Floral evidence for high summer temperatures in southern Scandinavia during 15-11 cal ka BP

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dc.contributor.author Schenk, Frederik
dc.contributor.author Bennike, Ole
dc.contributor.author Valiranta, Minna
dc.contributor.author Avery, Rachael
dc.contributor.author Björck, Svante
dc.contributor.author Wohlfarth, Barbara
dc.date.accessioned 2020-10-08T07:59:01Z
dc.date.available 2020-10-08T07:59:01Z
dc.date.issued 2020-04-01
dc.identifier.citation Schenk , F , Bennike , O , Valiranta , 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 , vol. 233 , 106243 . https://doi.org/10.1016/j.quascirev.2020.106243
dc.identifier.other PURE: 145535965
dc.identifier.other PURE UUID: df6301b7-ae95-4bbe-a9c1-6266d4e72437
dc.identifier.other WOS: 000525787700017
dc.identifier.other ORCID: /0000-0003-0129-7240/work/81733861
dc.identifier.uri http://hdl.handle.net/10138/320058
dc.description.abstract 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 similar to 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. (C) 2020 The Authors. Published by Elsevier Ltd. en
dc.format.extent 12
dc.language.iso eng
dc.relation.ispartof Quaternary Science Reviews
dc.rights cc_by_nc_nd
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Deglaciation
dc.subject Paleoclimatology
dc.subject Scandinavia
dc.subject Plant macrofossils
dc.subject Summer temperatures
dc.subject YOUNGER DRYAS
dc.subject ENVIRONMENTAL-CHANGE
dc.subject CLIMATIC CHANGES
dc.subject NORTHERN EUROPE
dc.subject BALTIC SEA
dc.subject ICE-SHEET
dc.subject KYR BP
dc.subject HOLOCENE
dc.subject LAKE
dc.subject RECONSTRUCTION
dc.subject 1172 Environmental sciences
dc.title Floral evidence for high summer temperatures in southern Scandinavia during 15-11 cal ka BP en
dc.type Article
dc.contributor.organization Helsinki Institute of Sustainability Science (HELSUS)
dc.contributor.organization Environmental Change Research Unit (ECRU)
dc.contributor.organization University Management
dc.contributor.organization Ecosystems and Environment Research Programme
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1016/j.quascirev.2020.106243
dc.relation.issn 0277-3791
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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