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Holocene paleoenvironmental records from Nikolay Lake, Lena River Delta, Arctic Russia

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Andreev, A. , Tarasov, P. E. , Schwamborn, G. , Ilyashuk, B. P. , Ilyashuk, E. A. , Bobrov, A. A. , Klimanov, V. A. , Rachold, V. and Hubberten, H. W. (2004): Holocene paleoenvironmental records from Nikolay Lake, Lena River Delta, Arctic Russia , Palaeogeography palaeoclimatology palaeoecology, 209 , pp. 197-217 . doi: 10.1016/J.PALAEO.2004.02.010
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Abstract:

Radiocarbon-dated pollen, rhizopod, chironomid and total organic carbon records from NikolayLake (73°20'N, 124°12'E), Arga Island, Russia reflect mid- to late Holocene vegetation andclimate changes in the Lena Delta area. Shrubby Alnus fruticosa and Betula nana tundra existedon Arga Island during 6000-4200 14C yr BP, and gradually disappeared after that time. Pollen-based climate reconstructions suggest that climate was relatively warm during 6000-5300 14C yrBP, and rather unstable between ca 5100-3500 14C yr BP. Both qualitative interpretation of pollendata and results of quantitative reconstruction imply that climate and vegetation became similarto modern-day conditions after ca 3400 14C yr BP.

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