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95-418: The area is also culturally diverse, with four language groups ( Slavic , Mongolic , Sinitic and Turkic , formerly Samoyedic and Yeniseian as well) and more than 20 indigenous ethnic groups practicing traditional land use systems. There are also a variety of religions including Christianity , Islam , Buddhism , Tengrism and Shamanism . The region covers more than one million square kilometers, and has

190-485: A sentence clause , although subject–verb–object and adjective-before-noun is the preferred order in the neutral style of speech . Modern Bulgarian differs from other Slavic languages, because it almost completely lost declension , it developed definite articles from demonstrative pronouns (similar to "the" from "this" in English ), and it formed indicative and renarrative tenses for verbs . Since

285-482: A geographer at the Russian Academy of Sciences (see also WWF ), For many centuries, the region has been at the crossroads of European and Asian civilizations, and thus is home to great historical treasures. The ancient history of the region is so unique that many historians and archaeologists call it “the cradle of civilization”. The ancient historic monuments are integrated into the natural landscape in such

380-747: A number of continental shelves , including the Canadian Arctic shelf, underlying the Canadian Arctic Archipelago , and the Russian continental shelf , which is sometimes called the "Arctic Shelf" because it is larger. The Russian continental shelf consists of three separate, smaller shelves: the Barents Shelf, Chukchi Sea Shelf and Siberian Shelf . Of these three, the Siberian Shelf is the largest such shelf in

475-699: A part of interdisciplinary study of Slavic ethnogenesis, a lexicostatistical classification of Slavic languages. It was built using qualitative 110-word Swadesh lists that were compiled according to the standards of the Global Lexicostatistical Database project and processed using modern phylogenetic algorithms. The resulting dated tree complies with the traditional expert views on the Slavic group structure. Kassian-Dybo's tree suggests that Proto-Slavic first diverged into three branches: Eastern, Western and Southern. The Proto-Slavic break-up

570-657: A population of between 5 and 6 million inhabitants. The Altai-Sayan ecoregions contain and share a name with the Altai Mountains and the Sayan Mountains . The Altai Mountains are a mountain range in East-Central Asia, where Russia , China , Mongolia and Kazakhstan come together, and are where the rivers Irtysh and Ob have their headwaters. The Sayan Mountains lie between northwestern Mongolia and southern Siberia . The Altai-Sayan has

665-553: A recent past. Pontic Steppe Caucasus East Asia Eastern Europe Northern Europe Pontic Steppe Northern/Eastern Steppe Europe South Asia Steppe Europe Caucasus India Indo-Aryans Iranians East Asia Europe East Asia Europe Indo-Aryan Iranian Indo-Aryan Iranian Others European Slavic languages descend from Proto-Slavic , their immediate parent language , ultimately deriving from Proto-Indo-European ,

760-636: A total area of 1,065,000 square kilometers. Its area belongs to the territory of Russia (62%), Mongolia (29%), Kazakhstan (5%) and China (4%). Part or all of the Russian oblasts of Kemerovo , Novosibirsk , and Irkutsk ; the Krais of Altai and Krasnoyarsk ; and the Autonomous Republics of Altai , Khakassia , Tuva , and Buryatia lie within the Altai-Sayan, as do parts of

855-533: A trans-boundary nature reserve and launch joint biodiversity conservation programs. That same year, several republics in the Russian Federation ( Tyva , Khakassia and Altai ) also signed an environmental protection agreement. Five years later, in March 2003, organizations representing state governments of Altai Region (Russia), Bayan-Ulgii Aimag (Mongolia), Eastern Kazakhstan Region (Kazakhstan),

950-655: A way that it forms a harmonious and inseparable unity. Thousands of petroglyphs , cave paintings , antique burial mounds , menhirs, steles , tumuli and other ancient monuments are found in the area, some even as ancient as the Egyptian pyramids . Altai-Sayan is home to the Denisova cave , famous for the 2010 discovery of 50,000-year-old fossils of a new kind of human, the Denisovans . Since then, Neanderthal bones, and tools crafted by Homo sapiens have been found in

1045-716: Is Molloy Hole in the Fram Strait , at about 5,550 m (18,210 ft). The two major basins are further subdivided by ridges into the Canada Basin (between Beaufort Shelf of North America and the Alpha Ridge ), Makarov Basin (between the Alpha and Lomonosov Ridges), Amundsen Basin (between Lomonosov and Gakkel ridges), and Nansen Basin (between the Gakkel Ridge and the continental shelf that includes

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1140-414: Is a section referred to as the sub-surface layer. It is a product of Atlantic water that enters through canyons and is subjected to intense mixing on the Siberian Shelf. As it is entrained, it cools and acts a heat shield for the surface layer on account of weak mixing between layers. However, over the past couple of decades a combination of the warming and the shoaling of Atlantic water are leading to

1235-791: Is also seen as the northernmost part of the all-encompassing world ocean . The Arctic Ocean includes the North Pole region in the middle of the Northern Hemisphere and extends south to about 60°N . The Arctic Ocean is surrounded by Eurasia and North America, and the borders follow topographic features: the Bering Strait on the Pacific side and the Greenland Scotland Ridge on the Atlantic side. It

1330-590: Is better for geographically adjacent languages and in the written (rather than oral) form. At the same time, recent studies of mutual intelligibility between Slavic languages revealed, that their traditional three-branch division does not withstand quantitative scrutiny. While the grouping of Czech , Slovak and Polish into West Slavic turned out to be appropriate, Western South Slavic Serbo-Croatian and Slovene were found to be closer to Czech and Slovak (West Slavic languages) than to Eastern South Slavic Bulgarian . The traditional tripartite division of

1425-477: Is cloudy year-round, with mean cloud cover ranging from 60% in winter to over 80% in summer. The temperature of the surface water of the Arctic Ocean is fairly constant at approximately −1.8 °C (28.8 °F), near the freezing point of seawater . The density of sea water, in contrast to fresh water, increases as it nears the freezing point and thus it tends to sink. It is generally necessary that

1520-509: Is contained in a polar climate characterized by persistent cold and relatively narrow annual temperature ranges. Winters are characterized by the polar night , extreme cold, frequent low-level temperature inversions, and stable weather conditions. Cyclones are only common on the Atlantic side. Summers are characterized by continuous daylight ( midnight sun ), and air temperatures can rise slightly above 0 °C (32 °F). Cyclones are more frequent in summer and may bring rain or snow. It

1615-451: Is dated to around 100 A.D., which correlates with the archaeological assessment of Slavic population in the early 1st millennium A.D. being spread on a large territory and already not being monolithic. Then, in the 5th and 6th centuries A.D., these three Slavic branches almost simultaneously divided into sub-branches, which corresponds to the fast spread of the Slavs through Eastern Europe and

1710-451: Is mostly covered by sea ice throughout the year and almost completely in winter . The Arctic Ocean's surface temperature and salinity vary seasonally as the ice cover melts and freezes; its salinity is the lowest on average of the five major oceans, due to low evaporation , heavy fresh water inflow from rivers and streams, and limited connection and outflow to surrounding oceanic waters with higher salinities. The summer shrinking of

1805-677: Is predominantly cyclonic on the Eurasian side and anticyclonic in the Canadian Basin . Water enters from both the Pacific and Atlantic Oceans and can be divided into three unique water masses. The deepest water mass is called Arctic Bottom Water and begins around 900 m (3,000 ft) depth. It is composed of the densest water in the World Ocean and has two main sources: Arctic shelf water and Greenland Sea Deep Water. Water in

1900-495: Is the highest volumetric inflow to the Arctic Ocean, equalling about 10 times that of the Pacific inflow, and it creates the Arctic Ocean Boundary Current. It flows slowly, at about 0.02 m/s. Atlantic Water has the same salinity as Arctic Bottom Water but is much warmer (up to 3 °C [37 °F]). In fact, this water mass is actually warmer than the surface water and remains submerged only due to

1995-541: Is the northernmost habitat of the snow leopard . a species listed on the IUCN Red List of Threatened Species as globally vulnerable. The Altai-Sayan region, or phenomena associated with it, have been the focus of various types of science and scholarship in diverse fields: Slavic languages The Slavic languages , also known as the Slavonic languages , are Indo-European languages spoken primarily by

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2090-559: Is the smallest and shallowest of the world's five oceanic divisions . It spans an area of approximately 14,060,000 km (5,430,000 sq mi) and is the coldest of the world's oceans. The International Hydrographic Organization (IHO) recognizes it as an ocean, although some oceanographers call it the Arctic Mediterranean Sea . It has also been described as an estuary of the Atlantic Ocean . It

2185-444: Is within the boundaries of modern Ukraine and Southern Federal District of Russia. The Proto-Slavic language existed until around AD 500. By the 7th century, it had broken apart into large dialectal zones. There are no reliable hypotheses about the nature of the subsequent breakups of West and South Slavic. East Slavic is generally thought to converge to one Old East Slavic language of Kievan Rus , which existed until at least

2280-682: The Balkans , Central and Eastern Europe , and all the way from Western Siberia to the Russian Far East . Furthermore, the diasporas of many Slavic peoples have established isolated minorities of speakers of their languages all over the world. The number of speakers of all Slavic languages together was estimated to be 315 million at the turn of the twenty-first century. It is the largest and most diverse ethno-linguistic group in Europe. The Slavic languages are conventionally (that is, also on

2375-608: The Cretaceous period, the Canadian Basin opened, and tectonic activity due to the assembly of Alaska caused hydrocarbons to migrate toward what is now Prudhoe Bay. At the same time, sediments shed off the rising Canadian Rockies built out the large Mackenzie Delta. The rifting apart of the supercontinent Pangea , beginning in the Triassic period, opened the early Atlantic Ocean. Rifting then extended northward, opening

2470-614: The Eurasian Basin , which is 4,000–4,500 m (13,100–14,800 ft) deep, and the Amerasian Basin (sometimes called the North American or Hyperborean Basin), which is about 4,000 m (13,000 ft) deep. The bathymetry of the ocean bottom is marked by fault block ridges, abyssal plains , ocean deeps , and basins. The average depth of the Arctic Ocean is 1,038 m (3,406 ft). The deepest point

2565-655: The Franz Josef Land ). The crystalline basement rocks of mountains around the Arctic Ocean were recrystallized or formed during the Ellesmerian orogeny, the regional phase of the larger Caledonian orogeny in the Paleozoic Era. Regional subsidence in the Jurassic and Triassic periods led to significant sediment deposition, creating many of the reservoirs for current day oil and gas deposits. During

2660-894: The Ili Kazakh Autonomous Prefecture of China's Xinjiang Uyghur Autonomous Region , East Kazakhstan province of Kazakhstan, and the Mongolian Aimags of Govi-Altai , Khovd , Bayan-Ölgii , Uvs , Zavkhan , and Khövsgöl . At the far north of the Altai-Sayan region, near its boundary, is the Russian city of Krasnoyarsk (population above 900,000 in 2010 census). Other towns in the region include Kyzyl in Russia (pop. about 110,000 in 2008), as well as Ulaangom , Ulgii , and Khovd , all in Mongolia (each with population under 30,000). The Russian town of Gorno-Altaysk (pop. about 60,000 in 2010) lies within

2755-584: The Independence I and Independence II cultures of northeastern Canada and Greenland ( c.  2400–1800 BC and c.  800–1 BC ); and the Groswater of Labrador and Nunavik . The Dorset culture spread across Arctic North America between 500 BC and AD 1500. The Dorset were the last major Paleo-Eskimo culture in the Arctic before the migration east from present-day Alaska of

2850-599: The Latin script , and have had more Western European influence due to their proximity and speakers being historically Roman Catholic , whereas the East Slavic and Eastern South Slavic languages are written in Cyrillic and, with Eastern Orthodox or Uniate faith, have had more Greek influence. Two Slavic languages, Belarusian and Serbo-Croatian , are biscriptal, i.e. written in either alphabet either nowadays or in

2945-670: The Northwest Passage , to " Cathay " ( China ) caused water to win out, and by 1723 mapmakers such as Johann Homann featured an extensive "Oceanus Septentrionalis" at the northern edge of their charts. The few expeditions to penetrate much beyond the Arctic Circle in that era added only small islands, such as Novaya Zemlya (11th century) and Spitzbergen (1596), though, since these were often surrounded by pack-ice , their northern limits were not so clear. The makers of navigational charts , more conservative than some of

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3040-597: The Rusyn language spoken in Transcarpatian Ukraine and adjacent counties of Slovakia and Ukraine. Similarly, the Croatian Kajkavian dialect is more similar to Slovene than to the standard Croatian language. Modern Russian differs from other Slavic languages in an unusually high percentage of words of non-Slavic origin, particularly of Dutch (e.g. for naval terms introduced during

3135-681: The Slavic peoples and their descendants. They are thought to descend from a proto-language called Proto-Slavic , spoken during the Early Middle Ages , which in turn is thought to have descended from the earlier Proto-Balto-Slavic language , linking the Slavic languages to the Baltic languages in a Balto-Slavic group within the Indo-European family. The current geographical distribution of natively spoken Slavic languages includes

3230-643: The Thule people , ancestors of the modern Inuit . The Thule Tradition lasted from about 200 BC to AD 1600, arising around the Bering Strait and later encompassing almost the entire Arctic region of North America. The Thule people were the ancestors of the Inuit, who now live in Alaska, Northwest Territories , Nunavut , Nunavik (northern Quebec), Labrador and Greenland. For much of European history ,

3325-772: The saline lakes Uvs Nuur , Khyargas Nuur and Dörgön Nuur ; and freshwater lake Khar-Us Nuur , Khar Nuur and Airag Nuur . These are remnants of the West Siberian Glacial Lake , a periglacial lake formed when the Arctic Ocean outlets for each of the Ob and Yenisei rivers were blocked by the Barents-Kara Ice Sheet during the Weichselian Glaciation , approximately 80,000 years ago. According to Anatoliy Mandych,

3420-404: The suffix "-el" denotes past tense of masculine gender . The equivalent phrase for a feminine subject is "vyshla". The gender conjugation of verbs , as in the preceding example, is another feature of some Slavic languages rarely found in other language groups. The well-developed fusional grammar allows Slavic languages to have a somewhat unusual feature of virtually free word order in

3515-587: The 12th century. Linguistic differentiation was accelerated by the dispersion of the Slavic peoples over a large territory, which in Central Europe exceeded the current extent of Slavic-speaking majorities. Written documents of the 9th, 10th, and 11th centuries already display some local linguistic features. For example, the Freising manuscripts show a language that contains some phonetic and lexical elements peculiar to Slovene dialects (e.g. rhotacism ,

3610-521: The 14th or 15th century, major language differences were not between the regions occupied by modern Belarus, Russia and Ukraine, but rather between the north-west (around modern Velikiy Novgorod and Pskov) and the center (around modern Kyiv , Suzdal , Rostov , Moscow as well as Belarus) of the East Slavic territories. The Old Novgorodian dialect of that time differed from the central East Slavic dialects as well as from all other Slavic languages much more than in later centuries. According to Zaliznyak,

3705-604: The Americas are partially derived from southern Altaians. According to the New Scientist , the mix of mammals in the Altai-Sayan region has been among the least changed since the last ice age , in comparison to the mammalian population of any other region on earth. Its stability over time suggests that it may have acted as a refugium for mammoth steppe fauna both during and between ice ages. There are three major UNESCO World Culture and Natural Heritage Sites in

3800-677: The Arctic Ocean as mafic oceanic crust material erupted out of a branch of Mid-Atlantic Ridge. The Amerasia Basin may have opened first, with the Chukchi Borderland moved along to the northeast by transform faults. Additional spreading helped to create the "triple-junction" of the Alpha-Mendeleev Ridge in the Late Cretaceous epoch . Throughout the Cenozoic Era, the subduction of the Pacific plate,

3895-617: The Arctic Ocean has a uniquely complex system of water flow. It resembles some hydrological features of the Mediterranean Sea , referring to its deep waters having only limited communication through the Fram Strait with the Atlantic Basin , "where the circulation is dominated by thermohaline forcing". The Arctic Ocean has a total volume of 18.07 × 10 km , equal to about 1.3% of the World Ocean. Mean surface circulation

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3990-529: The Arctic Ocean. Much of the Arctic ice pack is also covered in snow for about 10 months of the year. The maximum snow cover is in March or April—about 20–50 cm (7.9–19.7 in) over the frozen ocean. The climate of the Arctic region has varied significantly during the Earth's history. During the Paleocene–Eocene Thermal Maximum 55 million years ago, when the global climate underwent

4085-653: The Arctic Ocean: Different authorities put various marginal seas in either the Arctic Ocean or the Atlantic Ocean, including: Hudson Bay , Baffin Bay , the Norwegian Sea , and Hudson Strait . The main islands and archipelagos in the Arctic Ocean are, from the prime meridian west: There are several ports and harbours on the Arctic Ocean. The ocean's Arctic shelf comprises

4180-408: The Balkans during the second half of the 1st millennium A.D. (the so-called Slavicization of Europe). The Slovenian language was excluded from the analysis, as both Ljubljana koine and Literary Slovenian show mixed lexical features of Southern and Western Slavic languages (which could possibly indicate the Western Slavic origin of Slovenian, which for a long time was being influenced on the part of

4275-408: The Canadian Archipelago. As noted, the process of ice formation and movement is a key driver in Arctic Ocean circulation and the formation of water masses. With this dependence, the Arctic Ocean experiences variations due to seasonal changes in sea ice cover. Sea ice movement is the result of wind forcing, which is related to a number of meteorological conditions that the Arctic experiences throughout

4370-408: The European region of the Arctic Ocean was heavily contested : the Allied commitment to resupply the Soviet Union via its northern ports was opposed by German naval and air forces. Since 1954 commercial airlines have flown over the Arctic Ocean (see Polar route ). The Arctic Ocean occupies a roughly circular basin and covers an area of about 14,056,000 km (5,427,000 sq mi), almost

4465-410: The Fram Strait is what allows for both inflow and outflow on the Atlantic side of the Arctic Ocean. Because of this, it is influenced by the Coriolis force , which concentrates outflow to the East Greenland Current on the western side and inflow to the Norwegian Current on the eastern side. Pacific water also exits along the west coast of Greenland and the Hudson Strait (1–2 Sv), providing nutrients to

4560-419: The Lomonosov Ridge, which appears to be continental crust separated from the Barents-Kara Shelf in the Paleocene and then starved of sediment. It may contain up to 10 billion barrels of oil. The Gakkel Ridge rift is also poorly understand and may extend into the Laptev Sea. In large parts of the Arctic Ocean, the top layer (about 50 m [160 ft]) is of lower salinity and lower temperature than

4655-444: The North American polar region goes back at least 17,000–50,000 years, during the Wisconsin glaciation . At this time, falling sea levels allowed people to move across the Bering land bridge that joined Siberia to northwestern North America (Alaska), leading to the Settlement of the Americas . Early Paleo-Eskimo groups included the Pre-Dorset ( c.  3200–850 BC ); the Saqqaq culture of Greenland (2500–800 BC);

4750-422: The Republic of Altai (Russia), Xinjiang Uygur Autonomous Region (China) and Khovd Aimag (Mongolia) resolved to establish an International Steering Board called " Altai, Our Common Home " However, as of 2010, the steering organization "Altai, Our Common Home" had played a coordinating role "less in conservation and ecological themes" than in "economic and cultural exchange programmes". Analysts stated that "while

4845-525: The Russian language developed as a convergence of that dialect and the central ones, whereas Ukrainian and Belarusian were continuation of development of the central dialects of East Slavs. Also Russian linguist Sergey Nikolaev, analysing historical development of Slavic dialects' accent system, concluded that a number of other tribes in Kievan Rus came from different Slavic branches and spoke distant Slavic dialects. Arctic Ocean Main five oceans division: Further subdivision: The Arctic Ocean

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4940-536: The Slavic languages does not take into account the spoken dialects of each language. Within the individual Slavic languages, dialects may vary to a lesser degree, as those of Russian, or to a much greater degree, like those of Slovene. In certain cases so-called transitional dialects and hybrid dialects often bridge the gaps between different languages, showing similarities that do not stand out when comparing Slavic literary (i.e. standard) languages. For example, Slovak (West Slavic) and Ukrainian (East Slavic) are bridged by

5035-653: The West group), Bulgarian and Macedonian (eastern members of the South group), and Serbo-Croatian and Slovene (western members of the South group). In addition, Aleksandr Dulichenko recognizes a number of Slavic microlanguages : both isolated ethnolects and peripheral dialects of more well-established Slavic languages. All Slavic languages have fusional morphology and, with a partial exception of Bulgarian and Macedonian , they have fully developed inflection -based conjugation and declension . In their relational synthesis Slavic languages distinguish between lexical and inflectional suffixes . In all cases,

5130-428: The [ecosystem conservation] soil has been prepared for cultivation rather well", after 10 years "there are no tangible results yet". They expressed concern that At the 'grass roots' level, managers of transboundary protected areas were not involved in the process. The leading role was played by international NGOs and funders. Overall, the general concept was not clearly formulated and developed. The Altai-Sayan region

5225-464: The ancestor language of all Indo-European languages , via a Proto-Balto-Slavic stage. During the Proto-Balto-Slavic period a number of exclusive isoglosses in phonology, morphology, lexis, and syntax developed, which makes Slavic and Baltic the closest related of all the Indo-European branches. The secession of the Balto-Slavic dialect ancestral to Proto-Slavic is estimated on archaeological and glottochronological criteria to have occurred sometime in

5320-608: The average winter value of 15,600,000 km (6,023,200 sq mi). The seasonal variations are about 7,000,000 km (2,702,700 sq mi), with the maximum in April and minimum in September. The sea ice is affected by wind and ocean currents, which can move and rotate very large areas of ice. Zones of compression also arise, where the ice piles up to form pack ice. Icebergs occasionally break away from northern Ellesmere Island , and icebergs are formed from glaciers in western Greenland and extreme northeastern Canada. Icebergs are not sea ice but may become embedded in

5415-415: The basis of extralinguistic features, such as geography) divided into three subgroups: East , South , and West , which together constitute more than 20 languages. Of these, 10 have at least one million speakers and official status as the national languages of the countries in which they are predominantly spoken: Russian , Belarusian and Ukrainian (of the East group), Polish , Czech and Slovak (of

5510-513: The biodiversity of the region, according to the Fund, include poaching and illegal wildlife trade, industrial development, climate change, overgrazing and competition for pastures, unsustainable forestry, water pollution, and poverty. Beginning in the late 1990s, several government-level initiatives were begun with the stated purpose that included helping to preserve the Altai-Sayan ecoregion and biodiversity. In 1998, representatives of Kazakhstan, China, Mongolia and Russia met in Urumqi to organize

5605-429: The cave. This makes it the only place where all three hominins have been known to live. Conditions in the Altai-Sayan are stable, so ancient humans may have taken refuge there during glacial interchanges and lived off the diverse game species. Malaya Syya in Khakassia , another ancient archeological site in the region, has been dated to 35,000 BCE . Recent genetic studies have shown that some indigenous peoples of

5700-441: The collision of India with Eurasia, and the continued opening of the North Atlantic created new hydrocarbon traps. The seafloor began spreading from the Gakkel Ridge in the Paleocene Epoch and the Eocene Epoch, causing the Lomonosov Ridge to move farther from land and subside. Because of sea ice and remote conditions, the geology of the Arctic Ocean is still poorly explored. The Arctic Coring Expedition drilling shed some light on

5795-437: The ecoregion – the Golden Mountains of Altai , consisting of the Altai and Katun Natural Reserves , Lake Teletskoye , Belukha Mountain , and the Ukok Plateau ; Lake Baikal , which forms part of the eastern border of the region, and Uvs Nuur Basin in the Great Lakes Hollow. The Great Lakes Hollow , in addition to its saline lakes, contains some of the most important wetlands of Central Asia . The wetlands are based on

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5890-437: The explorers who travelled closer and closer to the pole reported, the polar ice cap is quite thick and persists year-round. Fridtjof Nansen was the first to make a nautical crossing of the Arctic Ocean, in the Fram Expedition from 1893 to 1896. The first surface crossing of the ocean was led by Wally Herbert in 1969, in a dog sled expedition from Alaska to Svalbard , with air support. The first nautical transit of

5985-571: The following sub-branches: Some linguists speculate that a North Slavic branch has existed as well. The Old Novgorod dialect may have reflected some idiosyncrasies of this group. Although the Slavic languages diverged from a common proto-language later than any other groups of the Indo-European language family , enough differences exist between the any two geographically distant Slavic languages to make spoken communication between such speakers cumbersome. As usually found within other language groups , mutual intelligibility between Slavic languages

6080-440: The formation of Atlantic Deep Water. The overturning of this water plays a key role in global circulation and the moderation of climate. In the depth range of 150–900 m (490–2,950 ft) is a water mass referred to as Atlantic Water. Inflow from the North Atlantic Current enters through the Fram Strait, cooling and sinking to form the deepest layer of the halocline, where it circles the Arctic Basin counter-clockwise. This

6175-401: The geographical separation between these two groups, also severing the connection between Slavs in Moravia and Lower Austria ( Moravians ) and those in present-day Styria , Carinthia , East Tyrol in Austria , and in the provinces of modern Slovenia , where the ancestors of the Slovenes settled during first colonization. In September 2015, Alexei Kassian and Anna Dybo published, as

6270-456: The ice has been quoted at 50%. The US National Snow and Ice Data Center (NSIDC) uses satellite data to provide a daily record of Arctic sea ice cover and the rate of melting compared to an average period and specific past years, showing a continuous decline in sea ice extent. In September 2012, the Arctic ice extent reached a new record minimum. Compared to the average extent (1979–2000), the sea ice had diminished by 49%. Human habitation in

6365-497: The increasing influence of Atlantic water heat in melting sea ice in the eastern Arctic. The most recent estimates, for 2016–2018, indicate the oceanic heat flux to the surface has now overtaken the atmospheric flux in the eastern Eurasian Basin. Over the same period the weakening halocline stratification has coincided with increasing upper ocean currents thought to be associated with declining sea ice, indicate increasing mixing in this region. In contrast direct measurements of mixing in

6460-425: The interwar period, scholars have conventionally divided Slavic languages, on the basis of geographical and genealogical principle, and with the use of the extralinguistic feature of script, into three main branches, that is, East, South, and West (from the vantage of linguistic features alone, there are only two branches of the Slavic languages, namely North and South). These three conventional branches feature some of

6555-443: The last three decades, however, make this view very hard to maintain nowadays, especially when one considers that there was most likely no " Proto-Baltic " language and that West Baltic and East Baltic differ from each other as much as each of them does from Proto-Slavic. The Proto-Slavic language originated in the area of modern Ukraine and Belarus mostly overlapping with the northern part of Indoeuropean Urheimat , which

6650-409: The lexical suffix precedes the inflectional in an agglutination mode. The fusional categorization of Slavic languages is based on grammatic inflectional suffixes alone. Prefixes are also used, particularly for lexical modification of verbs. For example, the equivalent of English "came out" in Russian is "vyshel", where the prefix "vy-" means "out" , the reduced root "-sh" means "come", and

6745-416: The more fanciful cartographers, tended to leave the region blank, with only fragments of known coastline sketched in. This lack of knowledge of what lay north of the shifting barrier of ice gave rise to a number of conjectures. In England and other European nations, the myth of an " Open Polar Sea " was persistent. John Barrow , longtime Second Secretary of the British Admiralty , promoted exploration of

6840-476: The neighboring Serbo-Croatian dialects), and the quality Swadesh lists were not yet collected for Slovenian dialects. Because of scarcity or unreliability of data, the study also did not cover the so-called Old Novgordian dialect, the Polabian language and some other Slavic lects. The above Kassian-Dybo's research did not take into account the findings by Russian linguist Andrey Zaliznyak who stated that, until

6935-497: The north polar regions remained largely unexplored and their geography conjectural. Pytheas of Massilia recorded an account of a journey northward in 325 BC, to a land he called " Eschate Thule ", where the Sun only set for three hours each day and the water was replaced by a congealed substance "on which one can neither walk nor sail". He was probably describing loose sea ice known today as " growlers " or "bergy bits"; his "Thule"

7030-400: The north pole was made in 1958 by the submarine USS Nautilus , and the first surface nautical transit occurred in 1977 by the icebreaker NS Arktika . Since 1937, Soviet and Russian manned drifting ice stations have extensively monitored the Arctic Ocean. Scientific settlements were established on the drift ice and carried thousands of kilometres by ice floes . In World War II ,

7125-578: The pack ice. Icebergs pose a hazard to ships, of which the Titanic is one of the most famous. The ocean is virtually icelocked from October to June, and the superstructure of ships are subject to icing from October to May. Before the advent of modern icebreakers, ships sailing the Arctic Ocean risked being trapped or crushed by sea ice (although the Baychimo drifted through the Arctic Ocean untended for decades despite these hazards). The Arctic Ocean

7220-554: The period 1500–1000 BCE. A minority of Baltists maintain the view that the Slavic group of languages differs so radically from the neighboring Baltic group ( Lithuanian , Latvian , and the now-extinct Old Prussian ), that they could not have shared a parent language after the breakup of the Proto-Indo-European continuum about five millennia ago. Substantial advances in Balto-Slavic accentology that occurred in

7315-590: The region from 1818 to 1845 in search of this. In the United States in the 1850s and 1860s, the explorers Elisha Kane and Isaac Israel Hayes both claimed to have seen part of this elusive body of water. Even quite late in the century, the eminent authority Matthew Fontaine Maury included a description of the Open Polar Sea in his textbook The Physical Geography of the Sea (1883). Nevertheless, as all

7410-689: The region near its western boundary, and the Russian city of Irkutsk lies just outside the region to its east. The Altai-Sayan region's total population is estimated as about 5.5 million. Contained within this ecoregion is the Great Lakes Hollow , a large semi-arid depression , bounded by the Altai in the West, Khangai in the East and Tannu-Ola Mountains in the North. This contains six major lakes:

7505-584: The region. It has identified the Altai-Sayan ecoregion as a priority region for wildlife conservation. According to the World Wildlife Fund, "The Altai-Sayan ecoregion is one of the last remaining untouched areas of the world." Furthermore: 680 species of the vertebrates are registered in the Ecoregion. Among them: 77 species of fishes, 8 species of amphibians, 25 species of reptiles, 425 species of birds and 143 species of mammals. Threats to

7600-407: The reign of Peter I ), French (for household and culinary terms during the reign of Catherine II ) and German (for medical, scientific and military terminology in the mid-1800's). Another difference between the East, South, and West Slavic branches is in the orthography of the standard languages: West Slavic languages (and Western South Slavic languages – Croatian and Slovene ) are written in

7695-520: The rest. It remains relatively stable because the salinity effect on density is bigger than the temperature effect. It is fed by the freshwater input of the big Siberian and Canadian rivers ( Ob , Yenisei , Lena , Mackenzie ), the water of which quasi floats on the saltier, denser, deeper ocean water. Between this lower salinity layer and the bulk of the ocean lies the so-called halocline , in which both salinity and temperature rise with increasing depth. Because of its relative isolation from other oceans,

7790-663: The role of salinity in density. When water reaches the basin, it is pushed by strong winds into a large circular current called the Beaufort Gyre . Water in the Beaufort Gyre is far less saline than that of the Chukchi Sea due to inflow from large Canadian and Siberian rivers. The final defined water mass in the Arctic Ocean is called Arctic Surface Water and is found in the depth range of 150–200 m (490–660 ft). The most important feature of this water mass

7885-462: The sea that sink over the continental shelf into the western Arctic Ocean and create a halocline. This water is met by Greenland Sea Deep Water, which forms during the passage of winter storms. As temperatures cool dramatically in the winter, ice forms, and intense vertical convection allows the water to become dense enough to sink below the warm saline water below. Arctic Bottom Water is critically important because of its outflow, which contributes to

7980-467: The shelf region that begins as inflow from the Pacific passes through the narrow Bering Strait at an average rate of 0.8 Sverdrups and reaches the Chukchi Sea . During the winter, cold Alaskan winds blow over the Chukchi Sea, freezing the surface water and pushing this newly formed ice out to the Pacific. The speed of the ice drift is roughly 1–4 cm/s. This process leaves dense, salty waters in

8075-411: The size of Antarctica . The coastline is 45,390 km (28,200 mi) long. It is the only ocean smaller than Russia , which has a land area of 16,377,742 km (6,323,482 sq mi). The Arctic Ocean is surrounded by the land masses of Eurasia (Russia and Norway), North America ( Canada and the U.S. state of Alaska), Greenland, and Iceland . Note: Some parts of the areas listed in

8170-478: The summer months. There is also evidence that the drift is associated with the phase of the Arctic Oscillation and Atlantic Multidecadal Oscillation . Much of the Arctic Ocean is covered by sea ice that varies in extent and thickness seasonally. The mean extent of the Arctic sea ice has been continuously decreasing in the last decades, declining at a rate of currently 12.85% per decade since 1980 from

8265-664: The summer, the SLP contrast is smaller, producing weaker winds. A final example of seasonal pressure system movement is the low pressure system that exists over the Nordic and Barents Seas. It is an extension of the Icelandic Low , which creates cyclonic ocean circulation in this area. The low shifts to centre over the North Pole in the summer. These variations in the Arctic all contribute to ice drift reaching its weakest point during

8360-620: The system of interconnected shallow lakes with wide reed belts within the steppe . As a key part of the Central Asian Flyway , the wetlands support a number of rare and endangered migrating birds: Eurasian spoonbill ( Platalea leucorodia ), black stork ( Ciconia nigra ), osprey ( Pandion haliaetus ), white-tailed eagle ( Haliaeetus albicilla ), swan goose ( Cygnopsis cygnoides ), bar-headed goose ( Anser indicus ), and white pelican Pelecanus onocrotalus . The World Wildlife Fund has conducted studies of

8455-632: The table are located in the Atlantic Ocean . Other consists of Gulfs , Straits , Channels and other parts without specific names and excludes Exclusive Economic Zones . The Arctic Ocean is connected to the Pacific Ocean by the Bering Strait and to the Atlantic Ocean through the Greenland Sea and Labrador Sea . (The Iceland Sea is sometimes considered part of the Greenland Sea, and sometimes separate.) The largest seas in

8550-475: The upper 100–150 m (330–490 ft) of ocean water cools to the freezing point for sea ice to form. In the winter, the relatively warm ocean water exerts a moderating influence, even when covered by ice. This is one reason why the Arctic does not experience the extreme temperatures seen on the Antarctic continent . There is considerable seasonal variation in how much pack ice of the Arctic ice pack covers

8645-493: The western Arctic indicate the Atlantic water heat remains isolated at intermediate depths even under the 'perfect storm' conditions of the Great Arctic Cyclone of 2012 . Waters originating in the Pacific and Atlantic both exit through the Fram Strait between Greenland and Svalbard Island, which is about 2,700 m (8,900 ft) deep and 350 km (220 mi) wide. This outflow is about 9 Sv. The width of

8740-713: The word krilatec ). The Freising manuscripts are the first Latin-script continuous text in a Slavic language. The migration of Slavic speakers into the Balkans in the declining centuries of the Byzantine Empire expanded the area of Slavic speech, but the pre-existing writing (notably Greek) survived in this area. The arrival of the Hungarians in Pannonia in the 9th century interposed non-Slavic speakers between South and West Slavs. Frankish conquests completed

8835-628: The world; it holds large oil and gas reserves. The Chukchi shelf forms the border between Russian and the United States as stated in the USSR–USA Maritime Boundary Agreement . The whole area is subject to international territorial claims . The Chukchi Plateau extends from the Chukchi Sea Shelf. An underwater ridge , the Lomonosov Ridge , divides the deep sea North Polar Basin into two oceanic basins :

8930-547: The year. For example, the Beaufort High—an extension of the Siberian High system—is a pressure system that drives the anticyclonic motion of the Beaufort Gyre. During the summer, this area of high pressure is pushed out closer to its Siberian and Canadian sides. In addition, there is a sea level pressure (SLP) ridge over Greenland that drives strong northerly winds through the Fram Strait, facilitating ice export. In

9025-674: Was probably Norway , though the Faroe Islands or Shetland have also been suggested. Early cartographers were unsure whether to draw the region around the North Pole as land (as in Johannes Ruysch 's map of 1507, or Gerardus Mercator 's map of 1595) or water (as with Martin Waldseemüller 's world map of 1507). The fervent desire of European merchants for a northern passage, the Northern Sea Route or

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