Abstract
Based on shipboard and satellite observations, the characteristics of upwelling in Lake Baikal in the period of direct temperature stratification have been determined for the first time. Coastal upwellings appear annually under the effect of run-down and alongshore winds and are traced along the coast to a distance of up to 60–100 km and up to 250 km in North Baikal. Analogous to the way it occurs in seas, water rises from the depths of 100–200 m (350 m as a maximum) at the velocity of 0.1 × 10−2−6.5 × 10−2 cm/s. Divergence in the field of intràbasin cyclonic macrovortices produces upwelling in the Baikal pelagic zone and downwelling in the vicinity of shores; this lasts from 7 to 88 days and covers the depth interval of 80–300 m in August and up to 400–800 m in early-mid November. The area of upwellings occupies up to 20–60% of the separate basins of the lake. Vertical circulation of water in the field of pelagic upwellings leads to intensification of coastal currents and to formation of the thermobar with a heat inert zone in the central part of the lake in November, and this thermobar is not observed in other lakes, at that.
Similar content being viewed by others
References
N. N. Korchagin and A. S. Monin, Meso-Oceanology (Izd-vo RAN, Moscow, 2004) [in Russian].
P. M. Boyarinov and M. P. Petrov, Processes Forming Thermal Regime in Deep Freshwater Reservoirs (Nauka, Leningrad, 1991) [in Russian].
M. N. Shimaraev, V. I. Verbolov, N. G. Granin, and P. P. Sherstyankin, Physical Limnology of Lake Baikal: a Review (Okayama, Irkutsk, 1994).
G. Yu. Vereshchagin, in To the 50th Anniversary of V.I. Vernadsky Scientific and Educational Work (Izd-vo AN SSSR, Moscow, 1936), Vol. 2, pp. 1207–1230 [in Russian].
I. V. Glazunov, in Tr. Limnol. Inst. Siber. Otd Akad. Nauk SSSR (Izd-vo AN SSSR, Moscow, 1963), vol. 3, pp. 57–94 [in Russian].
V. I. Verbolov, N. G. Granin, A. A. Zhdanov, et al., Vodn. Resur., No. 5, 74–86 (1992).
S. V. Semovskii, M. N. Shimaraev, N. P. Min’ko, et al., Issled. Zemli iz Kosmosa, No. 5, 65–75 (1998).
Y. Tanaka, T. Katano, and O. Mitamura, et al., in Abstract of papers of the 4th Vereshchagin Baikal Conference, September 26–October 1, 2005 (In-t geografii SO RAN, Irkutsk, 2005), p. 178.
E. S. Troitskaya, M. N. Shimaraev, N. M. Budnev, et al., in Selected Papaers of Int. Conf., St. Petersburg, Russia, 2007 (In-t problem mekhaniki RAN, Moscow, 2008), pp. 270–275 [in Russian].
The Currents of Baikal, Ed. by A.N. Afanas’ev and V. I. Verbolov (Nauka, Novosibirsk, 1977) [in Russian].
V. I. Verbolov and M. N. Shimaraev, in Reports of Institute of Geography of Siberia and Far East, Siberian Branch, Akad. Nauk, USSR (Nauka, Novosibirsk, 1972), No. 36, pp. 41–48 [in Russian].
P. P. Sherstyankin, Khim. v Interesakh Ustoich. Razvit., No. 5, 443–451 (1997).
N. G. Granin, Abstract of Candidate’s Dissertation in Geography (In-t geografii SO RAN, Irkutsk, 1999).
N. Yu. Mogilev, N. G. Granin, R. Yu. Gnatovskii, et al., Geogr. Prir. Res., No. 2, 136–142 (2001).
G. Yu. Vereshchagin, Tr. Baikal’skoi Limnol. Stantsii 3, 65–268 (1932).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © M.N. Shimaraev, E.S. Troitskaya, V.V. Blinov, V.G. Ivanov, R.Yu. Gnatovskii, 2012, published in Doklady Akademii Nauk, 2012, Vol. 442, No. 5, pp. 696–700.
Rights and permissions
About this article
Cite this article
Shimaraev, M.N., Troitskaya, E.S., Blinov, V.V. et al. Upwellings in Lake Baikal. Dokl. Earth Sc. 442, 272–276 (2012). https://doi.org/10.1134/S1028334X12020183
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1028334X12020183