Pollen records and age determinations from 2 profiles at Lake Nikolay, Lena Delta ...

• Main Authors: Andreev, Andrei A, Tarasov, Pavel E, Schwamborn, Georg, Ilyashuk, Boris P, Ilyashuk, Elena A, Bobrov, Anatoly A
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2004
• Subjects: Geological profile sampling; Permafrost Research Periglacial Dynamics @ AWI AWI_PerDyn; lena delta; lena river; permafrost; Tundra
• Online Access: https://dx.doi.org/10.1594/pangaea.726714; https://doi.pangaea.de/10.1594/PANGAEA.726714

Radiocarbon-dated pollen, rhizopod, chironomid and total organic carbon (TOC) records from Nikolay Lake (73°20'N, 124°12'E) and a pollen record from a nearby peat sequence are used for a detailed environmental reconstruction of the Holocene in the Lena Delta area. Shrubby Alnus fruticosa and Betula exilis tundra existed during 10,300-4800 cal. yr BP and gradually disappeared after that time. Climate reconstructions based on the pollen and chironomid records suggest that the climate during ca. 10,300-9200 cal. yr BP was up to 2-3 °C warmer than the present day. Pollen-based reconstructions show that the climate was relatively warm during 9200-6000 cal. yr BP and rather unstable between ca. 5800-3700 cal. yr BP. Both the qualitative interpretation of pollen data and the results of quantitative reconstruction indicate that climate and vegetation became similar to modern-day conditions after ca. 3600 cal. yr BP. The chironomid-based temperature reconstruction suggests a relatively warm period between ca. 2300 ... : Supplement to: Andreev, Andrei A; Tarasov, Pavel E; Schwamborn, Georg; Ilyashuk, Boris P; Ilyashuk, Elena A; Bobrov, Anatoly A; Klimanov, Vladimir A; Rachold, Volker; Hubberten, Hans-Wolfgang (2004): Holocene paleoenvironmental records from Nikolay Lake, Lena River Delta, Arctic Russia. Palaeogeography, Palaeoclimatology, Palaeoecology, 209(1-4), 197-217 ...