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Siberian River Run-Off and Late Quaternary Glaciation in the Southern Kara Sea, Arctic Ocean: Preliminary Results

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Citation:
Stein, R. , Niessen, F. , Dittmers, D. , Levitan, M. , Schoster, F. , Simstich, J. , Steinke, T. and Stepanets, O. V. (2002): Siberian River Run-Off and Late Quaternary Glaciation in the Southern Kara Sea, Arctic Ocean: Preliminary Results , Polar Research, 21 , pp. 315-322 .
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Abstract:

A detailed echosounding survey performed during the "Boris Petrov" Expedition 2001 allowed to map part of the still unkown extent of the eastern Last Glacial Maximum (LGM) Barents-Kara Ice Sheet in great detail. Based on the profiling results, a southern connection between the LGM Barents-Kara Ice Sheet and a local ice sheet on Taymyr Peninsula as proposed by Alexanderson et al. (2001) appears to be unlikely. Based on sediment core data and profiling results, most of the terrigenous river-derived material accumulated in the estuaries during late Holocene times whereas during early Holocene times of lowered sea level major amounts were transported further offshore and accumulated on the shelf. During the post-glacial sea-level rise, the main depocenter migrated southward reaching its present position no earlier than about 6 Cal KyrsBP (or 5.2 Kya). Future studies of AMS14C-dated sediment cores will allow a detailed reconstruction of the variability of fluvial sediment discharge and the history glaciation in the Kara Sea during late Quaternary times.

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