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.
Helmholtz Research Programs > MARCOPOLI (2004-2008) > POL6-Earth climate variability since the Pliocene