Ice-dammed lakes and rerouting of the drainage of northern Eurasia during the Last Glaciation

Mangerud, J (author)

Jakobsson, M (author)

Alexanderson, Helena (author): Lund University,Lunds universitet,Kvartärgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Quaternary Sciences,Department of Geology,Faculty of Science

Astakhov, V (author)

Clarke, GKC (author)

Henriksen, M (author)

Hjort, Christian (author): Lund University,Lunds universitet,Kvartärgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Quaternary Sciences,Department of Geology,Faculty of Science

Krinner, G (author)

Lunkka, JP (author)

Möller, Per (author): Lund University,Lunds universitet,Kvartärgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Quaternary Sciences,Department of Geology,Faculty of Science

Murray, A (author)

Nikolskaya, O (author)

Saarnisto, M (author)

Svendsen, JI (author)

(creator_code:org_t)

Elsevier BV, 2004
2004
English.
In: Quaternary Science Reviews. - : Elsevier BV. - 0277-3791. ; 23:11-13, s. 1313-1332

Related links:: http://dx.doi.org/10...; show more...; https://lup.lub.lu.s...; https://doi.org/10.1...; show less...

Abstract Subject headings

During the Quaternary period, ice sheets centred over the Barents and Kara seas expanded several times onto mainland Russia and blocked northflowing rivers, such as the Yenissei, Ob, Pechora and Mezen. Large ice-dammed lakes with reversed outlets, e.g. toward the Caspian Sea, formed south of these ice sheets. Some lakes are reconstructed from shorelines and lacustrine sediments, others mainly from ice-sheet configuration. Ice-dammed lakes, considerably larger than any lake on Earth today, are reconstructed for the periods 90-80 and 60-50 ka. The ages are based on numerous optically stimulated luminescence (OSL) dates. During the global Last Glacial Maximum (LGM, about 20 ka) the Barents-Kara Ice Sheet was too small to block these eastern rivers, although in contrast to the 90-80 and 60-50 ka maxima, the Scandinavian Ice Sheet grew large enough to divert rivers and meltwater across the drainage divide from the Baltic Basin to the River Volga, and that way to the Caspian Sea. Climate modelling shows that the lakes caused lower summer temperatures on the continent and on the lower parts of the ice sheet. The final drainage of the best mapped lake is modelled, and it is concluded that it probably emptied within few months. We predict that this catastrophic outburst had considerable impact on sea-ice formation in the Arctic Ocean and on the climate of a much larger area. (C) 2003 Elsevier Ltd. All rights reserved.

By the author/editor: Mangerud, J; Jakobsson, M; Alexanderson, He ...; Astakhov, V; Clarke, GKC; Henriksen, M; show more...; Hjort, Christian; Krinner, G; Lunkka, JP; Möller, Per; Murray, A; Nikolskaya, O; Saarnisto, M; Svendsen, JI; show less...

About the subject

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