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Holocene climate variability on the Kola Peninsula, Russian Subarctic, based on aquatic invertebrate records from lake sediments

Published online by Cambridge University Press:  20 January 2017

Elena A. Ilyashuk ,
Boris P. Ilyashuk ,
Vasily V. Kolka  and
Dan Hammarlund
Elena A. Ilyashuk*
Affiliation:
Institute of Ecology, University of Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria Institute of North Industrial Ecology Problems, Kola Science Centre, Russian Academy of Sciences, 14 Fersman St., Apatity, Murmansk reg., 184209 Russia
Boris P. Ilyashuk
Affiliation:
Institute of Ecology, University of Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria Institute of North Industrial Ecology Problems, Kola Science Centre, Russian Academy of Sciences, 14 Fersman St., Apatity, Murmansk reg., 184209 Russia
Vasily V. Kolka
Affiliation:
Geological Institute, Kola Science Centre, Russian Academy of Sciences, 14 Fersman St., Apatity, Murmansk reg., 184209 Russia
Dan Hammarlund
Affiliation:
Department of Geology, Quaternary Sciences, Lund University, Sölvegatan 12, SE-223 62 Lund, Sweden
*
*Corresponding author at: Institute of Ecology, University of Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria. Fax: + 43 512 507 51799. E-mail address:[email protected] (E.A. Ilyashuk).
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Abstract

Sedimentary records of invertebrate assemblages were obtained from a small lake in the Khibiny Mountains, Kola Peninsula. Together with a quantitative chironomid-based reconstruction of mean July air temperature, these data provide evidence of Holocene climate variability in the western sector of the Russian Subarctic. The results suggest that the amplitude of climate change was more pronounced in the interior mountain area than near the White Sea coast. A chironomid-based temperature reconstruction reflects a warming trend in the early Holocene, interrupted by a transient cooling at ca. 8500–8000 cal yr BP with a maximum drop in temperature (ca. 1°C) around 8200 cal yr BP. The regional Holocene Thermal Maximum, characterized by maximum warmth and dryness occurred at ca. 7900–5400 cal yr BP. During this period, July temperatures were at least 1°C higher than at present. The relatively warm and dry climate persisted until ca. 4000 cal yr BP, when a pronounced neoglacial cooling was initiated. Minimum temperatures, ca. 1–2°C lower than at present, were inferred at ca. 3200–3000 cal yr BP. Faunal shifts in the stratigraphic profile imply also that the late-Holocene cooling was followed by a general increase in effective moisture.

Keywords

MidgesChironomidaeOribatid mitesHolocenePalaeoclimateKola PeninsulaRussia
Type
Research Article
Information
Quaternary Research , Volume 79 , Issue 3 , May 2013 , pp. 350 - 361
Copyright
University of Washington

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