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Lake Baikal

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Coordinates: 53°30′N 108°0′E / 53.500°N 108.000°E / 53.500; 108.000
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"Baykal" redirects here. For other uses, see Baykal (disambiguation).

Lake Baikal
LocationSiberia, Russia
Coordinates53°30′N 108°0′E / 53.500°N 108.000°E / 53.500; 108.000
Lake typeContinental rift lake
Primary inflowsSelenge, Barguzin, Upper Angara
Primary outflowsAngara
Catchment area560,000 km2 (216,000 sq mi)
Basin countriesRussia and Mongolia
Max. length636 km (395 mi)
Max. width79 km (49 mi)
Surface area31,722 km2 (12,248 sq mi)[1]
Average depth744.4 m (2,442 ft)[1]
Max. depth1,642 m (5,387 ft)[1]
Water volume23,615.39 km3 (5,700 cu mi)[1]
Residence time330 years[2]
Shore length12,100 km (1,300 mi)
Surface elevation455.5 m (1,494 ft)
FrozenJanuary–May
Islands27 (Olkhon)
SettlementsIrkutsk
TypeNatural
Criteriavii, viii, ix, x
Designated1996 (22nd session)
Reference no.754
State Party Russia
RegionAsia
1 Shore length is not a well-defined measure.

Lake Baikal (Russian: о́зеро Байка́л, romanized: Ozero Baykal, IPA: [ˈozʲɪrə bɐjˈkal]; Template:Lang-bxr, Template:Lang-mn, Baygal nuur, meaning "nature lake";[3]) is a rift lake in the south of the Russian region of Siberia, between the Irkutsk Oblast to the northwest and the Buryat Republic to the southeast.

Lake Baikal is the largest (by volume) freshwater lake in the world, containing roughly 20% of the world's unfrozen surface fresh water,[4][5] and at 1,642 m (5,387 ft),[1] the deepest.[6] It is also among the clearest[7] of all lakes, and thought to be the world's oldest lake[8] at 25 million years.[9] It is the seventh-largest lake in the world by surface area. With 23,615.39 cubic kilometres (5,700 cubic miles) of fresh water,[1] it contains more water than that of all the Great Lakes combined.[10]

Like Lake Tanganyika, Lake Baikal was formed as an ancient rift valley, having the typical long crescent shape with a surface area of 31,722 km2 (12,248 sq mi). Baikal is home to more than 1,700 species of plants and animals, two-thirds of which can be found nowhere else in the world[11] and was declared a UNESCO World Heritage Site in 1996.[12] It is also home to Buryat tribes who reside on the eastern side of Lake Baikal,[13][14] rearing goats, camels, cattle, and sheep,[14] where the mean temperature varies from a winter minimum of −19 °C (−2 °F) to a summer maximum of 14 °C (57 °F).[15]

Geography and hydrography

A digital elevation model of Lake Baikal region
The Yenisei River basin, which includes Lake Baikal

Lake Baikal is in a rift valley, created by the Baikal Rift Zone, where the Earth's crust pulls apart.[5] At 636 km (395 mi) long and 79 km (49 mi) wide, Lake Baikal has the largest surface area of any freshwater lake in Asia, at 31,722 km2 (12,248 sq mi), and is the deepest lake in the world at 1,642 m (5,387 ft). The bottom of the lake is 1,186.5 m (3,893 ft) below sea level, but below this lies some 7 km (4.3 mi) of sediment, placing the rift floor some 8–11 km (5.0–6.8 mi) below the surface: the deepest continental rift on Earth.[5] In geological terms, the rift is young and active—it widens about two cm per year. The fault zone is also seismically active; there are hot springs in the area and notable earthquakes every few years. The lake is divided into three basins: North, Central, and South, with depths of about 900 m (3,000 ft), 1,600 m (5,200 ft), and 1,400 m (4,600 ft), respectively. Fault-controlled accommodation zones rising to depths of about 300 m (980 ft) separate the basins. The North and Central basins are separated by Academician Ridge while the area around the Selenga Delta and the Buguldeika Saddle separates the Central and South basins. The lake drains into the Angara tributary of the Yenisei. Notable landforms include Cape Ryty on Baikal's northwest coast.

Baikal's age is estimated at 25–30 million years, making it one of the most ancient lakes in geological history.[citation needed] It is unique among large, high-latitude lakes, in that its sediments have not been scoured by overriding continental ice sheets. U.S. and Russian studies of core sediment in the 1990s provide a detailed record of climatic variation over the past 6.7 mln. years. [16][17] Longer and deeper sediment cores are expected in the near future. Lake Baikal is the only confined freshwater lake in which direct and indirect evidence of gas hydrates exists.[18][19][20]

The lake is completely surrounded by mountains. The Baikal Mountains on the north shore and the taiga are technically protected as a national park. It contains 27 islands; the largest, Olkhon, is 72 km (45 mi) long and is the third-largest lake-bound island in the world. The lake is fed by as many as 330 inflowing rivers.[4] The main ones draining directly into Baikal are the Selenga River, the Barguzin River, the Upper Angara River, the Turka River, the Sarma River, and the Snezhnaya River. It is drained through a single outlet, the Angara River.

Despite its great depth, the lake's waters are well-mixed and well-oxygenated throughout the water column, compared to the stratification that occurs in such bodies of water as Lake Tanganyika and the Black Sea.

  • Lake Baikal as seen from the OrbView-2 satellite
    Lake Baikal as seen from the OrbView-2 satellite
  • Spring ice melt underway on Lake Baikal
    Spring ice melt underway on Lake Baikal
  • Circle of thin ice, diameter of4.4 km (2.7 mi) at the lake's southern tip, probably caused by convection
    Circle of thin ice, diameter of4.4 km (2.7 mi) at the lake's southern tip, probably caused by convection
  • Delta of the Selenga River, Baikal's main tributary
    Delta of the Selenga River, Baikal's main tributary
  • Mountains seen from the banks of Baikal
    Mountains seen from the banks of Baikal

Wildlife and vegetation

The Baikal seal is endemic to Lake Baikal

Lake Baikal is rich in biodiversity. It hosts more than 1,000 species of plants and 2,500 species of animals based on current knowledge, but the actual figures for both groups are believed to be significantly higher.[21][22] More than 80% of the animals are endemic (found only at Lake Baikal).[22] The Baikal seal or nerpa (Pusa sibirica) is found throughout Lake Baikal.[23] It is one of only three entirely freshwater seal populations in the world, the other two being subspecies of ringed seal.

The watershed of Lake Baikal has numerous flora species represented. The marsh thistle, Cirsium palustre, is found here at the eastern limit of its geographic range.[24]

Fish

Two species of grayling (Thymallus baikalensis and T. brevipinnis) are found only in Baikal and rivers that drain into the lake.[25][26]

In total there are less than 60 native fish species in the lake, but more than half of these are endemic.[21] The families Abyssocottidae (deep-water sculpins), Comephoridae (golomyankas or Baikal oilfish) and Cottocomephoridae (Baikal sculpins) are entirely restricted to the lake basin.[21][27] All these are part of Cottoidea. Of particular note are the two species of golomyanka (Comephorus baicalensis and C. dybowskii). These long-finned, translucent fish typically live in open water in depths of 100–500 m (330–1,640 ft), but occur both shallower and much deeper. They are the primary prey of the Baikal seal and represent the largest fish biomass in the lake.[28] Beyond members of Cottoidea, there are few endemic fish species in the lake.[21]

The most important local species for fisheries is the omul (Coregonus migratorius), an endemic whitefish.[21] It is caught, smoked and then sold widely in markets around the lake. There is also a second endemic whitefish in the lake, C. baicalensis.[29] The Baikal black grayling (Thymallus baicalensis), Baikal white grayling (T. brevipinnis) and the Baikal sturgeon (Acipenser baerii baicalensis) are other important species with commercial value. They are also endemic to the Lake Baikal basin.[25][26][30][31]

Invertebrates

The lake hosts rich endemic fauna of invertebrates. Epischura baikalensis is endemic to Lake Baikal and the dominating zooplankton species there, making up 80 to 90% of total biomass.[32]

Among the most diverse invertebrate groups are the turbellarian worms, freshwater snails, and amphipod crustaceans.

There are more than 350 species and subspecies of amphipods in the lake and all are endemic.[22] They are exceptionally diverse in ecology and appearance, ranging from the pelagic Macrohectopus to the relatively large deep-water Abyssogammarus and Garjajewia, the tiny herbivorous Micruropus, and the parasitic Brandtia (parasite of lubomirskiid sponges such as Lubomirskia baicalensis) and Pachyschesis (parasitic on other amphipods).[33] The "gigantism" of some Baikal amphipods, which has been compared to that seen in Antarctic amphipods, has been linked to the high level of dissolved oxygen in the lake.[34] Among the "giants" are several species of spiny Acanthogammarus that are found at both shallow and large depths.[35] These conspicuous and common amphipods are essentially carnivores (will also take detritus), and can reach a body length of up to 7 cm (2.8 in).[33][35]

As of 2006, almost 150 freshwater snails are known from Lake Baikal, including 117 endemic species from the subfamilies Baicaliinae (part of Amnicolidae) and Benedictiinae (part of Lithoglyphidae), and the families Planorbidae and Valvatidae.[36] All endemics have been recorded between 20 and 30 m (66 and 98 ft), but the majority mainly live at shallower depths.[36] About 30 freshwater snail species can be seen deeper than 100 m (330 ft), which represents the approximate limit of the sunlight zone, but only 10 are truly deep water species.[36] In general, Baikal snails are thin-shelled and small. Two of the most common species are Benedictia baicalensis and Megalovalvata baicalensis.[37] Bivalve diversity is lower with more than 30 species; about half of these, all in the families Euglesidae, Pisidiidae and Sphaeriidae, are endemic (the only other family in the lake is Unionidae with a single non-endemic species).[37][38] The endemic bivalves are mainly found in shallow depths, with few species from deep water.[39]

With almost 200 described species, including more than 160 endemics, the center of diversity for aquatic freshwater oligochaetes is Lake Baikal.[40] A smaller number of other freshwater annelids are known the lake: 13 species of Hirudinea (leeches) and 4 polychaetes.[40] Several hundred species of nematodes are known from the lake, but a large percentage of these are undescribed.[40]

There are at least 18 species of sponges in the lake,[41] including 14 species from the endemic family Lubomirskiidae (the remaining are from the non-endemic family Spongillidae).[42] In the nearshore regions of Baikal, the largest benthic biomass is sponges.[41] Lubomirskia baicalensis, Baikalospongia bacillifera and B. intermedia are unusually large for freshwater sponges and can reach 1 m (3.3 ft) or more.[41][43] These three are also the most common sponges in the lake.[41] Most sponges in the lake are typically green when alive because of symbiotic dinoflagellates (zoochlorella), but can also be brownish or yellowish.[44]

History

The Baikal area has a long history of human habitation. An early known tribe in the area was the Kurykans, forefathers of two ethnic groups: the Buryats and Yakuts.

Lake Baikal was situated in the northern territory of the Xiongnu confederation, and was a site of the Han–Xiongnu War, where the armies of the Han dynasty pursued and defeated the Xiongnu forces from the second century BC to the first century AD. They recorded that the lake was a "huge sea" (hanhai) and designated it the North Sea (Běihǎi) of the semimythical Four Seas.[45] The Kurykans, a Siberian tribe who inhabited the area in the sixth century, gave it a name that translates to "much water". Later on, it was called "natural lake" (Baygal nuur) by the Buryats and "rich lake" (Bay göl) by the Yakuts.[46] Little was known to Europeans about the lake until Russia expanded into the area in the 17th century. The first Russian explorer to reach Lake Baikal was Kurbat Ivanov in 1643.[47]

Russian expansion into the Buryat area around Lake Baikal[48] in 1628–1658 was part of the Russian conquest of Siberia. It was done first by following the Angara River upstream from Yeniseysk (founded 1619) and later by moving south from the Lena River. Russians first heard of the Buryats in 1609 at Tomsk. According to folktales related a century after the fact, in 1623, Demid Pyanda, who may have been the first Russian to reach the Lena, crossed from the upper Lena to the Angara and arrived at Yeniseysk.[49] Vikhor Savin (1624) and Maksim Perfilyev (1626 and 1627–1628) explored Tungus country on the lower Angara. To the west, Krasnoyarsk on the upper Yenisei was founded in 1627. There were a number of ill-documented expeditions eastward from Krasnoyarsk. In 1628, Pyotr Beketov first encountered a group of Buryats and collected yasak from them at the future site of Bratsk. In 1629, Yakov Khripunov set off from Tomsk to find a rumored silver mine. His men soon began plundering both Russians and natives. They were joined by another band of rioters from Krasnoyarsk, but left the Buryat country when they ran short of food. This made it difficult for other Russians to enter the area. In 1631, Maksim Perfilyev built an ostrog at Bratsk. The pacification was moderately successful, but in 1634, Bratsk was destroyed and its garrison killed. In 1635, Bratsk was restored by a punitive expedition under Radukovskii. In 1638, it was besieged unsuccessfully.

In 1638, Perfilyev crossed from the Angara over the Ilim portage to the Lena River and went downstream as far as Olyokminsk. Returning, he sailed up the Vitim River into the area east of Lake Baikal (1640) where he heard reports of the Amur country. In 1641, Verkholensk was founded on the upper Lena. In 1643, Kurbat Ivanov went further up the Lena and became the first Russian to see Lake Baikal and Olkhon Island. Half his party under Skorokhodov remained on the lake, reached the Upper Angara at its northern tip and wintered on the Barguzin River on the northeast side. In 1644, Ivan Pokhabov went up the Angara to Baikal, becoming perhaps the first Russian to use this route which is difficult because of the rapids. He crossed the lake and explored the lower Selenge River. About 1647, he repeated the trip, obtained guides and visited a 'Tsetsen Khan' near Ulan Bator. In 1648, Ivan Galkin built an ostrog on the Barguzin River which became a center for eastward expansion. In 1652, Vasily Kolesnikov reported from Barguzin that one could reach the Amur country by following the Selenga, Uda, and Khilok Rivers to the future sites of Chita and Nerchinsk. In 1653, Pyotr Beketov took Kolesnikov's route to Lake Irgen west of Chita, and that winter his man Urasov founded Nerchinsk. Next spring, he tried to occupy Nerchensk, but was forced by his men to join Stephanov on the Amur. Nerchinsk was destroyed by the local Tungus, but restored in 1658.

The Trans-Siberian Railway was built between 1896 and 1902. Construction of the scenic railway around the southwestern end of Lake Baikal required 200 bridges and 33 tunnels. Until its completion, a train ferry transported railcars across the lake from Port Baikal to Mysovaya for a number of years. The lake became the site of the minor engagement between the Czechoslovak legion and the Red Army in 1918. At times during winter freezes, the lake could be crossed on foot—though at risk of frostbite and deadly hypothermia from the cold wind moving unobstructed across flat expanses of ice. In the winter of 1920, the Great Siberian Ice March occurred, when the retreating White Russian Army crossed frozen Lake Baikal. The wind on the exposed lake was so cold, many people died, freezing in place until spring thaw. Beginning in 1956, the impounding of the Irkutsk Dam on the Angara River raised the level of the lake by 1.4 m (4.6 ft).[50]

As the railway was built, a large hydrogeographical expedition headed by F.K. Drizhenko produced the first detailed contour map of the lake bed.[8]

  • Buryat shaman on Olkhon Island
    Buryat shaman on Olkhon Island
  • Russian map circa 1700, Baikal (not to scale) is at top
    Russian map circa 1700, Baikal (not to scale) is at top
  • Steam locomotive on the circum-Baikal railroad
    Steam locomotive on the circum-Baikal railroad

Research

Baikal fishers fish for 15 commercially exploited species. The omul, found only in Baikal, accounts for most of the catch.[51]

Several organizations are carrying out natural research projects on Lake Baikal. Most of them are governmental or associated with governmental organizations. The Baikal Research Centre is an independent research organization carrying out environmental educational and research projects at Lake Baikal.[52]

In July 2008, Russia sent two small submersibles, Mir-1 and Mir-2, to descend 1,592 m (5,223 ft) to the bottom of Lake Baikal to conduct geological and biological tests on its unique ecosystem. Although originally reported as being successful, they did not set a world record for the deepest freshwater dive, reaching a depth of only 1,580 m (5,180 ft).[53] That record is currently held by Anatoly Sagalevich, at 1,637 m (5,371 ft) (also in Lake Baikal aboard a Pisces submersible in 1990).[53][54] Russian scientist and federal politician, Artur Chilingarov, the leader of the mission, took part in the Mir dives[55] as did Russian leader Vladimir Putin.

Since 1993, neutrino research has been conducted at the Baikal Deep Underwater Neutrino Telescope (BDUNT). The Baikal Neutrino Telescope NT-200 is being deployed in Lake Baikal, 3.6 km (2.2 mi) from shore at a depth of 1.1 km (0.68 mi). It consists of 192 optical modules (OMs).[56]

Economy

The lake, nicknamed "the Pearl of Siberia", drew investors from the tourist industry as energy revenues sparked an economic boom.[57] Viktor Grigorov's Grand Baikal in Irkutsk is one of the investors, who planned to build three hotels, creating 570 jobs. In 2007, the Russian government declared the Baikal region a special economic zone. A popular resort in Listvyanka is home to the seven-story Hotel Mayak. At the northern part of the lake, Baikalplan (a German NGO) built together with Russians in 2009 the Frolikha Adventure Coastline Track, a 100-kilometer (62 mi)-long long-distance trail as example for a sustainable development of the region. Baikal was also declared a UNESCO World Heritage site in 1996. Rosatom plans to build a laboratory in Baikal, in conjunction with an international uranium plant and to invest $2.5 billion in the region and create 2,000 jobs in the city of Angarsk.[57]

Tourism industry on Lake Baikal
  • A lake surrounded forested hills with a small boat in the distance
    Recreational boaters on Chivyrkuisky Bay
  • A sandy beach showing cabins and boats drawn up on the shore
    Sportfishing boats on Lake Baikal
  • A man pulling two sledges on a frozen lake, approaching a crack in the ice
    Czech adventure tourist crosses the frozen lake
  • Interior of a wooden structure containing a spa pool, with people
    A thermal spa at Zagza in the Kabansky District

Environmental concerns

Baykalsk Pulp and Paper Mill

Baykalsk Pulp and Paper Mill

The Baykalsk Pulp and Paper Mill was constructed in 1966, directly on the shoreline, bleaching paper with chlorine and discharging waste into Baikal. After decades of protest, the plant was closed in November 2008 due to unprofitability.[58][59] In March 2009, the plant owner announced the paper mill would never reopen.[60] However, on 4 January 2010, the production was resumed. On 13 January 2010, Vladimir Putin introduced changes in the legislation legalising the operation of the mill, which brought about a wave of protests of ecologists and local residents.[61] This was based on Putin's visual verification from a minisubmarine, "I could see with my own eyes — and scientists can confirm — Baikal is in good condition and there is practically no pollution".[62] In September 2013, the mill underwent a final bankruptcy, with the last 800 workers slated to lose their jobs by 28 December 2013.[63]

Planned East Siberia-Pacific Ocean oil pipeline

The lake in the winter, as seen from the tourist resort of Listvyanka: The ice is thick enough to support pedestrians and snowmobiles.
Main article: Eastern Siberia–Pacific Ocean oil pipeline

Russian oil pipelines state company Transneft[64] was planning to build a trunk pipeline that would have come within 800 meters (2,600 ft) of the lake shore in a zone of substantial seismic activity. Environmental activists in Russia,[65] Greenpeace, Baikal pipeline opposition[66] and local citizens[67] were strongly opposed to these plans, due to the possibility of an accidental oil spill that might cause significant damage to the environment. According to the Transneft's president, numerous meetings with citizens near the lake were held in towns along the route, especially in Irkutsk.[68] However, it was not until Russian president Vladimir Putin ordered the company to consider an alternative route 40 kilometers (25 mi) to the north to avoid such ecological risks that Transneft agreed to alter its plans.[69] Transneft has since decided to move the pipeline away from Lake Baikal, so that it will not pass through any federal or republic natural reserves.[70][71] Work began on the pipeline, two days after President Putin agreed to changing the route away from Lake Baikal.[72]

Proposed nuclear plant

In 2006, the Russian government announced plans to build the world's first International Uranium Enrichment Centre at an existing nuclear facility in Angarsk, 95 km (59 mi) from the lake's shores. However, critics and environmentalists argue it would be a disaster for the region and are urging the government to reconsider.[73]

After enrichment, only 10% of the uranium-derived radioactive material would be exported to international customers,[73] leaving 90% in the Lake Baikal region for storage. Uranium tailings contain radioactive and toxic materials, which if improperly stored, are potentially dangerous to humans and can contaminate rivers and lakes.[73]

Other pollutions sources

According to The Moscow Times, increasing amount invasive species of algae thrive in the lake from hundreds of tons of liquid waste, including fuel and excrement, regularly disposed into the lake by tourist sites; and up to 25,000 tons of liquid waste disposed every year by local ships.[74]

Historical traditions

An 1883 British map using the More Baikal (Baikal Sea) designation, rather than the conventional Ozero Baikal (Lake Baikal)

The first European to reach the lake is said to be Kurbat Ivanov in 1643.[75]

In the past, the Baikal was referred to by many Russians as the "Baikal Sea" (Template:Lang-ru, More Baikal), rather than merely "Lake Baikal" (Template:Lang-ru, Ozero Baikal).[76] This usage is attested already on the late-17th century maps by Semyon Remezov.[77] To this day, the strait between the western shore of the Lake and the Olkhon Island is called Maloye More (Малое Море), i.e. "the Little Sea".

Lake Baikal is nicknamed "Older sister of Sister Lakes (Lake Khövsgöl and Lake Baikal)".[citation needed]

According to 19th-century traveler T. W. Atkinson, locals in the Lake Baikal Region had the tradition that Christ visited the area:

The people have a tradition in connection with this region which they implicitly believe. They say "that Christ visited this part of Asia and ascended this summit, whence he looked down on all the region around. After blessing the country to the northward, he turned towards the south, and looking across the Baikal, he waved his hand, exclaiming 'Beyond this there is nothing.'" Thus they account for the sterility of Daouria, where it is said "no corn will grow."[78]

Lake Baikal has been celebrated in several Russian folk songs. Two of these songs are well known in Russia and its neighboring countries, such as Japan.

  • "The Glorious Sea – Sacred Baikal" (in Template:Lang-ru) is about a katorga fugitive. The lyrics as documented and edited in the 19th century by Dmitriy P. Davydov (1811–1888).[79] See "Barguzin River" for sample lyrics.

The latter song was a secondary theme song for the Soviet Union's second color film, Ballad of Siberia (1947; in Template:Lang-ru).

  • In The Way Back (2010) and the memoir on which it is based, The Long Walk (1955), Lake Baikal is a major landmark and waystation for a group of men who escaped from a Siberian Gulag, and the point where the group meets up with Irena, a Polish orphan
  • View of Lake Baikal
    View of Lake Baikal
  • Shamanka, or Shaman's Rock on Olkhon Island
    Shamanka, or Shaman's Rock on Olkhon Island
  • Icebound shore of Baikal in early April, at Listvyanka
    Icebound shore of Baikal in early April, at Listvyanka
  • Pod of seals on Baikal
    Pod of seals on Baikal
  • Late 19th-century steam icebreaker Baikal in port
    Late 19th-century steam icebreaker Baikal in port
  • Baikal omul at market
    Baikal omul at market
  • The Olkhon Island ferry
    The Olkhon Island ferry
  • Origin of the Angara River at Lake Baikal

References

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