|Lake type||Continental rift lake|
|Primary inflows||Selenge, Barguzin, Upper Angara|
|Catchment area||560,000 km2 (216,000 sq mi)|
|Basin countries||Russia and Mongolia|
|Max. length||636 km (395 mi)|
|Max. width||79 km (49 mi)|
|Surface area||31,722 km2 (12,248 sq mi)|
|Average depth||744.4 m (2,442 ft)|
|Max. depth||1,642 m (5,387 ft)|
|Water volume||23,615.39 km3 (5,670 cu mi)|
|Residence time||330 years|
|Shore length1||2,100 km (1,300 mi)|
|Surface elevation||455.5 m (1,494 ft)|
|Islands||27 (Olkhon Island)|
|UNESCO World Heritage Site|
|Criteria||Natural: vii, viii, ix, x|
|Inscription||1996 (20th Session)|
|1 Shore length is not a well-defined measure.|
Lake Baikal (Russian: о́зеро Байка́л, tr. Ozero Baykal, IPA: [ˈozʲɪrə bɐjˈkaɫ]; Russia Buriat: Байгал нуур, Baigal nuur; Mongolian: Байгал нуур, Baigal nuur, etymologically meaning, in Mongolian, "the Nature Lake") is a rift lake in Russia, located in southern Siberia, between Irkutsk Oblast to the northwest and the Buryat Republic to the southeast.
Lake Baikal is the largest freshwater lake by volume in the world, containing 22–23% of the world's fresh surface water. With 23,615.39 km3 (5,670 cu mi) of fresh water, it contains more water than the North American Great Lakes combined. With a maximum depth of 1,642 m (5,387 ft), Baikal is the world's deepest lake. It is considered among the world's clearest lakes and is considered the world's oldest lake — at 25–30 million years. It is the seventh-largest lake in the world by surface area.
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 thousands of species of plants and animals, many of which exist nowhere else in the world. The lake was declared a UNESCO World Heritage Site in 1996. It is also home to Buryat tribes who reside on the eastern side of Lake Baikal, rearing goats, camels, cattle, and sheep, where the mean temperature varies from a winter minimum of −19 °C (−2 °F) to a summer maximum of 14 °C (57 °F).
- 1 Geography and hydrography
- 2 Fauna and flora
- 3 History
- 4 Research
- 5 Economy
- 6 Environmental concerns
- 7 Historical traditions
- 8 See also
- 9 Literature
- 10 References
- 11 External links
Geography and hydrography
Lake Baikal is in a rift valley, created by the Baikal Rift Zone, where the Earth's crust is slowly pulling apart. 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. In geological terms, the rift is young and active—it widens about 2 cm (0.8 in) per year. The fault zone is also seismically active; hot springs occur in the area and notable earthquakes happen every few years. The lake is divided into three basins: North, Central, and South, with depths 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 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 the most ancient lake in geological history. It is unique among large, high-latitude lakes, as its sediments have not been scoured by overriding continental ice sheets. Russian, U.S., and Japanese cooperative studies of deep-drilling core sediments in the 1990s provide a detailed record of climatic variation over the past 6.7 million years. 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.
The lake is completely surrounded by mountains. The Baikal Mountains on the north shore, the Barguzin Range on the northeastern 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. 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.
In Lake Baikal, the water temperature varies significantly depending on location, depth, and time of the year. During the winter and spring, the surface freezes for 4–5 months; from early January to May–June (latest in the north), the entire lake surface is covered in ice. On average, the ice reaches a thickness of 0.5 to 1.4 m (1.6–4.6 ft), but in some places with hummocks, it can be more than 2 m (6.6 ft). During this period, the temperature slowly increases with depth in the lake, being coldest near the ice-covered surface at around freezing, and reaching about 3.5–3.8 °C (38.3–38.8 °F) at a depth of 200–250 m (660–820 ft). After the surface ice breaks up, the surface water is slowly warmed up by the sun, and in June, the upper circa 300 m (980 ft) becomes homothermic (same temperature throughout) because of water mixing. The sun continues to heat up the surface layer, and at the peak in August can reach up to about 16 °C (61 °F) in the main sections and 20 °C (68 °F) in shallow bays in the southern half of the lake. During this time, the pattern is inverted compared to the winter and spring, as the water temperature falls with increasing depth. As the autumn begins, the surface temperature falls again and a second homothermic period of the upper circa 300 m (980 ft) occurs in November. In the deepest parts of the lake, from about 300 m (980 ft), the temperature is very stable at 3.1–3.4 °C (37.6–38.1 °F) with only minor annual variations.
The average surface temperature has risen by almost 1.5 °C (2.7 °F) in the last 50 years, resulting in a shorter period where the lake is covered by ice. At some locations, hydrothermal vents with water that can be about 50 °C (122 °F) have been found. These are mostly in deep water, but locally have also been found in relatively shallow water. They have very little effect on the lake's temperature because of its huge volume.
Lake Baikal as seen from the OrbView-2 satellite
Delta of the Selenga River, Baikal's main tributary
Fauna and flora
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. More than 80% of the animals are endemic.
Submerged macrophytic vascular plants are mostly absent, except in some shallow bays along the shores of Lake Baikal. More than 85 species of submerged macrophytes have been recorded, including genera such as Ceratophyllum, Myriophyllum, Potamogeton, and Sparganium. The invasive species Elodea canadensis was introduced to the lake in the 1950s. Instead of vascular plants, aquatic flora is often dominated by several green algae species, notably Draparnaldioides, Tetraspora, and Ulothrix in water shallower than 20 m (65 ft), although Aegagrophila, Cladophora, and Draparnaldioides may occur deeper than 30 m (100 ft). Except for Ulothrix, endemic Baikal species are in all these green algae genera. More than 400 diatom species, both benthic and planktonic, are found in the lake, and about half of these are endemic to Baikal; however, significant taxonomic uncertainties remain for this group.
The Baikal seal or nerpa (Pusa sibirica) is found throughout Lake Baikal. It is one of only three entirely freshwater seal populations in the world, the other two being subspecies of ringed seals.
A wide range of land mammals can be found in the habitats around the lake, such as brown bear, wolf, red fox, sable, stoat, moose, Siberian red deer, reindeer, Siberian roe deer, Siberian musk deer, wild boar, red squirrel, Siberian chipmunk, marmot, lemming, and Alpine hare. Until the Early Middle Ages, the wisent (European bison) was present near the lake, which was the easternmost part of its range.
Fewer than 65 native fish species occur in the lake basin, but more than half of these are endemic. The families Abyssocottidae (deep-water sculpins), Comephoridae (golomyankas or Baikal oilfish), and Cottocomephoridae (Baikal sculpins) are entirely restricted to the lake basin. All these are part of the Cottoidea and are typically less than 20 cm (8 in) long. Of particular note are the two species of golomyanka (Comephorus baicalensis and C. dybowskii). These long-finned, translucent fish typically live in open water at depths of 100–500 m (330–1,640 ft), but occur both shallower and much deeper. Together with certain abyssocottid sculpins, they are the deepest living freshwater fish in the world, occurring to near the bottom of Lake Baikal. The golomyankas are the primary prey of the Baikal seal and represent the largest fish biomass in the lake. Beyond members of Cottoidea, there are few endemic fish species in the lake basin.
The most important local species for fisheries is the omul (Coregonus migratorius), an endemic whitefish. It is caught, smoked, and then sold widely in markets around the lake. Also, a second endemic whitefish inhabits the lake, C. baicalensis. The Baikal black grayling (Thymallus baicalensis), Baikal white grayling (T. brevipinnis), and Baikal sturgeon (Acipenser baerii baicalensis) are other important species with commercial value. They are also endemic to the Lake Baikal basin.
More than 350 species and subspecies of amphipods are endemic to the lake. 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 Pachyschesis (parasitic on other amphipods). 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. Among the "giants" are several species of spiny Acanthogammarus found at both shallow and deep depths. These conspicuous and common amphipods are essentially carnivores (will also take detritus), and can reach a body length up to 7 cm (2.8 in).
Snails and bivalves
As of 2006[update], almost 150 freshwater snails are known from Lake Baikal, including 117 endemic species from the subfamilies Baicaliinae (part of the Amnicolidae) and Benedictiinae (part of the Lithoglyphidae), and the families Planorbidae and Valvatidae. All endemics have been recorded between 20 and 30 m (66 and 98 ft), but the majority mainly live at shallower depths. 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 deepwater species. In general, Baikal snails are thin-shelled and small. Two of the most common species are Benedictia baicalensis and Megalovalvata baicalensis. 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 the Unionidae with a single nonendemic species). The endemic bivalves are mainly found in shallows, with few species from deep water.
Annelid, nematode and flat worms
With almost 200 described species, including more than 160 endemics, the center of diversity for aquatic freshwater oligochaetes is Lake Baikal. A smaller number of other freshwater annelids is known: 13 species of leeches (Hirudinea) and four polychaetes. Several hundred species of nematodes are known from the lake, but a large percentage of these are undescribed. More than 140 endemic flat worm (Plathelminthes) species are in Lake Baikal, where they occur on a wide range of bottom types. Most of the flat worms are predatory, and some are relatively brightly marked. They are often very abundant in shallow waters, where they are typically less than 2 cm (1 in) long, but in deeper parts of the lake, the largest, Baikaloplana valida, can reach up to 30 cm (1 ft) when outstretched.
At least 18 species of sponges occur in the lake, including 14 species from the endemic family Lubomirskiidae (the remaining are from the nonendemic family Spongillidae). In the nearshore regions of Baikal, the largest benthic biomass is sponges. Lubomirskia baicalensis, Baikalospongia bacillifera, and B. intermedia are unusually large for freshwater sponges and can reach 1 m (3.3 ft) or more. These three are also the most common sponges in the lake. While the Baikalospongia species typically have encrusting or carpet-like structures, L. baikalensis often has branching structures and in areas where common may form underwater "forests". Most sponges in the lake are typically green when alive because of symbiotic chlorophytes (zoochlorella), but can also be brownish or yellowish.
The Baikal area, sometimes known as Baikalia, 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 the Yakuts.
Located in the former northern territory of the Xiongnu confederation, Lake Baikal is one 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. 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. 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.
Russian expansion into the Buryat area around Lake Baikal in 1628–58 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.
Vikhor Savin (1624) and Maksim Perfilyev (1626 and 1627–28) explored Tungus country on the lower Angara. To the west, Krasnoyarsk on the upper Yenisei was founded in 1627. A number of ill-documented expeditions explored eastward from Krasnoyarsk. In 1628, Pyotr Beketov first encountered a group of Buryats and collected yasak (tribute) 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).
Several organizations are carrying out natural research projects on Lake Baikal. Most of them are governmental or associated with governmental organizations. The Baikalian Research Centre is an independent research organization carrying out environmental educational and research projects at Lake Baikal.
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). 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). Russian scientist and federal politician Artur Chilingarov, the leader of the mission, took part in the Mir dives 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.
The lake, nicknamed "the Pearl of Siberia", drew investors from the tourist industry as energy revenues sparked an economic boom. 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 km (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 near 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.
Lake Baikal is a popular destination among tourists from all over the world. According to the Russian Federal State Statistics Service, in 2013, 79,179 foreign tourists visited Irkutsk and Lake Baikal; in 2014 - 146,937 visitors. The most popular places to stay by the lake are Listvyanka village, Olkhon island, Kotelnikovsky cape, Baykalskiy Priboi, resort Khakusy and Turka village. The popularity of Lake Baikal is growing from year to year, but there is no developed infrastructure in the area. For the quality of service and comfort from the visitor's point of view, Lake Baikal still has a long way to go.
The ice road to Olkhon Island is the only legal ice road on Lake Baikal. The route is prepared by specialists every year and it opens when the ice conditions allow it. In 2015, the ice road to Olkhon was open from February 17 to March 23. The thickness of the ice on the road is about 60 cm (24 in), maximum capacity allowed – 10 t (9.8 long tons; 11 short tons); it is open to the public from 9 am to 6 pm. The road through the lake is 12 km (7.5 mi) long and it goes from the village Kurkut on the mainland, to Irkutskaya Guba on Olkhon Island.
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. That desition had the strongest protest from Soviet scientists, according to them the ultra-pure water of the lake was so significant resource for innovation chemical production (for instance, the production of high-quality viscose for aero and space industry), that it was very irrationally changing water's quality by paper production. It was also necessary to save endemic (relict) species of local biota and keep territory around Baikal lake as recreation zone . However, that nature keeping ideas of Soviet scientist faced with the opposition of Industrial lobby and only after decades of protest, the plant was closed in November 2008 due to unprofitability. In March 2009, the plant owner announced the paper mill would never reopen. On 4 January 2010, 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. 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". In September 2013, the mill underwent a final bankruptcy, with the last 800 workers slated to lose their jobs by 28 December 2013. On 28 December 2013 the Russian government decided to build a Russian Nature Reserves Expo Center in place of the paper mill.
Planned East Siberia-Pacific Ocean oil pipeline
Russian oil pipelines state company Transneft was planning to build a trunk pipeline that would have come within 800 m (2,600 ft) of the lake shore in a zone of substantial seismic activity. Environmental activists in Russia, Greenpeace, Baikal pipeline opposition and local citizens 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. Transneft agreed to alter its plans when Russian president Vladimir Putin ordered the company to consider an alternative route 40 kilometers (25 mi) to the north to avoid such ecological risks. 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. Work began on the pipeline two days after President Putin agreed to changing the route away from Lake Baikal.
Proposed nuclear enrichment 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. Critics and environmentalists argue it would be a disaster for the region and are urging the government to reconsider.
After enrichment, only 10% of the uranium-derived radioactive material would be exported to international customers, leaving 90% near 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.
Other pollution sources
According to The Moscow Times and Vice, an increasing number of an invasive species of algae thrives 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 are disposed of every year by local ships.
In the past, the Baikal was referred to by many Russians as the "Baikal Sea" (Russian: Море Байкал, More Baikal), rather than merely "Lake Baikal" (Russian: Озеро Байкал, Ozero Baikal). This usage is attested already in the Life of Protopope Avvakum (1621–1682), and on the late-17th-century maps by Semyon Remezov. It is also attested in the famous song, now passed into the tradition, that opens with the words Славное море, священный Байкал (Glorious sea, [the] sacred Bajkal). 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".
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."
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.
- "Glorious Sea, Sacred Baikal" (in Russian: Славное Mope, Священный Байкал) is about a katorga fugitive. The lyrics as documented and edited in the 19th century by Dmitriy P. Davydov (1811–1888). See "Barguzin River" for sample lyrics.
- "The Wanderer" (in Russian: Бродяга) is about a convict who had escaped from jail and was attempting to return home from Transbaikal. The lyrics were collected and edited in the 20th century by Ivan Kondratyev.
- Detlev Henschel: Kayak Adventure in Siberia: The first solo circumnavigation of Lake Baikal. Amazon ISBN 978-3-7375-6102-0.
- Leonid Borodin: Year Of Miracle And Grief, Quartet Books, 1988.
Superficially about a family's move to a town by Lake Baikal where the parents have been contracted to teach, their son's discovery of a magic cave, and his subsequent involvement in a feud between supernatural beings living there. The feud was a simile for the intellectual conflict in late period Soviet Russia, and Lake Baikal a metaphor for the incorruptibility of the Russian soul. https://books.google.it/books/about/Year_of_Miracle_and_Grief.html?id=5Dx1mwEACAAJ
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