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Late Weichselian (Valdaian) and Holocene vegetation and environmental history of the northern Timan Ridge, European Arctic Russia

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Show simple item record Paus, Aage eng Svendsen, John-Inge eng Matiouchkov, Alexei eng 2004-07-30T09:03:23Z 2004-08-03T12:57:53Z 2004-08-26T11:58:39Z 2004-07-30T09:03:23Z 2004-08-03T12:57:53Z 2004-08-26T11:58:39Z 2003 eng
dc.identifier.citation Quaternary Science Reviews 2003 22(21-22): 2285-2302 en
dc.identifier.issn 0277-3791 eng
dc.description.abstract Lake and peat deposits from the Timan Ridge, Arctic Russia, were pollen analysed, reconstructing the vegetation history and paleoenvironment since the Last Glacial Maximum (LGM) 20–18,000 years ago. The sites studied are located inside the margins of a large paleolake of about 20 km², by us named Lake Timan. This lake developed in the Late Weichselian, more than 30,000 years after the deglaciation of this region, and was formed due to increased precipitation and warmer summers that accelerated the melting of stagnant ice within its catchment. The lake was drained during the early Holocene when the outlet rivers eroded the spillways. A new generation of much smaller lakes formed during the Holocene when the last remnants of buried glacier ice melted away causing the exposed floor of Lake Timan to subside. Since deglaciation, the following regional vegetation development has been recorded: (1) During the initial stage of Lake Timan, the dominant vegetation was discontinuous steppe/tundra, with patches of snow bed vegetation. (2) A dwarf-shrub tundra established during the Late Weichselian interstadial (Allerød), probably reflecting warmer and moister conditions. (3) The Younger Dryas cooling is recognised by a reversal to steppe/tundra and snowbeds on unstable mineral-soils, and higher palynological richness. (4) Soon after the transition into the Holocene, a birch-forest established on the Timan Ridge. (5) A cooling starting around 8200 cal.years BP initiated the deforestation of the exposed hills. In the most protected sites, birch trees persisted until later than 4000 years ago, reflecting a gradual development into the present treeless dwarf-shrub tundra. en
dc.format.extent 70594 bytes eng
dc.format.extent 3402325 bytes eng
dc.format.extent 166 bytes eng
dc.format.mimetype text/plain eng
dc.format.mimetype application/pdf eng
dc.format.mimetype text/plain eng
dc.language.iso eng eng
dc.publisher Elsevier eng
dc.title Late Weichselian (Valdaian) and Holocene vegetation and environmental history of the northern Timan Ridge, European Arctic Russia eng
dc.type Journal article eng
dc.type Peer reviewed eng
dc.rights.holder Copyright 2003 Elsevier Science Ltd.
bora.peerreviewed Peer reviewed eng
bibo.doi eng

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