Multi-proxy records of Two-Yurts Lake ...

• Main Authors: Hoff, Ulrike, Biskaborn, Boris K, Dirksen, Veronika G, Dirksen, Oleg V, Kuhn, Gerhard, Meyer, Hanno, Nazarova, Larisa B, Roth, Alexandra, Diekmann, Bernhard
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2015
• Subjects: Permafrost Research Periglacial Dynamics @ AWI AWI_PerDyn; Kamchatka; permafrost
• Online Access: https://dx.doi.org/10.1594/pangaea.848682; https://doi.pangaea.de/10.1594/PANGAEA.848682

Within the scope of Russian-German palaeoenvironmental research, Two-Yurts Lake (TYL, Dvuh-Yurtochnoe in Russian) was chosen as the main scientific target area to decipher Holocene climate variability on Kamchatka. The 5x2 km large and 26 m deep lake is of proglacial origin and situated on the eastern flank of Sredinny Ridge at the northwestern end of the Central Kamchatka Valley, outside the direct influence of active volcanism. Here, we present results of a multi-proxy study on sediment cores, spanning about the last 7000 years. The general tenor of the TYL record is an increase in continentality and winter snow cover in conjunction with a decrease in temperature, humidity, and biological productivity after 5000-4500 cal yrs BP, inferred from pollen and diatom data and the isotopic composition of organic carbon. The TYL proxy data also show that the late Holocene was punctuated by two colder spells, roughly between 4500 and 3500 cal yrs BP and between 1000 and 200 cal yrs BP, as local expressions of the ... : Supplement to: Hoff, Ulrike; Biskaborn, Boris K; Dirksen, Veronika G; Dirksen, Oleg V; Kuhn, Gerhard; Meyer, Hanno; Nazarova, Larisa B; Roth, Alexandra; Diekmann, Bernhard (2015): Holocene environment of Central Kamchatka, Russia: Implications from a multi-proxy record of Two-Yurts Lake. Global and Planetary Change, 134, 101-117 ...