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Last Interglacial Climate in Northern Sweden - Insights from a Speleothem Record
Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of Archaeology and Ancient History, Classical archaeology and ancient history. Stockholm Univ, Bolin Ctr Climate Res, SE-10691 Stockholm, Sweden.ORCID iD: 0000-0001-7433-268x
Univ Helsinki, Dept Geosci & Geog, POB 64, FI-00014 Helsinki, Finland;Univ Bordeaux, Environm & Paleoenvironm Ocean & Continentaux, UMR 5805, F-33615 Pessac, France.
Heidelberg Univ, Inst Environm Phys, D-69120 Heidelberg, Germany.
Stockholm Univ, Bolin Ctr Climate Res, SE-10691 Stockholm, Sweden;Univ Helsinki, Inst Atmospher & Earth Syst Res INAR Phys, Varrio Res Stn, POB 64, FI-00014 Helsinki, Finland.
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2019 (English)In: QUATERNARY, ISSN 2571-550X, Vol. 2, no 3, article id 29Article in journal (Refereed) Published
Abstract [en]

Continental records with absolute dates of the timing and progression of climatic conditions during the Last Interglacial (LIG) from northern Europe are rare. Speleothems from northern Europe have a large potential as archives for LIG environmental conditions since they were formed in sheltered environments and may be preserved beneath ice sheets. Here, we present delta C-13 and delta O-18 values from speleothem Kf-21, from Korallgrottan in Jamtland (northwest Sweden). Kf-21 is dated with five MC-ICPMS U-Th dates with errors smaller than similar to 1 ka. Kf-21 started forming at similar to 130.2 ka and the main growth phase with relatively constant growth rates lasted from 127.3 ka to 124.4 ka, after which calcite formation ceased. Both delta C-13 and delta O-18 show rapid shifts but also trends, with a range of values within their Holocene counterparts from Korallgrottan. Our results indicate an early onset of the LIG in northern Europe with ice-free conditions at similar to 130 ka. Higher growth rates combined with more negative delta O-18 values between similar to 127.3 and 126.8 ka, interpreted here as warmer and more humid conditions, as well as indications of a millennial-scale cold spell centered at 126.2 ka, resemble findings from speleothem records from other parts of Europe, highlighting that these were regional scale climatic patterns.

Place, publisher, year, edition, pages
MDPI , 2019. Vol. 2, no 3, article id 29
Keywords [en]
Last Interglacial (LIG), speleothem, stable carbon and oxygen isotope compositions, climate variability, Scandinavia, Sweden
National Category
Geosciences, Multidisciplinary
Identifiers
URN: urn:nbn:se:uu:diva-395920DOI: 10.3390/quat2030029ISI: 000487949900007OAI: oai:DiVA.org:uu-395920DiVA, id: diva2:1366677
Funder
Swedish Nuclear Fuel and Waste Management Company, SKBAcademy of Finland, 1310649Available from: 2019-10-30 Created: 2019-10-30 Last updated: 2019-10-30Bibliographically approved

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