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DOI	10.1016/j.quascirev.2020.106243
	Floral evidence for high summer temperatures in southern Scandinavia during 15–11 cal ka BP
	Schenk F.; Bennike O.; Väliranta M.; Avery R.; Björck S.; Wohlfarth B.
发表日期	2020
ISSN	0277-3791
卷号	233
英文摘要	The global climate transition from the Lateglacial to the Early Holocene is dominated by a rapid warming trend driven by an increase in orbital summer insolation over high northern latitudes and related feedbacks. The warming trend was interrupted by several abrupt shifts between colder (stadial) and warmer (interstadial) climate states following instabilities of the Atlantic Meridional Overturning Circulation (AMOC) in response to rapidly melting ice sheets. The sequence of abrupt shifts between extreme climate states had profound impacts on ecosystems which make it challenging to reliably quantify state variables like July temperatures within a non-analogue climate envelope. For Europe, there is increasing albeit inconclusive evidence for higher stadial summer temperatures than initially thought. Here we present a comprehensive floral compilation of plant macrofossils from lake sediment cores of 15 sites from S-Scandinavia covering the period ∼15 to 11 ka BP. We find evidence for a continued presence of plant species indicating high July temperatures throughout the last deglaciation. The presence of hemiboreal plants in close vicinity to the southern margin of the Fennoscandian Ice Sheet implies a strong thermal summer forcing for the rapid ice sheet melt. Consistent with some recent studies, we do not find evidence for a general stadial summer cooling, which indicates that other reasons than summer temperatures caused drastic setbacks in proxy signals possibly driven by extreme winter cooling and/or shorter warm seasons. © 2020
英文关键词	Deglaciation; Paleoclimatology; Plant macrofossils; Scandinavia; Summer temperatures
语种	英语
scopus关键词	Glaciers; Oceanography; Deglaciations; Paleoclimatology; Plant macrofossils; Scandinavia; Summer temperature; Ice; cooling; flora; global climate; high temperature; ice sheet; insolation; lacustrine deposit; last deglaciation; meridional circulation; microfossil; paleoclimate; plant; Scandinavia
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151542
作者单位	Bolin Centre for Climate Research and Department of Geological Sciences, Stockholm University, Svante Arrhenius Väg 8, Stockholm, SE106-91, Sweden; Geological Survey of Denmark and Greenland, Øster Voldgade 10, Copenhagen K, DK 1350, Denmark; Environmental Change Research Unit (ECRU), Ecosystems and Environment Research Programme, University of Helsinki, PO Box 65, Helsinki, FI-00014, Finland; Department of Geology, Quaternary Sciences, Lund University, Box 117, Lund, SE221-00, Sweden
推荐引用方式 GB/T 7714	Schenk F.,Bennike O.,Väliranta M.,等. Floral evidence for high summer temperatures in southern Scandinavia during 15–11 cal ka BP[J],2020,233.
APA	Schenk F.,Bennike O.,Väliranta M.,Avery R.,Björck S.,&Wohlfarth B..(2020).Floral evidence for high summer temperatures in southern Scandinavia during 15–11 cal ka BP.Quaternary Science Reviews,233.
MLA	Schenk F.,et al."Floral evidence for high summer temperatures in southern Scandinavia during 15–11 cal ka BP".Quaternary Science Reviews 233(2020).