, hydropower from watermills has been used as a renewable energy source for irrigation and
1690-527: A relatively mild climate, several degrees Celsius warmer than usual in the North Atlantic with trees and herbaceous plants growing and livestock being farmed. Barley was grown as a crop up to the 70th parallel. The ice cores show that Greenland has had dramatic temperature shifts many times in the past 100,000 years. Similarly the Icelandic Book of Settlements records famines during
1820-535: A remote sensor." Villazon suggested a better application would be to collect the water from fallen rain and use it to drive a turbine, with an estimated energy generation of 3 kWh of energy per year for a 185 m roof. A microturbine-based system created by three students from the Technological University of Mexico has been used to generate electricity. The Pluvia system "uses the stream of rainwater runoff from houses' rooftop rain gutters to spin
1950-494: A result of the COVID-19 pandemic ; one source describes it as being the "biggest economic victim of the coronavirus" (the overall economy did not suffer too severely as of mid-2020, thanks to the fisheries "and a hefty subsidy from Copenhagen"). Greenland's goal for returning tourism is to develop it "right" and to "build a more sustainable tourism for the long run". Greenland is the world's largest non-continental island and
2080-464: A sense of self-reliance through self-government and independent communication with the outside world. Despite this change, in 1946 a commission including the highest Greenlandic council, the Landsrådene , recommended patience and no radical reform of the system. Two years later, the first step towards a change of government was initiated when a grand commission was established. A final report (G-50)
2210-403: A separate people under international law . Denmark maintains control of foreign affairs and defence matters. Denmark upholds the annual block grant of 3.2 billion Danish kroner, but as Greenland begins to collect revenues of its natural resources, the grant will gradually be diminished. This is generally considered to be a step toward eventual full independence from Denmark. Greenlandic
2340-446: A stream can vary widely from season to season. The development of a hydropower site requires analysis of flow records , sometimes spanning decades, to assess the reliable annual energy supply. Dams and reservoirs provide a more dependable source of power by smoothing seasonal changes in water flow. However, reservoirs have a significant environmental impact , as does alteration of naturally occurring streamflow. Dam design must account for
2470-684: A tool to interfere in the economic development of African countries, such as the World Bank with the Kariba and Akosombo Dams , and the Soviet Union with the Aswan Dam . The Nile River especially has borne the consequences of countries both along the Nile and distant foreign actors using the river to expand their economic power or national force. After the British occupation of Egypt in 1882,
2600-485: A turbine with 90% efficiency. He applied scientific principles and testing methods to the problem of turbine design. His mathematical and graphical calculation methods allowed the confident design of high-efficiency turbines to exactly match a site's specific flow conditions. The Francis reaction turbine is still in use. In the 1870s, deriving from uses in the California mining industry, Lester Allan Pelton developed
2730-532: Is Nuuk . Greenland lies between the Arctic and Atlantic oceans, east of the Canadian Arctic Archipelago . It is the world's largest island , and is the location of the northernmost point of land in the world – Kaffeklubben Island off the northern coast is the world's northernmost undisputed point of land , and Cape Morris Jesup on the mainland was thought to be so until
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#17327874818672860-560: Is 2,166,086 km (836,330 sq mi) (including other offshore minor islands), of which the Greenland ice sheet covers 1,755,637 km (677,855 sq mi) (81%) and has a volume of approximately 2,850,000 km (680,000 cu mi). The highest point on Greenland is Gunnbjørn Fjeld at 3,700 m (12,100 ft) of the Watkins Range ( East Greenland mountain range ). The majority of Greenland, however,
2990-736: Is a North American island autonomous territory of the Kingdom of Denmark . It is the larger of two autonomous territories within the Kingdom, the other being the Faroe Islands ; the citizens of both territories are full citizens of Denmark . As Greenland is one of the Overseas Countries and Territories of the European Union , citizens of Greenland are European Union citizens . The capital and largest city of Greenland
3120-535: Is a mill that uses hydropower. It is a structure that uses a water wheel or water turbine to drive a mechanical process such as milling (grinding) , rolling , or hammering . Such processes are needed in the production of many material goods, including flour , lumber , paper , textiles , and many metal products. These watermills may comprise gristmills , sawmills , paper mills , textile mills , hammermills , trip hammering mills, rolling mills , and wire drawing mills. One major way to classify watermills
3250-509: Is achieved by converting the gravitational potential or kinetic energy of a water source to produce power. Hydropower is a method of sustainable energy production. Hydropower is now used principally for hydroelectric power generation , and is also applied as one half of an energy storage system known as pumped-storage hydroelectricity . Hydropower is an attractive alternative to fossil fuels as it does not directly produce carbon dioxide or other atmospheric pollutants and it provides
3380-501: Is available on demand to be used to generate electricity by passing through channels that connect the dam to the reservoir. The water spins a turbine, which is connected to the generator that produces electricity. The other type is called a run-of-river plant. In this case, a barrage is built to control the flow of water, absent a reservoir . The run-of river power plant needs continuous water flow and therefore has less ability to provide power on demand. The kinetic energy of flowing water
3510-400: Is by an essential trait about their location: tide mills use the movement of the tide; ship mills are water mills onboard (and constituting) a ship. A plentiful head of water can be made to generate compressed air directly without moving parts. In these designs, a falling column of water is deliberately mixed with air bubbles generated through turbulence or a venturi pressure reducer at
3640-445: Is by using hybrid solar panels called "all-weather solar panels" that can generate electricity from both the sun and the rain. According to zoologist and science and technology educator, Luis Villazon, "A 2008 French study estimated that you could use piezoelectric devices, which generate power when they move, to extract 12 milliwatts from a raindrop. Over a year, this would amount to less than 0.001kWh per square metre – enough to power
3770-420: Is by wheel orientation (vertical or horizontal), one powered by a vertical waterwheel through a gear mechanism, and the other equipped with a horizontal waterwheel without such a mechanism. The former type can be further subdivided, depending on where the water hits the wheel paddles, into undershot, overshot, breastshot and pitchback (backshot or reverse shot) waterwheel mills. Another way to classify water mills
3900-461: Is less than 1,500 m (4,900 ft) in elevation. Below the ice there is a series of canyons, the biggest called Greenland’s Grand Canyon which was formed by flowing rivers of water from the repeated cycle of ice melting and new ice forming. Near the coast elevations rise suddenly and steeply. The ice flows generally to the coast from the centre of the island. A survey led by French scientist Paul-Emile Victor in 1951 concluded that, under
4030-439: Is lost from erosion. Furthermore, studies found that the construction of dams and reservoirs can result in habitat loss for some aquatic species. Large and deep dam and reservoir plants cover large areas of land which causes greenhouse gas emissions from underwater rotting vegetation. Furthermore, although at lower levels than other renewable energy sources, it was found that hydropower produces methane equivalent to almost
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4160-782: Is low compared with other countries (over one million species have been described worldwide). The sea is rich in fish and invertebrates, especially in the milder West Greenland Current ; a large part of the Greenland fauna is associated with marine-based food chains, including large colonies of seabirds. The few native land mammals in Greenland include the polar bear , reindeer (introduced by Europeans), arctic fox , arctic hare , musk ox , collared lemming , ermine , and arctic wolf . The last four are found naturally only in East Greenland , having immigrated from Ellesmere Island . There are dozens of species of seals and whales along
4290-423: Is not part of any municipality, but it is the site of the world's largest national park, Northeast Greenland National Park . At least four scientific expedition stations and camps had been established on the ice sheet in the ice-covered central part of Greenland (indicated as pale blue in the adjacent map): Eismitte , North Ice , North GRIP Camp and The Raven Skiway. There is a year-round station Summit Camp on
4420-403: Is the decreased efficiency of electricity generation because the process depends on the speed of the seasonal river flow. This means that the rainy season increases electricity generation compared to the dry season. The size of hydroelectric plants can vary from small plants called micro hydro , to large plants that supply power to a whole country. As of 2019, the five largest power stations in
4550-407: Is the energy per unit weight (or unit mass) of water. The static head is proportional to the difference in height through which the water falls. Dynamic head is related to the velocity of moving water. Each unit of water can do an amount of work equal to its weight times the head. The power available from falling water can be calculated from the flow rate and density of water, the height of fall, and
4680-423: Is the main source of energy. Both designs have limitations. For example, dam construction can result in discomfort to nearby residents. The dam and reservoirs occupy a relatively large amount of space that may be opposed by nearby communities. Moreover, reservoirs can potentially have major environmental consequences such as harming downstream habitats. On the other hand, the limitation of the run-of-river project
4810-423: Is used to validate the manufacturer's efficiency guarantee. Detailed calculation of the efficiency of a hydropower turbine accounts for the head lost due to flow friction in the power canal or penstock, rise in tailwater level due to flow, the location of the station and effect of varying gravity, the air temperature and barometric pressure, the density of the water at ambient temperature, and the relative altitudes of
4940-506: The Skrælings (Norse word for Inuit, meaning "wretches" ). Recent archeological studies somewhat challenge the general assumption that the Norse colonization had a dramatic negative environmental effect on the vegetation. Data support traces of a possible Norse soil amendment strategy. More recent evidence suggests that the Norse, who never numbered more than about 2,500, gradually abandoned
5070-522: The Atlantic meridional overturning circulation , or AMOC, by diluting key currents, slowing it down. Due to this meltwater input, the circulation may even collapse outright, with widespread detrimental effects, although research suggests this is only likely if highest possible warming is sustained for multiple centuries. Greenland ice sheet has a great volume of ~2,900,000 cubic kilometres (696,000 cu mi). This means that if it were all to melt,
5200-924: The Columbia River and its tributaries. The Bureau of Reclamation built the Hoover Dam in 1931, symbolically linking the job creation and economic growth priorities of the New Deal . The federal government quickly followed Hoover with the Shasta Dam and Grand Coulee Dam . Power demand in Oregon did not justify damming the Columbia until WWI revealed the weaknesses of a coal-based energy economy. The federal government then began prioritizing interconnected power—and lots of it. Electricity from all three dams poured into war production during WWII . After
5330-656: The Democratic Republic of the Congo and Ghana , frequently sell excess power to neighboring countries. Foreign actors such as Chinese hydropower companies have proposed a significant amount of new hydropower projects in Africa, and already funded and consulted on many others in countries like Mozambique and Ghana. Small hydropower also played an important role in early 20th century electrification across Africa. In South Africa, small turbines powered gold mines and
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5460-710: The European Economic Community (EEC) upon achieving self-rule, as it did not agree with the EEC's commercial fishing regulations and an EEC ban on seal skin products. Greenland voters approved a referendum on greater autonomy on 25 November 2008. According to one study, the 2008 vote created what "can be seen as a system between home rule and full independence". On 21 June 2009, Greenland gained self-rule with provisions for assuming responsibility for self-government of judicial affairs , policing, and natural resources . Also, Greenlanders were recognized as
5590-602: The Industrial Revolution would drive development as well. At the beginning of the Industrial Revolution in Britain, water was the main power source for new inventions such as Richard Arkwright 's water frame . Although water power gave way to steam power in many of the larger mills and factories, it was still used during the 18th and 19th centuries for many smaller operations, such as driving
5720-697: The Mauryan , Gupta and Chola empires. Another example of the early use of hydropower is seen in hushing , a historic method of mining that uses flood or torrent of water to reveal mineral veins. The method was first used at the Dolaucothi Gold Mines in Wales from 75 AD onwards. This method was further developed in Spain in mines such as Las Médulas . Hushing was also widely used in Britain in
5850-891: The Medieval and later periods to extract lead and tin ores. It later evolved into hydraulic mining when used during the California Gold Rush in the 19th century. The Islamic Empire spanned a large region, mainly in Asia and Africa, along with other surrounding areas. During the Islamic Golden Age and the Arab Agricultural Revolution (8th–13th centuries), hydropower was widely used and developed. Early uses of tidal power emerged along with large hydraulic factory complexes. A wide range of water-powered industrial mills were used in
5980-494: The Skaergaard intrusion . Notable rock provinces ( metamorphic igneous rocks, ultramafics, and anorthosites) are found on the southwest coast at Qeqertarsuatsiaat. East of Nuuk, the banded iron ore region of Isukasia, over three billion years old, contains the world's oldest rocks, such as greenlandite (a rock composed predominantly of hornblende and hyperthene), formed 3.8 billion years ago, and nuummite. In southern Greenland,
6110-430: The 13th century and later, and are not primary sources for the history of early Norse Greenland. Those accounts are closer to primary for more contemporaneous accounts of late Norse Greenland. Modern understanding therefore mostly depends on the physical data from archeological sites. Interpretation of ice-core and clam-shell data suggests that between AD 800 and 1300 the regions around the fjords of southern Greenland had
6240-563: The 1920s suggest that the condition of human bones from this period indicates that the Norse population was malnourished, possibly because of soil erosion resulting from the Norsemen's destruction of natural vegetation in the course of farming, turf-cutting, and wood-cutting. Malnutrition may also have resulted from widespread deaths from pandemic plague; the decline in temperatures during the Little Ice Age; and armed conflicts with
6370-411: The 1960s. Though a part of the continent of North America, Greenland has been politically and culturally associated with Europe (specifically Norway and Denmark, the colonial powers) for more than a millennium, beginning in 986. Greenland has been inhabited at intervals over at least the last 4,500 years by circumpolar peoples whose forebears migrated there from what is now Canada. Norsemen settled
6500-486: The 2021 event, rain fell at Greenland's highest point for the first time in recorded history: an event so unexpected that the research station at the summit had no rain gauges for the occasion. As with the ice losses elsewhere, the melting of Greenland contributes to sea level rise. Between 2012 and 2017, this melting had added an average of 0.68 mm per year, which was equivalent to 37% of sea level rise from land ice sources (excluding thermal expansion of water from
6630-485: The 4th century BC refer to the term cakkavattaka (turning wheel), which commentaries explain as arahatta-ghati-yanta (machine with wheel-pots attached), however whether this is water or hand powered is disputed by scholars India received Roman water mills and baths in the early 4th century AD when a certain according to Greek sources. Dams, spillways, reservoirs, channels, and water balance would develop in India during
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#17327874818676760-836: The American West, organized opposition to hydroelectric dams sparked up in the 1950s and 60s based on environmental concerns. Environmental movements successfully shut down proposed hydropower dams in Dinosaur National Monument and the Grand Canyon , and gained more hydropower-fighting tools with 1970s environmental legislation. As nuclear and fossil fuels grew in the 70s and 80s and environmental activists push for river restoration, hydropower gradually faded in American importance. Foreign powers and IGOs have frequently used hydropower projects in Africa as
6890-679: The British worked with Egypt to construct the first Aswan Dam, which they heightened in 1912 and 1934 to try to hold back the Nile floods. Egyptian engineer Adriano Daninos developed a plan for the Aswan High Dam, inspired by the Tennessee Valley Authority's multipurpose dam. When Gamal Abdel Nasser took power in the 1950s, his government decided to undertake the High Dam project, publicizing it as an economic development project. After American refusal to help fund
7020-687: The Early Dorset culture emerged in western Greenland and the Independence II culture in northern Greenland. The Dorset culture was the first culture to extend throughout the Greenlandic coastal areas, in the west and the east. It lasted until the total onset of the Thule culture , in AD ;1500. The people of the Dorset culture lived mainly by hunting whales and reindeer . From 986,
7150-692: The European Common Market in 1972, Denmark began to seek a different status for Greenland, resulting in the Home Rule Act of 1979. This gave Greenland limited autonomy with its own legislature taking control of some internal policies, while the Parliament of Denmark maintained full control of external policies, security, and natural resources. The law came into effect on 1 May 1979. The King of Denmark , Frederik X , remains Greenland's head of state . In 1985, Greenland left
7280-697: The Grand Coulee to build a nuclear site placed on the banks of the Columbia. The nuclear site leaked radioactive matter into the river, contaminating the entire area. Post-WWII Americans, especially engineers from the Tennessee Valley Authority , refocused from simply building domestic dams to promoting hydropower abroad. While domestic dam building continued well into the 1970s, with the Reclamation Bureau and Army Corps of Engineers building more than 150 new dams across
7410-447: The Greenland settlements over the 15th century as walrus ivory , the most valuable export from Greenland, decreased in price because of competition with other sources of higher-quality ivory, and that there was actually little evidence of starvation or difficulties. Other explanations of the disappearance of the Norse settlements have been proposed: The Thule people are the ancestors of the current Greenlandic population. No genes from
7540-612: The Hun waterwheel; some of the earliest ones are the Jijiupian dictionary of 40 BC, Yang Xiong 's text known as the Fangyan of 15 BC, as well as Xin Lun, written by Huan Tan about 20 AD. It was also during this time that the engineer Du Shi (c. AD 31) applied the power of waterwheels to piston - bellows in forging cast iron. Ancient Indian texts dating back to
7670-727: The Illimaussaq alkaline complex consists of pegmatites such as nepheline, syenites (especially kakortokite or naujaite) and sodalite (sodalite-foya). In Ivittuut, where cryolite was formerly mined, there are fluoride -bearing pegmatites. To the north of Igaliku, there are the Gardar alkaline pegmatitic intrusions of augite syenite, gabbro, etc. To the west and southwest are Palaeozoic carbonatite complexes at Kangerlussuaq (Gardiner complex) and Safartoq, and basic and ultrabasic igneous rocks at Uiffaq on Disko Island, where there are masses of heavy native iron up to 25 t (28 short tons) in
7800-675: The Inuit. It is republished in The Norse Atlantic Sagas , by Gwyn Jones. Jones reports that there is also an account of perhaps the same incident, of more doubtful provenance, told by the Norse side. In 1500, King Manuel I of Portugal sent Gaspar Corte-Real to Greenland in search of a Northwest Passage to Asia which, according to the Treaty of Tordesillas , was part of Portugal's sphere of influence. In 1501, Corte-Real returned with his brother, Miguel Corte-Real . Finding
7930-639: The Nile, hydroelectric projects cover the rivers and lakes of Africa. The Inga powerplant on the Congo River had been discussed since Belgian colonization in the late 19th century, and was successfully built after independence. Mobutu's government failed to regularly maintain the plants and their capacity declined until the 1995 formation of the Southern African Power Pool created a multi-national power grid and plant maintenance program. States with an abundance of hydropower, such as
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#17327874818678060-603: The Norse. When it re-established contact with Greenland in the early 17th century, Denmark-Norway asserted its sovereignty over the island. In 1721 a joint mercantile and clerical expedition led by Dano-Norwegian missionary Hans Egede was sent to Greenland, not knowing whether a Norse civilization remained there. This expedition is part of the Dano-Norwegian colonization of the Americas . After 15 years in Greenland, Hans Egede left his son Paul Egede in charge of
8190-462: The Paleo-Inuit have been found in the present population of Greenland. The Thule culture migrated eastward from what is now known as Alaska around 1000 AD, reaching Greenland around 1300. The Thule culture was the first to introduce to Greenland such technological innovations as dog sleds and toggling harpoons . There is an account of contact and conflict with the Norse population, as told by
8320-616: The Thule culture, who entered from the north. Norse Greenlanders submitted to Norwegian rule in 1261 under the Kingdom of Norway . The Kingdom of Norway entered a personal union with Denmark in 1380, and from 1397 was a part of the Kalmar Union . The Norse settlements, such as Brattahlíð , thrived for centuries, before disappearing in the 15th century, perhaps at the onset of the Little Ice Age . Except some runic inscriptions,
8450-431: The United States developed a geopolitical interest in Greenland and in 1946 offered to buy the island from Denmark for $ 100,000,000; the Danish rejected the offer. In the 21st century, the United States remains interested in investing in the resource base of Greenland and in tapping hydrocarbons off the Greenlandic coast. In August 2019, the US again proposed to buy the country, prompting premier Kim Kielsen to issue
8580-905: The United States' hydroelectric plants in Niagara Falls and the Sierra Nevada inspired bigger and bolder creations across the globe. American and USSR financers and hydropower experts also spread the gospel of dams and hydroelectricity across the globe during the Cold War , contributing to projects such as the Three Gorges Dam and the Aswan High Dam . Feeding desire for large scale electrification with water inherently required large dams across powerful rivers, which impacted public and private interests downstream and in flood zones. Inevitably smaller communities and marginalized groups suffered. They were unable to successfully resist companies flooding them out of their homes or blocking traditional salmon passages. The stagnant water created by hydroelectric dams provides breeding ground for pests and pathogens , leading to local epidemics . However, in some cases,
8710-448: The atlas's editor, commented: In the last two or three decades, global warming has reduced the size of glaciers throughout the Arctic and earlier this year, news sources confirmed what climate scientists already knew: water, not rock, lay beneath this ice bridge on the east coast of Greenland. More islets are likely to appear as the sheet of frozen water covering the world's largest island continues to melt. Some controversy surrounds
8840-473: The basalts. The paleontology of East Greenland is specially rich, with some of the early tetrapods such as the Devonian Acanthostega and Ichthyostega , and unique triassic animals such as the phytosaur Mystriosuchus alleroq and the dinosaurs Issi saaneq and tracks. Greenland is home to two ecoregions: Kalaallit Nunaat high arctic tundra and Kalaallit Nunaat low arctic tundra . There are approximately 700 known species of insects in Greenland, which
8970-441: The bellows in small blast furnaces (e.g. the Dyfi Furnace ) and gristmills , such as those built at Saint Anthony Falls , which uses the 50-foot (15 m) drop in the Mississippi River . Technological advances moved the open water wheel into an enclosed turbine or water motor . In 1848, the British-American engineer James B. Francis , head engineer of Lowell's Locks and Canals company, improved on these designs to create
9100-426: The coast. Land fauna consists predominantly of animals which have spread from North America or, in the case of many birds and insects, from Europe. There are no native or free-living reptiles or amphibians on the island. Hydropower Hydropower (from Ancient Greek ὑδρο -, "water"), also known as water power , is the use of falling or fast-running water to produce electricity or to power machines. This
9230-552: The continual increase in the ocean heat content ). By the end of the century, the melting of Greenland alone would add between ~ 6 cm ( 2 + 1 ⁄ 2 in) if the temperatures are kept below 2 °C (3.6 °F), to around 13 cm (5 in) if the most intense climate change scenario with ever-increasing greenhouse gas emissions is followed. Under this scenario, the worst case for Greenland melting could reach 33 cm (13 in) of sea level rise equivalent. The large quantities of fresh meltwater also affect
9360-649: The control of the Danish monarch. Norway occupied then-uninhabited eastern Greenland as Erik the Red's Land in July 1931, claiming that it constituted terra nullius . Norway and Denmark agreed to submit the matter in 1933 to the Permanent Court of International Justice , which decided against Norway. Greenland's connection to Denmark was severed on 9 April 1940, early in World War ;II , after Denmark
9490-440: The cost of building new hydroelectric dams increased 4% annually between 1965 and 1990, due both to the increasing costs of construction and to the decrease in high quality building sites. In the 1990s, only 18% of the world's electricity came from hydropower. Tidal power production also emerged in the 1960s as a burgeoning alternative hydropower system, though still has not taken hold as a strong energy contender. Especially at
9620-673: The dam, and anti-British sentiment in Egypt and British interests in neighboring Sudan combined to make the United Kingdom pull out as well, the Soviet Union funded the Aswan High Dam. Between 1977 and 1990 the dam's turbines generated one third of Egypt's electricity. The building of the Aswan Dam triggered a dispute between Sudan and Egypt over the sharing of the Nile, especially since the dam flooded part of Sudan and decreased
9750-619: The early 20th century, two major factors motivated the expansion of hydropower in Europe: in the northern countries of Norway and Sweden high rainfall and mountains proved exceptional resources for abundant hydropower, and in the south coal shortages pushed governments and utility companies to seek alternative power sources. Early on, Switzerland dammed the Alpine rivers and the Swiss Rhine , creating, along with Italy and Scandinavia ,
9880-474: The east coast of Greenland just north of Cape Farewell , which is almost inaccessible due to southward drifting ice . The pilot on all three trips was English explorer James Hall . After the Norse settlements died off, Greenland came under the de facto control of various Inuit groups, but the Dano-Norwegian government never forgot or relinquished the claims to Greenland that it had inherited from
10010-582: The existence of a new island was announced. Named " Uunartoq Qeqertaq " (English: Warming Island ), this island has always been present off the coast of Greenland, but was covered by a glacier. This glacier was discovered in 2002 to be shrinking rapidly, and by 2007 had completely melted away, leaving the exposed island. The island was named Place of the Year by the Oxford Atlas of the World in 2007. Ben Keene,
10140-623: The facilities. After the collapse of the Third Reich, Albert Speer briefly considered escaping in a small aeroplane to hide out in Greenland, but changed his mind and decided to surrender to the United States Armed Forces . Greenland had been a protected and very isolated society until 1940. The Danish government had maintained a strict monopoly of Greenlandic trade , allowing no more than small scale barter trading with British whalers. In wartime Greenland developed
10270-570: The falls far enough away to actually reach enough people and justify installation. The project succeeded in large part due to Nikola Tesla's invention of the alternating current motor . On the other side of the country, San Francisco engineers, the Sierra Club , and the federal government fought over acceptable use of the Hetch Hetchy Valley . Despite ostensible protection within a national park, city engineers successfully won
10400-590: The first century BC. The Barbegal mill , located in modern-day France, had 16 water wheels processing up to 28 tons of grain per day. Roman waterwheels were also used for sawing marble such as the Hierapolis sawmill of the late 3rd century AD. Such sawmills had a waterwheel that drove two crank-and-connecting rods to power two saws. It also appears in two 6th century Eastern Roman sawmills excavated at Ephesus and Gerasa respectively. The crank and connecting rod mechanism of these Roman watermills converted
10530-446: The first electric railway in the 1890s, and Zimbabwean farmers installed small hydropower stations in the 1930s. While interest faded as national grids improved in the second half of the century, 21st century national governments in countries including South Africa and Mozambique, as well as NGOs serving countries like Zimbabwe, have begun re-exploring small-scale hydropower to diversify power sources and improve rural electrification. In
10660-403: The first half of the 20th century began to speak out against them, and citizen groups organizing against dam projects increased. In the 1980s and 90s the international anti-dam movement had made finding government or private investors for new large hydropower projects incredibly difficult, and given rise to NGOs devoted to fighting dams. Additionally, while the cost of other energy sources fell,
10790-446: The forebay and tailbay. For precise calculations, errors due to rounding and the number of significant digits of constants must be considered. Some hydropower systems such as water wheels can draw power from the flow of a body of water without necessarily changing its height. In this case, the available power is the kinetic energy of the flowing water. Over-shot water wheels can efficiently capture both types of energy. The flow in
10920-447: The global sea levels would increase by ~7.4 m (24 ft) from that alone. However, it also means that it will take at least 1,000 years for the ice sheet to disappear even with very high warming, and in around 10,000 years under lower warming which still crosses the threshold for the ice sheet's disappearance. This threshold likely lies for the global warming between 1.7 °C (3.1 °F) and 2.3 °C (4.1 °F). Reducing
11050-522: The high-efficiency Pelton wheel impulse turbine , which used hydropower from the high head streams characteristic of the Sierra Nevada . The modern history of hydropower begins in the 1900s, with large dams built not simply to power neighboring mills or factories but provide extensive electricity for increasingly distant groups of people. Competition drove much of the global hydroelectric craze: Europe competed amongst itself to electrify first, and
11180-400: The high-level intake. This allows it to fall down a shaft into a subterranean, high-roofed chamber where the now-compressed air separates from the water and becomes trapped. The height of the falling water column maintains compression of the air in the top of the chamber, while an outlet, submerged below the water level in the chamber allows water to flow back to the surface at a lower level than
11310-401: The highest among all renewable energy technologies. Hydroelectricity generation starts with converting either the potential energy of water that is present due to the site's elevation or the kinetic energy of moving water into electrical energy. Hydroelectric power plants vary in terms of the way they harvest energy. One type involves a dam and a reservoir . The water in the reservoir
11440-405: The history of the island, specifically over whether the island might have been revealed during a brief warm period in Greenland during the mid-20th century. Greenland ice sheet always loses some mass from ice calving at its coasts, but it used to gain more ice on average due to the accumulation of snowfall. Yet, Greenland has been warming starting from around 1900, and starting from 1980s,
11570-422: The ice sheet, Greenland is composed of three large islands. This is disputed, but if it is so, they would be separated by narrow straits, reaching the sea at Ilulissat Icefjord , at Greenland's Grand Canyon and south of Nordostrundingen . All towns and settlements of Greenland are situated along the ice-free coast, with the population being concentrated along the west coast. The northeastern part of Greenland
11700-402: The ice sheet, established in 1989. The radio station Jørgen Brønlund Fjord was, until 1950, the northernmost permanent outpost in the world. The extreme north of Greenland, Peary Land , is not covered by an ice sheet, because the air there is too dry to produce snow, which is essential in the production and maintenance of an ice sheet. If the Greenland ice sheet were to melt away completely,
11830-598: The intake. A separate outlet in the roof of the chamber supplies the compressed air. A facility on this principle was built on the Montreal River at Ragged Shutes near Cobalt, Ontario , in 1910 and supplied 5,000 horsepower to nearby mines. Hydroelectricity is the biggest hydropower application. Hydroelectricity generates about 15% of global electricity and provides at least 50% of the total electricity supply for more than 35 countries. In 2021, global installed hydropower electrical capacity reached almost 1400 GW,
11960-608: The largest in North America. The lowest temperature ever recorded in the Northern Hemisphere was recorded in Greenland, near the topographic summit of the Greenland Ice Sheet , on 22 December 1991, when the temperature reached −69.6 °C (−93.3 °F). In Nuuk, the average daily temperature varies over the seasons from −5.1 to 9.9 °C (22.8 to 49.8 °F). The total area of Greenland
12090-497: The last unexploited energy sources in nature. When it rains, billions of litres of water can fall, which have an enormous electric potential if used in the right way." Research is being done into the different methods of generating power from rain, such as by using the energy in the impact of raindrops. This is in its very early stages with new and emerging technologies being tested, prototyped and created. Such power has been called rain power. One method in which this has been attempted
12220-572: The local acceleration due to gravity: To illustrate, the power output of a turbine that is 85% efficient, with a flow rate of 80 cubic metres per second (2800 cubic feet per second) and a head of 145 metres (476 feet), is 97 megawatts: Operators of hydroelectric stations compare the total electrical energy produced with the theoretical potential energy of the water passing through the turbine to calculate efficiency. Procedures and definitions for calculation of efficiency are given in test codes such as ASME PTC 18 and IEC 60041. Field testing of turbines
12350-479: The losses became larger than the gains. After 1996, Greenland has not had a single year when it did not lose mass on average. In 2010s, Greenland ice sheet had been melting at its fastest rate over at least the past 12,000 years, and on track to exceed that later in the century. In 2012, 2019 and 2021, so-called "massive melting events" had occurred, when practically the entire surface of the ice sheet had been melting and no accumulation had been taking place. During
12480-417: The mission there and returned to Denmark, where he established a Greenland Seminary. This new colony was centred at Godthåb ("Good Hope") on the southwest coast. Gradually, Greenland was opened up to Danish merchants, but closed to those from other countries. When the union between the crowns of Denmark and Norway was dissolved in 1814, the Treaty of Kiel severed Norway's former colonies and left them under
12610-411: The northwest. After finding a habitable area and settling there, he named it Grœnland (translated as "Greenland"), supposedly in the hope that the pleasant name would attract settlers. The Saga of Erik the Red states: "In the summer, Erik left to settle in the country he had found, which he called Greenland, as he said people would be attracted there if it had a favorable name." The name of
12740-512: The only contemporary records or historiography that survives from the Norse settlements is of their contact with Iceland or Norway. Medieval Norwegian sagas and historical works mention Greenland's economy, the bishops of Gardar , and the collection of tithes. A chapter in the Konungs skuggsjá ( The King's Mirror ) describes Norse Greenland 's exports, imports, and grain cultivation. Icelandic saga accounts of life in Greenland were composed in
12870-423: The operation of mechanical devices, such as gristmills , sawmills , textile mills, trip hammers , dock cranes , domestic lifts , and ore mills . A trompe , which produces compressed air from falling water, is sometimes used to power other machinery at a distance. A hydropower resource can be evaluated by its available power . Power is a function of the hydraulic head and volumetric flow rate . The head
13000-490: The people in Greenland citizens of Denmark. In the 1979 Greenlandic home rule referendum , Denmark granted home rule to Greenland; in the 2008 Greenlandic self-government referendum , Greenlanders voted for the Self-Government Act, which transferred more power from the Danish government to the local Naalakkersuisut (Greenlandic government). Under this structure, Greenland gradually assumed responsibility for
13130-606: The region including fulling mills, gristmills , paper mills , hullers , sawmills , ship mills , stamp mills , steel mills , sugar mills , and tide mills . By the 11th century, every province throughout the Islamic Empire had these industrial mills in operation, from Al-Andalus and North Africa to the Middle East and Central Asia . Muslim engineers also used water turbines while employing gears in watermills and water-raising machines. They also pioneered
13260-477: The rights to both water and power in the Hetch Hetchy Valley in 1913. After their victory they delivered Hetch Hetchy hydropower and water to San Francisco a decade later and at twice the promised cost, selling power to PG&E which resold to San Francisco residents at a profit. The American West, with its mountain rivers and lack of coal, turned to hydropower early and often, especially along
13390-514: The rotary motion of the waterwheel into the linear movement of the saw blades. Water-powered trip hammers and bellows in China, during the Han dynasty (202 BC – 220 AD), were initially thought to be powered by water scoops . However, some historians suggested that they were powered by waterwheels. This is since it was theorized that water scoops would not have had the motive force to operate their blast furnace bellows. Many texts describe
13520-513: The same period. Evidence of water wheels and watermills date to the ancient Near East in the 4th century BC. Moreover, evidence indicates the use of hydropower using irrigation machines to ancient civilizations such as Sumer and Babylonia . Studies suggest that the water wheel was the initial form of water power and it was driven by either humans or animals. In the Roman Empire , water-powered mills were described by Vitruvius by
13650-577: The sea frozen, they headed south and arrived in Labrador and Newfoundland . Upon the brothers' return to Portugal, the cartographic information supplied by Corte-Real was incorporated into a new map of the world which was presented to Ercole I d'Este , Duke of Ferrara , by Alberto Cantino in 1502. The Cantino planisphere , made in Lisbon, accurately depicts the southern coastline of Greenland. In 1605–1607, King Christian IV of Denmark and Norway sent
13780-552: The start of the American hydropower experiment, engineers and politicians began major hydroelectricity projects to solve a problem of 'wasted potential' rather than to power a population that needed the electricity. When the Niagara Falls Power Company began looking into damming Niagara, the first major hydroelectric project in the United States, in the 1890s they struggled to transport electricity from
13910-490: The statement, "Greenland is not for sale and cannot be sold, but Greenland is open for trade and cooperation with other countries—including the United States." In 1950, Denmark agreed to allow the US to regain the use of Thule Air Base ; it was greatly expanded between 1951 and 1953 as part of a unified NATO Cold War defence strategy. The local population of three nearby villages was moved more than 100 km (62 miles) away in
14040-451: The system of government changed: Governor Eske Brun ruled the island under a law of 1925 that allowed governors to take control under extreme circumstances; Governor Aksel Svane was transferred to the United States to lead the commission to supply Greenland. The Danish Sirius Patrol guarded the northeastern shores of Greenland in 1942 using dog sleds. They detected several German weather stations and alerted American troops, who destroyed
14170-677: The territory in the Greenlandic language is Kalaallit Nunaat ' land of the Kalaallit ' . The Kalaallit are the Greenlandic Inuit who inhabit the territory's western region. In prehistoric times, Greenland was home to several successive Paleo-Inuit cultures known primarily through archaeological finds. The earliest entry of the Paleo-Inuit into Greenland is thought to have occurred about 2500 BC. From about 2500 BC to 800 BC, southern and western Greenland
14300-787: The third largest area in North America after Canada and the United States. It is between latitudes 59° and 83°N , and longitudes 11° and 74°W . Greenland is bordered by the Arctic Ocean to the north, the Greenland Sea to the east, the North Atlantic Ocean to the southeast, the Davis Strait to the southwest, Baffin Bay to the west, the Nares Strait and Lincoln Sea to the northwest. The nearest countries to Greenland are Canada, with which it shares
14430-427: The turn of the 14th century—as much as 6 to 8 °C (11 to 14 °F) lower than modern summer temperatures. The study also found that the lowest winter temperatures of the last 2,000 years occurred in the late 14th century and early 15th century. The Eastern Settlement was probably abandoned in the early to mid-15th century, during this cold period . Theories drawn from archeological excavations at Herjolfsnes in
14560-492: The uninhabited southern part of Greenland beginning in the 10th century (having previously settled Iceland ), and the 13th century saw the arrival of Inuit . In the early 17th century, Dano-Norwegian explorers reached Greenland again. When Denmark and Norway separated in 1814, Greenland was transferred to the Danish crown, and was fully integrated in the Danish state in 1953 under the Constitution of Denmark , which made
14690-721: The use of dams as a source of water power, used to provide additional power to watermills and water-raising machines. Islamic irriguation techniques including Persian Wheels would be introduced to India, and would be combined with local methods, during the Delhi Sultanate and the Mughal Empire . Furthermore, in his book, The Book of Knowledge of Ingenious Mechanical Devices , the Muslim mechanical engineer, Al-Jazari (1136–1206) described designs for 50 devices. Many of these devices were water-powered, including clocks,
14820-563: The volume of water available to them. Ethiopia , also located on the Nile, took advantage of the Cold War tensions to request assistance from the United States for their own irrigation and hydropower investments in the 1960s. While progress stalled due to the coup d'état of 1974 and following 17-year-long Ethiopian Civil War Ethiopia began construction on the Grand Ethiopian Renaissance Dam in 2011. Beyond
14950-481: The war, the Grand Coulee Dam and accompanying hydroelectric projects electrified almost all of the rural Columbia Basin , but failed to improve the lives of those living and farming there the way its boosters had promised and also damaged the river ecosystem and migrating salmon populations. In the 1940s as well, the federal government took advantage of the sheer amount of unused power and flowing water from
15080-411: The warming back to 1.5 °C (2.7 °F) above preindustrial levels or lower (such as through large-scale carbon dioxide removal ) would arrest the losses, but still cause greater ultimate sea level rise than if the threshold had never been exceeded. Further, 1.5 °C (2.7 °F) itself appears to commit the ice sheet to 1.4 m ( 4 + 1 ⁄ 2 ft) of sea level rise. The island
15210-614: The west coast was settled by Icelanders and Norwegians , through a contingent of 14 boats led by Erik the Red. They formed three settlements—the Eastern Settlement , the Western Settlement , and the Middle Settlement —on fjords near the southwestern tip of the island. They shared the island with the late Dorset culture inhabitants, who occupied the northern and western parts, and later with those of
15340-468: The winter. The United States tried to construct a subterranean network of secret nuclear missile launch sites in the Greenlandic ice cap, named Project Iceworm . According to documents declassified in 1996, this project was managed from Camp Century from 1960 to 1966 before abandonment as unworkable. The missiles were never fielded, and necessary consent from the Danish Government to do so
15470-490: The winters, in which "the old and helpless were killed and thrown over cliffs". These Norse settlements vanished during the 14th and early 15th centuries. The demise of the Western Settlement coincides with a decrease in summer and winter temperatures. A study of North Atlantic seasonal temperature variability during the Little Ice Age showed a significant decrease in maximum summer temperatures beginning about
15600-618: The world are conventional hydroelectric power stations with dams. Hydroelectricity can also be used to store energy in the form of potential energy between two reservoirs at different heights with pumped-storage . Water is pumped uphill into reservoirs during periods of low demand to be released for generation when demand is high or system generation is low. Other forms of electricity generation with hydropower include tidal stream generators using energy from tidal power generated from oceans, rivers, and human-made canal systems to generating electricity. Rain has been referred to as "one of
15730-403: The world's sea level would rise by more than 7 m (23 ft). In 2003, a small island, 35 m × 15 m (115 ft × 49 ft) in length and width, was discovered by arctic explorer Dennis Schmitt and his team at the coordinates of 83-42 . Whether this island is permanent is not yet confirmed. If it is, it is the northernmost permanent known land on Earth. In 2007,
15860-739: The worst-case, "probable maximum flood" that can be expected at the site; a spillway is often included to route flood flows around the dam. A computer model of the hydraulic basin and rainfall and snowfall records are used to predict the maximum flood. Some disadvantages of hydropower have been identified. Dam failures can have catastrophic effects, including loss of life, property and pollution of land. Dams and reservoirs can have major negative impacts on river ecosystems such as preventing some animals traveling upstream, cooling and de-oxygenating of water released downstream, and loss of nutrients due to settling of particulates. River sediment builds river deltas and dams prevent them from restoring what
15990-451: Was declared the sole official language of Greenland at the historic ceremony. Tourism increased significantly between 2015 and 2019, with the number of visitors increasing from 77,000 per year to 105,000. One source estimated that in 2019 the revenue from this aspect of the economy was about 450 million kroner (US$ 67 million). Like many aspects of the economy, this slowed dramatically in 2020 and into 2021, due to restrictions required as
16120-410: Was extended to Greenlanders. Danish policies toward Greenland consisted of a strategy of cultural assimilation — or de-Greenlandification. During this period, the Danish government promoted the exclusive use of the Danish language in official matters, and required Greenlanders to go to Denmark for their post-secondary education. Many Greenlandic children grew up in boarding schools in southern Denmark, and
16250-668: Was implemented in the commercial plant of Niagara Falls in 1895 and it is still operating. In the early 20th century, English engineer William Armstrong built and operated the first private electrical power station which was located in his house in Cragside in Northumberland , England. In 1753, the French engineer Bernard Forest de Bélidor published his book, Architecture Hydraulique , which described vertical-axis and horizontal-axis hydraulic machines. The growing demand for
16380-589: Was inhabited by the Saqqaq culture . Most finds of remains from that period have been around Disko Bay , including the site of Saqqaq, for which the culture is named. From 2400 BC to 1300 BC, the Independence I culture existed in northern Greenland. It was a part of the Arctic small-tool tradition . Towns, including Deltaterrasserne , appeared. About 800 BC, the Saqqaq culture disappeared and
16510-429: Was never sought. The Danish government did not become aware of the programme's mission until 1997, when they discovered it while looking, in the declassified documents, for records related to the crash of a nuclear equipped B-52 bomber at Thule in 1968. With the 1953 Danish constitution, Greenland's colonial status ended as the island was incorporated into the Danish realm as an amt (county). Danish citizenship
16640-705: Was occupied by Nazi Germany . On 8 April 1941, the United States occupied Greenland to defend it against a possible invasion by Germany. The United States' occupation of Greenland continued until 1945. Greenland was able to buy goods from the United States and Canada by selling cryolite from the mine at Ivittuut . In World War II , the United States military used Bluie as a code name for Greenland, where they kept several bases named "Bluie (East or West) (sequential numeral)". The major air bases were Bluie West-1 at Narsarsuaq and Bluie West-8 at Søndre Strømfjord (Kangerlussuaq), both of which are still used as Greenland's major international airports. During this war,
16770-666: Was part of the very ancient Precambrian continent of Laurentia , the eastern core of which forms the Greenland Shield, while the less exposed coastal strips become a plateau. On these ice-free coastal strips are sediments formed in the Precambrian , overprinted by metamorphism and now formed by glaciers, which continue into the Cenozoic and Mesozoic in parts of the island. In the east and west of Greenland there are remnants of flood basalts and igneous intrusions, such as
16900-604: Was presented in 1950, which recommended the introduction of a modern welfare state with Denmark's development as sponsor and model. In 1953, Greenland was made an equal part of the Danish Kingdom. Home rule was granted in 1979. In 1867, United States Secretary of State William H. Seward worked with former senator Robert J. Walker to explore the possibility of buying Greenland and, perhaps, Iceland . Opposition in Congress ended this project. Following World War II,
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