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DOI10.1007/s10933-018-00064-y
Chironomid-based temperature reconstruction for the Eemian Interglacial (MIS 5e) at Sokli, northeast Finland
Plikk, Anna1,2; Engels, Stefan3; Luoto, Tomi P.4; Nazarova, Larisa5,6,7; Salonen, J. Sakari8; Helmens, Karin F.1,2
发表日期2019
ISSN0921-2728
EISSN1573-0417
卷号61期号:3页码:355-371
英文摘要

The Last Interglacial (Eemian, MIS 5e) can be considered a test-bed for climate dynamics under a warmer-than-present climate. In this study we present a chironomid record from the high latitude Sokli site (N Finland), where a long continuous sediment sequence from the last interglacial has been preserved from glacial erosion. The chironomid-analysis shows a diverse fauna, with dominance of warm-water indicators and shifts in assemblage composition that can be attributed to temperature, lake depth, productivity and habitat availability. Quantitative mean July paleotemperature estimates based on the chironomid data indicate overall mean July air temperatures up to 1 degrees C warmer than present. Two cooling events can be discerned, the Tunturi event, dated to about 127.5kaBP, in the lower part of the sequence, and the Varrio event, dated to about 119kaBP, associated with the beginning of a cooling trend in the upper part of the record. Warm conditions already at the onset of the interglacial contrast with a recent chironomid-based last interglacial temperature reconstruction from Denmark, which suggests a late onset of Eemian warming. The relatively small increase in inferred temperatures compared to present day temperatures at Sokli differs from other high latitude Eemian sites, and likely reflects the influence of the Atlantic Meridional Overturning Circulation in maintaining already elevated temperatures in Fennoscandia during interglacials.


WOS研究方向Environmental Sciences & Ecology ; Geology ; Marine & Freshwater Biology
来源期刊JOURNAL OF PALEOLIMNOLOGY
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/93826
作者单位1.Stockholm Univ, Dept Phys Geog, S-10691 Stockholm, Sweden;
2.Stockholm Univ, Bolin Ctr Climate Res, S-10691 Stockholm, Sweden;
3.Birkbeck Univ London, Dept Geog, 32 Tavistock Sq, London, England;
4.Univ Helsinki, Fac Biol & Environm Sci, Ecosyst & Environm Res Programme, Niemenkatu 73, Lahti 15140, Finland;
5.Univ Potsdam, Inst Earth & Environm Sci, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany;
6.Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Telegrafenberg A43, D-14473 Potsdam, Germany;
7.Kazan Fed Univ, Kremlyovskaya Str 18, Kazan 420008, Russia;
8.Univ Helsinki, Dept Geosci & Geog, POB 64, FIN-00014 Helsinki, Finland
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GB/T 7714
Plikk, Anna,Engels, Stefan,Luoto, Tomi P.,et al. Chironomid-based temperature reconstruction for the Eemian Interglacial (MIS 5e) at Sokli, northeast Finland[J],2019,61(3):355-371.
APA Plikk, Anna,Engels, Stefan,Luoto, Tomi P.,Nazarova, Larisa,Salonen, J. Sakari,&Helmens, Karin F..(2019).Chironomid-based temperature reconstruction for the Eemian Interglacial (MIS 5e) at Sokli, northeast Finland.JOURNAL OF PALEOLIMNOLOGY,61(3),355-371.
MLA Plikk, Anna,et al."Chironomid-based temperature reconstruction for the Eemian Interglacial (MIS 5e) at Sokli, northeast Finland".JOURNAL OF PALEOLIMNOLOGY 61.3(2019):355-371.
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