Abstract
During the past 5 million years significant changes have taken place in the Lake Baikal ecosystem. The climate changed from subtropical, with average annual air temperatures (T air) of 15–10 °C, to a moderate one with T air of ~0 °C. The modern hydrophysical regime of the lake has been formed with increase in depth, and gradual cooling of the water body from deepwater temperatures (T dw) of 15–10 °C to below 4 °C. The processes of cooling of Lake Baikal water in its transition from subtropical climate with deep temperatures greater than those of maximal density (T md) are similar to modern processes of deepwater cooling of the Mediterranean type of MEDOC convection. Such intensive mechanisms of vertical exchange (MVE) are similar to autumn homothermy in Lake Baikal. However, they are higher than T md. Inverse thermal stratification began to occur in surface layers in cold periods of the year after the deep water had cooled to T md. The character of water exchange also changed; instead of a monomictic lake with warm water from surface to bottom, the lake has become dimictic with lower water below 4 °C, i.e. vertical mixing now occurs not once but twice a year. Winter ice cover began about a million years ago.
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Bezrukova E., Bukharov A., Bychinsky V. et al. (2004) High-resolution sedimentary record in a new BDP-99 core from Posolsk Bank in Lake Baikal. Geologiya Geofizika 45: 163–193 (in Russian).
Edmond J. M., Stallard R. F., Craig H. et al. (1993) Nutrient chemistry of the water column of Lake Tanganyika. Limnology and Oceanography 38: 725–738.
Haq Bilalu, U. & F. W. B. van Eysinga, 1994. Geological Time Table, (4th edn.) Elsevier.
Hutchinson G. E., 1957. A Treatise on Limnology, 1st edn. Willey, New York; Chapman and Hall, London, 1015 pp.
Khusid, T. A., Belyaeva V. N., Burmistrova I. I. (1993) On the history of deep Arctic Ocean. Oceanologiya 33: 930–934 (in Russian).
Kuimova, L. N. & P. P. Sherstyankin, 1998. Climate change and extreme hydrological events on Lake Baikal during the last 250,000 years. The Second International Conference on Climate and Water. Espoo, Finland, 17–20 August 1998, Vol. 3, 1197–1204 pp.
Kuz’min M. I., Grachev M. A., Wil’yams D., Kawai T., Horie Sh., Oberhensli X. (1997) The continuous annals paleoclimates last 4,5 millions years from Lake Baikal (first information). Geologiya Geofizika 38: 1021–1023 (in Russian).
Logachev, N. A., S. V. Rasskazov, & A. V. Ivanov, et al. 1996. Cenozoic rift genesis in continental lithosphere. In Litosfera tsentral’noi Asii, 57–80 (in Russian).
Mats, V. D., 1995. Development of the Baikal depression: chronology of the transformation of zoogeographic barriers. The Second Vereshchagin Baikal Conference, October 5–10, 1995. Abstracts. Irkutsk, 131 pp.
MEDOC group, 1969, 1970. Observation of formation of deep water in the mediterranean sea. Nature 227: 1037–1040.
Oceanographic tables 1975. Gidrometeoizdat, Leningrad (in Russian) 377 pp.
Popova, S. M., V. D. Mats & G. P. Chernyaeva et al. 1989. Paleolimnological reconstructions (In: The Baikal rift zone). Novosibirsk, “Nauka” (in Russian) 112 pp.
P. P. Sherstyankin V. S. Kaplin Maksimov (1972) ArticleTitleVertical distribution of a transparency in under ice period on Lake Baikal and its connection with biological parameters Idrobiologiska Journal 8 65–68
Sherstyankin, P. P., L. N. Kuimova & M. N. Shimaraev, 1995. On Paleothermohaline Regime of Lake Baikal. The Second Vereshchagin Baikal Conference, October 5–10, 1995. Abstrs Irkutsk, 231 pp.
Shimaraev M. N., Granin N. G., Kuimova L. N. (1995) Experience of reconstruction of hydrophysical conditions in Baikal in Late Pleistocene and Holocene. Geologiya Geofizika 36: 97–102 (in Russian).
Verbolov, V. I., 1964. Temperature regime of Bay Listvenichnyi on Lake Baikal. In Elements of a hydrometeorological Regime of Lake Baikal. Nauka, Moskva – Leningrad, pp. 38–51 (in Russian).
Vorobieva G. A., Mats V. D., Shimaraeva M. K. (1995) Late-Cenozoic paleoclimates in the Baikal region. Geologiya Geofizika 36: 82–96 (in Russian).
Yasamanov N. A. (1985) Ancient Climates of the Earth. Gidrometeoizdat, Leningrad, 295 pp (in Russian).
Zotikov I. A., Duxbury N. S. (2000) On genesis of the Vostok Lake (Antarctica). Doklady Akademii Nauk 374: 824–626 (in Russian).
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Sherstyankin, P.P., Kuimova, L.N. Hydrophysical processes in Lake Baikal in its transition from subtropical to modern climates. Hydrobiologia 568 (Suppl 1), 253–257 (2006). https://doi.org/10.1007/s10750-006-0306-x
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DOI: https://doi.org/10.1007/s10750-006-0306-x