46-594: The Arctic ( / ˈ ɑːr k t ɪ k / or / ˈ ɑːr t ɪ k / ) (from Greek ἄρκτος, 'bear') is a polar region located at the northernmost part of Earth. The Arctic region, from the IERS Reference Meridian travelling east, consists of parts of northern Norway ( Nordland , Troms , Finnmark , Svalbard and Jan Mayen ), northernmost Sweden ( Västerbotten , Norrbotten and Lappland ), northern Finland ( North Ostrobothnia , Kainuu and Lappi ), Russia ( Murmansk , Siberia , Nenets Okrug , Novaya Zemlya ),
92-683: A Russian flag made of rust-proof titanium alloy . The flag-placing, during Arktika 2007 , generated commentary on and concern for a race for control of the Arctic's vast hydrocarbon resources. Foreign ministers and other officials representing Canada, the Kingdom of Denmark, Norway, Russia, and the United States met in Ilulissat, Greenland on 28 May 2008 at the Arctic Ocean Conference and announced
138-502: A ring species exists and has been described around the Arctic Circle in the form of the Larus gulls. There are copious natural resources in the Arctic (oil, gas, minerals, fresh water, fish and, if the subarctic is included, forest) to which modern technology and the economic opening up of Russia have given significant new opportunities. The interest of the tourism industry is also on
184-516: A consequence of melting glaciers and other ice in Greenland, could soon contribute to a substantial rise in sea levels worldwide. The current Arctic warming is leading to ancient carbon being released from thawing permafrost , leading to methane and carbon dioxide production by micro-organisms. Release of methane and carbon dioxide stored in permafrost could cause abrupt and severe global warming, as they are potent greenhouse gases . Climate change
230-461: A larger area, being less concentrated, and also travels a longer distance through the Earth's atmosphere in which it may be absorbed, scattered or reflected, which is the same thing that causes winters to be colder than the rest of the year except in tropical regions. The axial tilt of the Earth has the most effect on climate of the polar regions due to its latitude. However, since the polar regions are
276-540: A number of definitions of what area is contained within the Arctic. The area can be defined as north of the Arctic Circle (about 66° 34'N), the approximate southern limit of the midnight sun and the polar night . Another definition of the Arctic, which is popular with ecologists , is the region in the Northern Hemisphere where the average temperature for the warmest month (July) is below 10 °C (50 °F);
322-512: Is a large variance in predictions of Arctic sea ice loss, with models showing near-complete to complete loss in September from 2035 to some time around 2067. Arctic life is characterized by adaptation to short growing seasons with long periods of sunlight, and cold, dark, snow-covered winter conditions. Arctic vegetation is composed of plants such as dwarf shrubs , graminoids , herbs , lichens , and mosses , which all grow relatively close to
368-511: Is a unique area among Earth's ecosystems. The cultures in the region and the Arctic indigenous peoples have adapted to its cold and extreme conditions. Life in the Arctic includes zooplankton and phytoplankton , fish and marine mammals , birds, land animals, plants and human societies. Arctic land is bordered by the subarctic . The word Arctic comes from the Greek word ἀρκτικός ( arktikos ), "near
414-651: Is also claiming a large swath of seabed along the Lomonosov Ridge but, unlike Denmark, confined its claim to its side of the Arctic region. In August 2015, Russia made a supplementary submission for the expansion of the external borders of its continental shelf in the Arctic Ocean , asserting that the eastern part of the Lomonosov Ridge and the Mendeleyev Ridge are an extension of the Eurasian continent. In August 2016,
460-476: Is also predicted to have a large impact on tundra vegetation, causing an increase of shrubs, and having a negative impact on bryophytes and lichens. Apart from concerns regarding the detrimental effects of warming in the Arctic, some potential opportunities have gained attention. The melting of the ice is making the Northwest Passage , shipping routes through the northernmost latitudes, more navigable, raising
506-403: Is linked to polar amplification. The Arctic region is especially vulnerable to the effects of any climate change , as has become apparent with the reduction of sea ice in recent years. Climate models predict much greater climate change in the Arctic than the global average, resulting in significant international attention to the region. In particular, there are concerns that Arctic shrinkage,
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#1732859383087552-705: Is subject to some regulatory control through the International Code for Ships Operating in Polar Waters , adopted by the International Maritime Organization on 1 January 2017 and applies to all ships in Arctic waters over 500 tonnes. Research in the Arctic has long been a collaborative international effort, evidenced by the International Polar Year . The International Arctic Science Committee , hundreds of scientists and specialists of
598-536: Is the largest research station in Antarctica , run by the United States. Other notable stations include Palmer Station and Amundsen–Scott South Pole Station (United States), Esperanza Base and Marambio Base ( Argentina ), Scott Base ( New Zealand ), and Vostok Station (Russia). While there are no indigenous human cultures, there is a complex ecosystem, especially along Antarctica's coastal zones. Coastal upwelling provides abundant nutrients that feed krill ,
644-590: The Muttaburrasaurus of Australia. However, others claim that dinosaurs lived year-round at very high latitudes, such as near the Colville River , which is now at about 70° N but at the time (70 million years ago) was 10° further north. The earliest inhabitants of North America's central and eastern Arctic are referred to as the Arctic small tool tradition (AST) and existed c. 2500 BCE . AST consisted of several Paleo-Eskimo cultures, including
690-667: The Arctic Council , and the Barents Euro-Arctic Council are more examples of collaborative international Arctic research. While there are several ongoing territorial claims in the Arctic , no country owns the geographic North Pole or the region of the Arctic Ocean surrounding it. The surrounding six Arctic states that border the Arctic Ocean—Canada, Kingdom of Denmark (with Greenland), Iceland, Norway, Russia, and
736-667: The Arctic poppy ). Herbivores on the tundra include the Arctic hare , lemming , muskox , and reindeer (caribou). They are preyed on by the snowy owl , Arctic fox , grizzly bear , and Arctic wolf . The polar bear is also a predator, though it prefers to hunt for marine life from the ice. There are also many birds and marine species endemic to the colder regions. Other terrestrial animals include wolverines , moose , Dall sheep , ermines , and Arctic ground squirrels . Marine mammals include seals , walruses , and several species of cetacean — baleen whales and also narwhals , orcas , and belugas . An excellent and famous example of
782-600: The Ilulissat Declaration , blocking any "new comprehensive international legal regime to govern the Arctic Ocean," and pledging "the orderly settlement of any possible overlapping claims." As of 2012, the Kingdom of Denmark is claiming the continental shelf based on the Lomonosov Ridge between Greenland and over the North Pole to the northern limit of the exclusive economic zone of Russia . The Russian Federation
828-600: The Independence cultures and Pre-Dorset culture. The Dorset culture ( Inuktitut : Tuniit or Tunit ) refers to the next inhabitants of central and eastern Arctic. The Dorset culture evolved because of technological and economic changes during the period of 1050–550 BCE. With the exception of the Quebec / Labrador peninsula, the Dorset culture vanished around 1500 CE. Supported by genetic testing , evidence shows that descendants of
874-822: The UN Commission on the Limits of the Continental Shelf began to consider Russia's submission. Canada claims the Northwest Passage as part of its internal waters belonging to Canada, while the United States and most maritime nations regards it as an international strait , which means that foreign vessels have right of transit passage. Since 1937, the larger portion of the Asian-side Arctic region has been extensively explored by Soviet and Russian crewed drifting ice stations . Between 1937 and 1991, 88 international polar crews established and occupied scientific settlements on
920-616: The United States ( Alaska ), Canada ( Yukon , the Northwest Territories and Nunavut ), Denmark ( Greenland ), Norway , Finland , Sweden , Iceland , and Russia . Arctic circumpolar populations, though small, often share more in common with each other than with other populations within their national boundaries. As such, the northern polar region is diverse in human settlements and cultures. The southern polar region has no permanent human habitation as of now. McMurdo Station
966-429: The drift ice and were carried thousands of kilometres by the ice flow. The Arctic is comparatively clean, although there are certain ecologically difficult localized pollution problems that present a serious threat to people's health living around these pollution sources. Due to the prevailing worldwide sea and air currents, the Arctic area is the fallout region for long-range transport pollutants , and in some places
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#17328593830871012-420: The permafrost thaws. The melting of Greenland's ice sheet is linked to polar amplification . Due to the poleward migration of the planet's isotherms (about 56 km (35 mi) per decade during the past 30 years as a consequence of global warming), the Arctic region (as defined by tree line and temperature) is currently shrinking. Perhaps the most alarming result of this is Arctic sea ice shrinkage. There
1058-453: The Arctic include rising temperatures, loss of sea ice , and melting of the Greenland ice sheet . Potential methane release from the region, especially through the thawing of permafrost and methane clathrates , is also a concern. Because of the amplified response of the Arctic to global warming, it is often seen as a leading indicator of global warming. The melting of Greenland's ice sheet
1104-563: The Arctic, similar to the Antarctic Treaty System . The initial focus of the campaign will be a UN resolution creating a global sanctuary around the pole, and a ban on oil drilling and unsustainable fishing in the Arctic. The Arctic has climate change rates that are amongst the highest in the world. Due to the major impacts to the region from climate change the near climate future of the region will be extremely different under all scenarios of warming. The effects of climate change in
1150-466: The Bear, northern" and from the word ἄρκτος ( arktos ), meaning bear. The name refers either to the constellation known as Ursa Major , the "Great Bear", which is prominent in the northern portion of the celestial sphere , or to the constellation Ursa Minor , the "Little Bear", which contains the celestial north pole (currently very near Polaris , the current north Pole Star, or North Star). There are
1196-590: The Dorset culture, known as the Sadlermiut , survived in Aivilik, Southampton and Coats Islands , until the beginning of the 20th century. The Dorset / Thule culture transition dates around the ninth–10th centuries CE. Scientists theorize that there may have been cross-contact of the two cultures with sharing of technology, such as fashioning harpoon heads, or the Thule may have found Dorset remnants and adapted their ways with
1242-516: The Dorset people in "an example of prehistoric genocide." By 1300 CE, the Inuit , present-day Arctic inhabitants and descendants of Thule culture, had settled in west Greenland, and moved into east Greenland over the following century ( Inughuit , Kalaallit and Tunumiit are modern Greenlandic Inuit groups descended from Thule). Over time, the Inuit have migrated throughout the Arctic regions of Eastern Russia,
1288-521: The North , and Saami Council ). The council operates on consensus basis, mostly dealing with environmental treaties and not addressing boundary or resource disputes. Though Arctic policy priorities differ , every Arctic nation is concerned about sovereignty/defense, resource development, shipping routes, and environmental protection. Much work remains on regulatory agreements regarding shipping, tourism, and resource development in Arctic waters. Arctic shipping
1334-422: The United States ( Alaska ), Canada ( Yukon , Northwest Territories , Nunavut ), Danish Realm ( Greenland ), and northern Iceland ( Grímsey and Kolbeinsey ), along with the Arctic Ocean and adjacent seas. Land within the Arctic region has seasonally varying snow and ice cover, with predominantly treeless permafrost under the tundra . Arctic seas contain seasonal sea ice in many places. The Arctic region
1380-743: The United States, Canada, and Greenland. Other Circumpolar North indigenous peoples include the Chukchi , Evenks , Iñupiat , Khanty , Koryaks , Nenets , Sámi , Yukaghir , Gwichʼin , and Yupik . The eight Arctic nations (Canada, Kingdom of Denmark [Greenland & The Faroe Islands], Finland, Iceland, Norway, Sweden, Russia, and US) are all members of the Arctic Council , as are organizations representing six indigenous populations (The Aleut International Association , Arctic Athabaskan Council , Gwich'in Council International , Inuit Circumpolar Council , Russian Association of Indigenous Peoples of
1426-660: The United States—are limited to a 200 nautical miles (370 km; 230 mi) exclusive economic zone (EEZ) off their coasts. Two Arctic states (Finland and Sweden) do not have direct access to the Arctic Ocean. Upon ratification of the United Nations Convention on the Law of the Sea , a country has ten years to make claims to an extended continental shelf beyond its 200 nautical mile zone. Due to this, Norway (which ratified
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1472-448: The coldest recorded temperature is approximately −68 °C (−90 °F). Coastal Arctic climates are moderated by oceanic influences, having generally warmer temperatures and heavier snowfalls than the colder and drier interior areas. The Arctic is affected by current global warming , leading to climate change in the Arctic , including Arctic sea ice decline , diminished ice in the Greenland ice sheet , and Arctic methane emissions as
1518-562: The concentrations exceed the levels of densely populated urban areas. An example of this is the phenomenon of Arctic haze , which is commonly blamed on long-range pollutants. Another example is with the bioaccumulation of PCB's ( polychlorinated biphenyls ) in Arctic wildlife and people. There have been many proposals to preserve the Arctic over the years. Most recently a group of stars at the United Nations Conference on Sustainable Development , on 21 June 2012, proposed protecting
1564-504: The continent of Antarctica. The 1959 Antarctic Treaty uses the former definition. The two polar regions are distinguished from the other two climatic and biometric belts of Earth, a tropics belt near the equator, and two middle latitude regions located between the tropics and polar regions . Polar regions receive less intense solar radiation than the other parts of Earth because the Sun's energy arrives at an oblique angle , spreading over
1610-409: The convention in 1996), Russia (ratified in 1997), Canada (ratified in 2003) and the Kingdom of Denmark (ratified in 2004) launched projects to establish claims that certain sectors of the Arctic seabed should belong to their territories. On 2 August 2007, two Russian bathyscaphes , MIR-1 and MIR-2 , for the first time in history descended to the Arctic seabed beneath the North Pole and placed there
1656-462: The farthest from the equator , they receive the weakest solar radiation and are therefore generally frigid year round due to the earth's axial tilt of 23.5° not being enough to create a high maximum midday declination to sufficiently compensate the Sun's rays for the high latitude even in summer, except for relatively brief periods in peripheral areas near the polar circles. The large amount of ice and snow also reflects and weakens of what weak sunlight
1702-429: The ground, forming tundra . An example of a dwarf shrub is the bearberry . As one moves northward, the amount of warmth available for plant growth decreases considerably. In the northernmost areas, plants are at their metabolic limits, and small differences in the total amount of summer warmth make large differences in the amount of energy available for maintenance, growth and reproduction. Colder summer temperatures cause
1748-424: The increase. The Arctic contains some of the last and most extensive continuous wilderness areas in the world, and its significance in preserving biodiversity and genotypes is considerable. The increasing presence of humans fragments vital habitats. The Arctic is particularly susceptible to the abrasion of groundcover and to the disturbance of the rare breeding grounds of the animals that are characteristic to
1794-542: The north, and by the Antarctic ice sheet on the continent of Antarctica and the Southern Ocean in the south. The Arctic has various definitions, including the region north of the Arctic Circle (currently Epoch 2010 at 66°33'44" N), or just the region north of 60° north latitude, or the region from the North Pole south to the timberline . The Antarctic is usually defined simply as south of 60° south latitude, or
1840-462: The northernmost tree line roughly follows the isotherm at the boundary of this region. The climate of the Arctic region is characterized by cold winters and cool summers. Its precipitation mostly comes in the form of snow and is low, with most of the area receiving less than 50 cm (20 in). High winds often stir up snow, creating the illusion of continuous snowfall. Average winter temperatures can go as low as −40 °C (−40 °F), and
1886-479: The polar regions receive further, contributing to the cold. Polar regions are characterized by extremely cold temperatures, heavy glaciation wherever there is sufficient precipitation to form permanent ice , short and still cold summers, and extreme variations in daylight hours, with twenty-four hours of daylight in summer, and complete darkness at mid-winter . There are many settlements in Earth's north polar region. Countries with claims to Arctic regions are:
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1932-652: The possibility that the Arctic region will become a prime trade route . One harbinger of the opening navigability of the Arctic took place in the summer of 2016 when the Crystal Serenity successfully navigated the Northwest Passage, a first for a large cruise ship. In addition, it is believed that the Arctic seabed may contain substantial oil fields which may become accessible if the ice covering them melts. These factors have led to recent international debates as to which nations can claim sovereignty or ownership over
1978-508: The predecessor culture. The evidence suggested that Inuit descend from the Birnirk of Siberia, who through the Thule culture expanded into northern Canada and Greenland, where they genetically and culturally completely replaced the Indigenous Dorset people some time after 1300 CE. The question of why the Dorset disappeared so completely has led some to suggest that Thule invaders wiped out
2024-656: The region. The Arctic also holds 1/5 of the Earth's water supply. During the Cretaceous time period , the Arctic still had seasonal snows, though only a light dusting and not enough to permanently hinder plant growth. Animals such as the Chasmosaurus , Hypacrosaurus , Troodon , and Edmontosaurus may have all migrated north to take advantage of the summer growing season, and migrated south to warmer climes when winter came. A similar situation may also have been found amongst dinosaurs that lived in Antarctic regions, such as
2070-432: The size, abundance, productivity and variety of plants to decrease. Trees cannot grow in the Arctic, but in its warmest parts, shrubs are common and can reach 2 m (6 ft 7 in) in height; sedges , mosses and lichens can form thick layers. In the coldest parts of the Arctic, much of the ground is bare; non-vascular plants such as lichens and mosses predominate, along with a few scattered grasses and forbs (like
2116-452: The waters of the Arctic. Polar regions of Earth The polar regions , also called the frigid zones or polar zones , of Earth are Earth's polar ice caps , the regions of the planet that surround its geographical poles (the North and South Poles ), lying within the polar circles . These high latitudes are dominated by floating sea ice covering much of the Arctic Ocean in
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