Radiocarbon ages and pollen record of a sediment core from Lake Lyadhej-To ...

• Main Authors: Andreev, Andrei A, Tarasov, Pavel E, Ilyashuk, Boris P, Ilyashuk, Elena A, Cremer, Holger, Hermichen, Wolf-Dieter, Wischer, Frank, Hubberten, Hans-Wolfgang
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2005
• Subjects: Gravity corer; Permafrost Research Periglacial Dynamics @ AWI AWI_PerDyn; Ice; permafrost
• Online Access: https://dx.doi.org/10.1594/pangaea.728454; https://doi.pangaea.de/10.1594/PANGAEA.728454

An 1180-cm long core recovered from Lake Lyadhej-To (68°15'N, 65°45'E, 150 m a.s.l.) at the NW rim of the Polar Urals Mountains reflects the Holocene environmental history from ca. 11,000 cal. yr BP. Pollen assemblages from the diamicton (ca. 11,000-10,700 cal. yr BP) are dominated by Pre-Quaternary spores and redeposited Pinaceae pollen, pointing to a high terrestrial input. Turbid and nutrient-poor conditions existed in the lake ca. 10,700-10,550 cal. yr BP. The chironomid-inferred reconstructions suggest that mean July temperature increased rapidly from 10.0 to 11.8 °C during this period. Sparse, treeless vegetation dominated on the disturbed and denuded soils in the catchment area. A distinct dominance of planktonic diatoms ca. 10,500-8800 cal. yr BP points to the lowest lake-ice coverage, the longest growing season and the highest bioproductivity during the lake history. Birch forest with some shrub alder grew around the lake reflecting the warmest climate conditions during the Holocene. Mean July ... : Supplement to: Andreev, Andrei A; Tarasov, Pavel E; Ilyashuk, Boris P; Ilyashuk, Elena A; Cremer, Holger; Hermichen, Wolf-Dieter; Wischer, Frank; Hubberten, Hans-Wolfgang (2005): Holocene environmental history recorded in Lake Lyadhej-To sediments, Polar Urals, Russia. Palaeogeography, Palaeoclimatology, Palaeoecology, 223(3-4), 181-203 ...